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For the best experience we suggest that you download the newest version of a supported browser:. Point Level Continuous Interface. HydroRanger Ultrasonic Level Controller HydroRanger is an ultrasonic level controller for up to six pumps and provides control, differential control and open channel flow monitoring.
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Specify a different format type and try again. Read the value from the appropriate parameter register the example uses 44, Writing Parameters The method of writing parameters is similar to the method of reading them.
Become familiar with Reading Parameters, page 96, before attempting to write any parameters. Write the secondary index value into R43, Write the value to the appropriate parameter register. Format Words R46, to R46, Format words are unsigned integers that contain up to three values described below. The number of values used in the format words depends on the Parameter Index Location P that is used.
The decimal offset indicates how the remote system must interpret the integer value that is stored in the parameter access register. The following table shows how different parameter values can be shown based on a register value integer of For the convenience of the programmer, those values are converted to and from a bit integer number.
This section describes the conversion process. Numeric Values Numeric parameter values are the most common. For example, parameter P Reading returns a number that represents the current reading either level or volume, depending on the HydroRanger configuration. Numeric values are requested or set in units or percent of span, and may be specified with a number of decimal places.
If this overflow happens, decrease the number of decimal places. If a parameter cannot be expressed in terms of percent of span, or has no meaningful value, the number 22, is returned. Try requesting the parameter in units, or refer to P in the Parameter Reference section on page Bit Values Bits are packed into registers in groups of 16 bits 1 word. In this manual, the bits are numbered from 1 to 16, with bit 1 as the least significant bit LSB and bit 16 as the most significant bit MSB.
By default, they are set up so that the first word register is the most significant word MSW and the second word register is the least significant word LSW. See Word Order R40, on page 92 for details.
The position of the decimal place is dependent on the register. For more details see the description of the register. Split Values Certain parameters are actually a pair of numbers separated by a colon, using this format: xx:yy. Not reply. This means that something went wrong with the transmission of the message. Echo back the command with the correct response see the Modbus specification for more details. This is the normal response. Return an Exception Code.
This reflects an error in the message. HydroRanger uses the following exception codes: Code Name Meaning 01 Illegal Function The function code received in the query is not an allowable action for the slave.
Error Handling Errors can be traced to two general sources: 1. There is an error in transmission. The host tries to do something that is not a valid action. In the first case, the HydroRanger does not respond and the master waits for a response time out error, which causes the master to re-send the message.
In the second case, the response depends on what the host tries to do. In general, HydroRanger will not give an error to the host request. However, the current value will not reflect the desired new value. However, this is not guaranteed and there may be no response.
Check the wiring pin outs and verify that the connection is correct. Verify that values in the set-up parameters P to P match the settings in the computer used to communicate with the unit. Check that the port on the computer is correct. Sometimes trying a different Modbus driver will solve the problem. An easy stand-alone driver called ModScan32 is available from Win-Tech at www.
This driver is helpful for testing communications. Specifically 1. The HydroRanger is set to communicate via a modem but no communication is returning to the master. Note that there is a difference between wiring directly to a computer and wiring to a modem. Verify that the modem is set up correctly. Milltronics has a series of Application Guides that may help. Please contact your local Siemens Milltronics representative for more information on Application Guides.
A HydroRanger parameter is set via remote communications, but the parameter remains unchanged. Try putting the Milltronics device in program mode, using the operating mode function. Try setting the parameter from the keypad. If it can not be set using the keypad, check the lock parameter and set it to Built into HydroRanger is an advanced handshaking area that can be used to read and write single registers to the HydroRanger This section performs a similar function to the Parameter access section.
The differences are: 1. Advanced section is more powerful and harder to program. Advanced section only gives you access to one parameter at a time. Mapping Communication Appendix A mmmmm Parameter Read and Write 40, — 40, is a series of eight registers used for reading and writing parameter values to and from the HydroRanger The first three registers are always unsigned integers representing parameters and index values.
The second five registers are the format and value s of the parameter. All parameters normally accessed through the hand-held programmer are available through these registers. Address Description 40, Parameter integer 40, Primary Index integer 40, Secondary Index integer 40, Format word bit mapped 40, Read value, word 1 40, Read value, word 2 40, Write value, word 1 40, Write value, word 2 Reading Parameters To read parameters through Modbus do the following steps: 1.
Send the parameter, its primary index, and its secondary index usually 0 , and format to registers 40, to 40, Wait until you can read the written values from the registers 40, to 40, to confirm that the operation is complete. Read the value from registers 40, and 40, Send the parameter, its primary index, and its secondary index usually 0 to registers 40,, 40,, and 40, Write the value to registers 40, and 40, Write the desired format word to register 40, to enable the HydroRanger to interpret the value correctly.
The value is sent as an integer to register 40, to format the output words 40, and 40, accordingly. If the numeric data type is set for integer and the value contains decimal places, they are ignored.
In this situation, use the decimal offset to ensure that you have an integer value and then write your code to recognize and handle the decimal offset. This allows for potential error codes. Currently the HydroRanger has two error codes available. Please check your value entries carefully before operating the HydroRanger to ensure optimum performance. It uses a fixed value which can be discovered by unauthorized personnel. Access this parameter directly type and enter any value except to secure programming lock.
To unlock the HydroRanger , access this parameter and enter Primary Index Global 0 Out-of-service 1 Level — how full the vessel is. If two transducers are used, all transducer parameters become indexed, and a third level point is calculated. The points must be globally set to either 4 or 5 as required.
Point 3 becomes the calculated value as shown above. See Rake Control example on page P Material Specifies material type. Slower settings provide higher accuracy.
Faster settings allow for more level fluctuations. Existing values are converted and do not have to be re-entered. Primary Index Values Transducer Range: 0. P Span Sets the range levels to be measured.
Enter a value reflecting maximum application range. Many other parameters are set as a percentage of span even if they are entered in units. The values of these other parameters may change if the span is altered after installation and the other parameters are measured using a level determined upward from the Empty level toward the transducer face.
Volumes are based on span. Set for the maximum volume point if volume calculations are needed. Use these parameters to configure the HydroRanger to show readings based on vessel or wet well volume rather than level. In RUN mode, readings are displayed in percent of maximum volume. Primary Index Global Range: 0. Go to Parameter P For each index enter a breakpoint in measurement units. Ensure that each breakpoint corresponds to the same index for P P Volume Breakpoints and Characterization Universal Volume Calculation Each segment defined by the level breakpoints P requires a volume so that the HydroRanger can make the level-to-volume calculations.
For each index enter a volume. Ensure that each volume corresponds to the same index for P For more on Volume Characterization, go to page P Convert Reading Multiplies the current value by the specified amount to allow for scaling. For example, if the reservoir contains litres per vertical meter, use to get the reading in litres.
It must not be used in place of the volume parameters if any volume dependent features such as pump efficiency are used. To calculate true volumes see Volume P to P Avoid entering a value that, when multiplied by the maximum current Reading, exceeds the display capabilities. If value exceeds four digits, EEEE is shown. P Offset Reading Adds the specified value to the level reading, usually to reference the reading to sea level or another datum level. This value is used for display purposes only.
All control measurements are still referenced to Empty. Backup Level Override Parameters mmmmm Use this feature to override the ultrasonic reading by a discrete input such as a contacting point device. The ultrasonic reading will be fixed at the programmed switch level until the discrete input is released.
The ultrasonic device makes decisions based on the override values. P Reading Override Enable Sets the discrete input to act as the source for a level reading override. Primary Index Transducer Values Range: 0. Digital Input 2 is connected to a Hi Level Backup switch located a level of 4. Parameter Index Value P 1 2 P 1 4.
The reading stays at 4. This can add up to four seconds to the overall response time depending on operating conditions and programming. Set in seconds. Primary Index Values Global Range: 0. The material level is reported based on P Failsafe Material Level. See P Relay Failsafe. Only use No Delay 0.
Relay reaction The way in which relay programming reacts to the failsafe level depends on P Relay Failsafe page While the number of devices is limited by the relays, all control functions are accessible through software and each parameter is indexed to the three or six relays. See the Relay section on page Preset Applications P The HydroRanger makes standard applications easier to program by providing an extensive list of presets.
Start with a preset application and then change the required parameters to make the task more efficient.
Setpoints P, P Each relay is triggered by one or more setpoints. The setpoints can be based on absolute level P, P or rate of change P, P Each control function specifies which setpoints are required.
P Preset Applications Six preset applications to configure or bench test the unit. If none suit, then refer to P Relay Control Function on page Note: Programming the relays independently is the most common method used. P Relay Control Function Sets the control algorithm used to trip the relay. Used to control a pump flushing device based on Flush Systems P to P Based on input from external communications.
See Communications on page 83 for further reference. When reading and setting this parameter through Modbus or SmartLinx communications the parameter values are mapped to different numbers. This parameter is set according to Span P even when another reading, such as volume, is shown on the LCD. Enter the dead band in either percent of span or units of measure P The dead band value is applied both above and below the upper and lower bound setpoints as shown in the figure.
See P Relay Control Function for more information. Check the wiring before programming. To use relays 3 or 6 as general alarm indicators, set P to 3 — negative logic and wire the alarm for normally open operation. When an alarm event occurs see below or when power is cut, the circuit closes and the alarm activates. Parameters mmmmm Positive Logic In software, all relays are programmed the same way, with ON setpoints indicating when to change the relay contact state open or closed.
P is preset to 2 which is positive logic. Forcing the relay to an activated or de-activated state is similar to the HydroRanger detecting an event and responding to it. Helpful in testing new installations and diagnosing control problems. Pump Setpoint Modifiers P and P These parameters provide alternate ways of starting the pumps in the pump group.
See the Pump Control section on page 51 for descriptions of the pump control algorithms. P Pump by Rate Sets the pump relays to accept control by rate of level change once the first ON setpoint is reached.
Parameters Use this function when multiple pumps are to be controlled by rate of level change rather than by setpoints. To make this parameter useful, assign it to all of the pump relays. The number assigned to each pump relay represents the ratio applied to decide the next pump to start or stop.
Relay Failsafe is only available for the following relay functions P and is not used for any other relay control function. Primary Index Global Values Range: 0. This parameter sets the time between such events. Only the last pump running can run-on. Choose a value long enough to clean out the vessel bottom, yet short enough not to run the pump dry.
Also be sure that this value does not overlap with P Interval. This delay determines when the next pump is permitted to start. When this delay expires, other pumps will start as per P P Wall Cling Reduction Varies the upper and lower setpoints to reduce material buildup on the walls. The Relay Setpoints ON and OFF values are randomly varied inside the range to ensure that the material level does not consistently stop at the same point.
It is applied to pump rotation and occurs independently within each group. Flush Systems P to P Use this feature to control an electrically operated flush valve on a pump to divert some pump output back into the wet well to stir up sediment. Standard Mode Enter the relay number of the pump with the flush valve.
The activation of this pump relay drives the usage of the flush system. P Flush Cycles Sets the number of pump cycles requiring flush control. If either 3 or 4 is selected, then the output is inversely proportional. This value depends on whether mA function P is set as transducer or mA input.
Primary Index Level Values Range: 0. Note: This parameter is applicable only if any mA output has the transducer Point Number as its input source see P and P Primary Index Range: 0. Primary Index mA output Range: 0. Press MODE 2. Or, to produce an mA output at a specific value, enter the value required. Larger values damp more than smaller values and 0 disables the signal filter. Primary Index Values Global Range: to view only Preset: calculated from the input mA signal This parameter is calculated from the input mA signal.
Primary Index mA input Values Range: 0. Use the following parameters to configure the discrete input itself. Sets how discrete signals are interpreted by the HydroRanger The value signals a level override event. This information can help trace problems with both built in and external temperature sensors.
P Temperature, Transducer Minimum View the lowest temperature encountered, as measured by the temperature sensor in the transducer if applicable. Record Readings P and P This identifies the occurrence of the record high and low level readings. The value is that of the pump connected to the associated terminals. Enter a value to set the current record to that value. Use this if a pump is added with a known number of hours logged, or the value can be reset to zero 0 after maintenance.
Alternatively, it can monitor a relay to show how long it has been in a state of alarm. It resets every time the relay is activated.
Primary Index Relay Values Range: 0. Note: the more figures displayed before the decimal, the fewer displayed after. It is the value displayed when key is pressed in the RUN mode.
The eight-digit totalizer is divided into two groups of four digits. The four least significant totalizer digits are stored in P, and the four most significant digits are stored in P Adjust these values separately to set a new total. Enter zero 0 if required to reset the totalizer to zero. Alternatively, enter any other applicable value, to preset the totalizer to the necessary value. Values Range: 0. These features can record up to ten Echo profiles, initiated manually P , or automatically P et al.
If ten Profiles are already saved, addresses 1 through 10 are filled, the oldest automatically initiated record is overwritten. Manually initiated records are not automatically overwritten.
All records are automatically deleted in the event of a power interruption. When a record is displayed, results are based on current programming which may have been altered since the record was saved. This permits the effect on the echo profile to be observed when changing an echo parameter.
P Profile Record Records profiles for later viewing. Type the index number. The profile record information is shown. Saving a manual record Press ENTER to copy the echo profile record in the scope buffer and save it in the selected address in the record library.
The parameter value field displays the new record information. The value returns to - - - -. If is displayed for either P or P, Auto Profile Records are saved regardless of current level subject to all other restrictions.
Therefore, a unit that is powered down on a regular basis will not have an accurate value. Flowrate, based on head at the point of measure specified by the Primary Measuring Device fabricator is also calculated and displayed on the LCD. See P Range Extension on page for more information. If Operation is set for OCM, it is preset to 1. P Flow Exponent The Exponent for the flow calculation formula. It creates an exponential curve with end points set by Max Head P and Zero Head P and with the curve based on the specified exponent.
Use the exponent specified by the PMD manufacturer, or the sample value given below. The dimensions required for each PMD vary. For more information on PDM, see page Use it when the PMD requires a maximum head and flow reference point.
Use when the PMD requires a maximum head and flow reference point. Also use this parameter with Time Units P to define the flowrate units.
The limitation of four digits is for the LCD only, and the flowrate value is available with greater precision through communications. Palmer Bowlus where the zero reference is at a higher elevation than the channel bottom. P Flowrate Units The volume units used to display total flow. P Head Breakpoints The head breakpoints for which flowrate is known. See Universal Calculation Support on page 76 for how to specify universal flows.
Flow Breakpoints Max. Measure the actual head with a tape measure or solid rule. Enter the actual head value. The deviation between the entered Empty P value and the calibrated Empty value is stored in Offset Correction P Alternatively, the Empty parameter P can be corrected directly. If the eight-digit totalizer display or a remote totalizer contact closure are desired, alter the following parameters. When the pump is operating, the estimated inflow volume is added to the pumped volume total.
When the pump stops, the pumped volume of the previous pump cycle is added to the total volume pumped in the totalizer. Inflow rate is estimated by assuming that the rate calculated P just prior to the start of the pump cycle remained constant during the pump cycle. Inflow rate is averaged using rate filter P , rate update time P and rate update distance P to control how the average rate is calculated.
If the position is changed later, the totalizer data in P and P will be incorrect and must be reset according to the new decimal value.
In RUN mode, the number of decimal places displayed is not automatically adjusted. When LCD Total value exceeds display capabilities, it rolls over to 0 and continues incrementing. Primary Index Values Global HydroRanger relays have a maximum frequency of 2. Enter the factor powers of 10 only by which actual volume is divided, prior to Remote Totalizer count increment.
Example: For a Remote Totalizer update by s of volume units, enter 3. Example: To count once every 4. For the flow sampler function this value is used for both the ON time of the relay and the OFF time between contacts.
Sound Velocity: Adjusts speed of sound and changes the measurement calculations. Do Offset calibration at any steady level unless a Sound Velocity calibration is also done. If both calibrations are done then do Offset at a known high level and Sound Velocity at a known low level. Repeat Step One at least five times to verify repeatability. Measure the actual reading use tape measure.
Enter the actual value. P Sound Velocity Calibration Changes the speed of sound constant. Allow sufficient time for the vapor concentration to stabilize. Repeat Step Two at least five times to verify repeatability. Measure the actual reading e. Repeat this procedure if the atmosphere type, concentration, or temperature conditions are different from when the last sound velocity calibration was performed.
Note: In gasses other than air, the temperature variation may not correspond with the speed of sound variation. Turn off temperature sensor and use a fixed temperature. Primary Index Global Values Range: to Temperature P characteristics of air. Primary Index Global Values Range: Values Range: If the transducer does not have an internal temperature sensor, the Temp Fixed P value is used.
Parameters mmmmm In gasses other than air, the temperature variation may not correspond with the speed of sound variation. In these cases turn off the temperature sensor and use a fixed temperature. P Temp Fixed Use this feature if a temperature sensing device is not used.
If the temperature varies with distance from the transducer, enter the average temperature. Use this feature if the temperature measurement from both transducers should be identical, but one is located close to a radiant heat source.
Allocate the temperature measurement of the other transducer to both transducer Point Numbers. Enter the number of the Transducer whose temperature measurement will be used for the distance calculation of the Point Number displayed. When both transducers are allocated to a Point Number, the temperature measurements from each are averaged. This is automatically altered along with Maximum Process Speed P Alternatively, these parameter values may be altered independently.
P Rate Update Time The time period in seconds over which the material level rate of change is averaged before Rate Value update.
Measurement Verification P to P P Fuzz Filter Use this to stabilize the reported level, due to level fluctuations such as a rippling or splashing liquid surface within the Echo Lock Window P The higher the value entered, the greater the fluctuation stabilized. If a material agitator mixer is used in the vessel monitored, set Echo Lock for maximum verification or material agitator to avoid agitator blade detection. Ensure the agitator is always on while the HydroRanger is monitoring the vessel to avoid stationary blade detection.
When set for max verification or material agitator, a new measurement outside of the Echo Lock Window P must meet the sampling criterion P For total lock, Echo Lock Window P is preset to zero 0. The HydroRanger continuously searches for the best echo according to the algorithm chosen P If the selected echo is within the window, the window is then centered about the echo. If not, the window widens with each successive shot until the selected echo is within the window.
The window then returns to its normal width. P Echo Lock Sampling The sampling criterion sets the number of consecutive echoes appearing above or below the echo currently locked onto, that must occur before the measurements are validated as the new reading for Echo Lock P values: 1 or 2. A new measurement in the window re-centers the echoe and the new Reading calculated.
Otherwise, the new measurement is verified by Echo Lock P before the reading is updated. When 0 is entered the window is automatically calculated after each measurement. For slower P Maximum Process Speed values the window is narrow; for faster P values the window becomes wider. This feature may only be used to adjust the delay before the next point is scanned. Enter the amount of delay in seconds.
This value is automatically altered when Maximum Process Speed P is altered. P Shot Delay The delay, in seconds, between transducer shots. Primary Index Transducer Range: 0. If more than one ultrasonic unit is installed for redundancy, this value should be 0. P Scan Time View the elapsed time in seconds since the point displayed was last scanned. If necessary, enter the Parameter Number to default in the Auxiliary Reading display.
That value will show in the auxiliary reading area by default. Other values are available but will reset to the parameter defined here. Primary Index Values Range: 0. Display scrolling is independent from transducer scanning.
Note: Quick Start parameters P — P and those changed from factory default settings cannot be untagged. Refer to the SmartLinx documentation to determine if any of them are used. Communications P to P The HydroRanger communication ports are configured by a series of parameters that are indexed by port. See Communications on page 83 for a complete description of communications set-up. Communication parameters are indexed to these communication ports, unless otherwise noted: Port Description 1 RS port RJ modular telephone 2 RS port on terminal block P Port Protocol The communications protocol used between the HydroRanger and other devices.
The unique identifier of the HydroRanger on the network. Any value may be entered but only the values shown above are supported. For example, many modems default to N which is No parity, 8 data bits, and 1 stop bit. Parameters mmmmm P Data Bits The number of data bits per character. Ensure that the value is low enough to avoid unnecessary delays when an unexpected disconnect occurs but long enough to avoid timeout while unit is legitimately connected.
This parameter value is ignored by the Modbus Master Drivers, as they automatically disconnect when done. P Parameter Index Location Determines where index information is stored for the parameter access area.
Each format work corresponds with the R44, series number in the parameter access map. For example, the format register R46, corresponds to the parameter P and the value is stored in R44, P Hardware Error Parameters mmmmm The results of ongoing hardware tests in the communications circuitry. Communication then resumes. Primary Index Global Values Preset: 0. Extend this value when changing transducer location, mounting, or aiming. Please note that changing the Near Blanking cannot correct measurement problems.
This is often the case with OCM when using weirs and some flumes. P Transducer with Submergence Shield Used when the transducer is expected to be submerged on occasion.
The HydroRanger recognizes the echo and advances the reading to the highest level and operates displays and outputs accordingly. This feature is effective for when power is returned while the transducer is submerged. Select short and long to have short and long acoustic shots fired for each measurement, regardless of the transducer to surface distance.
Select short to have only short shots fired if the Echo Confidence P produced by a short shot exceeds the short Confidence Threshold P and the monitored surface is always within the Short Shot Range P P Confidence Threshold Determines which echoes are evaluated by software. Parameters Use this feature when an incorrect material level is reported. The short and long shot Confidence Thresholds are preset to 10 and 5 respectively. Values are entered as two numbers separated by a decimal point.
The first number is the short shot confidence and the second number is the long shot confidence. P Echo Confidence Displays the echo confidence of the measurement echo from the last shot. Both short and long shot Echo Confidence is displayed. To display this value in the auxiliary display while the unit is running, press Display xy x:y E for 4 seconds.
Description short shot confidence value, long shot not used. See Noise Problems in the Troubleshooting Section on page Anatomy of an Echo Profile The relevant parts of an echo profile are listed here. These are visible in either Dolphin Plus or an oscilloscope.
Parameters Use this feature to monitor the effects of Echo Processing changes. Any combination of the following Scope Displays is available. Take several measurements to verify repeatability and overcome Echo Lock P restrictions.
P Echo Time Filtered The time in ms from the transmission of the pulse, to when it is processed. The Profile Pointer may be moved to any point on the Echo Profile to gain specific information about the profile according to the selected parameter. To move the Profile Pointer to a specific point, enter the desired value and it will move to the nearest acceptable Echo Profile point.
To scroll the Profile Pointer along the Echo Profile: 1. Press to display the Auxiliary Function symbol. Press P or P to move the Profile Pointer to the left or right respectively. When the Profile Pointer Parameters are exited, the scope display automatically changes back to include the Echo Lock Window. Use P Echo Confidence page to determine which algorithm gives the highest confidence under all level conditions. If the wrong echo is processed, observe the echo processing displays and select an alternate algorithm, either by entering the numeric value desired, or as below: 1.
P Spike Filter Dampens spikes in the echo profile to reduce false readings. Enter the width of false echoes in ms to be removed from the long shot Echo Profile.
When a value is keyed in, the nearest acceptable value is entered. P Reform Echo Smoothes jagged peaks in the echo profile. Enter the amount in ms of long shot Echo Profile smoothing required. P Echo Marker Trigger The point on the primary echo on which the measured value is based. Enter the value in percent of echo height to ensure the Echo Lock Window intersects the Echo Profile at the sharpest rising portion of the Echo Profile representing the true echo.
Advanced TVT control applies to long shots only. Use this parameter with caution. Adjustment to this parameter is best done while viewing the echo profile with Dolphin Plus. Refer to the Dolphin Plus online help for details. If Dolphin Plus is not available, then an oscilloscope can be used. See P Scope Displays on page for more information.
The TVT curve is divided into 40 breakpoints, accessible by enabling the point number as the breakpoint index field. Each breakpoint is normalized to a value of 0, as displayed in the parameter value field.
By changing the breakpoint value, up or down, the intensity of the bias applied to that breakpoint of the curve is respectively changed. By changing the value of adjacent breakpoints, the effective bias to the shaper can be broadened to suit the desired correction. In the case of multiple false echoes, shaping can be applied along different points of the curve. Shaping should be applied sparingly in order to avoid missing the true echo.
Parameters mmmmm Changing a breakpoint: 1. Confirm that P, TVT shaper, is on. Go to P Enter the value from —50 to Press 7. This feature should only be used if increased Near Blanking P would extend farther than desired into the measurement range.
P Short Shot Number The number of short shots to be fired and results averaged per transmit pulse. P Short Shot Width Adjust the width in ms of the short shot transmit pulse.
P Short Shot Bias Use this feature to slant the echo evaluation in favour of the short shot echo when both short and long shots are evaluated see P Shot Mode. All LCD segments and symbols are temporarily displayed. Programming is kept and the unit responds as if there had been a power failure. On successful test completion, PASS is displayed. FAIL is displayed if a key is pressed out of sequence or the programmer keypad malfunctions. P Transmit Pulse This feature may be used to monitor the transmit pulse with an oscilloscope connected to the transducer terminals.
An external device must be connected to the RS port for this test. Use this parameter to ensure that both transducers are being stimulated. Enter 0 to toggle all relays at once. Use this parameter to confirm that relay contacts are opening and closing. This feature is helpful when P does not give expected results even though programming was verified.
Primary Index mA output Values Range: 0. The mA output immediately assumes the value entered regardless of any restrictions programmed. P Transducer Temperature Transducer Values Range: to Err is displayed if the transducer is not equipped with an internal temperature sensor. The range and values shown for each of these parameters depends on the Operation P chosen. The readings for each operation are listed below. Ensure the device is in RUN mode.
Type the parameter number. The field changes to the value of the specified parameter These parameters are also available in simulation mode.
See Testing the Configuration section page 79 for instructions on how to control the simulation direction and rate. P Reading Measurement Corresponds to the final reading after all programming is applied. Following a Master Reset, complete reprogramming is required. Performing a Master Reset 1. ALL displays until the reset is complete.
All data for all points will be reset. For convenience, be sure to record the values you want to re-enter. Port Indexed by communications port 2 Relay Indexed by relay 3 or 6 Transducer2 Indexed by transducer 1 or 2 1. Level point typically has one index in Standard Mode. After each shot is fired, sufficient time is provided for echo shot reflection reception before the next if applicable shot is fired. After all shots of the transmit pulse are fired, the resultant echoes are processed.
The transmit pulse shot number, frequency, duration, delay, and associated measurement range are defined by parameters P, and P to P Echo Processing Echo processing consists of echo enhancement, true echo selection, and selected echo verification. True echo verification is automatic.
The position relation in time after transmit of the new echo is compared to that of the previously accepted echo. If the new echo is outside of the Window, it is not accepted until Echo Lock P requirements are satisfied.
This result is divided by 2 to calculate the one way distance. Sound Velocity The sound velocity of the transmission medium is affected by the type, temperature, and vapor pressure of the gas or vapor present. Unless altered, the sound velocity used for the distance calculation is If the transducer is exposed to direct sunlight, use a sunshield or a separate TS-3 temperature sensor. Atmosphere composition other than air can pose a challenge for ultrasonic level measurement. However, excellent results may be obtained by performing a Sound Velocity Calibration P if the atmosphere is homogeneous well mixed , at a fixed temperature, and under consistent vapor pressure.
If the atmosphere temperature is variable, perform frequent Sound Velocity Calibrations to optimize measurement accuracy. Sound Velocity calibration frequency may be determined with experience. If the sound velocity in two or more vessels is always similar, future calibrations may be performed on one vessel and the resultant Velocity P entered directly for the other vessel s. If the sound velocity of a vessel atmosphere is found to be repeatable at specific temperatures, a chart or curve may be developed.
Then, rather than performing a Sound Velocity Calibration each time the vessel temperature changes significantly, the anticipated Velocity P may be entered directly. Scanning When echo processing is complete, if more than 1 vessel is monitored the scanning relay changes state to supply the transmit pulse to the other transducer after the Scan Delay P When high speed scanning is required sometimes the case for equipment position monitoring , the Scan Delay may be reduced.
Reduce the Scan Delay only as required, otherwise premature scanning relay fatigue could occur. Volume Calculation The unit provides a variety of volume calculation features P to P If the vessel does not match any of the eight preset Tank Shape calculations, a Universal Volume calculation may be used. Based on the graph, choose the Universal Volume calculation, and select the level vs.
Generally, the more breakpoints entered, the greater the accuracy. This option provides best results if the curve has sharp angles joining relatively linear sections. Based on the graph, choose the Universal Flow calculation, and select the head versus flow breakpoints to be entered 32 max.
Generally, the more breakpoints entered, the greater the flow calculation accuracy. For combination curves mostly linear but include 1 or more arcs , enter numerous breakpoints along the arc, for best flow calculation accuracy. For more information, go to Typical Flow Characterization on page P Scan Delay seconds 5 5 3 P Long Shot Number 10 5 2 If any of these parameters are independently altered, a Maximum Process Speed P parameter alteration automatically resets the independently altered value.
Slower Maximum Process Speed P provides greater measurement reliability. Use this information with caution. Appendix C: Troubleshooting mmmmm If the setup becomes too confusing use P to reset and start again. No power. Check power supply, wiring, or power fuse. No response to programmer. Displays Short and tb:. Short circuited transducer cable, or defective transducer at indicated terminal block number. Repair or replace as necessary.
Transducer not connected or connection reversed. Check connection to displayed terminal blocks. Open circuited transducer cable, or defective transducer at indicated terminal block number. Displays Open and tb:.
Displays LOE. Weak or non-existent echo. Displays Error and tb:. Proceed to Measurement Difficulties. Wrong transducer selected P Verify transducer type and reenter value. Do not tie white and shield together. Use all three terminal blocks. Transducer connected backwards.
Reverse black and white wires on terminal block. Value too large to display in 4 or 5 characters. Incorrect measurement stabilization. Reading is fixed, regardless of the actual material level. See Maximum Process Speed. Proceed to Measurement Difficulties below. Measurement accuracy improves as level nears transducer.
Reading is erratic, with little or no relation to material level. Incorrect Sound Velocity used for distance calculation. Use a transducer with a built-in temperature sensor or a TS-3 temperature sensor. See Sound Velocity. True echo too weak or wrong echo being processed. Check noise parameters. See Noise Problems. Noise Problems Incorrect readings can be the result of noise problems, either acoustic or electrical, in the application. The noise present at the input to the ultrasonic receiver can be determined by viewing parameter P The display reads : , where the first number is the average noise and the second is the peak noise.
In general, the most useful value is the average noise. With no transducer attached the noise is under 5 dB. This is often called the noise floor. If the value with a transducer attached is greater than 5 dB, then signal processing problems can occur. High noise decreases the maximum distance that can be measured. The exact relationship between noise and maximum distance is dependent on the transducer type and the material being measured.
Any average noise level greater than 20 dB is probably cause for concern unless the distance is much shorter than the maximum for the transducer. If the measured noise is below 5 dB, then continue here. Connect only the shield wire of the transducer to the HydroRanger If the measured noise is below 5 dB, continue with the next step.
If the noise is above 5 dB, go to Common Wiring Problems. Connect the white and black transducer wires to the HydroRanger Record the average noise.
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