TRIDENT & TRIDENT X2 MODEL PD765 Instruction Manual • • • • • • • • • • • • • Accepts Current, Voltage, TC, & RTD Inputs 4 Digit Display, 0.56" (14 mm) or 1.
Trident Model PD765 Universal Input Meter Instruction Manual Disclaimer The information contained in this document is subject to change without notice. Precision Digital makes no representations or warranties with respect to the contents hereof, and specifically disclaims any implied warranties of merchantability or fitness for a particular purpose. Registered Trademarks MeterView® is a registered trademark of Precision Digital Corporation, Modbus® is a registered trademark of Schneider Automation Inc.
Trident Model PD765 Universal Input Meter Instruction Manual ORDERING INFORMATION Trident 85-265 VAC Model PD765-6R0-00 PD765-6R0-10 PD765-6R2-00 PD765-6R2-10 PD765-6R3-00 PD765-6R3-10 PD765-6R3-20 12-36 VDC Model PD765-7R0-00 PD765-7R2-00 PD765-7R3-00 PD765-7R5-00 PD765-6R5-10 Options Installed No options 24 V transmitter supply 2 relays 2 relays & 24 V transmitter supply 4-20 mA output 4-20 mA output & 24 V supply 4-20 mA output & dual 24 V supplies 2 relays & 4-20 mA output 2 relays, 4-20 mA output,
Trident Model PD765 Universal Input Meter Instruction Manual Table of Contents INTRODUCTION ------------------------------------------------------------ 2 ORDERING INFORMATION --------------------------------------------- 3 SPECIFICATIONS ---------------------------------------------------------- 7 General ------------------------------------------------------------------------------- 7 Process Input ---------------------------------------------------------------------- 8 Temperature Inputs --------------
Trident Model PD765 Universal Input Meter Instruction Manual Scaling the Meter (scal)---------------------------------------------------- 32 Calibrating the Meter (Cal) ------------------------------------------------- 34 Recalibrating Temperature Inputs (Cal) -------------------------------- 34 Recalibrating Process Inputs (ICal) ------------------------------------- 35 Setting the Relay Operation (rely) -------------------------------------- 36 Relay and Alarm Operation -----------------------------------
Trident Model PD765 Universal Input Meter Instruction Manual Table of Figures Figure 1. Panel Cutout and Mounting ............................................... 14 Figure 2. Labeling for 2 Relay, Analog Out, & 24 V Supply Model . 15 Figure 3. Power Connections ............................................................ 15 Figure 4. Transmitter Powered by Ext. Supply or Self-Powered .... 16 Figure 5. Transmitters Powered by Internal Supply (Optional) ...... 16 Figure 6. Voltage Input Connections ........
Trident Model PD765 Universal Input Meter Instruction Manual SPECIFICATIONS Except where noted all specifications apply to operation at +25°C. General DISPLAY Trident: 0.56" (14 mm), Trident X2: 1.20" (31 mm), Four digits (-1999 to 9999), automatic lead zero blanking. DISPLAY INTENSITY Eight intensity levels DISPLAY UPDATE RATE Process/RTD: 3.7-5/second Thermocouple: 1.8-2.
Trident Model PD765 Universal Input Meter Instruction Manual ENVIRONMENTAL Operating temperature range: 0 to 65°C Storage temperature range: -40 to 85°C Relative humidity: 0 to 90% non-condensing CONNECTIONS Removable screw terminal blocks accept 12 to 22 AWG wire, RJ11 for serial communication adapters ENCLOSURE 1/8 DIN, high impact plastic, UL 94V-0, color: gray MOUNTING 1/8 DIN panel cutout required. Two panel mounting bracket assemblies provided TIGHTENING TORQUE Screw terminal connectors: 4.
Trident Model PD765 Universal Input Meter Instruction Manual Temperature Inputs INPUTS Field selectable: type J, K, T, or E thermocouples; 100 Ω platinum RTD (0.00385 or 0.00392 curve) RESOLUTION 1° or 0.1° for all RTD inputs. 1° for all thermocouples. 1° or 0.1° for Type T thermocouple ACCURACY Input Type Range Accuracy Type J -58° to 1382° F -50° to 750°C ±2°F ±1°C Type K -58° to 2300° F -50° to 1260°C ±2°F ±1°C Type T -292° to 700° F -180° to 371°C ±2°F ±1°C Type T 0.1° Res -199.
Trident Model PD765 Universal Input Meter Instruction Manual Relays Option RATING 2 SPDT (Form C); rated 3 A @ 30 VDC or 3 A @ 250 VAC resistive load; 1/14 HP @ 125/250 VAC (50 watts) for inductive loads ELECTRICAL NOISE SUPPRESSION A suppressor (snubber) should be connected to each relay contact switching inductive loads to prevent disruption to the microprocessor’s operation. Recommended suppressor value: 0.01 µF/470 Ω, 250 VAC (PDX6901).
Trident Model PD765 Universal Input Meter Instruction Manual Isolated 4-20 mA Transmitter Output OUTPUT RANGE 1.00 to 23.00 mA typical CALIBRATION Factory calibrated for 4-20 mA SCALING RANGE 0.00 to 23.99 mA for any display range, see output range above ACCURACY ± 0.1% FS ± 0.004 mA TEMPERATURE DRIFT Note: Analog output drift is separate from input drift. 0.4 uA/°C from 0 to 65°C ambient ISOLATED One or two transmitter power supplies (Optional) TRANSMITTER P1: 24 VDC ± 10% @ 200 mA max.
Trident Model PD765 Universal Input Meter Instruction Manual COMPLIANCE INFORMATION Safety UL LISTED USA and Canada UL 508 Industrial Control Equipment UL FILE NUMBER E160849 FRONT PANEL UL Type 4X, NEMA 4X, IP65; panel gasket provided LOW VOLTAGE DIRECTIVE EN 61010-1:2010 Safety requirements for measurement, control, and laboratory use Electromagnetic Compatibility EMISSIONS Radiated Emissions AC Mains Conducted Emissions IMMUNITY RFI - Amplitude Modulated Electrical Fast Transients Electrostati
Trident Model PD765 Universal Input Meter Instruction Manual Note: Testing was conducted on Trident Meters installed through the covers of grounded metal enclosures with cable shields grounded at the point of entry representing installations designed to optimize EMC performance. Declaration of Conformity available at www.predig.com SAFETY INFORMATION ! CAUTION: Read complete instructions prior to installation and operation of the meter. WARNING: Risk of electric shock.
Trident Model PD765 Universal Input Meter Instruction Manual INSTALLATION There is no need to remove the meter from its case to complete the installation, wiring, and setup of the meter. Unpacking Remove the meter from box. Inspect the packaging and contents for damage. Report damages, if any, to the carrier. If any part is missing or the meter malfunctions, please contact your supplier or the factory for assistance. Panel Mounting • • • • • • Prepare a standard 1/8 DIN panel cutout – 3.622" x 1.
Trident Model PD765 Universal Input Meter Instruction Manual Connections All connections are made to removable screw terminal connectors located at the rear of the meter. Use copper wire with 60°C or 60/75°C insulation for all line voltage connections. Observe all safety regulations. Electrical wiring should be performed in accordance with all applicable national, state, and local codes to prevent damage to the meter and ensure personnel safety.
Trident Model PD765 Universal Input Meter Instruction Manual Signal Connections Signal connections are made to a five-terminal connector labeled SIGNAL on Figure 2. The COM (common) terminal is the return for all types of input signals. Current and Voltage Connections The following figures show examples for current and voltage connections. There are no switches or jumpers to set up for current and voltage inputs. Setup and programming is performed through the front panel buttons.
Trident Model PD765 Universal Input Meter V+ 1 SIGNAL CONNECTOR mA+ EXC T+ COM 2 3 + 4 V+ 5 SIGNAL CONNECTOR mA+ EXC T+ COM 1 - Instruction Manual 2 3 - Signal 4 5 24V OUT P+ 2 P1 + 3-Wire Voltage Transducer Voltage Signal Figure 6. Voltage Input Connections The meter is capable of accepting any voltage from -10 VDC to +10 VDC. Thermocouple and RTD Connections The following figures show examples for thermocouple and RTD connections.
Trident Model PD765 Universal Input Meter V+ 1 SIGNAL CONNECTOR mA+ EXC T+ 2 3 Instruction Manual COM 4 1 2 3 4 5 6 5 RTD TC Switch Position RTD Sensor Figure 8. Three-Wire RTD Input Connections The meter accepts two, three, or four-wire RTDs. The three-wire RTD connection has built-in lead wire compensation. V+ 1 SIGNAL CONNECTOR mA+ EXC T+ 2 3 COM 4 1 2 3 4 5 6 5 RTD TC RTD Sensor Switch Position Figure 9.
Trident Model PD765 Universal Input Meter V+ Instruction Manual SIGNAL CONNECTOR mA+ EXC T+ COM 1 2 3 4 1 2 3 4 5 6 5 RTD TC RTD Sensor Switch Position NC Figure 10. Four-Wire RTD Input Connections The four-wire RTD connection is similar to the three-wire. One of the leads of a four-wire RTD is not connected, and may be clipped off. The three-wire connection provides sufficient lead wire compensation to provide accurate readings even with long leads.
Trident Model PD765 Universal Input Meter Instruction Manual Switching Inductive Loads The use of suppressors (snubbers) is strongly recommended when switching inductive loads to prevent disrupting the microprocessor’s operation. The suppressors also prolong the life of the relay contacts. Suppression can be obtained with resistor-capacitor (RC) networks assembled by the user or purchased as complete assemblies.
Trident Model PD765 Universal Input Meter Instruction Manual 4-20 mA Output & Input Signal Connections Connections for the 4-20 mA transmitter output are made to the connector terminals labeled “mA OUT, I-, I+”. The 4-20 mA output may be powered from an internal power supply (optional) or from an external power supply. SIGNAL CONNECTOR V+ 1 mA+ EXC 2 3 mA OUT 24V OUT T+ COM I- I+ P1+ P1- P2+ P2- 4 5 6 5 4 3 2 1 - - + 2-Wire 4-20 mA Transmitter Remote Display, Chart Recorder, etc.
Trident Model PD765 Universal Input Meter Instruction Manual SETUP AND PROGRAMMING Programming From a PC with MeterView® Precision Digital’s free MeterView® software allows all PD765 Trident setup parameters to be programmed from a PC (requires PDC protocol selection) and to save the configuration settings to a file for reporting or programming other meters.
Trident Model PD765 Universal Input Meter Instruction Manual Front Panel Buttons and Status LED Indicators 9765 1 2 MENU Button Symbol • • • • • • S RESET R MAX ACK Description LED Status Menu 1 Alarm 1 Right arrow/Reset 2 Alarm 2 Up arrow/Max S Set point indicator Enter/Ack R Reset point indicator Press the Menu button to enter or exit the Programming Mode at any time. Press the Right arrow button to move to the next digit during digit programming.
Trident Model PD765 Universal Input Meter Instruction Manual Display Functions and Messages The meter displays various functions and messages during setup/programming and operation. The following table shows the displayed functions and messages with their action/setting description.
Trident Model PD765 Universal Input Meter Display Instruction Manual Parameter Action/Setting inp2 Input 2 Calibrate input 2 signal or program input 2 value dis2 Display 2 Program display 2 value err Error Error, calibration not successful, check signal Relay Enter the Relay menu RLY1 Relay1 Relay 1 setup Act1 Action1 Set relay 1 action (automatic, latching, etc.
Trident Model PD765 Universal Input Meter Display Instruction Manual Parameter Action/Setting DLY2 Delay2 Enter relay 2 time delay setup On2 On2 Set relay 2 On time delay OFF2 Off2 Set relay 2 Off time delay brek Break Set RTD/TC input break relay behavior Brk1 Relay 1 Break Set relay 1 input break relay behavior Off Off Set relay to non-alarm condition at break On On Set relay to alarm condition at break Brk2 Relay 2 Break Set relay 2 input break relay behavior Analog output En
Trident Model PD765 Universal Input Meter Instruction Manual Main Menu The main menu consists of the most commonly used functions: Setup, Program, and Password. • Press Menu button to enter Programming Mode then press Up arrow button to scroll main menu. Run Mode 9765 • • • setu pass Press Menu, at any time, to exit and return to Run Mode. Changes made to settings prior to pressing Enter/Ack are not saved. Changes to the settings are saved to memory only after pressing Enter/Ack.
Trident Model PD765 Universal Input Meter Instruction Manual Setting Up the Meter (setu) The Setup menu is used to select: 1. Input signal the meter will accept 2. Decimal point position for process inputs 3. Units (°F or °C) for temperature inputs 4. Relay operation 5. 4-20 mA analog output set up Press the Enter/Ack button to access any menu or press Up arrow button to scroll through choices. Press the Menu button to exit at any time. setu inpt prog dec.
Trident Model PD765 Universal Input Meter Instruction Manual Setting the Input Signal (inpt) Enter the Input menu to set up the meter to display current (4-20), voltage (0-10), thermocouple (tC), or RTD (rtd) inputs. The voltage input is capable of accepting any signal from -10 to +10 VDC. Select voltage input to accept 0-5, 1-5, 0-10, or ±10 VDC signals. The current input is capable of accepting any signal from -20 to 20 mA. Select current input to accept 0-20 or 4-20 mA signals.
Trident Model PD765 Universal Input Meter Instruction Manual Setting the Decimal Point (dc.pt) Decimal point for process inputs may be set with up to three decimal places or with no decimal point at all. Decimal point for RTD inputs may be set with 1 decimal place or none. Decimal point for thermocouple inputs is fixed. Pressing the Up arrow moves the decimal point one place to the right until no decimal point is displayed, then it moves to the leftmost position.
Trident Model PD765 Universal Input Meter Instruction Manual Programming the Meter (prog) It is very important to read the following information, before proceeding to program the meter: • There is no need to recalibrate the meter when first received from the factory. • The meter is factory calibrated prior to shipment, for all input types, in milliamps, volts, and degrees respectively. The calibration equipment is certified to NIST standards. • Use the Scale menu to scale process inputs (e.g. 4-20 mA).
Trident Model PD765 Universal Input Meter Instruction Manual Scaling the Meter (scal) The process inputs (4-20 mA and ±10 VDC) can be scaled to display the process in engineering units. A signal source is not needed to scale the meter; simply program the inputs and corresponding display values. Press Enter to Accept Setting scal inp1 Press Up to Set Digit Value Press Right to Select Next Digit Press Menu to Exit at any Time 04.00 dis1 00.
Trident Model PD765 Universal Input Meter Instruction Manual Error Message (Err) An error message indicates that the calibration or scaling process was not successful. After the error message is displayed, the meter reverts to input 1, allowing the appropriate input signals to be applied. The error message might be caused by any of the following conditions: 1. Input signal is not connected to the proper terminals or it is connected backwards. 2. Wrong signal selection in Setup menu. 3.
Trident Model PD765 Universal Input Meter Instruction Manual Calibrating the Meter (Cal) To scale the meter without a signal source refer to Scaling the Meter (scal), page 32. The meter can be calibrated to display the process in engineering units by applying the appropriate input signal and following the calibration procedure. The use of a calibrated signal source is strongly recommended to calibrate the meter. See Scaling the Meter for Button Functions Description Cal inp1 dis1 04.
Trident Model PD765 Universal Input Meter Instruction Manual Recommended Calibration Points To recalibrate the meter, it is recommended to use the Fahrenheit scale; this will give a greater degree of accuracy to the calibration. The scale can be changed to the Celsius scale after calibration is completed. The meter will display temperature accurately in any scale. The following table shows the recommended low and high calibration points for all types.
Trident Model PD765 Universal Input Meter Instruction Manual Setting the Relay Operation (rely) This menu allows you to set up the operation of the relays: 1. Relay action a. Automatic reset only (non-latching) b. Automatic + manual reset at any time (non-latching) c. Latching (manual reset only) d. Latching with Clear (manual reset only after alarm condition has cleared) e. Pump alternation control (automatic reset only) f. Off (relay and status LED disabled) 2. Set point 3. Reset point 4.
Trident Model PD765 Universal Input Meter Instruction Manual Setting the Relay Action The relays’ Action menu allows the user to set up the operation of the relays. The relays may be set up for any of the following modes of operation: 1. Automatic reset (non-latching) 2. Automatic + manual reset at any time (non-latching) 3. Latching (manual reset only, at any time) 4. Latching with Clear (manual reset only after alarm condition has cleared) 5. Pump alternation control (automatic reset only) 6.
Trident Model PD765 Universal Input Meter Instruction Manual Setting Fail-Safe Operation The fail-safe operation is set independently for each relay. Select on to enable or select off to disable fail-safe operation. FLSF Press Enter/Ack button to accept setting Press Menu button to exit at any time FLS1 on oFF FLS2 on oFF Programming Time Delay The On and Off time delays may be programmed for each relay between 0 and 199 seconds.
Trident Model PD765 Universal Input Meter Instruction Manual Setting Sensor Break Condition The sensor break relay condition may be programmed for each relay as On (alarm) or Off (non-alarm). The relays will enter these states when a sensor break is detected for RTD or thermocouple inputs. These settings have no effect when current or voltage inputs are selected.
Trident Model PD765 Universal Input Meter Instruction Manual Relay and Alarm Operation The following graphs illustrate the operation of the relays, status LEDs, and ACK button.
Trident Model PD765 Universal Input Meter Low Alarm Operation (Set < Reset) Instruction Manual Input Reset Set Relay LED energized on de-energized off Automatic (non-latching) Relay LED ACK pressed Automatic or Manual (non-latching) Relay LED ACK pressed Manual (latching) Relay LED ACK pressed Manual only after passing above Reset (latching with clear) For Manual reset mode, ACK can be pressed anytime to turn "off" relay.
Trident Model PD765 Universal Input Meter Instruction Manual Time Delay Operation The following graphs show the operation of the time delay function. Input Set Reset =Tdelay Relay * LED On Time Delay Input Set Reset =Tdelay Relay * LED Off Time Delay If the signal crosses the set point, the On time delay timer starts and the relay trips when the time delay has elapsed.
Trident Model PD765 Universal Input Meter Instruction Manual High Alarm with Fail-Safe Operation (Set > Reset) Input Set Reset Relay LED energized off de-energized on Automatic (non-latching) Relay LED ACK pressed Automatic or Manual (non-latching) Relay LED ACK pressed Manual (latching) Relay LED ACK pressed Manual only after passing below Reset (latching with clear) Fail-safe operation: relay coil is energized in non-alarm condition. In case of power failure, relay will go to alarm state.
Trident Model PD765 Universal Input Meter Instruction Manual Low Alarm with Fail-Safe Operation (Set < Reset) Input Reset Set Relay LED de-energized on energized off Automatic (non-latching) Relay LED ACK pressed Automatic or Manual (non-latching) Relay LED ACK pressed Manual (latching) Relay LED ACK pressed Manual only after passing above Reset (latching with clear) Fail-safe operation: relay coil is energized in non-alarm condition. In case of power failure, relay will go to alarm state.
Set Set Set Set 45 Pump 2 Pump 1 Relay1 Reset Relay2 Reset Relay2 Set Relay1 Set Pump 2 Pump 1 Relay2 Reset Relay1 Reset Relay2 Relay1 Pump 2 Pump 1 Relay1 & Relay2 Reset Relay2 Relay1 energized energized Input energized Input de-energized de-energized de-energized Input LEDs indicate the relay status Pump Alternation Control Operation Trident Model PD765 Universal Input Meter Instruction Manual
Trident Model PD765 Universal Input Meter Instruction Manual Scaling the 4-20 mA Analog Output (Aout) The 4-20 mA analog output can be scaled to provide a 4-20 mA signal for any display range selected. No equipment is needed to scale the analog output; simply program the display values to the corresponding mA output signal. The Analog Output menu is used to program: 1. 4-20 mA output based on display values 2.
Trident Model PD765 Universal Input Meter Instruction Manual Program the Sensor Break Output Value (SEbr) The sensor break value corresponds to the output signal generated when the meter detects a sensor break for thermocouple and RTD inputs. For example if there is an open thermocouple, the meter displays the message “open” and the analog output goes to the programmed sensor break value (e.g. 3.00 mA). The sensor break value can be programmed from 0.00 to 23.99. The typical output signal range is 1.
Trident Model PD765 Universal Input Meter Instruction Manual Setting Up the Password (pass) The Password menu is used to program a four-digit password to prevent unauthorized changes to the programmed parameter settings. Locking the Meter Enter the Password menu and program a four-digit password. For instructions on how to program numeric values see Setting Numeric Values, page 27. Run Mode pass unlC 0000 loCd Program Password Record the password for future reference.
Trident Model PD765 Universal Input Meter Instruction Manual Entering the correct four-digit number sets the password to 0000, disabling the protection. Changes to the programmed parameter settings are allowed only with the password set to 0000. If the password entered is incorrect, the meter displays LoCd (Locked) for about two seconds, then it returns to Run Mode. To try again, press Enter/Ack while the Locked message is displayed.
Trident Model PD765 Universal Input Meter Instruction Manual Advanced Features Menu To simplify the setup process, functions not needed for most applications are located in the Advanced features menu. Press the Right arrow and Menu button simultaneously to access the Advanced features of the meter. Hold the Menu button for approximately 3 seconds to access the Advanced features of the meter.
Trident Model PD765 Universal Input Meter Instruction Manual Advanced Features Menu & Display Messages Display Parameter Action/Setting adj Adjust Set offset adjustment for temperature, not available for process inputs fltr Filter Set noise filter value Bypass Set filter bypass value Serial Set serial communication parameters prot Protocol Enter the Protocol menu PDC PDC Select PDC protocol mbs Modbus Select Modbus protocol addr Address Set meter address baud Baud rate Select ba
Trident Model PD765 Universal Input Meter Display Instruction Manual Parameter Action/Setting Curr Current Calibrating current input I lo I low Calibrate low current input I Hi I high Calibrate high current input volt Volt Calibrating voltage input Vlo V low Calibrate low voltage input VHi V high Calibrate high voltage input Diagnostics Display parameter settings led LED Test display CJC CJC Display cold junction compensation voltage Cfg CFG Display meter configuration pts
Trident Model PD765 Universal Input Meter Instruction Manual Setting Numeric ValuesOffset Adjustment (Adj) This parameter allows the user to select an offset adjustment to the temperature being displayed. Offset adjustment values can be either positive or negative and can be any number within ±19.9°. The offset adjustment value is programmed through the Adjust menu. The offset adjustment feature can be useful to compensate for errors due to thermocouple junctions or excessive lead wire resistance in RTDs.
Trident Model PD765 Universal Input Meter Instruction Manual Noise Filter Bypass (byps) The meter can be programmed to filter small input changes, but allow larger input changes to be displayed immediately, by setting the bypass value accordingly. If the input signal goes beyond the bypass value, it will be displayed immediately with no averaging done on it. The noise filter bypass value may be set anywhere from 0.2 to 99.9.
Trident Model PD765 Universal Input Meter Instruction Manual Select Menu (SElc) The Select menu is used to select linear or square root function, display intensity, and low-flow cutoff. Selection for relay or analog output is a factory setting depending on the option installed. • • Output options are installed and set up at the factory. Changing the output selection will cause erroneous operation.
Trident Model PD765 Universal Input Meter Instruction Manual Low-Flow Cutoff (cutF) The low-flow cutoff feature allows the meter to be programmed so that the often-unsteady output from a differential pressure transmitter, at low flow rates, always displays zero on the meter. The cutoff value may be programmed from 0 to 9999. Below the cutoff value, the meter will display zero. Programming the cutoff value to zero disables the cutoff.
Trident Model PD765 Universal Input Meter Instruction Manual MeterView® Software Precision Digital’s MeterView® software allows the Trident to be programmed from a PC and to act as a data logger. MeterView® software allows all setup parameters to be saved to a file for reporting, restoring, or programming other meters. See Ordering Information, page 3 to order MeterView® software. Note: PDC protocol must be selected to communicate with MeterView®.
Trident Model PD765 Universal Input Meter Instruction Manual Meter Cloning Instructions NOTICE! 1. 2. 3. 4. 5. Do not connect the two meters to the same 4-20 mA loop while cloning. Internal calibration may be affected. Connect the two meters using cable assembly PDA7420 or equivalent (e.g. Digi-Key P/N H1663-07-ND). Cable should not exceed 7' (2.1 m). Power up both meters. Leave Clone meter in Run Mode. Enter the Advanced features menu of the Master meter, see Advanced Features Menu, page 50.
Trident Model PD765 Universal Input Meter Instruction Manual Internal Calibration (ICal) • • There is no need to recalibrate the meter when first received from the factory. The meter is factory calibrated prior to shipment, for all input types, in milliamps, volts, and degrees respectively. The calibration equipment is certified to NIST standards. The internal calibration allows the user to scale the meter without applying a signal. This menu is not available if the meter is set up for TC or RTD inputs.
Trident Model PD765 Universal Input Meter Instruction Manual Example for current input internal calibration: 6. The meter displays Low input current (I lo). Apply the low input signal and press Enter/Ack. The display flashes for a moment while meter is accepting the low input. 7. After the display stops flashing, a number is displayed with the leftmost digit brighter than the rest. The bright digit is the active digit that can be changed by pressing the Up arrow button.
Trident Model PD765 Universal Input Meter Tips: • • • Instruction Manual Low and high input signals can be any valid values within the range of the meter. Observe minimum input span requirements between input 1 and input 2. Low input must be less than high input signal. Error Message (Err) An error message indicates that the calibration or scaling process was not successful. After the error message is displayed, the meter reverts to input 1, allowing the appropriate input signals to be applied.
Trident Model PD765 Universal Input Meter Instruction Manual OPERATION For process inputs, the meter is capable of accepting positive and negative signals and displaying these signals in engineering units from -1999 to 9999 (e.g. a signal from -10 to +10 VDC could be displayed as -10.00 to 10.00). The temperature inputs are displayed according to the input type and temperature units (°F or °C) selected. RTD and Type T thermocouple inputs can be displayed with either 1° or 0.1° resolution.
Trident Model PD765 Universal Input Meter Instruction Manual Maximum/Minimum Readings The main function of the front panel buttons during operation is to display the maximum and minimum readings reached by the process or temperature inputs. Actual Reading 2468 Hi 9846 lo 200 10 Sec Time Out Press Up to Display and to Toggle Between Max & Min Press Enter to Hold Max/Min Press Right to Reset Max/Min Press Menu to Exit Max/Min 1. 2. 3. 4. 5.
Trident Model PD765 Universal Input Meter Instruction Manual MOUNTING DIMENSIONS 1.76" (45mm) 2.45" (62mm) 3.2" (81mm) 3.6" (91mm) 0.59" (15mm) Figure 17. Meter Dimensions – Side View 2.50" (64mm) 3.61" (92mm) 4.68" (119mm) Figure 18.
Trident Model PD765 Universal Input Meter Instruction Manual TROUBLESHOOTING For Interactive VirtualMeter Demo visit www.predig.com The rugged design and the user-friendly interface of the meter should make it unusual for the installer or operator to refer to this section of the manual. If the meter is not working as expected, refer to the Diagnostics menu and recommendations below.
Trident Model PD765 Universal Input Meter Instruction Manual Reset Meter to Factory Defaults When the parameters have been changed in a way that is difficult to determine what’s happening, it might be better to start the setup process from the factory defaults. Instructions to load factory defaults: 1. Enter the Advanced features menu. See Advanced Features Menu, page 50. 2. Press Up arrow to go to Diagnostics menu 3.
Trident Model PD765 Universal Input Meter Instruction Manual Factory Defaults & User Settings The following table shows the factory setting for most of the programmable parameters on the meter. Next to the factory setting, the user may record the new setting for the particular application. MeterView® software allows the saving of all meter parameters to a file for restoring meter settings, reporting, and copying settings to other meters.
Trident Model PD765 Universal Input Meter Instruction Manual Parameter Display Default Setting Password pass 0000 (unlocked) Adjust Adj 0.0° (temp only) Filter fltr 10 Bypass byps 0.2 Serial settings serl Protocol pdC PDC protocol Address addr 00 Baud rate baud 2400 Trans delay trde 10 ms Function Func Linear Cutoff value CutF 0.
Trident Model PD765 Universal Input Meter Instruction Manual Troubleshooting Tips Symptom Check/Action No display at all Not able to change setup or programming, LoCd is displayed Meter displays error message during calibration (err) Check power at power connector Meter is locked, enter correct four-digit password to unlock Check: 1. Signal connections 2. Input selected in Setup menu 3. Minimum input span requirements Check: 1. Input selected in Setup menu 2. TC/RTD Switch position 3.
Trident Model PD765 Universal Input Meter Instruction Manual QUICK INTERFACE REFERENCE GUIDE Run Mode A385 4-20 mA Input Display Max/Min A392 0-10 V Setup RTD Type J TC Type K Password Type T Locked Type T.0 Unlocked Type E TC or RTD? Yes No Decimal Point F dddd d . ddd F or C C dd . dd RTD or Type T No Yes TC or RTD? Yes No ddd .
Trident Model PD765 Universal Input Meter Pushbutton Menu Right Arrow Up Arrow Enter/Ack Instruction Manual Function Go to Programming Mode or leave Programming, Advanced Features, and Max/Min Modes. Move to next digit. Move to next selection or increment digit. Accept selection/value and move to next selection. Right Arrow & Menu simultaneously enters Advanced Features Max/Min Mode While in Run Mode, pressing Up Arrow will initiate Max/Min Mode.
Trident Model PD765 Universal Input Meter Instruction Manual How to Contact Precision Digital • For Technical Support please Call: (800) 610-5239 or (508) 655-7300 Fax: (508) 655-8990 Email: support@predig.com • For Sales Support or to place an order please Call: (800) 343-1001 or (508) 655-7300 Fax: (508) 655-8990 Email: sales@predig.com • For the latest version of this manual please visit www.predig.com • For Interactive VirtualMeter Demo please visit www.predig.
