Trident PD765-6R3-10, PD765-6R2-00, PD765-7R0-00, PD765-6R5-10, PD765-7R2-00 Instruction Manual
...
TRIDENT & TRIDENT X2
MODEL PD765
Instruction Manual
• Accepts Current, Voltage, TC, & RTD Inputs
• 4 Digit Display, 0.56" (14 mm) or 1.20" (31 mm)
• Linear or Square Root with Low-Flow Cutoff
• Operating temperature range of between -40°C and 65°C
• Maximum/Minimum Display
• Type 4X, NEMA 4X, IP65 Front
• Universal Power Supply 85-265 VAC
• 12-36 VDC/12-24 VAC Power Option
• Two Relays and 4-20 mA Output Option
• 24 VDC Transmitter Power Supply Options
• USB, RS-232, & RS-485
Serial Communication Adapters Options
• Free Modbus
®
RTU Protocol
• Copy Meter Settings to Other Meters
• Free MeterView
®
Software - Configuration & Data Acquisition
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Trident Model PD765 Universal Input Meter Instruction Manual
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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. All other trademarks mentioned in this document are
the property of their respective owners.
© 2011-2016 Precision Digital Corporation. All rights reserved.
INTRODUCTION
The Trident is a multipurpose, easy to use digital panel meter. It accepts
current, voltage, thermocouple, and RTD signals. The four front panel
buttons make the setup and programming an easy task.
The isolated 24 VDC transmitter power (optional) can be used to power
the input transmitter, the 4-20 mA output, or other devices.
The two relays (optional) can be used for alarm indication or process control
applications, such as pump alternation control.
Two relays and a 4-20 mA output are available together in the same meter.
The 4-20 mA isolated output and Modbus
®
RTU serial communication
options make the Trident an excellent addition to any system.
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Trident Model PD765 Universal Input Meter Instruction Manual
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ORDERING INFORMATION
Trident
85-265 VAC
Model
12-36 VDC
Model
Options Installed
PD765-6R0-00 PD765-7R0-00 No options
PD765-6R0-10 24 V transmitter supply
PD765-6R2-00 PD765-7R2-00 2 relays
PD765-6R2-10 2 relays & 24 V transmitter supply
PD765-6R3-00 PD765-7R3-00 4-20 mA output
PD765-6R3-10 4-20 mA output & 24 V supply
PD765-6R3-20 4-20 mA output & dual 24 V supplies
PD765-7R5-00 2 relays & 4-20 mA output
PD765-6R5-10 2 relays, 4-20 mA output, & 24 V supply
Trident X2
85-265 VAC
Model
12-36 VDC
Model
Options Installed
PD765-6X0-00 PD765-7X0-00 No options
PD765-6X0-10 24 V transmitter supply
PD765-6X2-00 PD765-7X2-00 2 relays
PD765-6X2-10 2 relays & 24 V transmitter supply
PD765-6X3-00 PD765-7X3-00 4-20 mA output
PD765-6X3-10 4-20 mA output & 24 V supply
PD765-6X3-20 4-20 mA output & dual 24 V supplies
PD765-7X5-00 2 relays & 4-20 mA output
PD765-6X5-10 2 relays, 4-20 mA output, & 24 V supply
Accessories
Model Description
PDA7232 RS-232 serial adapter with PDA7420 included
PDA7420 Trident meter copy cable, 7' (2.1 m)
PDA7422 RS-485 serial adapter with PDA7420 included
PDA7485-I RS-232 to RS-485 isolated converter
PDA7485-N RS-232 to RS-485 non-isolated converter
PDA8485-I USB to RS-422/485 isolated converter
PDA8485-N USB to RS-422/485 non-isolated converter
PDA8006 USB Serial Adapter
MeterView® Free MeterView® software download at www.predig.com
Enclosures NEMA 4 & explosion-proof enclosures – See Web site.
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Trident Model PD765 Universal Input Meter Instruction Manual
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Table of Contents
INTRODUCTION ------------------------------------------------------------ 2
ORDERING INFORMATION --------------------------------------------- 3
SPECIFICATIONS ---------------------------------------------------------- 7
General ------------------------------------------------------------------------------- 7
Process Input ---------------------------------------------------------------------- 8
Temperature Inputs -------------------------------------------------------------- 9
Relays Option -------------------------------------------------------------------- 10
Isolated 4-20 mA Transmitter Output ------------------------------------ 11
Serial Communications ------------------------------------------------------- 11
COMPLIANCE INFORMATION ---------------------------------------- 12
Safety ------------------------------------------------------------------------------- 12
Electromagnetic Compatibility --------------------------------------------- 12
SAFETY INFORMATION ------------------------------------------------ 13
INSTALLATION ------------------------------------------------------------ 14
Unpacking ------------------------------------------------------------------------- 14
Panel Mounting ------------------------------------------------------------------ 14
Connections ---------------------------------------------------------------------- 15
Connector Labeling ---------------------------------------------------------- 15
Power Connections ---------------------------------------------------------- 16
Signal Connections ---------------------------------------------------------- 16
Serial Communication ------------------------------------------------------- 20
Relays and 24 V Output Connections ----------------------------------- 20
Switching Inductive Loads -------------------------------------------------- 20
4-20 mA Output & Input Signal Connections -------------------------- 22
SETUP AND PROGRAMMING ---------------------------------------- 23
Front Panel Buttons and Status LED Indicators --------------------- 24
Display Functions and Messages ----------------------------------------- 25
Main Menu ------------------------------------------------------------------------ 28
Setting Numeric Values ------------------------------------------------------ 28
Setting Up the Meter (setu) ------------------------------------------------- 29
Setting the Input Signal (inpt) -------------------------------------------- 30
Setting the Decimal Point (dc.pt) ----------------------------------------- 31
Setting the Temperature Scale (F C) ---------------------------------- 31
Programming the Meter (prog) ------------------------------------------- 32
Scaling the Meter (scal) ---------------------------------------------------- 33
Calibrating the Meter (Cal) ------------------------------------------------- 35
Recalibrating Temperature Inputs (Cal) -------------------------------- 35
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Recalibrating Process Inputs (ICal) ------------------------------------- 36
Setting the Relay Operation (rely) -------------------------------------- 37
Relay and Alarm Operation ------------------------------------------------ 41
Pump Alternation Control Operation ------------------------------------- 46
Scaling the 4-20 mA Analog Output (Aout) ---------------------------- 47
Program the Sensor Break Output Value (SEbr) --------------------- 48
Analog Output when Display is Out of Range ------------------------- 48
Setting Up the Password (pass) ------------------------------------------- 49
Locking the Meter ------------------------------------------------------------ 49
Unlocking the Meter ---------------------------------------------------------- 49
Advanced Features Menu ---------------------------------------------------- 50
Advanced Features Menu & Display Messages ---------------------- 51
Offset Adjustment (Adj) ----------------------------------------------------- 53
Noise Filter (fltr) ------------------------------------------------------------ 53
Noise Filter Bypass (byps) ------------------------------------------------- 54
Serial Communications (serl) -------------------------------------------- 54
Protocol Selection Menu (Prot) ------------------------------------------ 54
Select Menu (SElc) ---------------------------------------------------------- 55
Linear or Square Root Function (linr or Sqrt) ---------------------- 55
Low-Flow Cutoff (cutF) ----------------------------------------------------- 56
Display Intensity (inty) ----------------------------------------------------- 56
Meter Copy Function (Copy) ----------------------------------------------- 57
Internal Calibration (ICal) -------------------------------------------------- 59
OPERATION ---------------------------------------------------------------- 62
Front Panel Buttons Operation -------------------------------------------- 62
Maximum/Minimum Readings ---------------------------------------------- 63
MOUNTING DIMENSIONS ---------------------------------------------- 64
TROUBLESHOOTING ---------------------------------------------------- 65
Diagnostics Menu (diag) ----------------------------------------------------- 65
Determining Software Version -------------------------------------------- 65
Reset Meter to Factory Defaults ------------------------------------------- 66
Factory Defaults & User Settings ----------------------------------------- 67
Troubleshooting Tips --------------------------------------------------------- 69
QUICK INTERFACE REFERENCE GUIDE ------------------------- 70
EU DECLARATION OF CONFORMITY ----------------------------- 73
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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. Labeling for Analog Out & Two 24 V Supply Model ........ 15
Figure 4. Power Connections ............................................................ 16
Figure 5. Transmitter Powered by Ext. Supply or Self-Powered .... 16
Figure 6. Transmitters Powered by Internal Supply (Optional) ...... 17
Figure 7. Voltage Input Connections ................................................ 17
Figure 8. Thermocouple Input Connections .................................... 18
Figure 9. Three-Wire RTD Input Connections .................................. 18
Figure 10. Two-Wire RTD Input Connections ................................... 19
Figure 11. Four-Wire RTD Input Connections .................................. 19
Figure 12. Relay & 24 V Output Connections ................................... 20
Figure 13. AC and DC Loads Protection ........................................... 20
Figure 14. Low Voltage DC Loads Protection .................................. 21
Figure 15. 4-20 mA Output & Input Signal Powered by Meter ........ 22
Figure 16. 4-20 mA Output Powered Externally ............................... 22
Figure 17. Meter Copy Connection ................................................... 57
Figure 18. Meter Dimensions – Side View ........................................ 64
Figure 19. Case Dimensions – Top View .......................................... 64
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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: 1.8-2.5/second
OVERRANGE
Display flashes
9999
UNDERRANGE
Display flashes
-1999
PROGRAMMING
METHODS
Four front panel buttons, PC and MeterView® software, or
cloning using Copy function
NOISE FILTER Programmable from 2 to 199 (0 will disable filter)
RECALIBRATION All ranges are calibrated at the factory. Recalibration is
recommended at least every 12 months.
MAX/MIN
DISPLAY
Max/min readings reached by the process are stored until
reset by the user or until power to the meter is turned off.
PASSWORD Programmable password restricts modification of settings.
NON-VOLATILE
MEMORY
All programmed settings are stored in non-volatile memory
for a minimum of ten years if power is lost.
POWER
OPTIONS
85-265 VAC, 50/60 Hz
90-265 VDC, 20 W max
or 12-36 VDC, 12-24 VAC, 6 W max
See table for power consumption
(*X: number depends on option)
Model Watts
PD765-6RX-0* 8
PD765-6RX-1, 2* 20
PD765-7RX-0* 6
FUSE Required fuse: UL Recognized, 5 A max, slow blow
Up to 6 meters may share one 5 A fuse
ISOLATED
TRANSMITTER
POWER SUPPLY
One or two transmitter power supplies (Optional)
P or P1: 24 VDC ± 10% @ 200 mA max. (-1 option)
P1 & P2: 24 VDC ± 10% @ 200 mA & 40 mA max. (-2 option)
NORMAL MODE
REJECTION
64 dB at 50/60 Hz
ISOLATION 4 kV input/output-to-power line
500 V input-to-output or output-to-P1/P2 supplies
-6R5 & -6X5 models only: 100 V output-to-24 VDC supply
OVERVOLTAGE
CATEGORY
Installation Overvoltage Category II:
Local level with smaller transient overvoltages than Installation Overvoltage Category III.
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ENVIRONMENTAL Operating temperature range: -40 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: 5 lb-in (0.56 Nm)
OVERALL
DIMENSIONS
2.45" x 4.68" x 4.19" (62 mm x 119 mm x 106 mm)
(H x W x D)
WEIGHT 9.5 oz. (269 g) (including options)
WARRANTY 3 years parts & labor
Process Input
INPUTS Field selectable:
±20 mADC (0-20, 4-20 mA) and ±10 VDC (0-5, 1-5, 0-10 V)
ACCURACY ±0.05% of span ±1 count, square root: 10-100% FS
FUNCTION Linear or square root
LOW-FLOW
CUTOFF
0-9999 (0 disables cutoff function)
TEMPERATURE
DRIFT
0 to 65°C ambient -40 to 0°C ambient
Current: ±0.20% FS (50 PPM/°C)
Voltage: ±0.02% FS (1.7 PPM/°C)
Current: ±0.80% FS
Voltage: ±0.06% FS
DECIMAL POINT Up to three decimal places for process inputs:
d.ddd, dd.dd, ddd.d, or dddd
CALIBRATION
RANGE
An Error message will appear if input 1 and input 2 signals
are too close together.
Input Range Minimum Span
Input 1 & Input 2
4-20 mA 0.40 mA
±10 V
0.20 V
INPUT
IMPEDANCE
Voltage ranges: greater than 1 MΩ
Current ranges: 50 - 100 Ω
(depending on resettable fuse impedance)
INPUT
OVERLOAD
Current input protected by resettable fuse.
Fuse resets automatically after fault is removed.
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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
(0 - 65 C)
Accuracy
(-40 - 0 C)
Type J
-58° to 1382° F
-50° to 750°C
±2°F
±1°C
±5°F
±3°C
Type K
-58° to 2300° F
-50° to 1260°C
±2°F
±1°C
±4°F
±2°C
Type T
-292° to 700° F
-180° to 371°C
±2°F
±1°C
±13°F
±7°C
Type T
0.1° Res
-199.9° to 700.0° F
-180.0° to 371.0°C
±1.8°F
±1.0°C
±13°F
±7.2°C
Type E
-58° to 1578° F
-50° to 870°C
±2°F
±1°C
±11°F
±6°C
100 Ω RTD
-328° to 1382°F
-200° to 750°C
±1°F
±1°C
±5°F
±3°C
COLD
JUNCTION
REFERENCE
Automatic, fixed, no user calibration needed
OFFSET
ADJUSTMENT
Programmable to ±19.9°. This parameter allows the user to
apply an offset value to the temperature being displayed.
INPUT
IMPEDANCE
Greater than 100 kΩ
SENSOR BREAK
DETECTION
Open TC or RTD sensor indicated by display flashing oPEn.
All relays and alarm status LEDs go to alarm or non-alarm
state, programmable for each relay individually.
Analog output goes to the programmed sensor break value.
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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).
DEADBAND 0-100% of full scale, user selectable
HIGH OR LOW
ALARM
User may program any alarm for high or low trip point.
RELAY
OPERATION
Automatic (non-latching)
Latching
Pump alternation control
RELAY RESET User selectable via front panel buttons or PC
Automatic reset only (non-latching)
Automatic + manual reset at any time (non-latching)
Manual reset only, at any time (latching)
Manual reset only after alarm condition has cleared (latching)
Automatic reset: Relays will automatically reset when the in-
put passes the reset point.
Manual reset: Front panel ACK button. Pressing ACK re-
sets all manually resettable relays.
TIME DELAY 0 to 199 seconds, on and off delays
Programmable and independent for each relay
FAIL-SAFE
OPERATION
Programmable
Independent for each relay
AUTO
INITIALIZATION
When power is applied to the meter, relays will reflect the
state of the input to the meter.
Fail-safe operation: relay coil is energized in non-alarm condition. In
case of power failure, relay will go to alarm state.
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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
0.4 uA/°C from -40 to 65°C ambient
Note: Analog output drift is separate from input drift.
ISOLATED
TRANSMITTER
POWER SUPPLY
One or two transmitter power supplies (Optional)
P1: 24 VDC ± 10% @ 200 mA max. (-1 option)
P1 & P2: 24 VDC ± 10% @ 200 mA & 40 mA max. (-2 option)
EXTERNAL LOOP
POWER SUPPLY
35 VDC maximum
OUTPUT LOOP
RESISTANCE
Power supply Minimum Maximum
24 VDC
10 Ω 700 Ω
35 VDC (external)
100 Ω 1200 Ω
Serial Communications
METER
ADDRESS
PDC protocol: 0 - 99
Modbus protocol: 1 - 247
BAUD RATE 300 – 19,200 bps
TRANSMIT
TIME DELAY
Programmable between 0 and 199 ms
DATA 8 bit (1 start bit, 1 stop bit)
PARITY None (1 or 2 stop bits), even, or odd
(Modbus only; PDC protocol does not use parity)
BYTE-TO-BYTE
TIMEOUT
0.01 – 2.54 sec (Modbus only)
TURN AROUND
DELAY
Less than 2 ms (fixed)
Refer to PDC and Modbus Serial Communication Protocol manuals for
details. These can be downloaded from: www.predig.com.
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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
EN 55011:2009 + A1:2010
Group 1 Class A ISM emissions requirements
Radiated
Emissions
Class A
AC Mains
Conducted
Emissions
Class A
IMMUNITY
EN 61326-1:2013
Measurement, control, and laboratory equipment
EN 61000-6-2:2005
EMC heavy industrial generic immunity standard
RFI - Amplitude
Modulated
80 -1000 MHz 10 V/m 80% AM (1 kHz)
1.4 - 2.0 GHz 3 V/m 80% AM (1 kHz)
2.0 - 2.7 GHz 1 V/m 80% AM (1 kHz)
Electrical Fast
Transients
±2kV AC mains, ±1kV other
Electrostatic
Discharge
±4kV contact, ±8kV air
RFI - Conducted
10V, 0.15-80 MHz, 1kHz 80% AM
AC Surge
±2kV Common, ±1kV Differential
Surge
1KV (CM)
Power-Frequency
Magnetic Field
30 A/m 70%V for 0.5 period
Voltage Dips
40%V for 5 & 50 periods
70%V for 25 periods
Voltage
Interruptions
<5%V for 250 periods
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Trident Model PD765 Universal Input Meter Instruction Manual
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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.
WARNING
Hazardous voltages exist within enclosure. Installation and service should be performed only by
trained service personnel.
!
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Trident Model PD765 Universal Input Meter Instruction Manual
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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 1.772" (92 mm
x 45 mm). Refer to MOUNTING DIMENSIONS, page 64 for more
details.
• Clearance: allow at least 4" (102 mm) behind the panel for wiring.
• Panel thickness: 0.04" - 0.25" (1.0 mm - 6.4 mm).
Recommended minimum panel thickness to maintain Type 4X
rating: 0.06" (1.5 mm) steel panel, 0.16" (4.1 mm) plastic panel.
• Remove the two mounting brackets provided with the meter (back-off
the two screws so that there is ¼" (6.4 mm) or less through the
bracket. Slide the bracket toward the front of the case and remove).
• Insert meter into the panel cutout.
• Install mounting brackets and tighten the screws against the panel.
To achieve a proper seal, tighten the mounting bracket screws
evenly until meter is snug to the panel along its short side. DO NOT
OVER TIGHTEN, as the rear of the panel may be damaged.
Figure 1. Panel Cutout and Mounting
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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.
Connector Labeling
The connectors label, affixed to the meter, shows the location of all connectors available with requested configuration. It also identifies the location of the RTD/TC selector switch. The below two images are common
connector configurations for the PD765. Note that the connector in the
upper left of the diagram has two different configurations based on the
model.
Figure 2. Labeling for 2 Relay, Analog Out, & 24 V Supply Model
Figure 3. Labeling for Analog Out & Two 24 V Supply Model
DW2206
POWER
SIGNAL
EXC T+ V+ mA+ COM
RTD
SWITCH
TC
SERIAL
TC
RTD
1 2 3 4 5 6
COM NONO NC NC COM
RELAY2 RELAY1
4
3
6 5
2 1
3 41 2 5
2 1
+
I
-
I
+
mA OUT
6 5
24V OUT
2 1
P+ P-
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Trident Model PD765 Universal Input Meter Instruction Manual
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Power Connections
Power connections are made to a two-terminal connector labeled
POWER on Figure 2. The meter will operate regardless of DC polarity
connection. The + and - symbols are only a suggested wiring convention.
Figure 4. Power Connections
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.
Figure 5. Transmitter Powered by Ext. Supply or Self-Powered
12
AC or DC
POWER
Required External Fuse:
5 A max, Slow Blow
POWER CONNECTOR
+-
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Figure 6. Transmitters Powered by Internal Supply (Optional)
The current input is protected against current overload by a resettable
fuse. The display may or may not show a fault condition depending on
the nature of the overload.
The fuse limits the current to a safe level when it detects a fault condition, and automatically resets itself when the fault condition is removed.
Figure 7. Voltage Input Connections
The meter is capable of accepting any voltage from -10 VDC to +10 VDC.
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Thermocouple and RTD Connections
The following figures show examples for thermocouple and RTD connections.
The RTD/TC selector switch must be set to the proper position for the
meter to accept the selected temperature input.
The input type is selected using the Setup menu.
Selected thermocouple input must correspond to thermocouple sensor
and wire type used.
Figure 8. Thermocouple Input Connections
Figure 9. 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.
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Trident Model PD765 Universal Input Meter Instruction Manual
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Figure 10. Two-Wire RTD Input Connections
Lead wire compensation for two-wire RTDs can be applied using the
Adjust menu. See Offset Adjustment (Adj), page 53.
Figure 11. 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.
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Serial Communication
Serial communication connection is made to an RJ11 connector labeled
SERIAL on Figure 2. Use PDA7232 for RS-232 interfacing.
Use PDA7422 for RS-485 interfacing.
Use PDA7420 for meter-to-meter interfacing for cloning purposes (i.e.
copying programmed settings from one meter to other meters).
Relays and 24 V Output Connections
Relay connections are made to a six-terminal connector labeled
RELAY1, RELAY2 on Figure 2. The COM (common) terminals of the relays should not be confused with the COM (common) terminal of the
SIGNAL connector. The 24 VDC output is available at the connector labeled 24V OUT, next to the relays connector.
Figure 12. Relay & 24 V Output Connections
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. Refer to the following circuits for RC network assembly and installation:
Figure 13. AC and DC Loads Protection
C
R
C
R
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Trident Model PD765 Universal Input Meter Instruction Manual
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Choose R and C as follows:
R: 0.5 to 1 Ω for each volt across the contacts
C: 0.5 to 1 µF for each amp through closed contacts
Notes:
1. Inductive relay rating is 1/14 HP (50 W) at 115/230 VAC
2. Use capacitors rated for 250 VAC.
3. RC networks may affect load release time of solenoid loads. Check to confirm proper operation.
4. Install the RC network at the meter's relay screw terminals. An RC network
may also be installed across the load. Experiment for best results.
Figure 14. Low Voltage DC Loads Protection
RC Networks Available from Precision Digital
RC networks are available from Precision Digital and should be applied to each
relay contact switching an inductive load. Part number: PDX6901.
Note:
Relays are de-rated to 1/14th HP (50 watts) with an inductive load.
Use a diode with a reverse
breakdown voltage two to
three times the circuit voltage and forward current at
least as large as the load
current.
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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.
Figure 15. 4-20 mA Output & Input Signal Powered by Meter
Figure 16. 4-20 mA Output Powered Externally
COM
SIGNAL CONNECTOR
mA+
21 354
V+ T+
EXC
2-Wire
4-20 mA
Transmitter
-
+
I-
mA OUT
P2-P1+
45 312
P2+
P1-
24V OUT
6
I+
Remote Display,
Chart Recorder,
etc.
+
-
External
Power
Supply
-
+
I-
mA OUT
56
I+
Remote Display,
Chart Recorder,
etc.
+
-
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Trident Model PD765 Universal Input Meter Instruction Manual
23
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. And since the serial adapter is an external
device, one serial adapter can program an infinite number of meters!
The MeterView screen shot above shows how the input is selected. Notice there are tabs for Scaling, Relays/Alarms, Advanced, and Factory
Values.
• There is no need to recalibrate the meter when first received from the fac-
tory.
• 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.
Overview
There are no jumpers involved in the setup process of the meter. The
RTD/TC selector switch, located between the SIGNAL and SERIAL connectors, must be set accordingly for the meter to accept RTD or thermocouple inputs, Figure 2.
Setup and programming is done through the front panel buttons.
After power and signal connections have been completed and verified,
apply power to the meter.
For
QUICK INTERFACE REFERENCE
GUIDE
go to page 70
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Trident Model PD765 Universal Input Meter Instruction Manual
24
Front Panel Buttons and Status LED Indicators
Button
Symbol
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.
•
Press the Up arrow button to scroll through the menus, decimal
point, or to increment the value of a digit.
•
Press the
Enter/Ack
button to access a menu or to accept a setting.
•
Press the
Right
arrow and
Menu
button simultaneously or hold the
Menu
button for approximately 3 seconds to access the
Advanced
Features Menu
of the meter.
For Interactive Virtual
Meter Demo visit
tvm.predig.com
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Trident Model PD765 Universal Input Meter Instruction Manual
25
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.
Display Parameter Action/Setting
setu
Setup
Enter Setup menu
inpt
Input
Enter Input menu
4-20
4-20 mA
Set meter for 4-20 mA input
0-10
0-10 VDC
Set meter for ±10 VDC input
rtd
RTD
Set meter for RTD input
a385
Alpha 385
Set α = 0.00385 European curve 100Ω
RTD
A392
Alpha 392
Set α = 0.00392 American curve 100Ω RTD
tC
TC
Set meter for TC input
0 J
0 J
Type J
1 k
1 K
Type K
2 T
2 T
Type T
3 t.0
3 T.0
Type T, 0.1° resolution
4 E
4 E
Type E
f C
°
F or °C
Set temperature scale
°F
°
F
Set meter to Fahrenheit
°C
°
C
Set meter to Celsius
dec.p
Decimal point
Set decimal point
prog
Program
Enter the Program menu
scal
Scale
Enter the Scale menu
Cal
Calibrate
Enter the Calibrate menu
inp1
Input 1
Calibrate input 1 signal or program input 1
value
dis1
Display 1
Program display 1 value
inp2
Input 2
Calibrate input 2 signal or program input 2
value
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Trident Model PD765 Universal Input Meter Instruction Manual
26
Display Parameter Action/Setting
dis2
Display 2
Program display 2 value
err
Error
Error, calibration not successful, check signal
RELY
Relay
Enter the Relay menu
RLY1
Relay 1
Relay 1 setup
Act1
Action 1
Set relay 1 action (automatic, latching, etc.)
Auto
Automatic
Set relay for automatic reset
A-m
Auto-manual
Set relay for automatic + manual reset any
time
LtCH
Latching
Set relay for latching operation
L-CL
Latchingcleared
Set relay for latching operation with manual
reset only after alarm condition has cleared
Altr
Alternate
Set relays for pump alternation control
oFF
Off
Disable relay and front panel status LEDs
Disable relay’s fail-safe operation
Set1
Set 1
Program set point 1
rSt1
Reset 1
Program reset point 1
RLY2
Relay 2
Setup relay 2
Act2
Action 2
Set relay 2 action (automatic, latching, etc.)
Set2
Set 2
Program set point 2
RSt2
Reset 2
Program reset point 2
FLSF
Fail-safe
Enter Fail-safe menu
FLS1
Fail-safe1
Set relay 1 fail-safe operation
on
On
Enable fail-safe operation
off
Off
Disable fail-safe operation
FLS2
Fail-safe2
Set relay 2 fail-safe operation
DLAY
Delay
Enter Time Delay menu
DLY1
Delay 1
Enter relay 1 time delay setup
On1
On 1
Set relay 1 On time delay
OFF1
Off 1
Set relay 1 Off time delay
DLY2
Delay 2
Enter relay 2 time delay setup
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Trident Model PD765 Universal Input Meter Instruction Manual
27
Display Parameter Action/Setting
On2
On 2
Set relay 2 On time delay
OFF2
Off 2
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
Aout
Analog output
Enter the Analog output menu
Scal
Scale
Enter the Scale menu
Dis1
Display 1
Program display 1 value
out1
Output 1
Program output 1 value (e.g. 4 mA)
Dis2
Display 2
Program display 2 value
out2
Output 2
Program output 2 value (e.g. 20 mA)
SEbr
Sensor break
Program TC or RTD sensor break value for
analog out
pass
Password
Enter the Password menu
unlC
Unlocked
Program password to lock meter
loCd
Locked
Enter password to unlock meter
9999
-1999
open
Flashing display
Overrange condition
Underrange condition
Open TC or RTD sensor
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Trident Model PD765 Universal Input Meter Instruction Manual
28
Main Menu
The main menu consists of the most commonly used functions:
Setup
and
Password
.
•
Press
Menu
button to enter Programming Mode then press Up ar-
row button to scroll main menu.
•
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
.
•
The display moves to the next menu every time a setting is ac-
cepted by pressing
Enter/Ack
.
Setting Numeric Values
The numeric values are set using the
Right
and Up arrow buttons.
Press
Right
arrow to select next digit and
Up
arrow to increment digit
value.
The digit being changed is displayed brighter than the rest.
Press the
Enter/Ack
button, at any time, to accept a setting or
Menu
button to exit without saving changes.
The decimal point is set using the
Up
arrow button in the
Setup-decimal
point
menu.
9765 setu pass
Run
Mode
0 4.00 04.00 0 5. 00
Increment Digit
Value
Next
Setting
Select Next Digit
A
ccept Setting
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Trident Model PD765 Universal Input Meter Instruction Manual
29
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 but-
ton to scroll through choices. Press the
Menu
button to exit at any time.
R TD
TC
Note:
Selecting R TD o
r
TC mode from
the Input menu will include the
Fahrenheit/Celsius menu in the
setup menu structure. RTD will
allow the selection of a decimal
point location after this menu and
TC has a fixed decimal point loca
tion and will not allow the selection of a decimal point location.
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Trident Model PD765 Universal Input Meter Instruction Manual
30
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.
If RTD is selected, the display shows A385 or A392. Select the coefficient to match the RTD sensor, either 0.00385 (A385, European curve)
or 0.00392 (A392, American curve). The display then shows the decimal
point menu, DEc.P. Select the decimal point resolution as shown on page
31.
If TC is selected, scroll through the thermocouple types and select the
type matching the TC sensor.
The input signal must be connected to the appropriate input terminals
and the RTD/TC selector switch must be set, see Figure 8 on page 18.
For thermocouple inputs, allow at least 30 minutes warm-up
time for meter to reach specified accuracy.
inpt
4-20 0-10 rtd tC
a385
a392
0 j
1 k
2 t
3 t.0
4 e
Press Enter/Ack to
Make Selections
Press Up Arrow
to Scroll Through
Choices
Press Menu to
Exit at any Time
J
K
T
T.0
E
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Trident Model PD765 Universal Input Meter Instruction Manual
31
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, it then moves to the leftmost position.
Setting the Temperature Scale (F C)
The meter can be set to display temperature in degrees Fahrenheit or
Celsius.
Press Up arrow to change selection.
Press Enter/Ack to accept.
dec.p
dddd
Next
Select Decimal
Point
Previous
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Trident Model PD765 Universal Input Meter Instruction Manual
32
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). A cali-
brated signal source is not needed to scale the meter.
• For thermocouple and RTDs, just connect the sensor to the proper
terminals and turn the power on. No calibration needed! (when
the meter is first received from the factory).
The Program menu contains the Calibrate and the Scale menus.
Process inputs may be calibrated or scaled to any display within the
range of the meter.
Additional parameters, not needed for most applications, are programmed with the Advanced Features menu, see Advanced Features
Menu, page 50.
prog ScAl
CAL
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Trident Model PD765 Universal Input Meter Instruction Manual
33
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.
For instructions on how to program
numeric values see Setting Numeric
Values, page 28.
Note:
The Scale menu is not available for temperature inputs.
dis1 00.0
Press Enter to Accept Setting
inp2
Scale
Input 2
inp1
Set Input 1
Value
scal
04.00
Set Display 1
Value
Press Up to Set Digit Value
Press Right to Select Next Digit
Press Menu to Exit at any Time
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Trident Model PD765 Universal Input Meter Instruction Manual
34
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. Minimum input span requirements not maintained.
4. Input 1 signal inadvertently applied to calibrate input 2.
Minimum Input Span
The minimum input span is the minimum difference between input 1 and input 2 signals required to complete the calibration or scaling of the meter.
Input range Input 1 & input 2 span
4-20 mA 0.40 mA
±10 VDC
0.20 VDC
TC
100°F (56°C)
RTD
50°F (28°C)
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Trident Model PD765 Universal Input Meter Instruction Manual
35
Calibrating the Meter (Cal)
To scale the meter without a signal
source, refer to Scaling the Meter
(scal), page 33.
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.
Recalibrating Temperature Inputs (Cal)
Remember, the meter is calibrated at the factory prior to shipment. Recalibration is recommended at least every twelve months.
The Calibration (CAL) menu is used to recalibrate the thermocouple and
RTD inputs.
Allow at least 30 minutes warm-up time
before performing recalibration proce-
dure to ensure specified accuracy.
inp1 dis1 04.00
Set Display 1
Value
inp2
Calibrate
Input 2
Cal
Display
Flashes
Accepting
Input
See Scaling the Meter for Button
Functions Description
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Trident Model PD765 Universal Input Meter Instruction Manual
36
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.
Type of input
Input 1
(Low)
Input 2
(High)
Check
(Middle)
Type J T/C
32
°F 1182°F 600°F
Type K T/C
32
°F 1893°F 960°F
Type T T/C
32
°F 693°F 360°F
Type T T/C
32.0
°F 693.0°F 360.0°F
Type E T/C
32
°F 1652°F 840°F
100 Ω RTD
(0.00385)
32°F
100
Ω
1148°F
320.12
Ω
590
°F
215.61
Ω
100 Ω RTD
(0.00392)
32°F
100
Ω
1127°F
320.89
Ω
580
°F
215.87
Ω
Recalibration Procedure for Temperature Inputs
1. Connect signal to the meter using the appropriate wire (e.g. type J
thermocouple wire to recalibrate type J input), see page 18.
2. Set up the meter to accept the selected input (e.g. type J T/C), see
page 30.
3. Set up the meter to display temperature in degrees Fahrenheit, see
page 31.
4. Apply signal corresponding to input 1 (32°F) and program display 1 to
32, see page 35.
5. Apply signal corresponding to input 2 (1182°F for type J) and program
display 2 accordingly, see page 35.
6. After the meter accepts input 2, the display flashes the message
CJr
that indicates the meter is sensing the cold junction reference. This
completes the recalibration procedure for the selected input.
Recalibrating Process Inputs (ICal)
The Internal Calibration (ICAL) menu, located in the Advanced features
menu, is used to recalibrate the current and voltage inputs. Recalibration is recommended at least every twelve months.
Refer to Internal Calibration (ICal), page 59 for instructions.
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Trident Model PD765 Universal Input Meter Instruction Manual
37
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 condi-
tion has cleared)
e. Pump alternation control (automatic reset only)
f. Off (relay and status LED disabled)
2. Set point
3. Reset point
4. Fail-safe operation
a. On (enabled)
b. Off (disabled)
5. Time delay
a. On delay (0-199 seconds)
b. Off delay (0-199 seconds)
6. Break Condition Behavior
a. Off (non-alarm condition)
b. On (alarm condition)
Refer to page 25 for a
description of Display
Functions and Messages
rLY1 rLY2
FLSF
rELY
dLAY
Act1
SEt1
rSt1
FLS1
FLS2
dLy1
dLY2
Same
Functions as
Relay 1
From Setup
Menu
Press Enter/Ack button to access any menu
Press Menu button to exit at any time
brek
brk1
brk2
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Trident Model PD765 Universal Input Meter Instruction Manual
38
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. Off (relay and status LED disabled)
The following graphic shows relay 1 action setup; relay 2 is set up in a
similar fashion.
Programming Set and Reset Points
High alarm indication: program set point above reset point.
Low alarm indication: program set point below reset point.
The deadband is determined by the difference between set and reset
points. Minimum deadband is one display count. If set and reset points
are programmed the same, relay will reset one count below set point.
Auto A-m
LtCH
Act1
L-CL
From Relay 1
Menu
Press
Enter/Ack
button to accept setting
Press
Menu
button to exit at any time
ALtroFF
SEt1
rSt1
Program Set
Point
Program Reset
Point
Quick Set Points
Press Up arrow and Menu
at the same time to access
set/reset points quickly.
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Trident Model PD765 Universal Input Meter Instruction Manual
39
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.
Programming Time Delay
The On and Off time delays may be programmed for each relay between 0 and 199 seconds. The relays will transfer only after the condition has been maintained for the corresponding time delay.
The On time delay is associated with the set point.
The Off time delay is associated with the reset point.
FLSF
FLS1
FLS2
on oFF
Press
Enter/Ack
button to accept setting
Press
Menu
button to exit at any time
on oFF
Program On
Time Delay
Program Off
Time Delay
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Trident Model PD765 Universal Input Meter Instruction Manual
40
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.
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Trident Model PD765 Universal Input Meter Instruction Manual
41
Relay and Alarm Operation
The following graphs illustrate the operation of the relays, status LEDs,
and ACK button.
High Alarm Operation (Set > Reset)
For Manual reset mode, ACK can be pressed anytime to turn "off" relay.
For relay to turn back "on", signal must go below set point, and then go
above it.
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Trident Model PD765 Universal Input Meter Instruction Manual
42
Low Alarm Operation (Set < Reset)
For Manual reset mode, ACK can be pressed anytime to turn "off" relay.
For relay to turn back "on", signal must go above set point, and then go
below it.
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Trident Model PD765 Universal Input Meter Instruction Manual
43
Time Delay Operation
The following graphs show the operation of the time delay function.
If the signal crosses the set point, the
On
time delay timer starts and the
relay trips when the time delay has elapsed. If the signal drops below
the set point (high alarm) before the time delay has elapsed, the
On
time delay timer resets and the relay does not change state. The same
principle applies to the
Off
time delay.
* Note:
The LED is not affected by Time Delay when
“Automatic or
Manual”
reset mode is selected. Rather the LED follows the set
and reset points.
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Trident Model PD765 Universal Input Meter Instruction Manual
44
High Alarm with Fail-Safe Operation (Set > Reset)
Fail-safe operation:
relay coil is energized in non-alarm condition. In
case of power failure, relay will go to alarm state.
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Trident Model PD765 Universal Input Meter Instruction Manual
45
Low Alarm with Fail-Safe Operation (Set < Reset)
Fail-safe operation:
relay coil is energized in non-alarm condition. In
case of power failure, relay will go to alarm state.
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Trident Model PD765 Universal Input Meter Instruction Manual
46
Pump Alternation Control Operation
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Trident Model PD765 Universal Input Meter Instruction Manual
47
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.
Depending on the version of meter purchased, the
Analog Output menu
may not appear in the
Setup menu. This menu is enabled or disabled at
the factory via the
Advanced Features menu. For more information on
the Advanced Features Menu see page 50.
The
Analog Output menu is used to program:
1. 4-20 mA output based on display values
2. Sensor break value in mA
For instructions on how to program
numeric values see
Setting Numeric
Values
, page 28.
out1 04.00
Press Enter to Accept Setting
dis2
Scale
Output 2
dis1
Set Display 1
Value
scal
00.00
Set Output 1
Value
Press Up to Set Digit Value
Press Right to Select Next Digit
Press Menu to Exit at any Time
Aout
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Trident Model PD765 Universal Input Meter Instruction Manual
48
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 1.00 to 23.00 mA (e.g. If sensor break
value is programmed to 0.00, the actual output will not be greater than
1.00 mA).
Analog Output when Display is Out of Range
The analog output reflects the display out of range conditions as follows:
Input Condition Display Analog Output
Underrange Flashing -1999 3.00 mA
Overrange Flashing 9999 21.00 mA
Open TC or RTD Flashing open Sensor break value
sEbr
Set Sensor
Break Value
scal
03.00
Aout
Program
Menu
Press Enter to Accept Setting
Press Up to Set Digit Value
Press Right to Select Next Digit
Press Menu to Exit at any Time
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Trident Model PD765 Universal Input Meter Instruction Manual
49
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 28.
Record the password for future reference. If appropriate, it may be recorded in the space provided.
Model:
Serial Number:
Password: __ __ __ __
Unlocking the Meter
If the meter is password protected, the correct password must be entered in order to make changes to the parameter settings.
pass unlC 0000
Program
Password
loCd
Run Mode
pass loCd 0000
Enter
Password
unlC
Run Mode
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Trident Model PD765 Universal Input Meter Instruction Manual
50
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.
Forgot the Password?
The password may be disabled by the following
procedure:
1. Note display reading prior to pressing the Menu
button. Ignore decimal point and sign.
2. Access the
Password menu, add 2 to the noted
reading and enter that number as the password
(e.g. display reading = -1.23, password = 0125).
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 or hold the
Menu button for approximately 3 seconds to access the
Advanced Fea-
tures Menu
of the meter.
Copy
I Cal
Press Enter/Ack to Access
Menu or to Accept Setting
diag
byps
fltr
serl
Press Up to Scroll Menu and
to Increment Digit Value
Press Right to Select Next Digit
Press Menu to Exit at any Time
adj
Press Simultaneously
*
* Available for temperature inputs only
**
* * Available for process inputs only
SELc
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Trident Model PD765 Universal Input Meter Instruction Manual
51
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
byps
Bypass
Set filter bypass value
serl
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 baud rate
trdE
Transmit delay
Set transmit delay for serial communication
prty
Parity
Select none, even, or odd (Modbus only)
tbyt
Byte-to-byte
Program byte-to-byte timeout
(silent time – Modbus only)
Copy
Copy
Enter copy function
send
Send
Send meter settings to another meter
done
Done
Copy function completed
Selc
Select
Enter the Select menu (function, cutoff, out)
Func
Function
Select linear or square root function
Linr
Linear
Set meter for linear function
Sqrt
Square root
Set meter for square root extraction
cutF
Cutoff
Set low-flow cutoff
out
Output
Set meter for either relay or analog output
(factory set only – only included in certain model
s
Aout
Analog output
Set meter for analog output option
rEly
Relay
Set meter for relay option
Aout
Analog output
Enable or disable analog output
(factory set only – only included in certain model
s
Yes
Yes
Enable analog output
no
No
Disable analog output
Inty
Intensity
Select display intensity
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Trident Model PD765 Universal Input Meter Instruction Manual
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Display Parameter Action/Setting
ICal
Initial calibration
Enter initial calibration for process inputs
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
diag
Diagnostics
Display parameter settings
led
LED
Test display
CJC
CJC
Display cold junction compensation voltage
Cfg
CFG
Display meter configuration
pts
Points
Display calibration points for process inputs
RELY
Relays
Display relay settings
Aout
Analog output
Display analog output settings
GoFF
Gain/offset
Display gain and offset for process inputs
SErL
Serial
Display serial communication settings
Info
Information
Display software version and S/N information
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Offset 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.
The offset adjustment value is automatically reset to zero whenever the
type of temperature sensor is changed (
i.e. Thermocouple type or RTD
curve).
Celsius/Fahrenheit conversion of the offset adjustment value is auto-
matic, see note 2 below for important limitations.
Notes:
1. Offset adjustment is available only when TC or RTD input is selected.
2. If adjustment value is greater than 11
°C and the temperature
scale is changed to Fahrenheit, the maximum applied adjustment will be 19.9
°F.
Noise Filter (fltr)
Most applications do not require changing this parameter. It is intended
to help attain a steady display with an unsteady (noisy) input signal.
The field selectable noise filter averages any minor or quick changes in
the input signal and displays the reading with greater stability.
Increasing the filter value will help stabilize the display, however this will
reduce the display response to changes on the input signal.
The filter level may be set anywhere from 2 to 199.
Setting filter value to zero disables filter function, and bypass setting be-
comes irrelevant.
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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. It
corresponds to percentage of full scale for process inputs and to degrees Fahrenheit for temperature inputs.
Increasing the bypass value may slow down the display response to
changes on the input signal.
Serial Communications (serl)
The meter is equipped with serial communications capability as a standard feature using PDC Serial Communication Protocol. The Modbus
RTU protocol is included on all models after 5/1/2010. To communicate
with a computer or other data terminal equipment, an RS-232 or RS-485
adapter option is required; see
Ordering Information on page 3 for de-
tails.
When using more than one meter in a multi-drop mode, each meter
must be provided with its own unique address. The address may be programmed from 00 to 99 for PDC protocol and from 1 to 247 for Modbus
protocol. The transmit delay may be set between 0 and 199 ms (see Serial Communication Adapter manual for more details).
The Trident can also be connected directly to another Trident meter
through a cable assembly (PDA7420). This allows the user to copy all
the settings from one meter to another, using the
Copy function.
Protocol Selection Menu (Prot)
The Protocol selection menu is used to select either the PDC or the
Modbus protocol.
Serl Prot
Addr
bAud trde
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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 selec-
tion will cause erroneous operation.
Linear or Square Root Function (linr or Sqrt)
Meters are set up at the factory for linear function. The linear function
provides a display that is linear with respect to the input signal.
The square root function is used to linearize the signal from a differential
pressure transmitter and display flow rate in engineering units.
Note:
Depending on meter model, the Select menu
will display either out or Aout. In either case,
the output selection menu is for factory use
only. Do not attempt to change output selection.
Linr
Func
Sqrt
SELc
Advanced
Features
Press Enter to Accept Setting
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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.
Display Intensity (inty)
The Display Intensity function allows the selection of eight levels of intensity for various lighting conditions.
Next
Menu Item
inty
Select Display
Intensity Level
Func
int3
SELc
Press Enter to Accept Setting
Press Up to Select Value
Press Menu to Exit at any Time
Advanced
Features
Next
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Trident Model PD765 Universal Input Meter Instruction Manual
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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®.
Meter Copy Function (Copy)
The Copy function is used to copy (or clone) all the settings from one
meter to other meters requiring exactly the same setup and programming (
i.e. type of input, scaling, decimal point, filter, bypass, etc.).
Figure 17. Meter Copy Connection
Copy Function Requirements
To successfully copy settings from one meter to another, both meters must have:
1. Same software version
2. Same baud rate setting
3. PDC protocol selected
See Determining Software Version,
page 65 for instructions.
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Meter Cloning Instructions
NOTICE!
Do not connect the two meters to
the same 4-20 mA loop while
cloning. Internal calibration may
be affected.
1. 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).
2. Power up both meters. Leave Clone meter in Run Mode.
3. Enter the
Advanced Features Menu of the Master meter, see Ad-
vanced Features Menu
, page 50.
4. Scroll to
Copy function using Up arrow button then press
Enter/Ack.
5. The meter displays the message
Send. Press Enter/Ack, the dis-
play flashes while sending data. The message
done is displayed
when copying is completed.
6. The Clone meter displays the memory address being programmed
then the message
done when copying is completed. The meter ini-
tializes and returns to Run Mode using the same settings as the
Master.
7. If meter to be cloned does not respond to the data being sent, refer
to
Copy Function Requirements above.
Copy send
Advanced
Features
done
Display
Flashes While
Sending
Press
Menu
to Exit and
Return to Run Mode
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Trident Model PD765 Universal Input Meter Instruction Manual
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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.
The use of calibrated signal sources is necessary to perform the internal
calibration of the meter.
Check calibration of the meter at least every 12 months. Each input type
must be recalibrated separately, if meter will be used with all input
types.
Notes:
• If meter is in operation and it is intended to
accept only one input type (e.g. 4-20 mA),
recalibration of other inputs is not necessary.
• Allow the meter to warm up for at least
15 minutes before performing the internal calibration procedure.
The
Internal calibration menu is part of the Advanced Features Menu.
1. Press the Right arrow
and Menu button simultaneously or hold the
Menu button for approximately 3 seconds to access the
Advanced
Features Menu of the meter.
2. Press the
Up arrow button to scroll to the Internal calibration menu
and press
Enter/Ack.
3. The meter displays either current (
Curr) or voltage (volt), accord-
ing to the meter input setup. Press
Enter/Ack to start the calibra-
tion process.
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Trident Model PD765 Universal Input Meter Instruction Manual
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Example for current input internal calibration:
4. 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.
5. 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. Press the
Right arrow button to move to the next digit.
6. Set the display value to correspond to the input signal being calibrated.
7. The display moves to the high input calibration (
I Hi). Apply the
high input signal and press
Enter/Ack.
8. Set the display for the high input calibration in the same way as it
was set for the low input calibration.
For instructions on how to pro-
gram numeric values see Set-
ting Numeric Values
, page 28.
The graphic above shows the calibration of the current input. The voltage input is calibrated in a similar way.
I lo 04.00
Set Display Value
for Low Input
I Hi
Calibrate
High Input
Curr
Display
Flashes
While
Accepting
Input
I Cal
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Trident Model PD765 Universal Input Meter Instruction Manual
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Tips:
•
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.
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. Minimum input span requirements not maintained.
Minimum Input Span
The minimum input span is the minimum difference between input 1 and input 2 signals required to complete the calibration or scaling of the meter.
Input range Input 1 & input 2 span
4-20 mA 0.40 mA
±10 VDC
0.20 VDC
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Trident Model PD765 Universal Input Meter Instruction Manual
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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 in-
puts can be displayed with either 1
°
or 0.1° resolution.
Front Panel Buttons Operation
Button
Symbol
Description
Press to enter or exit Programming Mode,
view settings, or exit Max/Min readings
Hold to enter Advanced features menu.
Press to reset Max/Min readings
Press to display Max/Min readings
alternately
Press to display Max/Min reading
indefinitely while displaying Max/Min
Press ACK to acknowledge relays
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Trident Model PD765 Universal Input Meter Instruction Manual
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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.
1. Press
Up arrow/Max button to display maximum reading since the
last reset/power-up.
2. Press
Up arrow/Max again to display the minimum reading since
the last reset/power-up.
3. Press
Enter/Ack to hold Max/Min display reading, the meter will
continue to track new Max/Min readings.
4. If
Enter/Ack is not pressed, the Max/Min display reading will time
out after ten seconds and the meter will return to display the actual
reading.
5. Press
Right arrow/Reset button to reset Max/Min while reading is
being displayed. Max/Min display readings are reset to actual
reading.
2468 Hi lo
Actual
Reading
9846 200
Press
Enter
to Hold Max/Min
Press
Up
to Display and to
Toggle Between Max & Min
Press
Right
to Reset Max/Min
Press
Menu
to Exit Max/Min
10 Sec Time Out
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Trident Model PD765 Universal Input Meter Instruction Manual
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MOUNTING DIMENSIONS
Figure 18. Meter Dimensions – Side View
Figure 19. Case Dimensions – Top View
1.76"
(45mm)
0.59"
(15mm)
3.2"
(81mm)
2.45"
(62mm)
3.6"
(91mm)
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Trident Model PD765 Universal Input Meter Instruction Manual
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TROUBLESHOOTING
For an Interactive Virtual
Meter Demo visit
tvm.predig.com
Due to the many features and functions of the meter, it’s possible that
the setup of the meter does not agree with what an operator expects to
see. If the meter is not working as expected, refer to the
Diagnostics
menu and consult the recommendations described below.
Diagnostics Menu (diag)
The Diagnostics menu is located in the Advanced Features Menu, to access
Diagnostics menu see Advanced Features Menu, page 50.
It provides an easy way to view the programmed parameter settings for
troubleshooting purposes. Press the
Enter/Ack button to view the set-
tings and the
Menu button to exit at any time.
For a description of the diagnostics messages
see Advanced Features
Menu & Display Messages, page 51.
Determining Software Version
To determine the software version of a meter:
1. Go to the
Diagnostics menu (diAG) and press Enter/Ack but-
ton.
2. Press
Up arrow/Max button and scroll to Information menu
(
Info).
3. Press
Enter/Ack to access the software number (SFT), version
(
UER). Write down the information as it is displayed. Continue
pressing
Enter/Ack until all the information is displayed.
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Trident Model PD765 Universal Input Meter Instruction Manual
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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. Press and hold
Right arrow/Reset for five seconds, press
Enter/Ack when display flashes reset.
Note: If
Enter/Ack is not pressed within three seconds, display re-
turns to
Diagnostics menu.
4. The meter goes through an initialization sequence (same as on
power-up), and loads the factory default settings.
rset
diag
Press Simultaneously
Meter Re-
Initializes
Press and Hold
for 5 Sec
Flashing
Display
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Trident Model PD765 Universal Input Meter Instruction Manual
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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.
Model: ______________ S/N: _______________ Date: _________
Parameter Display Default Setting User
Setting
Input type
inpt
4-20 mA
Decimal point
dd.dd
2 places
Programming
prog
Input 1
InP1
4.00 mA
Display 1
Dis1
4.00
Input 2
InP2
20.00 mA
Display 2
Dis2
20.00
Relay 1
Rly1
Action 1
Act1
Automatic
Set 1
Set1
7.00
Reset 1
RSt1
6.00
Relay 2
Rly2
Action 2
Act2
Automatic
Set 2
Set2
10.00
Reset 2
RSt2
9.00
Fail-safe
flsf
Fail-safe 1
Fls1
Off
Fail-safe 2
Fls2
Off
Time delay
dlay
On delay 1
On1
0 sec
Off delay 1
Off1
0 sec
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Trident Model PD765 Universal Input Meter Instruction Manual
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Parameter Display Default Setting User
Setting
On delay 2
On2
0 sec
Off delay 2
Off2
0 sec
Break 1
Brk1
Off
Break 2
Brk2
Off
Password
pass
0000 (unlocked)
Advanced
Features
N/A
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
0.00 (disabled)
Output option
out/Aout
Factory set only
Display intensity
inty
Level 8
Modbus defaults N/A
Address
addr
247
Parity
prty
Even
Byte-to-byte timeout*
tbyt
0.01 sec
*Note:
The byte-to-byte timeout setting might be updated automatically depending on the baud rate selected and the previous timeout setting. The
minimum timeout allowed is saved to memory if a lower value is entered
(e.g. If user enters 0.00 with a baud rate of 300, 0.06 is saved).
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Trident Model PD765 Universal Input Meter Instruction Manual
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Troubleshooting Tips
Symptom Check/Action
No display at all
Check power at power connector
Not able to change setup or programming,
LoCd is displayed
Meter is locked, enter correct four-digit
password to unlock
Meter displays error message during calibration (
err)
Check:
1. Signal connections
2. Input selected in
Setup menu
3. Minimum input span requirements
Meter displays
• open
• 9999
• -1999
• Displays negative number,
not responding to RTD.
Check:
1. Input selected in
Setup menu
2. TC/RTD Switch position
3. Corresponding signal at Signal
connector
Display alternates between
1.
Hi and a number
2.
Lo and a number
Press
Menu to exit Max/Min
display readings.
Display response is too slow
Check filter and bypass values
Inaccurate temperature reading
Check:
1. Temperature units (
°F or °C)
2. TC type or RTD curve selected
3. Offset adjustment
4. TC wire used
5. Calibration
If the display locks up or the meter
does not respond at all
Cycle the power to restart the
microprocessor.
Relay operation is reversed
Check:
1. Fail-safe in
Setup menu
2. Wiring of relay contacts
Relay and status LED do not
respond to signal
Check:
1. Relay action in
Setup menu
2. Set and reset points
Meter not communicating with MeterView
®
or other programs
Check:
1. Serial adapter and cable
2. Serial protocol selected
3. Meter address and baud rate
4. MeterView address and baud rate
Other symptoms not described
above
Call Technical Support for
assistance.
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Trident Model PD765 Universal Input Meter Instruction Manual
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QUICK INTERFACE REFERENCE GUIDE
Run Mode
Setup
Password
Display
Max/Min
Input
4-20 mA
0-10 V
RTD
TC
Decimal
Point
dddd
d . ddd
dd . dd
ddd . d
A385
A392
Type J
Type K
Type T
Type T.0
Type E
F
C
F or C
To Program
Locked Unlocked
TC or RTD?
Yes No
Relays
Relay 1
Relay 2
Failsafe
Delays
Action
Set point
Reset point
Auto
Auto & Manual
Latch
Latch w/Clear
Pump Alt
Off
To
Set point
Failsafe 1
Failsafe 2
To Delays
Delay 1
Delay 2
On
Off
Analog
output
Scale
Sensor
break
To Password
RTD or Type T
No Yes
Calibrate
Scale
TC or RTD?
Yes No
Program
To Relays
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Trident Model PD765 Universal Input Meter Instruction Manual
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Right Arrow & Menu
(or hold Menu for 3 sec)
Pushbutton Function
Menu Go to Programming Mode or leave Programming, Advanced
Features, and Max/Min Modes.
Right Arrow Move to next digit.
Up Arrow Move to next selection or increment digit.
Enter/Ack 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. Up Arrow
toggles between Max & Min displays, and Right Arrow resets the Max/Min to the
current value. Press Menu or wait 10 seconds to return to Run Mode. Pressing
Enter/Ack will disable the 10 second timeout and continuously display Max or Min.
Press Right arrow and Menu
to access Advanced Features
Menu
When the meter is locked, Adjust,
Filter and Bypass can only display
their settings, and the Copy and
ICAL functions are not available.
Adjust
Filter
Bypass
Serial
Copy Send
TC or RTD?
Yes No
TC or RTD?
Yes No
Initial
Calibrate
Diagnostics
Select
Function
Cutoff
Output
Linear
Sq. Root
Address
TX Delay
Baud
Protocol
Parity
Modbus
PDC
Byte-to-byte
timeout
Modbus?
No Yes
Intensity
Program
Run
Max &
Min
Advanced
Features
Up Arrow
Menu
Menu
Menu
Menu
Operational Modes
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