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Features
- 4-20 mA, ± 10 V, TC & RTD Inputs
- NEMA 4X, IP65 Front
- Shallow Depth Case 3.6" Behind Panel
- Universal Power Supply 85-265 VAC
- Two Relays Option with Alternation & Time
Delays
- 4-20 mA Analog Output Option
- 24 VDC @ 200 mA Transmitter Power Option
- RS-232, RS-422/485 Serial Communication
Options
- Modbus® RTU Option & Free LabVIEW™ Driver
- Sunlight Readable Display
- 3 Year Warranty
- Free MeterView Software Download
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| The
Model PD765 Trident digital panel meter is one of
the most versatile digital panel meters on the
market and will satisfy a wide variety of
applications. The Trident can be field programmed to
accept process voltage (0-5V, 1-5V, etc) and current
(4-20 mA) inputs, 100 Ohm RTDs, and the four most
common thermocouples. It is housed in a
shallow-depth, 1/8 DIN enclosure that features a
NEMA 4X front panel and convenient mounting
hardware. There are two power options for the
Trident: 85 to 265 VAC or 12-36 VDC and it can
provide 24 VDC to power the transmitter if needed.
Programming and setup can be performed with the four
front panel pushbuttons, free MeterView software, or
using the Copy function.
Take a close look at the bullets to the right
of the above picture and you'll see why the
Trident is one of the most popular digital panel
meters on the market. Spend a few minutes on our
VirtualMeter demo and you'll be hooked on the
Trident!
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EASY SETUP AND PROGRAMMING
The Trident is easily setup and programmed using the
simple four-button programming method. There is only one
switch on the entire meter, no jumpers, and no need to
ever open the case. The meter can also be programmed
using a PC and Precision Digital’s free MeterView
software or “cloned” with the Copy function.
Front Panel
Buttons
User
Friendly Menu Structure
To simplify programming, the Trident’s setup
functions are divided into two menus. A main menu
handles all the basic setup functions. An advanced
features menu handles the special functions not
commonly used.
Try the VirtualMeter at www.predig.com for an
interactive demonstration of how the Trident is
programmed.
- 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, accept a setting, or to acknowledge
relays.
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Setup Menu
•Select
input
•Decimal
point
•Degrees F or
C |
Program Menu
•Scale
meter without signal
•Calibrate
meter with signal |
Password Menu
•Prevent changes
to meter settings |
Setting
Numeric Values
The numeric values are set using the Right
and Up arrow buttons. Press the Right
arrow button to select next digit and the Up
arrow button 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.
Main Menu
The main menu consists of the three most commonly
used functions: Setup, Program, and Password.
Press Menu button to enter the Programming Mode then
press Up arrow button to scroll main menu.
The Setup menu is used to select the
input signal, decimal point, °F or °C, and relay
setup. The Program menu is used to
calibrate or scale the meter. The Password
menu is used to program a password.
The display moves to the next menu after the
Enter/ACK
button is pressed.
Advanced
Features Menu
To simplify the setup process, the features least
used in most applications are located in the
Advanced Features menu.
To access the Advanced Features menu, Press and
hold the Right arrow button first and then
press the Menu buttons for three seconds.
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Offset Adjustment ( )
This function allows the user to select an offset
adjustment to the temperature being displayed. This
value can be either positive or negative and can be
any number within +/-19.9°.Noise
Noise
Filter ( )
This function averages any minor or quick changes
in the input signal and displays the reading with
greater stability.
Noise
Filter Bypass ( )
The meter can be programmed to filter small input
changes (with noise filter function), but allow
larger input changes to be displayed immediately by
setting the noise filter bypass function
accordingly. If the change in input signal exceeds
the bypass value, no filtering will occur and the
new value will be displayed immediately.
Serial
Communication ( )
This menu is used to program the serial
communication parameters such as the address for
each meter when used in a multi-drop mode.
The meter is equipped with serial communications
capability as a standard feature using PDC Serial
Communication Protocol. The Modbus RTU Protocol is
optional and can be purchased at any time.
Protocol
Selection Menu ( )
The Protocol selection menu is used to select
either the PDC or the Modbus protocol. If Modbus
option is purchased separately, it is necessary to
enter a four-digit code to enable the Modbus
protocol.
Meter Copy
( )
The Copy function is used to copy (or clone) all
the settings from one Trident meter to other Trident
meters in less than 10 seconds. The Copy function is
a standard feature on all meters. The Copy feature
does not require a serial communication adapter, it
only requires the optional cable assembly (PDA7420),
see the ordering information for complete details.
Select
Menu ( )
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.
Display
Intensity Menu ( )
The Display Intensity function allows the
selection of eight user selectable levels of
intensity to help compensate for various lighting
conditions, including direct sunlight. Sunlight
Readable Display is a Trident Standard Feature!
Diagnostic
Menu ( )
The Diagnostic function aids in troubleshooting by
providing a convenient way to review setup and
programming parameters.
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VirtualMeter Demo Lets You Test Drive Before You
Buy!
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VERSATILE OPERATION
Look to the Trident meter for the key features and
options you want and don’t worry about getting
bogged down in a confusing array of things you don’t
need. The Trident’s Max/Min function, 2 relays, and
serial communication options provide all the utility
you need to handle all the common applications.
Powerful Relay Functionality
All relay functions are set up from the front
panel or from a PC running MeterView® or LabView™
software.
- Automatic reset only
- Automatic or manual reset
- Latching or non-latching relays
- Pump alternation control
- On and off time delays from 0 to 199 seconds
- Fail-safe operation is user selectable
Maximum/Minimum Readings
To display the maximum and minimum readings since
the last reset/power-up, use the Up arrow/Max button
Serial Communication Adapters
 Serial
Communication Adapters and Converters
A wide variety of serial communication adapters
and converters are available for the Trident meter.
A serial adapter and Precision Digital's free
MeterView software allows the Trident to be
programmed from a computer and to connect to a PC
for data acquisition. For a complete listing of
Precision Digital's serial adapters, click here
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FREE METERVIEW® SOFTWARE
Precision Digital’s MeterView® software allows the
Trident to be programmed from a PC and to act as a
data logger.
- Program or read meter settings
- Save meter profiles for cloning
- Use profiles for reporting
Digital Panel Meters make a great front end to a
PC-based data acquisition system. They are easy to
set up, can be used for a wide range of inputs, will
power the transmitter, and best of all provide a
local display of the process. Precision Digital has
the perfect package with its Trident Digital Panel
Meters, a wide selection of serial adapters and
converters and MeterView software.
One of the great things about the Trident meter
is that serial adapters are external to the
Trident meter. That means you buy just one
adapter and use it with the free MeterView
software to program as many Tridents as you
want.
To learn more about MeterView software,
click here.
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Remote
Meter Programming
MeterView® software allows all PD765 Trident setup
parameters to be programmed from a PC and to save
the configuration settings to a file for reporting
or programming other meters.
Data
Acquisition
MeterView® software provides a convenient way to
collect the data generated by the Trident meters.
The user can select the logging time interval and
the engineering units that will be displayed on the
computer screen. Data is written to a file that
could then be imported into a spreadsheet or other
application.
Data
Logging up to 100 Trident Meters
- Save data to a file
- Monitor up to 10 meters per tab
- 10 tabs = 100 meter total capacity
- Acknowledge
Sample
File Generated by MeterView®
Great for tank level
monitoring!
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PROCESS & TEMPERATURE INPUTS
The Trident is factory calibrated to accept 4-20
mA, ±10 VDC, type J, K, T, or E thermocouples and
100Ω platinum RTDs. Process inputs can be scaled
with or without applying an input for virtually any
engineering units. Temperature inputs can be
programmed to display in degrees Fahrenheit or
Celsius and the type K thermocouple can display up
to 2300 °F.
Current &
Voltage Inputs
Setting up the meter to accept a current or
voltage input could not be easier. All setup is
performed with the front panel buttons and there are
no switches or jumpers to deal with.
Transmitter Powered by
External Supply
Transmitter Powered by
Internal Supply (Optional)
Current
Overload Protection
To protect the instrument from unexpected current
overload the current input circuit contains a
resettable fuse. 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.
Thermocouple & RTD Inputs
Setting up the Trident to accept a thermocouple or
RTD input is simply a matter of setting a switch at
the rear of the case and selecting the input type
from the menu.
The meter accepts J, K, T, or E type thermocouples
as well as two, three, or four-wire 100 . platinum
RTDs.
Thermocouple and RTD Inputs
4-20 mA Output & Input Signal
Powered by Meter
Connectors
Location
Rear View
Meter with Relays Option
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Engraved
Plastic Labels
Optional custom engraved plastic labels are the
perfect solution for identifying both the enclosure
and each individual meter. Whether the meters are
mounted in one of our enclosures or installed into
your existing control panel these custom engraved
plastic labels are the answer you’re looking for!
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QUICK INSTALLATION
The Trident is housed in a shallow-depth case that
is designed for easy installation and servicing. The
extra large front bezel is rated Type 4X, IP65. The
mounting brackets are locked in place to make it easy to
mount the meter in the panel. Removable screw terminal
connectors make for easy and convenient wiring.
Mounting
Dimensions
Notes:
- Panel cutout required: 1.772 x 3.622 (45 x
92)
- Panel thickness: 0.040 – 0.250 (1.0 – 6.4)
- Mounting brackets lock in place for easy
mounting
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SPECIFICATIONS
Except where noted all
specifications apply to operation at +25°C.
General
Display: 0.56" (14.2 mm) red LED, 4 digits
(-1999 to 9999)
Display Intensity: Eight user selectable
intensity levels
Front Panel: NEMA 4X, IP65; panel gasket
provided
Programming Methods: Four front panel buttons,
cloning with Copy feature, PC with MeterView or LabVIEW
software, and Modbus registers. Certified LabVIEW driver
available.
Noise Filter: Programmable 2 to 199 (0 will
disable filter)
Display Update Rate: Process/RTD: 3.7-5/sec;
TC: 1.8-2.5/sec
Overrange: Display flashes 9999
Underrange: Display flashes -1999
Recalibration: All inputs are calibrated at the
factory; recalibration is recommended at least every 12
months.
Max/Min Display: Stored until reset by user or
meter is turned off.
Password: Restricts modification of programmed
settings.
Non-Volatile Memory: Settings stored for a
minimum of 10 years.
Power Options: 85-265 VAC, 50/60 Hz; 90-265
VDC, 20 W max or 12-36 VDC; 12-24 VAC, 6 W max.
Required Fuse: UL Recognized, 5 A max,
slow-blow; up to 6 meters may share one fuse.
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-24 VDC supplies
Operating Temperature: 0 to 65°C
Storage Temperature: -40 to 85°C
Relative Humidity: 0 to 90% non-condensing
Connections: Power & Signal: removable screw
terminal blocks accept 12 to 22 AWG. Serial: RJ11
header, standard on all meters.
Enclosure: 1/8 DIN, high impact plastic, 94V-0,
color; gray
Weight: 9.5 oz (269 g) (including options)
UL File Number: E160849; 508 Industrial Control
Equipment
Warranty: 3 years parts & labor
Extended Warranty: 1 or 2 years, refer to Price
List for details.
Process Inputs
Inputs: Field selectable: 0-20 mA, 4-20 mA, 1-5
V, ±10 V
Accuracy: ±0.05% FS ±1 count; square root:
±0.1% FS ±2 counts
Function: Linear or square root
Low-Flow Cutoff: 0 to 9999 (0 disables cutoff
function)
Decimal Point: Up to 3 decimals: d.ddd, dd.dd,
ddd.d, or dddd
Calibration: Scale without signal or calibrate
with signal source
Calibration Range: User programmable over
entire range of meter
Input Impedance: Voltage range: greater than 1
M Ω, Current range: 50-100Ω, varies with resettable fuse
impedance
Input Overload: Protected by automatically
resettable fuse
Temperature Drift: ±50 PPM/°C
Transmitter Supply: Isolated, one or two
transmitter supplies
P1: 24 VDC ±10% @ 200 mA max (-1 option)
P1 & P2: 24 VDC ±10% @ 200 mA & 40 mA max (-2
option)
Temperature
Inputs
Inputs: Factory calibrated, field selectable:
type J, K, T, or E thermocouples and 100Ω platinum RTD
(0.00385 or 0.00392 curve)
Resolution: 1°; type T: 1°or 0.1°
Cold Junction Reference: Automatic
Temperature Drift: ±2°C maximum
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 k.
Sensor Break: All relays and alarm status LEDs
go to alarm
| Type |
Range |
Accuracy |
Range |
Accuracy |
| J |
-58° to 1328°F |
±2°F |
-50 to 750°C |
±1°C |
| K |
-58º to 2300ºF |
±2°F |
-50 to 1260°C |
±1°C |
| T |
-292º to 700ºF |
±2°F |
-180 to 371°C |
±1°C |
| E |
-58º to 1700ºF |
±2°F |
-50 to 927°C |
±1°C |
| RTD |
-328º to 1382ºF |
±1°F |
-200 to 750°C |
±1°C |
Relays
Rating: 2 Form C (SPDT); rated 3 A @ 30 VDC or
3 A @ 250 VAC resistive load; 1/14 HP @ 125/250 VAC
inductive loads
Deadband: 0-100% FS, user selectable
High or Low Alarm: User may program any alarm
for high or low
Relay Operation:
1. Automatic (non-latching)
2. Latching
3. Pump alternation control
Relay Reset: User selectable via front panel
buttons or PC
1. Automatic reset only (non-latching)
2. Automatic plus manual reset at any time
(non-latching)
3. Manual reset only, at any time (latching)
4. Manual reset only after alarm condition has
cleared (latching)
Automatic Reset: Relays reset when input passes
the reset point
Manual Reset: Front panel button, MeterView,
Modbus registers
Time Delay: 0 to 199 seconds, on and off
delays; programmable
Fail-Safe Operation: Programmable, independent
for each relay. Relay coils are energized in non-alarm
condition. In case of power failure, relays will go to
alarm state.
Auto Initialization: When power is applied to
the meter, relays will reflect the state of the input to
the meter.
Isolated 4-20
mA Transmitter Output
Scaling Range: 1.00 to 23.00 mA; reverse
scaling allowed.
Calibration: Factory calibrated 4.00 to 20.00
mA
Accuracy: ±0.1% FS ±0.004 mA
Temperature Drift: 50 PPM/ºC
Note: Analog output drift is separate from input drift
Isolation: 500 V input-to-output or
output-to-24 VDC supplies;
4 kV output-to-power line
External Power: 35 VDC maximum
Output Loop Resistance:
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Loop Resistance |
| Power Supply |
Minimum | Maximum |
| 24 VDC |
10 Ω |
700 Ω |
| 35 VDC (external) |
100 Ω |
1200 Ω |
Serial
Communications
Compatibility: EIA-232, EIA-422, and EIA-485
with PDA7232 and PDA7422 Trident adapters.
Protocol: PDC and Modbus RTU
Meter Address: PDC protocol: 0 to 99, Modbus
protocol: 1 to 247
Baud Rate: 300 to 19,200 bps
Transmit Time Delay: Programmable 0 to 199 msor
transmitter always on for RS-422 communications.
Data: 8 bit (1 start bit, 1 stop bit)
Parity: None, even, or odd (Modbus only; PDC
protocol does not use parity)
Byte-to-Byte Timeout: 0.01 to 2.54 seconds (Modbus
only)
Turn Around Delay: Less than 2 ms (fixed)
Refer to PDC and Modbus Serial Communications Protocol
manuals for details.
MeterView
Specifications
Precision Digital’s MeterView® software enables
programming the PD765 Trident meter from a PC,
displaying the readings of up to 100 Precision Digital
meters, and data logging of all meters to a file.
MeterView® may be used for monitoring and data logging
applications.
System Requirements: Windows®
95/98/ME/NT4/2000/XP
Communications: RS-232 adapter or RS-422/485
adapters with an RS-232 to RS-485 or USB to RS-485
converter may be used for communicating with the meters.
Number of Meters: Up to 100 meters simultaneously with
addressing capability; minimum scan time for 100 meters:
60 sec
Meter Address: 00 to 99
Baud Rate: 300 bps to 19,200 bps; selection
must match the baud rate selected in the meters.
Screen Update Rate: Dependent on system and
meter settings. Rates of up to 10 meters/second are
attainable at 19,200 bps.
Configuration: Configure meter settings one
meter at a time.
Configuration Report: Save configuration to PDC
file format or export to HTML for printing, cloning, or
restoring meter.
Logging Interval: 2 seconds to 60 hours or
manual
Manual Logging: Data saved to file when Log
button is pressed.
Data Logging Report: Log data to HTML file
format. All enabled meters are logged to a single file.
Alarm Notification: Pop-up message indicates
new alarm condition. Alarm alert notification may be
disabled.
Event Log: Important events are logged with
date and time stamp.
Relay/Alarm Status: Indicate relay/alarm status
with customized color and message label. Relay status
indication may be disabled.
Units & Tag Number: Show engineering units and
tag number information; these settings are not saved to
the meter.
Relay Acknowledge: Relays may be acknowledged
by clicking on corresponding Relay Status button. Meters
must be set up for manual reset and Relay Mode must be
enabled in MeterView.
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