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.
•Read complete instructions prior to installation
and operation of the meter.
•Risk of electric shock or personal injury.
•This product is not recommended for life support
applications or applications where malfunctioning
could result in personal injury or property loss.
Anyone using this product for such applications
does so at his/her own risk. Precision Digital
Corporation shall not be held liable for damages
resulting from such improper use.
WARNING
Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Limited Warranty
Precision Digital Corporation warrants this
product against defects in material or
workmanship for the specified period under
“Specifications” from the date of shipment from
the factory. Precision Digital’s liability under this
limited warranty shall not exceed the purchase
value, repair, or replacement of the defective unit.
FREE MeterView Pro
Programming Software
The meter can be powered from the Micro USB connection.
When using the Micro USB connection, DO NOT apply AC or DC
power to the meter.
The easiest and quickest way to program your PROVU
meter is to use the FREE MeterView Pro
programming software. This software is loaded into
the meter and connects and installs directly to your
PC with a USB cable. We recommend that the first
thing you do after taking the meter out of the box is
connect the PROVU to your PC with the provided USB
cable – do not use a different cable. DO NOT apply
AC or DC power to the meter while your PC is
connected to the meter as it will disrupt the USB
connection. You don’t even have to apply an input
signal.
MeterView Pro programming software is intuitive, and
most customers can get their meter programmed as
they like without even looking in the manual.
Registered Trademarks
All trademarks mentioned in this document are
the property of their respective owners.
In addition to programming, the software may be used
for:
•Monitoring
•Datalogging using your PC
•Generating and saving programming files for
later use
Once your meter is programmed the way you want it,
you can wire it up for your application per the
instructions in this manual and install it. If you find that
you need to make adjustments to the programming
after the meter is installed, you can use the front
panel buttons and the instructions in this manual to do
so.
The PROVU PD6060 is a multipurpose, easy to use
digital dual-input process meter ideal for level, flow
rate, temperature transmitter, or pressure transmitter
applications. Its superluminous LED digits make it
easily readable in smoke, dust, fog, and, with the
optional SunBright display, even direct sunlight. It
accepts current and voltage signals (e.g. 4-20 mA,
0-10 V). Various math functions may be applied to the
inputs including addition, difference, absolute
difference, average, weighted average, multiplication,
division, minimum, maximum, draw, ratio, and
concentration. This is in addition to the input signal
conditioning functions (linear, square root,
programmable exponent, or round horizontal tank
calculations).
The displays, relays, and the analog output may be
assigned to input channels A or B, or math result
channel C.
Three of the front panel buttons can be customprogrammed for a specific operation.
The basic model includes an isolated 24 VDC
transmitter power supply that can be used to power
the input transmitters or other devices. An additional
isolated 24 VDC power supply is included with the
4-20 mA output option. A digital input is standard.
A fully loaded PD6060 meter has the following: four
SPDT relays, 4-20 mA output, and two 24 VDC power
supplies. The PD6060 capabilities may be enhanced
by adding the following external expansion modules:
four SPST relays –creating an eight-relay dual-input
process meter, two digital I/O modules with four inputs
and four outputs each, serial communication adapters
for use with MeterView Pro or Modbus RTU, and a dual
4-20 mA output expansion module.
Line 1: 0.60" (15 mm) high, red LEDs
Line 2: 0.46" (12 mm) high, red LEDs
6 digits each (-99999 to 999999), with lead
zero blanking
Display
Intensity
Eight user selectable intensity levels.
Default value is six.
Display
Update Rate
5/second (200 ms)
Overrange
Display flashes 999999
Underrange
Display flashes -99999
Display
Assignment
Display lines 1 & 2 may be assigned to
process values for Channels A (Ch-A),
B (Ch-B), or C (Ch-C), toggle between
(Ch-A & Ch-B, Ch-A & Ch-C, Ch-B & Ch-C,
and Ch-A, Ch-B, & Ch-C), toggle between
Channel & units, show channel gross value
(no tare) or toggle net (tared) and gross
values, show relay set points, max & min
values, or Modbus input. Line 2 may also
be set to show engineering units or be off,
with no display.
Programming
Methods
Four front panel buttons, digital inputs, PC
and MeterView Pro software, or Modbus
registers.
Noise Filter
Programmable from 2 to 199
(0 will disable filter)
Filter Bypass
Programmable from 0.1 to 99.9% of
calibrated span
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 cycled.
Rounding
Select 1, 2, 5, 10, 20, 50, or 100
(e.g. rounding = 10, value = 123.45,
display = 123.50).
Tare
Tare function zeros out the meter to
accommodate for weight of a container.
Tare function can be assigned to a
function key, F4 terminal, or a digital input.
There are two tare functions: Capture Tare
for channel A and B, and Reset Tare. See
Tare (tare A, tare B) on page 41 for
details.
Reset Tare
Clears the tare function and returns the
display to the value without tare (gross).
Accessed via the Reset menu, function
key, or digital input.
Password
Three programmable passwords restrict
modification of programmed settings.
Pass 1: Allows use of function keys and
digital inputs
Pass 2: Allows use of function keys, digital
inputs and editing set/reset points
Pass 3: Restricts all programming, function
keys, and digital inputs.
Non-Volatile
Memory
All programmed settings are stored in nonvolatile 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;
12-24 VDC, 12-24 VAC, 15 W max.
Powered over USB for configuration only.
Fuse
Required external fuse: UL Recognized,
5 A max, slow blow; up to 6 meters may
share one 5 A fuse
Normal Mode
Rejection
Greater than 60 dB at 50/60 Hz
Isolation
4 kV input/output-to-power line
500 V input-to-output or output-to-P+ supply
Overvoltage
Category
Installation Overvoltage Category II:
Local level with smaller transient
overvoltages than Installation Overvoltage
Category III.
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, RJ45 for external
relays, digital I/O, and serial communication
adapters.
Enclosure
1/8 DIN, high impact plastic, UL 94V-0,
color: black
Front Panel
NEMA 4X, IP65
Mounting
1/8 DIN panel cutout required:
3.622" x 1.772" (92 mm x 45 mm)
Two panel mounting bracket assemblies
are provided.
Tightening
Torque
Screw terminal connectors: 5 lb-in
(0.56 Nm)
Overall
Dimensions
4.68" x 2.45" x 5.64"
(119 mm x 62 mm x 143 mm)
(W x H x D)
Weight
9.5 oz. (269 g)
Warranty
Except where noted all specifications apply to
operation at +25°C.
Two non-isolated inputs, independent, field
selectable: 0-20 mA, 4-20 mA, 10 V (0-5 V,
1-5 V, 0-10 V), Modbus PV (Slave)
Isolated
Transmitter
Power Supply
Terminals P+ & P-: 24 VDC 10%.
All models selectable for 24, 10, or 5 VDC
supply (internal jumper J4). 85-265 VAC
models rated @ 200 mA max, 12-24 VDC
powered models rated @ 100 mA max.
5 & 10 VDC supply rated @ 50 mA max.
Refer to Transmitter Supply Voltage Selection (P+, P-) on page 14.
When the Light / Horn is powered by the
transmitter power supply, see MOD-LH
Light / Horn's transmitter power supply
specification in MOD-LH manual for
additional details. Light / Horn power not
available for 5 or 10 VDC supplies.
Channels
Channel A, Channel B,
Channel C (Math channel)
Programmable
Constants
Constant P (Adder):
-99.999 to 999.999, default: 0.000
Constant F (Factor):
0.001 to 999.999, default: 1.000
Math
Functions
Name
Function
Setting
Addition
(A+B+P)*F
Sunm
Difference
(A-B+P)*F
diF
Absolute diff.
((Abs(A-B))+P)*F
diFAbS
Average
(((A+B)/2)+P)*F
AvG
Multiplication
((A*B)+P)*F
nmulti
Division
((A/B)+P)*F
diVide
Max of A or B
((AB-Hi)+P)*F
Hi-Ab
Min of A or B
((AB-Lo)+P)*F
Lo-Ab
Draw
((A/B)-1)*F
drAuw
Weighted avg.
((B-A)*F)+A
uw avg
Ratio
(A/B)*F
ratio
Ratio 2
((B-A)/A)+P)*F
ratio2
Concentration
(A/(A+B))*F
Concen
Note: The F constant can be any value from
0.001 to 999.999. If the value is less than 1,
it will have the same effect as a divider (1/F).
For example, the average could also be
derived by using (A+B)*0.5 F = (A+B)/2
Sequence of
Operations
for Input
Programming
1. Select Input for A and B
2. Set up the engineering units for
A, B, and C
3. Set up decimal point for A, B, and C
4. Program A & B
5. Set up the displays for A, B, or C
6. Select the transfer function for A & B
(e.g. Linear)
7. Select Math function for Channel C
8. Program constants for Factor (F) and
Adder (P).
9. Program cutoff values for A and B
Accuracy
±0.03% of calibrated span ±1 count,
square root & programmable exponent
accuracy range: 10-100% of calibrated
span
Temperature
Drift
0.005% of calibrated span/C max from
0 to 65C ambient, 0.01% of calibrated
span/C max from -40 to 0C ambient
Input Signal
Conditioning
Linear, square root, programmable
exponent, or round horizontal tank volume
calculation
Multi-Point
Linearization
2 to 32 points for channel A and B
Programmable
Exponent
User selectable from 1.0001 to 2.9999 for
open channel flow
Low-Flow
Cutoff
0.0 to 999,999.9 (0 disables cutoff
function). Point below at which display
always shows zero.
Decimal Point
Up to five decimal places or none:
d.ddddd, d.dddd, d.ddd, d.dd, d.d, or dddddd
Calibration
Range
Input Range
Minimum Span
Input 1 & 2
4-20 mA
0.15 mA
10 V
0.10 V
An error message will appear if the input 1
and input 2 signals are too close together.
Input
Impedance
Voltage ranges: greater than 500 k
Current ranges: 50 - 100 (depending on
resettable fuse impedance)
Input
Overload
Current input protected by resettable fuse,
30 VDC max.
Fuse resets automatically after fault is
removed.
HART
Incompatible
The meter can support ONLY one HART
loop on either of the inputs. A signal
isolator, such as the PD659 is required if
two HART loops are being connected.
Under the described conditions, the meter
does not interfere with existing HART
communications; it displays the 4-20 mA
primary variable and it allows the HART
communications to pass through without
interruption. The meter is not affected if a
HART communicator is connected to the
loop. The meter does not display
secondary HART variables.
2 or 4 SPDT (Form C) internal and/or
4 SPST (Form A) external; rated 3 A
@ 30 VDC and 125/250 VAC resistive load;
1/14 HP (≈ 50 W) @ 125/250 VAC for
inductive loads
Noise
Suppression
Noise suppression is recommended for
each relay contact switching inductive
loads. See Switching Inductive Loads on
page 15 for details.
Deadband
0-100% of span, user programmable
High or Low
Alarm
User may program any alarm for high or
low trip point. Unused alarm LEDs and
relays may be disabled (turn off).
Relay
Operation
•Automatic (non-latching) and/or
manual reset
•Latching (requires manual
acknowledge) with or without clear
• Pump alternation control (2-8 relays)
• Sampling (based on set point and time)
• Off (disable unused relays and enable
Interlock feature)
•Manual on/off control mode
Relay Reset
User selectable via front panel button, F4
terminal at back of meter, external contact
closure on digital inputs, or through serial
communications
Time Delay
0 to 999.9 seconds, on & off relay time
delays. Programmable and independent for
each relay
Fail-Safe
Operation
Programmable and independent for each
relay.
Note: Relay coil is energized in non-alarm
condition. In case of power failure, relay 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.
Additional
Relays
An external module, model PDA1004, is
available to add 4 SPST 3 A relays to the
meter.
Isolated 4-20 mA Transmitter
Output
Output
Source
Process channel A, B, or C, max or min for
channel A, B, or highest or lowest of A and
B, set points 1-8, Modbus input, or manual
control mode
Scaling
Range
1.000 to 23.000 mA for any display range
Calibration
Factory calibrated:
4.000 to 20.000 = 4-20 mA output
Analog Out
Programming
23.000 mA maximum for all parameters:
Overrange, underrange, max, min, and
break
Accuracy
± 0.1% of span ± 0.004 mA
Temperature
Drift
0.4 µA/C max from 0 to 65C ambient,
0.8 µA/C max from -40 to 0C ambient
Note: Analog output drift is separate from
input drift.
Isolated
Transmitter
Power Supply
Terminals I+ & R: 24 VDC 10%. May be
used to power the 4-20 mA output or other
devices.
All models rated @ 40 mA max.
External Loop
Power Supply
35 VDC maximum
Output Loop
Resistance
Power supply
Minimum
Maximum
24 VDC
10
700
35 VDC
(external)
100
1200
0-10 VDC
Output
The PD659-1MA-1Vcan convert the
optional 4-20 mA output to a 0-10 VDC
output
Additional
4-20 mA
Outputs
An external module, model PDA1011, is
available to add two 4-20 mA outputs to
the meter.
DO NOT apply AC or DC power to the
meter while the USB port is in use.
Function
Remote operation of front-panel buttons,
acknowledge/reset relays, reset max/min
values. See Function Keys & Digital I/O Available Settings on page 40 for a
complete list of capabilities.
Contacts
3.3 VDC on contact. Connect normally
open contacts across F4 to COM
Logic Levels
Logic High: 3 to 5 VDC
Logic Low: 0 to 1.25 VDC
Additional I/O
Up to 2 external modules, model PDA1044
with 4 digital inputs and 4 digital outputs
each can be added.
Slave Id
1 – 247 (Meter address)
Baud Rate
300 – 19,200 bps
Transmit
Time Delay
Programmable between 0 and 199 ms
Data
8 bit (1 start bit, 1 or 2 stop bits)
Parity
Even, Odd, or None with 1 or 2 stop bits
Byte-To-Byte
Timeout
0.01 – 2.54 second
Turn Around
Delay
Less than 2 ms (fixed)
Availability
System
Requirements
Microsoft® Windows® XP/Vista/7/8/10
Communications
USB 2.0 (for programming only)
(Standard USB A to Micro USB B)
RS-232 adapter, RS-485 adapter and
RS-485 to USB converter
(programming, monitoring, and data
logging)
Configuration
Configure meters one at a time
Power
USB port provides power to the meter.
DO NOT apply AC or DC power to the
meter while the USB port is in use.
EN 61010-1:2010
Safety requirements for measurement,
control, and laboratory use
Electromagnetic Compatibility
Emissions
EN 55022:2010
Class A ITE 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)
PowerFrequency
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
Note:
Testing was conducted on 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.
Safety Information
•Read complete instructions prior to installation
and operation of the meter.
• Risk of electric shock or personal injury.
• Hazardous voltages exist within enclosure.
Installation and service should be performed only
by trained service personnel.
Installation
There is no need to remove the meter from its
case to complete the installation, wiring, and
setup of the meter for most applications.
Instructions are provided for changing the
transmitter power supply to output 5 or 10 VDC
instead of 24 VDC. See Figure 5. Transmitter Supply Voltage Selection on page 14.
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.
•Clearance: allow at least 6.0" (152 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.
Mounting Dimensions
Figure 3. Meter Dimensions - Side View
Figure 1. 1/8 DIN Panel Cutout Dimensions
DO NOT apply AC or DC power to the meter when using the
Micro USB connection.
software, once the installation has completed, you
will be asked if you want to update the setup files
located on the meter itself. This way, you will
always have the most current version on the meter
for future installs.
We recommend the following sequence for getting the
meter into service:
1.DO NOT apply AC or DC power to the meter.
2.Connect the meter to the PC with the USB cable
provided. DO NOT use a different USB cable.
3.If MeterView Pro (MVPro) is already installed in
your computer, then the program will launch
automatically in most systems. If the program
does not start automatically, double-click on the
MVPro icon.
4.If MVPro is not installed, follow the instructions
provided below.
5.Use MVPro to configure the meter for your
application.
6.Disconnect the USB cable from the meter.
7.Apply power and signal and check operation of
the meter.
8.Install the meter and put into service.
9.Make any programming adjustments using the
front panel buttons.
MeterView Pro Software
The easiest and quickest way to program your PROVU
meter is to use the FREE MeterView Pro
programming software. This software is loaded into
the meter and connects and installs directly to your
PC with the USB cable provided. DO NOT use a
different USB cable. We recommend that the first
thing you do after taking the meter out of the box is
connect the PROVU to your PC with the provided USB
cable. DO NOT apply AC or DC power to the meter
while your PC is connected to the meter as it will
disrupt the USB connection. It is not necessary to
apply an input signal.
MeterView Pro programming software is intuitive, and
most customers can get their meter programmed as
they like without even looking in the manual.
2.Once the driver is installed, an AutoPlay
dialog should appear for the drive
“MAINSTAL.” Click “Open folder to view
files.”
If the computer does not display an AutoPlay
dialog for the drive “MAINSTAL,” you should
open My Computer and double-click on the
drive labeled “MAINSTAL.”
3.Double-click on the file named “MAStart.”
The program will open a few windows and
install two programs on your computer.
Simply follow the on-screen instructions until
you see one of the dialogs below. If you
receive a “User Account Control” warning,
click “Yes.”
4.If there is an update available, click the
“Update” button to install the new version.
Otherwise, click “Configure” to begin
programming your meter.
MeterView Pro Installation
1.Connect one end of the provided USB cable
to the meter and the other end to the
computer. The computer will automatically
install the driver software it needs to talk to
the meter. Follow the on-screen instructions
and allow sufficient time for the process to
complete. This can take a few minutes. If the
process is interrupted, then it could leave the
system in an unstable condition.
•Only one meter may be connected at a time.
Attaching multiple meters will cause a conflict
with the meter software.
•DO NOT apply AC or DC power to the meter
when using the Micro USB connection.
•DO NOT unplug the meter while the new
installation files are being written to it. The meter
will display uwrite during the process and you
will receive an on-screen notification once the
process is complete.
13
Page 14
PROVU™ PD6060 Dual Analog Input Process Meter
Instruction Manual
14
Transmitter Supply Voltage
Selection (P+, P-)
All meters, including models equipped with the
12-24 VDC power option, are shipped from the
factory configured to provide 24 VDC power for
the transmitter or sensor.
If the transmitter requires 5 or 10 VDC excitation,
the internal jumper J4 must be configured
accordingly.
To access the voltage selection jumper:
1. Remove all the wiring connectors.
2. Unscrew the back cover.
3. Slide out the back cover by about 1
inch.
4. Configure the J4 jumper, located behind
the input signal connector, for the
desired excitation voltage as shown.
Figure 5. Transmitter Supply Voltage Selection
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.
Connectors Labeling
The connectors’ label, affixed to the meter, shows the
location of all connectors available with requested
configuration.
Note: ## on the following figures refers to power and
display options. (Example: PD6060-6H5)
Figure 6. PD6060-##0 Connectors Label
Figure 7. PD6060-##2 Connectors Label
Figure 8. PD6060-##3 Connectors Label
Figure 9. PD6060-##4 Connectors Label
Figure 10. PD6060-##5 Connectors Label
Figure 11. PD6060-##7 Connectors Label
•DO NOT connect any equipment other than
Precision Digital’s expansion modules, cables, or
meters to the RJ45 M LINK connector. Otherwise
damage will occur to the equipment and the
meter.
Power connections are made to a two-terminal
connector labeled POWER. The meter will operate
regardless of DC polarity connection. The + and symbols are only a suggested wiring convention.
Figure 12. Power Connections
Signal Connections
Signal connections are made to a nine-terminal
connector labeled SIGNAL. The COM (common)
terminals are the return for the 4-20 mA and the
10 V input signals. The two COM terminals connect
to the same common return, and are not isolated.
Current and Voltage Connections
The following figures show examples of 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 13. Transmitters Powered by Internal
Supply
Figure 14. Transmitter Powered by Ext. Supply or
Self-Powered
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 15. Voltage Input Connections
The meter is capable of accepting any voltage from
-10 VDC to +10 VDC.
Modbus RTU Serial
Communications
Serial communications connection is made to an
RJ45 connector labeled M-LINK. For interfacing to the
PROVU, use the PDA1232 for RS-232 or the PDA1485
for RS-485. The same port is used for interfacing with
all expansion modules (e.g. external relays, digital
I/O).
Relay Connections
Relay connections are made to two six-terminal
connectors labeled RELAY1 – RELAY4. Each relay’s
C terminal is common only to the normally open (NO)
and normally closed (NC) contacts of the
corresponding relay. The relays’ C terminals should
not be confused with the COM (common) terminal of
the INPUT SIGNAL connector.
The use of snubbers to suppress electrical noise is
strongly recommended when switching inductive
loads to prevent disrupting the microprocessor’s
operation. The snubbers 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 17. AC and DC Loads Protection
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. Use capacitors rated for 250 VAC.
2. RC networks may affect load release time of
solenoid loads. Check to confirm proper
operation.
3. 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.
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.
Figure 18. Low Voltage DC Loads Protection
RC Networks (Snubbers) 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.
F4 Digital Input Connections
A digital input, F4, is standard on the meter. This
digital input should be connected with a normally
open contact across F4 and COM, or with an active
low signal applied to F4. It can be used for remote
operation of front-panel buttons, to acknowledge/reset
relays, or to reset max/min values. See Function Keys & Digital I/O Available Settings on page 40 for a
complete list of capabilities.
Figure 19. F4 Digital Input Connections
4-20 mA Output Connections
Connections for the 4-20 mA transmitter output are
made to the connector terminals labeled mA OUT.
The 4-20 mA output may be powered internally or
from an external power supply.
Figure 20. 4-20 mA Output Connections
Analog Output Power Supply
The internal 24 VDC power supply powering the
analog output may be used to power other devices, if
the analog output is not used. The I+ terminal is the
+24 V and the R terminal is the return.
External Relay, Analog Output, &
Digital I/O Connections
The relay, dual analog output, and digital I/O
expansion modules PDA1004, PDA1011, and
PDA1044 are connected to the meter using a CAT5
cable provided with each module. The two RJ45
connectors on the expansion modules are identical
and interchangeable; they are used to connect
additional modules to the system.
Note: The jumper located between the RJ45
connectors of the PDA1044 must be removed
on the second digital I/O module in order for the
system to recognize it as module #2.
•DO NOT connect or disconnect the expansion
modules with the power on! More detailed
instructions are provided with each optional
expansion module.
Figure 22. Expansion Module & DIN Rail Mounting
Kit
Figure 23. External Relays Module Connections
Figure 24. Digital I/O Module Connections
Figure 25. Dual 4-20 mA Output Module
Connections
Interlock Relay Feature
As the name implies, the interlock relay feature
reassigns one, or more, alarm/control relays for use
as interlock relay(s). Interlock contact(s) are wired to
digital input(s) and activate the interlock relay. This
feature is enabled by configuring the relay, and the
corresponding digital input(s), see Setting Up the Interlock Relay (Force On) Feature on page 32.
In the example below, an Interlock Contact switch is
connected to a digital input, which will be used to
force on (energize) the Interlock Relay. The Interlock
Relay and the Control Relay are connected in series
with the load.
•When the Interlock Contact is closed (safe), the
Interlock Relay energizes, allowing power to flow
to the Control Relay; the corresponding front
panel LED is on.
•When the Interlock Contact is open, the
corresponding front panel LED flashes (locked
out), the Interlock Relay is de-energized,
preventing power from flowing to the Control
Relay and the load.
The main menu consists of the most commonly used
functions: Reset, Control, Setup, and Password.
•Press Menu button to enter Programming Mode
then press the Up arrow 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 are not saved.
•Changes to the settings are saved to memory
only after pressing Enter.
•The display moves to the next menu every time a
setting is accepted by pressing Enter.
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 and
hold Up to auto-increment the display value. If
negative numbers are allowed, the first digit position
will include a negative symbol (-) after the 9.
Press the Enter button, at any time, to accept a
setting or Menu button to exit without saving changes.
Setting Up the Meter (setup)
The Setup menu is used to select:
1. Input signal the meter will accept for channel A
and channel B
2. Units for A, B, and C
3. Decimal point position for A, B, and C
4. Program the meter using the Scale or Calibrate
functions
Enter the Input menu to set up the meter to display
current (nmA) or voltage (Volt) inputs for channel A
and channel B.
The current input is capable of accepting any signal
from 0 to 20 mA. Select current input to accept
0-20 mA or 4-20 mA signals.
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.
Channel C is the Math Function calculation, which is
set up in the Advanced Features menu.
Setting the Display Units or
Custom Tags (units)
Enter the display unit or custom tag that will be
displayed if alternating process input and units is
selected in the units menu, or d unit is selected as
the lower display parameter. See the Setting the Display Parameter & Intensity (dsplay) flow chart on
page 25 to access the display menu to show the unit or
tag on display line 2. The engineering units or custom
legends can be set using the following 7-segment
character set:
Display
Character
Display
Character
0
0
k
K
1
1
l
L
2
2
n m
m
3
3
n
n
4
4
O
O
5
5
o
o
6
6
p
P
7
7
q
q
8
8
r
r
9
9
s S A
A
t
t
b
b
u
u
C
C
v
V
c
c
uw
w
d
d
x X e
E
y
Y
f
F
z
Z
g
G
-
-
9
g
/
/
H
H
[
]
h
h
]
[
I
I
=
=
I
i
!
Degree(<)
j
J
Space
Notes:
Degree symbol represented by (<) if programming with
MeterViewPro.
The letters “m” and “w” use two 7-segment LEDs each;
when selected the characters to the right are shifted one
position.
Press and hold up arrow to auto-scroll the characters in
the display.
The decimal point may be set with up to five decimal
places or with no decimal point at all.
Pressing the Right arrow moves the decimal point one
place to the right until no decimal point is displayed,
and then it moves to the leftmost position.
There are three decimal points to set up for three
channels: Ch-A, Ch-B, and Ch-C.
After the decimal points are set up, the meter moves
to the Program menu.
Programming the Meter (prog)
The meter may either be scaled (SCALE) without
applying an input or calibrated (Cal) by applying an
input. The meter comes factory calibrated to NIST
standards, so for initial setup, it is recommended to
use the (SCALE) function.
The Program menu contains the Scale (SCALE) and
the Calibrate (Cal) menus.
Process inputs may be scaled or calibrated to any
display within the range of the meter.
Note: The Scale and Calibrate functions are
exclusive of each other. The meter uses the last
function programmed. Only one of these methods can
be employed at a time. The Scale and Calibrate
functions can use up to 32 points (default is 2). The
number of points should be set in the Advanced Menu
prior to scaling and calibration of the meter. See
Multi-Point Linearization (Linear) on page 38 for
details.
Multi-Point Linearization (Linear)
The process inputs may be calibrated or scaled to any
display value within the range of the meter. The meter
is set up at the factory for 2-point linear calibration.
Up to 32 linearization points may be selected. See
Multi-Point Linearization (Linear) on page 38 for
details.
Scaling the Meter (SCalE)
The process inputs (4-20 mA, 10 VDC) can be
scaled to display the process variables in engineering
units.
A signal source is not needed to scale the meter;
simply program the inputs and corresponding display
values.
Scaling the Meter for Channel A
(SCal-A)
Scaling the Meter for Channel B
(SCal-B)
For instructions on how to program numeric values
see Setting Numeric Values, page 21.
Error Message (Error)
An error message indicates that the calibration or
scaling process was not successful.
After the error message is displayed, the meter
reverts to input 2 during calibration or scaling and to
input 1 during internal calibration, allowing the
appropriate input signal to be applied or programmed.
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.
Note: To scale the meter without a signal source,
refer to Scaling the Meter (SCalE) on page 23.
The meter can be calibrated to display the process
variable 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.
Setting the Display Parameter &
Intensity (dsplay)
Display line 1 can be programmed to display:
1. Process value Ch-A
2. Process value Ch-B
3. Process value Ch-C
4. Toggle between Ch-A & Ch-B, Ch-A & Ch-C,
Ch-B & Ch-C, and Ch-A, Ch-B, & Ch-C
5. Relay set points
6. Max & min values for each channel
7. Toggle between Channel & units
8. Channel gross value (no tare) or toggle net
(tare) and gross values
9. Modbus input
Display line 2 can be programmed to display:
1. Process value Ch-A
2. Process value Ch-B
3. Process value Ch-C
4. Toggle between Ch-A & Ch-B, Ch-A & Ch-C,
Ch-B & Ch-C, and Ch-A, Ch-B, & Ch-C
5. Relay set points
6. Max & min values for each channel
7. Toggle between Channel & units
8. Channel gross value (no tare) or toggle net
(tare) and gross values
9. Modbus input
10. Off (no display)
11. Engineering units or custom legends
After setting up the input and display, press the Menu
button to exit programming and skip the rest of the
setup menu.
The displays can be set up to read channels A, B, or
C, toggle between A & B, B & C, A & C, A & B & C,
toggle between channels A, B, or C & units, the
max/min of any of the channels, including the math
channel (C), set points, gross (without tare) or net
(with tare) & gross values of channel A or B, or the
Modbus input. In addition to the parameters available
on the Upper display, the Lower display can display
Engineering units or it could be turned off.
Display Intensity (d-Inty)
The meter has eight display intensity levels to give the
best performance under various lighting conditions.
Select intensity 8 for outdoor applications. The default
intensity is 6.
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 the set and reset points are
programmed with the same value, the relay will reset
one count below the set point.
Note: Changes are not saved until the reset point has
been accepted.
Setting Fail-Safe Operation
In fail-safe mode of operation, the relay coil is
energized when the process variable is within safe
limits and the relay coil is de-energized when the
alarm condition exists. 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 999.9 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.
Relay Action for Loss of 4-20 mA
Input (Loop Break)
The loop break feature is associated with the 4-20 mA
input. Each relay may be programmed to go to one of
the following conditions when the meter detects the
loss of the input signal (i.e. < 0.005 mA):
1. Turn On (Go to alarm condition)
2. Turn Off (Go to non-alarm condition)
3. Ignore (Processed as a low signal condition)
Note: This is not a true loop break condition; if the
signal drops below 0.005 mA, it is interpreted as a
“loop break” condition.
The following graph shows the loop break relay
operation for a high alarm relay.
Relay and Alarm Operation
Diagrams
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. To
detect a new alarm condition, the signal must go below the set point, and then go
above it.
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.
High Alarm with Fail-Safe
Operation (Set > Reset)
Note: Relay coil is energized in non-alarm condition. In case of power failure,
relay will go to alarm state.
Low Alarm with Fail-Safe
Operation (Set < Reset)
Note: Relay coil is energized in non-alarm condition. In case of power failure,
relay will go to alarm state.
Time Delay Operation
The following graphs show the operation of the time
delay function.
When 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: If “Automatic or Manual (A-nmAn)” reset mode is
selected, the LED follows the reset point and not the
relay state when the relay is acknowledged.
When the signal crosses the set point, the relay trips and the sample time starts. After the sample time has elapsed,
the relay resets. The cycle repeats every time the set point is crossed, going up for high alarms and going down for
low alarms.
The sample time can be programmed between 0.1 and 5999.9 seconds.
The relay capabilities of the meter expand its
usefulness beyond simple indication to provide users
with alarm and control functions. These capabilities
include front panel alarm status LEDs as well as
either 2 or 4 optional internal relays and/or 4 external
relays expansion module. Typical applications include
high or low temperature, level, pressure or flow
alarms, control applications such as simple on/off
pump control, and pump alternation control for up to 8
pumps. There are four basic ways the relays can be
used:
1. High or Low Alarms with Latching or NonLatching Relays
2. Simple On/Off Control with 100% Adjustable
Deadband
3. Sampling (Based on Time)
4. Pump Alternation Control for up to 8 Pumps
Relays Auto Initialization
When power is applied to the meter, the front panel
LEDs and alarm relays will reflect the state of the
input to the meter. The following table indicates how
the alarm LEDs and relays will react on power-up
based on the set and reset points:
Fail-Safe Operation
The following table indicates how the relays behave
based on the fail-safe selection for each relay:
Fail-Safe
Selection
Non-Alarm State
Alarm State
Power
Failure
NO
NC
NO
NC
Off
Open
Closed
Closed
Open
Relays
go to
nonalarm
state
On
Closed
Open
Open
Closed
Relays
go to
alarm
state
Note: NO = Normally Open, NC = Normally Closed.
This refers to the condition of the relay contacts
when the power to the meter is off.
Front Panel LEDs
The LEDs on the front panel provide status indication
for the following:
LED
Status
LED
Status
1
Alarm 1
5 Alarm 5
2
Alarm 2
6 Alarm 6
3
Alarm 3
7 Alarm 7
4
Alarm 4
8 Alarm 8
The meter is supplied with four alarm points that
include front panel LEDs to indicate alarm conditions.
This standard feature is particularly useful for alarm
applications that require visual-only indication. The
LEDs are controlled by the set and reset points
programmed by the user. When the display reaches a
set point for a high or low alarm, the corresponding
alarm LED will turn on. When the display returns to
the reset point the LED will go off. The front panel
LEDs responds differently for latching and nonlatching relays.
For non-latching relays, the LED is always off during
normal condition and always on during alarm
condition, regardless of the state of the relay (e.g.
Relay acknowledged after alarm condition).
For latching relays, the alarm LEDs reflects the status
of the relays, regardless of the alarm condition. The
following tables illustrate how the alarm LEDs function
in relation to the relays and the acknowledge button
(Default: F3 key assigned to ACK).
Latching and Non-Latching Relay
Operation
The relays can be set up for latching (manual reset)
or non-latching (automatic reset) operation.
Relay terminology for following tables
Terminology
Relay Condition
On
Alarm (Tripped)
Off
Normal (Reset)
Ack
Acknowledged
The On and Off terminology does not refer to the
status of the relay’s coil, which depends on the failsafe mode selected.
•In latching relay mode, if Fail-Safe is off, latched
relays will reset (unlatch) when power is cycled.
In this application, the meter is set up for automatic
reset (non-latching relay). Acknowledging the alarm
while it is still present has no effect on either the LED
or the relay. When the alarm finally goes away, the
relay automatically resets and the LED also goes off.
Non-Latching Relay with Manual
Reset (A-nman)
In this application, the meter is set up for automatic
and manual reset at any time (non-latching relay).
The LED and the relay automatically reset when the
meter returns to the normal condition.
In addition, the relay can be manually reset while the
alarm condition still exists, but the LED will stay on
until the meter returns to the normal condition.
Automatic + manual reset at any time
Condition
LED
Relay
Normal
Off
Off
Alarm
On
On
Normal
Off
Off
Next Alarm
On
On
Ack
On
Off
Normal
Off
Off
Latching Relay (LatcH)
In this application, the meter is set up for manual
reset at any time. Acknowledging the alarm even
if the alarm condition is still present resets the
relay and turns off the LED.
Manual reset any time
Condition
LED
Relay
Normal
Off
Off
Alarm
On
On
Ack
Off
Off
Latching Relay with Clear (Lt-Clr)
In this application, the meter is set up for manual
reset only after the signal passes the reset point
(alarm condition has cleared). Acknowledging the
alarm while it is still present has no effect on either
the LED or the relay. When the alarm is
acknowledged after it returns to the normal state, the
LED and the relay go off. Notice that the LED remains
on, even after the meter returns to the normal
condition. This is because, for latching relays, the
alarm LED reflects the status of the relay, regardless
of the alarm condition.
Manual reset only after
alarm condition has cleared
Condition
LED
Relay
Normal
Off
Off
Alarm
On
On
Ack (No effect)
On
On
Normal
On
On
Ack
Off
Off
Acknowledging Relays
There are three ways to acknowledge relays
programmed for manual reset:
1. Via the programmable front panel function keys
F1-F3 (Example: F3 assigned to ACK).
2. Remotely via a normally open pushbutton wired
to the F4 terminal at the rear of the instrument.
3. One of the digital inputs and the +5 V terminals
on the digital I/O expansion module.
When the ACK button or the assigned digital input is
closed, all relays programmed for manual reset are
acknowledged.
For pump control applications where two or more
similar pumps are used to control the level of a tank
or a well, it is desirable to have all the pumps operate
alternately. This prevents excessive wear and
overheating of one pump over the lack of use of the
other pumps.
Up to 8 relays can be set up to alternate every time
an on/off pump cycle is completed. The set points and
reset points can be programmed, so that the first
pump on is the first pump off.
Application #1: Pump Alternation
Using Relays 1 & 2
1. Relays 1 and 2 are set up for pump alternation.
2. Relays 3 and 4 are set up for low and high alarm
indication.
Set and Reset Point Programming
Relay
Set Point
Reset Point
Function
1
30.000
10.000
Controls
pump #1
2
35.000
5.000
Controls
pump #2
3
4.000
9.000
Controls
low alarm
4
40.000
29.000
Controls
high alarm
Pump Alternation Operation
1. Pump #1 turns on when level reaches 30.000,
when level drops below 10.000 pump #1 turns
off.
2. The next time level reaches 30.000, pump #2
turns on, when level drops below 10.000, pump
#2 turns off.
3. If the level doesn’t reach 35.000 pump #1 and
pump #2 will be operating alternately.
4. If pump #1 cannot keep the level below 35.000
pump #2 will turn on at 35.000, then as the level
drops to 10.000 pump #1 turns off, pump #2 is
still running and shuts off below 5.000.
5. Notice that with the set and reset points of pump
#2 outside the range of pump #1, the first pump
on is the first pump to go off. This is true for up to
8 alternating pumps, if setup accordingly.
6. Relay #3 will go into alarm if the level drops
below 4.000 and relay #4 will go into alarm if the
level exceeds 40.000.
7. Adding the 4 external relays expansion module
allows using the 4 SPDT internal relays for pump
alternation and the 4 SPST external relays for
high, high-high, low, and low-low alarm
indication.
Setting Up the Interlock Relay
(Force On) Feature
Relays 1-4 can be set up as interlock relays. To set
up the relays for the interlock feature:
1. Access the Setup – Relay – Action menu and set
the action to off.
2. In the Advanced features – User menu program
any of the digital inputs to Force On any of the
internal relays (1-4).
3. Connect a switch or dry contact between the +5V
terminal and the corresponding digital input
(dI-1 to dI-4) terminal.
Interlock Relay Operation Example
Relays 1 & 2 are configured to energize (their front
panel LEDs are steady on) when SW1 & SW2
switches (above) are closed. If the contacts to these
digital inputs are opened, the corresponding front
panel LEDs flash, indicating this condition. The
processes being controlled by the interlock relay will
stop, and will re-start only after the interlock relay is
re-activated by the digital inputs (switches).
Note: If multiple digital inputs are assigned to the
same relay, then the corresponding logic is (AND) –
i.e. both switches must be closed to trip the relay.
The 4-20 mA analog outputs can be scaled to provide
a 4-20 mA signal for any display range selected. To
select the channel and source assignments the
analog outputs are assigned to, see Analog Output Source on page 39.
No equipment is needed to scale the analog outputs;
simply program the display values to the
corresponding mA output signal.
The Analog Output menu is used to program the
4-20 mA outputs based on display values.
For further details , see Setting Numeric Values,
page 21, Relay Action for Loss of 4-20 mA Input (Loop Break), page 27.
Reset Menu (reset)
The Reset menu is used to reset the maximum or
minimum reading (peak or valley) reached by the
process; both may be reset at the same time by
selecting “reset high & low” (rst HL). The tare value
used to zero the display may be reset by selecting
“reset tare” (rst tr).
Manual Control Menu (Contrl)
The Manual Control menu is used to control the
4-20 mA analog output and the relays manually,
ignoring the input. Each relay and analog output can
be programmed independently for manual control.
Selecting automatic control sets all relays and analog
output for automatic operation.
The Password menu is used for programming three
levels of security to prevent unauthorized changes to
the programmed parameter settings.
Pass 1: Allows use of function keys and digital
inputs
Pass 2: Allows use of function keys, digital inputs
and editing set/reset points
Pass 3: Restricts all programming, function keys,
and digital inputs.
Protecting or Locking the Meter
Enter the Password menu and program a six-digit
password.
For instructions on how to program numeric values
see Setting Numeric Values, page 21.
Making Changes to a Password
Protected Meter
If the meter is password protected, the meter will
display the message Locd (Locked) when the Menu
button is pressed. Press the Enter button while the
message is being displayed and enter the correct
password to gain access to the menu. After exiting
the programming mode, the meter returns to its
password protected condition.
Disabling Password Protection
To disable the password protection, access the
Password menu and enter the correct password
twice, as shown below. The meter is now unprotected
until a new password is entered.
If the correct six-digit password is entered, the meter
displays the message unLoc (Unlocked) and the
protection is disabled until a new password is
programmed.
If the password entered is incorrect, the meter
displays the message Locd (Locked) for about two
seconds, and then it returns to Run Mode. To try
again, press Enter while the Locked message is
displayed.
Did you forget the password?
The password may be disabled by entering a
master password once. If you are authorized to
make changes, enter the master password 508655
to unlock the meter.
Calibrate 4-20 mA output
(internal reference source
used for scaling the output)
4 nmA
4 mA output
Enter mA output value read
by milliamp meter with at
least 0.001 mA resolution
20 nmA
20 mA output
Enter mA output value read
by milliamp meter with at
least 0.001 mA resolution
User
User I/O
Assign function keys and
digital I/O
F1*
F1* function key
Assign F1 function key
(*F1/F2/F3)
F4
F4 function
Assign F4 function
(digital input)
dI I
Digital input 1
Assign digital input 1 – 8, if
expansion modules are
connected
dO 1
Digital output 1
Assign digital output 1 – 8,
if expansion modules are
connected
ICal
Internal
calibration
Enter internal calibration
(used for recalibrating the
meter with a calibrated
signal source)
Ch-A
Channel A
Perform calibration on
channel A
Ch-b
Channel B
Perform calibration on
channel B
C CAL
Current
calibration
Calibrate 4-20 mA current
input (internal reference
source used for scaling the
input)
C lo
Current low
Calibrate low current input
(e.g. 4 mA)
C Hi
Current high
Calibrate high current input
(e.g. 20 mA)
V CAL
Voltage
calibration
Calibrate voltage input
Advanced Features Menu & Display Messages
Display
Parameter
Action/Setting
V Lo
Voltage low
Calibrate low voltage input
(e.g. 0 V)
V Hi
Voltage high
Calibrate high voltage input
(e.g. 10 V)
Diag
Diagnostics
Display parameter settings
LED t
LED test
Test all LEDs
Info
Information
Display software and S/N
information
Noise Filter (filter)
The noise filter is available for unusually noisy signals
that cause an unstable process variable display. The
noise filter averages the input signal over a certain
period. The filter level determines the length of time
over which the signal is averaged. The filter level can
be set between 2 and 199. The higher the filter level,
the longer the averaging time and so the longer it
takes the display to settle to its final value. Setting the
filter level to zero disables the filter function.
Noise Filter Bypass (bypass)
The noise filter bypass changes the behavior of the
meter so that small variations in the signal are filtered
out but large abrupt changes in the input signal are
displayed immediately. The bypass value determines
the minimum amount of signal change to be displayed
immediately. All signal changes smaller than the
bypass value are filtered or averaged by the meter.
The noise filter bypass may be set between 0.1 and
The rounding feature is used to give the user a
steadier display with fluctuating signals. Rounding is
used in addition to the filter function.
Rounding causes the display to round to the nearest
value according to the rounding selected. See
examples below:
Modbus RTU Serial
Communications (serial)
The meter is equipped with serial communications
capability as a standard feature using Modbus RTU
Serial Communication Protocol.
The meter may be connected to a PC for initial
configuration via the onboard micro USB connection.
For ongoing digital communications with a computer
or other data terminal equipment, an RS-232, or
RS-485 option is required; see Ordering Information
on page 6 for details.
Select Menu (SElect)
The Select menu is used to select the input signal
conditioning function applied to the inputs (linear,
square root, programmable exponent, or round
horizontal tank), math function for A & B, constants,
low-flow cutoff, and analog output programming.
Multi-point linearization is part of the linear function
selection.
•DO NOT connect any equipment other than
Precision Digital’s expansion modules, cables, or
meters to the RJ45 M LINK connector. Otherwise
damage will occur to the equipment and the
meter.
Note: More detailed instructions are provided with
each optional serial communications adapter.
When using more than one meter in a multi-drop
mode, each meter must be provided with its own
unique address. The meter address (Slave ID) may
be programmed between 1 and 247. The transmit
delay may be set between 0 and 199 ms. The parity
can be set to even, odd, or none with 1 or 2 stop bits.
Changes made to the Serial menu are initialized after
the MENU key is pressed or after navigating through
the t-byte parameter.
Input Signal Conditioning (Functn)
The Function menu is used to select the input-tooutput transfer function applied to the input signal:
linear, square root, programmable exponent, or round
horizontal tank volume calculation. Multi-point
linearization is part of the linear function selection.
Meters are set up at the factory for linear function with
2-point linearization. The linear function provides a
display that is linear with respect to the input signal.
The square root function is used to calculate flow
measured with a differential pressure transmitter. The
flow rate is proportional to the square root of the
differential pressure. Scale the meter so that the low
input signal (e.g. 4 mA) is equal to zero flow and the
high input signal (e.g. 20 mA) is equal to the
maximum flow.
Programmable Exponent
Linearization (Prog E)
The programmable exponent function is used to
calculate open-channel flow measured with a level
transmitter in weirs and flumes. The flow rate is
proportional to the head height. Scale the meter so
that the low input signal (e.g. 4 mA) is equal to zero
flow and the high input signal (e.g. 20 mA) is equal to
the maximum flow. This method works well for all
weirs and flumes that have a simple exponent in the
flow calculation formula. For weirs and flumes with
complex exponents it is necessary to use a strapping
table and the 32-point linearization of the meter.
Multi-Point Linearization (Linear)
Meters are set up at the factory for linear function with
2-point linearization. Up to 32 linearization points can
be selected for each channel under the linear
function. The multi-point linearization can be used to
linearize the display for non-linear signals such as
those from level transmitters used to measure volume
in odd-shaped tanks or to convert level to flow using
weirs and flumes with complex exponent.
Round Horizontal Tank
Linearization (rHt)
This function is used to calculate volume in a round
horizontal tank with flat ends. The volume is
calculated based on the diameter and length of the
tank. The tank’s dimensions can be entered in inches
or centimeters; the meter automatically calculates the
volume in gallons or liters. After entering the
dimensions, complete the scaling process with the
display values calculated by the meter. The meter can
be re-scaled to display the volume in any engineering
unit without the need to re-enter the dimensions
again.
Note: After Scale is displayed continue pressing the
Enter button until the meter completes the
scaling of the input and display values.
Changing the Volume from Gallons to Liters
In the above graphic, entering the 48" for the diameter
and 120" for the length of the round horizontal tank,
the meter automatically calculates that the volume of
the tank is 940.02 gallons.
1. Convert gallons to liters
1 US gallon = 3.7854 L
940.02 gal = 3558.4 L
2. Go to the Setup menu and change the decimal
point to 1 decimal.
3. Go to the Program – Scale menu and press Enter
until dis 2 is shown on the Upper display.
4. Press Enter and change the display 2 value to
3558.4.
5. The meter is now displaying the volume in liters.
Note: The display can be scaled to display the volume
The Math menu is used to select the math function
that will determine the channel C value. These math
functions are a combination of input channels A and
B, and will display when channel C is selected in the
Display menu.
The following math functions are available.
Name
Function
Setting
Addition
(A+B+P)*F
Sunm
Difference
(A-B+P)*F
diF
Absolute diff.
((Abs(A-B))+P)*F
diFAbS
Average
(((A+B)/2)+P)*F
AvG
Multiplication
((A*B)+P)*F
nmulti
Division
((A/B)+P)*F
diVide
Max of A or B
((AB-Hi)+P)*F
Hi-Ab
Min of A or B
((AB-Lo)+P)*F
Lo-Ab
Draw
((A/B)-1)*F
drAuw
Weighted avg.
((B-A)*F)+A
uw avg
Ratio
(A/B)*F
ratio
Ratio 2
((B-A)/A)+P)*F
ratio2
Concentration
(A/(A+B))*F
Concen
Math Constants (Const)
The Math Constants menu is used to set the
constants used in channel C math. The math
functions include input channel A and B, as well as
the adder constant P, and factor constant F.
The Adder constant (P) may be set from -99.999 to
999.999.
The Factor constant (F) may be set from 0.001 to
999.999.
The Math Function (nmath) chart above details the
math functions that may be selected in the Math Function menu.
Low-Flow Cutoff (CutofF)
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
999999. The meter will display zero below the cutoff
value. Programming the cutoff value to zero disables
the cutoff feature.
Analog Output Programming
(AoutPr)
The Analog Output Programming menu is used to
program the behavior of the 4-20 mA output. The
following parameters and functions are programmed
in this menu:
1. Source: Source for generating the 4-20 mA
output
2. Overrange: Analog output value with display in
overrange condition
3. Underrange: Analog output value with display in
underrange condition
4. Break: Analog output value when loop break is
detected
5. Max: Maximum analog output value allowed
regardless of input
6. Min: Minimum analog output value allowed
regardless of input
7. Calibrate: Calibrate the internal 4-20 mA source
reference used to scale the 4-20 mA output
Analog Output Source
The analog output source can be based on either of
the input channels (Ch-A, Ch-B), the math channel
(Ch-C), maximum stored value of either input channel
(Hi-A, Hi-B), minimum stored value of either input
channel (Lo-A, Lo-B), relay set points, or the Modbus
input.
Analog Output Calibration
To perform the analog output calibration, it is
recommended to use a milliamp meter with a
resolution of at least 0.1 µA to measure the output
current. The values saved internally during this
procedure are used for scaling the 4-20 mA output in
the Setup menu.
The User menu allows the user to assign the front
panel function keys F1, F2, and F3, the digital input
F4 (a digital input located on the input signal
connector), and up to eight additional digital inputs to
access most of the menus or to activate certain
functions immediately (e.g. reset max & min, hold
relay states, etc.). This allows the meter to be greatly
customized for use in specialized applications.
Up to eight digital outputs can be assigned to a
number of actions and functions executed by the
meter (i.e. alarms, relay acknowledgement, reset
max, min, or max & min, tare, and reset tare). The
digital outputs can be used to trigger external alarms
or lights to indicate these specific events.
Function Keys & Digital I/O
Available Settings
Refer to the following table for descriptions of each
available function key or digital I/O setting.
Display
Description
Rst Hi
Reset the stored maximum display
values for all channels
Rst Lo
Reset the stored minimum display
values for all channels
Rst HL
Reset the stored maximum &
minimum display values for all
channels
Tare A
Capture tare and zero the display for
channel A (A LED flashes – same
rate as M)*
Tare B
Capture tare and zero the display for
channel B (B LED flashes – same
rate as M)*
Rst tr
Reset captured tare and resume
normal operation for both channels A
& B
relay
Directly access the relay menu
Set 1*
Directly access the set point menu
for relay 1 (*through 8)
Rly d
Disable all relays until a button
assigned to enable relays (Rly E) is
pressed
Rly E
Enable all relays to function as they
have been programmed
O Hold
Hold current relay states and analog
output as they are until a button
assigned to enable relays (Rly E) is
pressed
Display
Description
d Hold
Hold the current display value, relay
states, and analog output
momentarily while the function key
or digital input is active. The process
value will continue to be calculated
in the background.
D AbC
Scrolls values for A, B & C when
activated. Keeps the last value for 10
seconds and then it returns to its
assignment. Values are displayed on
display line 1 and the corresponding
channel and units on display line 2.
Ln1 Hi
Display maximum channel A display
value on line 1
Ln1 Lo
Display minimum channel A display
value on line 1
Ln1 HL
Display maximum & minimum
channel A display values on line 1
Ln2 Hi
Display maximum channel B display
value on line 2
Ln2 Lo
Display minimum Channel B display
value on line 2
Ln2 HL
Display maximum & minimum
channel B display values on line 2
LitHLC
Display maximum channel C display
value on line 2
Ln2 HC
Display minimum channel C display
value on line 2
Ln2 HC
Display maximum & minimum
channel C display values on line 2
F On 1*
Force relay 1 (*through 4) into the on
state. This function is used in
conjunction with a digital input
expansion module to achieve
interlock functionality. See Setting
Up the Interlock Relay (Force On)
Feature on page 32 for details.
Contrl
Directly access the control menu
disabl
Disable the selected function key or
digital I/O
AcH
Acknowledge all active relays that
are in a manual operation mode
such as auto-manual or latching
Reset
Directly access the reset menu
nmenu
Mimic the menu button functionality
(digital inputs only)
rigHt
Mimic the right arrow/F1 button
functionality (digital inputs only)
up
Mimic the up arrow/F2 button
functionality (digital inputs only)
Enter
Mimic the enter/F3 button
functionality (digital inputs only)
Alnm 1*
Provide indication when alarm 1
(*through 8) has been triggered
(digital outputs only)
* If math functions are displayed, the math function
The tare function zero’s out the display. In the case of
scale weight, tare is used to eliminate container
weight and provide net weight readings. There are
two tare functions; Capture Tare for channel A and B,
and Reset Tare. Display channel indicator letter
flashes when a tare is used. It will flash until the tare
is reset. The tare can be reset via the Reset menu, a
function key, or a digital input.
Gross (without tare) and net (with tare) values can be
viewed simultaneously. See Setting the Display Parameter & Intensity (dsplay) on page 25.
Internal Calibration (ICAL)
The meter is factory calibrated prior to shipment
for milliamps and volts with calibration equipment
that is certified to NIST standards.
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 and input type must be
recalibrated separately.
Notes:
1. If meter is in operation and it is intended to
accept only one input type (e.g. 4-20 mA),
recalibration of other input is not necessary.
2. 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 and hold the Menu button for three
seconds to access the advanced features of the
meter.
2. Press the Up arrow button to scroll to the Internal calibration menu (ICAL) and press Enter.
3. Select channel A (Ch-A) or channel B (Ch-b) and
press enter.
4. The meter displays either current calibration
(C CAL) or voltage calibration (V CAL), according
to the input setup. Press Enter to start the
calibration process.
Example of Internal Calibration for current
input:
5. The meter displays low input current message
(C lo). Apply the low input signal and press
Enter. The display flashes for a moment while the
meter is accepting the low input signal.
6. 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.
7. Set the display value to correspond to the input
signal being calibrated, typically 4.000 mA.
8. The display moves to the high input calibration
(CHi). Apply the high input signal and press
Enter.
9. Set the display for the high input calibration, in
the same way as it was set for the low input
calibration, typically 20.000 mA.
The graphic shows the calibration of the current input.
The voltage input is calibrated in a similar way.
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 should be less than high input
signal.
Error Message (Error)
An error message indicates that the calibration or
scaling process was not successful.
After the error message is displayed, the meter
reverts to input 2 during calibration or scaling and to
input 1 during internal calibration, allowing the
appropriate input signal to be applied or programmed.
The error message might be caused by any of the
following conditions:
5. Input signal is not connected to the proper
terminals or it is connected backwards.
6. Wrong signal selection in Setup menu.
7. Minimum input span requirements not
maintained.
8. 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.
The meter is capable of accepting two input channels
(A and B) of either current (0-20 mA, 4-20 mA) or
voltage signals (0-5 V, 1-5 V, 0-10 V, 10 V) and
displaying these signals in engineering units from 99999 to 999999 (e.g. a 4-20 mA signal could be
displayed as -50.000 to 50.000).
A math function channel (C) is available to perform
operations on channel A and B, with adder and factor
constants, and display the results. Engineering units or
tags may be displayed with these three channels.
The dual-line display can be customized by the user.
Typically, the upper display is used to display the math
channel C, while the lower display is used to alternate
between displaying input channels A and B.
Additionally, the meter can be set up to display any
input or math channel on the upper display and a unit
or tag on the lower display. The relays and analog
output can be programmed to operate based on any
input or math channel.
Front Panel Buttons Operation
Button
Symbol
Description
Press to enter or exit Programming
Mode, view settings, or exit max/min
readings
Press to reset max/min readings or
other parameter/function assigned
through the User menu
Press to display max/min readings or
other parameter/function assigned
through the User menu
Press to acknowledge relays or other
parameters/function assigned through
the User menu
Function Keys Operation
During operation, the programmable function keys
operate according to the way they have been
programmed in the Advanced Features – User menu.
See Programmable Function Keys User Menu (user)
on page 40 for details.
The table above shows the factory default settings for
F1, F2, and F3.
F4 Operation
A digital input, F4, is standard on the meter. This
digital input is programmed identically to function keys
F1, F2, and F3. The input is triggered with a contact
closure to COM, or with an active low signal. During
operation, F4 operates according to the way is has
been programmed in the Advanced Features – User
menu. See Programmable Function Keys User Menu
(user) on page 40 for details.
Maximum/Minimum Readings
The max & min readings (peak & valley) reached by
the process can be displayed either continuously or
momentary:
1. Display briefly by assigning to the F1-F3
function keys or to the digital inputs in the
User menu.
2. Display continuously by assigning either
display to max/min through the Display
menu.
Any of the F1-F3 function keys (buttons) and the
digital inputs can be programmed to reset the max &
min readings. The meters are set at the factory to
display the max reading by pressing the Up arrow/F2
button and to use the Right arrow/F1 button to access
the Reset menu.
To display max and min channel A reading using
function key with factory defaults:
1. Press Up arrow/F2 button to display minimum
reading of channel A since the last reset/powerup. The display will then display the maximum
reading of channel A since the last reset/powerup.
2. Press the Up arrow/F2 button again to display the
minimum reading of channel A since the last
reset/power up.
3. To reset max/min press Right arrow/F1 button to
access the Reset menu. The max & min displays
are reset to actual values.
The rugged design and the user-friendly interface of
the meter should make it unusual for the installer or
operator to refer to this section of the manual.
However, 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 recommendations below.
Diagnostics Menu (diag)
The Diagnostics menu is located in the Advanced
Features menu, to access Diagnostics menu see
Advanced Features Menu, page 35.
This menu allows the user to test the functionality of
all the meter LEDs, check the meter’s software and
version information, and erase the MeterView Pro
software installation files from the meter. Press the
Enter button to view the settings and the Menu button
to exit at any time.
For a description of the diagnostic messages, see Advanced Features Menu & Display Messages, page
35.
Determining Software Version
To determine the software version of a meter:
1. Go to the Diagnostics menu (diAG) and
press Enter button.
2. Press Up arrow button and scroll to
Information menu (Info).
3. Press Enter to access the software number
(SFT) and version (UER) information. Write
down the information as it is displayed.
Continue pressing Enter until all the
information is displayed.
4. The meter returns to Run Mode after
displaying all the settings.
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 35.
2. Press Up arrow to go to Diagnostics menu
3. Press and hold Right arrow for three seconds,
press Enter when display flashes reset.
Note: If Enter is not pressed within three
seconds, the display returns to Run Mode.
4. The meter goes through an initialization
sequence (similar as on power-up), and loads the
factory default settings.
Factory Defaults & User Settings
The following table shows the factory setting for most
of the programmable parameters on the meter.
This meter is a highly sophisticated instrument with an extensive list of features and capabilities. If the front panel
buttons are used to program the meter, it may be a difficult task to keep everything straight. That is why we strongly
recommend the use of the free MeterView Prosoftware for all programming activities. A cable is provided with the
meter for programming with MeterView Pro software.
If you have programmed the meter with the front panel buttons and it is not working as intended, try
re-programming the meter using MeterView Pro software.
Symptom
Check/Action
No display at all
Check power at power connector
Not able to change setup or
programming, Locd is displayed
Meter is password-protected, enter correct six-digit password to unlock
Meter does not respond to input
change
If a Low-Flow Cutoff Value has been programmed, the meter will
display zero below that point, regardless of the input – which can
appear like the meter is not responding to an input change. Check to
make sure the problem is not being caused by an undesired low-flow
cutoff value.
Meter displays error message during
calibration (Error)
Check:
1. Signal connections
2. Input selected in Setup menu
3. Minimum input span requirements
Meter displays
1. 999999
2. -99999
Check:
1. Input selected in Setup menu
2. Corresponding signal at Signal connector
Display is unstable
Check:
1. Input signal stability and value
2. Display scaling vs. input signal
3. Filter and bypass values (increase)
Display response is too slow
Check filter and bypass values
Display reading is not accurate
Check:
1. Input signal conditioner selected: Linear, square root, etc.
2. Scaling or calibration
Display does not respond to input
changes, reading a fixed number
Check:
1. Display assignment, it might be displaying max, min, or set point.
Display alternates between
1. Hi and a number
2. Lo and a number
Press Menu to exit max/min display readings.
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
Flashing relay status LEDs
Relays in manual control mode or relay interlock switches opened.
Meter not communicating with
application programs
Check:
1. Serial adapter and cable
2. Serial settings
3. Meter address and baud rate
If the display locks up or the meter
does not respond at all
Cycle the power to reboot the microprocessor.
Other symptoms not described above
Call Technical Support for assistance.
Note: Certain sequences of events can cause unexpected results. To solve these issues, it is best to start fresh from
factory defaults and use the manual as a step by step programming guide, rather than a random approach to
programming. To reset the meter to factory defaults, see Reset Meter to Factory Defaults on page 43. In addition, for
best results, we recommend using the free MeterView Pro software for all programming needs.