Page 1
ProtEX-MAX PD8-6100 Explosion-Proof Strain
Strain Gauge
USB Install
Gauge, Load Cell & mV Meter Instruction Manual
• 15, 30, 150, 300 mV Unipolar Input Ranges
• ±15, ±25, ±150, ±250 mV Bipolar Input Ranges
• Capture or Programmable Tare Feature
• Auto-Zero Feature Eliminates Zero Drift
• Ratiometric Operation
• Max/Min or Peak/Valley Hold Feature
• Display One Input in Two Different Scales (e.g. Weight & Volume)
• Rounding Function 1, 2, 5, 10, 20, 50, or 100
• Dual-Line Display
• Selectable 5 or 10 VDC Sensor Excitation
• Modern, Sleek and Practical Enclosure
• Display Mountable at 0°, 90°, 180°, & 270° Degrees
• Explosion-Proof, IP68, NEMA 4X Enclosure
• Input Power Options Include 85-265 VAC or 12-24 VDC
• SafeTouch® Through-Glass Button Programming
• Flanges for Wall or Pipe Mounting
• Superluminous Sunlight Readable Display
• Free USB Programming Software & Cable
Precision Digital Corporation
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Disclaimer
CAUTION: Read complete
instructions prior to installation
and operation of the meter.
WARNING: Risk of
electric shock or
personal injury.
Warning!
• 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.
• Failure to follow installation guidelines could result in death or
serious injury. Make sure only qualified personnel perform the
installation.
• Never remove the instrument cover in explosive environments
when the circuit is live.
• Cover must be fully engaged to meet flameproof/explosion-proof
requirements.
• Information in this manual supersedes all enclosure, compliance,
and agency approval information included in additional product
manuals included with this product.
!
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.
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.
Registered Trademarks
Find Quality Products Online at: [email protected]
MeterView® Pro is a registered trademark of Precision Digital Corporation. Modbus® is a
Registered Trademark of Schneider Automation Inc. All other trademarks mentioned in
this document are the property of their respective owners.
© 2018 Precision Digital Corporation. All rights reserved.
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Page 3
ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Table of Contents
Table of Contents .................................................. 3
Table of Figures .................................................... 4
Introduction ........................................................... 4
Ordering Information ............................................ 5
Specifications ........................................................ 6
General ....................................................................... 6
Strain Gauge Input ...................................................... 7
Relays ......................................................................... 7
Isolated 4-20 mA Transmitter Output .......................... 7
Digital Inputs & Outputs .............................................. 8
Serial Communications ............................................... 8
MeterView Pro ............................................................. 8
Product Ratings and Approvals; .................................. 9
Compliance Information ..................................... 10
Safety ........................................................................ 10
Electromagnetic Compatibility ................................... 10
Safety Information ............................................... 11
Installation ........................................................... 11
Unpacking ................................................................. 11
Pre-Installed Conduit/Stopping Plug ......................... 12
Mounting ................................................................... 12
Cover Jam Screw ...................................................... 12
Sensor Excitation Voltage Selection (EX+, EX-) ....... 12
Connections .............................................................. 13
Required & Factory Wired Connection .................. 13
Connectors Labeling ............................................. 14
Power Connections ............................................... 14
Signal Connections ............................................... 15
Switch Configuration ................................................. 15
Shunt Calibration ................................................... 17
Serial Communications Connections .................... 18
Using PROVU Serial Adapters ................................ 20
Relay Connections ................................................ 21
Switching Inductive Loads ..................................... 21
4-20 mA Output Connections ................................ 22
Analog Output Power Supply ................................ 22
F4 Digital Input Connections ................................. 22
Interlock Relay Feature ......................................... 22
Digital I/O Connections ......................................... 23
External Switch Contacts ...................................... 23
Setup and Programming .................................... 24
SafeTouch
Front Buttons and Status LED Indicators .................. 25
MeterView
MeterView Pro Installation..................................... 26
Display Functions & Messages ................................. 27
Setting Numeric Values ............................................. 29
Main Menu ................................................................ 29
Setting Up the Meter (setup) .................................... 30
Setting the Input Signal (
Setting the Input Units (
Setting the Input Units or Custom Tags (
Programming the Meter (
Calibrating the Meter with Strain Gauge/Load Cell
(
Cal
Setting the Display Parameter & Intensity (
.............................................................................. 36
Setting the Relay Operation (relay) ......................... 37
Setting the Relay Action ........................................ 38
®
Buttons .................................................. 24
®
Pro Software .......................................... 26
Input
) ............................ 31
units
) .............................. 32
units
) ... 33
prog
) ............................. 34
) ...................................................................... 34
dsplay
)
Programming Set and Reset Points ....................... 39
Setting Fail-Safe Operation .................................... 39
Programming Time Delay ...................................... 39
Relay and Alarm Operation Diagrams ....................... 39
High Alarm Operation (Set > Reset) ...................... 39
Low Alarm Operation (Set < Reset) ....................... 39
High Alarm with Fail-Safe Operation (Set > Reset) 40
Low Alarm with Fail-Safe Operation (Set < Reset) 40
Pump Alternation Control Operation ...................... 40
Relay Sampling Operation ..................................... 41
Time Delay Operation ............................................ 41
Relay Operation Details ............................................. 42
Overview ................................................................ 42
Relays Auto Initialization ........................................ 42
Fail-Safe Operation ................................................ 42
Front Panel LEDs................................................... 42
Latching and Non-Latching Relay Operation ......... 43
Non-Latching Relay (
Non-Latching Relay (
Latching Relay (
Latching Relay (
Acknowledging Relays ........................................... 44
Pump Alternation Control Applications (
Setting Up the Interlock Relay (Force On) Feature 46
Scaling the 4-20 mA Analog Output (Aout) ............... 46
Setting Up the Password (pass) ................................ 47
Protecting or Locking the Meter ............................. 47
Making Changes to a Password Protected Meter .. 47
Disabling Password Protection .............................. 47
Reset Menu (reset) .................................................. 48
Tare Menu (Tare) ...................................................... 48
Tare Functionality (
Control Menu (Contrl) .............................................. 48
Advanced Features Menu .......................................... 49
Advanced Features Menu & Display Messages .... 49
Noise Filter (
Noise Filter Bypass (
Rounding Feature (
Modbus RTU Serial Communications (
Serial Communications Overview .......................... 51
Select Menu (
Signal Input Conditioning (
Auto-Zero (
Low Cutoff (
Analog Output Programming (
Programmable Function Keys User Menu (
Internal Source Calibration (
Error Message (
filter
Auto 0
CutofF
Auto
) .................................... 43
A-man
LatcH
Lt-Clr
) ............................... 43
) .......................................... 43
) ........................................ 43
Altern
tare
) ....................................... 48
) ............................................. 50
bypass
) ................................. 50
round
) ..................................... 50
serial
SElect
) ............................................ 53
Functn
) ........................ 53
) ................................................ 53
) .............................................. 54
AoutPr
) .................. 54
ICAL
) ......................... 56
error
) .......................................... 57
) ..... 51
user
) ... 44
) .. 54
Meter Operation ................................................... 58
Front Buttons Operation ............................................. 58
SafeTouch
Function Keys Operation ........................................... 59
Maximum/Minimum Readings .................................... 59
®
Buttons ................................................... 58
Troubleshooting .................................................. 60
Diagnostics Menu (diag) ........................................... 60
Determining Software Version ............................... 60
Reset Meter to Factory Defaults ................................ 60
Factory Defaults & User Settings ........................... 61
Troubleshooting Tips (Including FAULT & ERROR
Messages) ................................................................... 62
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Service.................................................................. 63
EU Declaration of Conformity ............................ 65
Mounting Dimensions ......................................... 64
Table of Figures
Figure 1. Sensor Excitation Voltage Selection ......... 12
Figure 2: Integrated ProVu Required Connections .. 13
Figure 3. Connector Labeling for Fully Loaded PD8-
6100 ...................................................................... 14
Figure 4. Power Connections ..................................... 14
Figure 5. Strain Gauge Configuration Switch ........... 15
Figure 6. Strain Gauge Powered by Internal Supply 16
Figure 7. Strain Gauge Powered by External Supply 16
Figure 8. mV Transducer Input Connections ............ 17
Figure 9. Shunt Resistor ............................................. 17
Figure 10: ProtEX-MAX Connections to a Serial
Converter ............................................................. 18
Figure 11. Three-Wire RS485 Connection ................. 18
Figure 12: RS-485 Wiring ............................................ 19
Figure 13: RS-485 Two-Wire Multi-Drop Wiring ........ 20
Figure 14. Relay Connections ..................................... 21
Figure 15. AC and DC Loads Protection .................... 21
Figure 16. Low Voltage DC Loads Protection ........... 21
Figure 17. 4-20 mA Output Connections .................... 22
Figure 18. F4 Digital Input Connections .................... 22
Figure 19. Interlock Connections ............................... 22
Figure 20: Digital I/O Connections ............................. 23
Figure 21. Acknowledge Relays with Digital Input.... 44
Figure 22: General Four-Wire Network Connection .. 52
Figure 23: General Two-Wire Network Connection... 52
Figure 24: Enclosure Dimensions – Front View ........ 64
Figure 25: Enclosure Dimensions – Side Cross
Section View ......................................................... 64
Introduction
The ProtEX-MAX PD8-6100 offers all the functionality of the ProVu PD6100 as a fully FM, CSA,
ATEX, and IECEx approved explosion-proof product. It accepts strain gauge & load cell inputs
and mV signals up to 300 mV (unipolar) and ± 250 mV (bipolar) for weight and force
measurement applications. The PD8-6100 strain gauge meter’s dual-line display and powerful
dual-scale capability allows the measurement to be displayed in two different units of measure.
Another use for the PD8-6100’s dual-lines is to simply display the units of measure on the bottom
line. SafeTouch® through-glass buttons allow for access to zero, tare, and other functions without
the need to remove the enclosure cover.
4
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
85-265 VAC Model
12-24 VDC Model
Options Installed
PD8-6100-6H0
PD8-6100-7H0
No options
PD8-6100-6H7
PD8-6100-7H7
4 relays & 4-20 mA output
Model
Description
PDA1232
RS-232 serial adapter
PDA1485
RS-485 serial adapter
PDA7485-I
RS-232 to RS-422/485 isolated converter
PDA8485-I
USB to RS-422/485 isolated converter
PDX6901
Suppressor (snubber): 0.01 µF/470 , 250 VAC
Ordering Information
SunBright Display Models
Accessories
WARNING - Cancer and Reproductive Harm - www.P65Warnings.ca.gov
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Display
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
Display
Update Rate
5/second (200 ms)
Overrange
Display flashes 999999
Underrange
Display flashes -99999
Display
Assignment
The displays may be assigned to
PV1, PV2, PCT, max & min, set
points, PV & units, units (lower
display only), net & gross weight,
Modbus input, and display millivolts.
Units
lb, kg, ounce, gram, ton, metric ton
(tonne), custom units.
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
Rounding
Select 1, 2, 5, 10, 20, 50, or 100
(e.g. rounding = 10, value = 123.45,
display = 123.50).
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.
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 non-volatile memory for a
minimum of ten years if power is lost.
Connections
Screw terminals accept 12 to 22 AWG
wire
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-to-power line
500 V input-to-output (powered by
external supply)
Overvoltage
Category
Installation Overvoltage Category II:
Local level with smaller transient
overvoltages than Installation
Overvoltage Category III.
Environmental
T6 Class operating temperature
range Ta = -40 to 60°C
T5 Class operating temperature
range Ta = -40 to 65°C
Max Power
Dissipation
Maximum power dissipation limited
to 15.1 W.
Enclosure
Explosion-proof die cast aluminum with
glass window, corrosion resistant epoxy
coating, color: blue.
NEMA 4X, 7, & 9, IP68.
Default conduit connections: Four ¾" NPT
threaded conduit openings and two ¾"
NPT metal conduit plugs with 12 mm hex
key fitting installed. Additional conduit
opening configurations may be available;
verify quantity and sizes on specific
device labeling during installation.
Mounting
Four slotted flanges for wall mounting or
NPS 1½" to 2½" or DN 40 to 65 mm pipe
mounting. See Mounting Dimensions on
page 64.
Tightening
Torque
Screw terminal connectors: 5 lb-in (0.56
Nm)
Overall
Dimensions
6.42" x 7.97" x 8.47" (W x H x D)
(163 mm x 202 mm x 215 mm)
Approximate
Shipping Weight
16.0 lbs (7.26 kg)
Warranty
3 years parts & labor
Specifications
Except where noted all specifications apply to operation at +25°C.
General
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Page 7
ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Inputs
Field selectable: 0-15, 0-30, 0-150, 0300 mV,
±15, ±25, ±150, ±250 mV, or Modbus
PV (Slave)
Accuracy
±0.03% of calibrated span ±1 count
Temperature
Drift
0.002% of calibrated span/C max
from 0 to 65C ambient,
0.005% of calibrated span/C max
from -30 to 0C ambient
Functions
Linear with multi-point linearization
Multi-Point
Linearization
2 to 32 points for PV or PV1
2 to 8 points for PV2 (Dual-scale
feature)
Low Cutoff
0-999999 (0 disables cutoff function)
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 & Input 2
15 mV
0.2 mV
25 mV, 30 mV
0.4 mV
150 mV
2.0 mV
250 mV, 300 mV
4.0 mV
An Error message will appear if the
input 1 and input 2 signals are too
close together.
Input
Impedance
Strain Gauge Bridge: Greater than
10 MΩ
mV Source: 200 kΩ
Isolated
Excitation
Power Supply
Terminals Ex+ & Ex- may be used for
sensor excitation, 10 VDC or 5 VDC
±10% @ 25 mA max. Field
selectable for 10 VDC excitation
voltage to operate up to two 1000 Ω
strain gauges, or 5 VDC excitation
voltage to operate up to four 1000 Ω
strain gauges or one 350 Ω strain
gauge.
For safe area only, not agency
approved installations, Ex+ & Ex-
may be used for sensor excitation;
10 VDC or 5 VDC ±10% @ 350 mA
max.
Rating
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 page 21 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)
Latching (requires manual
acknowledge)
Sampling (based on time)
Pump alternation control (2 to 4
relays)
Off (disable unused relays and
enable Interlock feature)
Manual on/off control mode
Relay Reset
User selectable via front panel
buttons or digital inputs
1. Automatic reset only (nonlatching), when the input passes
the reset point.
2. Automatic + manual reset at any
time (non-latching)
3. Manual reset only, at any time
(latching)
4. Manual reset only after alarm
condition has cleared (L)
Note: Front panel button or digital
input may be assigned to
acknowledge relays
programmed for manual reset.
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.
Output Source
Process variable (PV), max, min, set
points 1-4, Modbus input, or manual
control mode
Scaling Range
1.000 to 23.000 mA for any display
range
Calibration
Factory calibrated: 0.00 to 100.00 =
4-20 mA output
Analog Output
Programming
1.000 mA minimum and 23.000 mA
maximum for all parameters:
overrange, underrange, max, min,
and break
Accuracy
± 0.1% of span ± 0.004 mA
Strain Gauge Input
Isolated 4-20 mA Transmitter Output
Relays
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Page 8
ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
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.
Non-Isolated
Transmitter
Power Supply
Terminals I+ & R: 24 VDC 10% .
May be used to power the 4-20 mA
output or other devices
(except load
cell/strain gauge). Refer to Figure 3 on
page 14 and Figure 17 on page
22.
All models @ 25mA max.
External Loop
Power Supply
35 VDC maximum
Output Loop
Resistance
Power supply
24 VDC
35 VDC
(external)
Minimum
10
100
Maximum
700
1200
Channels
4 digital inputs & 4 digital outputs
Digital Input
Logic High
3 to 5 VDC
Digital Input
Logic Low
0 to 1.25 VDC
Digital Output
Logic High
3.1 to 3.3 VDC
Digital Output
Logic Low
0 to 0.4 VDC
Source
Current
10 mA maximum output current
Sink
Current
1.5 mA minimum input current
+5 V
Terminal
To be used as pull-up for digital inputs
only.
Connect normally open pushbuttons
across +5 V & DI 1-4.
WARNING
DO NOT use +5 V
terminal (pin 1) to power
external devices.
Function
Assignment
The on-board digital inputs (1-4) are
designed to mimic the behavior of the
front panel buttons (Menu, F1, F2, &
F3).
If you wish to change their behavior, reassign F1-F3 to the desired function,
then change the corresponding digital
input to match.
Compatibility
EIA-485
Connectors
Removable screw terminal connector
Max Distance
3,937' (1,200 m) max
Status Indication
Separate LEDs for Power (P), Transmit
(TX), and Receive (RX)
Slave ID
1 – 247 (Meter address)
Baud Rate
300 – 19,200 bps
Transmit
Time Delay
Programmable between 0 and 199
ms or transmitter always on for RS422 communication
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)
Note: Refer to the PROVU® Modbus Register Tables
located at www.predig.com for details.
System
Requirements
Microsoft® Windows® XP/Vista/7/8/10
Communications
USB 2.0 (Standard USB A to Micro USB
B)
Configuration
Configure device settings one at a time
Serial Communications
Digital Inputs & Outputs
MeterView Pro
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
FM
Enclosure: Type 4X; IP66
Class I, Division 1, Groups B, C, D
Class II, Division 1, Groups E, F, G
Class III, Division 1, T5/T6
Class I, Zone 1, AEx d, IIC Gb T5/T6
Zone 21, AEx tb IIIC T90°C; Ta -40°C to +65°C
T6 Ta = -40°C to +60°C; T5 Ta = -40°C to +65°C
Certificate Number: 3047283
CSA
Class I, Division 1, Groups B, C, D
Class II, Division 1, Groups E, F, G
Class III, Division 1
Class I Zone 1 Ex d IIC
Zone 21 Ex tb IIIC T90°C
-40°C < Tamb. < +60° C; Temperature Code T6
-40°C < Tamb. < +65° C; Temperature Code T5
Enclosure Type 4X & IP66
Certificate Number: 2531731
ATEX
II 2 G D
Ex d IIC T* Gb
Ex tb IIIC T90°C Db IP68
Ta = -40°C to +*°C
*T6 = -40°C to +60°C
*T5 = -40°C to +65°C
Certificate number: Sira 12ATEX1182
IECEx
Ex d IIC T* Gb
Ex tb IIIC T90°C Db IP68
Ta = -40°C to +*°C
*T6 = -40°C to +60°C
*T5 = -40°C to +65°C
Certificate Number: IECEx SIR 12.0073
Product Ratings and Approvals;
Special Conditions for Safe Use:
Use suitably certified and dimensioned cable entry device and/or plug. The equipment shall be
installed such that the supply cable is protected from mechanical damage. The cable shall not
be subjected to tension or torque. If the cable is to be terminated within an explosive
atmosphere, then appropriate protection of the free end of the cable shall be provided. Cable
must be suitable for 90°C.
Year of Construction
This information is contained within the serial number with the first four digits representing the
year and month in the YYMM format.
For European Community: The ProtEX-MAX must be installed in accordance with the ATEX
directive 94/9/EC, and the product certificate Sira 12ATEX1182.
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Page 10
ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
UL & c-UL Listed
USA & Canada
UL 508 Industrial Control Equipment
UL File Number
E160849
Front Panel
UL Type 4X, NEMA 4X, IP65; panel gasket provided
Low Voltage
Directive
EN 61010-1:2010
Safety requirements for measurement, control, and laboratory use
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)
Power-Frequency
Magnetic Field
30 A/m 70%V for 0.5 period
Voltage Dips
40%V for 5 & 50 periods
70%V for 25 periods
Voltage Interruptions
<5%V for 250 periods
Compliance Information
Safety
Electromagnetic Compatibility
Note:
Testing was conducted on PD8-6100 meters installed through the covers of grounded metal
enclosures with cable shields grounded at the point of entry representing installations designed to
optimize EMC performance.
Declaration of Conformity available at www.predig.com
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
WARNINGS
• Read complete instructions prior to installation and operation of the instrument.
• Installation and service should be performed only by trained service personnel. Service
requiring replacement of internal sub-components must be performed at the factory.
• Disconnect from supply before opening enclosure. Keep cover tight while circuits are alive.
Conduit seals must be installed within 18" (450mm) of the enclosure or within 2" (50mm) for
Zone installations.
• Verify that the operating atmosphere of the instrument is consistent with the appropriate
hazardous locations certifications.
• If the instrument is installed in a high voltage environment and a fault or installation error
occurs, high voltage may be present on any lead
• Read all product labels completely and follow all instructions and requirements listed on the
labels for installation or service.
WARNING
Disconnect from supply before opening enclosure. Keep
cover tight while circuits are alive. Conduit seals must be
installed within 18" (450mm) of the enclosure or within 2"
(50mm) for Zone installations.
Safety Information
Installation
Install in accordance with applicable local and national regulations (e.g. NEC).
For Installation in USA: The ProtEX-MAX must be installed in accordance with the National Electrical
Code (NEC) NFPA 70.
For Installation in Canada: The ProtEX-MAX must be installed in accordance with the Canadian
Electrical Code CSA 22.1. All power supplies below 36 V and input circuits must be derived from a CSA
Approved Class 2 source.
For European Community: The ProtEX-MAX must be installed in accordance with the ATEX directive
94/9/EC and the product certificate Sira 12ATEX1182.
Wiring connectors are accessed by opening the enclosure. To access electrical connectors, remove the 2
captive screws and then remove the electronics module. Connectors are on the rear of the electronics
module.
Unpacking
Remove the instrument from packing box. Inspect the packaging and contents for damage. Report
damages, if any, to the carrier.
If any part is missing or the instrument malfunctions, please contact your supplier or the factory for
assistance.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
WARNING
In hazardous areas, conduit and conduit/stopping plugs require
the application of non-setting (solvent free) thread sealant. It is
critical that all relevant hazardous area guidelines be followed
for the installation or replacement of conduit or plugs.
WARNING
Do not attempt to loosen or remove flange bolts
while the instrument is in service.
Caution!
Do not use 24V to power a strain gauge
bridge. The 24 V jumper configuration should
only be used for mV input applications.
!
24V
10V
J3
5V
10V
J4
Pre-Installed Conduit/Stopping Plug
The PD8-6000 is supplied with two pre-installed conduit plugs for installations that do not require the use
of all conduit entries. The conduit/stopping plugs include an internal 12mm hexagonal socket recess for
removal. The pre-installed plugs and their installation are included in the hazardous area approvals for
the PD8 Series enclosure.
Mounting
The ProtEX-MAX has four slotted mounting flanges that should be used for pipe mounting or wall
mounting. Refer to Mounting Dimensions, page 64 for details.
Cover Jam Screw
The cover jam screw should be properly installed once the instrument has been wired and tested in a
safe environment. The cover jam screw is intended to prevent the removal of the instrument cover in a
flameproof environment without the use of tools. Using a M2 hex wrench, turn the screw clockwise until
the screw contacts the aluminum enclosure. Turn the screw an additional 1/4 to 1/2 turn to secure the
cover. Caution: Excess torque may damage the threads and/or wrench.
Sensor Excitation Voltage Selection (EX+, EX-)
All meters, including models equipped with the 12-24 VDC power option, are shipped from the factory
configured to provide 10 VDC excitation for the sensor.
If the sensor requires 5 VDC excitation, the internal jumper J3 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 ½ inches.
4. Configure the J3 jumper, located behind the input signal connector, for the desired excitation
voltage as shown.
Figure 1. Sensor Excitation Voltage Selection
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
WARNINGS
• Static electricity can damage sensitive components.
• Observe safe handling precautions for static-sensitive components.
• Use proper grounding procedures/codes.
• If the instrument is installed in a high voltage environment and a
fault or installation error occurs, high voltage may be present on
any lead or terminal.
• Follow all fusing and wiring precautions requirements for the
instrument integrated to the PD8 Series model number being
connected.
WARNING
Observe all safety regulations. Electrical wiring should be performed
in accordance with all agency requirements and applicable national,
state, and local codes to prevent damage to the meter and ensure
personnel safety.
Connections
To access the connectors, remove the enclosure cover and unscrew the two captive screws that fasten
the electronics module. Signal connections are made to de-pluggable connectors on the back of the
electronics module.
Some connectors may be provided already connected. These connections are required for proper
operation of the ProtEX-MAX, and should not be removed unless instructed to by this manual.
Wires marked as being used for testing purposes should be removed.
Grounding connections are made to the two ground screws provided on the base – one internal and one
external.
After all connections have been completed and verified, apply power to the unit.
Required & Factory Wired Connection
The ProtEX-MAX comes with a pre-wired connection. This connection is detailed below, and must be
maintained in order for the instrument to function properly.
Figure 2: Integrated ProVu Required Connections
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Warning!
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.
SG- SG+
AC or DC
POWER
Required External Fuse:
5 A max, 250 V Slow Blow
POWER
+
-
Connectors Labeling
The connectors’ label, affixed to the meter, shows the location of all connectors available with requested
configuration.
Figure 3. Connector Labeling for Fully Loaded PD8-6100
Power Connections
Power connections are made to a two-terminal connector labeled POWER on Figure 3. The meter will
operate regardless of DC polarity connection. The + and - symbols are only a suggested wiring convention.
Figure 4. Power Connections
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Switch 1
ON
Excitation
Internal
Excitation
When switch is turned ON, the
ProVu's power supply is used.
OFF
Excitation
External
Excitation
When switch is turned OFF, an
external power supply is used.
Switch 2
ON
Range
Higher
internal gain
Turn this switch ON for the following input
ranges: 15, 30, ±15, or ±25 mV.
OFF
Range
Lower
internal gain
Turn this switch OFF for the following input
ranges: 150, 300, ±150, or ±250 mV.
Switch 3
ON
Polarity
Range starts at
zero (unipolar)
Turn this switch ON for the following
input ranges: 15, 30, 150, or 300.
OFF
Polarity
Range starts below
zero (bipolar)
Turn this switch OFF for the following
input ranges:
±15, ±25, ±150, or ±250
mV.
Switch 4
ON
Source
Source is mV
input transducer
Turn this switch ON if the
connected source is a transducer*
OFF
Source
Source is strain
gauge bridge
Turn this switch OFF if the source
is a strain gauge bridge
3 4
SG- SG+
Signal Connections
Signal connections are made to a six-terminal connector labeled SIGNAL on Figure 3. The EX- (negative
excitation) terminal is used to sense the sensor excitation voltage for ratiometric operation, when the
sensor is powered externally.
Switch Configuration
Setup and programming is performed both through the front panel buttons and switch settings shown below.
The switch configuration must correspond to the setup and programming starting on page 29 (same range,
type, etc.).
Figure 5. Strain Gauge Configuration Switch
Excitation (Switch 1)
The excitation switch designates whether the meter will use its internal power supply or an external power
supply.
Range (Switch 2)
The range switch adjusts the gain of the internal circuitry. Narrower ranges require more amplification.
Polarity (Switch 3)
The polarity switch selects whether the range is unipolar and starts at zero (i.e. 0 to 30 mV) or bipolar and
starts at a negative value, or below zero (i.e. -15 to +15 mV).
Source (Switch 4)
The source switch tells the ProVu whether the input is a strain gauge bridge (i.e. Figure 11), or it is a
signal from a 2 or 4 wire transducer, or mV source (i.e. Figure 12)
*Ratio should be set to NO in Setup Input Menu
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Switch 5
ON
Shunt
Shunt resistor is connected to
the input bridge.
Turn switch ON when you
want to simulate a strain load
OFF
Shunt
Shunt resistor is disconnected
from the input bridge.
Turn this switch OFF to
remove the shunt resistor
Shunt Resistor (Switch 5)
The PD8-6100 provides a means of simulating strain in a strain gauge bridge circuit via a 60.4KΩ shunt
resistor included in the meter. This will simulate an approximate 70% full-scale load in the case of a 350Ω
strain bridge.
Strain Gauge Connections
The following figures show examples of strain gauge connections.
There is a 5-position DIP switch (CONFIG) to set up the input ranges and ratiometric operation.
NOTE: Refer to Switch Configuration starting on page 15 for proper configuration switch
positioning.
Figure 6. Strain Gauge Powered by Internal Supply
NOTE: Refer to Switch Configuration starting on page 15 for proper switch positioning for the
following wiring configurations.
Figure 7. Strain Gauge Powered by External Supply
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Notes
• Two-wire mV signals: Connect positive
to SG+ and negative to SG-
• Four-wire transducer: Connect EX- to
negative power transducer terminal.
Figure 8. mV Transducer Input Connections
Shunt Calibration
The PD8-6100 is equipped with a means of simulating strain in a strain gauge bridge circuit, via an
included shunt resistor in the meter. This technique is performed by enabling the “shunt resistor” switch
(switch 5), which in turn shunts one leg of a connected strain bridge with a predetermined resistive load
(60.4k). This technique can be used as a means of verifying instrumentation by simulating a physical
input. With no load connected, the enabling of the shunt resistor (switch 5) will simulate approximately a
70% F.S. load in the case of a 350Ω Strain Bridge.
Figure 9. Shunt Resistor
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
ProtEX-MAX to RS-485
Serial Converter Connections
RS-485 Serial
Converter
ProtEX-MAX RS485 Connections
DO DI DO DI DI DO DI DO
F4 COM DI DI DO DO
TX
RX
1 2 3 4 51 2
Serial Communications Connections
The ProtEX-MAX has a 5 position terminal block for connecting RS-485 serial devices.
Figure 10 details the wiring connections from the ProtEX-MAX to an RS-485 serial converter (such as the
PDA7485 or PDA8485) for a four-wire network.
Figure 10: ProtEX-MAX Connections to a Serial Converter
The ProtEX-MAX has three diagnostic LEDs: a Power (P) LED to show when the module is powered
properly, a Transmit Data (TX) LED to show when the module is being transmitted to by the PC side, and
a Receive Data (RX) LED to show when the module is sending data to a receiving device.
The following diagrams detail how to connect the RS-485 serial communications from the ProtEX-MAX to
a RS-485/RS-232 serial converter (PDA7485) in four wire and two wire configurations.
Three Wire Connections
In order to wire the 5 pins for use as a 3-wire half-duplex RS-485 connection, it is necessary to create a
jumper connection between DI – DO and DI- – DO- as shown below.
Figure 11. Three-Wire RS485 Connection
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
WARNING
Observe all safety regulations. Electrical wiring should be performed
in accordance with all agency requirements and applicable national,
state, and local codes to prevent damage to the meter and ensure
personnel safety.
Figure 12: RS-485 Wiring
Notes:
1. Termination resistors are optional and values depend on the cable length and characteristic
impedance. Consult the cable manufacturer for recommendations.
2. Refer to RS-232 to RS-485 Converter documentation for further details.
3. Use shielded cable, twisted-pairs plus ground. Connect ground shield only at one location.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
WARNING
Observe all safety regulations. Electrical wiring should be performed
in accordance with all agency requirements and applicable national,
state, and local codes to prevent damage to the meter and ensure
personnel safety.
NOTICE
PROVU expansion modules and serial adapters are not included in
the hazardous area approvals of the ProtEX-MAX. The PDA1232
and PDA8008 may be used only while the ProtEX-MAX is in a
safe area, and will disable some features while installed.
!
Notes:
1. Termination resistors are optional and values depend on the cable length and characteristic
impedance. Consult the cable manufacturer for recommendations.
2. Refer to RS-232 to RS-485 Converter documentation for further details.
3. Use shielded cable, twisted-pair plus ground. Connect ground shield only at one location.
Figure 13: RS-485 Two-Wire Multi-Drop Wiring
When using more than one instrument in a multi-drop or multi-point mode, each meter must be provided
with its own unique address. See Modbus RTU Serial Communications on page 51.
Using PROVU Serial Adapters
PROVU expansion modules and serial adapters are not recommended for use with the ProtEX-MAX. It is
recommended that any serial protocol conversion required on the RS-485 communications connection be
performed using a PDA7485 RS-232 to RS-485 or PDA8485 USB to RS-485 serial converter located in a
safe area.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
C NONO NC NC C
RELAY4 RELAY3
4 36 5 2 1
C NONO NC NC C
RELAY2 RELAY1
4 36 5 2 1
C
R
C
R
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.
Relay Connections
Relay connections are made to two six-terminal connectors labeled RELAY1 – RELAY4 on Figure 3.
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.
Figure 14. Relay Connections
Switching Inductive Loads
The use of suppressors (snubbers) is strongly recommended when switching inductive loads to prevent
disrupting the microprocessor’s operation. The suppressors also prolong the life of the relay contacts.
Suppression can be obtained with resistor-capacitor (RC) networks assembled by the user or purchased
as complete assemblies. Refer to the following circuits for RC network assembly and installation:
Figure 15. 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.
Figure 16. Low Voltage DC Loads Protection
RC Networks Available from Precision Digital
RC networks are available from Precision Digital and should be applied to each relay contact switching an
inductive load. Part number: PDX6901.
Note: Relays are de-rated to 1/14th HP (50 watts) with an inductive load.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
12-35 VDC
Power
Supply
+
4-20 mA
Input Meter
-
+
RI- I+
13 2
RELAY1
3 2 1
24 V
-
4-20 mA Input
Remote Display,
Chart Recorder, Etc.
-
+
RI- I+
MA OUT
13 2
RELAY1
3 2 1
24 V
MA OUT
EX+
F4
SG+
SG-
INPUT SIGNAL
COM
EX-
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 17. 4-20 mA Output Connections
Analog Output Power Supply
If the analog output is not using the 24 VDC supply to power the output loop, it can be used for other
things. The I+ Terminal is the +24 V and the R terminal is the return.
F4 Digital Input Connections
A digital input, F4, is standard on the meter. This digital input is connected with a normally open contact
across F4 and COM, or with an active low signal applied to the F4.
The functionality of the F4 input is set up in the Advanced Features, User menu.
Figure 18. F4 Digital Input 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 trigger the interlock relay. This
feature is enabled by configuring the relay, and relative digital input(s) (see page 46). In one example, dry
interlock contacts are connected in series to one digital input which will be used to force on (energize) the
assigned interlock power relay when all interlock contacts are closed (safe). The interlock relay front
panel LED flashes when locked out. The interlock relay would be wired in-series with the load (N/O
contact). See below.
Figure 19. Interlock Connections
22
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
NOTICE
The onboard digital inputs (1-4) are configured at the factory to function
identically to the front panel pushbuttons (Menu, F1, F2, & F3) in order to
work with the SafeTouch buttons. Changing the programming of the digital
inputs will affect the function of the SafeTouch buttons.
If you wish to change the behavior of the digital inputs, re-assign F1-F3 to
the desired function, then change the corresponding digital input to match.
WARNING
Observe all safety regulations. Electrical wiring should be performed in
accordance with all agency requirements and applicable national, state,
and local codes to prevent damage to the meter and ensure personnel
safety.
Digital
Input
Connection
Factory Default
Function
I1
MENU
I2
RIGHT arrow
I3
UP arrow
I4
ENTER arrow
NOTICE
The digital inputs are configured at the factory to function
identically to the front panel pushbuttons in order to work with
the SafeTouch buttons. Changing the programming of the
digital inputs will affect the function of the SafeTouch buttons.
1 2 3 4 5 6
+5 I1 I2 I3 I4 O1
7 8
O2 O3
9 10
O4 G
DI 1-4 DO 1-4
5 VDC GND
!
!
Digital I/O Connections
The ProtEX-MAX has a 10 position terminal block for connecting digital inputs and outputs.
Figure 20: Digital I/O Connections
External Switch Contacts
The ProtEX-MAX includes 4 digital inputs. These digital inputs are preconfigured at the factory to function
as external contacts to duplicate the front button functions of the instrument. The factory configuration
uses the following corresponding digital input terminals for external switch contacts.
See Digital Inputs & Outputs in the Specification on page 8 for details on the digital inputs.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
The meter is factory calibrated prior to shipment
to read in millivolts. The calibration equipment is
traceable to NIST standards.
WARNING
Take caution when cleaning the window glass as it may result in
unintentional SafeTouch button events. Only clean the ProtEX-MAX
when the system is safely shut down and inspect the ProtEX-MAX
for proper configuration prior to system restart.
Setup and Programming
Overview
There are no jumpers to set for the meter input selection.
Setup and programming may be done through the infrared through-glass SafeTouch buttons or using the
mechanical buttons when uncovered. There is a slide switch located on the connector board. This is used
to enable or disable SafeTouch Buttons.
After power and input signal connections have been completed and verified, apply power to the meter.
SafeTouch® Buttons
The ProtEX-MAX is equipped with four sensors that operate as through-glass buttons so that it can be
programmed and operated without removing the cover (and exposing the electronics) in a hazardous
area.
These buttons can be disabled for security by selecting DISABLE on the switch labeled NO-CONTACT
BUTTONS located on the connector board.
To actuate a button, press one finger to the glass directly over the marked button area. Then retract finger
more than three inches from the glass before pressing the next button. When the cover is removed, the
four mechanical buttons located next to the sensors are used. The sensors are disabled when a
mechanical button is pressed and will automatically be re-enabled after 60 seconds of inactivity.
The SafeTouch Buttons are designed to filter normal levels of ambient interference and to protect against
false triggering, however, it is recommended that the SafeTouch Buttons be disabled (slide switch to
LOCK) if there is an infrared interference source in line-of-sight to the display.
The SafeTouch Buttons are configured by default to duplicate the function of the front panel mechanical
pushbuttons associated with the integrated meter. The symbols by each SafeTouch button correspond to
a mechanical button as shown in the table on the next page.
SafeTouch Button Tips:
• To the extent possible, install the display facing away from sunlight, windows, reflective objects and
any sources of infrared interference.
• Keep the glass window clean.
• Tighten the cover securely.
• Use a password to prevent tampering.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Button Symbol
Description
LED
Status
Menu
1-8
Alarm 1-8 indicator
Right arrow/F1
Zero Meter
1-8
M
Flashing: Relay in
manual control mode
Up arrow/F2
Reset Tare
T G Flashing: Tare (Net)
Gross
Enter/F3
Tare
1-4
Flashing: Relay
interlock switch open
Note:
F4 is a digital input
Note:
LEDs for relays in manual
mode flash with the “M” LED
every 10 seconds.
Front Buttons and Status LED Indicators
• 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 or decimal point programming.
• Press or hold the Up arrow button to scroll through the menus, decimal point, or to increment the
value of a digit.
• Press the Enter button to access a menu or to accept a setting.
• Press and hold the Menu button for three seconds to access the advanced features of the meter.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Note: If you decide to update your MeterView Pro 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.
Warning!
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 onscreen
notification once the process is complete.
MeterView® Pro Software
The meter can also be programmed using the PC-based MeterView Pro software included with the meter.
This software can be installed on any Microsoft® Windows® (XP/Vista/7/8/10) computer by connecting
the meter’s onboard USB. The meter is powered by the USB connection, so there is no need to wire
anything prior to programming the meter, though USB is intended only for meter configuration.
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.
Only one meter may be connected at a time. Attaching multiple
meters will cause a conflict with the meter software.
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 doubleclick 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 onscreen 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.
Data logging for one meter at a time is available with MeterView Pro software. More advanced data
acquisition may be accomplished by using any Modbus RTU compliant software. Additional information
regarding configuration and monitoring of the meter using MeterView Pro software is available online.
Go to www.predig.com/meterview-pro.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Display
Parameter
Action/Setting
Description
setup
Setup
Enter Setup menu
Input
Input
Enter Input selection
menu
Polar
Polar
Enter unipolar or
bipolar selection menu
uni
Unipolar
Press Enter to select
operation with positive
signals only (e.g. 0-30
mV)
bi
Bipolar
Press Enter to select
operation with positive
& negative signals
(e.g. ±15 mV)
range
Range
Enter range selection
menu
15 mv
15 mV
Set meter for 15 mV
input (uni/bi)
25 mv
25 mV
Set meter for ±25 mV
input (bi)
30 mv
30 mV
Set meter for 30 mV
input (uni)
150mv
150 mV
Set meter for 150 mV
input (uni/bi)
250mv
250 mV
Set meter for ±250 mV
input (bi)
300mv
300 mV
Set meter for 300 mV
input (uni)
ratio
Ratiometric
Press Enter to select
ratiometric operation to
compensate for
excitation changes.
d-SCAL
Dual-Scale
Press Enter to select
dual-scale display
(Select Yes or No)
units
Units
Select the display
units/tags
Dec pt
Decimal
point
Set decimal point
Pv 1
PV1
PV1 decimal point
(dual-scale)
Pv 2
PV2
PV2 decimal point
(dual-scale)
prog
Program
Enter the Program
menu
SCALE
Scale
Enter the Scale menu
Display
Parameter
Action/Setting
Description
SCAL 1
Scale 1
Enter the Scale menu
for PV1
SCAL 2
Scale 2
Enter the Scale menu
for PV2
Cal
Calibrate
Enter the Calibration
menu
Inp 1
Input 1
Calibrate input 1 signal
or program input 1
value
Dis 1
Display 1
Program display 1
value
Inp 2
Input 2
Calibrate input 2 signal
or program input 2
value (up to 32 points)
Dis 2
Display 2
Program display 2
value (up to 32 points)
Error
Error
Error, calibration not
successful, check
signal or programmed
value
dsplay
Display
Enter the Display
menu
Line 1
Line 1
Press Enter to assign
the upper display
parameter (default:
PV)
Line 2
Line 2
Press Enter to assign
the lower display
parameter (default:
engineering units)
d-Inty
Display
intensity
Set display intensity
level from 1 to 8
RELaY
Relay
Enter the Relay menu
RLY 1
Relay 1
Relay 1 setup
Act 1
Action 1
Set relay 1 action
Auto
Automatic
Set relay for automatic
reset
A-nman
Automanual
Set relay for automatic
& manual reset any
time
LatCH
Latching
Set relay for latching
operation
Display Functions & Messages
The meter displays various functions and messages during setup, programming, and operation. The
following table shows the main menu functions and messages in the order they appear in the menu.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Display
Parameter
Action/Setting
Description
Lt-cLr
Latchingcleared
Set relay for latching
operation with manual
reset only after alarm
condition has cleared
Altern
Alternate
Set relay for
alternation control
Sanmpl
Sampling
Set relay for sampling
operation
OFF
Off
Disable relay and front
panel status LED
(Select Off to enable
Interlock feature)
Set 1
Set 1
Program set point 1
RSt 1
Reset 1
Program reset point 1
RLY 2
Relay 2
Relays 2-4 setup
FaiLSF
Fail-safe
Enter Fail-safe menu
FLS 1
Fail-safe 1
Set relay 1 fail-safe
operation
on
On
Enable fail-safe
operation
FLS 2
Fail-safe 2
Set relays 2-4 fail-safe
operation
DeLAY
Delay
Enter relay Time Delay
menu
DLY 1
Delay 1
Enter relay 1 time
delay setup
On 1
On 1
Set relay 1 On time
delay
OFF 1
Off 1
Set relay 1 Off time
delay
DLY 2
Delay 2
Enter relays 2-4 time
delay setup
Aout
Analog
output
Enter the Analog
output scaling menu
Dis 1
Display 1
Program display 1
value
Out 1
Output 1
Program output 1
value (e.g. 4.000 mA)
Dis 2
Display 2
Program display 2
value
Display
Parameter
Action/Setting
Description
Out 2
Output 2
Program output 2
value (e.g. 20.000 mA)
reset
Reset
Press Enter to access
the Reset menu
Rst Hi
Reset high
Press Enter to reset
max display
Rst Lo
Reset low
Press Enter to reset
min display
Rst HL
Reset
high & low
Press Enter to reset
max & min displays
Rst tr
Reset tare
Press Enter to reset
tare
tare
Tare
Enter Tare menu
Captur
Capture
Press Enter to set
meter to capture tare
using the Tare button
Prog T
Programma
ble
Press Enter to set
meter to
programmable tare
and enter a value
Off
Off
Press Enter to disable
the tare function
Contrl
Control
Enter Control menu
Auto
Automatic
Press Enter to set meter
for automatic operation
mAn
Manual
Press Enter to manually
control relays or analog
output operation
pass
Password
Enter the Password
menu
Pass 1
Password 1
Set or enter Password 1
Pass 2
Password 2
Set or enter Password 2
Pass 3
Password 3
Set or enter Password 3
unloc
Unlocked
Program password to
lock meter
locd
Locked
Enter password to
unlock meter
999999
-99999
Flashing
Over/under range
condition
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
0 0 4.000
00 4 .000
00 5 .000
dis 1
dis 1
dis 1
Next
Setting
Select
Next
Digit
Increment
Digital
V
alue
Accept
Setting
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 arrow to auto-increment the display value.
Press the Enter button, at any time, to accept a setting or Menu button to exit without saving changes.
Main Menu
The main menu consists of the most commonly used functions: Setup, Reset, Tare, Control, 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.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Setting Up the Meter (setup)
The Setup menu is used to select:
1. Unipolar (e.g. 0-30 mV) or bipolar (e.g. ±25 mV) polarity, input range, ratiometric operation, and
dual-scale feature
2. Engineering units
3. Decimal point position
4. Program scaling or live calibration
5. Display parameter and intensity
6. Relay operation
7. 4-20 mA analog output scaling
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
If Polarity (
polar
)
Set to Bi (
bi
)
Setting the Input Signal (Input)
Enter the Input menu to set up the input polarity, range, ratiometric operation, and dual-scale feature.
The meter is capable of accepting any signal from -250 to 250 mV in bipolar mode or up to 300 mV in
unipolar mode.
After selecting “Yes” or “No” for ratio, d-SCAL is displayed. Selecting “Yes” enables the dual-scale
feature, allowing scaling of the same input in two different scales (for PV1 & PV2) or displaying the
percentage of PV1.
Input Polarity Selection (PoLAR)
Select unipolar operation for inputs in ranges from 0 to 300 mV and select bipolar operation for inputs in
ranges from -250 mV to +250 mV. This setting determines the selectable ranges for the millivolt input
Range Selection (RANGE)
This menu is used to select the input range. The selections listed are determined by the Polarity setting.
Unipolar mode: 0-15, 0-30, 0-150, 0-300 mV
Bipolar mode: ±15, ±25, ±150, ±250 mV
Ratiometric Operation (ratio)
Ratiometric operation corrects the measured strain gauge signal for up to ±5% variation of either the
internal or external excitation power supply. In order to use the ratiometric operation, the ratiometric
operation menu must be set to yes (YES).
Dual-Scale (d-sCal)
The analog input can be displayed in two different scales, by enabling the dual-scale feature in the SetupInput menu, see page 31.
To enable the dual-scale feature you must select d-SCAL in the Input selection menu.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Setting the Input Units (units)
Enter the pre-defined engineering unit or custom unit. The pre-defined units have automatic conversion
factors. This unit will be displayed if d unit is selected as the lower display parameter. See the flow
chart on page 36 to access the display menu to show the unit on the lower display.
The custom unit may also be used to enter a display tag.
Pre-defined engineering units: lb, kg, ounce, gram, ton (short), tonne (metric ton). The meter converts
the reading according to the unit selected (e.g. 100.00 lb = 45.36 kg = 45359.2 g = 1600 oz).
Unit Conversions: After scaling values in the Scale menu have been entered during setup, automatic
unit conversions are done when switching from any standard unit to any other standard unit during future
changes of the Units menu.
Once a standard unit has been selected in the units menu, the user must then set their scaling values for
that unit (under the setup menu) in order for that unit's conversion factor to take effect. Otherwise, the
meter will allow the user to freely switch between standard unit selections, without applying a conversion
factor.
Note that if the dual-scale feature is selected in the Setup menu, both PV1 and PV2 will be converted
from the original standard unit to the new standard unit. A scaled PV not scaled for the selected units
must be reprogrammed. Example: If PV 1 is scaled for pounds, and PV 2 scaled for gallons; if the Units
selection is changed from Lb to ounce, PV 2 will need to re-scaled manually back to gallons.
Note: PV1 and PV2 may use different standard units as starting points, however the user must select the
unit and complete scaling for both PV1 and PV2 individually. For example, set PV1 equal to "Lbs" and
complete the scaling for PV1 only. PV1 is now reading in Lbs. Then, change the units for PV2 to be "Kg"
and complete the scaling for PV2. PV2 will read in kilograms and PV1 will reflect the conversion from Lbs
to Kgs.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Display
Character
Display
Character
Display
Character
Display
Character
0
0
C
C
k
K
v V 1
1
c
c
l
L
uw
w
2
2
d
d
n m
m
x X 3
3
e
E
n
n
y Y 4
4
f
F
O
O
z Z 5
5
g
G
o
o
- - 6
6
9
g
p
P
/ / 7
7
H
H
q
q
[ ] 8
8
h
h
r
r
] [ 9
9
I
I
s
S
=
=
A
A
I
i
t
t
!
Degree(<)
b
b
j
J
u
u
Space
Setting the Input Units or Custom Tags (units)
Enter the input unit or custom tag that will be displayed if units are selected in the units menu, or d
unit is selected as the lower display parameter. See the flow chart on page 36 to access the display
menu to show the unit or tag on the lower display. The engineering units or custom legends can be set
using the following 7-segment character set:
Notes: Degree symbol represented by (<) if programming with MeterView® Pro. 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.
Setting the Decimal Point (dEc pt)
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.
Pressing the Up arrow moves the decimal point to the left.
If the dual-scale feature is selected, the decimal point selections for PV1 & PV2 are enabled.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
To scale the meter without a signal source, refer to
Scaling the Meter (SCALE), page 35.
Warm up the meter for at
least 15 minutes before
performing calibration to
ensure specified accuracy.
Programming the Meter (prog)
The Program menu contains the Scale and the Calibrate menus.
For strain gauge and load cell applications it is recommended to calibrate the meter using the sensor as
the input and with ratiometric operation enabled to compensate for small variation in the excitation
voltage.
It is very important to read the following information, before proceeding to program the meter:
• The meter is factory calibrated prior to shipment to read in millivolts. The calibration equipment is
traceable to NIST standards.
• Use the Scale menu to scale the input (e.g. 0-100 mV). A calibrated signal source is not needed to
scale the meter.
• The PD8-6100 is a single input meter with dual-scale capability.
If the dual-scale feature is selected in the Setup menu, the Scale 1 and Scale 2 menus are enabled for
PV1 & PV2 respectively.
The process inputs may be calibrated or scaled to any display value within the range of the meter.
Program Menu for Single Scale Process
Program Menu for Dual-Scale Applications
Additional parameters, not needed for most applications, are programmed in the Advanced Features
menu; see Advanced Features Menu, page 49.
Calibrating the Meter with Strain Gauge/Load Cell (Cal)
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.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Scaling the Input for PV1 (SCAL 1)
Scaling the Input for PV2 (SCAL 2)
For instructions on how to program
numeric values see
Setting Numeric Values, page 29.
Input Range
Input 1 & Input 2 Span
15 mV
0.2 mV
25 mV, 30 mV
0.4 mV
150 mV
2.0 mV
250 mV, 300 mV
4.0 mV
Multi-Point Calibration & Scaling
The meter is set up at the factory for 2-point linear calibration. The number of points for multi-point
calibration/scaling is set up in the Advanced Features menu. Up to 32 linearization points may be
selected for PV1 and up to 8 linearization points may be selected for PV2. See page 53 for details.
Scaling the Meter (SCALE)
The strain gauge input (e.g. 0-100 mV) can be scaled to display the process variable in engineering units.
A signal source is not needed to scale the meter; simply program the inputs and corresponding display
values.
Dual-Scale Application
The analog input can be displayed in two different scales, by enabling the dual-scale feature in the Setup Input menu,
see page 31.
To enable the dual-scale feature you must select it in the Input selection menu.
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.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Setting the Display Parameter & Intensity (dsplay)
Display line 1 (line 1) can be
programmed to display:
1. Process value 1 (PV1)
2. Process value 2 (PV2)
3. Percent of PV1 (PCt)
4. Relay set points
5. Toggle process value & units
6. Max & min values
7. Gross value
8. Toggle net & gross values
9. Input millivolts
10. Modbus input
Display line 2 (line 2) can be
programmed to display:
1. Engineering units or custom
legends
2. Process value 1 (PV1)
3. Process value 2 (PV2)
4. Percent of PV1 (PCt)
5. Relay set points
6. Toggle process value & units
7. Max & min values
8. Gross value
9. Toggle net & gross values
10. Input millivolts
11. Modbus input
12. Off (no display)
Display Intensity: 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 setting is 8.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Caution!
During setup, the relays do not follow the
input and they will remain in the state
found prior to entering the Relay menu.
!
Setting the Relay Operation (relay)
This menu is used to set up the operation of the relays.
1. Relay action
a. Automatic reset only (non-latching)
b. Automatic + manual reset at any time (non-latching)
c. Latching (manual reset only)
d. Latching with Clear (manual reset only after alarm condition has cleared)
e. Pump alternation control
(automatic reset only)
f. Sampling (the relay is
activated for a user-specified
time)
g. Off (relay state controlled by
Interlock feature)
2. Set point
3. Reset point
4. Fail-safe operation
a. On (enabled)
b. Off (disabled)
5. Time delay
a. On delay (0-999.9 seconds)
b. Off delay (0-999.9 seconds)
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Setting the Relay Action
Operation of the relays is programmed in the Action menu.
The relays may be set up for any of the following modes of
operation:
1. Automatic reset (non-latching)
2. Automatic + manual reset at any time (non-latching)
3. Latching (manual reset only, at any time)
4. Latching with Clear (manual reset only after alarm condition has cleared)
5. Pump alternation control (automatic reset only)
6. Sampling (the relay is activated for a user-specified time)
7. Off (relay state controlled by Interlock feature)
The following graphic shows relay 1 action setup; relay 2-4 are set up in a similar fashion.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
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.
Low Alarm Operation (Set < Reset)
For Manual reset mode, ACK can be pressed
anytime to turn "off" relay. For relay to turn back
"on", signal must go above set point, and then go
below it.
Programming Set and Reset Points
High alarm indication: program set point above reset point.
Low alarm indication: program set point below reset point.
The deadband is determined by the difference between set and
reset points. Minimum deadband is one display count. If 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 and Alarm Operation Diagrams
The following graphs illustrate the operation of the relays, status LEDs, and ACK button.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
High Alarm with Fail-Safe
Operation (Set > Reset)
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.
Pump Alternation Control Operation
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Set
Reset
Relay
LED
Input
Sample
Time
Sample
Time
Sample
Time
Relay Sampling Operation
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.
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-mAn)” reset mode is selected, the LED follows the reset point and not
the relay state when the relay is acknowledged.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Fail-Safe
Selection
Non-Alarm State
Alarm State
Power Failure
NO
NC
NO
NC
Off
Open
Closed
Closed
Open
Relays go to
non-alarm state
On
Closed
Open
Open
Closed
Relays go to
alarm state
Alarm #
HI or LO
Alarm
Set
Point
Reset
Point
Power-Up
Reading
Relay
& LED 1 HI
1000
500
499
Off 2 LO
700
900
499
On 3 LO
250
400
499
Off 4 HI
450
200
499
On
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
Relay Operation Details
Overview
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. Typical applications include high or low force, level, or pressure alarms,
control applications such as simple on/off control, and relay alternation control for up to 4 pumps. There
are four basic ways the relays can be used:
1. High or Low Alarms with Latching or Non-Latching Relays
2. Simple On/Off Control with 100% Adjustable Deadband
3. Sampling (Based on Time)
4. Alternation Control for up to 4 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:
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:
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 respond differently for latching
and non-latching 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 reflect 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).
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Warning!
In latching relay mode, latched relays will reset
(unlatch) when power is cycled.
Relay terminology for following tables
Terminology
Relay Condition
On
Alarm (Tripped)
Off
Normal (Reset)
Ack
Acknowledged
Automatic reset only
Condition
LED
Relay
Normal
Off
Off
Alarm
On
On
Ack (No effect)
On
On
Normal
Off
Off
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
Manual reset any time
Condition
LED
Relay
Normal
Off
Off
Alarm
On
On
Ack
Off
Off
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
Latching and Non-Latching Relay Operation
The relays can be set up for latching (manual reset) or
non-latching (automatic reset) operation.
The On and Off terminology does not refer to the status of
the relay’s coil, which depends on the fail-safe mode
selected.
Non-Latching Relay (Auto)
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 (A-man)
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.
The next time an alarm occurs, the operator acknowledges
the alarm manually while the alarm condition still exists.
This causes the relay to reset, but the LED stays on until
the meter returns to the normal condition.
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.
Latching Relay (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.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
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
+5 I1 I2 I3 I4 O1 O2 O3 O4 G
DO 1-4
GND
ACK
PDA1044 Digital I/O Module
1 2 3 4 5 6 7 8 9 10
DI 1-4
Acknowledging Relays
There are two ways to acknowledge relays programmed for manual reset:
1. Via the programmable front panel function keys F1-F3 (Assignable via the User menu inside the
Advanced Features menu.
2. Remotely via a normally open pushbutton wired across one of the digital inputs and the +5 V
terminals on the digital I/O modules, or using the F4 digital input (factory default setting), which is
triggered with a contact closure to COM, or with an active low signal (see page 22).
When the ACK button or the assigned digital input is closed, all relays programmed for manual reset are
acknowledged.
Note: The function key and digital input assignment is changed in the Advanced – User menu.
Figure 21. Acknowledge Relays with Digital Input
Pump Alternation Control Applications (Altern)
For pump control applications where two or more similar pumps are used to control the level of a tank, 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 4 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.
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 4 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.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Set and Reset Point Programming
Relay
Set Point
Reset Point
Function
1
495
750
Controls low alarm
2
7500
6900
Controls high alarm
3
7000
900
Controls backup pump
4
6000
1000
Controls main pump
6245
GAL
Strain Gauge Signal Load Cell
6245
GAL
Strain Gauge Signal Load Cell
7153
GAL
Strain Gauge Signal Load Cell
7782
GAL
Strain Gauge Signal Load Cell
495
GAL
Strain Gauge Signal Load Cell
Application #2: Pump Alternation Using Relays 3 & 4
1. Relays 1 and 2 are set up for low and high alarm indication.
2. Relays 3 and 4 are set up for pump alternation.
The following graphics provide a visual representation of a typical pump alternation application with high
and low alarm monitoring.
1. Relay #4 turns the main pump on at 6000
gallons and turns it off at 1000 gallons.
2. With the Pump Alternation feature activated,
the next time the level reaches 6000 gallons,
relay #3 transfers and starts the backup
pump.
3. If the backup pump is not able to keep up,
and the level reaches 7000 gallons, relay #4
transfers and starts the main pump as well.
4. Relay #2 trips the High Level Alarm at 7500
gallons and resets at 6900 gallons.
5. Relay #1 trips the Low Level Alarm at 495
gallons and resets at 750 gallons.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
1 2 3 4 5 6
+5 I1 I2 I3 I4 O1
7 8
O2 O3
9 10
O4 G
DI 1-4 DO 1-4
5 VDC GND
SW2
SW1
For instructions on how to program
numeric values see
Setting Numeric Values, page 29.
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 off) 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 restart only after the interlock relay is re-activated by the digital inputs (switches).
Scaling the 4-20 mA Analog Output (Aout)
The 4-20 mA analog output can be scaled to provide a 4-20 mA signal for any display range selected.
No equipment is needed to scale the analog output; simply program the display values to the
corresponding mA output signal.
The Analog Output menu is used to program the 4-20 mA output based on display values.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
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.
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.
Setting Up the Password (pass)
The Password menu is used for programming three levels of security to prevent unauthorized changes to
the programmed parameter settings.
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 29.
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.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Once Manua l mode is initia ted on any relay or
analog outpu t, an LED labeled “M” is turned
on. Every few second s, a ll LEDs re presenting
outputs that a re in Manual mode , as well as
the “M” LED flash. This pro ce ss will continue
as long as any output is in manual mode.
0.0
lbs
0.2
lbs
0.2
lbs
Before tare
After capture tare
After reset tare
Reset Menu (reset)
The Reset menu is used to reset the tare (rst tr) and the maximum or minimum readings (peak or
valley) reached by the process; max & min may be reset at the same time by selecting “reset high & low”
(rst HL).
Note: Resetting the tare resets the max & min readings.
Tare Menu (Tare)
The Tare menu is used to select the tare mode. There are three modes of operation: Capture Tare,
Programmable Tare, and Off.
Capture Tare: Pressing the Tare key zeroes the display and the “T” indicator flashes indicating that tare
is applied to the reading (e.g. Net weight).
Programmable Tare: Program a known value to be subtracted from the display value to obtain the net
value. Pressing Reset tare clears the tare value to zero. Programmable Tare will not tare negative PVs.
Use Capture Tare for negative PVs.
Off: Tare function is disabled and pressing Tare key has no effect.
Tare Functionality (tare)
The tare function zeroes out the display. In the case of scale weight, tare is used to eliminate container
weight and provide net weight readings.
Control Menu (Contrl)
The 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.
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Display
Parameter
Action/Setting
filtEr
Filter
Set noise filter value
bypASs
Bypass
Set filter bypass value
Round
Rounding
Select rounding value
seriAl
Serial
Set serial communication
parameters
SlaveId
Slave ID
Set slave ID or meter
address
baud
Baud rate
Select baud rate
Tr dLY
Transmit
delay
Set transmit delay for serial
communication
Parity
Parity
Select parity
Even, Odd, or None with 1
or 2 stop bits
t-byt
Time byte
Set byte-to-byte timeout
SelEct
Select
Enter the Select menu
(function, cutoff, out)
Functn
Signal input
conditioning
Linear, select number of
points
Linear
Linear
Set meter for linear function
and select number of
linearization points
Pv 1
PV1
Select PV1 number of
linearization points
Pv 2
PV2
Select PV2 number of
linearization points
No PtS
Number of
points
Set PV1 for 2 to 32-point
linearization
Set PV2 for 2 to 8-point
linearization
Display
Parameter
Action/Setting
SCALE
Scale
Scaling parameter
SCAL 1
Scale 1
Scaling parameter 1
SCAL 2
Scale 2
Scaling parameter 2
CutofF
Cutoff
Set low cutoff
Auto 0
Auto Zero
Enter the Auto Zero function
(on/off)
AoutPr
Analog
output
programmin
g
Program analog output
parameters
Source
Source
Select source for the 4-20
mA output
O-rang
Overrange
Program mA output for
display overrange
u-rang
Underrange
Program mA output for
display underrange
mAx
Maximum
Program maximum mA
output allowed
nmin
Minimum
Program minimum mA
output allowed
Calib
Calibrate
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
Advanced Features Menu
To simplify the setup process, functions not needed for most applications are located in the Advanced
Features menu.
Press and hold the Menu button for three seconds to access the advanced features of the meter.
Advanced Features Menu & Display Messages
The following table shows the functions and messages of the Advanced Features menu in the order they
appear in the menu.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Display
Parameter
Action/Setting
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 – 4
dO 1
Digital
output 1
Assign digital output 1 – 4
ICal
Internal
source
calibration
Enter internal source
calibration (used for scaling
the meter without a signal
source)
15nmv
15 mV
calibration
Calibrate 15 mV input range
(internal reference source
used for scaling the input)
20nmv
20 mV
calibration
Calibrate 30 mV input range
(internal reference source
used for scaling the input)
Display
Parameter
Action/Setting
100nmv
100 mV
calibration
Calibrate 150 mV input
range (internal reference
source used for scaling the
input)
200nmv
200 mV
calibration
Calibrate 300 mV input
range (internal reference
source used for scaling the
input)
stroff
Strain offset
Calibrate the offset of the
input circuit
v Lo
mV low
Calibrate low mV input (e.g.
0 mV)
v Hi
mV high
Calibrate high mV input (e.g.
100 mV)
Diag
Diagnostics
Display parameter settings
LED t
LED test
Test all LEDs
Info
Information
Display software and S/N
information
Erase
Erase
Erase MeterView Pro
software stored in meter’s
memory
Rounding
Selection
Actual
Value
Display
Value
Actual
Value
Display
Value
1
12.022
12.022
12.023
12.023
5
12.022
12.020
12.023
12.025
10
12.024
12.020
12.025
12.030
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
99.9% of full scale.
Rounding Feature (round)
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. This
setting affects the last two digits, regardless of decimal point position. See examples below:
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Warning!
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.
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 5 for details.
Note: More detailed instructions are provided with each optional serial communications adapter.
Note: Refer to the ProVu® Modbus Register Tables located at www.predig.com for details.
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.
Serial Communications Overview
RS-232 and RS-485 are standard interfaces approved by the Electronic Industries Alliance (EIA) for
connecting serial devices. In EIA terms, the device (e.g. meter) that connects to the interface is called a
Data Communications Equipment (DCE) and the device to which it connects (e.g. the computer) is called
a Data Terminal Equipment (DTE).
RS-485 can support multi-point connections per line because it uses lower-impedance drivers and
receivers.
Line drivers and receivers are used to exchange data between two or more points (nodes) on a serial
communications network. Reliable data communications can be difficult in the presence of induced noise,
ground level differences, and other hazards associated with installation of a network. When
communicating at high data rates, or over long distances in real world environments, RS-232 is often
inadequate. The differential data transmission of RS-485 offers superior performance in most
applications. Differential signals can help nullify the effects of ground shifts and induced noise signals that
can appear as common mode voltages on a network.
A multi-point network consists of multiple drivers and receivers connected on a single bus, where any
point (node) can transmit and/or receive data. RS-485 allows multiple drivers and receivers on the same
two-wire or four-wire system. The RS-485 standard specifies up to 32 drivers and 32 receivers on a single
bus, but with the introduction of "automatic" repeaters and high-impedance drivers/receivers, this number
can be extended to hundreds of points (nodes) on a network.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
PDA8485
DO
DO
DI
DI
GND
DO
DO
DI
DI
GND
RS-485 DEVICE
PDA8485
DATA
DATADO
DO
DI
DI
GND GND
RS-485 DEVICE
The cabling used for an RS-485 serial communications network should always be a high quality cable
such as Belden 8162 or Alpha 6203C. A two-wire system requires two twisted pairs, and a four-wire
system requires three twisted pairs (the extra twisted pair is needed for the signal ground).
Figure 22 illustrates how to connect a general four-wire network (a four-wire network actually contains 5
wires).
Figure 22: General Four-Wire Network Connection
Figure 23 illustrates how to connect a general two-wire network (a two-wire network actually contains 3
wires). Note that the PDA7485 and PDA8485 have DIP switches that allow for two-wire connections
without the need to externally wire the DO to the DI and the /DO to the /DI (see the converter section for
complete details).
Figure 23: General Two-Wire Network Connection
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Select Menu (SElect)
The Select menu is used to select the signal input conditioner applied to the input (linear), low cutoff,
Auto-zero, and analog output programming.
The multi-point linearization is part of the linear function selection.
Signal Input Conditioning (Functn)
The Function menu is used to select the signal input conditioner applied to the input: linear. The multipoint 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.
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 PV under the linear function. The multi-point linearization can be used to linearize the
display for non-linear signals such as those from level Sensors used to measure volume in odd-shaped
tanks or to convert level to flow using weirs and flumes with complex exponent.
If the dual-scale Level feature has been selected, the menus for PV1 & PV2 are enabled. PV2 can be
programmed with up to 8 linearization points.
Auto-Zero (Auto 0)
Auto-zero corrects for drift that can occur over time that causes the input signal to slowly change. The
meter will continue to read zero despite slow and small changes to the input signal. The auto-zero value
represents the percent of full scale drift that the meter will correct.
Under normal circumstances, when the signal increases quickly, by an amount greater than the auto-zero
percent of full scale, the value will not be adjusted for. Slow signal changes that occur over time at
increments less than the auto-zero value, will not register on the meter (example: dust on a load cell or
sensor drift over time).
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*If installed
Low Cutoff (CutofF)
The low cutoff feature allows the meter to be programmed so that the often-unsteady output from a
differential pressure Sensor, at low 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 (e.g. PV)
2. Overrange: Analog output value with display in overrange condition
3. Underrange: Analog output value with display in underrange condition
4. Max: Maximum analog output value allowed regardless of input
5. Min: Minimum analog output value allowed regardless of input
6. Calibrate: Calibrate the internal 4-20 mA source reference used to scale the 4-20 mA output
Analog Output Source
The source for generating the 4-20 mA output may be assigned to the process variable, maximum or
minimum value reached by the process, one of the set points, or the Modbus PV 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.
Programmable Function Keys User Menu (user)
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 signal input 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.
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Display
Description
Rst Hi
Reset the stored maximum display
value
Rst Lo
Reset the stored minimum display
value
Rst HL
Reset the stored maximum &
minimum display values
tare
Capture tare and zero the display
Rst tr
Reset captured tare and resume
normal operation
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 as they
are until a button assigned to
enable relays (Rly E) is pressed
d Hold
Hold the current display value
momentarily while the function key
or digital input is active. The
process value will continue to be
calculated in the background.
Ln1 Hi
Display maximum display value on
line 1
Ln1 Lo
Display minimum display value on
line 1
Ln1 HL
Display maximum & minimum
display values on line 1
Ln2nmV
Display the mV input on line 2
Display
Description
Ln2 Hi
Display maximum display value on
line 2
Ln2 Lo
Display minimum display value on
line 2
Ln2 HL
Display maximum & minimum
display values on line 2
zero
Zero the display (this is different
from capture tare because it cannot
be reset)
F On 1*
Force relay 1 (*through 4) into the
on state. This function is used in
conjunction with a digital input to
achieve interlock functionality. See
page 46 for details about interlock
relays.
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)
Function Keys & Digital I/O Available Settings
Refer to the following table for descriptions of each available function key or digital I/O setting.
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The meter is factory calibrated prior to shipment to read in millivolts. The
calibration equipment is traceable to NIST standards. There is no need to
perform an internal calibration for new meter.
Notes:
1. mV input: If meter is in operation and it is intended to accept only one input range
(e.g. 0-30 mV), recalibration of other ranges is not necessary.
2. Strain gauge: If the meter is intended to accept a strain gauge bridge input, it is
recommended to use the CAL function with ratiometric compensation turned on.
3. Allow the meter to warm up for at least 15 minutes before performing the internal
source calibration procedure.
Internal Source Calibration (ICAL)
The internal source allows the user to scale the meter without applying a signal.
The use of calibrated signal sources is necessary to perform the internal source calibration of the meter.
Check calibration of the meter at least every 12 months. Each range must be recalibrated separately.
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. The meter displays the first input range (15 mv), press the Up arrow to select any other range (e.g.
100mv. Press Enter to start the calibration process.
Example of Internal Calibration for 100 mV input range:
4. The meter displays the message “stroff” (strain offset), short the SG+, SG- terminals and press
Enter. The low input message is displayed (v lo). Apply the low input signal (e.g. 0.00 mV) and press
Enter. The display flashes for a moment while the meter is accepting the low input signal.
5. After the display stops flashing, a number is displayed with the leftmost digit brighter than the rest.
The bright digit is the active digit that can be changed by pressing the Up arrow button. Press the
Right arrow button to move to the next digit.
6. Set the display value to correspond to the input signal being calibrated; typically 0.00 mV.
7. The display moves to the high input calibration (v Hi). Apply the high input signal and press Enter.
8. Set the display for the high input calibration, in the same way as it was set for the low input
calibration, typically 100.00 mV.
The graphic above shows the calibration of the 100 mV input range. The other input ranges are 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.
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Input Range
Input 1 & Input 2 Span
15 mV
0.2 mV
25 mV, 30 mV
0.4 mV
150 mV
2.0 mV
250 mV, 300 mV
4.0 mV
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.
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.
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Button
Description
Press to enter or exit Programming
Mode.
Press to zero the meter or other
parameter/ function assigned through
the User menu.
Press to reset tare or other
parameter/function assigned through
the User menu.
Press to tare the display value or other
parameters/function assigned through
the User menu.
Meter Operation
The meter is capable of accepting any signal from -250 to 250 mV in bipolar mode, or 0 to 300 mV in
unipolar mode, and displaying these signals in engineering units from -99999 to 999999 (e.g. a 0-100 mV
signal could be displayed as 0 to 50000). The dual-line display can be customized by the user to operate
in such a way as to satisfy a specific application. Typically, display line 1 is used for the process variable;
while line 2 is used for engineering units, custom legend, or set point indication.
The input signal can be scaled to display the process in two different scales; for example, line 1 could
indicate weight in pounds and line 2 could indicate percent of maximum weight capacity. The meter can
also be set up to display the analog input on line 1 and the Modbus input on line 2. The relays and analog
output can be programmed to operate from the Modbus PV input if the Modbus input has been assigned to
display line 1.
During operation, the meter can be either tared or zeroed. The tare feature is useful for momentarily zeroing
out of the display, in the case where there is additional weight than what is intended to be measured (e.g.
a bucket on the scale is being filled with material). The meter will display a T to indicate that the display has
been tared and taring is resettable via the reset tare operation. The zero feature is useful for permanent
zeroing of the meter, in the case where there has been drift in the strain gauge output over time. The zero
feature will zero out the display without indication or the ability to reset.
Front Buttons Operation
SafeTouch® Buttons
The ProtEX-MAX is equipped with four sensors that operate as through-glass buttons so that it can be
programmed and operated without removing the cover (and exposing the electronics) in a hazardous
area.
These buttons can be disabled for security by selecting DISABLE on the switch labeled NO-CONTACT
BUTTONS located on the connector board.
To actuate a button, press one finger to the glass directly over the marked button area. Then retract finger
more than three inches from the glass before pressing the next button. When the cover is removed, the
four mechanical buttons located next to the sensors are used. The sensors are disabled when a
mechanical button is pressed and will automatically be re-enabled after 60 seconds of inactivity.
The SafeTouch Buttons are designed to filter normal levels of ambient interference and to protect against
false triggering, however, it is recommended that the SafeTouch Buttons be disabled (slide switch to
LOCK) if there is an infrared interference source in line-of-sight to the display.
The SafeTouch Buttons are configured by default to duplicate the function of the front panel mechanical
pushbuttons associated with the integrated meter. The symbols by each SafeTouch button correspond to
a mechanical button as shown in the above table.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
WARNING
Take caution when cleaning the window
glass as it may result in unintentional
SafeTouch button events. Only clean the
ProtEX-MAX when the system is safely shut
down, and inspect the ProtEX-MAX for
proper configuration prior to system restart.
SafeTouch Button Tips:
• To the extent possible, install the
display facing away from sunlight,
windows, reflective objects and any
sources of infrared interference.
• Keep the glass window clean.
• Tighten the cover securely.
• Use a password to prevent tampering.
Function Keys Operation
During operation, the programmable function keys operate according to the way they have been
programmed in the Advanced Features – User menu.
The table above shows the factory default settings for F1, F2, and F3.
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. Any of
the F1-F3 function keys (buttons) and the digital inputs can be programmed to reset the max & min
readings.
2. Display continuously by assigning either display to max/min through the Display menu.
To display max reading using function key:
1. Press user assigned function key/digital input to display maximum reading since the last reset/powerup.
2. To reset max/min, press the Menu button, then the Up arrow/F2 button until the Reset (Reset) menu
is displayed.
3. Press the Up arrow/F2 button to select reset high (rst Hi), reset low (rst Lo), or reset high and low
(rst HL) is displayed and then press the Enter/F3 button. The max and/or min displays are reset to
actual values.
4. Press Menu to exit max/min display reading.
To display max/min readings continuously:
Assign either display to Max (d Hi), Min (d Lo), or toggle between Max and Min (d HL) every 10
seconds.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Troubleshooting
Due to the many features and functions of the meter, it’s possible that the setup of the meter does not
agree with what an operator expects to see. If the meter is not working as expected, refer to the
Diagnostics menu and consult the recommendations described below.
Diagnostics Menu (diag)
The Diagnostics menu is located in the Advanced Features menu, to access Diagnostics menu see
Advanced Features Menu, page 49.
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
49.
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 49.
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 the Diagnostics menu.
4. The meter goes through an initialization sequence (similar as on power-up), and loads the factory
default settings.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Parameter
Display
Default Setting
Input type
Polar
Polar = Uni
Input Range
range
Range = 30mV
Ratiometic
ratio
Ratio = Yes
Dual-scale
d-SCAl
No (Single scale)
Filter
filter
70
Bypass
bypass
0.2
Rounding
round
1
Function
Functn
Linear
Number of points
No Pts
2
Programming
prog
Scale
Input 1
InP 1
0.00 mV
Display 1
Dis 1
0.00
Input 2
InP 2
100.00 mV
Display 2
Dis 2
100.00
Decimal point
ddd.ddd
3 places
Cutoff value
CutofF
0.000 (disabled)
Auto-zero
Auto 0
0.05% of Full
Scale
Display
assignment
Dsplay
Line 1
Line 1
PV: Process
variable
Line 2
Line 2
Eng units: mV
Display intensity
d-Inty
8
Relay 1 action
Act 1
Automatic
Relay 1 set point
Set 1
10.00
Relay 1 reset
point
RSt 1
5.00
Relay 2 action
Act 2
Automatic
Relay 2 set point
Set 2
20.00
Relay 2 reset
point
RSt 2
15.00
Relay 3 action
Act 3
Automatic
Relay 3 set point
Set 3
30.00
Relay 3 reset
point
RSt 3
25.00
Relay 4 action
Act 4
Automatic
Relay 4 set point
Set 4
40.00
Relay 4 reset
point
RSt 4
35.00
Parameter
Display
Default Setting
Fail-safe relay 1
Fls 1
Off
Fail-safe relay 2
Fls 2
Off
Fail-safe relay 3
Fls 3
Off
Fail-safe relay 4
Fls 4
Off
On delay relay 1
On 1
0.0 sec
Off delay relay 1
Off 1
0.0 sec
On delay relay 2
On 2
0.0 sec
Off delay relay 2
Off 2
0.0 sec
On delay relay 3
On 3
0.0 sec
Off delay relay 3
Off 3
0.0 sec
On delay relay 4
On 4
0.0 sec
Off delay relay 4
Off 4
0.0 sec
Display 1 analog
out
Dis 1
0.00
Output 1 value
Out 1
4.000 mA
Display 2 analog
out
Dis 2
100.00
Output 2 value
Out 2
20.000 mA
Source analog
output
Source
Process Variable
Overrange output
O-rang
21.000 mA
Underrange
output
u-rang
3.000 mA
Maximum output
mAx
23.000 mA
Minimum output
min
1.000 mA
Slave ID
(Address)
SlavId
247
Baud rate
baud
9600
Transmit delay
Tr dly
10 ms
Parity
Parity
Even
Byte-to-byte
timeout
t-byt
010 (0.1 sec)
F1 function key
F1
Zero
F2 function key
F2
Reset Tare
F3 function key
F3
Tare
F4 Function
F4
Acknowledge
relays
Digital input 1
dI 1
Menu
Digital input 2
dI 2
Right arrow/F1
Digital input 3
dI 3
Up arrow/F2
Factory Defaults & User Settings
The following table shows the factory setting for most of the programmable parameters on the meter.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Parameter
Display
Default Setting
Digital input 4
dI 4
Enter/F3
Digital output 1
dO 1
Alarm 1
Digital output 2
dO 2
Alarm 2
Digital output 3
dO 3
Alarm 3
Parameter
Display
Default Setting
Digital output 4
dO 4
Alarm 4
Password 1
Pass 1
000000 (unlocked)
Password 2
Pass 2
000000 (unlocked)
Password 3
Pass 3
000000 (unlocked)
Symptom
Check/Action
SafeTouch buttons do not respond
If mechanical button was pushed. The SafeTouch buttons will be re-enabled
automatically 60 seconds after the last button push.
If slide switch on connector board is in DISABLE position, switch to ENABLE.
Strong direct sunlight may interfere with SafeTouch button operation. It is
recommended to operate the buttons by standing so as to block direct
sunlight.
Serial Communications Power LED
Indicator is off
1. Check modular cable connection
Check power to the device
If only the TX (or DATA IN) data
status LED is flashing when serial
communications attempted
1. Check serial cable
2. Check protocol selected on device
3. Check instrument address & baud rate
Check program address & baud rate
If both data status LEDs (TX and
RX) are off when trying to
communicate
Remove all unnecessary cables and instruments from the bus. Try getting the
system to work with only one device (to ease troubleshooting) and then
expand the system one device at a time.
Communications slow
Increase the baud rate
Random communication errors
1. Increase the TX delay time
Decrease the baud rate
Power LED is off
1. Check modular cable connection
Check power to instrument
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 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
3. fault
Check:
1. Input selected in Setup menu
2. Signal at Signal connector
3. Input exceeds range selected
Display is unstable
Check:
1. Input signal stability and value
2. Display scaling vs. input signal
3. Filter and bypass values (increase)
4. Increase Rounding value
Display response is too slow
Check filter and bypass values
Display reading is not accurate
Check:
1. Signal input 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.
Troubleshooting Tips (Including FAULT & ERROR Messages)
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Symptom
Check/Action
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.
WARNINGS
• Installation and service should be performed only by trained service
personnel. Service requiring replacement of internal sub-components
must be performed at the factory.
• Disconnect from supply before opening enclosure. Keep cover tight
while circuits are alive. Conduit seals must be installed within 18"
(450mm) of the enclosure.
• Verify that the operating atmosphere of the instrument is consistent
with the appropriate hazardous locations certifications.
• If the instrument is installed in a high voltage environment and a fault
or installation error occurs, high voltage may be present on any lead
• Read all product labels completely and follow all instructions and
requirements listed on the labels for installation or service.
Service
If the enclosure is sound and undamaged, then only the internal electronics housing will need to be
returned to the factory for service. Contact the factory for RMA number and return instructions.
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
Mounting Dimensions
Figure 24: Enclosure Dimensions – Front
View
Figure 25: Enclosure Dimensions – Side
Cross Section View
All units: inches (mm)
64
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Page 65
EU Declaration of Conformity
Issued in accordance with ISO/IEC 17050-1:2004 and ATEX Directive 2014/34/EU.
We,
Precision Digital Corporation
233 South Street
Hopkinton, MA 01748 USA
as the manufacturer, declare under our sole responsibility that the product(s),
Model PD8 ProtEX-MAX Series
to which this declaration relates, is in conformity with the European Union Directives shown below:
2014/35/EU Low Voltage Directive
2014/34/EU ATEX Directive
2014/30/EU EMC Directive
2011/65/EU RoHS Directive
This conformity is based on compliance with the application of harmonized or applicable technical
standards and, when applicable or required, a European Union notified body certification.
Standards:
EN 55022:2007 EN 61000-6-2:2005 EN 60079-0:2009 EN 61000-6-4:2007
EN 60079-1:2007 EN 61010-1:2001 EN 60079-31:2008 EN 61326:2006
The standards EN 55022:2007, EN 60079-0:2009, EN 60079-1:2007, EN 60079-31:2008, EN 61000-64:2007, EN 61010-1:2001, and EN 61326:2006 are no longer harmonized. The requirements of these
standards have been checked against the harmonized standard EN 55022:2010, EN 600790:2012+A11:2013, EN 60079-1:2014, EN 60079-31:2014, EN 61000-6-4:2007+A1:2011, EN 610101:2010, and EN 61326:2013 and there were no major technical changes affecting the latest technical
knowledge for the products listed above.
EC Type Examination Certificate: Sira 12ATEX1182
Product Markings: II 2 G D
Ex d IIC T* Gb
Ex tb IIIC T90°C Db IP68
Tamb = -40°C to +*°C (*T5 = 65°C, *T6 = 60°C)
ATEX Notified Body for EC Type Examination Certificate: Sira Certification Service, NB 0518
Unit 6, Hawarden Industrial Park
Hawarden, Deeside, CH5 3US, UK
ATEX Quality Assurance Notification No.: SIRA 10 ATEX M462
ATEX Notified Body for Quality Assurance: Sira Certification Service, NB 0518
Unit 6, Hawarden Industrial Park
Hawarden, Deeside, CH5 3US, UK
Signed for and on behalf of Precision Digital Corporation:
Name: Jeffrey Peters
Company: Precision Digital Corporation
Title: President
Date: 02/12/2018 Document No: DoC PD8 {021218}
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ProtEX-MAX PD8-6100 Strain Gauge Meter Instruction Manual
PRECISION DIGITAL CORPORATION
LIM8-6100_E
SFT071 ver 4.000 & up
12/18
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