PD6870 EXPLOSION-PROOF
LOOP-POWERED PROCESS METER
4-20 mA input
1 V drop (4 V with Backlight)
3½ Digits LCD, 1" High
Loop-Powered Backlight Option
HART® Protocol Transparent
Explosion-Proof, IP68, NEMA 4X Enclosure
Flanges for Wall or Pipe Mounting
Easy Calibration and Installation
Operates from -40 to 75°C
PRECISION DIGITAL CORPORATION
89 October Hill Road • Holliston MA 01746 USA
Tel (800) 343-1001 • Fax (508) 655-8990
www.predig.com
PD6870 Loop-Powered Process Meter Instruction Manual
!
CAUTION: Read complete
instructions prior to installation
and operation of the meter.
WARNING: Risk of
electric shock or
personal injury.
Disclaimer
The information contained in this document is subject to change without notice.
Precision Digital makes no representations or warranties with respect to the contents
hereof; and specifically disclaims any implied warranties of merchantability or fitness
for a particular purpose.
WARNINGS
• 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 meter cover in explosive environments when the circuit is
live.
• Cover must be fully engaged to meet flameproof/explsion-proof requirements.
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
All trademarks mentioned in this document are the property of their respective
owners.
© 2011-2015 Precision Digital Corporation. All rights reserved.
www.predig.com
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PD6870 Loop-Powered Process Meter Instruction Manual
Model
Description
PD6870-0L0
Explosion-Proof Loop-Powered Process Meter
PD6870-0K0
Explosion-Proof Loop-Powered Process Meter
with Backlight
Model
Description
PDA0001
3/4" M-NPT to F-M20 Reducer
PDA0002
3/4" M-NPT to 1/2" F-NPT Reducer
INTRODUCTION
The ProtEX-FarVu PD6870 is a rugged, loop-powered meter with 1" display digits in
an explosion-proof enclosure for demanding applications in hazardous areas or in the
harshest environmental conditions. The meter derives all of its power from the 4-20
mA loop with a small 1 volt drop for easy installation in almost any system.
It is programmed using four easy to access front-mounted control dials with no
complex or difficult to read programming menus necessary for setup. The numeric
display will read from -1999 to 1999 over a 2000 count user adjustable scaling span.
The backlight option lets you see the display under any lighting condition and is
powered from the 4-20 mA loop with no additional power supply required.
The enclosure is provided with two threaded conduit holes and integrated pipe or wall
mounting slotted flanges.
ORDERING INFORMATION
Accessories
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PD6870 Loop-Powered Process Meter Instruction Manual
Table of Contents
INTRODUCTION ---------------------------------------------------------------------- 3
ORDERING INFORMATION ------------------------------------------------------- 3
SPECIFICATIONS -------------------------------------------------------------------- 5
General ------------------------------------------------------------------------------------------- 5
Input ----------------------------------------------------------------------------------------------- 6
Product Ratings and Approvals --------------------------------------------------------- 7
Electromagnetic Compatibility ----------------------------------------------------------- 8
SAFETY INFORMATION ----------------------------------------------------------- 8
INSTALLATION ----------------------------------------------------------------------- 9
Unpacking ------------------------------------------------------------------------------------- 10
Pre-Installed Conduit Plug --------------------------------------------------------------- 10
Mounting --------------------------------------------------------------------------------------- 10
PD6870 Connections ---------------------------------------------------------------------- 11
Connections & Wiring Diagrams ............................................................... 12
SETUP ---------------------------------------------------------------------------------- 13
Scaling Controls and Display ----------------------------------------------------------- 13
Setting Up the Meter ----------------------------------------------------------------------- 14
Calibrating the Meter ................................ ................................................ 14
Setting the Decimal Point ......................................................................... 14
Factory Defaults & User Settings ----------------------------------------------------- 15
TROUBLESHOOTING ------------------------------------------------------------- 16
Troubleshooting Tips ---------------------------------------------------------------------- 16
MOUNTING DIMENSIONS -------------------------------------------------------- 17
EC DECLARATION OF CONFORMITY --------------------------------------- 19
Table of Figures
Figure 1. PD6870 Connectors ................................................................. 11
Figure 2. PD6870 Input Connections without Backlight ....................... 12
Figure 3. PD6870 Input Connections with Loop-Powered Backlight ... 12
Figure 4. Enclosure Dimensions – Front View ...................................... 17
Figure 5. Enclosure Dimensions – Side Cross Section View ............... 18
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PD6870 Loop-Powered Process Meter Instruction Manual
DISPLAY
3 ½ digit LCD
1" (25.4 mm); -1999 to 1999
DISPLAY
UPDATE RATE
2.5 Updates/Second
OVERRANGE
Display reads 1 on the left most digit
PROGRAMMING
METHOD
Four front mounted rotary control dials accessed when the
cover is removed.
RECALIBRATION
Recalibration is recommended at least every 12 months.
NORMAL MODE
REJECTION
60 dB rejection ratio
ENVIRONMENTAL
Operating temperature range: -40 to 75°C
Storage temperature range: -40 to 75°C
Relative humidity: 0 to 90% non-condensing
CONNECTIONS
Screw terminals accept 12 to 22 AWG wire
ENCLOSURE
Explosion-proof die cast aluminum with glass window, 0.30%
max copper content, corrosion resistant epoxy coating, color:
blue. NEMA 4X, IP68.
Two ¾" NPT threaded conduit openings. One ¾" NPT nickel
plated brass conduit plug with 10 mm hex key fitting installed.
MOUNTING
May be mounted directly to conduit. Two slotted flanges for
wall mounting or NPS 1½" to 2½" or DN 40 to 65 mm pipe
mounting. See Mounting Dimensions on page 17.
OVERALL
DIMENSIONS
5.65" x 5.25" x 4.86"
(144 mm x 133 mm x 124 mm) (W x H x D)
WEIGHT
5.00 lbs (80 oz, 2.27 kg)
WARRANTY
3 years parts and labor
SPECIFICATIONS
Except where noted all specifications apply to operation at +25°C.
General
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PD6870 Loop-Powered Process Meter Instruction Manual
ACCURACY
±0.1% of full span ±1 count
TEMPERATURE
DRIFT
150 PPM/C from -40 to 75C ambient
DECIMAL POINT
User selectable decimal point
CALIBRATION
RANGE
4 mA input: -1000 to +1000; 20 mA between 20 and 2000
counts greater than 4 mA display.
Two point linear display span.
MAXIMUM
VOLTAGE DROP
Without Backlight
With Loop-Powered
Backlight
1 VDC @ 20 mA
4 VDC @ 20 mA
EQUIVALENT
RESISTANCE
50 Ω @ 20 mA
200 Ω @ 20 mA
INPUT
OVERLOAD
Over current protection to 2 A max.
Input
6
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