Preferred Instruments
Div. of Preferred Utilities Manufacturing Corp
.
Phone (203) 743-6741, Fax (203) 798-7313
www.preferredinstruments.com
Installation and Operation Manual JC-22-PL2-1006 rev. 6 6-5-17
Page 12 of 12
Pressure Range Conversion:
The controller pressure range can be set in the field to either:
0” to +2” or 0” to -2”
Changing the Control Range: 0 to -2”wc versus 0 to + 2”wc
1)
Disconnect all electrical power sources, multiple disconnects many be
required.
2)
Disconnect the external sample line.
3)
Remove the two mounting screws next to sample line connection.
4)
Remove the Controller and un-plug the cable connected to the board.
5)
Connect the sample line and set the DIP switch as follows:
For 0 to
-2”
operation
Attach the sample tube to: sensor port
P1
Set DIP switch 4 to:
OFF
For 0 to
+2”
operation
Attach the sample tube to: sensor port
P2
Set DIP switch 4 to:
ON
6)
Reverse steps 4 thru 1 to re-assemble.
P2
TRANSFORMER
P1
PRESSURE
SENSOR
DIP SWITCH
PRESSURE PID CONTROLLER BOARD
(REAR VIEW)
0" TO
-2"
RANGE IS SHOWN
(FACTORY CONFIGURATION)
OFF
ON
1 2 3 4
