MERIDIAN
UNIVERSAL GAS DETECTOR
MAINTENANCE
7-18
USE AND DISCLOSURE OF DATA
Information contained herein is classified as EAR99 under the U.S. Export Administration Regulations. Export, reexport or diversion contrary to U.S. law is
prohibited.
13. Press
UP
or
DN
to increase or decrease the current on the loop until you have 20mA at your point of mea
-
surement.
14. Select
ENTER/MENU
.
15. Press
ESC
. Screen displays
SAVE CHANGES?
.
16. Press
ENT/MENU
. Screen displays
SAVING
, and then returns to
MERIDIAN SETUP
.
17. Press
ESC
three times to return to the main menu.
7.3.8 Replacing the LCD PCB/CPU PCB
1. Unscrew the setscrew and housing cover, then pull on the LCD PCB/CPU PCB set, removing it from the four (4)
standoffs.
2. Remove the wire ribbon cable from the LCD PCB/CPU PCB.
3. Replace the LCD PCB/CPU PCB and repeat the above steps in reverse.
4. Replace the housing cover, tighten and secure the setscrew.
WARNING:
ENSURE RECEIVERS AND POWER SUPPLIES ARE NOT POWERED WHEN
INSTALLING WIRE TO THE DEVICE.
WARNING:
ENSURE THE ATMOSPHERE IS FREE FROM COMBUSTIBLE AND/OR TOXIC
GASES PRIOR TO STARTING THIS PROCEDURE. FAILURE TO DO SO COULD RESULT IN
INJURY OR DEATH.