Adjusting Lcd Contrast And Brightness; Clearing Totals - GE XGS868 Programming Manual

Adjusting LCD Contrast
and Brightness

Clearing Totals

Displaying and Handling Data
Both the contrast and the brightness of the optional LCD may be
adjusted to suit individual needs. As shown in the upper right view of
Figure 4-1 on page 4-12 of the Service Manual, there are two 3/4-turn
adjustment potentiometers located on the LCD circuit board. Using
these pots for the LCD adjustment, complete the following steps:
Never remove the covers from the XGS868 in a hazardous
environment while the line power is on.
1. Make sure the XGS868 is in a safe environment, and loosen the
set screw to remove the front cover (see Chapter 4, Parts
Replacement, in the Service Manual for details, if necessary).
IMPORTANT:
If the XGS868 is to be installed in a hazardous
environment, adjust the LCD brightness and contrast
in a safe area, before mounting the enclosure.
2. With power still applied to the meter, carefully use a small
screwdriver to adjust the LCD brightness. Turning the
(backlight) pot fully clockwise yields maximum brightness.
3. In a similar manner, adjust the
contrast as desired. At either extreme of the
is unreadable; turn the pot fully counterclockwise and then turn it
clockwise very slowly until the display is clear.
4. Readjust the
BKLT
control, as desired.
5. Replace the front cover on the XGS868, and secure it in place with
the set screw.
The meter may now be placed back into service.
When clearing totals, the totals for both channels will be reset. Refer
to Figure A-6 in Appendix A.
1. Open the System menu.
2. Select Clear Instrument Totalizers.
3. IDM automatically clears the totalizers and exits the System
menu.
!WARNING!
CONT
(contrast) pot to set the LCD
CONT
November 2004
BKLT
pot, the display
2-3