MAINTENANCE, TROUBLEShOOTING
AND CUSTOMER SUPPORT
CHANGING BATTERIES
When the red LED labeled “Low Battery” is illuminated, it’s time to
replace the unit’s four AA” Alkaline batteries.
To replace the batteries, first use a Phillips-head screwdriver to loosen
the screw at the bottom of the CGD900 in a counterclockwise direction.
Then open the hinged door and remove the old batteries from the two
compartments while noting their polarity orientation.
Insert two fresh batteries in the right compartment (+) end first, and
then insert two more in the left compartment (-) end first. To help you
do this correctly, there are (-) and
(-) marks on the hinged door. Be
sure each mark ends up adjacent
to the end of a battery with match-
ing polarity (see figure).
NOTE:
If you may not be using the CGD900 for months,
remove at least one battery to avoid the possibility of
battery leakage ruining the unit.
REPLACING THE SENSOR
To replace the CGD900’s sensor, which is at
the end of the probe, first unscrew its metal
cover counterclockwise. Then gently pull out
the old sensor, which has four leads. Finally,
install the new sensor by aligning the notch
in the sensor’s socket with the raised tab on
the socket holder (see figure).
NOTE:
Do not force the sensor into the socket. Mis-
alignment can damage the sensor pins. Insert the new
sensor into the socket by pushing it directly in, without
twisting.
6
Replace the leak test vial when its contents no longer
appear green.
MAINTENANCE, TROUBLESHOOTING AND
CUSTOMER SUPPORT
Changing batteries
When the red LED labeled “Low Battery” is illuminated, it’s time to
replace the unit’s four AA” Alkaline batteries.
To replace the batteries, first use a Phillips-head screwdriver to loosen
the screw at the bottom of the CGD900 in a counterclockwise direction.
Then open the hinged door and remove the old batteries from the two
compartments while noting their polarity orientation.
Insert two fresh batteries in the right compartment (+) end first, and
then insert two more in the left compartment (-) end first. To help you
do this correctly, there are (-) and (-) marks on the hinged door. Be sure
each mark ends up adjacent to the end of a battery with matching
polarity (see figure).
Note: If you may not be using the CGD900 for months, remove
at least one battery to avoid the possibility of battery leakage
ruining the unit.
Polarity Mark
CGD900 Manual_FINAL2_091410:Layout 1 9/14/10 1:32 PM Page 6