YSI Model 52, Operation Manual

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YSI, Incorporated Model 52 26
SECTION 8 MAINTENANCE AND
TROUBLESHOOTING
8.1 BATTERIES
Low batteries are indicated in the display by an arrow pointing to LO BATT, as shown
here
LO BATT
When this happens, replace the batteries with 6 fresh alkaline batteries as soon as
possible. Remove the 4 case screws from the back of the meter and carefully lift the back
cover away from the rest of the meter. The battery pack is attached to the back cover.
Insert three fresh alkaline batteries into each tube. Always observe the correct polarity
while installing new batteries.
Should you accidentally pull the case halves too far apart, an in-line connector will
unplug, preventing any damage. If this happens, rejoin the connectors. (You cannot do it
wrong.) Before closing the case be sure that the connector is seated in the clip attached to
the side of the battery pack. This will help keep the wires out of the way and prevent
interference with the circuit boards.
Before rejoining the case halves, be sure the O-ring gasket is properly seated in its groove
on the front case half. It must be evenly distributed along the perimeter without any kinks.
With the O-ring properly seated in the front half of the case, replace the back half and
install the four screws.
8.2
POWER ON SELF-TESTING AND ERROR DISPLAY MESSAGES
The instrument will perform a Power On Self Test each time it is turned on. The
following error codes are provided to facilitate troubleshooting. The E.0 through E.1
Error Modes could be displayed at any time if a system error is detected. The E.2 through
E.4 messages can be displayed only during calibration.
#
# #
# 7 . 9 2 m g / L 2 2 . 5 C
8 6 . 0 % 1 4 : 1 5