WP4C 11 TROUBLESHOOTING
• Check to make sure your power cord is securely attached to the
back of the instrument and the power outlet.
• A power sure may have caused a fuse to blow. Follow steps 1
through 5 to change the fuses.
1. Unplug the power cord from the wall and the instrument.
2. Locate the panel where the power cord plugs in. The fuse
box is on the right side of that panel. Press in on the
release tab and pull the fuse-holder out.
3. Pull the broken fuse(s) out and replace with a 2.0 Amp
250 V fuse. Caution: Do not use any other kind of fuse
or you will risk damage to your instrument and void your
warranty.
4. Replace the fuse-holder and push it into the fuse-well until
the release tab snaps into place.
5. Reconnect the power cord and turn your instrument on.
If the fuse blows again, a failed component may be caus-
ing the problem. Contact METER to make arrangements
for repairs if your problem persists.
2. PROBLEM:
Readings are slow or inconsistent.
SOLUTION:
• The sample chamber may be dirty. Refer to Chapter 10 of the
manual for directions on cleaning the sample chamber.
• Some samples absorb or desorb moisture very slowly, causing
measurements to take longer than usual, and nothing can be
done to speed up the process. Refer to Chapter 6 for further
explanation.
• The fan blade inside the block chamber may be broken. If even
the KCl standard takes a long time to read, and the sample
chamber is clean, you may have a broken or bent chamber
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