WP
4
PotentiaMeter
Troubleshooting
63
SOLUTION:
This indicates that the temperature control module
inside the WP4-T is broken or not functioning cor-
rectly. When the instrument senses that there is a
problem with the temperature control module, it
removes that function as an option to the user as a
precaution. Contact Decagon for service informa-
tion.
Component Performance Screen
If, after cleaning your instrument and reading the
other troubleshooting hints, you have reason to
believe that one of the components of your WP4
may be causing measurement error, you can access
a screen that will display values for component per-
formance. This is done by holding down the lower
right button while turning on the instrument. After it
initializes, it will beep and come to the following
screen:
This screen gives you four values. The top left value
is the value the thermocouple is reading. It is basi-
cally the difference in temperature between the
block and the mirror. If this is zero, there is some-
thing wrong with the thermocouple. The top right
-Exit-
sensors
3.36 0.030
23.5 0.665
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