15
check sensor and wiring for mechanical damage.
8/ Bad connections – check connectors for mechanical
soundness and look for corrosion around terminals or
signs of arcing or other visible deterioration.
9/ Water jacket empty or low – check indicator warning
light or water level at fill port in back of unit.
Will not maintain set point
1 / Assure that set point is at least 5 degrees over
ambient.
2/ See if ambient is fluctuating – check for adjacent open
doors or HVAC duct openings, stabilize ambient
conditions.
Display and reference
thermometer don’t match
1/ Calibration error – see section 5.6.
2/ Temperature sensor failure – evaluate if pilot light is
operating correctly.
3/ Controller failure – evaluate if pilot light is operating
correctly.
4/ Verify that reference thermometer is certified.
Can't adjust set points or
calibration
1/ Turn entire unit off and on to reset.
2/ If repeatedly happens, call Customer Service.
Calibrated at one temperature,
but not at another
This can be a normal condition when operating
temperature varies widely. For maximum accuracy,
calibration should be done at or as close to the set point
temperature as possible.
HUMIDITY LEVEL
Can't achieve desired humidity
level
1/ Door opened recently or too frequently.
2/ Humidity pan empty.
3/ Access port not plugged.
4/ Poor glass door seal.
5/ Water in humidity pan contaminated.
Can’t decrease humidity
1/ Hot water added to humidity pan.
Condensation in chamber
1/ Small amount of condensation in chamber may be
normal depending on nature of test sample.
2/ Water jacket too low or empty.
3/ Power failure or unit was turned off for a while without
opening the door.
Condensate appears on chamber
walls
1/ If condensate on steel, turn temperature control on door
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