Labnet 611D Laboratory Incubators - Manual (Page 15)

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including motors, arcing relays or radio transmitters.
7/ Bad connection on temperature sensor or faulty
sensor – check connectors for continuity and
mechanical soundness while watching display for
erratic behavior; 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.
Temp-9 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.
Temp-10 Display and reference
thermometer don’t
match
1/ Calibration error – see section 7.4.
2/ Temperature sensor failure – evaluate if pilot light is
operating correctly.
3/ Controller failure – evaluate if pilot light is operating
correctly.
4/ Allow at least 24 hours to stabilize at set point
temperature.
5/ Verify that reference thermometer is certified.
Temp-11 Can't adjust set points
or calibration
1/ Turn entire unit off and on to reset.
2/ If repeatedly happens, call Customer Service.
Temp-12 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.
MECHANICAL
Mech-1 Door not sealing
1/ Check physical condition of gasket.
2/ Tighten door latch till it pulls glass in.
3/ Assure that gasket is in original location.
4/ Adjust hinge blocks or twist the door.
5/ Confirm that unit has not been damaged and body
is square.
Mech-2 Motor doesn't move