NEW BRUNSWICK SCIENTIFIC CO28IR, Руководство по эксплуатации

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CO28IR CO
2
Incubators with HEPA M1271-0051 User’s Manual
Symptom Possible Cause(s) & Solution(s)
TEMPERATURE CONTROL (continued)
Display reads "LO" 1. If ambient temperature is lower than range of
unit: compare setpoints and ambient
temperature to rated specifications in Section
10.
2. Sensor is plugged in backwards: reverse
sensor wires to controller.
Unit will not heat over a temperature that
is below setpoint 1. Confirm that fan is moving and that amperage
and voltage match data plate: check fan motor
motion in electronics compartment and feel for
air movement in chamber.
2. Confirm that setpoint is set high enough: turn
Safety all the way clockwise and see if heating
light or safety light comes on.
3. Check connections to sensor.
4. Check calibration: using independent thermo-
meter, follow instructions in Sections 5.4 and 5.8.
Unit will not heat up at all 1. Verify that controller is asking for heat by
looking for controller light: if pilot light is not on
continuously during initial start-up, there is a
problem with the controller.
2. Check amperage: amperage should be virtually
at maximum rating (see data plate).
3. Do all controller functions work?
4. Is the Safety set high enough? For diagnostics,
should be fully clockwise with the pilot light
never on.
5. Has the fuse/circuit breaker blown?
Indicated chamber temperature unstable 1. ±0.1 may be normal.
2. Is fan working? Remove top panel and verify
movement of fan in center of chamber.
3. Is ambient radically changing–either door
opening or room airflow from heaters or air
conditioning? Stabilize ambient conditions.
4. Sensor mislocated, damaged or wires may be
damaged: check mounts for control and High
Limit sensors, then trace wires or tubing
between sensors and controls.
5. Calibration sensitivity: call Customer Service.
6. Safety set too low: be sure that its setting is
more than 5º over the desired setpoint; check if
pilot light is on continuously; turn controller knob
completely clockwise to see if problem is solved
then follow instructions in section 5.8 for correct
setting.
7. Electrical noise: remove nearby sources of RFI
including motors, arcing relays or radio
transmitters.
...continued...