Temperature Control
Fault: messages
52
The message displayed when this occurs is shown in Figure 3•6.
ACTUAL SETPOINT
WARN: OVEN SHUT OFF
Message, Oven SHUT DOWN
Figure 3-6
The oven remains off until switched on again via the keyboard
(
OVEN TEMP
ON
), unless a FAULT: message is displayed (see below,
Fault: messages). Power to the instrument must be switched off, and then
on again to restore operation (setpoints are maintained).
Fault: messages
Figure 3•7shows possible FAULT: messages associated with heated zones
or the oven. In general, the following problems are indicated when a
FAULT: message appears:
ADC OFFSET indicates a problem with one or more electronic
components in circuitry associated with temperature control.
LINE SENSE indicates a problem with AC power to the instrument
(an excessively high source voltage).
Any of the TEMP RDG messages indicate an inoperative temperature
sensor for the indicated zone or oven.
OVEN > MAX + 20 indicates oven temperature exceeds the current
OVEN MAX
setpoint value by more than 20 C. Thermal run•awayis
the likely cause.
Note: In case multiple problems exist simultaneously, press
CLEAR
to
roll through all message displays.
