After A Power Failure - HP 5890 Series II Plus Reference Manual

Temperature Control

After a power failure . . .

Figure 3-7
Thermal Control FAULT: Messages
In addition to the message, the red NOT READY LED blinks. All zones
and the oven are turned off and made inoperative until power is switched
off, and then on again (setpoints are maintained).
After a power failure . . .
Setpoint values are protected during a power failure (even if intentional,
by disconnecting the power cord, or by switching off the HP 5890 at its
main power switch) by a lithium battery (10•yearnominal life) which
maintains power to HP 5890 memory.
After power is restored, a message is displayed, as shown in Figure 3•8.
FAULT: ADC
FAULT: LINE
FAULT: INJA
FAULT: DETA
FAULT: OVEN
FAULT: OVEN
ACTUAL SETPOINT
OFFSET
ACTUAL SETPOINT
SENSE
ACTUAL SETPOINT
TEMP RDG
ACTUAL SETPOINT
TEMP RDG
ACTUAL SETPOINT
TEMP RDG
ACTUAL SETPOINT
> MAX+20
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