The display will remain inoperable during a power outage to preserve battery
life. Measurements will continue to be recorded as long as the battery has a
charge.
On power up the thermo-hygrometer performs a series of self-tests to check the
operation of all its components and each of the sensors. The results of the
self-tests are reported on the screen. Normally, all tests report ‘OK’. Below is a
table of error messages and recommended actions to correct the error. Often
these errors can be corrected by completing the actions listed. A failure of one
or more component causes error messages to be reported.
Contact a Hart Scientific Authorized Service Center for assistance (see Section
1.3).
11.1.5
Self-Test Error Messages
SYSTEMS: SERIAL PORT FAILURE
Cycle the power. Contact an Authorized Service Center.
SYSTEMS: IR PORT FAILURE
Cycle the power. Contact an Authorized Service Center.
SYSTEMS: DATA CARD FAILURE
Cycle the power. Contact an Authorized Service Center.
BATTERY: FAILURE
Cycle the power. Contact an Authorized Service Center.
BATTERY: NOT INSTALLED
Check that a battery is properly installed. Replace the battery.
CLOCK: INVALID TIME
Set the time/date.
MEMORY DATA: EMPTY
Contact an Authorized Service Center.
MEMORY DATA: QUESTIONABLE
Cycle the power. Contact an Authorized Service Center.
SENSOR <n>: NOT ATTACHED
Check that the sensors are properly inserted into their sockets or attached
with an undamaged extension cable.
SENSOR <n>: LOCKED
Attach the correct sensor or, if a new sensor is to be used, unlock the sen-
sor using CHANNEL-SENSOR LOCK.
SENSOR <n>: CALIBRATION INVALID Cycle the power. Try a different sensor. Contact an Authorized Service
Center.
SENSOR <n>: CALIBRATION EXPIRED Contact an Authorized Service Center to have the sensor recalibrated.
Check the time/date to make sure it is correct.
POWER DOWN: CALCULATION ERROR Contact an Authorized Service Center.
POWER DOWN: SOFTWARE RESET
Contact an Authorized Service Center.
POWER DOWN: HARDWARE RESET
Contact an Authorized Service Center.
BUTTONS: <button name>...
Check to make sure the buttons are not being pressed. Cycle the power.
Contact an Authorized Service Center.
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Hart Scientific
11 Troubleshooting
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