Metrohm 743 Rancimat - Manual (Page 170)

5.4 Self test when switching on ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
162 ￭￭￭￭￭￭￭￭ 743 Rancimat
5.4 Self test when switching on
An internal hardware self test executes after switching on the instrument.
Each one of the 7 test steps lasts around one second and is displayed on
the instrument number display (2-5) by a combination sample of the 4 dis-
play lamps. In the case of an error, the corresponding LEDs flash.
Display Cause Remedy
Device LED test. If not all LEDs
light up during this test,
an LED is defective. Notify Metrohm Service.
Device RAM test error. Switch the instrument
off and on again. If the
error occurs again,
please notify Metrohm
Service.
Device PROM checksum test
error. Switch the instrument
off and on again. If the
error occurs again,
please notify Metrohm
Service.
Device BUSY test error. Switch the instrument
off and on again. If the
error occurs again,
please notify Metrohm
Service.
Device ADC test error. Switch the instrument
off and on again. If the
error occurs again,
please notify Metrohm
Service.
Device EEPROM test error. Switch the instrument
off and on again. If the
error occurs again,
please notify Metrohm
Service.
Device Defective mains voltage
(deviation > 10 %). Check power supply.