Grant QBA Mode D'emploi page 6

Heating Error Detection (QBD\QBH)
If the processor detects an error in heating the fault light will illuminate, the buzzer
will beep and the display will flash . To reset this fault; switch the unit off and
on. If the fault re-occurs contact your local service agent or Grant Instruments: con-
tact details can be found towards the rear of this manual.
Adjustable Over-Temperature Protection Device (QBH)
The QBH is fitted with an adjustable over-temperature protection device at the rear
of the unit. This device is designed to protect the sample not the user from harm. If
operated it will display the same fault as above.
To set the device use the following procedure:
a) Turn the knob of the protection thermostat to maximum (clockwise)
b) Set the control temperature to 2°C above the desired operating temperature
and wait for the temperature to stabilise
c) Slowly turn the knob down until a click is heard and -ot- is displayed
d) Reset the control temperature to the desired operating temperature
28089 Ver 12
Page 5
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QBD, QBA, QBH,
Operating Manual