H69.0.01.6C-02
Operating Manual GMH 285 / GMH 285-BNC
page 7 of 8
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8 Adjustment
The instrument can be adjusted, assuming that: Reliable references are available, such as ice-
water regulated precision water baths or similar.
:
Displayed value °C =(measured value °C - OFFS) * (1 + slope correction / 100 )
Displayed value °F =(measured value °F - 32 °F - OFFS) * (1 + slope correction / 100 )
Follow these instructions to adjust the device:
Switch the device on.
Press
and
together until
the first parameter “
0FFS
” is displayed.
Set parameter with
= up or
= down
Jump to the next parameter by pressing
.
Parameter Value
Information
Key
Keys
OFFSET correction
factory setting: oFF = 0.0°C
OFF
No offset correction
-5.0
…
5.0
°C
or
-9.0
…
9.0
°F
Value of offset correction
Slope correction
factory setting: oFF= 0%
OFF
No slope correction
-5.00
…
5.00
Value of slope correction in %
Press
again to store changed settings, the device restarts (segment test).
NOTE:
If there is no key pressed within the menu mode within 2 minutes, the configuration will
be cancelled, the entered settings are lost!
9 Error and System Messages
----
No temperature probe connected
Or at GMH 285 BNC: cable/sensor broken
Or at GMH 285: cable/sensor shorted
ERR. 1
Value exceeding measuring range, value too high or cable/sensor broken
ERR. 2
Value exceeding measuring range, value too low or cable/sensor shorted
ERR. 7
System error – the device has detected a system error (device defective or not within
working temperature)
The blinking bAt display indicates low battery voltage, device will continue to work for a
short time.
The battery is consumed and has to be changed. Measurements are no longer
possible.
10 Accuracy Inspection: Adjustment /Update Service
You can send the device to the manufacture or retailer for adjustment and inspection.
Moreover the manufacturer can do the latest software update. This ensures that future
improvements are provided to owners of older devices in a cost-saving way. You can display the
current software version if you do not release the on/off button after you switched the device on, but
hold it for more than 5 seconds. (i.e. “r. 1.0”)
