Memmert ONE 7 - 45 Oilbath (Generation 2003) - Manual (Page 16)

EXCELLENT page 16
4.3.8.1 Calibration
Customer calibration of the bath on the controller using a self-selected calibration temperature. A positive
or negative calibration difference against it can be set.
General calibration instructions:
1.
Set the required calibration temperature and set the calibration difference to 0.0°C
(see below “set calibration temperature“ and “set calibration difference“).
2.
Measure the deviation from the selected calibration temperature under steady conditions, using a
reference instrument.
3. Set the calibration difference. If the measured reference temperature is lower than the indicated
value, the calibration difference has to be set with a negative sign.
4. Carry out a check measurement using the reference meter.
Example: Temperature difference between controller display (e.g. 70.0°C) and bath liquid (e.g. 69,0°C) has
to be corrected.
1.
Set calibration temperature to 70.0°C and set calibration difference to 0.0°C.
2. Using a calibrated reference instrument, the measured temperature is 69.0°C at a setpoint
temperature of 70.0°C.
3.
Set calibration difference to –1.0°C.
4. After the bath has settled down the reference instrument should read 70.0°C.
Adjustment range: calibration temperature:
waterbaths: 10°C to 95°C
oilbaths:
20
°C to 200°C
Adjustment range: calibration difference:
water-/oilbaths: -5.0°C to 5.0°C
Set calibration temperature:
Rotate the push/turn control until
flashes.
The calibration temperature can then be set with the SET key depressed as
described in section 4.3.
Set calibration difference:
Rotate the push/turn control until
flashes.
The calibration difference can then be set with the SET key depressed as described
in section 4.3.
°C
°C
°C
°C
Note:
Setting the calibration difference to 0.0°C restores the factory calibration!
[°C] 0 100 50
calibration
difference -1°C
calibration
temperature
70°C
factory temperature
measurement
corrected temperature
measurement