Yamato Scientific HF200 Heating Block - Manual (Page 25)

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2. How to operate the unit
Other functions
Calibration offset function
The calibration offset function is to ensure agreement between the bath temperature and set
temperature by compensating the temperature difference, if any, between the bath temperature
actually measured with the reference thermometer or temperature recorder and the temperature set
with the controller (as read on the controller).
Enter the plus-side temperature difference to the calibration offset setting when the bath
temperature exceeds the set value and the minus-side temperature difference to the above setting
when the bath temperature is lower than the set level.
1.Measure the bath temperature
Wait till the bath temperature stabilizes, then check the difference between the bath temperature and
the measurement indicator of this device. The bath temperature can be measured correctly by using
the calibrated temperature recorder in the small amount of silicone oil filled into the aluminum block.
Current temperature
Temperature after compensation
on the minus side
Temperature after
compensation on the plus
side
Small amount (about 2 ml) of silicone oil
（for the aluminum block for 16.5 ㎜ test tube）
Temperature recorder sensor
Aluminum block