General Tools and Instruments DPHC2001 - Manual (Page 15)

@ Use the " Up Button " ( 3-5, Fig. 1 ) and the " Down
Button " ( 3-8, Fig. 1 ) to adjust the PH 4 default
calibration value.
@ The adjustment range of " PH4 default calibration value "
is limited within 4.0 0.20 PH
c. Adjust the PH 7 default value
* When the PH 4 default value be adjusted. Press
the " TEMP. C Button " ( 3-7, Fig. 1 ) once
again to adjust the PH 7 default calibration
value.
The upper display will show the values of " 7.00 " and
the lower display will show the " PH 7 default
calibration value ".
PH
7.00
07.12
@ Use the " Up Button " ( 3-5, Fig. 1 ) and the "
Down Button " ( 3-8, Fig. 1 ) to adjust the PH 7
default calibration value.
@ The adjustment range of " PH 7 default calibration
value " is limited within 7.0 0.20 PH.
d. Adjust the PH 10 Default Value
* When the PH 7 default calibration value be
adjusted. Press the " TEMP. C Button " ( 3-7,
Fig. 1 ) once again to adjust the PH 10 default
calibration value.
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