General Tools and Instruments DCT2001 - Manual (Page 11)

4-3 Calibration procedures of Conductivity meter
The meter has been calibrated during manufacture.
However, it may be necessary to re-calibrate periodically.
Particularly when the instrument is used for a long period or
when the conductivity electrode is changed.
To re-calibrate the instrument, follow the procedures
shown below :
Range 1 ( 2 mS range ) calibration
1) Prepare a " 1.413 mS Calibration Solution ".
2) Immerse the head of " Conductivity Probe " ( 3-17, Fig. 1 )
into the 1,413 mS solution up to the immersion level.
3) Select the range to the " 2 mS " position.
4) Set the temperature coefficient factor value to " 2.0% per
蚓
"
5) At the same time push the following buttons together :
a. REC.( MAX./MIN. ) Button ( 3-3, Fig. 1 )
b. HOLD Button ( 3-4, Fig. 1 )
The upper display will show the flashing text of " CAL ".
The low display will show the flashing text of " 1.413 ".
6) Please release the two buttons when the display shows as
above and start flashing and then when the text stop
flashing, the range 1 will be calibrated to 1.413 mS
( There maybe a little deviation, and it is normal ).
* After released two buttons but before the text (CAL,
1.413 ) stop flashing, if push the " HOLD Button " will
cancel the calibration procedures, the meter will return
to previous calibration value.
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