Sper Scientific 860031 pH - mV Bench-Top Meter - Manual (Page 32)

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1999 range), the previous 1413 uS calibration point will be
replaced in this range (0 ~ 1999 uS). However, the meter
will retain the calibration data for other ranges that have not
yet been calibrated.
Note…
The temperature coefficient of the meter defaults to 2.1%
per °C and provides good results for most applications. To
reset the coefficient, see P5.2 on page 23.
Selecting Calibration Schedule
For first use and best results, use solution to calibrate.
If the conductivity of the measured solution is < 100 µS or
the TDS is < 50 ppm, calibrate the meter weekly to achieve
the specified accuracy.
If the meter is used in the mid ranges, calibrate the unit
monthly.
If the measurement is performed at extreme temperatures,
calibrate the unit weekly.
To Calibrate:
1. Insert the probe into deionized or distilled water for
about 30 minutes to rinse the probe.
2. Select the conductivity standard for calibration. (Refer to
page 31.)
3. Pour 4 cm (deep) of buffer solution into two separate
containers (A & B).
CONDUCTIVITY PROBE CALIBRATION