Nova-Tech pH 110 - Manual (Page 17)

Instruction Manual CyberScan pH 11 / 110
13
4.3 pH Calibration with ATC
NOTE: We recommend that you perform at least 2-point calibration using standard
buffers that bracket (one above and one below) the expected sample range.
1. If necessary, press the MODE key to select pH
mode. The pH indicator appears in the upper
right hand corner of the display.
2. Rinse the probe thoroughly with de-ionised
water or a rinse solution. Do not wipe the
probe; this causes a build-up of electrostatic
charge on the glass surface.
3. Dip the probe into the calibration buffer. The
end of the probe must be completely immersed
into the sample. Stir the probe gently to create a
homogeneous sample.
4. Press CAL/MEAS key to enter pH calibration
mode. The CAL indicator will be shown. The
primary display will show the measured reading
while the smaller secondary display will indicate
the pH standard buffer solution.
5. Wait for the measured pH value to stabilise
(The READY indicator will be shown only if it is
activated in the set up menu).
6. Press HOLD/ENTER key to confirm calibration.
The meter is now calibrated to the current
buffer.
See figure on right.
MEAS
pH
ATC
°C
7.16
22.3
CAL
pH
pH
7.16
7.00
CAL
pH
pH
READY
7.16
7.00
CAL
pH
pH
READY
7.00
7.00
MEAS
CAL
ENTER
HOLD
Figure 11: pH Calibration
sequence
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