Halma Palintest Potatech+ Manual page 34

8
Pocket Conductivity Sensor
Manual Calibration
1 Make sure the tester is in measuring mode.
Rinse the electrode with the calibration
standard that you intend to calibrate and
then dip the electrode in the other beaker
with same calibration standard. Swirl gently
and allow time for the reading to stabilise.
2 Press INC or DEC key to enter calibration
mode. The 'CAL' indicator appears in LCD.
3 The upper display shows the measured
conductivity reading of the solution based
on previous calibration (if any) and the lower
display shows the default (uncalibrated)
conductivity reading. Note: The tester shows
error message 'Er.1':
(a) If the reading is over range (Or) of selected
measuring range of the tester, or
(b) If the default (uncalibrated) reading is not
within the acceptable calibration standard
range. Use INC and DEC keys to adjust the
upper display to the correct conductivity
value of the calibration solution.
4 Wait for 5 seconds for the tester to
automatically confirm the calibration
by displaying 'CO' and return to the
measurement mode.
11.1.4 Temperature Calibration
Temperature calibration need not be performed
every time, unless the temperature reading
differs from that of an accurate thermometer. If
temperature calibration is performed, Conductivity
calibration is mandatory.
1 Make sure the tester is in measuring mode. If
required, press °C/°F key to select the desired
unit of measurement for temperature (Celsius
or Fahrenheit). Dip the tester into a solution
of known temperature and allow time for the
temperature reading to stabilise.
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2 Press INC or DEC key to bring the tester to
the calibration mode. 'CAL' indicator appears
in LCD. Immediately press °C/°F key to switch
to the temperature calibration mode.
3 The upper display shows the measured
temperature reading based on the last set offset
(if any) and the lower display shows the default
(uncalibrated) temperature reading based on
factory settings. Use INC and DEC keys to
adjust the upper temperature reading to the
known temperature value of the solution.
4 Wait for 5 seconds for the tester to
automatically confirm the temperature
calibration value by displaying 'CO' and
return to the measurement mode.
11.1.5 Changing Batteries
Replace the batteries when the low
battery indicator starts blinking.
1 Open the battery compartment lid
(with attached lanyard loop).
2 Remove old batteries by pulling plastic
ribbon. Replace with fresh ones.
11.1.6 Error Codes
• Er.0 - temperature calibration is out of range.
Use solution from 0-50°C.
• Er.1 - conductivity calibration solution is outside
prescribed range. Replace standard solution.