Table 2 Key functions
Key
Description
Push and hold to set the power to on or off.
Push to start a calibration. To exit a calibration, push and hold.
Push and hold until "SEt" shows on the display to go to the settings menu. To exit the settings menu, push and hold
until "End" shows on the display. When in the settings menu, push to scroll through the settings.
Note: Power cannot be set to off while in settings or calibration mode.
Push to set the lock feature to on or off. When the lock feature is on, the lock icon shows and the parameter value on
the display does not change.
Calibration
C A U T I O N
Chemical exposure hazard. Obey laboratory safety procedures and wear all of the
personal protective equipment appropriate to the chemicals that are handled. Refer to the
current safety data sheets (MSDS/SDS) for safety protocols.
Calibrate the tester before initial use and when:
•
Results drift
•
Results are not accurate
Before the initial calibration and after a dry storage, soak the sensor for several minutes
in the sample or tap water.
Calibrate
Items to collect:
One auto-recognition calibration standard
1.
Set the power to on.
2.
Remove the cap from the sensor.
3.
Push to go to calibration mode.
The auto-recognition standard(s) the tester expects to measure shows on the bottom
line.
4.
Rinse the sensor and cap with deionized water and blot dry.
5.
Pour the calibration standard shown into the cap to the fill line.
6.
Put the sensor fully into the cap.
7.
When the measurement is stable, push to save the calibration and go to
continuous measurement mode. The measured value will flash 3 times and then stop.
Then, "END" shows on the display.
8.
Rinse the sensor and cap with deionized water and blot dry.
Measurement
Note: Air bubbles under the probe tip when submerged can cause slow stabilization or error in
measurement. Shake the tester from side to side to remove air bubbles.
1.
Set the power to on.
2.
Remove the cap from the sensor.
3.
If the lock icon shows on the display, push to go to continuous measurement mode.
4.
Rinse the sensor and cap with deionized water and blot dry.
5.
Pour the water sample into the cap to the fill line.
6.
Put the sensor fully into the cap. The measured value shows on the top line.
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