Hach Pocket Pro User Manual page 7

Figure 6 Keypad overview - Pocket Pro+
1 Power/Backlight key
Key Description
Push and hold to set the power to on or off.
Push and hold to set the power to on or off.
Push to set the backlight to on or off. After 1 minute of no activity, the backlight switches 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
Calibrate
2 Calibration/Settings key
Table 2 Key functions
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.
Item to collect: One calibration standard or sample of known ORP value
1. Set the power to on.
2. Remove the cap from the sensor.
3. Push to go to calibration mode.
"CUS" shows on the bottom line.
4. Rinse the sensor and cap with deionized water and blot dry.
5. Pour the calibration standard or sample into the cap to the fill line.
3 Lock key
C A U T I O N
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