4) Auto. Power off (P04) ─ The auto. power off time can be set to 10 to 20 minutes. For example, if 15 minutes is
set, the meter will automatically shut down after 15 minutes if no operation; when “Off” is set, the auto. power off
function will be turned off. Long press to manually shut down the meter.
5) pH Calibration Reminder (P07) – set X hours (H) Or X days (D) in ZenTest mobile app – settings – Parameter –
pH – Calibration Reminder. On the meter, you can only check the values that’s been set up on ZenTest App. For
example, if 3 days is set up, the Er6 icon (see Figure-4) will appear in the lower right corner of the LCD screen in 3
days to remind you to perform calibration, also in the ZenTest App there will be a pop-up reminder. After calibration
is finished or the reminder setting is cancelled in the ZenTest App, the Er6 icon will disappear.
6) pH Back to Factory Default (P08) – Select “Yes” to recover instrument calibration to theoretical value. This
function can be used when instrument does not work well in calibration or measurement. Calibrate and measure
again after setting the instrument back to factory default.
Technic al Spec if icati ons
Er1, Er2, Er3, Er4,Er5, Er6