6
B. Keys
ON/OFF-
Powers on and shuts off the meter.
MODE-
Selects display mode. In normal operation, press this
key to sequentially display pH, ORP, uncompensated
conductivity, compensated conductivity, TDS,
salinity, Recall and Erasing interface.
In calibration mode, press this key to exit the current
calibration parameter and enter into the next one.
In “rcl” and “ErAS” modes, press this key to exit “rcl”
and “ErAS” modes respectively.
UP/DOWN-
Increases or decreases the display value as desired.
In “rcl” mode, view saved data and data storage site
number by pressing these keys.
CAL-
In “Measurement” mode, press this key to enter into
“Calibration” mode.
In pH mode, press this key can enter the pH
calibration.
In conductivity or salinity or TDS mode, press this
key can change TDS
，
conductivity constant
，
temperature coefficient, reference temperature,
compensated conductivity.
ENTER-
In “Calibration” mode, press this key one time to save
the current value to memory.
In “Measurement” mode, press this key 5 seconds to
save reading into the next available data storage site.
In “rcl” mode, press this key to display the last set of
saved data.
In “ErAS” mode, press this key to erase all data.