Keys - ECD L20 Instruction Manual

B. Keys
On/Off
Press and hold this key for 5 seconds to power on and shut off the meter.
Once the unit is power up, press the same key to turn on or off the
backlight.
Mode
Selects display mode. Pressing this key changes the display sequentially
to display pH-AUTO, mV-AUTO, pH and mV. The calibration values will
not be affected by changing the display modes. In "pH calibration", press
"Mode" key to exit the two point calibration mode.
Clear
It is used to clear the unit when error signal appears. It clears all
calibration values stored in the internal memory.
Under normal use the key will not be activated unless pressed and held
for 2 seconds to prevent accidental erasing stored memory.
When the "Clear" key is pressed, all segments of the LCD will be on. After
about 2 seconds the unit will enter the pH-AUTO mode. The "AUTO" and
"CAL" will be on and one of the buffer values will start to flash. This
means that the unit must be calibrated.
Up/Down
Increases or decreases the displayed temperature value when in manual
mode, buttons have no effect when in ATC mode.
Stand/Slope
The "Stand" and "Slope" keys are used for dual or three point pH
calibration of the unit. Pressing and holding the Stand key while turning
on the power, will change the buffer set to the other available buffer set.
Mea. / Eff.
The key is used to bring the unit out of the AUTO condition when
operating in the pH-AUTOLOCK or mV-AUTOLOCK mode.
Press and hold this key for 5 seconds, the LCD will display the efficiency
of the electrode.
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