Electro-Chemical Devices (ECD) L20 - Manual (Page 5)

Display and Key Functions
A. Display
Figure 2
1. WAIT
This will be displayed when the
unit is still waiting for a stable
reading or end point sensing.
7. AUTO-
Auto Lock mode indicator.
2. BAT-
Low Battery Indicator
8. Buffer Selection
This indicator will flash if the
unit is not yet calibrated. This
indicator will remain lit-up if the
unit has been calibrated.
3. pH
Unit and mode indicators
9. LOCK
This will indicate that the reading i
during AUTOLOCK mode.
4. mV
Unit and mode indicators.
10. EFF -
This will be displayed if the user is
viewing the efficiency of the
electrode. It is recommended to
use a new electrode when the
efficiency value is less than 75%.
5. ATC/MAN
ATC indicator will be displayed
if a temperature probe is
connected otherwise the MAN
indicator will be displayed.
11. Main display
For pH, mV
and probe efficiency values
6. CAL
This will be displayed when
the unit enters into the
calibration mode
12. Secondary Display
Temperature and unit display
5