4
KEY FUNCTIONS OF THE MODEL EC300A
1.
: Turns the unit ON or OFF. Calibration values are not erased when the unit is turned
off. When the unit is not in use, turn it off to save battery life. The instrument has a 30
minute auto shut off feature when not in use. For long-term storage, remove the battery.
2.
MODE: Selects display mode. In Normal operation, press MODE to switch the display
between uncompensated conductivity, temperature compensated conductivity, salinity,
total dissolved solids (TDS), Recall and Delete.In calibration mode, this key exits the
current calibration and displays the next calibration parameter.
3.
CAL: In normal operation, changes the mode from Normal to Calibration.
4.
(Enter) : In Calibration Set-up, press this key to save the current parameter to
memory.
5.
and
Keys: Increases or decreases the display value as desired.
THE LCD DISPLAY
1.
CONDUCTIVITY: Displays when
measuring conductivity.
2.
BAT: Low battery indicator.
3.
CELL: Indicates conductivity cell
constant value.
4.
Main display for compensated and
uncompensated conductivity, salinity
and TDS values.
5.
TDS: Displays when measuring total
dissolved solids.
6.
SALINITY: Displays when measuring
salinity.
7.
CAL: Calibration mode indicator.
8.
C: Flashes during temperature compensated conductivity measurement. During
calibration, indicates temperature reference unit.
%:
Displays during calibration; indicates temperature coefficient unit.
9.
ppt:
Parts per thousand; indicates salinity measurement.
10. uS, mS: micro Siemens, milli Siemens; Indicates conductivity measurement.
11. g/L: grams/Liter; indicates TDS measurement.
12.
C: Temperature display.
MEASUREMENT MODES
1.
Temperature - Current solution temperature continually displays.
2.
Temperature Compensated Conductivity - Measurement of conductivity, compensated
to 25
C or another specified value between 15 and 25
C. Expressed as uS/cm or
mS/cm with a flashing “
C”.
3.
Uncompensated Conductivity – Direct measurement of conductivity, not compensated
to a specific temperature. Expressed as uS/cm or mS/cm.
4.
Salinity – Measurement of salinity; expressed in parts per thousand (ppt).
Figure 1. LCD Display
