3
5. CONDUCTIVITY/RESISTIVITY mode indicator
6. CONDUCTIVITY/RESISTIVITY unit indicator
7. CONDUCTIVITY/ RESISTIVITY reading
8. TEMPERATURE reading
9. TEMPERATURE unit indicator
OPERATION MODES AND KEYPAD OPERATIONS
A. Operation Modes
VisionPlus EC331 meter has 3 operation modes:
1. Measure Mode. Measure Mode is used to make all
conductivity or resistivity and temperature measurements.
2. Calibration Mode. Calibration Mode is used to perform one
point calibration.
3. Hold Mode. Hold Mode is used to display the locked
reading for increased ease of use.
B. Keypad Operations
Key
Operation
Mode
Duration Function
Hold
Measure
0 second
Holds current
measurement reading.
Press again to resume
measuring.
Hold
0 second Returns to Measure Mode.
Measure
5 second . Erases all stored data.
Cal
Measure
0 second Enters Calibration Mode.
On/Off
All
0 second Turns meter on/off.
Mode
Measure
0 second
Selects display mode:
Conductivity (
℃
),
Conductivity (
℉
),
Resistivity(
℃
) and
Resistivity(
℉
).
