5. Electrode Efficiency Mode.
In MEASURE mode, press
the “Enter” key for about 5
seconds to display the
electrode’s efficiencies.
B. Keypad Operations
Key
Operation
Mode
Duration
Function
On/Off
All
0 seconds
Turns meter on/off.
Measure
0 seconds
Enters Calibration Mode.
Measure 5
seconds
Enters Buffer Select
Mode.
Cal
Calibration
0 seconds
Recalibrates the buffer.
Measure
0 seconds
Holds measured values.
Press again to resume
measuring.
Hold
Calibration
0 second
Exits pH calibration.
Measure
5 seconds
Displays the electrode’s
efficiencies.
Enter
Calibration
0 seconds
Saves the calibration
data.
USING VISIONPLUS pH 619
A. Power ON/OFF
Press the “On/Off ” key to turn the unit on. If the unit is running
then you can press the ”On/Off “ key to turn the unit off. The
will automatically turn off after 30 minutes of no key activity.
B. Select Buffer
1. Make sure unit is in MEASURE mode.
2. Press the “CAL” key for 5 Seconds. The unit will display
7.00 to indicate you successfully changed from
“6.86/4.00/9.18” set to “7.00/4.01/10.01” set.
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