17
OPERATIONAL MATRIX
Function/
Resulting Action
Power
Mode
Key Press Sequence
On/Off
On or Off
Any
Momentary press of ON/OFF
button
Calibration
On
pH or Con
Press & hold CAL button for 2
seconds until CAL is displayed
Store Reading
On
Any
Momentary press of MODE
button
Hold Release
On
Hold
Momentary press of MODE
button
Enter Memory
Retrieval
On
Any Measurement
Mode
Momentary press of CAL
button followed by a
momentary press of MODE
button within 4 seconds.
Scroll Stored
Readings
On
Memory Recall
Momentary press of MODE
button. Displays last in first
out.
Exit Memory
Retrieval
On
Memory Recall
Momentary press of CAL
button
Clear Stored
Memory
On
Any Memory Mode
Press and hold the ON/OFF
button for 4 seconds until “clr”
is displayed.
Change
Measurement
Mode
On
Any
Press and hold the MODE
button for at least 2 seconds
Modes will scroll by until
button is released
Enter CON/TDS
Ratio
On
TDS (ppm or mg/L)
Press and release the CAL
button twice in succession
Change CON/TDS
Ratio
On
TDS (ppm or mg/L)
Momentary press of MODE
button. Each press increases
ratio by 0.1 from 0.4 to 1.0.
Exit CON/TDS
Ratio
On
TDS (ppm or mg/L)
Momentary press of CAL
button.
Change
Temperature
Units
Off
Off
Press and hold CAL button
then momentarily press ON/
OFF button. Release CAL
button after “Self Cal” is
displayed.
