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accuracy of measurements is in question.
1.
Turn off the meter.
2.
Press and hold the CAL and MODE buttons.
3.
Momentarily press the ON/OFF button, as soon as they display comes on,
release all 3 buttons.
4.
The display will show "dFLt rSt" (default restart) and all of the calibration data
will be erased. If "dFLt rSt" does not appear, retyr the procedure.
5.
Proceed to the calibration routine for pH and Conductivity.
OPERATIONAL MATRIX
Function/
Resulting
Action
Power
On/Off
On or Off Any
Calibration
On
Store Reading On
Hold Release
On
Enter Memory
On
Retrieval
Scroll Stored
On
Readings
Exit Memory
On
Retrieval
Clear Stored
On
Memory
Change
On
Measurement
Mode
Enter CON/TDS
On
Ratio
Change CON/
On
TDS Ratio
Exit CON/TDS
On
Ratio
Change
Off
Temperature
Units
Mode
pH or Con
Any
Hold
Any
Measurement
Mode
Memory Recall Momentary press of MODE button.
Memory Recall Momentary press of CAL button
Any Memory
Mode
Any
TDS (ppm or
mg/L)
TDS (ppm or
mg/L)
TDS (ppm or
mg/L)
Off
11
Key Press Sequence
Momentary press of ON/OFF button
Press & hold CAL button for 2 seconds
until CAL is displayed
Momentary press of MODE button
Momentary press of MODE button
Momentary press of CAL button
followed by a momentary press of
MODE button within 4 seconds.
Displays last in first out.
Press and hold the ON/OFF button for 4
seconds until "clr" is displayed.
Press and hold the MODE button for
at least 2 seconds Modes will scroll by
until button is released
Press and release the CAL button twice
in succession
Momentary press of MODE button.
Each press increases ratio by 0.1 from
0.4 to 1.0.
Momentary press of CAL button.
Press and hold CAL button then
momentarily press ON/OFF button.
Release CAL button after "Self Cal" is
displayed.
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