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1. The key is used to bring the unit out of the
AUTOLOCK condition when operating in the
pH-AUTOLOCK, mV (RmV) - AUTOLOCK or
ion-AUTOLOCK mode.
2. In the pH or ion measure mode, press and hold
this key for 5 seconds, the LCD will display the
efficiency of the electrode and the offset value.
3. In the ORP measure mode, press and hold this
key for 5 seconds, the LCD will display the offset
value of the electrode.
OPERATIONAL PROCEDURES
A. pH Buffer Set Selection
The 6179 meter has two buffer sets: 1.68, 7.00, 4.01, 10.01,
12.46 pH and 1.68, 6.86, 4.00, 9.18, 12.46 pH.
In pH mode, press
“Set”
to enter the buffer set selection mode.
Use
“Up”
or
“Down”
to select the preferred buffer set. Press
“Slope/Enter”
to save the selected buffer set.
[
Note:
There is no need to repeat this procedure every time the
unit is power up unless one decides to change the buffer
settings.]
B. pH Calibration
The 6179 uses up to 5 point calibration.
[
Note:
If the device is required to perform more than one
calibration points, the first calibration point must be 6.86/7.00
pH.]
a. Calibration with an ATC/Temp probe in the pH-AUTOLOCK
mode.
1.
Turn the unit on. In pH-AUTOLOCK mode, press
“Set”
to
enter the buffer set selection mode. Use the
“Up”
or
“Down”
to select the preferred buffer set. Press
“Slope/Enter”
to
save the selected buffer set and enter into the hold/clear
selection screen. Use
“Up”
or
“Down”
to select “CLr”. Press
“Slope/Enter”
. The meter will clear all previously stored
calibration values and is now ready for fresh calibration.
2.
Connect the pH electrode to the BNC connector and the
ATC/Temp probe to the ATC/Temp connector of the meter.
The “ATC” icon will lit up. The “pH” and “AUTO” icons will also
lit up. The "CAL" icon begins to flash. The meter is now ready
