13
3.5
Temperature Calibration
The temperature sensor is factory calibrated. Calibrate the
temperature probe only if you suspect temperature errors that
may have occurred over a long period of time or if you have a
replacement probe.
Temperature Calibration
1.
Make sure the ATC probe (or temperature connector of the
electrode) is attached to the 6-pin connector. The ATC
annunciator will appear at the right-hand side of the LCD.
2. Switch the meter on. Press the MODE key to select pH
mode.
3. Press the CAL/MEAS key to enter pH calibration mode.
The CAL indicator will appear above the primary display.
4.
While in pH calibration mode, press the MODE key to enter
temperature calibration mode. The primary display shows
the temperature reading with last set offset and the
secondary display shows the factory default temperature
value.
5.
Dip the ATC probe (or electrode) into a solution of known
temperature (i.e. a temperature bath). Allow time for the
temperature probe to stabilize.
6. Scroll with the MI/
▲
or MR/
▼
keys to set the correct
temperature value (i.e. the temperature of the temperature
bath). You can adjust the reading in increments of 0.1
°
C.
7.
Once you have selected the correct temperature, press the
ENTER key. The meter automatically returns to pH
measurement mode. See Figure 12.
NOTES:
•
You can offset the temperature reading up to
±
5
°
C from
original reading.
•
To exit this program without confirming the temperature
calibration value, DO NOT press ENTER. Press
CAL/MEAS instead.
Figure 12 - Temperature
calibration
