14
Temperature Calibration
The built-in temperature sensor included
in the probe is factory calibrated. Calibrate
your sensor only if you suspect tempera-
ture errors that may have occurred over a
long period of time or if you have a
replacement probe.
1.
Turn the meter on. Press MODE to
select pH Measurement mode.
2.
Press the CAL/MEAS key to enter pH
calibration mode.
The CAL indicator
will appear above the primary display.
See figure
3.
While in pH calibration mode, press
the MODE key to enter temperature
calibration mode.
The primary display
shows the temperature reading with
zero offset and the secondary display
shows you what the temperature value
was initially.
See figure
4.5
ATC
CAL
Temp
C
B
A
B
pH
ATC
CAL
pH
pH
A
4.
Compare the primary display reading
to a NIST-traceable thermometer or
another thermometer known to be
accurate.
5.
Press the
▲
or
▼
keys
to adjust
the primary display reading to agree
with your temperature standard.
See figure
6.
Press the ENTER key
to confirm tem-
perature calibration. The CON indicator
will flash to confirm calibration.
See figure
Notes
To exit from Temperature Calibration mode
without confirming calibration,
DO NOT
press ENTER in step 6. Press CAL/MEAS
instead.
Temperature calibration is restricted to
±5°C from the factory default value
displayed during calibration
(shown in
the secondary display).
15
ATC
CAL
Temp
C
C
ATC
CAL
Temp
CON
C
D
D
C
