LaMotte pH Waterproof Testr 1 Meter - Manual (Page 3)

Calibration
Calibration should be done regularly, typically every day that the Testr is used.
3
W
ATERPROOF
pH
T
est
r
1
ON OFF
CAL
HOL
D
CON
1. 2.
3. 4.
5.
Turn the Testr on
by pressing the
ON/OFF button.
buffer if testing
alkaline (or basic)
solutions. If testing
solutions close to
7.0, use the 7.0
buffer for
calibration.
1/2"
to 1"
Press the CAL button
to enter the Calibrate
(CA) mode.
The display will
flash "CA" and
then a pH value
close to the buffer
value will flash
repeatedly.
After about 30 seconds,
press the HOLD/CON
button to confirm the
calibration.
"CON" will
appear on the
display. It will
then switch back
to a pH reading of
the buffer.
Rinse the
electrode with
deionized water
or tap water.
ON OFF
CAL
HOL
D
CON
W
ATERPROOF
pH
T
est
r
1
W
ATERPROOF
pH
T
est
r
1
ON OFF
CAL
HOL
D
CON
W
ATERPROOF
pH
T
est
r
1
ON OFF
CAL
HOL
D
CON
30
W
ATERPROOF pH
T
est
r
1
ON OFF
CAL
HOL
D
CON
Dip 1/2" to 1" of the
electrode into a pH 7.0
buffer for general purpose
use, into a pH 4.0 buffer
solution if testing acidic
solutions, or a pH 10.0
No further calibration is needed if
all measurements are expected to
be between pH 6 and pH 8 for
general purpose use. Perform the
calibration using pH 4.0 buffer if
readings below pH 6 are expected.
Perform the calibration using pH
10.0 buffer if readings above pH 8
are expected.