User Guide

13
12
CALIBRATION
Make sure the meter is in the measurement
mode (MEASURE LED light is on) before
starting the calibration procedure.
HI 931700:
Note the temperature of the buffer
solution using a thermometer.
Immerse the electrode and the Po-
tential Matching Pin in pH 7.01 buffer
solution (HI 7007).
Note: When it is not possible to immerse
the Potential Matching Pin together with the
electrode in the solution, disable the differ-
ential input by connecting the connection for
Potential Matching Pin with the connection
for Electrode Reference with a jumper wire.
Shake briefly and
wait one minute be-
fore adjusting the
Offset trimmer to
display pH 7.01 on the LCD if the temperature
of the buffer solution is at 25°C.
If the buffer solution temperature is not 25°C,
refer to Table 1 for the appropriate buffer
value to adjust at the noted temperature.
Rinse the electrode and the Po-
tential Matching Pin thoroughly
in water and immerse them in
4.01pH (HI7004) or 10.01pH
(HI7010) buffer solution.
Shake briefly and
wait one minute be-
fore adjusting the
slope trimmer to
display pH 4.01 (or
10.01) on the LCD if the temperature of the
buffer solution is at 25°C, if not refer to Table 1
for appropriate buffer value at the correspond-
ing temperature.
pH
SET MEA
SET
ON
OFFSET
SLOPE
SET
pH
SET MEA
SET
ON
OFFSET
SLOPE
SET
OPERATIONAL GUIDE
The setting of the various parameters are
made via the front panel keys and trimmers.
When each key is pressed the LED is lighted
indicating to the user that the function is in
operation.
Make sure that the meters and electrodes are
calibrated before operating the instruments
(see page 13).
To set the working point of pH or ORP dosage,
press the "SET" key. The display will show the
set value for the dosage.
Use a small screwdriver to adjust the "SET"
trimmer until the desired set value is dis-
played.
After setting the pH or ORP
value immerse the electrode in
the test solution and press the
"MEASURE" key. The actual
pH or ORP value of the test
solution is displayed.
When the chemicals are dosed,
the "SET ON" LED will be lit.
SET MEA
SLOPE
SET
pH
SET MEA
SLOPE
SET
pH
SET MEA
SLOPE
SET
SET MEA
SET
ON
OFFSET
SLOPE
SET