Hanna Instruments HI 8427 - Manual (Page 4)

7 6
working temperature. If not, adjust the
pH meter to read the correct value.
Note: The °C knob is not effective during
pH 7 calibration, since pH 7 is used
as reference.
HI 931001:
• Connect the simulator to
the pH meter using the
HI 7858/1 cable provided.
• Manually set the tempera-
ture compensation of your
meter to 25°C.
• Switch the simulator on
and select the pH mode
by pressing the RANGE
key.
• Make sure that the two additional deci-
mal points are not displayed. If they are
displayed, change the battery of the simu-
lator before performing the calibration.
• Turn the Coarse and Fine knob to set
any desired pH value and make sure that
the pH meter you are checking reflects
the correct result (e.g. 7.01 pH).
HI 931001 pH/mV
Calibrator
HI 8424 microcomputer
pHmeter
pH pH
SETTING
OFF
ON
OFF
ON
RANGE
HI 931001 pH/mV
Calibrator
HI 8424 microcomputer
pHmeter
pH pH
SETTING
OFF
ON
pH CALIBRATION
HI 8427:
• Connect the simulator to
the pH meter using the
HI 7858/1 cable provided.
• Switch the pH meter on
and select pH 7 on the
simulator. Make sure that
the LOW BATTERY LED
is not lit. If it is lit, change
the battery of the simula-
tor before performing the
calibration.
• Verify that the pH meter
displays the pH 7 mes-
sage. If not, adjust the pH
meter until the correct
reading pH 7 is displayed
(refer to the pH meter in-
struction manual).
• Select any other pH value
on the simulator and set
the °C knob to the de-
sired working temperature
(e.g. pH 4 at 30°C).
• If your pH meter has a temperature probe
connected to it, set the °C knob to the
measured temperature displayed by your
pH meter.
If your meter is manually compensated
for temperature, adjust the temperature
settings for both the pH meter and the
simulator to the same temperature.
• Verify that the pH meter displays the
correct pH value compensated at the
HI 8427 pH/mV CALIBRATOR pH
pH7
HI 8427 pH/mV CALIBRATOR pH
°C
0 10
20
30
40 50
• If not, adjust the pH meter
until the correct reading
is displayed (refer to the
pH meter instruction
manual).