Hanna Instruments HI 8427 - Manual (Page 5)

9 8
• Make sure that the the two additional
decimal points are not displayed. If they
are displayed, change the battery of the
simulator before performing the calibra-
tion.
• Turn the Coarse or Fine knob to any
desired value and make sure that the mV
meter you are checking reflects the cor-
rect result.
HI 931001 pH/mV
Calibrator
HI 8424 microcomputer
pHmeter
mV mV
SETTING
OFF
ON
mV (ORP) CALIBRATION
HI 8427:
• Connect the simulator to
the mV (ORP) meter us-
ing the HI 7858/1 cable
provided.
• Switch the mV meter on
and select the desired mV
value on the simulator.
Make sure that the LOW
BATTERY LED is not lit.
If it is lit, change the bat-
tery of the simulator be-
fore performing the cali-
bration.
• If the meter is not displaying the correct
mV value, adjust the meter until it dis-
plays the correct mV (refer to the mV
meter instructions manual).
Note: The °C knob is not effective during
mV calibration.
HI 931001:
• Connect the simulator to
the mV (ORP) meter us-
ing the HI 7858/1 cable
provided.
• Switch the simulator on
and select the mV mode
by pressing the RANGE
key.
HI 8427 pH/mV CALIBRATOR pH
-350
mV
HI 931001 pH/mV
Calibrator
HI 8424 microcomputer
pHmeter
pH pH
SETTING
OFF
ON
OFF
ON
RANGE
• If not, adjust the mV meter
until the correct reading
is displayed (refer to the
mV meter instruction
manual).
Note: Temperature compensation does not
apply here.