13
HI 8424NEW
has been accurately precalibrated for temperature at the factory.
For optimum accuracy, it is recommended to recalibrate the meter for tempera-
ture at least once a year.
Contact your dealer or the nearest HANNA instruments
®
Customer Service
Center for more information.
HI 8424NEW
has been accurately precalibrated for mV range at the factory.
For optimum accuracy, it is recommended to recalibrate the meter for mV
readings at least once a year.
Contact your dealer or the nearest HANNA instruments
®
Customer Service
Center for more information.
m
m
m
m
mV CALIBRATION
V CALIBRATION
V CALIBRATION
V CALIBRATION
V CALIBRATION
TEMPERATURE CALIBRATION
TEMPERATURE CALIBRATION
TEMPERATURE CALIBRATION
TEMPERATURE CALIBRATION
TEMPERATURE CALIBRATION
16
TROUBLESHOOTING
Symptom
Problem
Solution
Slow reponse or
Dirty pH electrode
Soak the electrode tip
excessive drift
in
HI 7061
solution for
30 minutes
Reading fluctuates
Clogged/dirty junction
Soak the electrode tip
up and down (noise)
or low electrolyte level
in warm
HI 7082
(refillable electrodes)
solution for one hour,
then rinse it with
distilled water
(refill with fresh
electrolyte if necessary)
Blinking full scale
Reading is out of range
value
Blinking "°C" (or "°F")
Temperature probe is not connected or broken
"WRONG" &
Calibration error
Check buffer solution or
blinking dashes
replace pH electrode
Blinking battery
Low battery level
Recharge or
symbol
replace battery
Meter shuts off
Auto-off enabled or
dead battery
Replace battery
"Clr" message
Loaded default
Perform pH calibration
pH calibration values
"Er1" and Er2"
EPROM error
Contact your dealer or
messages
HANNA Service Center
Note:
For field applications, it is always recommended to keep a conditioned spare elec-
trode handy. When anomalies cannot be resolved with simple maintenance, change
the electrode and recalibrate the meter.