Hanna-instruments HI8424 Bedienungsanleitung PDF herunterladen (Seite 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.

V CALIBRATIONV CALIBRATION

V CALIBRATION

TEMPERATURE CALIBRATIONTEMPERATURE CALIBRATION

TEMPERATURE CALIBRATION

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 Replace battery

symbol

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.

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