Troubleshooting Guide; Electrode Conditioning And Maintenance - Hanna Instruments HI 9023C Instruction Manual

T R O U B L E S H O O T I N G G U I D E T R O U B L E S H O O T I N G G U I D E T R O U B L E S H O O T I N G G U I D E
T R O U B L E S H O O T I N G G U I D E T R O U B L E S H O O T I N G G U I D E
Symptoms Problem
The meter is slow in re- The electrode is not
sponding or gives faulty working or the reference
readings junction is clogged
The meter does not ac- Out of order pH elec-
cept the 2 nd buffer trode
solution for calibration
The reading drifts Out of order electrode
Display shows: "E1" or Out of range pH scale
Display shows: "E2" or Out of range tempera-
ture scale
Display shows: "E3" or Out of range mV scale
Display shows: "E4" or Erroneous buffer solution
"WRONG 1 " used for offset calibra-
BUF
tion
and/or
"WRONG "
Out of order electrode
Erroneous buffer solution
Display shows: "E5" or
used for slope calibra-
"WRONG "
BUF
2
tion
and/or
"WRONG "
Out of order electrode
The meter does not
Out of order temperature
work with the tempera-
probe
ture probe
The meter fails to cali-
Out of order pH elec-
brate or gives faulty
trode
readings
Display acts erratically
The microprocessor has
been electronically dis-
turbed
25
Solution
Leave the electrode in a stor-
age solution after cleaning
the junction. If problem per-
sists, replace the electrode
Follow the cleaning proce-
dure. If this doesn't work
replace the electrode
Replace the pH electrode
a) Recalibrate
b) Make sure the pH
sample is in the 0 to 14
range
c) Check the electrolyte level
and the general state of
the pH electrode
Make sure the temperature
is in the 0 to 100 C (or 70
C) range and the probe is
plugged in
Electrode not connected
Make sure the buffer setting
is correct and the solution is
fresh. Replace the buffer if
necessary
Replace the pH electrode
Make sure the buffer setting
is correct and the solution is
fresh. Replace the buffer if
necessary
Replace the pH electrode
Replace the probe
Replace the electrode
Remove one of the batter-
ies for one minute to reset
the microprocessor
ELECTRODE CONDITIONING ELECTRODE CONDITIONING
ELECTRODE CONDITIONING ELECTRODE CONDITIONING ELECTRODE CONDITIONING
& MAINTENANCE & MAINTENANCE & MAINTENANCE & MAINTENANCE & MAINTENANCE
* Not present in gel electrodes.
PREPARATION
Remove the protective cap.
DO NOT BE ALARMED IF ANY SALT DEPOSITS ARE PRESENT. This is
normal with electrodes and they will disappear when rinsed with water.
During transport tiny bubbles of air may form inside the glass bulb
affecting proper functioning of the electrode. These bubbles can be
removed by "shaking down" the electrode as you would do with a
glass thermometer.
If the bulb and/or junction is dry, soak the electrode in HI 70300 or
HI 80300 Storage Solution for at least one hour.
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