Hach-Lange 5330 User Manual
Page 5
Measuring range
0 to 14 pH
Operating temp.
0 to 100 °C
Max. pressure
5 bar
Reference element
cartridge
Diaphragm
ring of porous PTFE
Electrolyte
gel
Body material
glass
Thread
PG 13,5
Connector
S8
Min. immersion
depth
12 mm
5
GB
... impossible to perform calibration.
... very slow response.
Dirt on the diaphragm or the mem-
brane.
De-hydrated membrane.
Electrode ageing or wear.
Clean, regenerate, replace the elec-
trode.
Storage
The connector should be protected from
humidity by the protective cap
.
Place the electrode in the storage protector
with KCl 3M.
Life of an electrode
The average life expectancy of a pH process
electrode oscillates between 6 or 12 months,
depending on the working conditions.
Electrodes exposed to high temperatures do
not last as long. Very alkaline mediums also
reduces the life span of electrodes.
If an electrode has too short life span,
less than three months, ask us about it.
Probably there is a more suitable elec-
trode for the application.
Specifications
Applications
Waste water, galvanising industry, osmosis
processes, demineralized water, dirty or
viscous samples , etc.
CERTIFICATE OF QUALITY
The attached electrode 53 30 has passed
the quality test and follows the next speci-
fications:
• Asymmetry potential < ± 15 mV.
• Sensitivity, pH 4 to 7 (at 25 ˚C) > 98%.
• Response time, pH 4 to 7 < 20 s.
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