Hach 52 12 Manual Del Usuario página 11

Storage
The connector should be protected from
humidity by the protective cap
Place the electrode in the storage protec-
tor with KCl 3M sat. AgCl.
Troubleshooting
... the pH-meter always measures the
same pH value.
Short circuit in the electrode or connector.
Substitute the electrode.
... unstable reading.
Air bubble in the membrane.
Shake the electrode as a thermometer.
... impossible to perform calibration.
... very slow response.
Dirt on the diaphragm or the membrane.
De-hydrated membrane.
Electrode ageing or wear.
Clean, regenerate or substitute the elec-
trode.
Specifications
Measuring range
Operating temp.
Reference element sleeved Ag wire coa-
Diaphragms
Electrolyte
Body material
Min. immersion
depth
Applications:
• Measurements in "difficult" samples,
creams, dirty or viscous samples, etc.
• Measurements at high temperature.
• Distilled water.
Warranty
HACH guarantees this electrode against
manufacturing defects.
Validity: 6 months from shipment date.
Limitations:
• Accidental damage.
• Inadequate applications.
• Non-fulfilment of the recommendations.
• Normal wear and tear of the electrode.
QUALITY CERTIFICATE
The attached electrode 52 12 has passed
the quality test and follows the next speci-
fications:
• Asymmetry potential < ± 15 mV.
• Sensitivity, pH 4...7 (at 25 ˚C) > 98%.
• Response time, pH 4...7 < 20 s
0... 14
0... 100 °C
ted with AgCl
ring of porous PTFE
gel
glass
12 mm
GB
.
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