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Storage
Place the electrode in the storage protector
glycerine.
Troubleshooting
... the pH-meter always measures the same pH value.
Short circuit in the electrode, cable or connector.
Substitute the electrode.
... fortuitous reading.
Broken cable.
Substitute the electrode.
... impossible to perform calibration.
... very slow response.
Dirt on the diaphragm and/or the membrane.
De-hydrated membrane.
Electrode ageing or wear.
Clean, regenerate or replace the electrode.
Specifications
pH measuring range
Operating temp.
Reference element
Diaphragms
Electrolyte
Body material
Min. immersion depth
Applications
Food industry, viscous media, dirty samples, etc.
Limitations
Samples with pH < 2.
Temperatures exceeding 80 °C.
Samples with low conductivity, 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 50 51 has passed the quality test and
follows the next specifications:
• Asymmetry potential < ± 15 mV.
• Sensitivity, pH 4...7 (at 25 ˚C) > 98%.
• Response time, pH 4...7 < 20 s
2 ... 14
0 ... 80 °C
sleeved Ag wire coated with AgCl
open, circular
solid
glass
15 mm
with KCl with
11
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