BOQU pHG-2091 Benutzerhandbuch - Seite 18

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BOQU pHG-2091 Benutzerhandbuch
SHANGHAI BOQU INSTRUMENT COMPANY

Chapter 8 Trouble analysis and recovery methods

1. The controller no display?
A: Check whether the power wiring is connected, the power supply is on.
2. Measurement value is bouncing?
A: Check around the frequency converter and other interference equipment, pay attention to
stay away from these interference equipment or do shielding measures.
3. PH instrument can not be calibrated?
A: The standard solution is not properly formulated or the electrode is damaged.
4. After calibrated by standard solution PH4.00, PH6.86, PH9.18, the test is not test?
A: The standard solution may polluted, replace the standard liquid and re-calibration.
5. The measurement value is slow response?
A: The electrode bulb is covered with dirt, the reaction will slow down, according to the type of
pollutants according to the corresponding cleaning method, it's normal phenomenon in winter.
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