Eaton Crouse-Hinds MTL Z1920C Instruction Manual
Also see for Crouse-hinds series: Operating instructionsInstruction manualOperating instructionsOperating instructionsInstruction manual
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INM MTL 130-0175 Rev 495 MAINTENANCENOTEThe internals of the sensor unit operate at elevated temperatures. Take great care whenworking on an analyser that has power applied or has only recently been turned off.5.1 General5.1.1 ElectronicsThe electronics unit is virtually maintenance free. Faults in modern electronics equipmentnormally show up in the first six months of continuous operation. Tests show that following thisperiod, the life is virtually infinite, (10 years or more) assuming that the instrument has not beensubjected to use beyond its specification.All the electronic modules require specialist test equipment and any adjustments, other thanthose available on the front panel should be avoided.5.1.2 Sensor UnitFollowing commissioning it is advisable to check the calibration as described in section 4.3after one week of continuous operation. Following this check, monthly checks should beadequate. When carrying out the calibration check, it is useful to observe the response rateof the SENSOR. With the air off or the sample valve shut the response to the calibration gas,assuming the line is purged up to the inlet connector, should be virtually instantaneous. Thereading of sample oxygen should be fully stabilised in 5 to 10 seconds.If it is suspected that the SENSOR is faulty a check on its electrical resistance is a goodindication of failure. See section 6.15.1.3 Catalytic Combustion UnitProvided that no samples containing significant levels of sulphur, phosphorus, heavy metals,silicon or halogen compounds, have been through the analyser, the catalyst should lastindefinitely. Running the system for long periods with fuel rich mixtures should also be avoided. |
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