Union Instruments CWD3000 EXP, Руководство по эксплуатации

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Troubleshooting
107
12.2 Changing/replacing fuses
Only skilled electricians or service technicians are permitted to replace fuses. Only
replace with fuse types specified by UNION.
12.3 Changing/replacing the battery
The battery for backup power supply of the real-time clock of the processor may
only be replaced by a professional electrician or service technician. Only replace
with battery types specified by UNION.
12.4 Unstable measured value
•
The inlet pressure controller cannot maintain a constant inlet pressure. The
process pressure (blast furnace gas) is too high. A pressure booster pump
must be installed.
•
Direct sunlight is causing rapid temperature changes.
Direct sunlight must be prevented.
•
Changes in temperature which are too rapid (less than 5°C/h) caused by
environmental influences.
•
The inlet pressure is inexact/cannot be maintained. Check whether the input
pressure is too high.
12.5 Drift of measured value
The measured value drifts upward in one direction:
•
The calibration no longer achieves the required point. The frequency
controller is at its maximum value.
•
Strong compressed air supply fluctuation which can no longer be corrected.
The measured value drifts downward:
• The heat exchanger is contaminated with soot (when propane or butane is
combusted with too little air).
• The heat exchanger must be cleaned (hot water) and then dried with
compressed air.
• The thermoelectric battery is contaminated. The thermoelectric battery
must be cleaned and carefully dried.
12.5.1 Faulty ignition
The combustion calorimeter is continually igniting, and the flame is burning.
Combustion calorimeter does not switch to the operating state.
•
Incorrect temperature setting (too high). The temperature threshold must
be reduced.
The combustion calorimeter switches to the operating state even though the flame
is not burning and then reverts to the ignition state.
• Incorrect temperature setting (too low). The temperature threshold must be
increased.
Ignition electrodes are corroded, natural wear when ignition is frequent.
• Replace ignition electrode.