Omega RD-MV100 Series, Руководство пользователя

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12-9
Troubleshooting
12
Does the input
meet the specifications
(signal source resistance,
etc.)?
NO
NO
NO
NO
NO
YES
YES
YES
YES
• The reading error is large.
• The digital indication or trend trace (waveform) is unstable.
• The trend trace (waveform) stays at 0 or 100%.
YES
Adjust the span and range
(See sections 5.1 to 5.7).
Change the input to meet the specifications
(See section 14.1).
Is the input wiring correct?
Are the span and
range settings correct?
Is the input free of noise?
Is the environmental
temperature kept constant
(for temperature
measurement)?
Is the input wiring parallel
with other equipment?
YES
NO
NO
YES
Is the RJC setting correct
(for TC input)?
Set correctly (See section 5.9).
Contact Omega.
• Separate the input wiring from the
noise source.
• Ground the recorder properly.
• Ground the measuring object
properly.
• Insulate the TC from the measured
object.
• Use shielded cable for input.
• Correct the A/D integration frequency
(See section 5.9).
• Use the input filter (See section 5.8).
• Use the cover for the input terminal.
• Protect the input terminal from wind
or fans.
• Keep the room temperature constant
around the input terminal.
• Wire correctly (See section 2.3).
• Fix the terminal block properly.
• Fasten the terminal screws.
• Insulate the RTD from ground.
• If burnt, replace the TC.
• Stop the TC burnout
upscale/downscale function of other
equipment.
• Ground the recorder and other
equipment at the same grounding
pole.
• Disconnect parallel wiring. (Use a
double-element TC, for instance.)
12.2 Troubleshooting Flow Chart