Yokogawa Button Operated DX2000 - Manual (Page 314)

11-21
IM 04L42B01-01E
Troubleshooting
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App
Index
Does the input meet
the specifications? NO
NO
NO
NO
NO
YES
YES
YES
YES
• The error is large.
• The trend or digital values fluctuate.
• The trend is off the scale on either the 0% or 100% side.
YES
Change the input to meet the
specifications.
Is the input wiring correct?
• Attach the input terminal cover properly.
• Protect the input terminal from wind or
fans.
• Keep the temperature fluctuation near
the input terminal to a minimum.
• Adjust the span and range (section 3.3).
• If you use Calibration Correction (/CC1
option), check the set values for
correction points (section 3.9).
Is the range/span
setting appropriate?
Taking measures
against noise?
Is the environmental
temperature kept constant
(TC input)?
• Separate the input wiring from the
noise source.
• Ground the recorder.
• Ground the measured object properly.
• Insulate the TC from the measured object.
• Use shielded cables for input.
• Change the integral time of the input
A/D converter (section 3.1).
• Use moving average on the input
(section 3.4).
• Wire correctly (O.G.).
• Install the terminal block correctly.
• Fasten the terminal screws correctly.
• Insulate the RTD from the ground.
• If burnt, replace the TC.
Is the input wiring parallel
with other equipment?
YES
NO
NO
YES
Is the RJC setting correct
(TC input)?
• Stop the TC burnout upscale/downscale
function of other equipment.
• Ground the DX and other equipment
at one point.
• Disconnect parallel wiring
(use a double-element TC, for instance).
Set it correctly.
Contact your nearest YOKOGAWA
dealer.
Section 3.2
Section 12.1
O.G.: Operation Guide
11.2 Troubleshooting