Yokogawa Button Operated MV2000 - Manual (Page 263)

12-18
IM MV1000-01E
Does the input meet
the specifications?
NO
NO
NO
NO
NO
YES
YES
YES
YES
• Large measurement errors.
• Trend or digital wave value fluctuation.
• Trend going off the scale beyond either 0% or 100%.
YES
• Adjust the span and range settings
(section 3.3).
• If you use input calibration (/CC1 option),
check the set values for correction points
(section 3.9).
Change the input to meet the specifications.
Is the input wiring correct?
• Attach the input terminal cover correctly.
• Protect the input terminal from fans
and other sources of wind.
• Keep the temperature fluctuation near
the input terminal to a minimum.
Are the range/span
settings appropriate?
Are you taking measures
against noise?
Are you keeping the
environmental temperature
constant (TC input)?
• Separate the input wiring from the
noise source.
• Ground the recorder.
• Ground the measured object.
• Insulate the TC from the measured object.
• Use shielded cables for input.
• Change the integration time of the input
A/D converter (section 3.1).
• Use the moving average of the input
(section 3.4).
• Wire correctly (Section 2.3)
• 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? NO
NO
YES
YES
Is the RJC setting correct
(TC input)?
• Stop the TC burnout upscale/downscale
function of other equipment.
• Ground the MV and other equipment
at one point.
• Disconnect parallel wiring
(use a double-element TC, for instance).
Configure correctly.
Contact your nearest YOKOGAWA
dealer to have your MV serviced.
Section 3.2
Section 13.1
12.2 Troubleshootng