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Yokogawa Button Operated MV2000 User Manual

Page 257

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12-18

M-4660

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 Omega
dealer to have your MV serviced.

Section 3.2

Section 13.1

12.2 Troubleshooting

This manual is related to the following products: