Yokogawa Standalone MW100 - Manual (Page 203)

4-11 IM MW100-01E
Troubleshooting and Maintenance
1
2
3
4
5
App
Index
The measured value is not correct
Possible Problem
Corrective Action Ref. section
The input wiring is not correct. Check the input wiring. 2.4
The measured value is at +Over or –Over. Change to an appropriate setting. 3.5
The measurement range setting and input
range do not match.
The temperature error is large or is unstable. Change to the correct setting. 3.5
The TC type setting and the type actually
connected are different.
The temperature error is large or is unstable. Change to the correct setting. 3.5
The RJC setting is not correct.
The temperature error is large or is unstable. Block the wind from hitting the terminals. -
The wind is hitting the terminals.
The temperature error is large or is unstable. Suppress changes in the ambient temperature such as -
The ambient temperature change is drastic. by inserting it into a box.
The temperature error is large or is unstable. Match the thickness and length of the three 2.4
There is an error in the wiring resistance measurement cables.
(in the case of a 3-wire RTD).
The measurement error is large or is unstable. Take measures against noise. 2.9
Noise effects.
The measurement error is large or is unstable. Reduce the signal source resistance such as by -
Effects from the signal source resistance. inserting a converter.
The temperature error is large or is unstable. Stop parallel connections. -
Effects from parallel connections. Do not use the burnout setting.
Measured value from strain gauge type sensor When using a sensor without a remote sensing wire, -
not correct. use the DV450-001 (conversion cable).
On the strain module (-B12, -B35), the gauge Enter the correct settings. 2.4
method and dip switch settings are not correct.
On the strain module (-B12, -B35), the gauge
Use a module that supports the resistance value of the 2.4
resistance and internal bridge resistance values strain gauge (120 Ω, -B12; for 350 Ω, -B35).
are different
On the strain module, scaling corresponding to
Displayed with 1 gauge method conversion. 1.8
the gauge method is not set (for 2 gauge and Set scaling appropriately depending on the gauge
4 gauge methods, the amount of strain is doubled method.
or quadrupled.)
On the strain module (-NDI), a strain gauge type When using a sensor without a remote sensing wire,
2.4
sensor without a remote sensing wire is being use the DV450-001 (conversion cable).
used.
Alarms are not output.
Possible Problem
Corrective Action Ref. section
There is a problem in the alarm setting. Both the alarm and output relay must be set 3.7, 3.8
appropriately.
Make the alarm and output relay settings appropriate.
The CF card is not detected.
Possible Problem
Corrective Action Ref. section
There is a problem with the CF card. Replace the CF card. 2.10
Eject and format the CF card, then insert it again.
4.3 Troubleshooting