Hioki RM3545, Инструкция по эксплуатации, Страница: 63 / 364

3.5 Checking Measured Values
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When a measurement is not performed correctly, a measurement fault indicator appears
and a ERR signal of the EXT I/O is output (no ERR signal is output for over-range or
unmeasured events). Operation when a current fault occurs can be changed with the set-
tings.
See: "Appendix 14 Checking Measurement Faults" (p. A32)
Confirming Measurement Faults
This fault is displayed in the following two instances.
(1) Appears when the measured value is outside of the measurement or display range. (*1)
(2) Appears when a measurement fault(*2) occurs (when the current fault mode setting is
“Over-range”).
When no measurement current flows from the SOURCE A terminal to the SOURCE B
terminal
Similarly, if the measurement range is exceeded in temperature measurement, OvrRng is
displayed.
The comparator result is Hi when
+OvrRng is displayed, and Lo when -OvrRng is dis-
played. No ERR signal is output.
Over-range
+OvrRng
-OvrRng
Display
Contact error
See: "Appendix 1 Block Diagram" (p. A1)
(When the scan function is set to auto or step, CONTACT A or
CONTACT B will be displayed.)
CONTACT
TERM.A/B
- - - - - - -
Display
The resistance between the SENSE A and SOURCE A probe contacts, and between the SENSE B and
SOURCE B probe contacts, are measured and an error is displayed if the result is about 50
Ω
or greater.
If this error persists, probe wear or cable failure may be the cause. When the resistance value between
the SENSE and SOURCE is high, for example when the measurement target is conductive paint or con-
ductive rubber, you will not be able to perform measurement due to the continuous error state. In this case,
turn off the contact check function.
See: "4.10 Checking for Poor or Improper Contact (Contact Check Function)" (p.88)
Display
Current Fault or measurement not performed
This fault is displayed in the following instances. If “ - - - - - - - ” is displayed, a comparator
judgment will not be made.
(1) Appears when a measurement fault(*2) occurs (when the current fault mode setting is
“Current fault”).
When no measurement current flows from the SOURCE A terminal to the SOURCE B
terminal
(2) This fault is displayed when no measurement has been performed since the measure-
ment conditions were changed.
- - - - - - -
A multiplexer relay hot-switching prevention function error has occurred. The relay cannot
be switched because the current from the measurement target has not decreased. In-
crease the delay setting since the measurement circuit may be being influenced by back
EMF from a transformer or other device. Do not apply any current or voltage to the mea-
surement terminals.
See: "4.9 Setting Pre-Measurement Delay" (p.84)
SW.ERR
Multiplexer channel error
Display
No Multiplexer Unit was detected. Verify that the unit has been inserted.
Do not allocate units that have not been inserted to channels.
NO UNIT
Display
SAME
TERMINAL
Display
The same terminal has been assigned to the same channel. Review the settings.
See: "Customizing Channel Pin Allocation" (p.152)