Hioki RM3544 - Confirming Measurement Faults

3.4 Checking Measured Values
38
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.
An unstable measured value may be displayed if the SOURCE terminal is connected to the
measurement target but the SENSE terminal has poor contact.
Example displays: Display and output when the probes are open or when the mea-
surement target is open
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
- - - - -
Current Fault or measurement not performed
This fault is displayed in the following instances. If “- - - - -” is displayed, a comparator judg-
ment 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.
Display
Temperature measurement cannot be performed because the temperature sensor has not
been connected. There is no need to connect the temperature sensor when not using tem-
perature correction. Switch the display if you do not wish to display the temperature.
See: "Switching the Display" (p.35)
- - . - °C
Temperature sensor not connected
Display
Current fault mode setting (p. 40)
Current fault Over-range
Display: - - - - -
COMP indicator: No judgment
EXT I/O: ERR signal output, no HI signal output
Display: +OvrRng
COMP indicator: Hi
EXT I/O: No ERR signal output, HI signal output