Hioki DM7275 Series, Instruction Manual

Page: 168 / 207

169
Q&A (Frequently Asked Questions)
No. Issue Items to check Possible causes → Solutions See
1-5 No judgment
sound.
Buzzer setting
for comparator
function
OFF The function is OFF .
→ Set the function to ON .
p. 55
ON
Buzzer volume is OFF.
→ Set the volume to a value other
than
OFF
.
p. 88
-
BIN measurement
→ No judgment sound.
p. 56
*: Communication Command Instruction Manual provided with the application disc
2. Measurements
No. Issue Items to check Possible causes → Solutions See
2-1 Measurement
values are not
stable.
Effects of noise May be susceptible
to noise
See “Appx. 4 Noise
Countermeasures”
p. Appx.8
Circuit to be
measured
AC signal is
superimposed.
See “6.1 Obtaining Stable
Measured Values” (p. 67).
p. 67
Temperature is
not stable (just
manufactured, just
unpacked, or is held
by hand, etc.).
Leave the object to be measured to
adapt to the ambient temperature.
Output resistance
(internal resistance)
of the object to be
measured is high.
The instrument’s bias current
or input resistance is affecting
measurement results.
→ If the range is 10 V or less, set
the input resistance to AUTO.
p. 76
p. Appx.5
Temperature
compensation
(
TC )
ON The temperature sensor is not
appropriately positioned.
→ Move the temperature sensor
closer to the measurement target.
→ Position the temperature sensor
so that it is not affected by airflow.
→ If the measurement target
responds to temperature changes
more slowly than the temperature
sensor, increase the temperature
sensor’s response time by covering
it with something. The temperature
sensor’s response time is about 10
minutes (reference value).
p. 10
Temperature coefficient is not set
appropriately.
→ Measure the temperature
coefficient of the object to be
measured in advance and set the
value to the instrument.
p. 80
OFF The measurement target’s voltage
value is fluctuating due to the
temperature, for example, when
the room temperature has not
stabilized.
→ Turn ON temperature
compensation ( TC ).
p. 80
Maintenance and Service
14
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