Hioki LR8410-20, Инструкция по эксплуатации

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Appendix 9 Frequently Asked Questions
A
25
Appendix
Measuring
Question
Remedial Action
Reference page
What should I do about zero off-
set when the input is shorted? Execute zero adjustment to compen-
sate for offset when the inputs are short-
ed. "2.7 Compensating for
Input Circuit Offset (Ze-
ro Adjustment)" (p. 63)
Even though a signal is only input
on CH1, why do similar wave-
forms appear on unused chan-
nels?
An open-circuit input terminal can be af-
fected by signals on other channels. By
closing the input terminal circuit, normal
measurement is possible. If this is im-
practical, disable unused measurement
channels, or short the + and - terminals
together.
How to display numerical data
values? Press WAVE/DATA repeatedly to cycle
through the Waveform (only), Waveform
+ Numerical Values, and Numerical Val-
ues (only) displays.
Numerical values can be displayed in a
large font on the enlarged numerical dis-
play.
Numerical values at specific locations
can be displayed using A/B cursors.
"Settings Screens" (p .34)
"Viewing Input Signals
as Numerical Values"
(p .115)
"Displaying Cursor Val-
ues" (p .119)
What is the timing difference

between CH1 and CH2?
When the [Filter] is Off, the time differ-
ence between data on neighboring
channels is about 5 ms, regardless of
recording interval. When the
[Filter] is
enabled (50 or 60 Hz), the time differ-
ence increases with longer recording in-
tervals.
Sampling discrepancies between mea-
surement units are within 1 sampling cy-
cle (recording interval), regardless of
the number of units.
"Appendix 1 Scan Tim-
ing" (p. A1)
How can I apply markers while
measuring for easy searching lat-
er? How can I search for alarm
event locations? Event marks can be applied by the fol-
lowing methods.
• Press
START while measuring
• Press the on-screen [Make Mark]
button.
• Apply a signal to the EXT.TRIG termi-
nal
• When a warning occurs
"4.3 Marking Wave-
forms and Searching
Marks (Search Func-
tion)" (p. 121)
Multiple temperature measure-
ment values are scattered, even at
the same location. Is it possible to
match the value measured on
CH1? The Offset Cancel function is conve-
nient for this.
The value measured on UNIT1, CH1 is
used as the scaling (offset) value for
other channels. "3.7 Scaling Settings
(as needed)" (p. 95)
Is it possible to signal an alarm on
ALM1 when the temperature on
CH1 exceeds 40

C, and on ALM2
when it exceeds 50

C?
Yes. Four alarm channels are provided.
Multiple alarms can be assigned to the
same input channel. "5.9 Alarm Output" (p.
151)