MR8740、MR8741_user_manual_eng_20191016H.pdf - 第181页

7.9 Setting Details of Modules 169 6 Chapter 7 Utility Functions 7 See: Opening the [Each Ch] sheet, Making a Channel Sele ction (p.161) Mode There is no need to chang e the setting si nce it is set when the cla mp senso…

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7.9 Setting Details of Modules
168
Level This is enabled only when [Mode] is [Pulse Width] or [Duty].
In pulse width/ duty rate measurements, set which level is detected when the
threshold is exceeded.
Select
See: Opening the [Each Ch] sheet, Making a Channel Selection ( p.161)
Smoothing This is enabled only when [Mode] is [Frequency] or [RPM].
Set smoothing.
Select
Hold This is enabled only when [Mode] is [Frequency] or [RPM].
Set hold for the frequency and summing.
Select
Selections Description
High Measures above the threshold value. (default setting)
Low Measures below the threshold value.
Selections Description
Off
The measured data is recorded as is. (A step waveform.)
(default setting)
On
The measured data is interpolated so that the waveform is smooth
and then it is output. (Further delayed from upper limit 10 kHz and
Off.)
Selections Description
Off
(1Hz/0.5Hz/
0.2Hz/0.1Hz)
When the frequency in the brackets is reached but not determined,
it is defined as a stopped item and the measurement value be-
comes 0 Hz (0 rpm). (default setting)
On The value defined last time is retained.
7.9 Setting Details of Modules
169
6
Chapter 7 Utility Functions
7
See: Opening the [Each Ch] sheet, Making a Channel Selection (p.161)
Mode There is no need to change the setting since it is set when the clamp sensor is
automatically recognized.
Select
*: When Model CT6846 or CT6865 is connected to Model 8971 Current Unit through Model 9318
Conversion Cable, the instrument recognizes that as an 500 A AC/DC sensor is connected;
set the scaling ratio to 2.00.
Range
Select
7.9.6 Setting Model 8971 Current Unit
Selections Description
20A/2V
Sets this option when Model 9272-10 (20 A range), 9277, or
CT6841 Clamp Sensor is connected. (default setting)
200A/2V
Sets this option when Model 9272-10 (200 A range), 9278,
CT6863, or CT6843 Clamp Sensor is connected.
50A/2V Sets this option when Model CT6862 Clamp Sensor is connected.
500A/2V
Sets this option when Model 9279, 9209, CT6544, CT6845,
CT6846*, or CT6865* Clamp Sensor is connected.
Selections Description
DC Current measurement (Default setting)
RMS RMS current measurement
• 8971 Current Unit cannot be used with MR8741.
• With MR8740, up to four 8971 Current Units can be used.
7.9 Setting Details of Modules
170
See: Opening the [Each Ch] sheet, Making a Channel Selection (p.161)
Mode Switches between voltage measurement and RMS measurement.
Select
Response Response can be set to three speeds: Fast, Normal and Slow.
Normally set to [Fast], this can be changed to [Normal] or [Slow] to stabilize the
display when measuring low frequencies, or when severe fluctuations are
present.
Select
7.9.7 Setting Model 8972 DC/RMS Unit
Selections Description
DC
Voltage measurement (default setting)
RMS
RMS measurement
Selections Description
Fast
Sets the response time to about 100 ms. (default setting)
Normal
Sets the response time to about 800 ms.
Slow
Sets the response time to about 5 s.