MR8740T_user_manual_eng_20191016H.pdf - 第55页
50 Conguring Measuring-Module-Specic Settings T o execute auto-balance on the list screen > [Channel] > > [Operate] > [Auto balance] Executes auto-balance for all channels of the strain modules installed in…
49
Conguring Measuring-Module-Specic Settings
Conguring Model U8969 Strain Unit settings
Model U8969 Strain Unit can execute auto-balance.
Executing auto-balance regulates the reference output level of a transducer at the specied zero
position. Auto-balance is available for Model U8969 Strain Unit only.
You can use Model 8969 Strain Unit you own with this instrument. The instrument displays the
model name of Model 8969 Strain Unit as [U8969].
Before executing auto-balance
• Turn on the instrument and leave it for 30 minutes to allow the internal temperature of the module
to stabilize.
• After connecting a strain gauge converter to the module, execute auto-balance without any input
including distortion.
• You cannot execute auto-balance during measurement.
• No operation is accepted during auto-balance.
To execute auto-balance on the channel screen of each channel
> [Channel] > [U8969]
Click [Auto balance], and then choose an auto-balance setting from the list.
One channel only Executes auto-balance for only a channel displayed on the channel screen.
All Executes auto-balance for all of the channels Model U8969 is installed in.
3
Advanced Functions
50
Conguring Measuring-Module-Specic Settings
To execute auto-balance on the list screen
> [Channel] > > [Operate] > [Auto balance]
Executes auto-balance for all channels of the strain modules installed in the instrument.
In the following cases, execute auto-balance again.
• After changing the vertical axis (strain axis) range
• After replacing any modules
• After replacing the strain gauge converter
• After cycling the instrument
• After initializing the instrument
• When the ambient temperature has signicantly changed (the zero position may drift)
If auto-balance fails
Check the following items, and re-execute auto-balance.
• Is the strain gauge converter not subjected to any load?
(Make sure that the strain gauge converter is not subjected to vibration or any other loads.)
• Is the strain gauge converter properly connected measuring object?
• Is the measuring object not subjected to any load?
51
Conguring Measuring-Module-Specic Settings
Conguring Model 8970 Freq Unit settings
> [Channel] > [8970]
1
to
2
12
1
Click the [Mode] box, and then choose a measurement mode from the list.
Frequency
Measures frequency of a waveform (in hertz [Hz]).
Rotation speed Measures the number of rotations of a measuring object (in rotations per minute [r/
min]).
Power frequency Measures power frequency uctuation (in hertz [Hz]).
Count Accumulates the number of input pulses.
Duty ratio Measures duty ratios of a waveform to be measured (in percent [%]).
Pulse width Measures pulse widths (in second [s]).
Pulses that rise during the dead time (during a calculation) cannot be measured (with a frequency of 25 kHz or
higher).
Ignored
Calculation (40 μs)Acquisition of
the waveform
Acquisition of
the waveform
2
Click the area that includes [Input voltage].
The setting dialog box appears.
3
Click the [Input voltage] box, and then choose an option for the maximum level of an input
signal from the list.
±10 V
, ±20 V, ±50 V, ±100 V, ±200 V, ±400 V
3
Advanced Functions