Hioki 8847, Instruction Manual

Page: 68 / 372

3.7 Measurement With Automatic Range Setting (Auto-Ranging Function)
58
This applies only to the Memory function and analog modules.
When you press the AUTO key after inputting a signal to an analog unit, and
select [Auto Range] , the horizontal axis (time axis) range, vertical axis (voltage
axis) range, and zero-adjust point will be set automatically for the input wave-
form, and measurement starts.
The range is determined for each channel that has its waveform enabled
[On]
for measuring. The timebase is automatically set so that 1 to 2.5 cycles are
recorded within 25 divisions on the lowest-numbered channel being used.
When measuring using the auto-ranging function, the following items are
changed.
3.7 Measurement With Automatic Range
Setting (Auto-Ranging Function)
Input-Module-Related Conditions (all channels)
Vertical axis (Voltage axis)
range
Auto setup value
Zero Position
Vertical axis (Voltage axis)
magnification
×
1
Low-pass filter Off
Input coupling DC
Trigger Criteria (one channel only)
Trigger mode Auto
Trigger source AND/OR OR
Pre-Trigger 20%
Internal Trigger
Out of waveform display On channels, channel with low-
est number only is On (next channel if difference between
maximum and minimum value is 8 divisions or less).
Trigger type
Level trigger : Slope, Rising
Trigger level : Auto setup value
Filter : Off
Status screen - [Status] sheet Conditions
Timebase Auto setting value (time axis magnification
×
1 )
• When measurement is started with the auto-ranging setting, the trigger output
signal is output. Keep this in mind when performing auto-range measurement
while using the trigger output terminal.
• The auto-ranging function automatically makes settings for the input signal that
is present when the function is enabled. Start auto-ranging measurement after
supplying the input signal (waveform).
• If the input signal of the lowest numbered channel selected for waveform dis-
play is extremely small, the time axis range will be set according to the input
signal of the next lowest channel.
• If range could not be set for all waveform display On channels, a warning mes-
sage appears and the measurement is interrupted.
• The Auto Save and Auto Print functions do not operate during auto-ranging.
• For low-frequency signals of less than 10 Hz, automatic setting is not possible.
Make the required setting manually.
• Automatic setting is not possible for the following modules:
8967 Temp Unit, 8969 Strain Unit, 8970 Freq Unit