Hioki 8847, Instruction Manual

Page: 154 / 372

8.10 Making Detailed Settings for Input Modules
144
The 8969 Strain Unit can perform auto balance.
When auto balance is performed, the reference output level of the conversion
unit can be matched with the specified zero position.
It is applicable only to a 8969 Strain Unit.
Before executing auto-balance ___________________________________
• Turn power on and wait 30 minutes to allow the internal temperature of the
input module to stabilize.
• With the sensor connected to the input module, execute auto-balance under
stable input conditions.
• Auto-balance cannot execute during measurement.
• Key operations are not accepted while auto-balance is executing.
To execute auto-balance ________________________________________
See: Opening the [Each Ch] sheet, Making a Channel Selection (

p.140)
Auto Balance can also be executed from the Channel settings window (Analog
sheet) (if the range of a channel with installed 8969 Strain Unit is selected).
See: Opening the Channel settings window ( [Analog] sheet): (

p.52)
In the following cases, auto-balance should be executed again.
• After changing the vertical axis (strain axis) range
• After an input module has been removed or inserted
• After the strain gauge transducer has been replaced
• After power has been turned off and on
• After performing a system reset
• When ambient temperature has changed significantly (the zero position may
drift)
8.10.4 Settings for the 8969 Strain Unit
Setting Item: [Range]
Selections Description
Auto Bal All
Chs
Auto Balance is executed for all channels where the 8969 Strain
Unit is installed.
Auto Bal Ch 1
Auto Balance is executed for the currently selected channel.
If "Warning: Auto balance failed." appears:
The channel on which auto-balance failed is displayed.
Verify the following, and execute again:
• Is the sensor in a discharged state? (Make sure that it is not being subject to
vibration, etc.)
• Is the sensor connected correctly?