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9.13 Setting the 8939 STRAIN UNIT
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s79-2
Flashing cursor
Function
display
Meaning
:
Move the cursor up in the selection window.
:
Move the cursor down in the selection window.
Function
display
Meaning
:
All strain channels execute the auto balancing.
:
Only selected channel execute the auto
balancing.
NOTE
9.13 Setting the 8939 STRAIN UNIT
For the channel to which the 8939 STRAIN UNIT is assigned, an auto
balancing must be executed through the range setup menu.
Auto balancing is a function by which the reference output level of the
converter is adjusted to the specified zero position.
Before the auto balancing is performed, the strain unit must be warmed up
for approximately 1 hour after power-on to stabilize its internal temperature.
The scaling function can be used to convert an output voltage from a sensor
or similar into a physical quantity. See Section 9.8.2.
See Section 9.3, "Setting the CHANNEL Screen" for the common settings.
Procedure
Screen: CHANNEL, Waveform display
(1) Set the measurement range.
1. Display the CHANNEL or Waveform display screen.
2. Press the CH.SET key and move the flashing cursor to
desired channel.
3. Move the flashing cursor to the range
item.
4. Use the function keys, the Jog/Shuttle control or
RANGE knob to set the measurement range.
(2) Perform auto-balance.
Set for selected channels only, or for all channels.
･ Connect the sensor, make sure there is no input, and execute auto balancing.
･ Auto balancing is disabled during measurement.
･ The key manipulation is rejected during measurement.
･ Repeat the auto balancing when the input unit was changed, when the power
is on/off, when the system is set to reset, when the measurement range is
change, when the strain gauge adapter is change.
･ When there is a sudden change in ambient temperature the zero position may
drift. To assure continued measurement precision, perform the auto balancing
again.
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