Yokogawa DAQWORX Bedienungsanleitung PDF herunterladen (Seite 53)

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IM WX103-01E

Index

Logger

Initial Balancing of Strain Input Channels (Initial Unbalance Adjustment)

When configuring a bridge circuit with a strain gauge, due to the slight deviation in

resistance of the strain gauge, the bridge circuit will not necessarily be balanced even if

the strain of the circuit under test is zero, and the measured value may not be zero (the

value in such cases is called the initial unbalanced value.)

Therefore, when taking measurements you must first balance the bridge and, if the strain

is zero, obtain a measured value of zero. This is called initial balancing (setting the initial

unbalanced value to zero).

Measured value

Strain

Initial unbalanced value

Reset

Initial balance

With the MX100, initial balancing is performed in the ±10000µ strain range.

Initial balance: The value when the command is executed is taken as the initial

unbalanced value, and the measured value is set to zero.

Reset: The value set during initial balancing is reset to zero. The initial

unbalanced value is used for the measured value as-is.

Note

If the measuring range is changed, the initial balancing is reset. After a range change, you must

redo initial balancing.

The results of initial balancing are as follows.

Status box display Status

----- Not executed

Successful Initial balancing was executed successfully.

Failed Initial balancing failed.

OVER Initial balancing succeeded, but the output value exceeded the

upper limit or fell below the lower limit, and the value was rounded

to the upper or lower limit.

Executing Executing initial balancing

Note

If initial balancing fails, the 7-segment LED on the MX100 displays “ ” Check the module’s

installation status, then perform initial balancing again. If the error occurs even after

recalibrating, servicing is required. Please contact your nearest Yokogawa representative.

Scaling Settings of the Strain Gauge Sensor

When using the scaling settings to measure physical quantities such as load and length

using a strain gauge type sensor, set the scaling. For instructions on entering scaling

settings, see chapter 1 of the MX100 Data Acquisition unit User’s Manual, “Functional

Explanation.”

2.4 Setting the Measurement Conditions (Measurement Channel Settings)

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