Specifications

Single-Channel 1/4 Bridge Measurements

This program makes a

⁄

bridge strain measurement on channel 0 of

multiplexer card number 1.

!Clear and reset the multimeter.

CLEAR 70903

OUTPUT 70903;"*RST"

!Specify the gage factor for the channel measured.

OUTPUT 70903;"STR:GFAC 2.11E-6,(@100)"

!Measure the channel’s unstrained reference.

OUTPUT 70903;"CAL:STR (@100)"

DISP "Add tension to the specimen; then press ’Continue’"

PAUSE

DISP ""

!Measure the strain on the channel. Enter and display the reading.

OUTPUT 70903;"MEAS:STR:QUAR? (@100)"

ENTER 70903;Strn_rdg

PRINT Strn_rdg

END

Comments • The wiring diagram used for this example is on page 28.

• Specifying the gage factor as 2.11E-6 returns the strain measurement

in microstrain.

• A gage factor must be specified and an unstrained reference must be

measured for each channel.

Chapter 3 Making Strain Gage Measurements 35

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