Campbell CR510 Manuale dell'Operatore Scaricare il pdf (Pagina 157)

SECTION 13. CR510 MEASUREMENTS

13-13

integration as is normally the case (Section

13.2). The result stored is the voltage

measured. Instruction 8 does not have as good

resolution or common mode rejection as the

ratiometric bridge measurement instructions. It

does provide a very rapid means of making

bridge measurements as well as supplying

excitation to circuitry requiring differential

measurements. This instruction does not

reverse excitation. A 1 before the excitation

channel number (1X) causes the channel to be

incremented with each repetition.

The output of Instruction 8 is simply the voltage

measurement. When 8 is used to measure a

full bridge (same connections as Instruction 6 in

Figure 13.5-1), the result is V

which equals V

/(R

) - R

/(R

)). (In other words, to

make the output the same as Instruction 6, use

a factor of 1000/V

in the multiplier.)

FIGURE 13.4-1. Circuits Used with Instructions 4-9

1 2 ... 152 153 154 155 156 157 158 159 160 161 162 ... 263 264

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Campbell CR510 Manuale dell'Operatore Pagina 157