Campbell CR800 Specifikace stáhnout pdf (Strana 161)

Section 7. Measurement Instructions

Half Bridge Parameters

Parameter

& Data Type

Enter

Dest

Variable or

Array

The Variable in which to store the results of the instruction. When Reps are used the

results are stored in an array with the variable name. An array must be dimensioned to

have elements for all the Reps.

Reps

Constant

The number of repetitions for the measurement or instruction.

Range

Constant

Alpha Code

Voltage Range

mV5000

± 5000 mV

mV2500

± 2500 mV

mV250

± 250 mV

mV25

± 25 mV

mV7_5

± 7.5 mV

mV2_5

± 2.5 mV

Autorange

mV2_5 − mV5000

Selects range (Sect. 3.1)

mV250C

± 250 mV The mV250C, mV25C, mV7_5C, and

mV25C

± 25 mV mV2_5C ranges pull the channel into

mV7_5C

± 7.5 mV common mode range and check for open

mV2_5C

± 2.5 mV input

AutorangeC

mV2_5 − mV250

Selects C range

SEChan

Constant

The single-ended channel number on which to make the first measurement. When Reps

are used, subsequent measurements will be automatically made on the following single-

ended channels. If the channel is entered as a negative number, all reps occur on that

channel.

ExChan

Enter the excitation channel number to excite the first measurement.

Constan

Alpha

Code

Code/

Channel

Result

VX1 1 Switched excitation channels, are switched to the excitation

voltage.

VX2 2 for the measurement and switched off between measurements.

VX3 3

MeasPEx

Constant

The number of sensors to excite with the same excitation channel before automatically

advancing to the next excitation channel. To excite all the sensors with the same

excitation channel, the number should equal the number of Reps.

ExmV

Constant

The excitation voltage in millivolts. Allowable range ± 2500 mV. RevEx may be used to

excite with both a positive and negative polarity to cancel offset voltages.

RevEx

Code Value Result (Reversing requires twice as much time to complete)

Constant False 0 Excite only with the excitation voltage entered

True

≠0

A second measurement is made with the voltage polarity

reversed to cancel offsets

RevDiff

Code Value Result (Reversing requires twice as much time to complete)

Constant False 0 Signal is measured with the high side referenced to the low

True

≠0

A second measurement is made after reversing the inputs to cancel

offsets

7-7

1 2 ... 156 157 158 159 160 161 162 163 164 165 166 ... 323 324

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