Vishay 2310 Betriebsanweisung PDF herunterladen (Seite 19)

Table 1 Parameters for Testing

Strain load can be simulated when a shunt resistor is connected to the Wheatstone bridge

in parallel to the active gauge. For the first output testing, three different shunt resistors are used

to simulate three different strains for each signal conditioner. For each shunt resistor, five

readings are taken with each signal conditioner. The three shunt resistors used in this testing

have the resistance of 12.88kΩ, 35.92kΩ, and 45.05kΩ, simulating strains of 4406 micro strain,

1751 micro strain, and 1268 micro strain respectively.

The shunt resistor is connected to the circuit before the recording starts. It is disconnected

from the circuit approximately five seconds after the recording starts. The recording continues

for 10 to 15 seconds until the readings stabilize for at least five seconds. A voltage reading is

acquired by calculating the absolute difference between the average voltage before disconnecting

the shunt resistor, and the average voltage after the signal stabilizes. The strain reading is given

by expression:







 



 

where 



is the voltage reading, Gain is the amplifier gain, 



is the excitation voltage,

and F is the excitation voltage.

The strain readings are evaluated for noise, accuracy and precision. The results of these

three parameters are compared for the four tested systems to eliminate systems with undesirable

performance.

Vishay

2310

Omega

DMD-465WB

Honeywell

UV-10

DATAQ

DI5B38-04

Tacuna

Excitation

10V

Gain

191

239*

200

333.3

220

Warm-up

Time

45 min

10 min

5 min

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 142 143

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