Bb-electronics 4 Channel Input Buffer Board SDAIBB Manuel d'utilisateur télécharger pdf (Page 19)

SDAIBB3599 Manual A-1

B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104

Appendix A: Glossary

Common Mode Voltage

()

The voltage about which a differential

voltage swings. When this is measured on the SDAIBB it is calculated

with all voltage readings taken in reference to GND of the SDAIBB as

()

−+

+ ININ

. Note that when one of the inputs is connected to GND of

the SDAIBB the common mode voltage changes as the differential voltage

changes.

Differential Voltage

()

DIFF

The difference in voltage across two points

such as the two leads on a thermocouple. When this is measured on the

SDAIBB it is calculated with all voltage readings taken in reference to

GND of the SDAIBB as

−+

−

ININ

Gain

()

The amount by which the input is multiplied before it is output.

−+

−

ININ

Gain

out

Impedance Mismatch:

When the output impedance of sensor is different

enough from the input impedance of the data acquisition device to cause

improper sensor readings.

Negative Input Differential:

When the voltage and IN- is higher than the

voltage at IN-. 0≤−

−+

ININ

Negative Rail:

The lowest possible voltage that can be output. For the

SDAIBB there is a negative rail internal to the buffer and a negative rail on

the output of the buffer.

Positive Rail:

The highest possible voltage that can be output. For the

SDAIBB there is a positive rail internal to the buffer and a positive rail on

the output of the buffer.

1 2 ... 14 15 16 17 18 19 20 21 22

Commentaires sur ces manuels

Pas de commentaire

Bb-electronics 4 Channel Input Buffer Board SDAIBB Manuel d'utilisateur Page 19

Commentaires sur ces manuels