Справочник Пользователя для National Instruments NI 9144

Configuring all the channels in full-bridge mode shorts the channels and results 

in the firmware setting all the bits in the lower nibble.

When a channel over-current condition occurs on any of the channels of the 
NI 9219 (such as, configure channels in 4-wire resistance mode and do not 
connect a resistor to the channel), the firmware sets a bit in the lower nibble 
indicating the presence of this condition (LSB = ch0). 

The NI 9219 has four channels which each have 21 different operating 
modes and ranges. Each channel has an associated LSB weight, which is 
the number of volts per bit, and an offset, which is the number of volts per 
bit measured when the inputs are grounded.

LSB weight is referred to as Gain in the object dictionary.

The operating modes and ranges, in the order they are defined in the 
calibration table for each channel, are:

Table 34.  NI 9219 Channel Calibration

1

Voltage

 ±60 V

2

 ±15 V

3

 ±4 V

4

 ±1 V

5

 ±125 mV

6

Current

 ±25 mA

7

4-Wire Resistance

10 k

Ω

8

1 k

Ω

9

2-Wire Resistance

10 k

Ω

10

1 k

Ω

11

Thermocouple

n/a

12

4-Wire RTD

Pt1000

13

Pt100