National Instruments NI 9944 用户手册

The NI 9944/9945 has outer dimensions of 66 × 21.6 × 22.96 mm 
(2.6 × 0.85 × 0.90 in.), as shown in Figures 2 and 3.

Figure 2.  NI 9944/9945 Dimensions

Figure 3.  NI 9944/9945 Dimensions and Hole Clearance

The following specifications are typical for the range 

–

40 to 70 °C, unless 

otherwise noted.

Weight ....................................................32 g (1.1 oz)

Operating temperature ............................–40 to 70 °C 

Resistor value

NI 9944............................................120 

Ω

NI 9945............................................350 

Ω

Resistance drift

NI 9944............................................0.012 

Ω/°C

NI 9945............................................0.035 

Ω/°C

Resistor tolerance (at 25 °C)...................0.1% max

Resistor power ........................................0.25 W max

21.6 mm
(0.85 in.)

66 mm (2.6 in.)

Ø 4.57 mm (0.180 in.)

Ø 8.89 mm (0.350 in.)

22.86 mm

(0.90 in.)

Holes for
Tie Strap