SCXI-1303 Installation Guide
10
©
National Instruments Corporation
Cleaning the Terminal Block
Clean the terminal block by brushing off light dust with a soft, nonmetallic
brush. Remove other contaminants with deionized water and a stiff
nonmetallic brush. The unit must be completely dry and free from
contaminants before returning to service.
Specifications
Cold-junction sensor
Accuracy
1
........................................0.5° from 15° to 35° C
0.9° from 0° to 15°
and 35° to 55° C
Repeatability....................................0.2° from 15° to 35° C
Output ..............................................1.91 to 0.58 V from 0° to 55° C
Temperature Sensor Circuit Diagram
The circuit diagram in Figure 5 provides optional details about the
SCXI-1303 temperature sensor.
Figure 5.
Temperature Sensor Circuit Diagram
1
Includes the combined effects of the temperature sensor accuracy and the temperature difference between the temperature
sensor and any screw terminal. The temperature sensor accuracy includes tolerances in all component values, the effects
caused by temperature and loading, and self-heating.
4.7 k
Ω
1%
5 k
Ω
0.1%
MTEMP
2
4
1
2
1
2
2
3
1
+
DTEMP (Not Used)
5 k
Ω
at 25
o
C
10
µ
F
16 V
0.1
µ
F
0.1
µ
F
-t
o
+5 V
2.5 V
BERG 2x2
W1
LM 4040
2.5 V
0.1%
Summary of Contents for SCXI-1303
Page 11: ......
