Spectrum Controls 140 AUI 040 00sc User Manual
Page 39
16-Channel Universal Analog Input Module
41
Range
Signed 16 bit**
Unsigned 16 bit
Unsigned 12 bit
DVM deg C
DVM deg F
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
RTD Pt 385
-32,767 32,767
0
65,535
0
4,095
-2,000
8,500
3,280
15,620
RTD Pt 385
-32,767 32,767
0
65,535
0
4,095
-2,000
8,500
3,280
15,620
RTD Pt 385
-32,767 32,767
0
65,535
0
4,095
-2,000
8,500
3,280
15,620
RTD Pt 385
-32,767 32,767
0
65,535
0
4,095
-2,000
8,500
3,280
15,620
RTD Pt 3916
-32,767 32,767
0
65,535
0
4,095
-2,000
6,600
3,280
11,660
RTD Pt 3916
-32,767 32,767
0
65,535
0
4,095
-2,000
6,600
3,280
11,660
RTD Pt 3916
-32,767 32,767
0
65,535
0
4,095
-2,000
6,600
3,280
11,660
RTD Pt 3916
-32,767 32,767
0
65,535
0
4,095
-2,000
6,600
3,280
11,660
RTD Nickel 618
-32,767 32,767
0
65,535
0
4,095
-600
2,500
-760
3,560
RTD Nickel 618
-32,767 32,767
0
65,535
0
4,095
-600
2,500
-760
3,560
RTD Nickel 618
-32,767 32,767
0
65,535
0
4,095
-600
2,500
-760
3,560
RTD Nickel 618
-32,767 32,767
0
65,535
0
4,095
-600
2,500
-760
3,560
RTD Copper 426
-32,767 32,767
0
65,535
0
4,095
1,000
2,600
1,480
5,000
RTD Nickel 672
-32,767 32,767
0
65,535
0
4,095
-800
2,600
1,120
5,000
RTD Nickel/Iron 518
-32,767 32,767
0
65,535
0
4,095
1,000
2,000
1,480
3,920
Thermocouple type J
-32,767 32,767
0
65,535
0
4,095
-2,100
7,600
-3,460
14,000
Thermocouple type K
-32,767 32,767
0
65,535
0
4,095
-2,700
13,700
-4,540
24,980
Thermocouple type T
-32,767 32,767
0
65,535
0
4,095
-2,700
4,000
-4,540
7,520
Thermocouple type E
-32,767 32,767
0
65,535
0
4,095
-2,700
10,000
-4,540
18,320
Thermocouple type R
-32,767 32,767
0
65,535
0
4,095
0
17,680
320
32,140
Thermocouple type S
-32,767 32,767
0
65,535
0
4,095
0
17,680
320
32,140
Thermocouple type B
-32,767 32,767
0
65,535
0
4,095
3,000
18,200
5,720
32,667*
Thermocouple type N
-32,767 32,767
0
65,535
0
4,095
0
13,000
320
23,720
* Thermocouple Type B readings are clipped at 32,767 counts fo rthe DVM and degF scales. Readings above 32,767 are
flagged as an over-range error.
** Same as 15bit + sign.
6.7 RTD and Thermocouple inputs.
Thermocouples convert temperature to very small voltages. The Quantum Universal module’s specifications
for thermocouple inputs assume the 50/60 Hz filter setting or the low speed (7.8 Hz 3dB, 28Hz stop freq) filter
is being used. These two filter settings are recommended for thermocouple inputs. Using the two faster filter
settings will provide a faster update rate, but with noise and accuracy degradation.
RTDs are resistance temperature detectors. RTDs convert temperature to resistance levels which the
quantum universal measures. In some cases the resistance change per degree is very small. The accuracy
specifications assume the 50/60 Hz filter or the low speed filter (7.8Hz 3db) is being used. These two filter
settings are recommended for RTD inputs.
Recommended filter settings for RTD and thermocouple inputs are listed below.
Filter
J, K, T, E, N
S, B, N
RTD
Thermocouple inputs
Thermocouple inputs
Inputs
Reject 50/60Hz Recommended
Recommended
Recommended
Reject 28Hz
Recommended
Recommended
Recommended
Reject 800 Hz Some accuracy
Not recommended
Minimal
degradation
accuracy degradation
Reject 6400Hz Do not use
Do not use
Not recommended