Measurement Computing TempScan/1100 User Manual
Page 53

TempScan / MultiScan User's Manual
889897
Scanning Cards 3-5
TempV/32B Description
The TempV/32B voltage scanning module contains 32 differential input channels and is capable of
measuring analog input signals on any of four programmable ranges: ±100 millivolt, ±1 volt, ±5 volt and
±10 volt.
For differential input configuration, each input must have biasing currents. A certain amount of current
must be flowing into the differential inputs or else capacitance-induced noise will make the inputs appear as
noise.
The low side of each differential input channel is provided with a switchable 10-k
Ω resistor to analog
common. This allows a current path when no current is flowing due to no common ground connections or a
high-impedance input source. With no common ground connection, closing the switch connects a 10-k
Ω
resistor between the (L) input and ground and provides a common mode impedance.
The relationships between the DIP microswitches and specific channels are described in the table.
TempV/32B Channel-to-Microswitch Relationships
Channel
Microswitch
Channel
Microswitch
Channel
Microswitch
Channel
Microswitch
1
S6-8
9
S3-8
17
S5-8
25
S4-8
2
S6-7
10
S3-7
18
S5-7
26
S4-7
3
S6-6
11
S3-6
19
S5-6
27
S4-6
4
S6-5
12
S3-5
20
S5-5
28
S4-5
5
S6-4
13
S3-4
21
S5-4
29
S4-4
6
S6-3
14
S3-3
22
S5-3
30
S4-3
7
S6-2
15
S3-2
23
S5-2
31
S4-2
8
S6-1
16
S3-1
24
S5-1
32
S4-1