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Sensoray Model 118 Smart A/D™ Instruction Manual 5 Hardware Configuration

not the source is ground-referenced. Table 2 lists the

recommendations for enabling vs. disabling the SCC:

3.2.3 Shunt Mapping

Shunts CH1 through CH7, located on the circuit board as

shown in Figure 2, control the enabling of the channel

SCCs. Each channel is affiliated with one shunt. To

enable a channel’s SCC, you must install the affiliated

shunt. Similarly, to disable the SCC, you must remove

the shunt.

Table 3 shows the mapping between channels and

affiliated shunts for SCC enables.

For example, install shunt CH2 to enable the SCC for

sensor channel 2.

Table 2: Recommended signal conditioner settings

Sensor Type SCC

Ungrounded Thermocouple Enabled

Isolated DC Voltage Source

Grounded Thermocouple Disabled

Ground-referenced DC Voltage Source

4-to-20 mA loop

Resistor

RTD

Strain/Pressure Gage

Thermistor

Table 3: SCC shunt mapping

Channel 0 1 2 3 4 5 6 7

Shunt

CH1 CH2 CH2 CH3 CH4 CH6 CH7 CH8

1 2 3 4 5 6 7 8 9 10 11 12 ... 37 38

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