General Wiring Instructions; Thermocouple Inputs - Thermo Scientific SmartView SV100A User Manual

General Wiring Instructions

Thermocouple Inputs

Thermo Fisher Scientific
Grounding: Signal cable shields or screens should be terminated at the

device end of the wire, not at the SV100A. Do not terminate shields at
both ends, as this will set up a current loop in the shield. Read the
procedures before connecting inputs to the terminals.
Wires: We recommend twisted and shielded 16 AWG wiring for all

input signal wiring. Give wires 6 to 18 twists per foot of wire (18 is
recommended). For accuracy, we recommend using equal length wires
(equal resistance) for RTD wires. Use 14 AWG wire for 10-ohm
copper RTDs and any long distance runs. If 14 AWG wire is to be
directly terminated at the recorder, terminal lugs must be used (see
Terminal Connectors).
Terminal Connectors: The screw terminal connectors are of the

double-tier, clamping screw variety, putting even pressure on the signal
wire. Therefore, it is not necessary to terminate the wires with lugs.
Lugs must be used for any wire larger than 16 AWG. The maximum
gauge wire that can be accommodated without lugs is 16 AWG. If lugs
are used, a maximum width of 0.25 inch is allowed.
Required Tools: You will need a small screwdriver and a pair of wire

cutters/strippers. We also recommended using shielded, twisted lead
wire to minimize electromagnetically induced noise.
Thermocouple input connections are made as shown in the view in Figure
2–8.
Figure 2-8. Typical thermocouple input
Installation & Wiring
Wiring Procedures
SV100A/SV10AC User Guide 2-11