Chromalox 2110 Bedienungsanleitung PDF herunterladen (Seite 12)

Chromalox 2110

Section 3–Installation and Wiring

Sensor Input Wiring

Sensor Wiring Notes

For safety and best controller performance,

• Sensor leads (thermocouple and RTD) should not be run in the

same conduit as power wiring.

• Twisted pair, shielded wire is recommended for sensor connections.

• False temperature readings can occur if the sensor wire is exposed

to electrical noise.

• Ungrounded thermocouples are recommended.

• Thermocouple extension wire, if required, must be the same type

as the thermocouple (i.e. if a Type K thermocouple is used, then

Type K extension wire must be used.)

• Shielded thermocouple wire, if used, must have the shield ground-

ed at one end only, preferably at the shield ground terminal on the

controller as shown in Figure 3.6.

• Three-wire RTDs are recommended for greatest accuracy.

• Standard shielded copper wire is recommended for RTD exten-

sions.

Thermocouple Inputs

It is important to observe polarity (+,-) when connecting thermocouple

leadwires. ANSI color coding for the thermocouples used with this

instrument are

Thermocouple

Type Material Polarity (+) Polarity (-)

J iron/constantan white red

K chromel/alumel yellow red

Make thermocouple wiring connections to terminals as shown in Fig-

ure 3.6.

Figure 3.6

Thermocouple Connections with Shield

TC -

COM

TC +

Shield Ground

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Chromalox 2110 Bedienungsanleitung Seite 12