Watlow Series 92 Manual de usuario descargar pdf (Pagina 6)

6 WATLOW Series 92 User's Manual

Input Wiring

NOTE:

When an external device with a non-

isolated circuit common is connected

to the DC (open collector) output, you

must use an isolated or ungrounded

thermocouple.

k NOTE:

Jumper Terminals 11 and 12

for a 2 wire RTD.

2 Wire RTD 3 Wire RTD

NOTE:

Long lead lengths create electrical resistance. There will be approximately +2°C input error for every 1Ω of lead

length resistance, when using a two wire RTD. That resistance, when added to the resistance of the RTD element,

can result in erroneous input to the instrument. To overcome this problem, use a three wire RTD sensor, which

compensates for lead length resistance. When extension wire is used for a three wire RTD, all three extension wires

must have the same electrical resistance. (i.e. same gauge, copper stranded.)

Figure 7 - RTD Wiring

Figure 6 - Thermocouple Wiring

10 11 12 13 14 15 16 17

Red

92XX - XXP1 - X0XX 92XX - XXP1 - X0XX

92XX - XXJ1 - X0XX

92XX - XXJ2 - X0XX

92XX - XXK1 - X0XX

92XX - XXT1 - X0XX

10 11 12 13 14 15 16 17

1 2 3 4 5 6 7 8 9 10 11 12 13

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Watlow Series 92 Manual de usuario Pagina 6