Rockwell-automation 1771-IR , D17716.5.76 RTD INPUT MODULE Manual de usuario descargar pdf (Pagina 35)

Module Calibration

Chapter 7

72

Calibration of the module consists of applying 1.00 ohm resistance across each

input channel for offset calibration, and 402.00 ohm across each input channel

for gain correction.

Offset Calibration

Normally all inputs are calibrated together. To calibrate the offset of an input,

proceed as follows:

1. Connect 1.00 ohm resistors across each input channel as shown in

Figure 7.1.

Figure 7.1

Resistor

Location for Offset Calibration

12935

Channel 1

Channel 2

Channel 3

Channel 4

Channel 5

Channel 6

Terminal

Identification

1.00 ohm Resistor

Repeat for

each

channel

2. Apply power to the module.

3. After the connections stabilize, request the offset calibration by setting bit

00 in block transfer write word 15 and sending a block transfer write to the

module. Refer to Table 7.A.

Performing Auto-calibration

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 67 68

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Rockwell-automation 1771-IR , D17716.5.76 RTD INPUT MODULE Manual de usuario Pagina 35