Campbell AM25T Spezifikationen PDF herunterladen (Seite 20)

AM25T Solid State Multiplexer

18: Thermocouple Temp (DIFF) (P14) ;Measure the connected thermocouple

1: 1 Reps

2: 1 5 mV Slow Range

3: 1 DIFF Channel

4: 1 Type T (Copper-Constantan)

5: 1 Ref Temp (Deg. C) Loc [ RefTemp_C ]

6: 2-- Loc [ TC_1 ]

7: 1.0 Mult

8: 0.0 Offset

19: End (P95) ;End loop

20: Do (P86) ;Turn off AM25T

1: 52 Set Port 2 Low

6.3 Example CR23X Program

The CR23X has a special instruction for measuring thermocouples or voltages

with the AM25T. Example 5 uses the instruction to measure 25 type T

thermocouples. Instruction 134 automatically compensates for long lead

lengths.

TABLE 6-4. Wiring for CR23X Example

Function AM25T CR23X

+12V Power 12 V 12 V

Power and Shield Ground

Clock CLK C1

Reset RES C2

RTD Excitation EX E1

Analog Ground AG

Common High HI 1H

Common Low LO 1L

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 35 36

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Campbell AM25T Spezifikationen Seite 20