Specifications

AM25T Solid State Multiplexer

‘Main Program

BeginProg

Scan (1,Sec,0,0)

AM25T (TC(),25,mV2_5C,1,1,TypeT,Tref,5,4,Vx1,True,0,250,1.0,0)

CallTable Dat15sec

CallTable Dat5min

NextScan

EndProg

6.1.1.2 CR1000 Example Program 2

In this example, one AM25T instruction is used to measure the on-board PRT,

and another AM25T instruction is used to measure ten type T thermocouples.

Table 6-2 provides the wiring for the example.

TABLE 6-2. Wiring for CR1000 Example 2

Function AM25T CR1000

+12 Power 12 V 12 V

Power and Shield Ground Gnd Gnd

Clock CLK 2

Reset RES 1

RTD Excitation EX EX1

Common High HI 1H

Common Low LO 1L

Example 2. CR1000 Program that Uses Separate AM25T Instructions to Measure the PRT

and Thermocouples

'Declare Variables and Units

Public Batt_Volt

Public RTemp_C

Public Temp_C(10)

Units Batt_Volt=Volts

Units RTemp_C=Deg C

Units Temp_C=Deg C

'Define Data Tables

DataTable(Table1,True,-1)

DataInterval(0,60,Min,0)

Sample(10,Temp_C(),FP2)

EndTable

'Main Program

BeginProg

Scan(30,Sec,1,0)

'Default Datalogger Battery Voltage measurement Batt_Volt:

Battery(Batt_Volt)