by Ajay Singh | Updated: 01/15/2024 | Comments: 0
Campbell Scientific’s CS223 Pt-1000 Class A, Back-of-Module Temperature Sensor (discontinued effective 31 October 2023) has been replaced by the CS241 Pt-1000 Class A, Back-of-Module Temperature Sensor. When needed, you can replace the CS223 sensor head with a CS241 head without having to replace the entire cable. This blog article explains the steps to take so you can use the existing cable already installed in the field.
The CS223 was available in two configurations. Check to see which one you have, as the instructions for replacement are somewhat different.
This configuration used prewired connectors, which was most preferred by our customers as it minimized the need for wiring in the field. The configuration consisted of three parts:
This version used the 3WHB10K Terminal Input Module (TIM) for the completion resistor and did not use a bulkhead panel-mount connector. The customers had to complete the field wiring themselves. The parts in 1 and 2 above were the same. The parts in 3 were not used. A wiring diagram is shown below.
For the conversion, you will need pn 32932 and a circular, plastic, M12-type socket, eight-pin connector sold as a kit (pn 39570), also referred to as the CS241 field install kit for CS240 replacement.
You will need this if you want to use the existing cabling but want to replace the CS223 with a CS241.
Wire Color | Pin on the Connector | Data Logger |
---|---|---|
White | 1 | ⏚ |
Blue | 3 | SE-L |
Gray | 4 | SE-H |
Black | 5 | Excite (Vx1) |
Wire Color | Pin on the Connector | Data Logger |
---|---|---|
White | 1 | ⏚ |
Blue | 3 | SE-L |
Gray | 4 | SE-H |
Black | 5 | Excite (Vx1) |
Please use the following lines of CRBasic code for a CR1000X Measurement and Control Datalogger to read the sensor:
Public RRTD Public BomT DataTable (Test,True,1000) DataInterval (0,1,Sec,10) Sample (1,BomT,FP2) EndTable BeginProg Scan (1,Sec,0,0) BrHalf3W (RRTD,1,mV1000,1,Vx1,1,500,True ,0,60,1000,0) PRTCalc (BomT,1,RRTD/1000,1,1.0,0) CallTable Test NextScan EndProg
In case you have some other variation, you can still use the methods outlined here and a good digital handheld multimeter to troubleshoot, just in case. You can also reach out to us by contacting our support staff, and we will be happy to help you.
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