Cable extension PT-104 logger

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EelcoS
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Joined: Wed Sep 12, 2018 7:40 am

Cable extension PT-104 logger

Post by EelcoS » Wed Sep 12, 2018 7:46 am

We have a PT-104 logger with four SE012 probes.
For a certain measurement I need to do, the cable length of the probes (2m) is a little bit too short (4m needed).
Is there any option to extend the cable length with a few meters, e.g. a standard extension cable?
Does cable extension have significant impact on the measurement accuracy?

Gerry
PICO STAFF
PICO STAFF
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Joined: Mon Aug 11, 2014 11:14 am

Re: Cable extension PT-104 logger

Post by Gerry » Wed Sep 12, 2018 12:12 pm

Hi EelcoS,

If you contact our helpdesk at support@picotech.com, we can order a cable extenders for you.

The extenders will have a negligible effect on the accuracy of the Probes as they are 4 wire probes.

Ordinarily though, (e.g. for 2-wire PT1000 Probes) an extension of the cable will have an impact on the accuracy as the sensor element itself is effectively a 100 resistor (at 0.01°C) and only changes a tiny amount for a comparatively large change in temperature. So, even a small addition of resistance to the measurement, which is easy to create with a lead extension, will make a significant enough change in the temperature measurement. However using a 4-wire PT100 Probe enables the PT-104 data logger to gauge how much extra resistance the connecting lead adds to the resistance of the sensor element, and adjust the calculation to compensate.

Regards,

Gerry
Gerry
Technical Specialist

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