Unitemp Blog

Can displacement transducers be repaired?
11.01.2016

Wiper replacement can be facilitated for certain potentiometers. Kindly contact for further details & request support.

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My previous potentiometer had a resistor value of 10k - is it safe to use a displacement transducer with a 5kΩ resistor value?
11.01.2016

Yes. A displacement transducer is a voltage divider (not a variable resistor) so resistive value is of little importance
unless the data acquisition system has specific requirements. Be careful however to observe the power supply
capabilities to define maximum absorbed current.

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Displacement transducer: The potentiometer is not linear
11.01.2016

Linearity is greatly influenced by the input impedance value - so this is vital for considered applications.
For example, whilst it is theoretically possible to connect a potentiometer to a , say 0-10Vdc, input of a PLC, the input impedance value of of the PLC must be considered.

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40B indicator displaying 'Hi or Lo, Er' when connected to a 3.33mV/V strain gauge.
23.12.2015

This is usually an indication that the input sensor signal is out of range. Note: a 'calibration'/adjustment is always required when new pressure sensors are connected to indicator.

4-wire solution

  1. Press and hold the button until 'In' is...
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Can I use a 4/40T indicator to supply a MK4 linear transducer?
22.12.2015

No. The MK4 transducer draws 70/90mA, but the maximum current supplied by the 4/40T is 50mA at 24V.
40BX-X-24-X-X-X-X-X may be used.

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Can I use a 4/40T indicator to measure the output of a LTM displacement transducer?
22.12.2015

Yes, but only the special version: 40TX-X-0.1/10-XX-XX-X-X-X R77

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Gefran indicators: Do you have a display that can indicate more than one zone?
22.12.2015

(thermocouple, resistance sensor, voltage and current)

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Gefan indicators: How can I simulate a sample weight or pressure?
22.12.2015

A sample weight/pressure can be simulated with a mV or analogue signal from a signal generating device.

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Gefran indicators: What does resolution mean?
22.12.2015

In this case, the resolution is an indication of the smallest quantity that can be measured.

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Controller display doesn't switch on after being powered?
18.12.2015

There is a possibility that the controller is faulty/blown. Kindly download a customer request form, complete and send to Thermon SA (Pty) Ltd. for a quote on repair.

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