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Why would I need to use the XPS switch?
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If you need to monitor data in a remote area where there is no available power, the XPS switch will help you use a battery to power (excite) your 4-20mA transducer efficiently and for extended periods of time.
If you didn't use the XPS switch in this type of application, your transducer circuit would either run out of power rapidly, or require a very large battery.
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Why is the XPS feature only available for 4-20mA transducer loops?
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A key advantage of 4-20mA transducers is that they are "voltage independent" which means they provide the same accuracy of output within a range of battery voltage levels. This is important especially since batteries decrease in voltage as they get older.
Many voltage output (usually millivolt) transducers have an output that is ratiometric to the input voltage received. This means that, as the battery excitation voltage decreases, transducer error increases.
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Can I use the XPS switch with voltage output transducers?
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Yes, but you will need to use the SP-4000 model (with four inputs) data logger and add some external circuitry. Contact Veriteq for circuit requirement details.
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Where can I get help setting up my XPS and transducer circuit?
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Right here. Contact the Veriteq applications support line and be ready to provide information on the transducer you are using, or are considering.
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Frequently Asked Questions 