Analog output level test - HMT370EX

HMT370EX User Guide

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If you need to verify that the signal from the HMT370EX transmitter's analog output channel is correct, you can force the output of the channel to a specific value and measure the output level with a multimeter.

The analog output level tested can be carried out either with the local display interface or using Vaisala Insight PC software.

Figure 1. Multimeter test point overview

The transmitter body enclosure must not be opened in an explosion hazardous area, unless a safe work permit has been issued in accordance with the standard IEC 60079-14. Either remove the transmitter from the hazardous area before opening the enclosure, or ensure that an IEC 60079-14 compliant safe work procedure has been implemented in the hazardous area.

Always use an Ex compliant multimeter. The output parameters of the multimeter must be compatible with the input parameters of the transmitter.