Expert’s answer: Operating voltage of an Emerson 3051 wireless transmitter

Hmmm, it’s odd that the product literature doesn’t mention the operating voltage of an Emerson 3051 wireless transmitter. Well, the nominal voltage for the 3051S is 7.2 VDC, where the transmitter uses the 701PBK module. It has a diagnostic to verify the battery level. Yellow warns you that you need to replace the power module soon. The warning occurs below 6.0 volts, and the device will stop measuring below 5.2. The 3051 (no S) model uses a 701GN, and the nominal voltage is 3.6, the warning 3.25, and the failure 2.45.

Operating voltage of an Emerson 3051 wireless transmitter
Power Module

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