DI-8B42-01 4-20mA Current Loop Transmitter Workaround
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Readings in WinDaq appear erratic when attempting to acquire data from a 2-wire transmitter using a DI-8B42-01 module.
Rarely, the DI-8B42-01 module could go into oscillation with certain transducers.
To resolve these issues follow the steps below.
The transmitter should be connected across Ex+ and In+.
If your connections are correct; place a 0.02µF ceramic disc capacitor between In+ and Ex+.
DI-718B(x), DI-788 and DI-78B input expanders containing DI-8B42-01 modules.