© Isothermal Technology
Page 30 of 102
923 milliK manual - issue: 1.10
Use the
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keys to select and activate the on-screen buttons to select the channel,
clear the graph, clear the statistics (Numeric Window) set the scales and start/stop logging of
data to a file.
3.4 Using a 4-20mA Transmitter with milliK
The milliK can be used with 4-20mA temperature transmitters by using the 4mm sockets on
the rear of the milliK (designated Channel 3). The centre 4mm socket is the current sense
input to the milliK, the other 4mm sockets are 0V and a +24V supply. Connect the
transmitter between the appropriate 4mm sockets depending on whether it is self-powered or
loop-powered (suitable for a 24V loop supply):
4-20mA
4-20mA
Self-Powered Transmitter
Loop-Powered Transmitter
The 4-20mA system and 24V supply are isolated from both the measurement system of
Channels 1 and 2 and from the digital interfaces in order to optimise immunity to external
(common-mode) noise sources.
