Thermo Fisher Scientific Alpha CON 100 - Manual (Page 23)

20
7. Using the Controller Current Loop
for Datalogging (for Transmitter
Model Only)
The 4-20 mA Current Loop
A 4-20 mA current loop can be connected if a remote data
logging is required. The current will be proportional to the
Conductivity displayed on the panel display. The 4-20 mA
current loop can drive a load resistance of no more than 200
Ω .
If the calculated Conductivity is less than 0 uS (due to incorrect
TC and temperature setting), the current will be set to
approximately 0 mA. If Conductivity exceeds the value that can
be measured in the range, current will be set to approximately
21 mA. In this way, the remote data logger can detect when out
of range conditions arise. Please note that the 4-20 mA loop is
not galvanically isolated from the source.