25
8
RELAYS
The Alpha COND 200 features two SPDT non-powered relays; rated for 6A at 110
VAC, 250 VAC maximum. When your process exceeds the set parameters of a
relay set point, the REL 1 or REL 2 indicator lights up.
To set parameters for relay one and relay two, see Setup programs P1.0 and P2.0.
9
TRANSMITTER FUNCTION
If remote data logging is required, a 4-20 mA current loop can be connected. The
current will be proportional to the Conductivity value displayed on the panel and
according to the measurement range selected.
Conductivity Range
Range No., R
Cell Constant
4 mA current
20 mA current
0.00 – 20.00 µS/cm
1
0.1
0.00 µS/cm
20.00 µS/cm
0.0 – 200.0 µS/cm
2
0.1
0.0 µS/cm
200.0 µS/cm
0.0 – 200.0 µS/cm
3
1
0.0 µS/cm
200.0 µS/cm
0 – 2000 µS/cm
4
1
0 µS/cm
2000 µS/cm
0.00 – 10.00 mS/cm
5
1
0.00 mS/cm
10.0 mS/cm
0.00 – 20.00 mS/cm
6
1
0.00 mS/cm
20.0 mS/cm
0.0 – 200.0 mS/cm
7
1
0.0 mS/cm
200.0 mS/cm
0.0 – 200.0 mS/cm
8
10
0.0 mS/cm
200.0 mS/cm
The 4-20 mA current loop can drive a load resistance of no more than 200
Ω
.