3
8850-2 Conductivity/Resistivity Transmitter
3.2 System Power/Loop Connections
-
+
4
3
2
1
4
3
2
1
-
+
4
3
2
1
+
-
+
-
-
+
4
3
2
1
4
3
2
1
4
3
2
1
+
-
-
+
-
+
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
Channel 2
4-20 mA in
Stand-alone application, no current loop used
(NOTE: AUX power must be connected to the power supply for the relays to function.)
Transmitter
Terminals
Power
Supply
12-24 VDC
Connection to a PLC with built-in power supply
Internal
PLC Connection
Connection to a PLC/Recorder, separate supply
Example: Two transmitters connected to PLC/Recorder with separate power supply
PLC or Recorder
Loop Input
4-20 mA
System Pwr Loop -
System Pwr Loop +
AUX Power -
AUX Power +
Transmitter
Terminals
Power
Supply
12-24 VDC
System Pwr Loop -
System Pwr Loop +
AUX Power -
AUX Power +
AUX power required for all 8850-2 systems
PLC or Recorder
Channel 1
4-20 mA in
Transmitter 1
Terminals
System Pwr Loop -
System Pwr Loop +
AUX Power -
AUX Power +
Transmitter 2
Terminals
PLC Terminals
Loop Input
4-20 mA
Transmitter
Terminals
System Pwr Loop -
System Pwr Loop +
AUX Power -
AUX Power +
Power
Supply
12-24 VDC
Power
Supply
12-24 VDC
System Pwr Loop -
System Pwr Loop +
AUX Power -
AUX Power +
Red
Black
Red
Black
Black
Red
Black
Black
Red
Black
Black
Black
Select the sensor with the range that best suits your application
requirements.
• 2818, 2819-1, 2839-1 (0.01 cell): 0.01 to 100
μ
S
(10
k
Ω
to 100 M
Ω
)
Use the 2818, 2819-1 or the 2839-1 for all resistivity requirements.
• 2820-1, 2840-1 (0.1 cell):
1 to 1000
μ
S
• 2821-1, 2841-1 (1.0 cell):
10 to 10,000
μ
S
• 2822-1, 2842-1 (10.0 cell):
100 to 200,000
μ
S
• 2823-1 (20.0 cell):
200 to 400,000
μ
S
1
μ
S
1 M
10
μ
S
100 K
1,000
μ
S
10,000
μ
S
50,000
μ
S
200,000
μ
S
100
μ
S
10 K
400,000
μ
S
100,000
μ
S
0.054
μ
S
18.3 M
3-2818, 3-2819, 3-2839
3-2820, 3-2840
3-2821, 3-2841
3-2822, 3-2842
3-2823
0.010
μ
S
100 M
200
μ
S
(0.01 Cell)
( 0.10 Cell)
(1.0 Cell)
(10.0 Cell)
(20.0 Cell)
Bottled
Water
Brackish Sea Water
(Salinity)
UPW @ 25°C
USP
Cooling Tower
Waste Waters
Deionization Regen. Chemicals
Alkali Cleaners, Acids/Bases
Rinse
Water