Nace CP 1 - Alternative Instrument Connection; Instrument Connections

TM0497-2002
6 NACE International
-
DC
VOLT
COM
+
-
0.850
+
Pipe Test Lead
Voltmeters
+
-
Direction of meter current
+
Reference
Electrode
C
L
Electrode potential
does not vary
Pipe potential
is the variable
Pipe
0
1
Figure 1a
Instrument Connection
Pipe Test Lead
Voltmeter
+
-
Direction of meter current
Reference
Electrode
C
L
Electrode potential
does not vary
Pipe potential
is the variable
Pipe
DC
VOLT
COM
-
-
0.850
+
Figure 1b
Alternative Instrument Connection
FIGURE 1
Instrument Connections