US and Canada 800.683.2378, International 904.641.1666
S Series FW 3.02.02
77
CONNECTIONS
continued
Strip / Chart Recorder
PLC / DCS
(+4-20mA Output) CN405-5
(-4-20mA Output) CN405-5
(-4-20mA Signal) CN406-2
(+4-20mA Signal)
CN406-5
Panel Meter
ADC
(+)
(–)
(–) (+)
(+) (–)
Powered 4-20mA
Transmitter
+
–
(+)
(–)
PLC / DCS
pH Meter
Power Supply
+
–
Powered 4-20mA
pH Meter
pH
+
–
+
–
Process Meter
Pump Injection Point
4-20mA OUTPUT
page 2 of 2
CALIBRATING 4-20mA OUTPUT
The 4-20mA output will produce a signal that
corresponds to the speed percentage that the
pump is running (4mA=0% pump speed &
20mA=100% pump speed).
To calibrate the output loop – navigate to the
signal calibration selection in the configuration
menu – with the pump installed – place a
process or a multimeter in the loop.
NOTE: When entering this menu the output is
activated only when the value is changed by
pressing the up or down arrows.
Adjust the value in the “4mA out set” menu to
indicate 4mA in the process loop and press
enter. this is the zero adjustment parameter.
Next adjust the value in the “20mA out set” menu
to indicate 20mA in the process loop and press
enter. this is the span adjustment parameter.
Go to manual mode. set the pump speed at
100%. note the difference between the current
loop value and 20mA – return to the output
signal calibration menu and readjust (add or
subtract) the output level by the difference noted.
Verify the process loop by setting the pumps
speed to 25%, 50%, & 75%. the loop current
should be 8mA, 12mA, & 16mA respectively.
