WARRANTY
The ACI Current Switch Series are covered by ACI’s Five (5) Year Limited Warranty, which is located in the front of
ACI’S SENSORS & TRANSMITTERS CATALOG or can be found on ACI’s website: www.workaci.com.
W.E.E.E. DIRECTIVE
At the end of their useful life the packaging and product should be disposed of via a suitable recycling
centre. Do not dispose of with household waste. Do not burn.
CALIBRATION OF ADJUSTABLE TRIP POINT
The adjustable current switch has an operating range of 0-150 Amps. Do not exceed! The adjustable current
switch comes with its fifteen-turn adjustment potentiometer set to the 100 Amp trip point position. The
adjustable current switch can be used to monitor Under Load, Normal Load, and Over Load conditions,
depending on how it’s set. The procedure below is for the Normal load condition for part numbers A/MCS-A &
A/MSCS-A.
NORMAL LOADS
With current flowing through the aperture of the A/MCS-A and A/MSCS-A current switches, first verify that
the Blue LED is on. If the Blue LED is on, now slowly adjust the potentiometer clockwise until the Red LED
just turns on and stop immediately. This will set the trip point at your normal operating load current.
If the RED LED is on after initial power up, this means that you will need to slowly adjust the potentiometer
counter-clockwise until the Blue LED turns on and then slowly adjust the potentiometer clockwise until the
Red LED just turns on and stop immediately. The adjustable current switch is now tripped. Now verify the
output with an Ohmmeter to verify that the contacts of the switch are approximately 0.200 Ohms. The
adjustable current switch Hysteresis (Dead Band) is typically 10% of the trip point.
Clockwise = Decrease Trip Point
Counter-clockwise = Increase Trip Point
TROUBLESHOOTING
PROBLEM
Current switch didn’t activate (Test #1)
Current switch didn’t activate (Test #2)
SOLUTION(S)
Disconnect the wires from the current switch output. Measure the resistance
across the contacts with an Ohmmeter. See
Standard Ordering Table (p.5)
for
the actual resistance readings for an open or closed switch reading.
Verify that the current flowing in the conductor being monitored is above
the fixed trip point as listed in the operating specifications. If the sensor is
monitoring less than the fixed trip point, see
Figure 3
.
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone:
1-888-967-5224 |
Website:
workaci.com
Page 4
Version: 6.0
I0000558
ACI Model #
Resistance if switch open Resistance if switch closed
A/MCS-A
Greater than 1 Meg ohms
Approximately 0.2 ohms
A/MSCS-A
Greater than 1 Meg ohms
Approximately 0.2 ohms
