WARRANTY
The ACI Immersion Series temperature sensors 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.
TROUBLESHOOTING
PROBLEM
Sensor reading is incorrect
Sensor reads infinity/very high resistance
Sensor reads low resistance
Erratic readings
SOLUTION(S)
•
Verify sensor wiring to controller is not damaged and has continuity.
•
Verify sensor or wires are not shorted together.
•
Verify controller is setup for correct sensor curve.
•
Disconnect wires from sensor terminal block, tighten terminal block
screws down, and take a resistance (ohm) reading with a multimeter.
•
Compare the resistance reading to the Temperature Vs Resistance
Curves online:
http://www.workaci.com/content/thermistor-curves-0
•
Verify proper mounting location to confirm no external factors are
affecting reading.
•
Sensor or wires are open.
•
Sensor or wires are shorted together.
•
Condensation on PCB board
•
Bad wire connections.
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone:
1-888-967-5224 |
Website:
workaci.com
Page 3
Version: 1.0
I0000811
WIRING INSTRUCTIONS
Open the cover of the enclosure. ACI recommends 16 to 26 AWG twisted pair wires or shielded cable for
all sensors. Signal wiring must be run separate from low and high voltage wires (24/120/230VAC). All ACI
thermistors and RTD temperature sensors are both non-polarity and non-position sensitive. All
thermistor type units are supplied with (2) flying lead wires, and all RTD’s are supplied with (2) or (3)
flying lead wires – see
FIGURE 6
(below). The number of wires needed depends on the application.
Connect thermistor/RTD wire leads to controller analog input wires using wire nuts, terminal blocks, or
crimp style connectors. All wiring must comply with all local and National Electric Codes. After wiring,
attach the cover to the enclosure.
Note:
When using a shielded cable, be sure to connect only (1) end of the shield to ground at the controller.
Connecting both ends of the shield to ground may cause a ground loop. When removing the shield from
the sensor end, make sure to properly trim the shield to prevent any chance of shorting.
Note:
If the controller requires a (2) wire input for a RTD, connect the (2) common wires(same color)
together. If the controller requires (3) wires, use (3) individual wires.
THERMISTOR OR
RTD 2WIRE
WIRE NUT
RTD 3WIRE
SAME COLOR WIRES
WIRE NUT
WIRING FROM CONTROLLER
ANALOG INPUT
WIRING FROM CONTROLLER
ANALOG INPUT
3-WIRE RTD WIRING
2-WIRE THERMISTOR or RTD WIRING
FIGURE 7:
TEMPERATURE WIRING
