Figure # 5 output selection switches (sw3), Test and calibration switch settings (sw2), Figure # 6 – Automation Components ACI/RH Duct ACI and Outside Series User Manual
Page 3: Figure # 4 figure # 8
2305 Pleasant View Rd. Middleton Industrial Park Middleton, WI 53562
PH: (608) 831-2585 FAX (608) 831-7407
I0000145.DOC Rev 3
Decrement RH Output - This DIP switch will allow you to calibrate the sensor through the software. The switch
must be toggled from the Off to the On position and then returned to the Off position for a
decrease of 0.5% RH. This means that if your humidity has drifted 1% over a certain time
period, you will be able to toggle the Decrement RH Output switch 2 times in order to
slide the whole curve downward. Note: This is only a single point calibration, and is not
recommended for critical applications. Please contact the factory before doing any
field calibration.
Reset to Original Calibration - Both the Increment and the Decrement DIP switches should be turned on for a
minimum of 5 seconds before turning them both off again. This will allow you to reset
the transmitter back to the original factory calibration.
RH Duct and Outside Wiring Diagram (For Combination Units and NEMA Rated Enclosures)
ACI recommends that the ACI/RH 4-20 mA Duct and Outside relative humidity transmitters be wired with a two-wire,
16-22 AWG twisted pair or shielded cable for best results. All ACI/RH Duct and Outside voltage output or AC powered
current output transmitters should be used with a 3-wire, 16-22 AWG shielded cable. 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.
1
2
3
4
ON
4
5
6
3
2
ON
1
SW2
SW3
J2
4-20
GND
VDC
Vout
Relative Humidity Sensor
(Polarized Male Connector
See Figure #8 above)
Span Adjust
Potentiometer
Zero Adjust
Potentiometer
Red Wire
BLK Wire
Green Wire
DC Power
AC Power
2
2
Figure # 5
Output Selection Switches (SW3)
4-20mA Out
4-20mA Out
3
4
4
3
AC/DC Power
AC/DC Power
0-10 VDC
0-5 VDC Out
ON
1
ON
1
4
4
3
3
ON
2
2
1
1
ON
Test and Calibration Switch Settings (SW2)
100% RH Output
50% RH Output
0% RH Output
Figure # 6
6
6
6
5
4
5
5
4
4
Normal Operating Condition
Reset to Original Calibration
Decrement RH Output
Increment RH Output
ON
ON
ON
3
2
3
3
2
2
6
1
5
1
1
4
3
2
1
ON
4
4
4
5
6
5
5
6
6
3
2
3
3
2
2
ON
1
ON
1
1
ON
Figure # 4
Figure # 8
J2
Push tab in and pull up on the Sensor
cable to remove from J2 Connector
J3
For ACI programming use only !
R
e
d
B
la
ck
G
re
en