Automation Components ACI/TTU1000 - Manual (Page 6)

2305 Pleasant View Rd. Middleton Industrial Park Middleton, WI 53562
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5. Now make sure that all of the dipswitches are properly configured as per Figures #2, #3, #5, and #6 before
initially powering the unit.
6. Now place the cover onto the unit and gently turn until it is tight. Be careful not to apply too much
pressure when tightening.
7. Now verify that you are getting a humidity reading on your Building Automation System. Please note that
it may take ten to twenty minutes for the sensor reading to stabilize upon initial power up.
Outdoor Mounting Configuration:
The RH transmitter should be mounted so that the unit is under an Eave, Shield or in area that is out of the elements or
direct sunlight. All of the RH sensors have a +/- 3% interchangeability. It is recommended to do a single point
calibration for a much higher accuracy.
1. Place the RH transmitter where it is to be mounted and mark the (2) mounting holes. Two #8 x ¾” self-
tapping TEK screws are included with the installation instruction.
2. Now remove the cover and install your conduit connectors, watertight fittings, and or ½” vent plug. Please
note that the inner ring will knockout first and then the outer ring should be tapped in (1) or (2) locations
with a screwdriver before it can be peeled out. The cover will be connected to the housing by the RH
sensor leads. To remove the RH sensor leads from the housing see Figure #8.
3. Next connect all of the wires to the corresponding terminal blocks and/or flying leads the wires to the
corresponding terminal blocks as shown in Figure #7 and Figure #9.
4. Now make sure that all of the dipswitches are properly configured as per Figures #2, #3, #5, and #6 before
initially powering the unit.
5. Now place the cover onto the unit and gently turn until it is tight. Be careful not to apply too much
pressure when tightening.
6. Now verify that you are getting a humidity reading on your Building Automation System. Please note that
it may take tem to twenty minutes for the sensor reading to stabilize upon initial power up.
Troubleshooting
No reading 1. Check that you have the correct supply voltage at the power terminal blocks.
2. Check wiring configuration and all DIP switch settings are as in Figure #7 and
Figure #9.
3. Verify that the terminal screws are all connected tightly and that all of the wires
are firmly in place.
Erratic readings 1. Verify that all of the wires are terminated properly.
2. Make sure that there is no condensation on the board.
3. Check that the input power is clean. In areas of high RF interference or noise,
shielded cable may be necessary to stabilize signal.
Inaccurate readings 1. If you suspect that the transmitter is not reading within the specified tolerance,
please contact the factory for further assistance.
RH Conversion Formulas
To convert transmitter output signal to %RH.
4-20mA to %RH (4 mA = 0% RH and 20 mA = 100% RH)
Example: 12mA transmitter signal output
(12mA-4mA)/
0.16 = 50% RH
0-5 VDC to %RH (0 VDC = 0% RH and 5 VDC = 100% RH)
Example: 2 VDC transmitter signal output
2 VDC/0.05 = 40% RH
0-10 VDC to %RH (0 VDC = 0% RH and 10 VDC = 100% RH)
Example: 8 VDC transmitter signal output
8 VDC/0.10 = 80% RH