24595_ins_BAPI_4_room_humidity
Installation & Operating Instructions
BAPI-Stat 4 Room Humidity Sensor (BA/
B4
-H200 Series)
Building Automation Products, Inc., 750 North Royal Avenue, Gays Mills, WI 54631 USA
Tel:+1-608-735-4800 • Fax+1-608-735-4804 • E-mail:[email protected] • Web:www.bapihvac.com
rev. 12/15/17
Specifications subject to change without notice.
Diagnostics
5 of 5
Possible Problems:
Possible Solutions:
General troubleshooting • Determine that the input is set up correctly in the controller's and building automation
software.
• Check wiring at the sensor and controller for proper connections.
• Check for corrosion at either the controller or the sensor. Clean off the corrosion, re-strip the
interconnecting wire and reapply the connection. In extreme cases, replace the controller,
interconnecting wire and/or sensor.
• Label the terminals that the interconnecting wires are connected to at the sensor end and the
controller end. Disconnect the interconnecting wires from the controller and the sensor. With
the interconnecting wires separated at both ends measure the resistance from wire-to-wire
with a multimeter. The meter should read greater than 10 Meg-ohms, open or OL depending
on the meter you have. Short the interconnecting wires together at one end. Go to the other
end and measure the resistance from wire-to-wire with a multimeter. The meter should read
less than 10 ohms (22 gauge or larger, 250 feet or less). If either test fails, replace the wire.
Incorrect Humidity
• Check power supply/controller voltage supply
• Disconnect sensor and check power wires for proper voltage (see specifications page)
• Check all software parameters
• If available, check the sensor against a calibrated instrument such as a hygrometer
• Determine if the sensor is exposed to an external environment different from the room
(conduit draft)
Incorrect Temperature
• Determine that the temperature sensor's wires are connected to the correct controller input
terminals, and check the wires at the sensor and controller for proper connections.
• Determine if the sensor is exposed to an external environment different from the room
(conduit draft)
• Measure the physical temperature at the sensor's location using an accurate temperature
standard. Disconnect the temperature sensor's wires (Terminals SEN1 & SEN2) and
measure the temperature sensor's resistance across the output pins. Put the ohmmeter black
lead on SEN2 and the red lead on SEN1. Compare the temperature sensor's resistance to
the appropriate Sensor Resistance Table on the BAPI website (See below). If the measured
resistance varies from the table by more than 5%, call BAPI technical support.
How to Find The Temperature Sensor Resistance Table
Find BAPI's web site at www.bapihvac.com; click on “Resource Library” and “Sensor Specs”
and then click on the sensor type you have.
Specifications
Power:
15 to 35 VDC for 4 to 20 mA Output
10 to 40 VDC or 12 to 24 VAC for 0 to 5 VDC Output
15 to 40 VDC or 15 to 28 VAC for 0 to 10 or 2 to 10 VDC Output
(AC Power requires a separate pair of shielded wires)
Power Consumption:
20 mA max. for 4 to 20 mA Output
4 mA max. for 0 to 5 VDC and 0 to 10 or 2 to 10 VDC Output
0.1 VA max. for 0 to 5 VDC and 0 to 10 or 2 to 10 VDC Output
Sensing Elements:
Temperature - Thermistor, RTD or Semiconductor
±0.3°C (±0.54°F) @ 20 to 40°C (68 to 104°F)
Humidity - Capacitive Polymer
±2%RH @ 25°C (77°F), 20 to 80%RH
Wiring:
2 to 6 pair of 16 to 22 AWG
Field Calibration:
Potentiometer (R34), ±5% in 0.1%
increments
(Units are factory calibrated)
Terminals:
Cage clamp, 16 to 22 AWG
Mounting:
2”x4” J-box or drywall - screws provided
Environmental Operation Range:
Temperature: 32 to 122 °F (0 to 50 °C)
Humidity: 0 to 95%, non-condensing
Material & Rating:
ABS Plastic, UL 94, V-0
Agency:
RoHS, CE*
*Units with passive Thermistors 20KΩ and smaller are
CE compliant.
