BAPI Temperature Transmitters Catalog Page

Temperature Transmitters
Installation & Operating Instructions
9518_ins_txmtr
rev. 10/12/15
Termination
BAPI recommends using twisted pair of at least 22AWG and sealant lled connectors for all wire connections. Larger gauge wire may be required for long runs. All wiring must comply with the National Electric Code (NEC) and local codes. Do NOT run this device’s wiring in the same conduit as AC power wiring of NEC class1 or NEC class 2, NEC class 3 or with wiring used to supply highly inductive loads such as motors, contactors and relays.
BAPI’s tests show that uctuating and inaccurate signal levels are possible when AC power wiring is present in the same conduit as the signal lines.
BAPI recommends wiring the product with power disconnected. Proper supply voltage, polarity, and wiring connections are important to a successful installation. Not observing these recommendations may damage the product and will void the warranty.
Fig. 1: Typical 4 to 20mA RTD Transmitter w/ Flying Leads
Fig. 3: Typical 4 to 20mA Thermistor Transmitter
Fig. 2: Typical 4 to 20mA RTD Transmitter w/ Terminals
Fig. 4: Typical Thermistor Voltage Transmitter
Junction Box (JB) Mounting
The Junction Box mount is intended for indoor mounting in equipment rooms, plenums or occupied spaces. Fig. 6 shows a typical Junction Box mounting in an air duct. BAPI recommends using #8 sheet metal screws that need 1/8” pilot holes to attach the sensor to the duct.
After placing the sensing element in the duct, secure the mounting ange to the duct; center the plastic tting holding the probe in the mounting hole. Make sure that the foam seals the hole; do not over tighten the screws.
Fig. 5: Junction Box Duct
Mounting Holes
Fig. 6: Junction Box Duct Installation
Specications subject to change without notice.
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Temperature Transmitters
Installation & Operating Instructions
9518_ins_txmtr
rev. 10/12/15
BAPI-Box (BB) Mounting
The BAPI-Box Enclosure is watertight and carries an IP66 rating (similar to a NEMA 4X rating) when the included screws are fastened on the latch. The BAPI-Box is made of high impact, UV-resistant polycarbonate and features a hinged cover with multiple knockouts. It is available for the full line of BAPI temperature sensors.
Duct Mounting
Mount the unit to its mounting surface with four #10 screws through the holes in the mounting feet. #10 sheet metal screws require 5/32” (4mm) pilot holes. For concrete or cinder block, drill four 5/32” (4mm) holes, 1-3/4” (45mm) deep. Make sure that all screws are started in their holes before tightening evenly. If unit has a foam gasket, only squeeze to about 1/2 of its original thickness. Be sure to seal conduit connector threads and holes in mounting surface to maintain the integrity of the box.
Outside Mounting
The sensor must be mounted in the shade away from building windows, doors or vents. The ideal shaded location in the Northern hemisphere is on the North side of
Fig 6: BAPI-Box enclosure
mounting holes, rotate 90°
for horizontal mount
the building. In the Southern hemisphere the South side of the building is ideal. The probe should point down and the unit should mounted between 4 feet above the ground/roof and one foot minimum below the eave.
Drill the mounting holes and mount as shown in the Fig. 9. Snug the mounting screws to compress the foam back­ing to about 50% of its original thickness to make a good seal to the wall surface. Route the wires into the box and terminate with sealant lled connectors. Best practice is to caulk the wiring hole after the wiring is installed. Close the cover of the BAPI-Box and secure with provided cover screws.
Fig 7: BAPI-Box Duct Horizontal Installation
Fig 8: BAPI-Box Duct
Vertical Installation
Weatherproof (WP) Enclosure Mounting
The weatherproof enclosure is intended for outdoor or equipment room mounting. Use the mounting tabs provided to mount the enclosure as shown in gures 10-13. DO NOT drill screw holes through the back wall of the box. This destroys the integrity of the box and may void the warranty.
Duct Mounting
BAPI recommends using #8 sheet metal screws that need 1/8” pilot holes to attach the sensor to the duct.
After placing the sensing element in the duct, secure the mounting tabs to the duct; center the plastic tting holding the probe in the mounting hole. Be
Continued on next page...
Specications subject to change without notice.
Fig. 10: Weatherproof
Enclosure mounting holes
Fig 9: BAPI-Box Outdoor Air
Installation
Fig. 11: Weatherproof
Enclosure Mounting Tabs
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Temperature Transmitters
Installation & Operating Instructions
9518_ins_txmtr
rev. 10/12/15
Weatherproof (WP) Enclosure Mounting continued...
sure that the foam seals the hole; do not over tighten the screws. Place the foam gasket between the cover and the
box before securing the cover in place with the screws provided. T
o keep water out of the box, be sure to coat the
threads of the box plugs or conduit connectors with caulk before screwing them into the enclosure.
Outside Mounting
The sensor must be mounted in the shade away from building windows, doors or vents. The ideal shaded location in the Northern hemisphere is on the North side of the building. In the Southern hemisphere the South side of the building is ideal. The probe should point down and the unit should mounted between 4 feet above the ground/roof and one foot minimum below the eave.
Drill the mounting holes and mount as shown in the Fig. 13. Snug the mounting screws to compress the foam backing to about 50% of its original thickness to make a good seal to the wall surface. Route the wires into the box and terminate with sealant lled connectors. Best practice is to caulk the wiring hole after the wiring is installed. Close the cover of the enclosure and secure with provided cover screws.
Note: Air temperature units are shown. Temperature and humidity units are available in doublegang weatherproof enclosures only.
Fig. 12: Weatherproof
Enclosure Duct Installation
Fig. 13: Weatherproof
Enclosure Outside Installation
Weather Tight (EU) Enclosure Mounting
The Weather Tight (EU) Enclosure is available in ABS plastic for indoor applications and UV­light stabilized plastic for outdoor applications.
Duct Mounting
Figure 15 shows a typical Weather Tight enclosure mounting in an air duct. BAPI recommends using #8 sheet metal screws that need 1/8-inch pilot holes. After placing
the sensing element in the duct, secure the mounting feet to the duct; center the plastic tting holding the probe in the mounting hole.
Fig. 14: Weather Tight
Enclosure Mounting Holes
Do not over tighten the screws but be sure that the foam insulation makes an airtight seal. Tighten the lid to two clicks when you are nished making terminations.
Outside Mounting
The sensor must be mounted in the shade away from building windows, doors or vents. The ideal shaded location in the Northern hemisphere is on the North side of the building. In the Southern hemisphere the South side of the building is ideal. The probe should point down and the unit should mounted between 4 feet above the ground/roof and one foot minimum below the eave.
Drill the mounting holes and mount as shown in the Fig. 9. Snug the mounting screws to compress the foam backing to about 50% of its original thickness to make a good seal to the wall surface. Route the wires into the box and termi­nate with sealant lled connectors. Best practice is to caulk the wiring hole after the wiring is installed. Tighten the lid to two clicks when you are nished making terminations.
Fig. 15: Weather Tight
Enclosure Duct Installation
Fig. 16: Weather Tight
Enclosure Outside Installation
Specications subject to change without notice.
Temperature Transmitters
Installation & Operating Instructions
9518_ins_txmtr
rev. 10/12/15
Immersion Sensor Mounting
Place the thermowell into the pipe nipple using Teon tape and/or pipe dope. Tighten securely but do not over torque. Insert the immersion sensor into the thermowell with the plastic tting screwing into the opening on the thermowell. Tighten the immersion sensor snugly by hand without too much torque. Make sure that the tip of the immersion sensor is in contact with the bottom of the thermowell. The unit is designed so that the temperature probe moves slightly into the enclosure as the sensor hits the bottom of the well. Fig. 18 shows a Junction Box installation, but Weatherproof, Weather Tight or BAPI-Box enclosures may be used as well.
Fig. 18: Cross section
of an immersion unit
Fig. 17: Transmitter mounted to the cover of a
Weatherproof Enclosure with an immersion probe
installation
Strap Sensor Mounting
Spring-Loaded Straps
The Spring-Loaded Strap Sensor is used when a large section of insulation cannot be removed from a pipe. It accommodates insulation of up to 2” thick and is sized for pipe diameters of 5 to
12.5”, including the insulation.
Cut a 1-1/4” diameter hole in the insulation and remove the insulation from the hole down to the bare pipe. Be sure to remove all insulation and debris from the hole. Place the copper pad on the end of the spring-mounted foam into the hole and make sure it has good physical contact with the pipe. Tighten the straps until the strap­mounting bracket contacts the insulation.
Clamp-On Straps
Place the Clamp-On Strap Sensor on bare pipe, or a section of pipe with the insulation removed. The clamp-on strap sensor is sized for bare pipes of 2 to 4.5” in diameter.
Make sure that the copper pad on the foam is in good physical contact with the pipe. Snug the straps so that the assembly does not rotate around the pipe when moderate pressure is applied to the Junction Box. Do not over tighten. You may place pipe insulation over the whole assembly. Add another pipe clamp if needed. Fig. 20 shows a Junction Box installation, but a BAPI-Box enclosure may be used as well.
Fig. 19: Spring-Loaded Strap installation
Specications subject to change without notice.
Fig. 20: Clamp-On Strap installation
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Temperature Transmitters
Installation & Operating Instructions
9518_ins_txmtr
rev. 10/12/15
Wall Plate Mounting
The Stainless Steel Wall Plate is intended for indoor mounting to a 2x4” Junction Box. Install a Junction Box as shown in the Fig. 21. Terminate your wiring cables to the red and black wires, preferably with sealant lled connectors. Secure the Wall Plate to the Junction Box with the screws provided making sure that the foam gasket on the back of the plate seals to the wall without wrinkling the foam. The plate should not contact the wall.
Fig. 21: Wall Plate Transmitter Installation
Remote Probe Mounting
Mount Remote Probes as shown in the gures below with the wire connector down. Route the temperature probe to the spot where you wish to measure the temperature. Best practice is to tie down the wire every two feet. Make sure to caulk the upper screw-in plug on the Weatherproof enclosure. Center mounting hole shown is only used if you are wiring through the mounting surface.
Fig. 22:
BAPI-Box
(BB)
Installation
Fig. 23: BAPI-Box (BB)
mounting holes
Fig. 24:
Weatherproof
(WP) Enclosure
Installation.
(See Fig. 11 for
Mounting Tab
installation.)
Fig. 25: Weatherproof (WP)
Enclosure mounting holes
Specications subject to change without notice.
Fig. 26:
Weather Tight (EU) Enclosure
installation
Fig. 27: Weather Tight (EU)
Mounting Template
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Temperature Transmitters
Installation & Operating Instructions
9518_ins_txmtr
rev. 10/12/15
Diagnostics
Possible Problems: Possible Solutions:
Unit will not operate. - Measure the power supply voltage by placing a voltmeter across
• the transmitter’s (+) and (-) terminal. Make sure that it matches the drawings above and power requirements in the specications.
- Check if the RTD wires are physically open or shorted together and are terminated to the transmitter.
• Reading is incorrect in the controller. - Determine if the input is set up correctly in the controller and BAS software.
- For a 4 to 20mA current transmitter measure the transmitter current by placing an ammeter in series with the controller input. The current should read according to the “4 to 20mA Temperature Equation” shown below.
- For a voltage transmitter, measure the signal with a volt meter (Orange or Orange/Black to Black). The signal should read according to the “Voltage Temperature Equation” shown below.
Voltage Temperature Equation
T = TLow + (V x TSpan)
VSpan
T = Temperature at sensor
TLow = Low temperature of span
THigh = High temperature of span
TSpan = THigh - TLow
VLow = Low transmitter voltage usually=(0, 1 or 2v)
VHigh = High transmitter voltage usually=(5 or 10v)
VSpan = VHigh - VLow
V = Signal reading in volts
4-20mA Temperature Equation
T = TLow + (A -4) x (TSpan) 16
T = Temperature at sensor
TLow = Low temperature of span
THigh = High temperature of span
TSpan = THigh - TLow
A = Signal reading in mA
Specications subject to change without notice.
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