Omega Thm-Bullet-Probe User guide

BULLET PROBE/ PIPE MOUNT
SERIES

Installation & Operation Instructions

Phone: [phone]

Website: workaci.com

PRECAUTIONS

• DO NOT RUN THE WIRING IN ANY CONDUIT
WITH LINE VOLTAGE (24/120/230 VAC).

GENERAL INFORMATION

The Bullet Probe features a one inch stainless steel
probe that is designed for use with electronic
controllers in commercial heating and cooling
building management systems. It is available with
multiple thermistor or RTD options. The bullet style
sensor monitors air temperatures and should not be
fully submerged in water.

For optimal temperature measurement, follow
these tips:

• Do not install on external walls.

• Avoid air registers, diusers, vents, and windows.

• Eliminate and seal all wall and conduit penetrations. Air

migration from wall cavities may alter temperature
readings.

• Do not install near heat sources. eg: lamps,
radiators, direct sunlight, copiers, chimney walls,
walls concealing hot-water pipes.

MOUNTING INSTRUCTIONS

Bullet Probe sensors may be mounted using a 1/4”
mounting clip (ACI Item #108169) on walls or with
cable ties along pipes. ACI’s Pipe mount Series is
recommend for pipes from ½” (12.7mm) to 1”
(25.4mm). The Bullet Probe may still be used, but the
Pipe Mount has small curvature on the bottom that is
designed to increase the surface area and improve the
thermal conductivity between the pipe and the
sensor.

FIGURE 1: BULLET PROBE (-BP)
DIMENSIONS

0.25”

(6.35 mm)

1.00”

(25.40 mm)

23.00”

(584.20 mm)

0.65”

0.25”

(6.35 mm)

(16.51 mm)

FIGURE 2: PIPE MOUNT (-PM)
DIMENSIONS

1.10”

(27.94 mm)

BULLET PROBE (-BP) ASSEMBLY ON WALL

Take care when mounting. Check local code for
mounting height requirements. The sensor should
be mounted in an area where air circulation is well
mixed and not blocked by obstructions. To x the BP
on a wall, ACI recommends a height of 48-60” (1.2-1.5
m) o the ground and at least 1.5’ (0.5 m) from the
adjacent wall. Slide the sensor probe through the
mounting clip - see FIGURE 3 (p. 2). Drill a 1/4” screw
through the socket and tighten to the wall.

Automation Components, Inc.

2305 Pleasant View Road | Middleton, WI 53562

Phone: [phone] | Website: workaci.com

Page 1

TOP VIEW

0.38”

(9.53 mm)

2.00”

(50.80 mm)

Version: 3.0

I0000815

0.31”

(7.87 mm)

PIPE MOUNTING

For best accuracy and increased thermal conduc­tion between the pipe and the sensor, ACI
recommends to clean the pipe with an emery
cloth or le, before applying thermal grease. Be
sure to insulate the probe (from the eects of the
ambient air) after tightly fastening to the pipe.

BULLET PROBE (-BP) ASSEMBLY ON PIPE

To x the BP sensor along a pipe, use cable ties to
mount the sensor probe and wires on the pipe ­see Figure 4 (middle).

PIPE MOUNT (-PM) ASSEMBLY ON PIPE

For mounting along a small pipe with
maximum 1” (25.4 mm) diameter, align the
contoured PM sensor to the pipe and fasten
with cable ties - see FIGURE 5 (below).

FIGURE 3: BULLET PROBE

BULLET PROBE

1/4” MOUNTING CLIP

FIGURE 4: BULLET PROBE (-BP)

ASSEMBLY

INSULATION ADDEDBARE ASSEMBLY

BULLET PROBE

CABLE TIE

PIPE

CABLE TIE

BULLET PROBE

INSULATION ADDED
TO COVER BULLET PROBE

WIRING INSTRUCTIONS

ACI recommends 16 to 26 AWG twisted pair
wires or shielded cables for all sensors. Signal
wiring must be run separate from low and high
voltage wires (24/120/230 VAC). All ACI
thermistors and RTD temperature sensors are
both non-polarity and non-position sensitive.
All thermistor type units are supplied with (2)
ying lead wires, and all RTD’s are supplied with
(2) or (3) ying lead wires – see FIGURE 6 (right).
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.

FIGURE 5: PIPE MOUNT (-PM)
ASSEMBLY

PIPE

PIPE MOUNT
SENSOR

MAX 1” (25.4 mm)
DIAMETER PIPE

CONTOURED SURFACE OF
SENSOR FITTED TO PIPE

PIPE MOUNT SENSOR

CABLE TIES

FIGURE 6: TEMPERATURE WIRING

2-WIRE THERMISTOR or RTD WIRING

THERMISTOR OR

RTD 2WIRE

3-WIRE RTD WIRING

RTD 3WIRE

WIRE NUT

SAME COLOR WIRES

WIRE NUT

MAX 1” (25.4 mm)
DIAMETER PIPE

WIRING FROM CONTROLLER

ANALOG INPUT

WIRING FROM CONTROLLER

ANALOG INPUT

Automation Components, Inc.

2305 Pleasant View Road | Middleton, WI 53562

Phone: [phone] | Website: workaci.com

Page 2

Version: 3.0

I0000815

WIRING INSTRUCTIONS (Continued)

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.

TROUBLESHOOTING

PROBLEM

Sensor reading is incorrect

Sensor reads innity/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 conrm no external factors are

aecting reading.

• Sensor or wires are open.

• Sensor or wires are shorted together.

• Condensation on PCB board

• Bad wire connections.

WARRANTY

The ACI Bullet Probe 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.

W.E.E.E. DIRECTIVE

At the end of their useful life the packaging and product should be disposed of via a suitable recycling
centre. Do not dispose of with household waste. Do not burn.

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Automation Components, Inc.

2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com

Version: 3.0

I0000815

PRODUCT SPECIFICATIONS

SENSOR NON-SPECIFIC INFORMATION

Number Sensing Points:

Operating Humidity Range:

Plate Material:

Wire Size

THERMISTOR

Operating Temperature Range:

Storage Temperature Range:

Sensor Output @ 25 °C (77 °F):

(Lead Wire Colors)

*Does not include CL2P

Accuracy @ 0-70 °C (32 - 158 °F):

PLATINUM

Operating Temperature Range:

Storage Temperature Range:

Sensor Output @ 0 °C (32 °F):

Accuracy @ 0 °C (32 °F):

NICKEL

Operating Temperature Range:

Storage Temperature Range:

Sensor Output @ 21.1 °C (70 °F):

Accuracy:

BALCO

Operating Temperature Range:

Storage Temperature Range:

Sensor Output @ 21.1 °C (70 °F):

Accur acy @ 21.1 °C (70 °F):

One

10 to 95% RH, non-condensing

304 Stainless Steel

22 AWG (0.65 mm)

-40 to 150ºC (-40 to 302ºF)

-40 to 85ºC (-40 to 185ºF)

A/1.8K: 1.8 KΩ nominal (Red/Yellow)

A/2252: 2.252 KΩ nominal (White/Red)

A/3K: 3 KΩ nominal (White/Brown)

A/5K: 5 KΩ nominal (Red/Gray)

A/AN (Type III): 10 KΩ nominal (White/White)

A/AN-BC: 5.238 KΩ nominal (White/Yellow)

A/50K: 50KΩ nominal (Brown/Yellow)

A/1.8K Series: +/- 0.5 °C @ 25 °C (77 °F)

and (+/-1.0 °C) (+/-1.8 °F)

-40 to 200 ºC (-40 to 392 ºF)

-40 to 85ºC (-40 to 185ºF)

A/100: 100 Ω nominal

+/- 0.06% Class A (Tolerance Formula: +/- °C = (0.15 °C + (0.002 * |t|))

where |t| is the absolute value of Temperature above or below 0 °C in °C)

@ -40 °C (-40 °F): +/- 0.23°C (+/- 0.414 °F)

@ 0 °C (32 °F): +/- 0.15°C (+/- 0.27 °F)

-40 to 121 ºC (-40 to 250 ºF)

-40 to 85 ºC (-40 to 185 ºF)

1 KΩ nominal (Red/Red)

@ -40 °C (-40 °F): +/- 1.52 °C (+/- 2.73 °F)

@ 0 °C (32 °F): +/- 0.4 °C (+/- 0.72 °F)

@ 21.1 °C (70 °F): +/- 0.17 °C (+/- 0.34 °F)

-40 to 121 ºC (-40 to 250 ºF)

-40 to 85 ºC (-40 to 185 ºF)

1 KΩ nominal (Orange/Yellow)

+/- 1%

A/CP (Type II): 10 KΩ nominal (White/Green)

A/CSI: 10 KΩ nominal (Green/Yellow)

A/10KS: 10 KΩ nominal (White/Blue)

A/10K-E1: 10 KΩ nominal (Orange/Gray)

A/20K: 20 KΩ nominal (Brown/Blue)

A/100KS: 100 KΩ nominal (Black/Yellow)

A/10K-E1 Series: +/- 0.3 °C (+/- 0.54 °F)

All Else: +/- 0.2 °C (+/- 0.36 °F)

A/1K: 1 KΩ nominal

@ 200 °C 392 °F): +/- 0.55 °C (+/- 0.99 °F)

@ 54.4 °C (130 °F): +/- 0.56 °C (+/- 1.00 °F)

@121 °C (250 °F): +/- 1.25 °C (+/- 2.25 °F)

Automation Components, Inc.

2305 Pleasant View Road | Middleton, WI 53562

Phone: [phone] | Website: workaci.com

Page 4

Version: 3.0

I0000815