Detcon Sensor Duct Mount Kit User Manual

Model 700

DETCON, Inc.

Sensor Duct Mount Kit

Operator’s Installation and Instruction Manual

Covers 975-000020-893, 975-R00020-893

4055 Technology Forest Blvd. Suite 100,

The Woodlands, Texas 77381

Ph.281.367.4100 / Fax [phone]

www.detcon.com

November 19, 2012 • Document #3256 • Revision 1.2

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Phone: [phone] • Fax: [phone] •

www.detcon.com

•

[e-mail]

700 Duct Mount

Shipping Address 4055 Technology Forest Blvd. Suite 100,., The Woodlands Texas 77381

Model 700 Duct Mount Kit ii

Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067

700 Duct Mount

Table of Contents

1.0 Description..........................................................................................................................................1

2.0 Principle of Operation........................................................................................................................1

3.0 Installation..........................................................................................................................................2

4.0 Calibration..........................................................................................................................................4

5.0 Maintenance........................................................................................................................................4

6.0 Warranty.............................................................................................................................................4

7.0 Revision Log........................................................................................................................................5

Table of Figures

Figure 1 Sample flow diagram .....................................................................................................................1

Figure 2 Duct cutout dimensions..................................................................................................................2

Figure 3 Side view of installation, Square Duct, Round Duct........................................................................3

Figure 4 Cal Port..........................................................................................................................................4

Shipping Address 4055 Technology Forest Blvd. Suite 100,., The Woodlands Texas 77381

Phone: [phone] • Fax: [phone] • www.detcon.com• [e-mail]

Model 700 Duct Mount Kit iii

Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067

This page left intentionallyblank

700 Duct Mount

Model 700 Duct Mount Kit iv

700 Duct Mount

1.0 Description

The Detcon Sensor Duct Mount Kit for Model 700 gas detection sensors allows a Detcon Model 700 gas
sensor assembly to be mounted so that its sensor is located inside of an air duct, while its transmitter, located
outside the duct, is still accessible for calibration and other adjustments. This method of installation is much
more economical than the typical sample draw type system that is normally used in such applications. This
instruction manual explains the installation, calibration, and maintenance procedures of the duct mount con­figuration. Reference the instruction manual that came with your Detcon sensor assembly for further infor­mation.

2.0 Principle of Operation

In operation, air flow through the duct enters the duct mount chamber through ports facing the oncoming flow
of air. Once inside the chamber the sample passes by the sensor and then exits through similar ports that face
the opposite direction. If any target gas is present in the chamber, the sensor output signals and/or alarm
functions, will respond accordingly as described in the sensor assembly instruction manual.

Figure 1 Sample flow diagram

Model 700 Duct Mount Kit Rev. 1.2 Page 1 of 5

700 Duct Mount

3.0 Installation

1. Cut clearance hole in duct as shown below. Cutout is the same for square or round ducts. Minimum
suggested diameter for round duct is 10 inches to adapt with normal mounting techniques. Adapting to
an 8” diameter duct is possible with special mounting techniques. Below 8” diameter is not practical
for mounting.

2. Mount the duct mount kit using four 1/4” sheet metal bolts or other appropriate hardware.

3. If necessary you may enhance mounting integrity by using the two holes on the upper right portion of
the duct mount plate. Use standoffs and 1/4” sheet metal bolts or other appropriate hardware.

4. Perform installation wiring as described in the sensor assembly instruction manual. Use flexible
conduit to allow for future maintenance.

Figure 2 Duct cutout dimensions

Model 700 Duct Mount Kit Rev.1.2 Page 2 of 5

700 Duct Mount

Figure 3 Side view of installation, Square Duct, Round Duct

Model 700 Duct Mount Kit Rev. 1.2 Page 3 of 5

700 Duct Mount

4.0 Calibration

CAUTION: In high velocity air ducts, air flow may need to be shut down before calibration takes place.

1. Verify that there is no air flow through the duct.

2. Remove the cal port plug.

3. Apply the target gas to the cal port at a flow rate of 500 milliliter per minute for combustible (FP
series) and solid state H2S (TP series) sensors. Apply a flow rate of 1000 ml/m for toxic gas (DM
series) sensors.

4. Follow calibration instructions provided in the sensor instruction manual.

5. Remove the target gas and apply a zero air standard for clearing.

6. If necessary, repeat items 3-5 as indicated in the sensor instruction manual.

7. Replace the cal port plug. Calibration is complete.

Figure 4 Cal Port

5.0 Maintenance

To remove the sensor for replacement or maintenance, perform the following steps:

1. Remove the two bolts that hold the sensor condulet to the duct mount plate.

2. Pull the sensor out of the duct mount chamber and perform necessary maintenance.

3. Reverse the procedure to replace the sensor. If necessary, lubricate the O-rings inside the duct mount
chamber so that the sensor rain shield will slide into the chamber easily.

6.0 Warranty

Detcon, Inc., as manufacturer, warrants each sensor duct mount kit for a period of one year under the condi­tions described as follows: The warranty period begins on the date of shipment to the original purchaser and
ends one year thereafter. Should any part fail return the defective part to Detcon, Inc., for necessary repairs or
replacement.

Model 700 Duct Mount Kit Rev.1.2 Page 4 of 5

7.0 Revision Log

Revision

Date

Changes made

1.105/07

/10Previous release

1.2

11/19/12

Added notation regarding

minimum round duct diameter.

700 Duct Mount

Model 700 Duct Mount Kit Rev. 1.2 Page 5 of 5

Shipping Address 4055 Technology Forest Blvd. Suite 100,., The Woodlands Texas 77381

Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067

Phone: [phone] • Fax: [phone] • www.detcon.com• [e-mail]