TPI 775 User Manual

775

Combination Carbon Monoxide/Combustible

Gas Detector

1

Contents

• General Specifications

• Sensor Specifications

• Front View

• Back View

• Standard Accessories

• Optional Accessories

• General Description

• Turning On

• Operating Instructions

o General
o Combustion Gas Leak Detection

o Carbon Monoxide Detection

• Trouble Shooting Guide

• Guarantee

• LCD & LED Mode

• Tracker Mode

2

General Specifications

Dimensions

Goose Neck Length 16’’

Battery

Power Consumption

Sensor Life CO Sensor

Pressure Range 80 ~ 120kPa

Alarms Visual/Audible

Response Time CO

Leak Instantaneous

Operating Temperature

Sensor Specifications

Type Resolution Range Accuracy

Leak <50ppm 0~50,000ppm ±10%

CO 1ppm 0~2000ppm

240mm X 74mm X

55mm

1.5V Alkaline battery
C size X 2

About 400mW in

typical use.

0°C ~ 50°C

Months until 80

% original signal

(24 month

warranted)

90% of reading

in 30 seconds

±5ppm or 5%

whichever is

greater

3

Front View

Back View

4

Standard Accessories

Instruction Manual
Soft Pouch

Optional Accessories

Earphones

General Description

The 775 is a state-of-the-art Carbon Monoxide and Combustible
Gas Leak detector. It is the first of its kind to combine both de­tection technologies into one easy to use hand-held affordable
instrument.

5

Turning On.

Press the On/Menu button and the instrument will start its set up
procedure as follows:-

NOTE-Should the battery life indicator LED change to RED and the
‘bat’ symbol be displayed then batteries are flat and need replac­ing.

Software Version

CO and Combustible Gas initialisation period.
25 second countdown.

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Automatically Zeroes sensors to the air/environment you are in.

NOTE- Always turn instrument on in clean air

.

Automatically tests the Combustible Gas leak sensor

The instrument is now ready for use and the following screen
will be displayed:-

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NOTE-Should an error occur at any point of the set up procedure
please refer to the trouble shooting guide for assistance.

Operating Instructions

General

The backlight can be toggled on and off by pressing the N/▼/
backlight button.

Although the instrument performs an automatic zero during the
start up procedure a manual zero can be performed by pressing and
holding down the Y/▲/ZERO button until the following screen is
displayed:-

NOTE-Manual Re-Zero should only be performed in a clean air
environment.

To turn the instrument OFF press and hold down the ON/MENU but­ton till the instrument beeps.

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Combustible Gas Leak Detection

LCD & LED Indication Mode
The presence of Combustible Gas will be shown as follows:-

Amount of

Gas Present

<100ppm 0 None None

>100ppm <500ppm 1 1 None

>500ppm <1000ppm 2 1+2 None

>1000ppm <1500ppm 3 1,2+3 None

>1500ppm <2000ppm 4 1,2,3+4 None

>2000ppm <2500ppm 5 2,3+4 1

>2500ppm <3000ppm 6 3+4 1+2

>3000ppm <4500ppm 7 4 1,2+3

LCD Level

Indicator

Indicator
LEDs Lit

Green

Red

>4500ppm 8 None 1,2,3+4

An audible tone can be heard by turning the thumb wheel until it
clicks to the on position.

9

Tracker Mode
The 775 can also be used to Track/Trace a combustible gas leak by
using the following method:-

1. Adjust the TICK ADJUST by moving the thumb wheel in

2. Approach the suspected leak area with the combustible

3. Repeat step 2 until leak is found.

4. If the tick stops, the concentration level has decreased.

an anti-clockwise direction until a uniform ticking sound
is heard.

leak sensor until the tick begins to increase. When the tick
increases DO NOT move the sensor from the area but re­adjust the TICK ADJUST by moving the thumb wheel
back in a clockwise direction till the slower uniform tick­ing sound is heard again.

Move back in the opposite direction to find the leak again.

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Carbon Monoxide Detection

The following information can be accessed for the purpose of am­bient Carbon Monoxide monitoring by pressing the ON/MENU but­ton. Each press of the ON/MENU button will move you onto the
next screen as follows:

Record Maximum Readings

Displays the maximum recorded Carbon Monoxide value since
switch on.

The recorded Maximum CO level can be zeroed by pressing the Y/
▲/ZERO button for 5 seconds.

Elapsed Time

Displays, in Hours and Minutes, the elapsed time since switch on.

11

Alarm Warning Level

Displays the current value that the personal audible and visual
alarm is set at. Alarm is factory set at 30ppm CO.

The Alarm level can be adjusted by pressing the Y/▲/ZERO and N/
▼/backlight buttons.

Audible Alarm

Displays whether the Audible Alarm is switched on or off.

The Audible alarm can be toggled on and off by pressing the Y/▲/
ZERO and N/▼/backlight buttons.

NOTE- even though the audible alarm is switched off the visual
alarm (RED LED will flash and ‘Warning’ on the LCD) will remain
on.

12

**Factory use only**

Press ON/MENU button to return to Normal Operating Mode.

13

Trouble Shooting Guide

Problem Probable Cause Possible Remedy

Instrument won’t
turn on
‘SEnS Err’ dis­played on Screen

CO error is dis­played

Flat batteries Check and replace

batteries
Faulty Combustible
Gas Sensor

Faulty CO sensor Return Instrument

Combustible Gas

Sensor needs re-

plaing

to supplier

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Guarantee

Your 775 is guaranteed free from defects in materials and work­manship for 3 Years from the date of purchase. The Carbon Mon­oxide sensor is only guaranteed for 2 years.

Covered : - Repair parts and labour; or replacement of the product
at the option of your supplier. Normal transportation charges to
the purchaser are also covered.

Not covered : - Damage to the product which are the result of
abuse, improper use or maintenance are not covered. Any other
expenses, consequential damages, incidental expenses including
damages to property are not covered. Transportation expenses to
the customer are not covered.

To obtain warranty performance: - Include with the product your
name, address, phone number, written description of the problem
and proof of purchase date. Carefully package and return to your
supplier.

This guarantee does not affect your statuary rights.

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Visit TPI, The Value Leadertm at:

www.tpi-thevalueleader.com

Test Products International, Inc.
Headquarters:
9615 SW Allen Blvd.
Beaverton, OR 97005 USA
503-520-9197 • Fax: [phone]
e-mail: [e-mail]

Test Products International, Ltd.
342 Bronte St. South Unit #9
Milton, Ontario L9T 5B7 Canada
905-693-8558 • Fax: [phone]
e-mail: [e-mail]

16

Test Products International UK Ltd.
Longley House, East Park
Crawley, West Sussex RH10 6AP England
Tel: [phone]
Fax: [phone]
e-mail: [e-mail]