Matheson 8067 User manual

MINT-0313-XX
Model 8067
Instrument User Manual

8067 MANUAL Matheson Tri-Gas
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MINT-0313-XX
Declaration of conformity
Product description: a handheld micro thermal conductivity sensor used to detect gas leaks. This
instrument has been designed specifically for search and location of non-flammable gases such as
helium and CFC’s.
Directives: 004/108/EC Electrical Equipment – Electromagnetic Compatibility (EMC)
Standards: BS EN 61010-1: 010 Safety requirements for electrical equipment for measurement,
Control and laboratory use – Part 1: General requirements
BS EN ISO 9001: 008 Quality management systems – Requirements
BS EN 613 6-1: 006 Electrical Equipment for measurement, control and laboratory use
- EMC Requirements (Class B and General Immunity)

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Contents
Declaration of conformity ............................................................................................................................... 2
Statements ....................................................................................................................................................... 4
Safety ............................................................................................................................................................. 4
Quality Assurance .......................................................................................................................................... 4
Responsibility of use ...................................................................................................................................... 4
Disposal ......................................................................................................................................................... 4
Calibration Facility .......................................................................................................................................... 4
Legal Notice ................................................................................................................................................... 4
Instrument description .................................................................................................................................... 5
Packing List ......................................................................................................................................................
How 80 7 works ............................................................................................................................................... 7
Thermal Conductivity ..................................................................................................................................... 7
Instrument main menu .................................................................................................................................... 8
Functions ........................................................................................................................................................ 10
Contrast ................................................................................................................................................ 10
Backlight ................................................................................................................................................ 10
Sound ................................................................................................................................................ 10
Peak hold ................................................................................................................................................ 10
Calibration ........................................................................................................................................... 10
Battery selection ...................................................................................................................................... 11
View Data ........................................................................................................................................... 11
Units .................................................................................................................................................... 11
Display .................................................................................................................................................... 11
Gas selection ......................................................................................................................................... 1
The Keypad .................................................................................................................................................. 13
Using The 80 7 .............................................................................................................................................. 14
Probe options ................................................................................................................................................. 15
Detecting Leaks ............................................................................................................................................. 1
Calibration ...................................................................................................................................................... 17
Over view ..................................................................................................................................................... 16
Selecting Factory or Custom Calibration ..................................................................................................... 17
Calibration procedure using 'ppm' units ....................................................................................................... 17
Calibration procedure using 'cc/sec' units .................................................................................................... 18
Instrument warranty and service ................................................................................................................. 19
Replacing batteries ........................................................................................................................................ 19
Instrument Specifications ............................................................................................................................. 20
Replacing parts .............................................................................................................................................. 21

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Statements
Safety
Please read this manual in full before using the 8067 instrument. Matheson Tri-Gas takes no
responsibility for damage, injury or death resulting from misuse, misunderstanding or negligence while
using this gas detector. Please contact Matheson Tri-Gas via the address below for clarification on
any aspect of this manual that is not understood or for additional information required.
This instrument should only be used by qualified or competent persons with suitable knowledge of the
hazards relating to the gases contained within equipment or in the local environment.
Quality Assurance
8067 instruments are manufactured in compliance with ISO9001, which ensures that the equipment
supplied to the customer has been designed and assembled reproducibly from traceable components,
calibrated to traceable standards.
Responsibility of use
Many gases are hazardous and can cause explosion, poisoning and corrosion resulting in damage to
property and life. It is the responsibility of the person using this instrument to ensure it is being used in
accordance with this manual and that the instrument is functioning correctly before use.
The 8067 can detect a large range of gases but some gases are more difficult to detect.
It is the responsibility of the user to ensure the 8067 instrument has the sensitivity to detect the
required gas before reaching potentially dangerous levels.
Inadequate performance of the gas detection equipment described in this manual may not necessarily be
self-evident and consequently equipment must be regularly inspected and maintained. Matheson Tri-gas
recommends that personnel responsible for equipment use institute a regime of regular checks to ensure it
performs within calibration limits and that a record be maintained which logs calibration check data. The
equipment should be used in accordance with this manual, and in compliance with local safety standards.
Disposal
Disposal of the 8067, its components, and any used batteries shall be in accordance with local and
national safety and environmental requirements. This includes the European WEEE (Waste Electrical
and Electronic Equipment) directive.
Calibration Facility
Matheson Tri-Gas offers a calibration service including the issue of certification confirming calibration
to NIST standards.
An 8067 Calibration Kit offers a means of checking and calibrating the instruments against a known
reference, however MATHESON strongly recommend the instrument is returned to an approved
service center on an annual basis for general maintenance and calibration.
Legal Notice
While every attempt is made to ensure the accuracy of the information contained in this manual, Matheson
Tri-gas accepts no liability for errors or omissions, or any consequences deriving from the use of information
contained herein. It is provided "as is" and without any representation, term, condition or warranty of any
kind, either expressed or implied. To the extent permitted by law, Matheson Tri-gas shall not be liable to any
person or entity for any loss or damage which may arise from the use of this manual. We reserve the right at
any time and without any notice to remove, amend or vary any of the content which appears herein.

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Instrument description
The 8067 is a portable hand held gas detector instrument predominantly used for detecting gas leaks, and
can detect almost all gases to varying degrees. Being a hand held instrument, it is powered by standard AA
size batteries and will accept both Alkaline and Nickel Metal Hydride (rechargeable) types.
The 8067 uses thermal conductivity as its means of detecting gas, which offers a robust sensor technology
that requires practically no maintenance beyond annual servicing.
All 8067 models have an easy to use graphical interface with an intuitive keypad allowing simple function
selection and adjustment.
The 8067 can be upgraded to add features without the need to be returned to the supplier and without
having to modify the internal firmware.
8067 has an LCD display, LED indicator, and an audible buzzer that indicates the detected signal.
Common applications where the 8067 is already used include:
* Quality assurance - Testing seal integrity after product manufacture
* Laboratory applications - Detection of leaks from mass spectrometers and chromatograph
equipment
* Industrial - Leaks from gas cylinders, pipe work and process equipment
* Medical - Testing of membrane materials and sealing of glove boxes
* Pneumatic - Valve seal testing
The 8067 is calibrated against a 5 E-4 cc/s Helium leak to allow volumetric readings and also a 5000ppm
Helium to allow measurement of concentrations.
Selectable units:
cc/sec Cubic Centimetres per Second offers a reading that indicates the volume of gas escaping
into atmosphere from a single point, i.e., leakage from a hole in a gas filled vessel or pipe.
ppm Parts Per Million is a concentration reading, 8067 will display the concentration being
detected however it is more difficult to gauge the quantity of leakage.
mg/m
3
Milligrams per meter cubed is also a unit that measures concentration. (See ppm above)
g/yr Grams per Year is an alternative measure of leak rate.
IMPORTANT NOTES:
The 8067 is NOT intrinsically safe, so it should not be using in a potentially explosive
environment. Intrinsically safe instruments are available. Please contact MATHESON for
more information.
Ambient air pressure, heat and humidity can also affect readings.
The 8067 range is NOT 'Gas Specific' i.e. It can NOT differentiate between gases.

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Packing list
Please remove all packing material and then check the content of the carry case against the list below before
use. Should the instrument or any accessory appear damaged or missing then contact the instrument
supplier for advice before use.
Item Qty Description Check
1 1 8067 instrument with short probe and nozzle fitted
1 Long probe
3 1 Box spanner used to change probes
4 1 Spare battery clip
5 1 User Quick Start-up manual

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How the 80 7 works
Thermal Conductivity
All gases conduct heat but by varying amounts, if an object is heated and then the source of heat is
removed, the object will eventually cool down to match ambient air temperature. This action occurs because
the ambient air surrounding the object carries the access heat into the surrounding atmosphere.
This principal is also the same for objects that are cooler than the surrounding ambient air.
Dissipation of heat into an air atmosphere is known and is a predictable rate. However, if the ambient air is
replaced with an alternative gas like Helium, the rate at which an object cools down changes.
If the object mentioned above had its environment replaced with pure Helium it would cool down to the
environment temperature about 6 times faster.
The 8067 contains a heated thermistor bead that transmits heat to a block of material that remains at a
constant temperature. As air passes through the detector chamber a constant amount of heat passes from
the bead to the block. Gases that are different to air will affect the rate at which heat transmits from the bead
to the block. These rates of change are measured and displayed as leak rates.
The diagram below shows the basic functionality of the 8067 Thermal Conductivity sensor.
A fan draws a small flow of gas through the probe and into the sensing chamber. The thermistor bead heats
up when electrical power is applied. As air passes through the cell a constant level of heat is transmitted to a
Temperature Stable block through the air, this rate of heat transmission is used to 'Zero' the instrument.
When gases with different thermal qualities pass through the chamber, the amount of heat being transmitted
to the Temperature Stable block changes. These changes are measured, calculated and displayed on 8067
as leak rates or gas concentrations.
PLEASE NOTE:
* Some gases have similar thermal properties to that of air; therefore the 8067 can only detect larger
concentrations of these gases.
* Some gases have positive and other gases negative signals. To simplify the instruments function 8067 only
displays changes as positive readings.
* The 8067 can NOT differentiate between gases! Selecting a specific gas on the 8067 allows the instrument
to calculate concentrations of that gas only if that gas is being detected.
Prob
e
Temperature
Stable
Fan
Air flow
Display

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Instrument main menu
Once the 8067 has run through its 'Start up' routine, it will display its normal 'Running screen' used when
locating gas leaks. Before using the instrument the various settings should be set and adjusted to suit the
application.
Pressing the 'Esc' key while viewing
this 'Running screen' will access the
instruments Main Menu. Repeated
pressing of the 'Esc' returns the
display back to the 'Running screen'.
Running screen
Main Menu
Contrast
Backlight
Sound
Peak Hold
Calibration
Battery
View Data
Units
Gas
Upgrade

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Running screen
8067 displays the 'Running screen' whenever the instrument is being used to detect leaking gas. The
illustration below outlines the various information and icons.
Gas selection
The 8067 displays the gas being measured in the top left of the running screen. The 8067 will display the
gas selected at the factory only, however the 8067 model has a range of gases that can be selected via an
internal gas table.
Sensitivity
The 8067 has three (3) sensitivity levels, X100 (times one hundred) is most sensitive, X10 (times ten) is mid-
range and X1 (times one) is least sensitive. See the sensitivity of various gases on the table under ‘Functions
(continues), Gas Selection’.
Battery status
When the battery symbol is filled in the battery is full, when just an outline the battery is exhausted
Backlight
The backlight symbol shows the status of the backlight even in bright daylight.
Gas measurement
The 8067 measures the leak rate of gas leakage in which ever units are selected.
Sound indication
This symbol shows if the sounder is on or off. If the semi-circle (on the right) of the symbol is present then
the sound is switched on; if not the sounder is switched off. The beep that occurs with each key press can-
not be switched off.
Bar graph
The bar graph increases as gas is detected. This graph is not scaled and should be used for indication only.
Peak hold
When selected, peak hold displays the maximum measurement on the display. Pressing the ENTER key
resets the reading but also logs the peak reading in memory.
Gas selection Sensitivity levels
Gas measurement
Bar graph
Battery status
Backlight indicator
Sound indicator
Peak hold indicator

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Functions
The 8067 instruments have a variation of functionality,
Contrast
Use this function to adjust the contrast of the 8067 LCD (Liquid Crystal Display).
Significant variations in ambient temperature conditions can cause the display to
appear too dark or feint.
When this function is selected a number will appear to the right of the Contrast
symbol as a percentage. Use the Up and Down keys to adjust the display contrast to
the desired level. When satisfied with the desired level selected, press the Esc key
to exit to the main menu.
Backlight
The user can select either Backlight On or Backlight Off.
In daylight the user may not be able to determine if
the backlight is On or Off, therefore a symbol on the
main running screen shows the status.
When the backlight is 'ON' it significantly reduces battery life.
Backlight OFF = 40hrs of use, Backlight ON = 0hrs of use.
Sound
The 8067 has an audible sounder that increases
frequency as detected gas levels increase. This sounder
can be switched On and Off. Use the Up or Down key to
move the 'tick' to the desired position and then press the
'Esc' key to return to the Main Menu.
An audible 'beep' can also be heard when ever the key pad is pressed, this beep
can not be switched off.
Peak hold
When selected, this function holds the highest detected reading on the display until
the 'ENTER' key is pressed.
Select Peak On or Off using the 'Up or Down' key and
then press 'Esc' key to exit to the 'Main menu'.
When using the 8067, press the ENTER key to clear
the held reading.
The reading held on screen will be logged when the 'ENTER' key is pressed.
WARNING: ZEROing the instrument in a contaminated environment will result in
false readings.
Calibration 2 & 3
There are two Calibration settings that can be selected;
Factory and Custom. Factory calibration is carried out
shortly after manufacture and cannot be adjusted,
however Custom calibration offers the ability to
calibrate the instrument between annual Factory
calibrations. The 8067 Zero's its reading at switch on,
therefore the Custom calibration routine only has one
stage.
Also see the ‘Calibration’ section of this manual.

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Functions
Battery selection 3
The 8067 will operate using AA size batteries in
either Alkaline (non-rechargeable) or Nickel
Metal Hydride (Rechargeable).
Select the battery type using the 'Up or Down'
key and then press the 'Esc' key to exit to the
Main menu.
Failing to select the correct battery type will not damage the instrument or affect it's
ability to detect gas, however it will cause the battery indicator to read incorrectly.
View Data 3
The 8067 instrument has the ability to data log 10 readings within
its internal memory. To store a reading press the 'ENTER' key
while on the main Running screen. When readings are stored in
memory a symbol will appear on the Main viewing screen.
When the memory is full the 'Data' symbol will flash. The stored data can be viewed
buy scrolling through the logged readings using the 'Up and Down' keys. To delete
the stored data press and hold the 'ENTER' key, the 'Trash can' symbol will flash,
continue holding the 'ENTER' key until the data is deleted. Press the 'Esc' key to exit
to the Main menu.
Units 3
8067 instruments have the capability of displaying detected readings in a variation of
units; ppm, cc/s, mg/m
3
and g/yr.
Use the 'Up and Down' keys to select the desired unit and then press the 'Esc' key
to exit to the main menu.
Please note: the Custom Calibration routine automatically selects the type a
calibration depending on this setting. See the ‘Calibration’ section of this manual.
cc/sec = Cubic Centimetres per second offers a volumetric leak rate that directly
measures the volume of a gas escaping from a given point, it is also known as
ml/sec (Millilitres per second). The GasCheck can typically detect Helium leaks
down to 0.0005 of a cubic centimetre per second.
ppm = Parts per million, this unit indicates a concentration but can't be used to
quantify a volume of gas leakage.
mg/m
3
= Milligrams per meter cubed, like ppm this unit is also concentration so can't
be used to quantify a volume of gas leakage.
g/yr = Grams per year offers an alternative volumetric leak rate that directly
measures the volume of a gas escaping from a given point.
Display 3
8067 instruments have the capability of displaying cc/sec and g/yr readings in either
decimal or exponent form. (Readings in ppm and mg/m
3
can only be displayed in
decimal form.)
Use the 'Up and Down' keys to select the desired unit. Press the 'Enter' key to
display the next screen. Use the 'Up and Down' keys to select the desired display
and then press the 'Esc' key twice to exit to the main menu.

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Functions
Gas selection 3
8067 is calibrated using Helium gas at time of manufacture, however other gases
can be detected and measured using a gas table within the instrument.
Although 8067 can't differentiate between gases it can quantify other gases using
response factors stored in its internal gas table. Gas groups 0, 1 , 3, and 4 offer a
generic sensitivity.
The following list indicates response factors for specific gases; however for advice
on gases not listed please contact MATHESON for advice.
Name Abbreviation
Minimum sensitivity
cc/sec (ml/sec)
Minimum sensitivity
cc/sec (ml/sec)
Hydrogen H 7.7 E-6 cc/sec 0.0000077 cc/sec
Helium He 1.0 E-5 cc/sec 0.000010 cc/sec
Refrigerant R1 R1 .7 E-5 cc/sec 0.0000 7 cc/sec
Refrigerant R1301 R1301 .4 E-5 cc/sec 0.0000 4 cc/sec
Refrigerant R134a R134a 5.8 E-5 cc/sec 0.000058 cc/sec
Refrigerant R R .6 E-5 cc/sec 0.0000 6 cc/sec
Refrigerant R11 R11 3. E-5 cc/sec 0.00003 cc/sec
Sulphur Hexaflouride SF6 . E-5 cc/sec 0.0000 cc/sec
Carbon dioxide CO 4.0 E-5 cc/sec 0.000040 cc/sec
Methane CH4 .9 E-5 cc/sec 0.0000 9 cc/sec
Argon Ar 3.5 E-5 cc/sec 0.000035 cc/sec
Oxygen O .9 E-4 cc/sec 0.000 90 cc/sec
Refrigerant R50 R50 3.0 E-5 cc/sec 0.000030 cc/sec
Refrigerant R404a R404a 3. E-5 cc/sec 0.00003 cc/sec
Refrigerant R407c R407c 3.3 E-5 cc/sec 0.000033 cc/sec
Refrigerant R410a R410a 3. E-5 cc/sec 0.00003 cc/sec
Refrigerant R507 R507 3.8 E-5 cc/sec 0.000038 cc/sec
To select an alternative gas use the 'Up and Down' keys to select the desired gas and then
press the 'ENTER' key to confirm the selection, at which point a tick will appear. Press
the 'ENTER or Esc' key to exit into the 'Main menu'.
If the gas to be detected does not appear in the instruments internal gas table then one of
the five 'Gas Groups' can be selected. 'Gas Groups' have a variation of sensitivities.
(Group 1 being high sensitivity through to Group 5 being low sensitivity) Contact
MATHESON for advice.
Gas groups allow the instrument to calculate leak rates with reasonable accuracy.

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Getting started
The Keypad
All 8067 models have the same keypads, the following section explains the general functionality of each
key:-
Zeroing
When the 8067 first switches on it will display its model number and the
Gas that it has been calibrated with.
A screen appears to indicate the 8067 is Zeroing it's signal.
Once the Zero routine is complete the instrument displays it's running screen and is ready for use.
ENTER
This key is used to select functions
and accept settings after a parameter
has been adjusted.
ZERO
Pressing the Zero key
Zeros-out background
readings.
On/Off.
Press this key once to switch the
instrument 'ON'. To switch the
instrument off press and hold this key
until the bar graph reaches the right
side of the screen.
his procedure has been designed to
avoid accidental switch OFF.
ESCAPE
This key is used to return the display to
the previous screen and to abort an
adjustment. Repeated pressing of this
key will return the display to the
'Display screen'.
UP
Use the UP key to scroll
through the function menu
and to adjust settings.
DOWN
Use to scroll down or
change selection
8067
He
Zeroing…
Zeroing… Zeroing…
Zeroing…


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Using the 80 7
The 8067 instrument
WARNING: Before switching the 8067 on, ensure the ambient air is clean as the instrument automatically
Zero's the sensor at switch on. After the instrument has run through it's start up routine, adjust the instrument
settings to the desired levels. Check the instruments sensitivity using a calibration kit.
Switch the 8067 on by pressing the ON/OFF key, after the instrument
has completed its Zero routine it will enter it's normal running screen.
(see right)
Ensure the instrument is on the X100 (times one hundred) range, while on the main running screen use the
UP and DOWN key to adjust between sensitivity ranges. X100 is most sensitive, X1 is the least sensitive.
Gas leaks tend to occur at pneumatic joints or welded seams, hold the 8067 at a 45
o
angle to the object
being tested and drag the probe along the seam or joint at a rate of approximately 5mm per second.
When a leak is detected the bar graph will start to fill and the frequency of the audio output will increase but
will reduce as the probe moves away from the leak. Return the probe to the suspected leaking area and
move slowly along the same area until the leak is located, once located the probe should be held at the leak
until the numeric reading stabilizes.
The bar graph offers a graphical indication only and should not be used to measure a leak. You may find
that the graph completely fills, however the numeric reading will continue to increase. Should the instrument
detect a leak that is too large for the range selected the numeric screen will flash and display '99999'. Use
the UP or DOWN keys to adjust the instrument sensitivity.
Variation in temperature, humidity and background gas may result in a constant level being detected on the
instrument. To reset to Zero, hold the instrument away from the source of contamination and then press the
ZERO key. The instruments display will return to a near zero reading.
The following things will affect the instruments reading:-
* Breath of the instrument user contains both CO and moisture;
* Barometric air pressure and background temperature;
* Sources of cold and heat.

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Probe options
In some applications the grey probe cover may restrict
access to the area under test, the grey probe cover can be
removed by pulling it off way from the instrument  . When
the grey cover is removed great care should be taken
when using the instrument and the following precautions
noted:-
* Do not remove the semi-transparent probe
sleeve, this sleeve ensure the metal inner probe
remains 1 mm from the surface of the test area
avoiding accidental dirt and moisture ingress.
* Do not touch the probe and especially the brass
sensor housing. Heat from fingers can result in
significant changes in signal causing false
readings.
* Avoid placing the probe on wet or dirty surfaces,
blockage of the probe will result in instrument
failure.
Some application may require a longer probe to gain
access to pneumatic joints and seams to be tested. The
8067 is also supplied with a 300mm probe that can be
changed by the user. To change probes carefully follow the
following steps:-
* Switch the instrument OFF
* Remove the outer grey probe cover 
* Place the box spanner (supplied with the instrument) over the existing probe so the spanner fits
over the brass nut , unscrew the probe counter-clockwise direction. 
* Withdraw the spanner and probe assembly 
To refit the short or the long probe follow the steps above but in reverse order.
CAUTION: When using the box spanner to tighten the probe nut, ensure the nut is firmly tightened however
do not use additional tools as the tread may become damaged.
Should a probe become blocked, use dry, clean compressed air to blow out the blockage from the instrument
end of the probe.
Cautionary Note: The instrument has been factory calibrated using the standard short capillary which sets a
certain flow rate into the detector.
The long capillary by nature of its construction has a different flow to improve the time response in detection.
This will change the calibration of the instrument when the long probe is used instead of the short
capillary. Thus the long probe is only to be used in finding leaks in difficult places where the standard short
probe cannot reach. The readings given by the long probe are only qualitative and the reading given by the
display is only to be taken as being relative to another value given by another leak site while using the long
probe.
WARNING: Ensure safety guidelines are adhered to when using compressed air.
(MATHESON takes no responsibility for injury or damage caused by misuse of compressed air equipment)

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Detecting leaks
Over view
Hold the 8067 in one hand and draw the
instrument probe along the area to be checked at
approximately 5mm per second. When a leak is
detected retrace the route of the probe at a slower
rate until the leak is located. Once located, hold
the instrument over the leak until the measurement
stabilises. The reading can be logged by pressing
the ENTER key.
Some readings may be larger than the instrument
can detect and the measurement units will be
replaced by '99999' on the display, in which case
used the UP or DOWN keys to adjust the
instruments sensitivity.
When detecting very small leaks or when detecting
gasses less sensitive, then a rate of 10 mm per
second may be required.
The outer grey probe cover can be removed to allow better access to restricted areas, if the outer probe is
removed the following points should be noted:-
* Avoid bending the inner probe as this will affect the 8067 accuracy.
* Avoid placing the probe in liquid or dirt as the probe can become blocked.
* Care should also be taken to ensure the brass sensor housing component remains at a constant
temperature. Avoid touching the brass sensor block with fingers.
* The 8067 can detect changes in Humidity and Carbon dioxide, therefore avoid breathing on the probe.
* The thin white tube that covers the inner probe should not be removed. This tube ensures a 1mm gap is
maintained between the probe and the surface being tested.

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Calibration
Over view
The 8067 has two selectable calibration settings; Factory
and Custom. 'Factory Calibration' done during the
instruments manufacture, it can be selected and used but
cannot be changed.
The 8067 is calibrated against a 5000 ppm Helium
concentration and a 0.0005cc/sec (5 E-4) Helium leak rate.
'Custom Calibration' gives the user the ability to calibrate
the instrument. This facility may offer improved accuracy
over the 'Factory Calibration' if the Barometric air pressure
differs from that stated on the instruments Calibration
certificate.
Selecting Factory or Custom Calibration
To select either Factory or Custom Calibration select the
Calibration screen and user the UP and DOWN keys to move
the 'tick / check' under the desired symbol, then Press the 'Esc'
key to exit into the main menu.
'Custom Calibration' can only be selected and used after the instrument has been calibrated by the user. To
do this move the 'tick / check' under the 'Custom Cal' symbol and press the ENTER key.
The 8067 requires either 5000 ppm Helium concentration or a 0.0005cc/sec (5 E-4 cc/sec) leak rate as a
reference. The 8067 automatically selects the type of Calibration media based on which units the instrument
already has selected.
If the 8067 is used to detect leaks measured using 'ppm or mg/m
3
' units, then the instrument must be
calibrated using a 5000 ppm Helium concentration.
If the 8067 is used to detect leaks measured using 'cc/sec' units, then the instrument must be calibrated
using a 0.0005 cc/sec (5 E-4) Helium leak.
Calibration procedure using 'ppm' units
Please read this entire procedure before proceeding with this calibration routine.
* Fill an empty (uncontaminated) sample bag with 5000 ppm Helium gas before
starting the calibration procedure. Also remove the outer grey probe from the 8067.
* Select the 'Custom Cal' symbol from the instruments menu. An option appears
allowing the adjustment of the 'ppm' value to ensure the instrument matches the gas
concentration being used. Use the UP and DOWN keys to adjust between 4900 and
5100 ppm.
* Ensure the instrument is in clean air and then press the ENTER key, the instrument
will Zero, this will take a few seconds but once complete a 'Ready' message will
appear.
* Insert the instruments probe fully into the sample bag containing the gas and press
the ENTER key. The instrument will automatically sequence through the cold and
hot stages of calibration but when finished gives a summary of values.
* Press the ENTER key to return back to the calibration option screen. Press the
ESC key to start using the instrument or press the ENTER key to calibrate again.
NO E: o avoid errors in calibration the following points should be noted:-
* Avoid bending the inner probe as this will affect the 8067 accuracy.
* 8067 can detect changes in Humidity and Carbon dioxide, therefore avoid breathing on the
probe.
* Avoid pressurizing the sample bag as this will cause significant errors in reading

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Calibration
Calibration procedure using 'cc/sec' units
Please read this entire procedure before proceeding with this calibration routine.
* Follow the instructions of the calibration standard. The pointer of the pressure
gauge must resting over the green segment.
* select the 'Custom Cal' symbol from the instruments menu.
* Ensure the instrument is in clean air and then press the ENTER key, the instrument
will Zero, this will take a few seconds but once complete a 'Ready' message will
appear.
* Insert the instruments probe into the standard outlet and press the ENTER key. The
instrument will automatically sequence through the cold and hot stages of calibration
but when finished gives a summary of values.
* Pressing the ENTER key will return back to the calibration option screen. Press the
ESC key to start using the instrument or press the ENTER key to recalibrate again.
NO E:
* 8067 can detect changes in Humidity and Carbon dioxide, therefore avoid breathing on the
probe.
WARNING: Great care should be taken to ensure the calibration gas is neither pressurised or restricts flow to
the instruments probe. Changes in flow of gas to the sensor will result in significant errors in readings.

8067 MANUAL Matheson Tri-Gas
Page 19 of 1
MINT-0313-XX
Instrument warranty and service
Warranty
Standard Warranty is one year from date of purchase.
Service
At Matheson Tri-gas we recommend that all of our gas detection instruments be returned for
service and factory calibration once every 1 months.
Contact Matheson Tri-gas or your local distributor for service options in your area.
Replacing batteries
Before using the 8067 instrument ensure the batteries
are fitted correctly or ensure NiMH (rechargeable)
batteries are fully charged before use.
To fit or replace batteries you must first remove the
battery cover from the rear of the instrument.
This can be done by prising open the battery clip with a
finger nail or screw driver.
Removing the battery cover will reveal a battery holder,
which requires 4 x AA size batteries. Before removing old
batteries or fitting new ones unclip the battery holder from
the instrument by prising apart the PP3 type clip shown in
the illustration.
Once the battery holder is disconnected from the
instrument, the batteries can be removed or replaced
however care must be taken when refitting the batteries
to ensure they are the correct polarity, polarity markings
are moulded on to the battery holder plastic.
The battery holder can be reconnected to the 8067 by
firmly pressing the two halves of the PP3 clip together.
Care should be taken to ensure the polarity is correct,
see the PP3 diagram (right).
The battery pack is then laid within the instrument and
the battery cover refitted, be careful not to trap wires
when refitting the battery cover.
Battery holder
Battery holder
PP3 clip
PP3 clip

8067 MANUAL Matheson Tri-Gas
Page 0 of 1
MINT-0313-XX
Instrument specifications
Operating temperature 0 to 50 °C 3 to 1 °F
Storage temperature - 5 to 70 °C -13 to 158 °F
Instrument case Polyurethane
Dimensions L.390 x W.60 x H.50 mm L15.35” x W .35” x .0 “
Weight 0.5 kg 1.0 lb.
Ingress ratings IP 0
Length of long probe 300 mm 1 "
Detection type Thermal conductivity
Detection time to T90 1 sec (Short probe) 9 sec (long probe)
Clear down time 1 sec (Short probe) 9 sec (long probe)
Battery type Alkaline or NiMH AA (Qty 4)
Battery life at 0 °C (68 °F). 40 Hours ( 0 hours when using the backlight)