Crowcon T4-HOCA-US-CRD, T4-HOZA-US-CRD, T4-HOCA-H2-US-CRD, T4-ZOCA-H2-US-CRD, T4-ZOZA-US-CRD User manual
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T4 User & Operator Manual
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Personal Gas Detection Equipment
T4
Portable Multigas Detector
M070044/Eng
Issue 4 Nov 2016
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CONTENTS
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PROLOGUE .............................................6
T4 Overview ....................................................6
Safety Information ........................................7
Unpacking .............................................10
1. Set-up ..............................................12
1.1 Prior to use .................................................12
1.2 T4 orientation ...............................................12
1.3 Charging & battery indications ................................13
1.4 Fitting the calibration/bump test plate ..........................15
1.5 Fitting the external lter plate .................................16
1.6 +ve Safety™ ................................................17
1.7 Quick view .................................................18
2. Operation ...........................................21
2.1 Turning on .................................................21
2.2 Home screen ...............................................24
2.3 Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
2.3.1 Low battery alarm .......................................25
2.3.2 Instantaneous alarm .....................................25
2.3.3 Short term exposure limit alarm (STEL) .....................26
2.3.4 Time weighted average alarm (TWA) ........................26
2.3.5 TWA Resume function* ...................................26
2.4 Alarm and status icons .......................................27
2.5 Accepting and Clearing Alarms ................................28
3
2.6 Sensors ...................................................29
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2.6.1 Oxygen sensor .........................................29
2.6.2 Electro-chemical sensors ................................29
2.6.3 Pellistor sensors .......................................30
2.6.4 Pellistor saver mode ....................................30
2.7 T4 menu icons ..............................................31
2.8 Accessing T4 menu functions .................................32
2.8.1 Home screen ...........................................32
2.8.2 Information Screen ......................................32
2.8.3 Manual zero ............................................33
2.8.4 Peak Mode .............................................34
2.8.5 Bump Test .............................................35
2.8.6 Calibration .............................................37
2.8.7 STEL (Short term exposure limit) ..........................39
2.8.8 TWA (Time weighted average) .............................39
2.8.9 Shutdown .............................................39
2.9 Data Logging ...............................................40
2.10 Event logging ..............................................40
2.11 Bump Test ................................................41
2.12 Calibration ................................................42
2.13 New sensor calibration/service ...............................42
2.14 T4 Aspirator Plate ..........................................43
3. Service and maintenance ..............................45
4. Specication .........................................46
4
5. Accessories .........................................47
Exit
6. Troubleshooting ......................................48
6.1 T4 Fault / Warning / Information Descriptions ....................48
6.1.1 Service Faults ..........................................48
6.1.2 Fault/Warning/Information Messages .......................48
7. Appendices ..........................................55
7.1 Sensor Limitations ..........................................55
7.2 Crowcon contacts ...........................................56
Warranty ...............................................57
5
PROLOGUE
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Prologue
Operation
Maintenance
Specication
Accessories
Troubleshooting
Appendices
Warranty
Set-up
T4 Overview
Thank you for purchasing T4. At Crowcon we recognise the need for reliable and robust personal
monitors which are sized to be worn and simple to use.
T4 is a portable monitor capable of detecting up to 4 gases in a compact and wearable design. Focused
on users and eet managers alike, T4 offers application focused solutions giving greater operating time
and reduced set up time.
T4 is classied for use in hazardous areas and gives loud and bright audible and visual alarm indications
as well as a vibrate alert. The front mount display is backlit for ease of use, and the simple single button
solution makes using and training quick and easy.
6
Safety Information
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• T4 is a hazardous area certied gas detector and as such must be operated and maintained in
strict accordance with the instructions, warnings and label information included in this manual.
T4 must be operated within the limitations stated.
• Read and understand all instructions in the operation section of this manual prior to use.
• Before use ensure that the equipment is in good condition, the enclosure is intact has not been
damaged in any way.
• If there is any damage to the equipment do not use, contact your local Crowcon ofce or agent
for repair/replacement.
• Do not disassemble or substitute components as this may impair intrinsic safety and invalidate
safety certication.
• Only genuine Crowcon replacement parts must be used; substitute components may invalidate
certication and warranty of the T4 and accessories, reference “Service and Maintenance”
section for details.
• No live maintenance is permissible.
• Observe all warnings and instructions marked on the unit and within this manual.
• Observe site health and safety procedures for gases being monitored and evacuation
procedures.
• Understand the screen display and alarm warnings prior to use.
• If this product is not working properly, read the troubleshooting guide and/or contact your local
Crowcon ofce or agent, for details reference the ‘Crowcon Contacts’ section of the manual
• Ensure maintenance, service and calibration is carried out in accordance with the procedures in
the manual and only by trained personnel.
Charging & Communication (Um = 9.1V)
• The T4 re-chargeable battery must only be charged in non-hazardous (safe) areas.
• Only connect to T4 in a safe area for charging or communications.
• T4 must not be charged or have communication to the device, at ambient temperatures outside
the range 0°C to +40°C.
• T4 has been certied and marked Um = 9.1V therefore, if charging T4 via the T4 Charger
Cradle use only Crowcon supplied AC Adaptor. Otherwise this may impair intrinsic safety and
invalidate safety certication.
• T4 has been certied and marked Um = 9.1V therefore, if charging T4 via the T4 10 way
charger use only Crowcon supplied AC Adaptor. Otherwise this may impair intrinsic safety and
invalidate safety certication.
7
• Alternative charging and communication cable assemblies types “power cable”, “communication
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cable”, “power and communication cable”, “vehicle power cable”, ”cradle power and
communications” and “cradle charger“ are suitable for use with T4.
• Refer to Power & Communication Cables Technical Data” manual (M07996) for further details.
• These devices are intended for use in normal atmospheric conditions of temperature –20 °C
to +55 °C; pressure 80 kPa (0,8 bar) to 110 kPa (1,1 bar); and air with normal oxygen content,
typically 21 % v/v (volume/volume).
• T4 ‘Type 2’ (as indicated on the certication label) may be used in Zones 1 and 2, for Group
llA, llB and llC gases and vapours and for Temperature Classes T1, T2, T3 and T4. (see
Certication label below).
Certication label
The certication marking is as follows:
II 2 G
Ex d ia IIC T4 Gb -20°C ≤ Ta ≤ +55°C
IECEx ULD 15.0002X
DEMKO 15 ATEX 1411
WARNING: DO NOT CHARGE THE BATTERY OR
CONNECT TO THE EQUIPMENT IN A HAZARDOUS
LOCATION. USE RECOMMENDED CHARGER ONLY.
READ & UNDERSTAND THE MANUAL BEFORE USE.
0038/
172 BROOK DRIVE
MILTON PARK
ABINGDON
OX14 4SD
UNITED KINGDOM
Made in the UK
Um = 9.1V
6.5V Class 2
1180
II 2 G
Ex d ia IIC T4 Gb -20°C ≤ Ta ≤ +55°C
IECEx ULD 15.0002X
DEMKO 15 ATEX 1411
WARNING: DO NOT CHARGE THE BATTERY OR
CONNECT TO THE EQUIPMENT IN A HAZARDOUS
LOCATION. USE RECOMMENDED CHARGER ONLY.
READ & UNDERSTAND THE MANUAL BEFORE USE.
GAS DETECTOR FOR USE IN HAZ LOCS,
ONLY AS TO INTRINSIC SAFETY
CL I, GR A, B, C & D: T4,
66Y6
-20°C ≤ Ta ≤ +55°C
172 BROOK DRIVE
MILTON PARK
ABINGDON
OX14 4SD
UNITED KINGDOM
Made in the UK
1180
Um = 9.1V
6.5V Class 2
• T4 is certied for use in ambient temperatures in the range -20°C to +55°C (-4 to 131°F).
IECEx
IEC 60079-0:2011 6th Edition
Electrical apparatus for explosive gas atmospheres Part 0: General requirements
IEC 60079-11:2011 6th Edition
Explosive atmospheres - Part 11: Equipment protection by intrinsic safety “i”
Ex d ia IIC T4 Gb Tamb -20°C to +55°C (T4 Type 2)
IECEx ULD 15.0002X
8
ATEX
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EN 60079-0: 2012 + A11:2013
Explosive atmospheres – Part 0: Equipment - General requirements
EN 60079-11:2012
Explosive atmospheres - Part 11: Equipment protection by intrinsic safety “i”
II 2 G Ex d ia IIC T4 Gb Tamb -20°C to +55°C (T4 Type 2)
DEMKO 15 ATEX 1411
UL
Gas detector use in hazardous locations Class 1 Division 1, Groups A, B, C and D only as to
intrinsic safety.
UL 913 Applicable Edition of the UL standard
UL 60079-0:2013 Applicable Edition of the UL standard
UL 60079-11:2013 Applicable Edition of the UL standard
9
Unpacking
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Your T4 will have been inspected and quality checked before it left our manufacturing facility.
It will be congured as a standard unit with standard settings as shown in the table below and
any changes to suit your specic site requirements can be made utilising Portables Pro 2.0 PC
Application and the Communications Cable, part number CH0103.
T4 Standard Conguration Settings:
Alarm levels/type* H2S (Hydrogen Sulphide)
Low Alarm = 5 PPM
Rising alarm
Latched
High Alarm = 10 PPM
Rising alarm
STEL = 10 PPM
TWA = 5 PPM
CO (Carbon Monoxide)
Low Alarm = 30 PPM
Rising alarm
Latched
High Alarm = 100 PPM
Rising alarm
STEL = 100 PPM
TWA = 30 PPM
Rising alarm
Latched
(Oxygen)
O
2
Low Alarm = 19% Vol
Falling
Latched
High Alarm = 23.5% Vol
Rising
LEL
Low Alarm = 20%
Rising alarm
Latched
LEL (CH4)
Rising alarm
High Alarm = 40% LEL (CH
(all T4s are shipped having been calibrated with 2.2% Vol CH4)
)
4
10
Calibration Interval 180 days
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Bump Test Disabled
Bump Interval 180 days
+ve Safety™ Enabled
Autozero Autozero Conrm
Lock on calibration due Disabled
Lock on bump due Disabled
Home Screen Flipped Disabled
* Other regional defaults are available
Box contents
• T4 checked and calibrated
• Quick start guide
• Calibration/Bump test plate for gas testing T4 – tubing can be bought separately in 1 m (3 feet
lengths)
• Calibration report
• Declaration of Conformity
The following items are optional:
Optional items
• T4 cradle charger – part number T4-CRD
• T4 ten way charger – part number T4-TWC
• T4 sensor lter plate – part number T4-EXT-F
• T4 Aspirator Plate – part number T4-ASP-CAP
• Portables Pro 2.0 software
• Communications cable – part number CH0103
• T4 Vehicle charger – part number T4-VHL (ATEX/IECEx/UL Version)
T4-VHL-BR (INMETRO Version)
• T4 I-Test – part number – IT-T4-11Z-ZB-1 (ATEX Version)
IT-T4-11Z-ZB-2 (UL Version)
IT-T4-11Z-ZB-3 (INMETRO Version)
11
1. Set-up
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1.1 Prior to use
Before use, T4 should always be checked for any signs of physical damage.
T4 uses a Lithium Ion (Li-ion) battery pack and should arrive with sufcient charge to be used
straight out the box. However, if this is the rst time of use, the battery will require charging to attain
the full operating time (see Charging & battery indications on page 13).
For battery run times, see the table on page 46.
1.2 T4 orientation
Figure 1: T4
Á
Ã
Â
Æ
À
Ç
È
Å
Ä
À D-ring à Sounder Æ Sensor apertures É Serial Number Label
Á Visual & audible alarms Ä Operator button Ç Alligator clip
 +ve Safety™ indicator Å LCD display È Certication label
É
12
1.3 Charging & battery indications
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Charging should only take place in non-hazardous (safe) areas. To charge T4, simply plug it into either
the desktop charging unit À or the ten-way charging unit Á (see Figure 2 below). Ensure T4 ts rmly on
to the power connector of whichever charging unit is used.
Figure 2: Charging options
À
Referring to Figure 3 below, when T4 is powered off and placed in a charger, the +ve Safety™ LED will
indicate charging status. Whilst T4 is charging the LED will ash red
will ash green Á.
Figure 3: Charging LED status
À, then when fully charged the LED
Á
À Á
13
T4 battery icon contains a maximum of 3 segments and will indicate charging by sequentially
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lling the battery segments and repeating this process. When fully charged all three segments
will be displayed.
When T4 is powered up and placed in a charger, the battery icon will indicate charging status but the
+ve Safety™ LED will indicate +ve Safety™ status, NOT charging status.
If T4 is switched on whilst charging, after approximately 30 minutes of being on charge T4 will
automatically power down and continue charging, showing the battery charging icon in the bottom
right of the screen.
Whilst T4 is not charging the battery icon segments, indicate the battery’s state of charge. These are
only shown when T4 is not placed in a charger.
When fully charged and all three segments are shown
hours run time* (see Figure 4 below). When T4 changes from three to two segments Á the battery
typically has a maximum of 12 hours run time. When T4 changes from two segments to one, the
battery typically has a maximum of 8 hours run time Â. When the battery icon is ashing with no
segments à the battery typically has a maximum of 30 minutes run time before the battery will be
depleted.
Figure 4: Battery Charge Status
À, the battery typically has a maximum of 18
À Á ÃÂ
Should T4 be deep discharged, the charging indication will not be shown until T4 has
i
been charging for 1 hour and the operator button has been pressed.
Store the battery in a fully charged state and recharge at least once every 6 months.
* Note: A T4 with no ammable sensor tted typically has a maximum run time of 50hrs. The run time between segment
changes will be longer than described above but when the battery icon is ashing with no segments the battery
typically has a maximum of 30 minutes run time before the battery will be depleted.
14
1.4 Fitting the calibration/bump test plate
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T4 is supplied with a calibration/bump test plate that can be used to carry out a daily bump test or a
regular calibration. Place the cap into the groove on the left hand side of the T4 rst À, ensuring the at
part of the cap faces the bottom of the T4 and the text is the correct way up, then click the right hand side
in place Á.
Refer to sections 2.8.5 and 2.8.6 for instructions on how bump test and calibrate utilising the calibration/
bump test plate via the T4 menu.
Please note that automated bump testing and calibration of T4 is also possible via the dedicated T4
I-Test bump and calibration station. Please refer to manual M070002 I-Test User & Operator Manual
for further details.
Bump testing and calibration can also be undertaken utilising the Portables Pro 2.0 software and the
calibration/bump test plate.
Once the gas test is complete, be sure to remove the calibration/bump test plate for
i
general use as this will prevent gas reaching the sensors and may prevent T4 responding
to gas.
The calibration/bump test plate must not be used in a hazardous area and is for safe area
i
use only.
Figure 5: Fitting the calibration/bump test plate
À
Á
15
1.5 Fitting the external lter plate
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The external lter plate is an optional accessory incorporating lters that allow gas to pass through
but protect the sensors from dirt and debris. The lter plate will protect the sensors making it easier to
maintain T4.
Place the lter plate into the groove on the left hand side of the T4 rst
plate faces the bottom of the T4, then click the right hand side in place Á.
Figure 6: Fitting the external lter plate
À, ensuring the at part of the
À
Á
The lter plate is suitable for use in a hazardous area.
The lter plate has been designed to operate with the charging accessories and does not need to be
removed when inserting T4 in to the desktop charger, the ten-way charger or the T4 vehicle charger.
The lter plate should be replaced if the lters are damaged by substances that could
i
affect the ow of gas to the sensors, like paints, grease or oils.
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1.6 +ve Safety™
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+ve Safety™ is a quick and easy indication of the operating status of T4, this status is indicated by a
front mounted LED.
When the +ve Safety™ LED is illuminated green, this indicates that the unit is functioning as
required and no further action is necessary, such as bump testing or calibration. This enables users
and supervisors to easily see that the employee is safe and following work procedures.
When the +ve Safety™ LED is illuminated red this indicates that one of the following situations has
occurred and will require user action:
• Battery is critically low: The battery has a maximum of 30 minutes runtime before it will be
completely depleted.
This will be accompanied by additional alerts signifying a low
battery, see Section 1.3.
• Bump test is required: Bump test has failed or exceeded the due date required to meet site
procedures.
The bump test due date can be reviewed via the information menu,
see Section 2.8.2.
• Calibration is due: Calibration has failed or exceeded the due date required to meet the
site procedure.
The calibration due date can be reviewed via the information menu,
see Section 2.8.2.
• T4 is in gas alarm: This could be a high or low gas alarm, or a STEL or TWA alarm.
T4 display will indicate which alarm type has been activated by
the relevant icon being displayed on the screen, see Section 2.3.
• T4 fault: T4 must be reviewed by trained personnel for repair as T4 has
detected an internal fault.
An appropriate fault warning will also have been shown on the display.
Figure 7: +ve Safety™ indicators
17
1.7 Quick view
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The conguration details of T4 can be reviewed even if T4 is not powered by momentarily pressing the
operator button.
The device will emit an audible blip and the LED’s to the right of the display will ash red once, the
serial number of T4 will then be displayed for 10 seconds, T4 will then turn off.
To review all conguration items the operator button must be pressed to scroll through the available
screens.
The conguration items that may be displayed are as follows:
• Serial number
• Firmware Version
• Congured User
• Sensors congured lower alarm levels (alarm 1)
• Sensors congured upper alarm levels (alarm 2)
• STEL congured alarm levels (if a toxic sensor is tted)
• TWA congured alarm levels (if a toxic sensor tted)
• Calibration Due Date
• Bump Due Date
• Instrument Date and Time
The is shown on all screens indicating that quick view is being accessed.
i
The battery status
If +ve Safety™ is congured, the +ve Safety™ LED will also illuminate for the duration of the quick
view review, showing the status of the instrument (see Section 1.6)
is also shown on each screen.
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The screen displays the Quick View screen.
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The screen then displays the T4 serial number.
The screen then displays the T4 rmware version.
This screen displays the T4’s congured user name.
This screen displays the sensors congured lower alarm levels.
This screen displays the sensors congured upper alarm levels.
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If a toxic sensor is tted this screen displays the STEL congured
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alarm levels (see Section 2.3.3).
If a toxic sensor is tted this screen displays the TWA congured
alarm levels (see Section 2.3.4).
This screen displays the date the T4’s next calibration is due.
This screen displays the date the T4’s next bump test is due.
This screen will only be displayed if bump test is congured
i
via Portables Pro 2.0.
This screen displays the T4’s date and time.
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2. Operation
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Before turning T4 on, ensure it is in ‘clean air’ (i.e. outside, in normal air, away from any
!
plant process or suspected gas location). This will allow T4 to be zeroed using clean air
as the base point. If T4 is zeroed in contaminated air a false gas reading can result, or the
zero could fail.
2.1 Turning on
T4 will not respond to gas until the startup sequence is complete.
i
In ‘clean air’, turn on T4 by holding down the operator button for 3 audible short blips followed by one
longer tone. T4 will warm up and go through a series of automatic processes as follows:
Firstly a test screen will be displayed showing all the possible LCD
segments and icons turned on.
If T4 is switched on within 8 hours of being switched off, the following
screen will be displayed for 10 seconds allowing T4 to retain TWA,
STEL and peak readings (see Section 2.3.5 for more details on this
feature).
Simply press the operator button to retain, or do not click the
operator button and allow countdown to expire.
The screen then displays the Crowcon splash screen.
This screen then displays the user’s company splash screen/slogan.
This screen will only be displayed if splash screen is
i
congured via Portables Pro 2.0.
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This screen then displays the T4 serial number.
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This screen then displays the T4 rmware version.
This screen then displays the T4’s congured user name.
This screen then displays the sensors’ congured lower alarm levels.
This screen then displays the sensors’ congured upper alarm levels.
If a toxic sensor is tted this screen then displays the STEL congured
alarm levels (see Section 2.3.3).
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If a toxic sensor is tted this screen then displays the TWA congured
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alarm levels (see Section 2.3.4)
This screen then displays the date the T4’s next calibration is due.
This screen then displays the date the T4’s next bump test is due.
This screen will only be displayed if bump test is congured
i
via Portables Pro 2.0.
This screen then displays the T4’s date and time.
If congured to do so, the last screen is the autozero screen.
This will operate as congured via Portables Pro 2.0.
i
The instrument will then revert to the normal operation ‘home screen’.
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2.2 Home screen
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After a successful start up sequence the screen will display the home screen as shown below À and (if
congured) the +ve Safety™ LED will be illuminated green indicating T4 is operating correctly.
The image shown is the home screen of a T4 tted with 4 sensors.
i
The same screen is also shown in ‘home screen ipped’ mode’
Portables Pro 2.0.
Figure 8: Display screen after successful start up
u
u
Á, if this has been congured via
v
v
w
À Á
u Gas type & unit
v Gas level
w Home screen symbol
x Battery Level indicator
v
v
uu
x
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2.3 Alarms
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T4 has the following types of alarm:
• Low battery
• Instantaneous
• Time weighted average (TWA)
• Short term exposure (STEL)
2.3.1 Low battery alarm
T4 will indicate a low battery alarm when the battery has a maximum
of 30 minutes remaining life.
This warning should be acknowledged immediately by
i
pressing the operator button.
The sounder will then emit an audible double blip every 5 seconds and the display will ash the
battery empty icon
In addition, if congured to do so (see Section 1.6), the +ve Safety™ LED will change state and
illuminate red.
When the low battery alarm is displayed the operator should nish their current activity and move to
a safe area before the 30 minutes battery life expiries.
.
2.3.2 Instantaneous alarm
T4 will go into alarm immediately if the level of any gas congured to be detected, exceeds
acceptable limits. A minimum and maximum level is set for oxygen, whilst the remaining gases will
cause an alarm for rising gas levels.
T4 will indicate an alarm state ‘1’ or alarm state ‘2’ according to which congured gas level has been
exceeded.
When T4 is in instantaneous alarm the appropriate ‘bell’ alarm symbol
repeatedly on the screen to indicate which level of alarm has been triggered, the gas type and unit
icon will ash to indicate which gas has triggered the alarm, the sounder will emit a tone, alarm LEDs
will ash red and blue, and the T4 will vibrate.
If +ve Safety™ is congured the +ve Safety™ LED will also be illuminated red. The LED
i
will return to green when the instantaneous alarm is cleared.
or will ash
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2.3.3 Short term exposure limit alarm (STEL)
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For each toxic gas being monitored T4 stores information about the gas levels detected to determine
the average exposure over a 15 minute running period. If the average levels detected over the dened
period of time exceed predetermined levels, T4 will go into alarm (STEL is not monitored for the
duration of a bump test or calibration). The STEL alarm level can be congured via Portables Pro 2.0.
In the alarm state, the STEL symbol on the screen
been exceeded, the sounder will emit a tone, alarm LEDs will ash red and blue, and the T4 will
vibrate.
If +ve Safety™ is congured the +ve Safety™ LED will also be illuminated red. The LED
i
will return to green when the STEL alarm is cleared.
will ash indicating the STEL levels have
2.3.4 Time weighted average alarm (TWA)
For each toxic gas being monitored T4 stores information about the gas levels detected to determine
the average exposure over an 8 hr running period. If the average levels detected over the dened
period of time exceed predetermined levels, T4 will go into alarm (TWA is not monitored for the
duration of a bump test or calibration). The TWA alarm level can be congured via Portables Pro 2.0.
In the alarm state, the TWA symbol on the screen
exceeded, the sounder will emit a tone, alarm LEDs will ash red and blue, and T4 will vibrate.
If +ve Safety™ is congured the +ve Safety™ LED will also be illuminated red. The LED
i
will return to green when the TWA alarm is cleared.
will ash indicating the TWA levels have been
2.3.5 TWA Resume function*
TWA Resume allows TWA, STEL and peak readings to be retained after T4 has been switched off
for a period of time, for example while an operator travels to a new location. This prevents recent
toxic exposure history from being lost and the associated risk of the operator exceeding safe
exposure levels.
If T4 is switched off for less than 15 minutes and the TWA Resume function is selected (see below),
T4 will retain the STEL, TWA and peak gas values when powered back on.
If T4 is switched off for more than 15 minutes but less than 8hrs, and the TWA Resume function is
selected (see below), T4 will retain the TWA and peak gas values when powered back on but the
STEL values will be cleared.
If T4 is switched off for more than 8hrs the TWA Resume function will not be available in the start up
sequence and T4 will clear the TWA, STEL and peak gas values when powered back on.
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The TWA Resume function can be activated during the start up sequence.
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Upon start up, following the test screen, if T4 is switched on within 8
hours of being switched off, the screen shown right will be displayed
for 10 seconds allowing the user to ‘resume’ if required.
Simply click the operator button.
If T4 is now being used by a new operator and the TWA Resume function is not required do not click
the operator button and allow countdown to expire. This will reset the STEL, TWA and peak values
back to zero.
* Patent pending - UK Patent Application Number 1501699.1
2.4 Alarm and status icons
The alarm status is represented by the icons shown in the table below:
Icon Description Action
Status OK No action required
Fault status Refer to Section 6 for troubleshooting
Long term exposure alarm
(TWA)
Short term exposure alarm
(STEL)
Alarm 1 Follow site procedure
Alarm 2 Follow site procedure
Follow site procedure
Follow site procedure
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2.5 Accepting and Clearing Alarms
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The operation of alarms in terms of how they are cleared is dependent upon the alarm type and also
the conguration option, which can be changed via Portables Pro 2.0.
The options are ‘latched’ and ‘non-latching’ and the functionality is described in the table below.
Alarm 2 cannot be congured and behaves as a latched alarm.
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Conguration
Setting
(Alarm 1 only)
Latched
Non-latching
While in alarm, T4 will continue to record levels of all the gases being monitored.
Instantaneous Alarm 1 Instantaneous Alarm 2
An instantaneous alarm 1
cancelled by pressing the operator
button but only when the gas level has
dropped below the alarm level
An instantaneous alarm 1
be latched and will return to a nonalarm state without user acceptance
once the gas level has dropped below
the alarm level
can be
will not
An instantaneous alarm 2 can be
cancelled by pressing the operator
button but only when the gas level has
dropped below the alarm level
An instantaneous alarm 2 can be
cancelled by pressing the operator
button but only when the gas level has
dropped below the alarm level
i
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2.6 Sensors
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T4 is available with the following sensor options:
• Oxygen Sensor
• Carbon Monoxide Sensor (Electro-chemical)
• Hydrogen Sulphide Sensor (Electro-chemical)
• Flammable gases sensor (Pellistor)
T4 also offers a Hydrogen immune carbon monoxide sensor if required.
T4 ammable gas sensor is congured and calibrated at the factory to detect methane.
T4 ammable sensor must only be calibrated with methane.
i
However T4 can be congured to detect other ammable gases. The ammable gas to be detected
and the correction factor can be changed in T4 via the PC Application, Portables Pro 2.0.
The table below shows the ammable gases T4 (Type 2) can be congured to detect.
Correction factors must only be used if the ammable sensor has been calibrated with methane.
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Flammable Gas Correction Factor Response Time T90
Hydrogen 0.72 < 10 seconds
Methane 1.00 < 20 seconds
Propane 1.83 < 30 seconds
Butane 1.83 < 30 seconds
Pentane 2.22 < 30 seconds
2.6.1 Oxygen sensor
This sensor is in the form of an electro-galvanic fuel cell which is an electrical device used to measure the
concentration of oxygen gas in the ambient air. Set as default with both higher and lower alarm levels.
2.6.2 Electro-chemical sensors
Electrochemical gas sensors measure the volume of a target gas by oxidising or reducing the target
gas at an electrode and measuring the resulting current.
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2.6.3 Pellistor sensors
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Pellistor sensors (or catalytic beads) are specically designed to sense explosive gases. The
detecting element consists of small “beads” of catalyst loaded ceramic whose resistance changes in
the presence of gas.
2.6.4 Pellistor saver mode
Pellistor sensors can suffer degradation if powered while exposed to ammable gas concentrations
greater than 100% LEL, and also if exposed to high levels of H2S or silicones.
To reduce degradation T4 employs a Pellistor saver mode.
When the ammable gas exceeds the pellistor saver threshold, the
detector will turn off the sensor for a minimum period of 200 seconds
When pellistor saver mode is activated the user must immediately
move to a clean air environment.
À.
À
After the dened period the sensor can be re-activated by a single
click of the operator button
environment.
Á once the instrument is in a clean air
Á
After a stabilisation time (
then the sensor will be turned off and the cycle starts again.
Â), if the gas level still exceeds the threshold
Â
While in saver mode and the subsequent stabilise time, the gas level displayed on the LCD screen
will indicate over range. As the sensor has been exposed to a gas level sufcient to cause a sensor
over-range T4 should be gas tested to ensure no lasting damage has occurred.
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2.7 T4 menu icons
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The following menu functions on the T4 display can be selected:
Icon Title Action
Home Return to Home page
Information Displays unit status/conguration
Zero Performs a sensor zero
Peak Mode Displays peak gas readings
Bump Performs a bump test
Calibration Performs a Calibration
STEL (Short Term Exposure Limit) Displays the current STEL value
TWA (Long Term Exposure Limit) Displays the current TWA value
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2.8 Accessing T4 menu functions
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X With the home screen displayed, double click the operator button À to
access the menu functions Á.
X Single click the operator button
repeatedly to scroll right until the
required menu icon is displayed and
then double click the operator button
to select the function.
Á
X As a safety feature if gas is detected whilst in a menu, T4 will revert back to the home screen
to ensure the gas readings are displayed. This will not occur if T4 was in bump test mode,
calibration mode or peak mode.
À
2.8.1 Home screen
When this icon is selected, the Home screen will be displayed.
2.8.2 Information Screen
The information screen displays the T4 status/conguration.
X With the home screen displayed, double click the operator button
to access the menu functions screen.
X Single click the operator button repeatedly to scroll right until the
menu icon is displayed and then double click the operator
button to select.
The screen will display the same sequence of screens as when Quick View is selected, please refer
to Section 1.7 for details.
In addition the Information screen will also display any identied fault;
this fault will be indicated by a warning icon on the home screen.
Accessing the information screen will provide further details of the
identied fault.
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2.8.3 Manual zero
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A manual zero should only be carried out in ‘clean air’.
i
The manual zero function allows T4 to be zeroed at any time.
X With the home screen displayed, double click the operator button to
access the menu functions screen.
X Single click the operator button repeatedly to scroll right until the
menu icon is displayed and then double click the operator
button to select.
X The zero countdown screen will then be displayed.
X To perform a manual zero, press the operator button before the countdown nishes.
If the operator button is not pressed before the countdown is complete, T4 will not
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perform a manual zero and will automatically return to the home screen.
A successful zero of a channel will display a tick on the screen as can
be seen, T4 will then automatically return to the home screen.
An unsuccessful zero will display a cross in the failed channel, T4
will then automatically return to the home screen.
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2.8.4 Peak Mode
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The peak mode function allows peak gas readings to be viewed at any time.
The peak mode function can also be utilised for pre-entry checks, where T4 is to be lowered into a
conned space.
X With the home screen displayed, double click the operator button to access the menu functions screen.
X Single click the operator button repeatedly to scroll right until the
then double click the operator button to select.
X The screen opposite will then be displayed showing the peak
readings for each gas.
X After a few seconds the clear countdown screen will be
displayed.
X If you wish to clear the peak levels recorded, press the operator
button once.
X If the operator button is not pressed the display will continue to
show the peak readings and the peaks will not be cleared.
Peak readings will continue to be shown until the user exits peak mode.
menu icon is displayed and
Peak mode can also be useful during pre-entry checking of a conned space. Peak mode can
be selected and T4 lowered into the area to be checked. When T4 is subsequently removed the
peak gas readings will be displayed on the screen. Any alarm can be cancelled and the display will
continue to indicate the peak gas reading.
To exit the peak mode function the operator button must be double clicked to return to the
menu screen and then double clicked again to return to the home screen.
Ensure that T4 is returned to the home screen after the peak function is no longer
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required, this will ensure T4 is displaying current gas readings and not peak values.
Peak readings are cleared to clean air nominal values.
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Peak readings are not monitored for the duration of a bump test or calibration.
i
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2.8.5 Bump Test
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T4 bump test via menu must be performed utilizing quad gas containing CO, H2S, O2 and
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CH4 for a fully populated T4.
The applied test gas must contain gas concentrations capable of exceeding the
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congured alarm level 1 for each gas.
Bump strategy must be enabled for the bump test to operate via the menu function, this
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can be congured utilizing Portables Pro 2.0.
A bump test can also be performed via Portables Pro 2.0 or via I-Test.
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If utilizing gas extraction do not place the extraction outlet closer than 20cm to the
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calibration/bump plate as this may result in an incorrect bump test result.
The bump test function allows T4 to be bump tested at anytime.
X Ensure the calibration/bump test plate is tted and the gas supply attached but not providing gas,
before selecting the bump test function.
X With the home screen displayed, double click the operator button
to access the menu functions screen.
X Single click the operator button repeatedly to scroll right until the
menu icon is displayed and then double click the operator
button to select.
X The bump test countdown screen will then be displayed.
X To initiate a bump test, press the operator button before the
countdown is complete
X The apply gas countdown screen will then be displayed and the
test gas must now be applied.
If the operator button is not pressed before the countdown
i
is complete, T4 will not perform a bump test and will
automatically return to the home screen.
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When T4 detects the applied test gas the countdown screen will
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be replaced with the bump test gas reading screen, this will continue
to show the gas readings until the bump test result is displayed.
If the test gas is not supplied before the end of the
i
countdown the bump test will fail, the bump test will be
set to due and, if congured, the +ve Safety™ LED will be
illuminated red.
X If the bump test is successful a tick will be displayed for each
gas that passes, if the bump test is not successful a cross will
displayed for each gas that fails.
X The remove gas countdown screen will then be displayed, the
test gas must be turned off and the bump/calibration plate
removed.
X The updated bump test date due screen will be displayed
following a successful bump test.
X If the bump test was not successful the bump due now screen
will be displayed and, if congured, the +ve safety LED will be
illuminated red.
X During the bump test as gas is applied the instantaneous alarms
will be activated as the gas level exceeds the congured alarm
level.
X This will be indicated by the appropriate ‘bell’ alarm and gas type and unit icon ashing repeatedly
but the sounder, LED’s and vibrator will be disabled during the bump test.
X A short period after the completion of the bump test the sounder, LED’s and vibrator will be enabled.
X Press the operator button to cancel the alarm.
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2.8.6 Calibration
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T4 calibration via the menu must be performed utilizing Crowcon quad gas of the
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following values H2S = 15ppm, CO = 100ppm, O2 = 18%VOL and CH4 = 50%LEL (2.2% VOL)
‘Allow calibration’ must be enabled for the calibration to operate via the menu function,
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this can be congured utilizing Portables Pro 2.0.
A calibration can also be performed via Portables Pro 2.0 or via I-Test.
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If utilizing gas extraction do not place the extraction outlet closer than 20cm to the
i
calibration/bump plate as this may result in an incorrectly calibrated T4.
The calibration function allows T4 to be calibrated at anytime.
X Before starting, ensure the calibration/bump test plate is not connected and that the instrument is
in clean air.
X With the home screen displayed, double click the operator button to access the menu functions screen.
X Single click the operator button repeatedly to scroll right until
the
operator button to select.
X The calibration countdown screen will then be displayed.
X To initiate a calibration press the operator button before the
countdown is complete.
menu icon is displayed and then double click the
X The zero countdown screen will then be displayed and a zero will
be performed when the countdown is complete.
X A successful zero of a channel will display a tick on the screen.
X If the zero is unsuccessful a cross will be displayed for each gas
that fails, the calibration will fail and, if congured, the +ve safety™
LED will be illuminated red.
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X If the zero is successful, the apply gas countdown screen will be
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displayed.
X Fit the calibration/bump test plate and apply the calibration gas.
X When T4 detects the applied test gas the countdown screen
will be replaced with the calibration gas reading screen, this will
continue to show the gas readings until the calibration result is
displayed.
If the test gas is not supplied before the end of the
i
countdown the calibration will fail, the calibration will be set
to due and, if congured, the +ve Safety™ LED will be
illuminated red.
X If the calibration is successful a tick will be displayed for each gas
that passes, if the calibration is not successful a cross will
displayed for each gas that fails.
X The remove gas countdown screen will then be displayed, the test
gas must be turned off and the bump/calibration plate removed.
X If the calibration was successful the updated calibration due date
will be displayed.
X If the calibration failed, T4 will display the calibration due screen
and, if congured, the +ve Safety™ LED will be illuminated red.
X During the calibration as gas is applied the instantaneous alarms will
be activated as the gas level exceeds the congured alarm level.
X This will be indicated by the appropriate ‘bell’ alarm and gas type and unit icon ashing repeatedly
but the sounder, LED’s and vibrator will be disabled during the calibration.
X A short period after the completion of the calibration the sounder, LED’s and vibrator will be
enabled.
X Press the operator button to cancel the alarm.
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2.8.7 STEL (Short term exposure limit)
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The STEL function allows the current STEL value to be displayed.
For further details on the function of the STEL alarm refer to Section 2.3.3.
X With the home screen displayed, double click the operator button to access the menu functions
screen.
X Single click the operator button repeatedly to scroll right until
the
operator button to select.
X The STEL current value screen will then be displayed.
X T4 will revert back to the home screen automatically after
30 seconds or the operator button can be double clicked to
return to the menu screen and then double clicked again to
return to the home screen.
menu icon is displayed and then double click the
2.8.8 TWA (Time weighted average)
The TWA (or long term exposure limit) function allows the current TWA value to be displayed.
For further details on the function of the TWA alarm refer to Section 2.3.4.
X With the home screen displayed, double click the operator button to access the menu functions
screen.
X Single click the operator button repeatedly to scroll right until
the
operator button to select.
X The TWA current value screen will then be displayed.
menu icon is displayed and then double click the
X T4 will revert back to the home screen automatically after
30 seconds or the operator button can be double clicked to return
to the menu screen and then double clicked again to return to the
home screen.
2.8.9 Shutdown
To turn T4 off, press and hold the operator button. A 5 second
countdown will start. Hold the button down until the countdown has
nished and T4 will shut down. If you release the button before the
countdown has nished, T4 will resume operation. Once off, place
on charge if required (see Section 1.3).
T4 cannot be shutdown if a zero, bump test or calibration is in
progress.
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2.9 Data Logging
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The data log records gas levels for all sensors and has capacity of 45,000 logs (125hrs @10 sec intervals).
All data logs can be downloaded from T4 via Portables Pro 2.0.
2.10 Event logging
Event logging records signicant events occurring during T4 operation.
The event log has a capacity of at least 1000 events.
Events include:
• Power on/off
• Alarm 1 Activation
• Alarm 2 Activation
• STEL Alarm Activation
• TWA Alarm Activation
• Operator Acknowledgments
• Calibration Events/Status
• Bump Test Events/Status
• Zero Events/Status
• Low Battery
• User Change
• Pellistor Saver Mode
• Insert Into I-Test station
• Time Change/Set
• Event Log Upload
• Faults
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2.11 Bump Test
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Crowcon recommends regular bump tests to conrm sensor operation. This involves applying a
known composition of the correct gas to each sensor to verify sensor response and alarm function.
Organisational specic Health and Safety regulations should be adhered to, and a number of exible
and simple solutions are available.
T4 implements a speedy bump test in which gas is applied to trigger alarm level 1.
T4 bump strategy can be congured via Portables Pro 2.0.
A bump test can be performed on T4 in one of the following ways:
• Via T4 menu and utilizing the calibration/bump test plate (see Section 2.8.5)
• Via Portables Pro 2.0 utilizing the calibration/bump test plate
• Via the I-Test gas station where all testing is fully automated.
I-Test is an intelligent stand alone gas test and calibration solution, suitable for small and large
eet users alike, I-Test offers simple fully managed testing with data capture as well as the
ability to update congurations.
Please refer to I-Test User & Operator Manual M070002
If any channel fails speedy bump then T4 should be calibrated, please refer to Section 2.8.6.
From the 1st November 2010, EN60079-29 part 1 has been harmonised under the ATEX
i
directive 94/9/EC. Therefore to comply with the ATEX directive, portable apparatus
sensing ammable gases should have a functional check with gas before each day of use.
Other testing regimes may be employed depending on local circumstances.
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2.12 Calibration
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Calibration should be carried out if any channel fails a bump test or if T4 has exceeded its calibration
due date.
A calibration can be performed on T4 in one of the following ways:
• Via T4 menu and utilizing the calibration/bump test plate (see Section 2.8.6)
• Via Portables Pro 2.0 utilizing the calibration/bump test plate
• Via the I-Test gas station where all testing is fully automated.
I-Test is an intelligent stand alone gas test and calibration solution, suitable for small and large eet
users alike, I-Test offers simple fully managed testing with data capture as well as the ability to
update congurations.
I-Test is suitable for regular periodic calibrations but Portables Pro 2.0 must be utilised for
i
calibration when sensors or PCB’s have been replaced.
Please refer to I-Test User & Operator Manual M070002.
T4 calibration due dates are automatically updated upon a successful calibration; the factory default
interval is set at 180 days.
Calibration should be undertaken with the appropriate Crowcon supplied gas cylinder or equivalent.
The ammable sensor should always be calibrated with methane gas.
i
If the calibration fails this may be indicative of a more serious sensor issue, including the need to
replace sensors. The T4 should then be serviced.
2.13 New sensor calibration/service
Servicing or the tment of a new sensor can only be undertaken by a suitably trained technician
using Portables Pro 2.0 software and the appropriate gas.
In addition calibration should be performed as required by local or organisational regulations. In
the absence of suitable evidence, such as a eld assessment by a competent person, Crowcon
recommend regular service and calibration every 6 months.
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2.14 T4 Aspirator Plate
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The aspirator plate can be used in scenarios where sampling from an area may be required.
The hand aspirator bulb (part number AC0504) will also be required.
Fit the aspirator plate
of the cap faces the bottom of the T4 and the text is the correct way up, then click the right hand side
in place Â.
Figure 9: Attaching the Aspirator Plate
À into the groove on the left hand side of the T4 rst Á, ensuring the at part
À
Á
Â
The hose end
the right hand side (as viewed from the front) adjacent to the arrow head on the aspirator plate.
Figure 10: Attaching the Hand Aspirator
à of the hand aspirator bulb must then be attached to the aspirator plate port Ä on
Ä
Ã
43
The tment of the plate should then be checked to ensure a gas tight seal has been achieved. The
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bulb should be depressed whilst blocking the adjacent port with a nger; the T4 may at this point
indicate an alarm on the O2 sensor this is due to the pressure effect on the oxygen sensor. The hand
aspirator bulb should not return to the rounded shape if a gas tight seal has been achieved. If the
bulb does return to is normal shape, reposition the aspirator plate and repeat this test.
Allow the O
sensor to stabilise before continuing.
2
The sample hose must then be attached to the aspirator plate on the left hand side (as viewed from
the front) adjacent to the base of the arrow on the aspirator plate.
Place the sample tube into the area to be sampled and depress the aspirator bulb. Allow the bulb to
return to its rounded shape and then depress the bulb again. Repeat this process to get a constant
sample ow to the sensors.
Every depression of the aspirator bulb should pull the sample approximately 25cm up the tube.
Therefore to sample from a 5 meter hose – at least 20 aspirations will be required, however a
minimum of 1 minute is recommended to ensure a stable sample is read.
The maximum length of the sample hose allowable is 30m.
It should be noted that for sample hose lengths greater than 5m the oxygen sensor may initially go
into a falling alarm state for approximately 1 minute, due to pressure effects, before settling back
down to read accurately.
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3. Service and maintenance
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T4 is designed to require minimal service and maintenance. As with all electrochemical sensors
however, these will require periodic replacement.
Ensure maintenance, service and calibration are carried out in accordance with the
i
procedures in the manual and only by trained personnel.
For further service or maintenance, contact your local Crowcon agent or regional ofce (see
Section 7.2).
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4. Specication
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Detector type T4
Gases* O
Size (d x l x w)
(excluding clip)
Weight 4 gas 282g (9.9oz)
Alarms Audible>95dB
Display Front mount with optional 180 degree ip for ease of view
Data logging 130hrs @ 10 second intervals
Event logging Alarm, over range, calibration, bump, on/off, TWA,
Battery
Operating temperature -20°C to +55°C
Storage -25°C to +65°C (-13°F to +149°F)
Humidity 10 to 95 % RH
Ingress protection Independently tested to IP65 and IP67
Approvals
Compliance CE, FCC and ICES-003
Communications Interface Data connection for use with Portables Pro 2.0 PC Application
Charging options T4 Cradle Charger with multi-region power supply
* CO H2 Immune sensor option available
Sensors may be degraded at the higher temperatures subject to individual sensor specications
, H2S, CO*, FLAM Pellistor
2
35mm x 135mm x 80mm (1.4 x 5.3 x 3.1 inches)
Visual – all angle dual red/blue LEDs
Vibrating alert
+ve Safety™
(Approximately 78,000 logs)
(Approximately 3500 events)
Rechargeable lithium-ion battery
Up to 18 hours runtime
Typical charge time 5.5 hours
IECEx : Ex d ia IIC T4 Gb Tamb -20°C to +55°C
ATEX:
II 2 G Ex d ia IIC T4 Gb Tamb -20°C to +55°C
UL: Gas detector use in hazardous locations Class 1 Division 1
Groups A, B, C and D only as to intrinsic safety
Marine Equipment Directive:
Lloyds Certicate Number : MED 1500019
Complies with EMC Directive 2004/108/EC
T4 10 Way Charger with multi-region power supply
T4 Vehicle Charger with auxiliary input adaptor
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Part Number Description
T4-CRD T4 Cradle Charger with multi-region power supply
T4-TWC T4 10 Way Charger with multi-region power supply
E011166 T4 10 Way Charger multi-region power supply
T4-VHL T4 Vehicle Charger with auxiliary input adaptor
T4-VHL-BR INMETRO T4 vehicle charger, includes vehicle charging adaptor
CH0106 Vehicle Charger auxiliary input adaptor
CH0103 USB communications lead (not powered)
CH0104 USB communication and power lead
T4-EXT-F T4 Sensor Filter Plate
T4-CAL-CAP T4 calibration/bump test plate
T4-ASP-CAP T4 Aspirator Plate
AC0504 Hand aspirator bulb
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6. Troubleshooting
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6.1 T4 Fault / Warning / Information Descriptions
6.1.1 Service Faults
If T4 detects an internal fault that requires T4 to be returned for
servicing ‘Service’ message as shown will be displayed on the
screen, where ‘XX’ represents a specic fault ID code.
If T4 displays a service fault message T4 will not operate normally
and must be returned to a service centre for further investigation and
repair. No user intervention is possible.
6.1.2 Fault/Warning/Information Messages
T4 may indicate a fault or warning that requires user to intervention to resolve, or T4 may provide
additional information on instrument status.
The table below provides further details on these faults, warnings and information messages
including the fault message/symptom, the cause and the user action required.
Fault codes as listed in the table below are not displayed in the display message in all cases, but any
active fault code can be viewed via the information screen as detailed in Section 2.8.2.
Fault /
Warning/Fault Display Image Status/Cause Operator
Warning
ID
71 “BATTERY LOW”
“ID71”
The battery icon will
also be ashing with
no segments.
0
“BATTERY EMPTY”
“FAULT00”
The battery icon will
also be ashing with
no segments.
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Battery Low
T4 battery has
typically a maximum
30 minutes run time
before the battery will
be depleted.
Battery Exhausted
T4 battery is
exhausted & T4 will
auto shutdown 15
seconds.
Action
Click operator
button to clear
warning.
Charge T4 as
soon as possible.
Recharge T4
battery.
Fault /
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Warning/Fault Display Image Status/Cause Operator
Warning
ID
73 “CHARGER
SHUTDOWN”
“ID 73”
Charger Shutdown
T4 has been placed
on charge whilst T4
is powered on for a
prolonged period.
T4 will auto
shutdown after 15
seconds to prevent
circuit damage.
Action
If T4 requires
charging no action
required, T4 will
auto switch off and
continue charging.
If T4 is removed
from the charger
it will not auto
switch off and
continue operating
normally.
21 “TIME LOST”
(Displayed during
start up)
74 “BUMPDUE”
“LOCKED”
25 “CAL DUE”
“LOCKED”
Time & Date Lost
T4 has detected its
internal time and
date has been lost.
Bump Locked
A bump test is due
and T4 is congured
to lock on bump due.
Calibration Locked
Calibration is due
and T4 is congured
to lock on calibration
due.
T4 time and date
must be reset to
ensure correct
operation.
This can be reset
utilising Portables
Pro 2.0 or by
placing T4 into
I-Test.
Perform a
bump test (or a
calibration) on
T4 to ‘unlock’ for
normal operation.
Perform a
calibration on
T4 to ‘unlock’ for
normal operation.
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Warning
ID
26
27
28
Warning/Fault Display Image Status/Cause Operator
Action
‘X’
Whilst in ‘zero menu’.
(The warning ID code
for each specic
gases is shown in the
adjacent column)
S
H
2
O
2
CO
Zero Failure
Displayed if the result
of a sensor zero was
a fail.
The ‘X’ indicates
which sensor has
failed the zero (in the
example all gases
failed the zero).
Ensure T4 is in
‘clean air’ and
repeat the zero
operation.
T4 must be
returned to a
service centre
for further
investigation and
repair if the zero
is not successful
when repeated.
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42
43
44
45
LEL
‘X’
Whilst in ‘autozero
function’.
(The recorded
warning ID code for
each specic gases is
shown in the adjacent
column)
H
S
2
O
2
CO
LEL
Autozero Abort
Displayed if an
autozero was
aborted due to T4
detecting gas being
present outside
acceptable limits.
The ‘X’ indicates
which sensor has
failed the zero (in the
example all gases
failed the zero).
Ensure T4 is in
‘clean air’ and
repeat the zero
operation.
T4 must be
returned to a
service centre
for further
investigation and
repair if the zero
is not successful
when repeated.
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Warning
ID
Warning/Fault Display Image Status/Cause Operator
Action
‘X’
Whilst in ‘bump menu’.
(The recorded
warning ID code for
each specic gases is
shown in the adjacent
column)
Bump Failure
Displayed if the result
of a bump test was
a fail.
The ‘X’ indicates
which sensor has
failed the bump test
(in the example all
gases failed the
bump test).
Repeat the bump
test operation.
T4 must be
returned to a
service centre
for further
investigation
and repair if the
bump test is not
successful when
repeated.
81
82
83
84
34
35
36
37
H
S
2
O
2
CO
LEL
‘X’
Whilst in ‘calibration
menu’.
(The recorded
warning ID code for
each specic gases is
shown in the adjacent
column)
S
H
2
O
2
CO
LEL
Calibration Failure
Displayed if the
result of a sensor
calibration was a fail.
The ‘X’ indicates
which sensor has
failed the calibration
(in the example all
gases failed the
calibration).
Repeat the
calibration
operation.
T4 must be
returned to a
service centre
for further
investigation
and repair if the
calibration is not
successful when
repeated.
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Warning/Fault Display Image Status/Cause Operator
Warning
ID
66 ”BUMP DUE”
“NOW”
(Displayed during
start up)
Bump Test due
T4 bump test is
overdue.
Action
Undertake a bump
test on T4.
This will clear
the bump due
warning.
67 “CAL DUE”
“NOW”
(Displayed during
start up)
“WARNING”
“ID 50”
This will then be
followed by the ‘home
screen’ displaying:
‘---‘ for the gas in
fault.
(The fault ID code for
the specic gases is
shown in the adjacent
column)
50
51
52
H
O
CO
S
2
2
Calibration Due
T4 calibration is
overdue.
Hardware Warning
T4 has detected
hardware fault with a
specic gas channel.
Undertake a
calibration on T4.
This will clear the
calibration due
message.
Click operator
button to clear
warning.
T4 must be
returned to a
service centre
for further
investigation and
repair.
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LEL
52
Fault /
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Warning
ID
58
59
60
61
77
78
79
Warning/Fault Display Image Status/Cause Operator
Action
“WARNING”
“ID 58”
This will then be
followed by the ‘home
screen’ displaying “▼”
for the gas in under
range.
(The fault ID code for
the specic gases is
shown in the adjacent
column)
S
H
2
O
2
CO
LEL
‘▲’
For the gas in over
range.
(The fault ID code for
the specic gases is
shown in the adjacent
column)
S
H
2
O
2
CO
Sensor under range
Indicates the sensor
is reading under
range.
Sensor over range
Indicates that the
sensor is reading
over range.
Ensure T4 is in
‘clean air’ and
undertake a zero
operation.
T4 must be
returned to a
service centre
for further
investigation
and repair if the
message seen
persistently.
Exit hazardous
area immediately,
over gassing of
sensors can cause
long term damage.
T4 should be gas
tested to ensure
no lasting damage
has occurred.
80
LEL
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Warning/Fault Display Image Status/Cause Operator
Warning
ID
1 “WARNING”
“ID 01”
14, 15, 16,
17, 18
22, 23 “WARNING”
“WARNING”
“ID 14”
(the warning ID shown
could be one of the
codes in the adjacent
column)
“ID 22”
(the warning ID shown
could be one of the
codes in the adjacent
column)
Firmware Fault
T4 has detected an
unexpected internal
rmware fault.
Conguration
Failure
T4 has detected a
conguration read or
write failure.
Logging Fault
T4 has detected it is
unable to store data
in the data or event
log.
Action
Click operator
button to clear
warning.
T4 has recovered
to safe state.
T4 must be
returned to a
service centre
for further
investigation
and repair if the
message seen
persistently.
Click operator
button to clear
warning.
T4 has recovered
to safe state.
T4 must be
returned to a
service centre
for further
investigation
and repair if the
message seen
persistently.
Click operator
button to clear
warning.
T4 has recovered
to safe state.
T4 must be
returned to a
service centre
for further
investigation
and repair if the
message seen
persistently.
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7. Appendices
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7.1 Sensor Limitations
The detector is not suitable for use in ambient temperatures above 55°C and electrochemical toxic
gas sensors may be degraded, reducing life at these temperatures. Water should not be allowed to
collect on the sensors as this may impede gas diffusion. Use with care in wet or humid environments
where water may condense on the sensors, and check response after use.
Persistent exposure to high levels of toxic gas can shorten the life of toxic sensors. Toxic sensors
may also be cross-sensitive to gases other than their specic target gas, and hence the presence of
other gases may cause the sensor to respond. If unsure, contact Crowcon or your local agent.
Use of high power radio transmitters in close proximity to the detector may exceed RFI immunity
levels and cause erroneous indications. If such problems are experienced, remove antennae to a
reasonable distance from the detector (e.g. 30 cm).
Standard units detect ammable gases using a catalytic ammable sensor which operates in the
presence of oxygen. It is advisable to check the oxygen concentration as well as the ammable gas
concentration before entering a conned space. Oxygen levels below 10% will reduce a ammable
gas reading.
The performance of catalytic sensors may be permanently degraded if exposed to silicones, sulphur
containing gases (such as H
S), lead or chlorine compounds (including chlorinated hydrocarbons).
2
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7.2 Crowcon contacts
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UK: Crowcon Detection Instruments Ltd
172 Brook Drive, Milton Park, Abingdon, Oxfordshire, OX14 4SD
+44 (0) 1235 557700 sales@crowcon.com
US: Crowcon Detection Instruments Ltd
1455 Jamike Avenue, Suite 100, Erlanger, KY 41018
+1 800 527 6926 salesusa@crowcon.com
NL: Crowcon Detection Instruments Ltd
Vlambloem 129, 3068JG, Rotterdam
+31 10 421 1232 eu@crowcon.com
SG: Crowcon Detection Instruments Ltd
Block 194 Pandan Loop, #06-20 Pantech Industrial Complex, Singapore, 128383
+65 6745 2936 sales@crowcon.com.sg
CN: Crowcon Detection Instruments Ltd
Unit 316, Area 1, Tower B, Chuangxin Building, 12 Hongda North Road,
Beijing Economic & Technological Development Area, Beijing, China 100176
+86 10 6787 0335 saleschina@crowcon.com
www.crowcon.com
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Warranty
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This equipment leaves Crowcon’s factory fully tested and calibrated. If within the warranty period of
two years from despatch, the equipment which includes battery and common sensors (see sensor
chart below) is proved to be defective by reason of faulty workmanship or material, we undertake at
our option either to repair or replace it free of charge, subject to the conditions below.
Battery Warranty
All batteries degrade in performance over time and usage. For the purpose of this warranty it is
considered that two years use equates to 500 full charge / discharge cycles (fully empty to full) and
users should expect to see no greater than a 20% decline in run time after either this time or number
of cycles, whichever is sooner.
Sensor Warranty
Sensor Warranty Expected Life
Oxygen 2 years 2 years
Flammable (pellistor) 2 years Up to 5 years in air
Carbon monoxide 2 years >2 years
Hydrogen sulphide 2 years >2 years
Warranty Procedure
To facilitate efcient processing of any claim, contact your local Crowcon agent/distributor, a Crowcon
regional ofce or our global customer support team (English working language) on +44 (0)1235 557711
or customersupport@crowcon.com to obtain a returns form for identication and traceability purposes.
This form may be downloaded from our website ‘crowconsupport.com’ and requires the following
information:
• Your company name, contact name, phone number and email address.
• Description and quantity of goods being returned, including any accessories.
• Instrument serial number(s).
• Reason for return.
T4 will not be accepted for warranty without a Crowcon Returns Number (CRN). It is essential that the
address label is securely attached to the outer packaging of the returned goods.
The guarantee will be rendered invalid if the detector is found to have been altered, modied,
dismantled, tampered with, or has not used Crowcon spares for replacement parts (including sensors)
or has been serviced or repaired by any party not authorised and certied by Crowcon to do so. The
warranty does not cover misuse or abuse of the unit including use outside of specied limits.
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Warranty Disclaimer
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Crowcon accept no liability for consequential or indirect loss or damage howsoever arising
(including any loss or damage arising out of the use of the detector) and all liability in respect of any
third party is expressly excluded.
This warranty does not cover the accuracy of the calibration of the unit or the cosmetic nish of the
product. The unit must be maintained in accordance with the instructions in this manual.
The warranty on replacement consumable items supplied under warranty to replace faulty items, will
be limited to the unexpired warranty of the original supplied item.
Crowcon reserves the right to determine a reduced warranty period, or decline a warranty period
for any sensor supplied for use in an environment or for an application known to carry risk of
degradation or damage to the sensor.
Our liability in respect of defective equipment shall be limited to the obligations set out in the
guarantee and any extended warranty, condition or statement, express or implied statutory or
otherwise as to the merchantable quality of our equipment or its tness for any particular purpose
is excluded except as prohibited by statute. This guarantee shall not affect a customer’s statutory
rights.
Crowcon reserves the right to apply a handling and carriage charge whereby units returned as
faulty, are found to require only normal calibration or servicing, which the customer then declines to
proceed with.
For warranty and technical support enquiries please contact:
Customer Support
Tel: +44 (0) 1235 557711
Fax: +44 (0) 1235 557722
Email: customersupport@crowcon.com
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