Gasurveyor 11-500
(CGI / Inert)
User Handbook
GASURVEYOR 11-500 USER HANDBOOK
Issue 1
03/11/06
Part Number: 42212
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Copyright
Gas Measurement Instruments Ltd 2001
©
COPYRIGHT
This User Handbook is copyright of Gas Measurement Instruments Ltd (GMI) and
the information contained within, is for use only with the Gasurveyor 11-500
instrument. Reproduction, in whole or in part, including utilisation in machines
capable of reproduction or retrieval without written permission of Gas Measurement
Instruments Ltd is prohibited. Reverse engineering is not permitted.
LIABILITY
Every care has been taken in the preparation of this document, but GMI Ltd do not
accept any responsibility for errors or omissions and their consequences. Information
in this document is subject to change without notice. This document does not constitute
a specification or basis for a contract. Your statutory rights under law are not affected.
MODIFICATION NOTICES
GMI aim to notify customers of relevant changes in the product operation and maintain
this manual up to date. In view of the policy of continuous product improvement
there may be operational differences between the latest product and this manual.
This Handbook is an important part of the Gasurveyor 11-500 product. Please note
the following points:
It should be kept with the instrument for the life of the product.
Amendments should be attached.
This Handbook should be passed on to any subsequent owner/user of the
instrument.
Although every care is taken in the preparation of this Handbook it does not
constitute a specification for the instrument.
SOFTWARE
Software supplied on EPROM or similar device for use in a particular product, may
only be used in that product and may not be copied without the written permission of
Gas Measurement Instruments Ltd. Reproduction or disassembly of such embodied
programmes or algorithms is prohibited. Ownership of such software is not
transferable and GMI Ltd does not warrant that the operation of the software will be
error free or that the software will meet the customers requirements.
DISPOSAL ADVICE
When no longer in use, dispose of the instrument carefully and with respect for the
environment. GMI will dispose of the instrument without charge if returned to the
factory.
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GASURVEYOR 11-500 USER HANDBOOK
SAFETY
The instrument must be regularly serviced and calibrated by fully trained
personnel in a safe area.
Batteries: Alkaline batteries or *Rechargeable battery pack must be
exchanged (*and recharged) in a safe area and fitted correctly before use.
Never use damaged batteries or expose to extreme heat.
See Section 4 : OPERATOR MAINTENANCE.
Only GMI replacement parts should be used.
If the instrument detects gas, follow your own organisations procedures and
operational guidelines.
The combustion chamber is a flameproof assembly and must not be opened
in the presence of a flammable atmosphere.
Gasurveyor 11-500 instruments are certified as EEx iad IIC T4
This equipment is designed and manufactured to protect against other
Any right of claim relating to product liability or consequential damage to any third
party against GMI is removed if the warnings are not observed.
AREAS OF USE
Exposure to certain chemicals can result in a loss of sensitivity of the flammable
sensor. Where such environments are known or suspected it is recommended that
more frequent response checks are carried out. The chemical compounds that can
cause loss of sensitivity include Silicones, Lead, Halogens and Sulphur. Do not
use instrument in potentially hazardous atmospheres containing greater than 21%
Oxygen. The enclosure material is polypropylene and must not be exposed to
environments which are liable to result in mechanical or thermal degradation or to
damage caused by contact with aggressive substances. Additional protection may
be required in environments where the instrument enclosure is liable to damage.
STORAGE, HANDLING AND TRANSIT
The batteries in the rechargeable pack contain considerable energy and care should
be taken in their handling and disposal. Battery packs should be removed if the
instrument is stored for longer than 3 months. The instrument is designed to handle
harsh environments. The sensing elements are sealed to IP54 and the rest of the
instrument to IP64. If not subject to misuse or malicious damage, the instrument
will provide many years of reliable service. The instrument contains electrochemical
sensors with a life of 2 years. Under conditions of prolonged storage the sensors
should be removed. The sensor contains potentially corrosive liquid and care should
be taken when handling or disposing of the sensor, particularly when a leak is
suspected.
<
(-20oC
Tamb < 50oC). BAS01ATEX2292 II 2 G.
UL Class 1 Groups A, B, C and D.
hazards as defined in paragraph 1.2.7 of Annex II of the ATEX Directive
94/9/EC
ii
DECLARATION OF CONFORMITY
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GASURVEYOR 11-500 USER HANDBOOK
iv
REVISION RECORD
Date Issue Description Of Change
03/11/06 1 New Handbook
v
GASURVEYOR 11-500 USER HANDBOOK
vi
CONTENTS
COPYRIGHT ................................................................. i
LIABILITY ...................................................................... i
MODIFICATION NOTICES ........................................... i
SOFTWARE .................................................................. i
DISPOSAL ADVICE ...................................................... i
SAFETY ........................................................................ ii
AREAS OF USE ........................................................... ii
STORAGE, HANDLING AND TRANSIT .......................... ii
DECLARATION OF CONFORMITY ................. iii
REVISION RECORD ....................................... v
INTRODUCTION ............................................. 1
GENERAL INFORMATION ............................. 3
Ranges of Operation .................................................... 3
LEL, 0 to 100% ........................................................... 3
Volume Gas, 0 to 100 % ............................................ 4
Oxygen, 0 25% ....................................................... 4
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GASURVEYOR 11-500 USER HANDBOOK
Alarms ........................................................................... 5
Alarm Functions ......................................................... 6
Construction ................................................................. 7
Batteries ........................................................................ 7
Disposable Alkaline (LR20) Dry Cell Batteries ........... 7
Rechargeable Battery Pack ....................................... 8
Filters ............................................................................ 8
Liquid Crystal Display (LCD) ........................................ 9
Before Use Checks ...................................................... 9
OPERATING INSTRUCTIONS ....................... 11
Modes of Operation .................................................... 11
Switching On ........................................................... 12
Calibration Date Features ........................................ 13
Switching Off the Instrument Pump ......................... 13
Switching On in Purge Mode ................................... 14
Switching Off ........................................................... 14
Changing Range....................................................... 15
Summary of Button Operation ................................. 15
Operator Messages / Fault Flags ............................... 16
OPERATOR MAINTENANCE ....................... 19
Rechargeable Battery Pack........................................ 19
Standard Charger ..................................................... 19
Flatbed Charger ....................................................... 20
viii
CONTENTS
Smart Charger .......................................................... 20
Replacing the Battery Pack ...................................... 21
Recharging the Battery Pack ................................... 22
Replacing Alkaline (LR20) Dry Cell Batteries ............. 22
Filter Replacement ...................................................... 24
CALIBRATION .............................................. 27
Calibration Validity....................................................... 28
ACCESSORIES ........................................... 29
ADDITIONAL INFORMATION ........................ 33
Training ....................................................................... 33
World Wide Web ......................................................... 33
TYPICAL OPERATING PARAMETERS ....... A-1
Size ........................................................................ A- 2
Weight .................................................................... A- 2
Operating Temperature .......................................... A-2
Humidity .................................................................. A-2
Construction ........................................................... A -2
Display .................................................................... A-2
Sampling System.................................................... A-2
Power Source ........................................................ A-3
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GASURVEYOR 11-500 USER HANDBOOK
FIELD CALIBRATION .................................. B-1
Selectable Ranges in FCM........................................ B-3
Entering FCM ............................................................. B-3
Zeroing the Instrument ............................................. B-4
Field Calibration Procedure ....................................... B-5
Quitting FCM .............................................................. B-9
Quit And Save Changes ........................................ B-9
Quit Without Saving Changes ................................ B-9
OPERATING INSTRUCTIONS ..................... C-1
English..................................................................... C-2
Deutsch (German) .................................................. C-6
L'italiano (Italian) ................................................... C-10
Svensk (Swedish) ................................................ C-14
Dansk (Danish) ...................................................... C-18
Nederlands (Dutch) ............................................. C-22
INDEX ............................................................. I
x
1
INTRODUCTION
The Gasurveyor 11-500 is a two button instrument
designed to measure Lower Explosive Level, Volume
flammable gas and Oxygen. The instrument is designed to
the latest standards and is certified for use in Hazardous
Areas.
The Gasurveyor 11-500 contains the following ranges:
LEL, 0 to 100%
Volume gas, 0 to 100%
Oxygen, 0 to 25%
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GASURVEYOR 11-500 USER HANDBOOK
As the Gasurveyor 11-500 has a wide variety of available
user selected options, it is not possible to provide an
operator handbook specific to each possible variation,
therefore, what we have provided in the following pages
is the standard default of how the instrument would
generally be configured, with the possible options detailed
in italic text.
GMI recommend that you take the time to study your
instrument and, where practical and with advice from your
companys Purchasing / Management departments,
highlight your particular instrument configuration.
The main features of the instrument are:
Rugged carbon loaded polypropylene case, sealed
to IP54 rating and suitable for outdoor use.
Two button operation allowing the user access to
all features.
LCD with backlighting which displays the current
gas readings (in both digital and analogue forms)
together with operational and status information.
Audible and Visual alarm options. Alarm levels, if
selected, are pre-set with rising alarms for the LEL
flammable range and a rising and falling alarm for
oxygen.
Directly interfaces with the GMI Auto Test Cali-
bration Units.
2
2
GENERAL INFORMATION
Ranges of Operation
LEL, 0 to 100%
The LEL range indicates the explosivity of the flammable
gas in the sample. This is displayed as a percentage of the
lower explosive limit (LEL) of the gas. For methane 100%
LEL corresponds to 5% Volume methane in Air.
The instrument range is displayed in the top right corner
of the display as % LEL. From 0 to 10% LEL the digital
display resolves to 0.1% LEL. From 10 to 100% LEL the
digital display resolves to 1% LEL. The analogue bar
graph follows in 4% steps. An example of the LEL display
is shown in Figure 2.1. Autoranging will automatically
switch the range to Volume Gas when 100% LEL is
reached.
The detection principle for this range is a catalytic reaction.
Figure 2.1 LEL Range
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GASURVEYOR 11-500 USER HANDBOOK
Volume Gas, 0 to 100 %
This range displays the total volume of a specific
flammable gas with respect to air. The calibration gas is
shown on the service label and for the purpose of this
handbook is assumed to be methane. Instruments
calibrated for methane in air should only be used for
measuring such mixtures. To change the calibration gas,
e.g. from methane to propane, the instrument must be
recalibrated by suitably trained personnel.
On the Volume Gas range the instrument range is
displayed in the top right corner of the LCD as GAS. The
digital display resolves the signal to 1% GAS with the
analogue bar graph following in steps of 4%. Figure 2.2
shows the Volume Gas display. The detection principle
for the Volume Gas range is thermal conductivity.
Figure 2.2 Volume Gas Range
Oxygen, 0 25%
This range displays the percentage Oxygen content of the
sample. The instrument range is displayed in the top right
corner of the display as % O2. From 0 to 21% O2 the digital
display resolves to 0.1% O2. From 21 to 25% O2 the digital
display resolves to 1% O2. The analogue bar graph follows
in 4% steps.
4
GENERAL INFORMATION
The gas level is determined using an electrochemical cell,
which like toxic sensors is sensitive to pressure transients.
The oxygen cell has an expected life of two years.
Alarms
The Gasurveyor 11-500, by default, has both audible and
visual alarms off when operating.
The audible alarm is rated up to 85 dB(A). The visual
alarm is a red LED indicator which protrudes from the
instrument top plate, allowing viewing from any angle
above the top plate.
The instrument, by default,will have alarm levels for
Flammable LEL and Oxygen pre-set.
The Gasurveyor 11-500 has the facility to have two (2)
instantaneous alarm levels for the LEL range in the
instrument. These are described as LOW and HIGH,
although generally only the high alarm would be active.
The Oxygen range alarms are described as falling and
rising, and both are active when alarms are selected.
When both instantaneous alarms are set, the LOW
audible and visual alarm cycle will be activated for 0.5
seconds on and 0.5 seconds off. The HIGH audible and
visual alarm cycle will be activated for 0.25 seconds on
and 0.25 seconds off.
The option is to have the instantaneous alarms activated.
It is the responsibility of the user to ensure that the alarm
levels, where set in the instrument, are appropriate for
the safe operation and legal requirements for the country
/ industry in which the unit is being used.
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GASURVEYOR 11-500 USER HANDBOOK
Alarm Functions
The Gasurveyor 11-500, by default, has both audible and
visual alarms off when operating.
For each range in the instrument where the alarm function
is selected, the options are for audible and/or visual to
be latching or non-latching. That is, where an alarm level
is exceeded, the instrument LED flashes and/or the
sounder pulses rapidly. Latching alarms are cleared
manually, by a double press of Button Two , after the
detected gas level has fallen below the alarm limit.
Each alarm has to be acknowledged individually, e.g. If
both LOW (10%) and HIGH (20%) instantaneous alarms
have been set, then both would have to be acknowledged
individually if LEL is greater than 20%. If the audible
and/or visual indicators are set to off then the display
alarm function would need to be acknowledged in the
same way. Alarm display example is shown in Figure 2.3.
Figure 2.3 LEL Alarm Display Example
When an alarm limit for any gas range is exceeded the
LCD automatically displays the range in alarm. If more
than one alarm is active the highest priority alarm is
displayed. The alarm priorities are Oxygen, LEL.
Non-latching alarms clear automatically when the gas
levels fall below the alarm limit.
6
GENERAL INFORMATION
For both Latching and Non-Latching alarms, it is possible
for both audible and visual indicators to be either On or
Off independent of each other.
Construction
The instrument is housed in a tough, impact resistant,
moulded case made of carbon loaded polypropylene.
The top panel is protected by a stainless steel top plate
covering a toughened glass LCD cover.
The battery pack is sealed and attached to the main
instrument body by means of 2 stainless steel hexagonal
screws.
The instrument is sealed against dust and water to IP54
standard. The sensors are protected from dust and water
by membrane and cotton filters.
Batteries
Disposable Alkaline (LR20) Dry Cell Batteries
Alkaline batteries provide approximately 15 hours
operational life at ambient temperature of 20oC (68oF).
When the batteries are low or exhausted it is necessary to
fit 4 new batteries. Do not mix old and new batteries.
An indication of the battery condition is displayed after
power on and during warm-up, with status shown as either
OK or LO. If LO condition is displayed, a maximum
battery operational life of 120 minutes remains. During
operation the BAT alarm flag is displayed when
approximately 60 minutes of operating time remains at
7
GASURVEYOR 11-500 USER HANDBOOK
normal temperature. The instrument may continue to
be used until it switches off automatically.
Rechargeable Battery Pack
The GMI rechargeable battery pack provides
approximately nine hours operational life, from fully
charged, at ambient temperature of 20oC (68oF). An
indication of the battery condition is displayed after
power on and during warm-up, with status shown as
either OK or LO. If LO condition is displayed, a
maximum battery operational life of 90 minutes remains.
During operation the BAT flag is displayed when
approximately 30 minutes operating time is left at
normal temperatures. The instrument will then turn off.
There are three GMI Battery Chargers: a Standard
Charger, a Flatbed Charger and a Smart Charger. The
Smart Charger has both slow and fast charge options as
well as a serial link for communications with the
instrument. See Rechargeable Battery Pack in Section
4 OPERATOR MAINTENANCE.
Filters
A number of different filter types are available from
GMI. The minimum requirement is a cotton particulate
filter and a hydrophobic filter which are incorporated
in the probe handle assembly supplied with the
instrument. Filters must be checked at frequent intervals
and where appropriate changed to ensure a clean sample
path. If water is drawn into the instrument any filter
which has been contaminated must be cleaned or
8
GENERAL INFORMATION
replaced. See Filter Replacement in Section 4 OPERATOR
MAINTENANCE.
Liquid Crystal Display (LCD)
The LCD shows the current gas readings in both analogue
and digital form together with operational and status
information. The display is protected by a toughened glass
cover. Backlighting is provided to enable the display to
be seen under low ambient light conditions.
Before Use Checks
The following checks should be carried out before using
the instrument on site:
The instrument is clean and in good condition.
The batteries have sufficient power left in them
for the intended use of the instrument.
The filters are clean and in good condition.
The sample line and any accessories are in good
condition and leak free.
All gas ranges are operational and zeroed correctly.
The calibration is still valid.
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GASURVEYOR 11-500 USER HANDBOOK
10
3
OPERATING INSTRUCTIONS
Modes of Operation
The instrument has two modes of operation which are
accessed by switching the instrument ON with either
Button One or Button Two . See Figure 3.1
below.
ON
OFF
INST.
ON OFF
PUMP
RANGE
PURGE
ALARM ACK.
GASURVEYOR 11-500
Figure 3.1 Instrument Front Plate
Mode 1. Switching ON with Button One provides
three gas ranges
a) LEL autoranging to Volume Gas, and
b) Oxygen Range 0-25%.
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GASURVEYOR 11-500 USER HANDBOOK
Audible/visual alarms can operate in this mode.
Mode 2. Switching ON with Button Two provides
access to only 0-100% Vol Gas and 0-25% Oxygen for
purge applications. No audible/visual alarms are available
in this mode.
Switching On
Press and hold Button One to turn the instrument on.
This initiates the instruments warm up cycle and switches
on the pump. Figure 3.2 displays the warm up cycle for
the Gasurveyor 11-500.
12
Note: Battery status is displayed
as either OK or LO at start-up.
Figure 3.2 Warm Up
)
C
OPERATION
Calibration Date Features
At the end of warm-up and before the Gasurveyor 11500 instrument is ready for measuring, the instrument will
indicate on the display when the next calibration is due.
This will be displayed as month and year, as shown in
Figure 3.3:
alibration Due
February 2002
(Alternate flash
Figure 3.3 Calibration Date
The re-calibration interval pre-set for all Gasurveyor
11-500 instruments is twelve (12) months.
This period can be altered as an option, however, you
should ensure that the instrument is always within its
calibration period prior to use.
An option which ensures that an out of calibration
instrument is not used, is the automatic switch-off when
overdue.
Switching Off the Instrument Pump
A single press of Button One , when the pump is
running, turns the pump off and stops sampling. Pressing
button one again turns the pump back on.
13
GASURVEYOR 11-500 USER HANDBOOK
h)
Switching On in Purge Mode
To switch on in Purge mode, press and hold Button Two
. The Gasurveyor 11-500 will initiate the warm-up
sequence as explained previously. This mode uses the
Volume Gas and Oxygen ranges only. When in purge
mode, the PURGE flag is activated on the display, as
shown in Figure 3.4.
(Alternate flas
Figure 3.4 Purge Mode
Switching Off
A double press of Button One turns the instrument
off immediately.
The instrument switches off automatically after 30
minutes. OFF is shown in the top right hand corner of
the display. Pressing any button cancels this automatic
switch-off. The instrument will then allow another 30
minutes of use.
This 30 minute period is set as a default.
The switch off time may be altered to any time between 1
and 1000 minutes
14
OPERATION
Changing Range
Each single press of Button Two
changes the gas
range selected. The display cycles through the available
ranges as follows:
LEL/GAS Oxygen LEL/GAS (in ON mode)
Volume Gas Oxygen Volume Gas (in Purge mode)
Note: The instrument, by default, auto-ranges between
LEL and Volume Gas.
Summary of Button Operation
Measure
Mode
Button 1
Button 2
Single Press
Toggles Pump
On / Off
(during operation)
egnaRtxeN
LEL - O - LEL (On)
2
VOL - O - VOL (Purge)
2
Double
Press
tnemurtsnI
Acknowledge
Alarm
Press and
Hold
ffOsehctiwS
in Purge mode
OnsehctiwS
tnemurtsnI
OnsehctiwS
tnemurtsnI
15
GASURVEYOR 11-500 USER HANDBOOK
Operator Messages / Fault Flags
Various messages can appear on the LCD screen to
indicate instrument status.
SAMPLE
This indicates that the pump is running and the instrument
is sampling.
OFF
This indicates that the instrument is about to switch off.
This command can be cancelled by a single press of any
button.
SAMPLE FAULT
This indicates a problem with the instruments flow due
to the sample path being blocked, water ingress, a blocked
filter or pump failure.
In Measure mode, the pump stops automatically. The
sample line, filters etc. should be checked for water ingress
or blockage and Button One should then be pressed
to restart the pump.
CHECK ZERO
This indicates that there may have been a zero shift due
to the presence of gas. Switch off the instrument and
switch on again in fresh air.
ZERO FAULT
This indicates that the zero is outwith its calibration limits.
Switch the instrument off and then on again in fresh air.
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