GMI GS700 User manual

User Guide
Gasurveyor 700
Gas Measurement Instruments Ltd

2
Part Number: 49391
Issue: 2
Release Date: 28.03.18
Copyright
© 2016 Gas Measurement Instruments Ltd.
This user guide is copyright of Gas Measurement Instruments Ltd (GMI) and the information
contained within is for use only with Gasurveyor 700 instruments. Reproduction, in whole or part,
without written permission of GMI is prohibited.
Notication Icons
!Warning: Information to help prevent injury or damage
iNote: Notes, tips or additional information

3
Essential Health & Safety Requirements
General
• Read and understand this user guide before operating.
• The instrument must be regularly serviced and calibrated by fully trained personnel in a safe
area.
• Only GMI replacement parts should be used.
• Substitution of components may impair intrinsic safety.
• If the instrument detects gas, follow your own organisation’s procedures and operational
guidelines.
• This equipment is designed and manufactured to protect against other hazards as dened
in paragraph 1.2.7 of Annex II of the ATEX Directive 2014/34/EU.
Battery / Charging
• Alkaline and rechargeable batteries must be exchanged in a safe area and tted correctly
before use.
• Never use damaged batteries or expose to extreme heat.
• Rechargeable batteries must be recharged in a safe area, using the GS700 Charging Cradle.
• Only use approved alkaline batteries.
• Do not mix old and new batteries.
Areas Of Use
• Do not use instrument in potentially hazardous atmospheres containing greater than 21%
Oxygen.
• Exposure to certain chemicals can result in a loss of sensor sensitivity. Where such
environments are known or suspected it is recommended that more frequent response
checks are carried out. Chemical compounds that can cause loss of sensitivity includes
Silicones, Lead, Halogens and Sulphur.
Storage, Handling And Transit
• Batteries should be removed if the instrument is stored for longer than 3 months.
• The instrument can contain electrochemical sensors. Under conditions of prolonged storage
these 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.
• The instrument is designed to handle harsh environments and is IP55 rated. If not subject
to misuse or malicious damage, the instrument will provide many years of reliable service.
Special Conditions Of Use
• Only use permitted external probes specied by certicate number.
• The equipment must not be subject to prolonged exposure to light when not in use.
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.
!

4
Equipment Parameters
GS700 Instrument:
Um: 6.78V (Rechargeable Battery, part number - 49221)
Temperature Range: -20oC ≤ Ta ≤ 50oC
GS700 Charger:
Um: 250V
Uo: 6.78V
Temperature Range: -20oC ≤ Ta ≤ 44oC
Certication
Gasurveyor 700 instruments are certied as:
ATEX
II 2 G Ex db ia IIC T4 Gb -20oC ≤ Ta ≤ 50oC
*
II 2 G Ex db ia IIB T3 Gb -20oC ≤ Ta ≤ 50oC
SIRA 15 ATEX2299X
IECEx
Ex db ia IIC T4 Gb -20oC ≤ Ta ≤ 50oC
*
Ex db ia IIB T3 Gb -20oC ≤ Ta ≤ 50oC
IECEx SIR 15.0105X
CSA
Class I, Div.1 Groups A, B, C and D T4
Class I, Zone 1 AEx db ia IIC T4 Gb Ex db ia IIC T4 Gb
*
Class I, Div.1 Groups C and D T3
*
Class I, Zone 1 AEx db ia IIB T3 Gb Ex db ia IIB T3 Gb
* The GS7xx series is certied for use with for Gas Group IIC, Temperature Classication T4
except when the PPM gas sensor is tted. With a PPM gas sensor tted either internally or
externally the GS7xx is certied for Gas Group IIB and Temperature Classication T3.

5
Additional Safety Details - CSA Only
CAUTION: Before each days Usage, test on a known concentration of methane, equivalent to
25 - 50% of full scale concentration. Accuracy must be within 0 to +20% of actual. Accuracy
may be corrected by calibration. (Refer to Chapter: ‘CALIBRATION’).
ATTENTION: Avant chaque utilisation journalière, testez la réaction de l’appareil en utilisant
une concentration connue en méthane, correspondant à 25-50% de la lecture à fond d’échelle.
La précision doit se situer entre 0 et +20% de la valeur réelle. La précision peut se corriger en
étalonnant l’appareil (voir Chapitre: CALIBRATION).
CAUTION: Any rapid up-scale readings followed by a declining or erratic reading may indicate a
gas concentration beyond the upper scale limit, which may be hazardous.
ATTENTION: Toute lecture dépassant rapidement le maximum de l’échelle et suivie par une
diminution ou une lecture erronée, indique une concentration de gaz supérieure à la valeur
maximale de cette échelle. Cette lecture n’est pas signicative.
CAUTION: Substitution of components may impair intrinsic safety.
ATTENTION: le remplacement d’un composant peut porter atteinte à la sécurité intrinsèque du
produit.
CAUTION: Do not charge in a hazardous area. Um = 6.78V.
ATTENTION: Ne pas charger en zone dangereuse. Um = 6.78V.
NOTE: CSA have only assessed the LEL combustible gas detection portion of this instrument
for performance.
NOTE: CSA a seulement évalué la partie LIE pour la mesure des performances en détection de
gaz inammables.
CAUTION: Electromagnetic interference (EMI) signals may cause the instrument operation to
become erroneous.
NOTE: The instrument contains internal checking of sensor sensitivity, which during calibration
will prevent the sensor being calibrated if it has been contaminated or reached its end of life. In
addition to this the Instrument Management System (IMS) can be used to track the condition of
sensors from stored calibration results.

6
Contents
Notification Icons.................................................................................. 2
Copyright............................................................................................... 2
Essential Health & Safety Requirements ........................................... 3
General ..............................................................................................................................3
Battery / Charging .............................................................................................................3
Areas Of Use.....................................................................................................................3
Storage, Handling And Transit............................................................................................3
Special Conditions Of Use.................................................................................................3
Equipment Parameters......................................................................................................4
Certification ........................................................................................... 4
Additional Safety Details - CSA Only .................................................................................5
Getting Started...................................................................................... 9
Overview ...........................................................................................................................9
Key Features......................................................................................................................9
Display ............................................................................................................................. 10
Soft-Keys.......................................................................................................................... 10
Status Bar ........................................................................................................................ 11
Gas Ranges .....................................................................................................................11
Battery Packs...................................................................................................................12
Operation............................................................................................. 13
Switch On ........................................................................................................................13
Warm-up Sequence.........................................................................................................13
Switch Off........................................................................................................................14
Soundness Test (Optional) ...............................................................................................15

7
Modes of Operation............................................................................ 16
Gas Leak Outdoors (GLO) ............................................................................................... 17
Barhole Testing ................................................................................................................18
Conned Space Monitoring (CSM) ..................................................................................20
Purge ...............................................................................................................................22
Search..............................................................................................................................22
Pipeline Gas Test .............................................................................................................23
Alarms ................................................................................................. 24
Alarm Acknowledge.........................................................................................................24
Gas Alarm Types ..............................................................................................................25
Alarm Mute......................................................................................................................27
Condence Signal ...........................................................................................................27
Fault Alarm Types.............................................................................................................28
Battery / Charging............................................................................... 30
Replacing Alkaline Batteries.............................................................................................30
Recharging the Battery Pack............................................................................................32
Replacing the Battery Pack ..............................................................................................35
Maintenance........................................................................................ 36
Cleaning...........................................................................................................................36
Probe Handle Filter Replacement....................................................................................36
Replacing the Dust Filter .................................................................................................37
Calibration........................................................................................... 38
Automatic Calibration ......................................................................................................38
Manual Calibration ...........................................................................................................38
Calibration Validity............................................................................................................38
Accessories / Spares........................................................................... 39
Accessories .....................................................................................................................39
Common Spares..............................................................................................................40

8
Specification........................................................................................ 41
Instrument Performance..................................................................................................41
Instrument Specication..................................................................................................42
Alarm Set-points..............................................................................................................43
Soft-Key Button Glossary.................................................................................................44
Appendix A.......................................................................................... 45
Field Calibration (Optional)...............................................................................................45
Warranty ............................................................................................. 47
Liability ................................................................................................ 47
Customer Support .............................................................................. 47
Disposal .............................................................................................. 47
Contact Details.................................................................................... 48

9
Getting Started
Overview
The Gasurveyor 700 (GS700) is the rst choice
for all gas utility applications.
Reliable measurements are performed using
innovative infrared sensing technology including
instantaneous conrmation that the gas sample
is natural gas.
This lightweight, rugged instrument is easy to
use thanks to an intuitive menu layout on a large
display.
Key Features
Gas Exhaust
Semiconductor
Probe Connection
(Optional)
Harness Clip
Base Screw
(Battery Pack)
Base Screw
(Battery Pack)
Visual Alarm
(360oLED bar)
Buzzer
Gas Inlet Nozzle
(with dust lter)
Charging Contacts
(Rechargeable only)
Harness Clip
Visual Alarm
(360oLED bar)
Right
Left

GS700 USER GUIDE
10
To p
Soft-Keys
(includes power key)
Display
Visual Alarm
Visual Alarm
Display
The GS700 is a fully congurable instrument, the menu structure and information displayed may
vary.
Soft Key Options
Status Bar
Gas Readings /
Information Window 1
Gas Readings /
Information Window 2
iThe above display will be used throughout this user guide as the example main display.
Soft-Keys
The GS700 has 4 soft-keys performing different operations depending on mode and function.
The soft-keys shall be referred to as B1, B2, B3, and B4 throughout this user guide.
iB1 also acts as power on / off.
iFor soft-key menu options, see “Soft-Key Button Glossary”.
B1
B2
B3
B4

GETTING STARTED
11
Status Bar
Displays current operating mode. Icons provide information about instrument status.
Status Bar
Status bar icons:
Icon Description
Battery
The current battery level.
Datalogging
A manual or automatic datalog is being undertaken.
Geiger - audible & visual alarms off
The audible and visual alarms are switched off when using the Geiger feature.
Geiger - audible alarm on
The audible alarm is present when using the Geiger feature.
Geiger - visual alarm on
Visual alarms are present when using the Geiger feature.
Geiger - audible & visual alarm on
The audible and visual alarms are present when using the Geiger feature.
GPS
The location of the instrument has been found.
If ashing the instrument is acquiring a GPS location.
Pump
The pump is operating at high speed.
Gas Ranges
The GS700 can detect the following:
• Infrared measurement of ammable gases (ppm, LEL & volume) - e.g. Methane, Butane
• ppm ammable gas via sensor or external semiconductor probe
• Oxygen
• Toxic gases - e.g. Carbon Monoxide, Hydrogen Sulphide
• Differentiation between Pipeline Gas (natural gas) and Non Pipeline Gas (e.g. Landll or
swamp gas)
iFor more details, see “Instrument Performance”.

GS700 USER GUIDE
12
Battery Packs
The GS700 has 2 battery options:
• Alkaline.
• Lithium-Ion rechargeable, fully charge before rst use.
!Only use GMI approved batteries and chargers. Batteries must be charged (or replaced)
in a safe area.
iFor further information, see “Battery / Charging”.
Battery Level
• Battery level is displayed during GS700 warm-up.
• During operation, the battery icon shows the
battery level.
Icon Status Battery Level
0% - 24%
25% - 49%
50% - 74%
75% - 100%
Battery Run Time
Battery Type Run Time *
Alkaline 15 hours
Rechargeable 20 hours
*approximate
!Times based on normal
operation at ambient
temperatures.

13
Operation
Switch On
• Press and hold B1 for 1 second.
• The instrument will go through a warm-up sequence.
!Always switch the instrument on in fresh air.
Warm-up Sequence
iTypical warm-up sequence.
1. GMI logo and instrument type.
Progress Bar increases during warm-up (~60s).
2. Instrument:
• Type
• Serial number
• Software version
• Battery level
3. Date and time.
4. Alarm levels.

GS700 USER GUIDE
14
5. Sensor zero check.
6. Sensors are zeroed correctly.
7. Typical operating display.
Switch Off
• Press and hold B1 for 3 seconds.
iTo abort switch off, release B1.

OPERATION
15
Soundness Test (Optional)
A soundness test veries the instrument and probe are not
leaking.
• A soundness test is performed during instrument
warm-up.
• Block the gas inlet (sample path).
• The test will last for 5 seconds.
• If the instrument and probe are not leaking the
soundness test will pass.
• Unblock the gas inlet (sample path) to continue.
• If a leak is detected, in the instrument or probe, the
soundness test will fail.
• Once the leak has been rectied, press B4 to retry.
iThe GS700 cannot be used until the soundness
test has passed.

16
Modes of Operation
The user can congure the GS700 to have up to 4 modes
of operation, including:
• Gas Leak Outdoors (GLO) with or without Barhole
testing
• Gas Leak Indoors (GLI)
• Conned Space Monitor (CSM)
• Purge
• Search
iPipeline Gas Test is an optional feature, when
congured can be active in ALL modes of operation,
except for CSM.
• Press
B4 to display additional features.
• Pressing
B4 will display the congured modes of
operation.
iMode selection will be displayed for 5 seconds.
• To enter ‘Conned Space’ mode, press B2.
iSelected mode is displayed in the status bar.

MODES OF OPERATION
17
Gas Leak Outdoors (GLO)
In this mode, the GS700 acts as a gas indicator drawing
a gas sample, via a probe, where gas is suspected to be
present. Alarms are disabled.
Typical features:
• Pump control
• Ability to measure various gas ranges
• Barhole testing
• Manual datalogging
• Sensor zeroing
iGas Leak Indoors (GLI) mode contains the same
features, except for Barhole testing.
Pump Control
The pump must be ON to draw a gas sample. By default
the pump is switched ON.
• Press
B1 to toggle the pump OFF / ON
iFunctionality is disabled when the pump is OFF.
Additional Functions
• Pressing B4 displays additional features.
E.G.:
• Press
B1 - manual datalog (Log)
• Press B2 - Barhole testing (B/H)

GS700 USER GUIDE
18
Barhole Testing
Barhole testing is contained within GLO mode.
Barholes are small holes placed, in the ground, along the route of an underground gas pipe. Gas
leak detection is performed by placing a probe into the barhole.
The GS700 stores the following measurements when barhole testing:
• LEL / Volume Gas readings - peak and sustained
• Time and date
• GPS location
iAlarms and pump control are disabled during a
barhole test.
To perform barhole testing:
1. Ensure the instrument is set to GLO mode.
2. Press
B4 for additional functions.
3. Press
B2 to select barhole testing (B/H).
4. Press
B1 to start a new barhole series.
Press B4 to continue with a previous series.
5. Press
B1 to start at ‘Barhole number 01’.
To display different barhole numbers, press button B2
and B3 to move through the barhole numbers.
Press B4 to exit.
iEach series can store up to 25 barhole numbers.

MODES OF OPERATION
19
6. The test can be aborted at any time by pressing B1.
7. The result of ‘Barhole number 01’ is displayed on
completion. At this point, the instrument must be
purged, press B1.
To view the results of other barhole tests, press B2
and B3 to move through the results.
8. The next barhole number will be displayed.
Repeat steps 5 -7 to test ‘Barhole number 02’.
9. If you wish to repeat (overwrite) a barhole test, e.g. at
No. 1, press B3 until ‘Barhole number 01’ is displayed.
Press B1 to test ‘Barhole number 01’ again.
10. Press
B1 to conrm and overwrite ‘Barhole number
01’.
Press B4 to reject and return to the previous display.
11. Press
B4 to exit barhole testing.

GS700 USER GUIDE
20
Conned Space Monitoring (CSM)
In this mode the GS700 acts as a safety monitor for use when entering conned spaces which
may contain hazardous gas mixtures.
Typical features:
• Automatic datalogging (default - 60 seconds)
• View maximum / minimum / STEL / LTEL gas
readings
• View alarm set-points
• Visual / Audible alarms
• Condence Signal
iThe pump is always ON in CSM mode.
iA zero fault cannot be zeroed in CSM mode. Change
mode to zero. Always zero in fresh air.
View Gas Readings / Alarm Set-points
1. By pressing B3, the menu sequence to view measured
gas readings and alarm set-points are displayed.
iThe display will return to the CSM normal display,
after 5 seconds.
2. Maximum readings.
Press B1 to return to the CSM normal display (Live).
Press B3 to continue.
Press B4 to reset the readings.
3. Minimum readings.
Press B1 to return to the Live display.
Press B3 to continue.
Press B4 to reset the readings.
4. STEL readings for toxic gases.
Press B1 to return to the Live display.
Press B3 to continue.