GMI Gasurveyor 700 User Manual

Gasurveyor 700

Gas Measurement Instruments Ltd

User Guide

Part Number: 49391
Issue: 1
Release Date: 10.06.16

Notication Icons

Warning: Information to help prevent injury or damage

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Note: Notes, tips or additional information

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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.

2

Essential Health & Safety Requirements

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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 94/9/EC until 19th April 2016, and ATEX
directive 2014/34/EU from the 20th April 2016.

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.

3

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:

II 2 G Ex db ia IIC T4 Gb -20oC ≤ Ta ≤ 50oC

ATEX

IECEx

CSA

* 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.

* II 2 G Ex db ia IIB T3 Gb -20oC ≤ Ta ≤ 50oC

SIRA 15 ATEX2299X

Ex db ia IIC T4 Gb -20oC ≤ Ta ≤ 50oC

* Ex db ia IIB T3 Gb -20oC ≤ Ta ≤ 50oC

IECEx SIR 15.0105X

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

4

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.

5

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

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Modes of Operation ............................................................................ 16

Gas Leak Outdoors (GLO) ...............................................................................................17

Additional Functions ........................................................................................................ 17

Pipeline Gas Test (PGT) .................................................................................................... 18

Purge ...............................................................................................................................19

Search ..............................................................................................................................19

Barhole Testing ................................................................................................................20

Conned Space Monitoring (CSM) ..................................................................................22

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

Bump Test (Optional) .......................................................................... 38

Automatic Bump Test ......................................................................................................38

Manual Bump Test ...........................................................................................................38

Calibration ........................................................................................... 41

Automatic Calibration ......................................................................................................41

Manual Calibration ...........................................................................................................41

Calibration Validity ............................................................................................................ 41

7

Accessories / Spares ........................................................................... 42

Accessories .....................................................................................................................42

Common Spares ..............................................................................................................43

Specification ........................................................................................ 44

Instrument Performance .................................................................................................. 44

Instrument Specication ..................................................................................................45

Alarm Set-points ..............................................................................................................46

Soft-Key Button Glossary ................................................................................................. 47

Warranty ............................................................................................. 48

Liability ................................................................................................ 48

Customer Support .............................................................................. 48

Disposal .............................................................................................. 48

Contact Details .................................................................................... 49

8

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

Harness Clip

Semiconductor
Probe Connection

(Optional)

Base Screw

(Battery Pack)

Visual Alarm

(360o LED bar)

Right

Visual Alarm

(360o LED bar)

Gas Inlet Nozzle

(with dust lter)

Charging Contacts

(Rechargeable only)

Left

Harness Clip

Gas Exhaust

Base Screw

(Battery Pack)

Buzzer

9

GS700 USER GUIDE

Soft Key Options

Status Bar

Information Window 2

To p

Visual Alarm

Soft-Keys

(includes power key)

Display

Visual Alarm

Display

The GS700 is a fully congurable instrument, the menu structure and information displayed may
vary.

Gas Readings /
Information Window 1

Gas Readings /

The above display will be used throughout this user guide as the example main display.

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Soft-Keys

The GS700 has 4 soft-keys performing different operations depending on mode and function.

B1

B2

B3

B4

The soft-keys shall be referred to as B1, B2, B3, and B4 throughout this user guide.

B1 also acts as power on / off.

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For soft-key menu options, see “Soft-Key Button Glossary”.

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10

GETTING STARTED

Status Bar

Displays current operating mode. Icons provide information about instrument status.

Status Bar

Status bar icons:

Icon Description

Battery

Indicates the current battery level.

Datalogging

Indicates a manual or automatic datalog is being undertaken.

Geiger - audible & visual alarms off

Indicates the audible and visual alarms are switched off when using the Geiger
feature.

Geiger - audible alarm on

Indicates the audible alarm is present when using the Geiger feature.

Geiger - visual alarm on

Indicates visual alarms are present when using the Geiger feature.

Geiger - audible & visual alarm on

Indicates the audible and visual alarms are present when using the Geiger feature.

GPS

Indicates the location of the instrument has been found.
If ashing the instrument is acquiring a GPS location.

Pump

Indicates the pump is operating at high speed.

Gas Ranges

The GS700 can detect the following:

• Infrared measurement of ammable gases (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)

For more details, see “Instrument Performance”.

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11

GS700 USER GUIDE

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)

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Battery Level

in a safe area.

For further information, see “Battery / Charging”.

• 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 20 hours

*

Times based on normal

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operation at ambient
temperatures.

Rechargeable 20 hours

*

approximate

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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.

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Warm-up Sequence

Typical warm-up sequence.

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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. Sensor zero check.

13

GS700 USER GUIDE

5. Sensors are zeroed correctly.

6. Typical operating display.

Switch Off

• Press and hold B1 for 3 seconds.

To abort switch off, release B1.

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The next time the GS700 is switched on, the display will show the operating mode used

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prior to switch off.

14

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.

OPERATION

• 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.

The GS700 cannot be used until the soundness

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test has passed.

15

Modes of Operation

The user can congure the GS700 to have up to 4 modes
of operation, including:

• Gas Leak Outdoors (GLO)

• Pipeline Gas Test (PGT)

• Purge

• Search

• Conned Space Monitor (CSM)

• Pressing B4 will display the congured modes of

operation.

Mode selection will be displayed for 5 seconds.

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• To enter ‘Pipeline Gas Test’ mode, press B2.

Selected mode is displayed in the status bar.

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16

GS700 USER GUIDE

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

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

Functionality is disabled when the pump is OFF.

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Additional Functions

• Pressing B3 ‘Func’ displays additional features.

E.G.:

• Press B1 - Barhole testing (B/H)

• Press B2 - sensor zeroing (Zero)

Additional functions selection may also be displayed by a  soft key.

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17

Pipeline Gas Test (PGT)

In this mode, the GS700 is used to discriminate between
pipeline gas (natural gas) and non pipeline gas (e.g. landll
or swamp gas).

Typical features:

• Discrimination between gases

• Pump Control

• Sensor Zeroing

When sample testing, the GS700 discriminates the gas
and displays the results, as follows:

Pipeline Gas

MODES OF OPERATION

• Pipeline gas identied

• Peak gas reading displayed

• Green visual 360 LED’s activated

Non Pipeline Gas

• Non Pipeline gas identied

• Peak gas reading displayed

• Red visual top plate LED’s activated

The live result of the Pipeline gas test will be displayed
until the gas reading drops below the decision point
(approximately 20% LEL). The option to clear the result is
now presented.

• Press B3 to clear result and peak gas reading.

• The following test information is logged when each

result is cleared:

» Decision
» Peak reading
» Time and date
» GPS location

» User ID

18

GS700 USER GUIDE

PGT can be congured to be an additional feature running in the background. In this

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conguration, from any mode, detection of Non Pipeline Gas will be displayed.

Purge

In this mode, the GS700 aids in the purging of pipework
installations. Alarms are disabled.

Typical features:

• Pump Control

• Measuring ranges - volume gas or oxygen

• Sensor Zeroing

Search

In this mode, the GS700 is used for rapid leak detection.
Typical features:

• Measures 0 -10,000 PPM HC

• Pump Control

• Sensor Zeroing

• Audible and visual Geiger alarm (A/V), see “Geiger

Alarm”.

Pump Control

By default the pump is switched ON at normal speed.

• Press B1 to toggle the pump between normal

speed / high speed / OFF.

• A pump icon rotates to indicate high speed pump

operation.

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MODES OF OPERATION

Barhole Testing

Barhole testing is normally contained within a mode, e.g. 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

Alarms and pump control are disabled during a

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To perform barhole testing:

1. Ensure the instrument is set to GLO mode.

2. Press B3 for additional functions.

barhole test.

3. Press B1 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.

Each series can store up to 25 barhole numbers.

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20

GS700 USER GUIDE

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.

21

MODES OF OPERATION

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

The pump is always ON in CSM mode.

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A zero fault cannot be zeroed in CSM mode. Change

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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.

The display will return to the CSM normal display,

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2. Maximum readings.

3. Minimum readings.

after 5 seconds.

Press B1 to continue.
Press B3 to return to the CSM normal display (Live).
Press B4 to reset the readings.

Press B1 to continue.
Press B3 to return to the Live display.
Press B4 to reset the readings.

4. STEL readings for toxic gases.
Press B1 to continue.
Press B3 to return to the Live display.

22

GS700 USER GUIDE

5. LTEL readings for toxic gases.
Press B1 to continue.
Press B3 to return to the Live display.

6. HiHi alarm set-points.
Press B1 to continue.
Press B3 to return to the Live display.

7. Hi or Lo alarm set-points.
Press B1 to continue.
Press B3 to return to the Live display.

8. LoLo alarm set-points.
Press B1 to continue.
Press B3 to return to the Live display.

9. STEL alarm set-points.
Press B1 to continue.
Press B3 to return to the Live display.

10. LTEL alarm set-points.
Press B1 to continue.
Press B3 to return to the Live display.

11. Current readings.
Press B1 to continue to the maximum readings

display (see step 2).
Press B3 to return to the Live display.

23

GS700 USER GUIDE

Alarms

When measured gas levels go above or below the instrument alarm set-points, the following
alarms may be triggered:

• Audible - buzzer will sound (tone will differ depending on alarm type)

• Visual - 360o LED bar and top plate LED’s will ash red (ash will differ depending on

alarm type)

• Display - backlight turns red and alarm ags are displayed

Alarm agsDisplay backlight

- red

Top plate

alarm

Alarm Acknowledge

• The display will show the alarming gas level

alternating with the alarm ag.

• Alarms will stay latched until acknowledged by the

user.

360o LED bar

• Press B3 to acknowledge (Ack) the alarm. Only

when the gas levels are safe.

Non-latching alarms will reset automatically when

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the gas levels are safe.

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Alternates with

ALARMS

Gas Alarm Types

It is the responsibility of the user to ensure that the alarm set-points are appropriate for the

!

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Hi or HiHi Alarm

safe operation and legal requirements of the country / industry in which the instrument is
being used.

By default,gas alarms are set in accordance to international standards. How the instrument

responds to the alarm set-points being triggered is conguration dependant.

• Gas types with a Hi / HiHi alarm set-point.

» Flammable
» Oxygen
» Toxic

• The example shows a Flammable LEL alarm.

Lo or LoLo Alarm

• Oxygen is the only gas to have a Lo / LoLo alarm

set-point.

• The example shows an Oxygen alarm.

Alternates with

Alternates with

25

GS700 USER GUIDE

TWA Alarms

• A Time Weighted Average (TWA) gas level, is the

average gas level measured over a specic period
of time.

» Short Term Exposure Limit (STEL) - 15 minutes
» Long Term Exposure Limit (LTEL) - 8 hours

• Toxic gases have STEL / LTEL alarm set-points.

• The examples below show:

» H2S STEL alarm, with a gas reading of 12PPM and a STEL alarm ag.
» CO LTEL alarm, with a gas reading of 38PPM and a LTEL alarm ag.

Alternates with

Live readings are shown (not calculated averages).

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Over Range Alarm

• In the event of the ammable gas (LEL) sensor

being exposed to a high concentration of ammable
gas, the instrument has an over- range alarm.

• If the LEL sensor is exposed to a gas reading above

100% LEL, EEE will alternate with the HIHI alarm
ag.

Alternates with

26

Alternates with

Geiger Alarm

An audible and visual Geiger alarm, enabled in the PPM
Flammable range, provides indication of a larger gas
concentration via an increasing rate of sounder and LED
pulses.

Pressing B3 will change the audio / visual (A/V) indicator
options:

Key Press Geiger Indicators

B3 - A / V Display Icon Audible Visual

Default OFF OFF

ALARMS

1st Press ON OFF

2nd Press OFF ON

3rd Press ON ON

4th Press ­Returns to default

OFF OFF

Alarm Mute

If congured, the audible alarm can be muted for 60 seconds. However, the visual and displayed
alarms will remain active. After 60 seconds the audible alarm will reactivate.

When the audible alarm is muted and gas levels fall below the alarm set-points:

• Latching alarm - the visual / displayed alarms can be cleared (Ack) by pressing B3.

• Non-latching alarm - the visual / displayed alarms clear automatically.

Condence Signal

The condence signal is an audible (beep) and / or visual indication (360o LED bar - green LED’s),
every 10 seconds, that the instrument is operating correctly. The condence signal is enabled in
CSM mode only.

27

GS700 USER GUIDE

Fault Alarm Types

Sample Fault

A fault with the GS700 ow due to the sample path being
blocked, water ingress, a blocked lter or pump failure.

• Functionality is disabled and ‘Sample fault’ ashes

OFF and ON.

• Audible alarm, visual red LED’s on top plate and red

display backlight activate.

• The sample path and lters should be checked for

a blockage or water ingress.

• Once the blockage is cleared, press B1 to restart

the pump.

In CSM mode, once the blockage is cleared, the

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pump will automatically restart.

Zero Fault

Indication that the zero gas reading is outwith its calibration
limits.

• Zero alarm ag and %LEL alternate on the display.

• Audible alarm , visual red 360o LED bar activate.

Alternates with

Alternates with

• Press B2, to zero.

Always Zero in fresh air.

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28

Calibration Required

If congured, during instrument warm-up a ‘Cal Due’
message will be displayed.

• Press B1 to continue.

• Press B4 to switch off.

Alternatively, the ‘Cal Due’ message can be congured to
force the user to switch off the instrument.

• Press B4 to switch off.

ALARMS

29

GS700 USER GUIDE

Battery / Charging

The GS700 has 2 battery options:

• Alkaline.

• Lithium-Ion rechargeable.

When the battery level becomes low:

• ‘Low Bat’ message will ash on the display.

Battery life is now approximately 30 mins and the

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batteries require to be replaced or recharged.

Replacing Alkaline Batteries

Only use the following approved size ‘D’ (LR20) alkaline batteries:

!

• DURACELL - MN1300 or ID1300

• ANSMANN - INDUSTRIAL or XPOWER

• PANASONIC - EVOLTA

The following procedure should be carried out in a safe area.

!

Alternates with

1. Using the 4mm hex driver (supplied), loosen the 2 instrument base screws.

30

2. Remove the battery cover.

3. Remove the 3 old batteries.

BATTERY / CHARGING

4. Check battery compartment for damage to spring contacts or corrosion on springs.

5. Insert the 3 new batteries observing correct polarity. Polarity markings indicated in battery
compartment.

Do not mix old and new alkaline batteries. Do not use rechargeable batteries.

!

6. Replace battery cover and fasten the base screws.

31

GS700 USER GUIDE

Recharging the Battery Pack

The Lithium-Ion battery pack is recharged using the GMI charger cradle. The battery pack can be
charged tted to the instrument or separately.

Power LED

Only use GMI approved batteries and chargers. Batteries must be charged in a safe area.

!

To fully charge the battery pack takes up to 9 hours.

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Instrument Charging

1. Ensure the GS700 is switched off.

2. Ensure the charging cradle is switched on. Shown by the power LED (green).

3. Place the GS700 into the charging cradle, as illustrated.

Charging
Contacts

32

The alignment of the GS700, is moulded on the

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4. The charging icon on the instrument will ash until fully charged.

surface of the charger cradle.

BATTERY / CHARGING

5. On completion, remove from charging cradle, as illustrated.

Battery Pack Charging

1. Remove the battery pack from the instrument, see replacing the battery pack.

2. Ensure the charging cradle is switched on. Shown by the power LED (green).

3. Place the battery pack into the charging cradle, as illustrated.

33

GS700 USER GUIDE

Charging
Contacts

4. The orange LED on the battery pack indicates the battery pack is charging. When the LED
switches off, the battery pack is fully charged.

5. On completion, remove from charging cradle, as illustrated.

6. Fit the battery pack onto the instrument.

34

BATTERY / CHARGING

Replacing the Battery Pack

The following procedure should be carried out in a safe area.

!

1. Using the 4mm hex driver (supplied), loosen the 2 instrument base screws.

2. Remove the battery pack.

3. Insert new battery pack.

The battery pack can only be tted one way.

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4. Fasten the base screws.

35

GS700 USER GUIDE

Hydrophobic Filter

Cotton Particulate Filter

Probe Handle Assembly

Maintenance

Cleaning

Display Window

• An optical cloth MUST be used to clean the display window, as the window is susceptible

to scratches. In extreme cases a mild screen solution may be used with the optical cloth
to remove stubborn stains.

Outer Casing

• The outer, impact resistant, casing of the GS700 may be cleaned using a non-abrasive

damp cloth. Rub the cloth over the outer casing to remove any dirt and grime. In extreme
cases, a mild soap solution may be used with a non-abrasive cloth to remove stubborn
marks.

Do not use polishes containing silicon or solvent to clean the instrument as these may

!

!

affect the gas sensors.

Do not use abrasive materials or strong volatile chemical solutions as these could damage

the impact resistant casing.

Probe Handle Filter Replacement

Hydrophobic and cotton particulate lters in the probe handle minimise the danger of water and
dust ingress.

If a blockage occurs, the message ‘SAMPLE FAULT’ will be displayed. Check the sample line and
probe handle for a blockage. When cleared, press B1 to continue.

Replace the lter(s) if the message does not clear.
To replace the lter(s):

1. Unscrew the probe handle assembly.

2. Remove the cotton particulate lter and
discard.

3. Remove the hydrophobic lter.

4. Clean the probe handle to make sure it’s

5. Fit a new cotton particulate lter.

6. Fit the new hydrophobic lter. The yellow

7. Reassemble the probe handle assembly.

free from dirt and water.

label on the lter ts against the yellow
label on the probe handle.

36

MAINTENANCE

Inlet NozzleDust Filter

Replacing the Dust Filter

Cotton particulate (dust) lters, minimise the danger of dust ingress.
Removing the inlet nozzle allows access to the dust lter.

1. Using a small coin or appropriate sized flat bladed screwdriver, remove the inlet nozzle.

2. Remove the dust lter from the inlet nozzle.

The dust lter should be removed for inspection periodically.

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3. Clean the inlet nozzle to make sure it’s free from dirt and water.

4. Fit a new dust lter into the inlet nozzle.

5. Fit the inlet nozzle.

Ensure the inlet nozzle screw thread is correctly located, before tting.

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The GS700 must never be switched on without suitable lters installed.

!

37

GS700 USER GUIDE

Bump Test (Optional)

A bump test veries sensor response and alarm operation by exposing the GS700 to a known
concentration of gas.

Different methods of bump test are available:

• Automatic bump test

• Manual bump test

When performing a bump test, the test

!

Automatic Bump Test

gas concentration should be high enough
to trigger the instrument’s alarms.

The Gas Delivery Unit (GDUnet) is used to
perform automatic bump tests. The GDUnet
provides controlled delivery of test gas via one
of the following applications:

• Instrument Management System (IMS)

• PC / exiCal Plus software

• Standalone Mode

Automatic bump test equipment, consisting of both hardware and software, are

i

manufactured by GMI. For further details contact GMI or an authorised distributor.

Manual Bump Test

Requires the user to control the delivery of gas during
testing.

The following kit is required to perform a bump test:

• Calibration Test gases

• On demand regulator valve

• Sample tubing

To perform a manual bump test, follow this process:

1. Press B4 to switch on the GS700. If enabled, ‘Bump’
will be displayed in the bottom right hand corner.

38

2. After instrument warm-up the bump test menu will
be displayed. Gas should now be applied to the
instrument.

The bump test can be aborted at any time by

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3. Connect the ‘On Demand Flow Regulator’ to the gas

4. Connect the tubing from the regulator to the

5. When the measured gas reading is within congured

pressing B4.

cylinder.

instrument inlet nozzle.

limits the audible and visual alarms will be present
followed by ‘PASS’ displayed next to the tested gas.

BUMP TEST

6. Follow steps 3-5 for remaining gas ranges. When
complete all gas ranges should show ‘PASS’.

7. Next, the display will automatically move onto a
request for conrmation that audible and visual alarms
were present.

Press B1 to conrm.

8. Purge the instrument of gas, back to air. The display
will then return to the normal operating display.

On completion of a manual bump test, the result is

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stored in the instrument.

39

GS700 USER GUIDE

Bump Fail

A manual bump test will fail if:

• A measured gas reading is above / below the

congured limit.

• The audible and visual alarms fail to alert the user.

Press B4 to conrm a fail.

The instrument must be switched off, press B1 for 3
seconds.

Should an instrument fail a bump test, recalibration

!

MUST be performed.

40

Calibration

The GS700 has been calibrated for a particular ammable gas mixture.

Where any doubt exists the instrument should be returned to GMI or an authorised

!

Different methods of calibration are available:

Automatic Calibration

The fully automatic Gas Delivery Unit (GDUnet)
provides controlled delivery of gas via one of the
following applications:

distributor for calibration.

• Automatic Calibration

• Manual Calibration

• Instrument Management System (IMS)

• PC / exiCal Plus software

• Standalone Mode

Manual Calibration

Requires the user to control the delivery of gas during calibration.
GMI’s exiCal Plus software facilitates:

• Setting up of the calibration test.

• Step by step instruction during calibration.

• Storage of test results les.

Both automatic and manual calibration methods, consisting of both hardware and

i

software, are manufactured by GMI. For further details contact GMI or an authorised
distributor.

Calibration Validity

Calibration validity is the responsibility of the user. Under normal operating conditions 12 month
period can be expected. This is no guarantee, however, as the precise application of the product
is unknown to GMI. Individual codes of practice may dictate shorter periods.

Regular checking establishes a pattern of reliability and enables the calibration check to be modied
in line with operational experience. The higher the risk, the more frequently the calibration should
be checked.

41

GS700 USER GUIDE

Accessories / Spares

Accessories

GMI Part No. Part Description

49460

14750X(Q)

99118

12712

12393

42700

42800

Charger cradle c/w universal power supply

Auto calibration package c/w GDUnet, s/w & 6 mm ttings
(Q - for 1/4 in. ttings)

On demand regulator valve

Clear sample line (order per metre)

Plastic probe - 80 cm solid end

Extended survey probe assembly ­c/w bellows probe

Extended survey probe assembly ­c/w swan neck probe

42200

Semiconductor exi probe assembly (GS700 MUST be tted
with a semiconductor probe connection)

42

Common Spares

GMI Part No. Part Description

49221

10278

12451

67163

12358

10077

42197

Rechargeable Battery Pack

Alkaline Battery (Duracell Procell MN1300)

Hex Driver

Instrument Dust lter - Box of 30

Probe Hydrophobic lter

Probe Cotton lter - Box of 10

Semiconductor exi probe assembly lter disc

For a comprehensive list of accessories, probes, spares and calibration gases, contact

i

your local distributor, or alternatively, GMI Ltd.

43

GS700 USER GUIDE

Specication

Instrument Performance

Gas Sensor Type Range Resolution

ppm Semiconductor

LEL Infrared

Volume Gas Infrared

CO Electrochemical 0 - 1000 ppm 1 ppm

O

2

H2S Electrochemical 0 - 100 ppm 1 ppm

Electrochemical

0 - 1000 ppm

0 - 10,000 ppm

0 - 9.9%

10 - 100%

0 - 5%

5% - 100%

0 - 20.9%

21% - 25%

1 ppm
1 ppm

Instrument performance complies to the following standards:

• Flammable - BS EN / IEC 60079-29-1

• Flammable - CSA 22.2 No. 152 and ANSI/ISA-12.13.01

0.1%
1%

0.1%
1%

0.1%
1%

• Toxic - BS EN 45544

• Oxygen - BS EN 50104

GS700 will indicate if the gas sample is natural gas or Methane, providing:

• The measured sample is >30% LEL

• The sample source contains a minimum of 2% Ethane

All the values are typical at normal temperature and pressure. Humidity is between 0%

i

and 90% (non-condensing). Pressure changes at the inlet and exhaust are minimised as
they may cause transient changes in reading.

44

Instrument Specication

SPECIFICATION

Dimensions

Weight

Operating Temperature

Humidity

Construction

IP Rating

Display

Alarms

190 x 98 x 107 mm

1.4 kg (Alkaline), 1.3 kg (Rechargeable)

-20oC to 50oC (-4oF to 122oF)

0 - 90% RH non-condensing

Polycarbonate ABS with TPE over-moulding

IP55 (Protected from dust & water jets)

Monochrome LCD (240 x 160 pixels) with automatic bi-colour
backlighting

360o highly visible ashing LED
Sounder ~ 90 db at 0.3 m

Sampling System

Power Source

Approved Batteries

Battery Life

Warranty

Integral pump with ow fail sensor. Sample path is protected
by a hydrophobic and cotton lter.

Flow rate: ~ 0.5 l/min with no restriction.
Response times increase ~ 2 second per metre of tubing

used. Maximum tubing length 30 metres.

Alkaline Batteries: 3 x size ‘D’ (LR20), or
Rechargeable Battery Pack

Alkaline: Duracell - MN1300 or ID1300

Ansmann - Industrial or XPower

Panasonic - EVOLTA

Rechargeable: GMI rechargeable battery pack

20 hours (Alkaline & Rechargeable)

2 years (excluding consumables)

45

GS700 USER GUIDE

*500 session logs, each log can include:

• Date / time

• User ID

Datalogging

* Session log: the time from instrument switch on, until instrument switch off.

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• Modes of operation

• Gas readings / activated alarms

• Calibration / bump test data

• Barhole logs / GPS location data
Oldest log will be overwritten when full.

Alarm Set-points

It is the responsibility of the user to ensure that the alarm set-points are appropriate for the

!

safe operation and legal requirements of the country / industry in which the instrument is
being used.

Gas Hi HiHi Lo STEL LTEL

LEL - 20% - - -

CO - 300 ppm - 200 ppm 30 ppm

O2 - 23.0% 19.5% - -

H2S - 15 ppm - 10 ppm 5 ppm

The above table shows example alarm set-points. Alarm set-points are congured during

i

instrument procurement.

46

Soft-Key Button Glossary

The following table shows Soft-Key options that may be displayed.

Feature Description

Abort Abort testing

Ack Acknowledge alarm

A/V Audio / visual

B/H Barhole test

Clear Clear present readings

Func Shows additional functions

GPS Show GPS coordinates

Live Return to live gas readings

SPECIFICATION

Log Manual datalog

Mode Available operating modes

Next Go to next gas reading or alarm level

No Reject selection

Pump Toggle the instrument pump

Purge Purge gas from sensors

Quit Exit application

Range Changes the visible gas range

Retry Retry the soundness test

Start Begin an application

View View gas readings and alarm levels

Ye s Conrm selection

Zero Zero sensor

+ Increase reading

- Decrease reading



Shows additional functions

47

Thank you for reading this data sheet.

For pricing or for further information, please contact us at our UK Office, using the details

below.

UK Office

Keison Products,

P.O. Box 2124, Chelmsford, Essex, CM1 3UP, England.

Tel: [phone]
Fax: [phone]

Email: [e-mail]

Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the

suitability of this product.