Geotech G200 User manual

G200RANGE
G200 AND G210 OPERATING MANUAL

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Table of Contents
Manual Guidelines...................................................................................................................................5
Safety Related Information..................................................................................................................5
Hyperlinks............................................................................................................................................5
Notes ...................................................................................................................................................5
Introduction ............................................................................................................................................6
The G200 Analyser...............................................................................................................................6
The G210 Analyser...............................................................................................................................7
Instrument Components - Standard Product.......................................................................................8
G200 Range Optional Products and Accessories.....................................................................................9
Optional Products................................................................................................................................9
Analyser Data Manager (Optional) ......................................................................................................9
Event Log .............................................................................................................................................9
Carbon Monoxide Reading (Optional –Enhancement for G210 ONLY)...............................................9
Oxygen Reading (Optional –Enhancement for G210 ONLY) .............................................................10
Pressure Regulator (Optional - G210 ONLY) ......................................................................................10
Soda Lime CO2Filter ..........................................................................................................................10
Assembly and connection ..............................................................................................................11
Instrument Accessory Products .........................................................................................................12
Instrument Features..............................................................................................................................13
Physical Characteristics of the Instrument Panel...............................................................................13
Panel Key Functions...........................................................................................................................14
Instrument Connection Points...........................................................................................................15
General Operational Instructions ..........................................................................................................16
Switching the Instrument On.............................................................................................................16
Switching the Instrument Off.............................................................................................................16
Entering Data.....................................................................................................................................16
Numeric Data.................................................................................................................................16
Alpha-numeric Data .......................................................................................................................17
Instrument Status Icons.....................................................................................................................17
Changing Between Parameters..........................................................................................................18
Memory .............................................................................................................................................18
Storage...............................................................................................................................................18
Warning and Error Codes...................................................................................................................18

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Battery/Charging................................................................................................................................18
Instrument Main Read Screen ...........................................................................................................19
Soft-Keys ........................................................................................................................................19
Alternative Reading Methods ............................................................................................................19
Peak Reading..................................................................................................................................19
Store Reading.................................................................................................................................20
Hold Reading..................................................................................................................................20
Logged Reading:.............................................................................................................................20
Enter ID Codes ...................................................................................................................................20
Soft-Keys ........................................................................................................................................21
Main Menu ........................................................................................................................................21
Information ....................................................................................................................................22
Utilities...........................................................................................................................................22
Calibration......................................................................................................................................28
View Data.......................................................................................................................................28
Diagnostics.....................................................................................................................................30
Monitor (G200 ONLY).....................................................................................................................30
Taking Readings.....................................................................................................................................35
Preliminary Checks - Best Practice.....................................................................................................35
G200 Gas Measurement Process –Best Practice ..............................................................................36
G210 Gas Measurement Process –Best Practice ..............................................................................37
Calibration.............................................................................................................................................39
User Calibration .................................................................................................................................39
Calibration Gases ...............................................................................................................................39
Calibration Set-up ..............................................................................................................................39
Calibration Equipment.......................................................................................................................40
Calibration Method............................................................................................................................41
Zero Calibration..............................................................................................................................41
Span Channels................................................................................................................................42
Last Field Calibration..........................................................................................................................42
Calibration Record .............................................................................................................................42
Recommended Gases for Calibration ................................................................................................43
G200 Range Calibration –Best Practice.............................................................................................44
Problem Solving.....................................................................................................................................45

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Warnings and Errors ..........................................................................................................................45
Under and Over Range Codes ........................................................................................................45
Self-test Warning Messages...............................................................................................................46
User Calibration Trouble Shooting.....................................................................................................48
User Calibration Explained:............................................................................................................48
Cross-Gas Effects ...............................................................................................................................50
CO2Cell ..........................................................................................................................................50
O2Cell ............................................................................................................................................50
N2O Cell..........................................................................................................................................50
CO Cell............................................................................................................................................50
Hardware Reset .................................................................................................................................50
Service...................................................................................................................................................52
User Serviceable Parts .......................................................................................................................52
Cleaning .............................................................................................................................................52
Warranty Policy .....................................................................................................................................53
Event Log...............................................................................................................................................55
WEEE Compliance .................................................................................................................................56
EU Declaration of Conformity................................................................................................................57
Glossary of Terms..................................................................................................................................58

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MANUAL GUIDELINES
Safety Related Information
Information in this manual that may affect the safety of users and others will be in a box
identical to this one.
Failure to follow this information may result in physical injury which in some cases could be fatal.
Hyperlinks
Hyperlinks to other sections of this manual, websites or email addresses are in the following format:
www.geotechuk.com
Notes
Important/useful information and instructions are shown clearly throughout the manual in a note
format.
For example:
Note: For further information please contact Technical Support at QED on [phone] or
email [e-mail].

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INTRODUCTION
This manual explains how to use the instrument model types listed below:
G200 N20 0-1,000ppm (plus 10,000 range low resolution)
G210 N20 0-100%+CO2 0-2,000ppm+O2 0-100%+CO 0-500ppm
Both units have been developed to incorporate the latest technology and specification requirements,
which provide the user with a fast, simple-to-use and accurate piece of monitoring instrumentation.
Note: These instruments are sensitive pieces of scientific equipment, and should be treated as
such.
If the equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
The G200 Analyser
The G200 analyser is specifically designed to safety check background zone levels of N2O (0-
1,000ppm) in medical applications. This instrument measures the long term exposure to N2O gas
along with the TWA (time weighted average), leak detection for N2O storage. It is a dual purpose
background analyser or personal analyser and is highly portable.
The G200 analyser has the following features:
O2, N20 0-1,000ppm
Data storage for 1,000 readings and download
Inlet
Soda Lime
CO2Filter
Current
Value
TWA Value

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EH40 occupational exposure limits calculated (TWA) –applicable to the UK only
Leak detection
User settable alarms
Data download for graphing and reporting
Four modes of operation: personal safety - TWA 8 hour read back; room monitor –
background levels, user defined times; leak mode –1-10,000ppm fast response; and standard
measuring.
The G210 Analyser
The G210 analyser is specifically designed for highly accurate measurement and verification of the
quality of piped N2O and O2gases in hospitals. This instrument enables up to four gases to be
measured, easy user calibration, quick verification of gas quality, user maintained site and sample
point IDs for monitoring as well as identification of contaminants CO and CO2.
The analyser has the following features:
N2O 0-100%
O2 0-100% (optional)
CO 0-500ppm (optional)
CO2 0-2,000ppm
Data storage with site and ID input
Data download for graphing and reporting

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Instrument Components - Standard Product
Reference:
A)
Analyser
B)
Mains Battery Charger
C)
Mains Battery Charger Adaptors:
Europe
US
Australia
D)
Soda Lime CO2Filter (G200 Only)
E)
Operating Manual

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G200 RANGE OPTIONAL PRODUCTS AND ACCESSORIES
Optional Products
The G200 analyser range has a number of optional products for purchase which enhance the usability
and enable further analysis of data and reading information.
Note: For more information on the features listed in this section please contact Sales at QED on
[phone] or email sale[email protected].
Analyser Data Manager (Optional)
Analyser Data Manager software application enables the operator to maximise the operation of the
analyser by providing the ability to:
Obtain instrument status.
View the instrument readings and event log data.
Download and store readings for further analysis.
Graph downloaded instrument readings.
View, import and export the instrument configuration.
Update the instrument’s firmware.
Copy data from the G200 Client into other packages such as MS Excel.
Email data directly from the application.
Configure remote access to a central database.
Print graph and tabular data.
Event Log
The G200 range of instruments incorporates the facility to log significant events via the ‘Event Log’.
This can be used as an aid to monitoring the use of the instrument. It can also be used as a diagnostic
tool if there is a problem with the instrument.
The event log can only be viewed via the optional Analyser Data Manager software. It cannot be
viewed on the analyser screen. Applicable events are stored in the event log automatically. No user
intervention is required.
The event log can hold approximately 270 events. If the log becomes full then it begins to overwrite
the older events. This can be identified by the index field which starts from event number 1. The log
is cleared when the instrument is reset.
Note: Please refer to section Event Log of this operating manual for further information.
Carbon Monoxide Reading (Optional –Enhancement for G210 ONLY)
The G210 instrument has the optional facility to use an internal CO cell (specified at the time of
manufacture or upon request at service interval). This allows the instrument to read and display
carbon monoxide readings along with N2O.

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Oxygen Reading (Optional –Enhancement for G210 ONLY)
The G210 instrument has the optional facility to use an internal oxygen cell (specified at the time of
manufacture or upon request at service interval). This allows the instrument to read and display
oxygen readings along with N2O, CO2, CO.
Pressure Regulator (Optional - G210 ONLY)
A pressure regulator must be used when taking gas readings to restrict the flow into the instrument
when using the G210 analyser. When sampling piped medical gases the pressure of the gas needs to
be reduced before it is passed to the instrument. This reduces the pressure to 100mbar suitable for
the instrument.
Note: Alternative methods of pressure reduction are available and could be used. However, to
avoid irreversible damage to the instrument, please seek guidance from the supplier /
manufacturer before using any other pressure device.
Do NOT use the instrument at full piped pressure (maximum pressure 300mbar).
Soda Lime CO2Filter
The G200 instrument must only be used with a soda lime CO2 filter attached. The filter removes CO2if
present when a reading is taken.
This filter should always be fitted when using a G200 instrument as any CO2will cross-contaminate
the N2O reading. For further information please refer to section Cross-Gas Effects.
The life of the filter will vary depending on usage. The crystals change colour from pale green-blue to
white-grey. The filter element should be discarded when a significant percentage of the crystals start
to turn a white-grey colour see below:-
Figure 1 - New filter (pale green/blue)
Figure 2 - Used filter (white/grey)

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Assembly and connection
The filters are supplied in a sealed storage bag to improve their shelf life. The parts supplied should be
assembled as per the diagram shown.
Note: A soda lime CO2filter can also be used to zero other G Range instruments.
Soda Lime Filter
Tubing
PTFE Filter

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Instrument Accessory Products
Optional accessory and replacement parts may be purchased for the G200 range from QED direct.
Please refer to the website www.qedenv.co.uk for further details on pricing and how to order.
Ref
Description
Part Number
A
USB Lead
USBLEAD2
B
Spare Sample Filters (pack of 5)
068296/S
C
Sample Tube Kit
G1.6
D
Hard Carry Case
050227
E
Spare Calibration Gas (Various gas options available)
CDA7.6
F
Mains Charger including Worldwide Adaptors
073024
G
Soft Carry Case
G1.11
H
Soda Lime Filter Kit
G1.10
I
Analyser Data Manager Software
G1.4
K
Regulator and Tubing for Calibration Gas
G1.1

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INSTRUMENT FEATURES
Physical Characteristics of the Instrument Panel
Front View:
Reference:
A) Main Read Screen
B) Soft keys
C) On/Off key
D) Pump key
E) Key 4 –scroll left
F) Key 8 –scroll down
G) Menu key
H) Enter key
I) Key 2 –scroll up
J) Key 6 –scroll right
Back View:
Reference:
L) Serial number
M) Instrument stand
A
B
C
D
E
F
G
H
I
J

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Panel Key Functions
Key
Description
Function
A
Main Read Screen
Start and end screen when using the instrument.
B
Soft Keys
The function of the three ‘soft-keys’ on the front of the
instrument panel are determined by menu options
taken. Functions vary from screen to screen.
C
On/Off Key
Press the ‘On/Off’ key briefly to switch the instrument
on and off.
D
Pump Key
Press the ‘Pump’ key to start or stop the pump.
E
Scroll Left Key
Also ‘Key 4’. Enables the operator to scroll left to
display more information.
F
Scroll Down Key
Also ‘Key 8’. Enables the operator to scroll down to
display more information.
G
Menu Key
Press the ‘Menu’ key to go to the ‘Main’ menu. Enables
the operator to pre-set values and settings. Select
options from the ‘Main’ menu to also view data and
readings stored or held.
H
Enter Key
The ‘Enter’ key accepts/confirms choices made by the
operator to various functions and operations. Also,
required to confirm numeric data entry.
I
Scroll Up Key
Also ‘Key 2’. Press scroll up to view further information
on the instrument read screen.
J
Scroll Right Key
Also ‘Key 6’. Press scroll right to view further
information on the instrument read screen.
L
Serial Number
Unique Identification for the instrument. Verification of
the serial number will be required if Technical Support
assistance is needed.
M
Instrument Stand
Instrument stand.

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Instrument Connection Points
Top View:
Side View:
Key
Description
Function
A
Gas Inlet
Gas inlet point used to attach the sample tube and filter
in order to take the gas reading
B
Gas Outlet
Gas outlet port used to exhaust the gas
C
USB Port
Used to connect the analyser to a PC via a USB cable to
download data
D
Charger Port
Used to attach the main charger to the analyser for
charging
5V ±0.5V(max 1000mA)
+- 5V ±0.5V(max 1000mA) +- +-

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GENERAL OPERATIONAL INSTRUCTIONS
Note: Fully charge the unit before use when the instrument is first received or if the instrument
has been in storage for six months or more.
Switching the Instrument On
To switch on the instrument, press the ‘On/Off’ key briefly. There will be a short beep and a
slight pause followed by the Geotech logo.
The power on self-test will commence.
Assuming there are no warnings to display the instrument will continue to the ‘Main Read
Screen’.
Switching the Instrument Off
Purge with fresh air. Run the pump for approximately 30 seconds or until the readings have
returned to normal levels.
Note: Before the instrument is switched off a clean air purge should be performed. This ensures
that the instrument is free from gas and ready for the next measurement. This final purge is
especially important for the oxygen sensor as it may degrade if stored when contaminated with
gas.
To switch off the instrument, press the ‘On/Off’ key briefly.
Note: If the ‘Auto Off’ utilities setting is set to ‘Yes’, the analyser will switch off automatically
after ten minutes if not in use.
Entering Data
During normal operation the user may be prompted to enter data or information via the keypad, i.e.
entering an ID code or setting an alarm level.
When entering data into the instrument all fields are fixed format and are populated from the right.
Numeric Data
To enter a new time 09:25:00 the user would type in 092500 using the numeric keypad in the
following sequence:-
* __:__:_0
* __:__:09
* __:_0:92
* __:09:25
* _0:92:50
* 09:25:00
Press the ‘Enter’ key to confirm/accept data keyed.

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Any mistakes can be corrected using the soft-key ‘Delete’ which will delete the last digit typed.
Alternatively, the sequence can be retyped before the ‘Enter’ key is pressed and the existing numbers
will be pushed off the screen.
Alpha-numeric Data
When entering site IDs, alpha-numeric codes may be specified. To enter characters select either ‘1-
Site’ or ‘2-ID’ followed by the ‘Menu’ key and the following screen is displayed:
Screen 1 –Enter site
The operator can choose upper and lowercase characters. Press the ‘Menu’ key again to choose
lowercase characters. Use the numeric keypad on the instrument to select the appropriate letter, i.e.
to select A ‘Key 2’, to select B ‘Key 2’ twice (just like on a mobile phone).
Note: The instrument will not allow invalid data to be entered; this should be deleted and re-
entered.
Instrument Status Icons
The following icons may be displayed on the instrument read screens:
Icon
Description
Battery charge state
(flashing)
< 1 hour remaining
(flashing)
Battery charging
Charged
Pump running
(flashing)
Pump stalled (Backlight turns red)
Alarm set
(flashing)
Alarm active (Backlight turns red)
USB connected to PC (flickers when transferring data)
Logging mode active (flashes when memory nearly full)
Temperature probe(s) connected
Humidity probe connected
(flashing)
Service due (every 12 months)
Service overdue
Fault/repair
Waiting
Note: A red backlight is displayed if the pump is stalled or the alarm is activated. For further

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information, please refer to section Alarms or Flow Fail.
Changing Between Parameters
By default, the instrument displays the ‘Main Read Screen’ (for gas measurement). The instrument
will return to this screen after power on or when returning from the menus. The ‘Scroll’ keys can be
used to switch to another measurement screen. Continue to press the ‘Scroll’ keys to return to the
‘Main Read Screen’.
Memory
The memory should not be used as a permanent storage medium and any important data should be
transferred to a more permanent storage medium as soon as possible. The instrument should not be
stored for prolonged periods with valuable data in its memory.
Storage
When not in use the instrument should be kept in a clean, dry and warm environment, such as an
office. It should be stored flat with the stand folded away which helps prolong the life of the O2cell.
Warning and Error Codes
When switched on the instrument will perform a predetermined self-test sequence taking
approximately ten seconds. During this time many of the instrument’s working parameters and
settings are checked. If any operational parameters are out of specification or if the pre-programmed
recommended calibration/service date has passed, errors or warnings may be displayed.
Note: For further information please refer to section Problem Solving.
Battery/Charging
Note: Fully charge the unit before use when the instrument is first received or if the instrument has
been in storage for six months or more.
The battery used in the instrument is a 2.6 Ah Lithium-Ion cell. The instrument must be charged using
the power supply supplied with your instrument. The power supply supplied is intended for indoor
use only. Please ensure adequate ventilation whilst charging.
Note: The instrument cannot be powered or charged via the USB connector.
Note: When plugged into the power supply the instrument will power on and display charging.
When complete the display will change to show that the instrument is charged. To switch the
instrument ON whilst charging or charged is displayed, the operator will need to press and hold the
power key briefly.
Note: Once the instrument is fully charged, the power supply should be disconnected from the
instrument.

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Instrument: Input: 5Vdc ± 0.5V (max 1000mA)
Power Supply: Input: 100 -240Vac 60/50Hz 120mA
Output: 5Vdc 1000mA (5VA)
Note: A full charge will take approximately 4 hours. Typically, a fully charged battery will last 10-
12 hours.
When the instrument is already powered on, the operation is slightly different as the battery icon
changes to a flashing plug symbol. This will stop flashing when the charge is complete.
Instrument Main Read Screen
After the analyser has been switched on and the warm-up self-tests completed the analyser will
display the following screen.
Screen 2 - Main readings
Soft-Keys
Peak - Enables the operator to display the peak reading.
Store - Enables the operator to store the reading for viewing/download later.
Hold - Enables the operator to hold the current reading being taken.
Alternative Reading Methods
The G210 has three reading types or methods which each require slightly different operating
procedures:
Peak reading
Store reading
Hold reading
Logged reading
Peak Reading
The operator can toggle the reading mode between normal (current) and peak readings. Whilst in
peak reading mode the instrument will only display peak values for each of the channels. These
values can then be stored by pressing the ‘Store’ key or automatically at the appropriate logging

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interval (if logging is enabled).
The peak value is reset after a reading is stored or by exiting the peak mode using the appropriate
soft-key. The current mode of operation can be identified by the status of the soft-key, either
‘Normal’ or ‘Inverse’, where inverse indicates peak mode is active.
Store Reading
The ‘Store’ reading option allows the operator to store the current reading. Upon selecting this
option the operator is then prompted to enter or select a ‘Site ID’ and ‘Sample Point ID’ to identify the
reading. Select the ‘Accept’ button to confirm the ID choices. For further information please refer to
section Enter ID Codes.
Hold Reading
The ‘Hold’ reading option allows the operator to freeze the currently displayed reading. This allows it
to be manually recorded or moved away from the sample point. Once activated, press the soft-key
‘Hold’ and the readings are fixed until the ‘Hold’ key is pressed again or the reading is stored.
The current mode of operation can be identified by the status of the soft-key which is inversed whilst
in the hold phase.
Screen 3 - Hold reading
Logged Reading:
Logged readings need to be configured and initiated via the ‘Utilities’ menu by pressing ‘Key 6 -
Logging’. During configuration the user will be asked to supply an ID, reading interval and pump run-
time.
These parameters are used to control the reading frequency in logging mode. Once logging mode is
activated the instrument will automatically record a reading at every interval until stopped by the
operator or the memory becomes full. Logging is also suspended temporarily whilst the user is
accessing the menu options.
Whilst the logging mode is active both the ‘Pump’ and ‘Store’ key will be deactivated; only logged
readings can be stored.
Enter ID Codes
ID codes are either created at the time of selection on the analyser or created using the Analyser Data
Manager software and uploaded to the instrument for selection prior to readings being taken.
The ‘Site’ (top level ID) and ‘ID’ (second level ID) fields refer to the identifier that the operator gives to
a reading set before it is stored. The G200 and G210 allows the operator to enter up to 16 alpha-
numeric characters which are split into two parts (to help manage the data) called ‘Site’ and ‘ID’ by