GMI GDUnet Instruction Manual

User Handbook
Gas Measurement Instruments Ltd

Issue 4
05/10/2016
Part Number: 14765
GMI welcomes comments on all our publications.
Your comments can be of great value in helping us to improve
our customer publications. Please send any comments that you
have to [email protected]
Copyright © Gas Measurement Instruments Ltd 2013

LICENCE
i
LICENCE AGREEMENT
This Licence Agreement is your proof of licence. Please treat it as
valuable property. Please note that this licence agreement supersedes
the “statement of Copyright Restrictions”.
IMPORTANT - READ CAREFULLY
This is a legal and binding contract between you (either an individual
or an entity), the end user and Gas Measurement Instruments Limited
(GMI). By opening sealed software packages or by installing, copying, or
otherwise using the ‘exiCal net’ or ‘IMS Results Manager’ programs
(“SOFTWARE”), you agree to be bound by the terms of this agreement.
If you do not agree to the terms of this agreement you should promptly
return the software packages and accompanying items* (including
written materials, binders and containers) to GMI.
‘exiCal net’ & ‘IMS Results Manager’ -
SOFTWARE LICENCE
1. GRANT OF LICENCE: The ‘exiCal net’and ‘IMS Results Manager’
Licence Agreement (Licence) permits concurrent use of the SOFTWARE
on the number of computers for which this licence grants (that is: single
user package licences one user; twenty user licence licences twenty
users). Additional SOFTWARE licences may be purchased for each
additional concurrent user.
If you have acquired this SOFTWARE in a multiple licence pack, you may
make the number of additional copies of the SOFTWARE authorised on
the printed copy of the licence. You may also store or install a copy of
the network SOFTWARE on a storage device, such as a network server,
used only to install or run the SOFTWARE on your other computers over
an internal network; however you must acquire and dedicate a licence
for each separate computer on which the SOFTWARE is installed or run
from the storage device. A licence for the software may not be shared
or used concurrently on different computers.
This licence is granted for use on the GMI products and for use on one
computer. If you require a second copy you must purchase that from

USER HANDBOOK
ii
GMI or its distributor. The documentation accompanying this software
is essential for the correct and safe operation of the instruments.
This software is used on certied equipment which may be used in life
critical applications. Only trained competent personnel should use this
equipment and should be aware of the certication, calibration and
Health and Safety issues associated with the product and its application.
2. COPYRIGHT: The SOFTWARE is owned by GMI and is protected
by United Kingdom copyright laws and international treaty provisions
therefore, you must treat the SOFTWARE like any other copyrighted
material (for example, a book or musical recording) except that you
may either (a) make one copy of the SOFTWARE solely for backup or
archival purposes, or (b) transfer the SOFTWARE to a single hard disk
provided you keep the original solely for backup and archival purposes.
You may not copy the written materials accompanying the SOFTWARE.
3. OTHER RESTRICTIONS: You may not rent or lease the SOFTWARE,
but you may transfer the SOFTWARE and accompanying written
materials on a permanent basis to another individual. If you transfer
the software, you must retain no copies and the recipient must agree
to the terms of this agreement. You must not reverse engineer,
decompile, or disassemble the SOFTWARE that is provided solely as
executable programs (.EXE les) or dynamic link libraries (.DLL les).
If the SOFTWARE is an update, any transfer must include the update
and all prior versions.
30 DAY LIMITED WARRANTY
If the product was purchased in the UK , simply return the full product in
resellable condition* within 60 days of purchase to GMI, together with
your original receipt or invoice, for a full refund. If this product was not
purchased in the UK, you should return the full product* to the place of
purchase within 30 days of purchase for a full refund.
LIMITED WARRANTY
The CD and User Handbook that make up this software product are
warranted by GMI to be free from defects in materials and workmanship
for a period of 60 (sixty) days from the date you purchased this product.
If you notify GMI within the warranty period of such defects in materials
or workmanship, GMI will replace the defective CD or handbook.
The sole remedy for breach of this warranty is limited to replacement
of defective CD or handbook and/or refund of purchase price and does
not include any other kinds of damage.

LICENCE
iii
Apart from the foregoing limited warranty, the software programs are
provided “AS IS”, without warranty of any kind, either expressed or
implied. The entire risk as to the performance of the program is with
the purchaser. GMI does not warrant that the operation of the programs
will be uninterrupted or error free. GMI assumes no responsibility or
liability of any kind for errors in the program or documentation or for the
consequences of any such errors.
INCIDENTAL AND CONSEQUENTIAL DAMAGES CAUSED BY
MALFUNCTION, DEFAULT, OR OTHERWISE WITH RESPECT TO
BREACH OF THIS WARRANTY OR ANY OTHER EXPRESS OR
IMPLIED WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE, ARE NOT THE
RESPONSIBILITY OF GMI AND ARE HEREBY EXCLUDED BOTH
FOR PROPERTY AND, TO THE EXTENT NOT UNCONSCIONABLE,
FOR PERSONAL INJURY DAMAGE.
The remedies described above are the exclusive remedies extended
to you by GMI for any default, malfunction or failure of the product to
conform with this warranty or otherwise for the breach of this warranty
or any other warranty, whether expressed or implied.
* If the product is not in resellable condition, you will be charged a 20%
restocking fee.
Should you have any questions concerning this agreement please
contact the GMI sales department on [phone].

USER HANDBOOK
iv

COPYRIGHT
v
COPYRIGHT
This User Handbook is copyright of Gas Measurement Instruments Ltd
(GMI) and the information contained within is for use only with the GMI
Gas Delivery Unit (GDUnet). Reproduction, in whole or in part, including
utilisation in machines capable of reproduction or retrieval without written
permission of GMI is prohibited. Reverse engineering is not permitted.
LIABILITY
Every care has been taken in the preparation of this handbook, however,
GMI do not accept any responsibility for errors or omissions and their
consequences. Information in this handbook is subject to change without
notice. This handbook does not constitute a specication or basis for a
contract. Your statutory rights under law are not affected.
MODIFICATION NOTICES
GMI aim to notify customers of relevant changes in the product operation
and maintain this handbook up to date. In view of the policy of continuous
product improvement there may be operational differences between the
latest product and this handbook.
This handbook is an important part of the GDUnet product.
Please note the following points:
• It should be kept with the GDUnet for the life of the product.
• Amendments should be attached to this handbook.
• Thishandbookshouldbe passedontoany subsequentowner/userof
the product.
• Althougheverycareistakeninthepreparationofthishandbook,it does
not constitute a specication for the product.
DISPOSAL ADVICE
When no longer in use, dispose of the GDUnet carefully and with respect
for the environment. Refer to WEEE directive statement, such as:
In compliance with the WEEE directive, GMI will dispose of the GDUnet
without charge if the GDUnet is returned to GMI.

USER HANDBOOK
vi
SAFETY PROCEDURES
The instruments which are used on the GDUnet can be used to protect
life and property and certain elements may be used in potentially
explosive, toxic, and oxygen decient atmospheres.
• Never attempt to calibrate, adjust or repair the product unless
you are fully trained, aware of all potential hazards and have
been assessed by an authorised body as to your competence.
Unauthorised adjustment of the product may endanger yourself
and others.
• Gases are dangerous. Care should always be taken when
monitoring or handling gases. All personnel should be trained
and competent in their use.
• Some gases need special handling or delivery techniques since
inappropriate use of material or techniques may inuence the
calibration result. Please contact GMI Customer Support if you
have any queries.
Any right of claim relating to product liability or consequential damage
to any third party against GMI is removed if the above warnings are
not observed.
MAINTENANCE, SERVICING & CALIBRATION
Maintenance of the GDUnet should only be undertaken by trained
competent personnel who have been authorised by the certicate holder
or other licensed body who has passed on the relevant certication data.
Failure to ensure this and the use of unauthorised parts or repairers
may invalidate the approvals.
• Only GMI replacement parts should be used.
• All instruments and associated equipment should be regularly
serviced and calibrated.
• Only certied traceable gases should be used in the maintenance
/ calibration of the GDUnet.
• Only calibrate the product in the gases it will be used for to ensure
compliance with the specication. GMI does not recommend the
use of correction factors for calibration or hazard monitoring.

CONTENTS
vii
TABLE OF CONTENTS
LICENCE AGREEMENT .......................................... i
IMPORTANT - READ CAREFULLY......................................i
‘exiCal net’ & ‘IMS Results Manager’ - SOFTWARE
LICENCE..............................................................................I
30 DAY LIMITED WARRANTY............................................ii
LIMITED WARRANTY.........................................................ii
COPYRIGHT ........................................................... v
LIABILITY ............................................................................v
MODIFICATION NOTICES..................................................v
DISPOSAL ADVICE ............................................................v
SAFETY PROCEDURES ...................................................vi
MAINTENANCE, SERVICING & CALIBRATION ...............vi
INTRODUCTION..................................................1-1
1.1 BASIC CONCEPTS.................................................. 1-1
1.2 CALIBRATION GASES ............................................ 1-3
1.2.1 Recommended Types ................................................ 1-3
1.2.2 Traceability ................................................................. 1-3
1.2.3 Limits of Preparation .................................................. 1-4
1.2.4 Analysis ...................................................................... 1-4
1.2.5 Preferred Values ........................................................ 1-4

USER HANDBOOK
viii
1.3 CALIBRATION LIMITS ............................................. 1-5
1.3.1 Gas Limits .................................................................. 1-5
1.3.2 Standards................................................................... 1-5
1.4 exiCal net................................................................ 1-6
1.5 IMS RESULTS MANAGER ..................................... 1-6
exiCal net INSTALLATION..................................2-1
2.1 SYSTEM REQUIREMENTS..................................... 2-1
2.2 INSTALLATION ........................................................ 2-1
exiCal net OPERATION......................................3-1
3.1 NAVIGATION............................................................ 3-2
3.2 INITIAL SETUP ........................................................ 3-3
3.2.1 Select IMS.................................................................. 3-3
3.2.2 Server Name .............................................................. 3-6
3.2.3 Database Connection................................................. 3-7
3.3 CALIBRATE.............................................................. 3-8
3.3.1 Calibration Setup Options .......................................... 3-8
3.3.2 Calibration Setup Editor ............................................. 3-9
3.3.3 Edit Calibration Option ..............................................3-11
3.3.4 Edit Setup / New Template....................................... 3-13
3.3.5 Delete Setup / Template........................................... 3-15
3.3.6 Advanced Editor ....................................................... 3-15
3.3.7 GDUnet Selection .................................................... 3-16
3.3.8 Test or Calibrate Selection ....................................... 3-16
3.3.9 Test / Calibrate Instrument ....................................... 3-17
3.4 ADVANCED EDITOR ............................................. 3-19
3.4.1 Edit Gases................................................................ 3-21
3.4.2 Edit Gas Limit(s)....................................................... 3-22

CONTENTS
ix
3.4.3 Edit 100% LEL Conversion Factors ......................... 3-23
3.4.4 Edit Purge Time........................................................ 3-24
3.5 ADDITIONAL FILE MENU ITEMS .......................... 3-25
3.5.1 File Menu ................................................................. 3-25
3.5.2 Edit Menu ................................................................. 3-26
3.5.3 Help Menu................................................................ 3-26
3.5.4 GDU Status Check................................................... 3-27
3.6 PREFERENCE SETTINGS.................................... 3-29
3.6.1 ‘General’ Tab ............................................................ 3-31
3.6.1.1 Cal Due (Gasurveyor 500 series only) ....................... 3-31
3.6.1.2 Stop On Zero Failure................................................... 3-31
3.6.1.3 Stop On First Span Failure.......................................... 3-31
3.6.1.4 Purge Time.................................................................. 3-32
3.6.1.5 Leak Checking ............................................................ 3-32
3.6.1.6 Default Conversion Factors......................................... 3-32
3.6.1.7 Password..................................................................... 3-32
3.6.1.8 Reset Settings ............................................................. 3-34
3.6.1.9 Select IMS ................................................................... 3-34
3.6.1.10 Add GDU ................................................................... 3-38
3.6.1.11 Edit GDU ................................................................... 3-39
3.6.2 ‘Ranges’ Tab............................................................. 3-41
3.6.2.1 Reset All Range Defaults ............................................ 3-41
3.6.2.2 Zero Air Limit ............................................................... 3-42
3.6.2.3 Gas Limit ..................................................................... 3-42
3.6.2.4 Gas Application Accuracy............................................ 3-42
3.6.2.5 Gas Application Time................................................... 3-42

USER HANDBOOK
x
IMS RESULTS MANAGER...................................4-1
4.1 INTRODUCTION...................................................... 4-1
4.2 SYSTEM REQUIREMENTS..................................... 4-1
4.3 INSTALLATION ........................................................ 4-2
4.4 SETUP ..................................................................... 4-7
4.4.1 Server Name .............................................................. 4-8
4.4.2 Database Connection............................................... 4-10
4.5 TEST RESULT STORAGE ......................................4-11
4.5.1 Results Download .....................................................4-11
4.5.2 Results Processing ................................................. 4-12
4.5.3 GDU List .................................................................. 4-13
GDUnet OPERATION...........................................5-1
5.1 GDUnet Models........................................................ 5-1
5.2 MAIN FEATURES..................................................... 5-2
5.2.1 LCD ............................................................................ 5-3
5.2.2 Test LEDs .................................................................. 5-3
5.2.3 External Connectors................................................... 5-4
5.2.4 Gas Connections........................................................ 5-4
5.2.5 Gas Nozzle................................................................. 5-5
5.2.6 Microswitches............................................................. 5-6
5.2.7 Optical Port ................................................................ 5-7
5.2.8 IrDA Window .............................................................. 5-8
5.2.9 Front Panel Lock ........................................................ 5-8
5.2.10 Keypad ...................................................................... 5-9
5.3 STANDARD OPERATION ...................................... 5-10
5.3.1 Test / Calibration Procedure......................................5-11

CONTENTS
xi
TEST / CALIBRATION SETUP OF GMI PORTABLE
INSTRUMENT .....................................................6-1
6.1 CALIBRATE GASURVEYOR 526 INSTRUMENT.... 6-1
6.1.1 Start Software ............................................................ 6-1
6.1.2 Create New Setup Template ...................................... 6-3
6.1.3 Send Calibration File.................................................. 6-9
STANDALONE MODE .........................................7-1
7.1 SEND TEST / CALIBRATION SETUP FILES TO USB ..
7-1
7.2 UPLOAD TEST / CALIBRATION SETUP FILES TO
GDUnet ........................................................................... 7-4
7.3 DOWNLOAD TEST RESULTS................................. 7-5
7.4 VIEW / PRINT TEST RESULTS ............................... 7-5
7.4.1 Certicate Generation ................................................ 7-6
7.4.2 Certicate Files ........................................................ 7-10
INDEX....................................................................xiii

USER HANDBOOK
xii

INTRODUCTION
1-1
INTRODUCTION
1.1 BASIC CONCEPTS
The Gas Delivery Unit (GDUnet) can be used in three different
applications:
• As a gas delivery unit in an Instrument Management
System (IMS) - see paragraph (a).
• As a gas delivery unit in a workshop system - see
paragraph (b).
• As a gas delivery unit in standalone mode - see paragraph
(c).
Fig. 1-1 Gas Delivery Unit (GDUnet)
1

USER HANDBOOK
1-2
The GDUnet, as illustrated in Fig. 1-1, is used to automatically
deliver gas to Gascoseeker / Gasurveyor / First Responder /
Leak Surveyor / Oxygas / Shipsurveyor instruments, via one of
the applications detailed below:
(a) The GDUnet as a gas delivery unit in an Instrument
Management System (IMS).
The GDUnet is used by instrument operators to automatically
test or calibrate instruments on a regular basis, e.g. every
two weeks.
 Test and calibration les are sent to the GDUnet by a
networked PC or laptop running exiCal net software.
Test and calibration results stored on the GDUnet are
retrieved from the GDUnet, and sent to an IMS database,
by a networked PC or laptop running IMS Results Manager
software.
Network communication is made via Ethernet. Multiple
GDUnet’s can be connected to the network at any time.
The GDUnet can be defined as ‘operating-system
independent’-oncethetestlesarereceivedtheGDUnet
operates as a standalone system.
The setup consists of a GDUnet, a networked PC, gases,
exiCal net software and IMS Results Manager software.
The objective of using a GDUnet, is to ensure that the
instrument is tested on a regular basis, to check and correct
calibration, ensuring instrument compliance and to maintain
records of the instrument performance.
(b) The GDUnet as a gas delivery unit in a workshop system.
A workshop system is used by an instrument technician to
service, repair and calibrate / test instruments annually, or
more frequently if required.
The workshop system consists of a GDUnet, a PC, gases
and exiCal Plus software. Communication is made via
USB.

INTRODUCTION
1-3
(c) The GDUnet as a gas delivery unit in standalone mode.
 TestandcalibrationlesaretransferredfromaPC/Laptop
running exiCal net software, to the GDUnet via a USB
memory stick.
Test and calibration results stored on the GDUnet are
retrieved from the GDUnet using a USB memory stick.
The setup consists of a GDUnet, gases and exiCal net
software.
Note: For standalone operation refer to Chapter 7. A
large amount of the information contained in this
handbook is irrelevant when using standalone mode.
1.2 CALIBRATION GASES
The GDUnet is connected to cylinders of calibration gas to ensure
that a consistent standard can be maintained against which the
instrument can be checked.
The GDUnet can connect up to 8 gas cylinders (a 4 gas cylinder
version is also available).
1.2.1 Recommended Types
The instrument should be calibrated in the gas it will be used in,
rather than using calibration factors, i.e. Propane instruments
should be calibrated with Propane gas etc.
Gases should be full scale or mid range of scale rather then
lower end; i.e. calibrate 100% LEL range at 50% LEL rather
than 10% LEL.
Heavier hydrocarbon gases may take longer to clear the system
than lighter ones like Methane, and should be carefully organised
in terms of location on the manifold position and test sequence.
1.2.2 Traceability
Gases should be analysed and traceable to National Standard.
TheTestCerticateshouldhavethetotalgasanalysisincluding
air components.

USER HANDBOOK
1-4
1.2.3 Limits of Preparation
The limits of preparation of the gas should be clear, e.g. ±2%.
These limits should be better than the accuracy required from
the instrument.
The accuracy of preparation of the gas mixtures together with
the analysis accuracy should be clearly marked on the cylinder.
1.2.4 Analysis
The cylinder analysis should be known and within the operating
requirementsasspeciedbytheoperatingorganisation.
• Individual cylinders should be analysed.
• Limits on analysis should be clear.
• Method of analysis should be known.
1.2.5 Preferred Values
The typical values that would be used for instruments are given
below. The list is not exhaustive but can be used as a general
guide.
FOR ALL INSTRUMENTS ZERO RANGE - Control Air
Methane Instruments with 10% LEL Range - 0.5% CH4
Methane Instruments with 100% LEL Range - 2.5% CH4
Methane Instruments with %GAS Range - 100% CH4
Methane Instruments with ppm Range - 800ppm CH4
Methane Instruments with CO Range - 500ppm CO
Methane Instruments with H2S Range - 50ppm H2S
Note: This list is for guidance only and does not cover all the
ranges or gases that GMI instruments will cover.

INTRODUCTION
1-5
1.2.6 Specication
For detailed specifications on test limits and gases users
should consult instrument manuals, service bulletins, operating
proceduresandspecicationstoensurethatthespecications
and limits suit their need and are in line with their Company
procedures.
The manufacturer or his agent should be consulted for up to date
instrument information.
1.3 CALIBRATION LIMITS
1.3.1 Gas Limits
Gas limits for calibration or test are at the discretion of the
customer and are set up via exiCal net. Limits should be
based on the application but must always make allowance for the
instrumentspecicationandfortheaccuracyofthecalibration
gas.
Limits for various types of gases may change calibration test
parameters.
e.g.
Butane requires wider limits than Methane because of increased
gain requirements, thus the same limit cannot be applied to
different calibrations.
1.3.2 Standards
Reference should be made to the manufacturer’s standards
for the instrument and equipment as well as end users’ own
standards. These should all be compatible.

USER HANDBOOK
1-6
1.4 exiCal net
exiCal net is GMI’s WindowsTM based software package that
willallowcustomerstoeasilysetuptestandcalibrationlesto
be sent to the GDUnet for testing and calibrating instruments.
The GDUnet comes pre-loaded with the following exiCal net
testandcalibrationlesetup:
• Gas 1 - Air
• Gas 2 - 800 PPM Methane
• Gas 3 - 50% LEL Methane
• Gas 4 - 100% Volume Methane
The exiCal net software congures the GDUnet to test or
calibrate instruments automatically. This allows the user to specify
how instruments will be tested or calibrated and includes gases,
concentrations and pass or fail criteria.
exiCal net is also used to register additional GDUnet’s to the
network.
The installation of the software is detailed in Chapter 2.
The operation of the software is detailed in Chapter 3.
1.5 IMS RESULTS MANAGER
All test and calibration results are stored on the GDUnet.
IMS Results Manager is a software package that retrieves the
test and calibration results, from the GDUnet, and downloads
them to an IMS database.
After setup this application runs in the background on the
networked PC or laptop.
The installation and setup of the software is detailed in Chapter 4.