Uson
Q200 User Manual
Revison 10
Updated September 2018
Q200 User Manual Preliminary
196045/Issue 10
i
Disclaimer
D-Industrial Technology Ltd. makes no representations or warranties with respect to the
contents or use of this manual and specifically disclaims any express or implied warranties of
merchantability or fitness for any particular purpose. Further D-Industrial Technology Ltd
reserves the right to revise this manual and to make changes to its content, at any time, without
obligation to notify any person or entity of such revisions or changes.
Copyright
No part of this manual may be reproduced or transmitted in any form or by any means,
electronic or mechanical, including photocopying and recording, for any purpose other than the
purchaser's personal use without the written consent of the copyright holder.
©D-Industrial Technology Ltd, October 2003-2016. All rights reserved.
Trademarks
Q200 ® is a registered trademark of D-Industrial Technology Ltd
SPC-PC IVTM is a registered trademark of Quality America, Inc.
WindowsTM is a trademark of Microsoft Corporation.
Sales and Support
US and North America
Creative Solutions
PO Box 14511
Scottsdale, AZ 85267
+1 512 588-2002
chip@chipalbright.com
Q200 User Manual Preliminary
200120/Revision 10
i
Document History
Part Number: 200120
Revision History:
Issue Change
Note
Date Description
1 N/A 04/02/1994 First Edition
2 N/A 12/03/1994 First Revision
3 N/A 14/12/1994 Second Revision
4 1348 06/01/1995 Spares Updated
5 1415 25/01/1996 EC Revision
6 0051 02/07/1997 Sinter References
7 0263 08/11/1999 H, M & L Sinters. Fixed exponent display
8 0536 05/02/2002 Sales support information and document format
updated.
9 0627 1/10/2003 Sales support information updated
10
0760 2/26/2007 Added ROHS declaration
Preliminary Q200 User Manual
ii
200120/Revision 10
About This Manual
This manual is designed to provide full information about the setting up and use of the
Q200.
•
Section 1 WARNING AND CAUTIONS gives general information to be aware
of when installing or using the Q200.
•
Section 2 INTRODUCTION gives a general introduction to the Q200 and its
operation.
•
Section 3 UNPACKING provides a checklist for the components supplied with
the Q200.
• Section 4 INSTALLATION REQUIREMENTS explains the installation
requirements for the Q200 before use.
•
Section 5 CONSOLE FAMILIARISATION familiarises the user with the Q200's
console and front panel interface.
•
Section 6 HAND UNIT FAMILIARISATION familiarises the user with the hand
unit, key panel and controls.
•
Section 7 POWER UP AND INSTALLATION this section describes how to
switch the Q200 on and the initialisation routine that follows.
•
Section 8 PROGRAMMING THE Q200 gives a detailed description of each
program function and instructions for viewing and altering them.
•
Section 9 CALIBRATING THE Q200 describes the procedure for calibrating
the Q200 to a standard leak.
•
Section 10 THE Q200 IN USE gives guidance on the precautions that may
need to be taken when calibrating and using the Q200 in a typical industrial
environment.
•
Section 11 INTERFACING THE Q200 describes how the Q200 can be
connected to peripheral devices such as printers or chart recorders.
•
Appendix A Q200 Specification gives a full specification for the Q200.
•
Appendix B Preventative Maintenance gives information on general
preventative maintenance for the Q200.
•
Appendix C Fault/Error/Warning Messages explains possible fault, error and
warning conditions and suggests corrective actions.
•
Appendix D Spares/Options List gives a list of the spares and options available
for the Q200.
•
Appendix E RS232 Connector Details lists the pin-outs and connectors for the
Q200.
•
Appendix F Applications describes some of the typical application areas in
which the Q200 is used.
Q200 User Manual Preliminary
200120/Revision 10
iii
•
Appendix G Changing the Internal Gas Cylinder details the procedure for
changing the internal gas cylinder on the Q200.
•
Appendix H Installing/Changing the Battery details the procedure for installing
and changing the battery on the Q200.
•
Appendix I Changing The Probe/Sinter details the procedure for changing the
Q200's hand unit probe and sinter.
•
Appendix J Leak Rate and Concentration Formulae lists the formulae for
converting between leak rates in different units and between leak rate and
concentration.
•
Appendix K Program Structure details the program structure for reference
when programming the Q200 for use.
•
Glossary of terms used within this manual.
•
Index.
Q200 User Manual Contents
200120/Revision 10
1
Table of Contents
Disclaimer.........................................................................................................................i
Copyright..........................................................................................................................i
Trademarks......................................................................................................................i
Sales and Support ............................................................................................................i
Document History.............................................................................................................i
About This Manual ..........................................................................................................ii
Table of Contents........................................................................................................... 1
1.0 WARNING AND CAUTIONS............................................................................ 1-1
1.1 HAND UNIT DETECTOR.............................................................................. 1-1
1.2 Sinter.............................................................................................................1-1
1.3 Configuring the Q200....................................................................................1-1
1.3.1 Changing from capillary mode to sinter mode.........................................1-2
1.3.2 Changing from sinter mode to capillary mode.........................................1-2
1.3.3 Changing between sinters.......................................................................1-3
1.3.4 Re-configuring the instrument..................................................................1-3
1.3.5 Measuring ranges and configuration codes............................................. 1-4
1.4 ARGON GAS SUPPLY................................................................................. 1-5
1.5 POWER SUPPLY.........................................................................................1-5
1.6 TRANSPORTING THE Q200........................................................................1-6
1.7 DISPOSAL....................................................................................................1-6
1.8 ENVIRONMENTAL....................................................................................... 1-6
1.9 EC DECLARATION OF CONFORMITY .......................................................1-7
2.0 INTRODUCTION.............................................................................................. 2-1
3.0 UNPACKING....................................................................................................3-1
4.0 INSTALLATION REQUIREMENTS..................................................................4-1
4.1 REMOVING THE CASE LID.........................................................................4-1
4.2 GAS SUPPLY...............................................................................................4-1
4.3 POWER SUPPLY.........................................................................................4-2
4.4 STORAGE AND OPERATING ENVIRONMENT..........................................4-2
4.5 OPERATING MODES................................................................................... 4-2
4.5.1 PORTABLE INSTALLATION................................................................... 4-2
4.5.1.1 CHECKING THE INTERNAL ARGON SUPPLY .............................. 4-3
4.5.1.2 CHECKING THE BATTERY............................................................4-3
4.5.2 FIXED INSTALLATION............................................................................4-3
4.5.2.1 RUNNING FROM AN EXTERNAL GAS SUPPLY...........................4-3
4.5.2.2 RUNNING FROM THE EXTERNAL POWER SUPPLY...................4-4
5.0 CONSOLE FAMILIARISATION........................................................................ 5-1
5.1 FRONT PANEL LAYOUT .............................................................................5-1
5.1.1 KEY-SWITCH ORIENTATION................................................................. 5-1
5.1.2 FRONT PANEL KEYS.............................................................................5-2
5.1.3 BATTERY CHARGER INDICATOR.........................................................5-2
6.0 HAND UNIT FAMILIARISATION...................................................................... 6-1
6.1 HAND UNIT KEYS........................................................................................6-2
6.2 HAND UNIT INDICATORS ........................................................................... 6-2
6.2.1 WARNING LED .......................................................................................6-2
6.2.2 PEAK HOLD LED....................................................................................6-2
6.3 HAND UNIT BAR GRAPH DISPLAY............................................................6-2
7.0 POWER UP AND INSTALLATION...................................................................7-1
7.1 SWITCH ON .................................................................................................7-1
7.2 INSTALLATION ............................................................................................7-1
8.0 PROGRAMMING THE Q200............................................................................ 8-1
8.1 CALIBRATE MENU ......................................................................................8-1
8.1.1 CALIBRATION LEVEL.............................................................................8-1
8.1.2 RE-CALIBRATION INTERVAL................................................................ 8-2
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200120/Revision 10
8.1.3 CALIBRATION FACTOR..........................................................................8-3
8.2 CONFIGURE MENU .....................................................................................8-3
8.2.1 CLEAN TIME............................................................................................8-3
8.2.2 ALARM LEVEL.........................................................................................8-3
8.2.3 TRACE GAS CONCENTRATION ............................................................8-4
8.2.4 AUTO ZERO ............................................................................................8-5
8.2.5 DISPLAY TYPE........................................................................................8-5
8.2.6 RESET PARAMETERS............................................................................8-6
8.2.7 GAS SUPPLY...........................................................................................8-6
8.3 DIAGNOSTICS MENU ..................................................................................8-7
8.3.1 BATTERY VOLTAGE...............................................................................8-7
8.3.2 TEMPERATURE......................................................................................8-7
8.3.3 DETECTOR FREQUENCY......................................................................8-7
8.3.4 RE-CALIBRATION...................................................................................8-8
8.3.5 SOFTWARE VERSION NUMBER ...........................................................8-8
8.4 SET DATE/TIME MENU................................................................................8-8
8.4.1 DATE........................................................................................................8-8
8.4.1.1 DAY..................................................................................................8-9
8.4.1.2 MONTH ............................................................................................8-9
8.4.1.3 YEAR................................................................................................8-9
8.4.2 TIME.......................................................................................................8-10
8.4.2.1 HOURS...........................................................................................8-10
8.4.2.2 MINUTES .......................................................................................8-10
8.5 EXITING THE MENU STRUCTURE ...........................................................8-11
9.0 CALIBRATING THE Q200................................................................................9-1
10.0
THE Q200 IN USE.......................................................................................10-1
10.1 STANDBY MODE........................................................................................10-1
10.2 SAMPLE MODE..........................................................................................10-1
10.3 INSTRUMENT CALIBRATION....................................................................10-2
10.4 GENERAL TIPS ON LEAK DETECTION....................................................10-3
10.5 ADJUSTING THE VOLUME........................................................................10-6
10.6 BACKGROUND CONTAMINATION............................................................10-6
10.7 RESULTS STORAGE AND PRINTOUT......................................................10-7
11.0
INTERFACING THE Q200 ..........................................................................11-1
11.1 INTERFACING TO A PRINTER..................................................................11-1
11.2 INTERFACING TO A CHART RECORDER................................................11-1
Appendix A Q200 Specification.................................................................A-1
Appendix B Preventative Maintenance .....................................................B-1
Appendix C Fault/Error/Warning Messages..............................................C-1
Appendix D Spares/Options List ...............................................................D-1
Appendix E RS232 Connector Details ......................................................E-1
Appendix F Applications............................................................................F-1
Appendix G Changing the Internal Gas Cylinder ......................................G-1
Appendix H Installing/Changing the Battery..............................................H-1
Appendix I Changing The Probe/Sinter.......................................................I-1
Appendix J Leak Rate and Concentration Formulae..................................J-1
Appendix K Program Structure..................................................................K-1
Glossary.......................................................................................................................L-1
Index................................................................................................................................i
Q200 User Manual Contents
200120/Revision 10
3
List Of Figures
Figure 1: Q200 Case Lid Containing Accessories.......................................................3-1
Figure 2 Removing the Case Lid.................................................................................4-1
Figure 3: Front Panel Layout.......................................................................................5-1
Figure 4: Hand Unit Display and Keyboard.................................................................6-1
Figure 5: Changing the Internal Gas Cylinder............................................................ G-1
Figure 6: Changing the Battery ...................................................................................H-1
Figure 7: Fitting the Probe............................................................................................I-1
Figure 9: Location of Sinter..........................................................................................I-2
Figure 10: Q200 Menu Structure.................................................................................K-1
Q200 User Manual
WARNING AND CAUTIONS
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1-1
1.0 WARNING AND CAUTIONS
This section explains the warnings and cautions that should be observed when
installing or using the Q200.
1.1 HAND UNIT DETECTOR
The detector operates at elevated temperatures; the user should proceed with caution
whenever the hand unit nozzle is removed.
The detector contains a radioactive source that should never be tampered with. The
detector contained within the hand unit has the following characteristics:
Nuclide Nickel 63
Radiation Beta rays
Content 370 MBq
Beta energy 60 keV Max
Range in air 50 mm approximately
Half-life 100 years
The primary Beta rays are completely contained within the detector cell and provide no
hazard to the user during normal operation. National Regulations relating to the control
of radioactive sources vary from country to country. It is a requirement in some
countries, and a practice that we would recommend that a competent person be
appointed to be responsible for the instrument. Their duties would be to ensure proper
care is taken of the instrument and all users are instructed in the use of the instrument
and not to attempt access to the radioactive sources. In the event of damage or loss
occurring, there may be a requirement to notify the competent authority.
Specific instructions may accompany this manual describing any further national
regulations governing the use, storage and transportation of equipment containing
radioactive sources. In the UK the radioactive source must be checked at least every
24 months for leakage. The supplier of the equipment can provide this service.
1.2 SINTER
Periodically the user should remove the nozzle and inspect the sinter, see Appendix I
for more information. A new sinter should be fitted if the current sinter is discoloured
indicating deposits of contaminants exist on its surface. Progressive blockage of the
sinter can also be observed by progressive reduction in detector response to standard
leaks or increasing calibration factors when performing calibration sequences.
1.3 CONFIGURING THE Q200
The Q200 has been factory configured to match your requirements with respect to
language option, the type of trace gas to be used, probe type and the displayed units.
If a configuration change is required, it can be performed as detailed below.
Q200 User Manual
WARNING AND CAUTIONS
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200120/Revision 10
1.3.1 CHANGING FROM CAPILLARY MODE TO SINTER MODE.
CAUTION: Before changing the hand unit probe ensure that the hand unit
detector block is cool.
1. Remove the capillary probe nozzle from the nozzle cone by pulling the probe
nozzle out of the nozzle cone. Ensure that the capillary probe nozzle is pulled
out of the nozzle cone in the line of the hand unit to avoid bending the capillary
probe needle.
2. Unscrew the nozzle cone from the hand unit.
3. Unscrew the capillary needle probe and its housing from the front face of the
detector assembly and store in a clean dry place. Note that the small knurled
cap on the housing retains the capillary needle probe in the housing.
Unscrewing the housing using the larger knurled flange adjacent to the front
face of the detector assembly will allow the needle probe and its housing to be
removed from the detector assembly as a single entity.
4. Locate the required sinter and inspect the seal around the periphery of the
sinter to ensure that it is not damaged. Damage to the seal will compromise the
performance of the instrument by allowing an excessive amount of air to enter
the detector. Appendix D contains details of replacement seals that can be
fitted to the sinter. Fit the sinter into the front of the detector assembly. Use a
broad flat bladed screwdriver to tighten the sinter into the detector assembly.
5. Screw the nozzle cone back into place on the hand unit.
6. Push the sinter probe nozzle firmly into the nozzle cone.
7. Re-configure the instrument as outlined in 1.3.3.
8. Perform a cleaning cycle of at least one hour.
1.3.2 CHANGING FROM SINTER MODE TO CAPILLARY MODE.
CAUTION: Before changing the hand unit probe ensure that the hand unit
detector block is cool.
1. Unscrew the nozzle cone from the hand unit.
2. Using a broad bladed screwdriver, unscrew the sinter assembly from the front
face of the detector assembly and store in a clean dry place.
3. Remove the sinter probe nozzle from the nozzle cone.
4. Locate the capillary needle probe and it’s housing and inspect the seal around
the periphery of the housing to ensure that it is not damaged. Damage to the
seal will compromise the performance of the instrument by allowing an
excessive amount of air to enter the detector. Appendix D contains details of
replacement seals that can be fitted to the housing. Screw the capillary needle
probe and its housing into the front face of the detector assembly until finger
tight.
5. Screw the nozzle cone back into place on the hand unit.
WARNING AND CAUTIONS
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200120/Revision 10
1-3
6. Push the capillary probe nozzle over the capillary needle probe and into the
nozzle cone, taking care to ensure that no bending stresses are applied to the
capillary needle probe.
7. Re-configure the instrument as outlined in 1.3.3.
8. Perform a cleaning cycle of at least one hour.
1.3.3 CHANGING BETWEEN SINTERS
CAUTION: Before changing the hand unit probe ensure that the hand unit
detector block is cool.
1. Unscrew the nozzle cone from the hand unit.
2. Using a broad bladed screwdriver, unscrew the sinter assembly from the front
face of the detector assembly and store in a clean dry place.
3. Locate the required sinter and inspect the seal around the periphery of the
sinter to ensure that it is not damaged. Damage to the seal will compromise the
performance of the instrument by allowing an excessive amount of air to enter
the detector. Appendix D contains details of replacement seals that can be
fitted to the sinter. Fit the sinter into the front of the detector assembly. Use a
broad flat bladed screwdriver to tighten the sinter into the detector assembly.
4. Screw the nozzle cone back into place on the hand unit.
5. Re-configure the instrument as outlined below.
6. Perform a cleaning cycle of at least one hour.
1.3.4 RE-CONFIGURING THE INSTRUMENT
1. Switch the instrument on and ensure that the security key-switch is in the
program position.
2. With the console display reading 'Calibrate' press the Zero
(hand unit) key
and the Standby\Run
(console) key simultaneously. This will bring up a fourdigit numeric configuration code on the console display. The first digit of the
code will be flashing.
Digit 1234
Code 1234
Code
Digit 1: Agent: 0. English
WARNING AND CAUTIONS
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200120/Revision 10
1. American
2. German
Digit 2: Units: 0. ml/s
1. ppm
Digit 3: Gas Type: 0. SF6
1. Undefined
Digit 4: Probe Type: 0. H Sinter
1. Capillary
2. M Sinter
3. L Sinter
3. Using the Increment \ Decrement
, Scroll Left \ Scroll Right keys the
desired configuration code can be entered. If the operator then presses the
Select
key the instrument will verify that the code entered is a valid one. If an
invalid code is entered, then an 'Invalid Code' message will be displayed for a
two second interval, then the operator will be given two further chances to reenter a valid code. If a valid code is not entered within three attempts the
instrument will revert back to the 'Configure' prompt.
4. If the Select
key is pressed with a valid code being displayed, a 'Valid Code'
message will be displayed for a two-second interval. The instrument will then
perform to the new configuration parameters. Note that changing the
configuration code clears existing parameters and will set calibration and alarm
levels to the default values for the new configuration.
CAUTION: If the instrument is re configured then it should be re calibrated as
described in this manual.
1.3.5 MEASURING RANGES AND CONFIGURATION CODES
The following tables illustrate the measuring ranges available for the various inlet
probes based on 100% trace gas concentration:
Q200 User Manual
WARNING AND CAUTIONS
200120/Revision 10
1-5
Leak-Rate Measuring Ranges For SF6 / ml/s
Probe Type Capillary H Sinter M Sinter L Sinter
Range 0.0 x 10
-10
⇓
1.8 x 10
-7
0.0 x 10
-8
⇓
1.8 x 10
-5
0.0 x 10
-7
⇓
1.8 x 10
-4
0.0 x 10
-6
⇓
1.8 x 10
-3
Alarm/Cal. 1.0 x 10
-10
⇓
1.8 x 10
-7
1.0 x 10
-8
⇓
1.8 x 10
-5
1.0 x 10
-7
⇓
1.8 x 10
-4
1.0 x 10
-6
⇓
1.8 x 10
-3
Config. Code 0001 0000 0002 0003
Concentration Measuring Ranges For SF6 / ppm
Probe Type Capillary H Sinter M Sinter L Sinter
Range N/A 0.0
⇓
18.09
0.0
⇓
180.0
0.0
⇓
1800
Alarm/Cal. N/A 0.01
⇓
18.00
0.1
⇓
180.0
1
⇓
1800
Config. Code N/A 0100 0102 0103
When the M or L Sinters or the Capillary probe are fitted, the ranges over which the
instrument may be calibrated are automatically changed to match the usable range of
the instrument. Appendix A contains a full list of the operating, calibration and alarm
ranges for all the inlet probes over a range of trace gas concentrations.
1.4 ARGON GAS SUPPLY
The instrument requires a supply of Argon that is at least 99.998% pure. This is
supplied with the instrument in a gas cylinder that conforms to BS 5045/3/B.
The gas cylinder should be filled to a pressure no greater than 200 bar (2900 PSIG)
maximum, and regularly checked for damage or fatigue and that the cylinder is still
within the validity of the test period indicated by the plastic collar on the stem of the
cylinder valve.
If an external gas supply is used the pressure supplied to the inlet port should not
exceed 4 bar (58 PSIG) maximum.
1.5 POWER SUPPLY
The instrument is supplied with an internal 12 Volt, gel electrolyte battery and a battery
charger. Both items are designed for use with the Q200 only. The manufacturer
accepts no responsibility if either item is operated with any equipment other than the
Q200. Information on spares may be found in Appendix D.
The battery charger must be run only from a mains supply that has a protective earth. It
is designed to be used on a flat surface next to the instrument and with adequate
clearance for ventilation. It should not be used whilst still located in the lid infill.
Q200 User Manual
WARNING AND CAUTIONS
1-6
200120/Revision 10
The internal 12 Volt battery has inline protective fuse T2A/250V. A replacement fuse
must be of an appropriate type and rating.
1.6 TRANSPORTING THE Q200
Transport of the instrument is subject to regulation in most countries. It is also subject
to international rules when transportation is between two different countries. If the
instrument needs to be transported, seek expert advice prior to shipping.
1.7 DISPOSAL
If there is an accident that damages the hand unit beyond repair or when the
instrument has exceeded its useful life, the unit must be disposed of through an
approved contractor. In the United Kingdom, the manufacturer can accept units for
disposal. Note that a charge will be made for the disposal of radioactive sources. In
other countries, the National Radiological Protection Organisation should be contacted
for advice.
1.8 ENVIRONMENTAL
Do not use the instrument:
•
In explosive atmospheres.
•
Outside the specified operating temperature range.
•
With hazardous or toxic gases.
•
In an environment where water could be drawn into the probe.
•
Where the variation in background level is greater than the calibration level.
WARNING AND CAUTIONS
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200120/Revision 10
1-7
1.9 EC DECLARATION OF CONFORMITY
As detailed under the following:
•
The European Low Voltage Directive 73/23/EEC (amended by 93/68/EEC).
•
The Electromagnetic Compatibility Directive 89/336/EEC (amended by 91/263/EEC
and 92/31/EEC), the declaration of conformity is provided for the following:
Equipment: Q200 Trace Gas Leak Detector
Manufacturer: Uson Ltd
Western Way
Bury St. Edmunds
Suffolk
United Kingdom
IP33 3SP
Transposed Harmonised Standards: BS EN 61010-1:1993 Safety requirements
for electrical equipment for measurement,
control and laboratory use.
BS EN 50081-1:1992 Electromagnetic
Compatibility: Generic emission standard
for light industry.
BS EN 50082-1:1992 Electromagnetic
Compatibility: Generic immunity standard
for light industry.
Name Of Responsible Person: Mr A Hawes
Signature:
Date: 12 March 1996
Position: Senior Development Engineer.
Address Of Responsible Person: Uson Ltd
Western Way
Bury St. Edmunds
Suffolk
United Kingdom
IP33 3SP
Q200 User Manual
INTRODUCTION
200120/Revision 10
2-1
2.0 INTRODUCTION
The Q200 is a high sensitivity leak detector used to locate and quantify leaks with
electron capturing trace gases. The instrument may be used in a variety of industrial
and scientific applications and environments. It is lightweight and robust and comprises
a hand unit, control console, rechargeable battery and Argon gas cylinder, contained
within a case for complete portability. Facilities are built in to allow the instrument to be
operated using external gas and power supplies.
The instrument is microprocessor based, using a Vacuum Fluorescent Display (VFD) to
provide a rapid and accurate readout of leak rates. The built-in memory is capable of
storing up to one hundred separate leak rate readings, which can be output to a printer
via the built in RS232 interface connector.
The detection principle uses a single Electron Capture Detector (ECD), utilising a low
power radioactive source contained within the hand unit. To measure for leaks, the
component under test is filled with a trace gas until there is a slightly higher pressure
than ambient within the component. This condition will cause the trace gas to leak
through any cracks, holes or porous areas within the component. Leaking trace gas will
then be detected and quantified by the Q200.
Each instrument is factory configured for a specific trace gas and measurement unit.
By default the instrument is configured for SF
6
although configuration for other gases is
available on special order.
This manual is written specifically for an instrument configured to SF6, H Sinter
and ml/sec. Instruments configured for other gases, sinters and units will
perform identically except that some display formats are different, and the range
and step sizes for calibration and alarm levels are different. The user may
convert between leak rates in different units by referring to Appendix J.
UNPACKING
Q200 User Manual
200120/Revision 10
3-1
3.0 UNPACKING
Every effort is made to ensure that the instrument is despatched from the
manufacturers with the contents intact. Please ensure that when unpacking, the
following components are present and undamaged, If this is not the case, contact your
supplier immediately.
The majority of components supplied with the Q200 are housed in the console case lid,
as illustrated in Figure 1.
Figure 1: Q200 Case Lid Containing Accessories
•
Gas cylinder spanner to allow the internal gas cylinder to be removed.
•
Battery charger and lead to allow the internal battery to be recharged in-situ.
•
Battery charger adapter to allow a spare battery to be recharged.
•
Battery charger mains lead.
•
Hose connector to allow the instrument to be supplied with argon from an external
source.
Supplied separately should be:
•
User manual.
•
Calibration certificate.
•
Two keys for the key-switch.
•
Two keys for the instrument case.
Q200 User Manual
UNPACKING
3-2
200120/Revision 10
•
A spare fuse for the battery charger is located in the fuse drawer section of the
charger mains socket inlet.
A range of standard leaks to be used during calibration and sinters to modify the
operating range of the Q200 are available from your supplier, see Appendix D for a list
of spares and options.
INSTALLATION REQUIREMENTS
Q200 User Manual
200120/Revision 10
4-1
4.0 INSTALLATION REQUIREMENTS
This section explains the installation requirements for the Q200 before use.
4.1 REMOVING THE CASE LID
Before the instrument is operated, the user may wish to remove the lid of the case and
store in a safe place, as illustrated in Figure 2:
Hinges
Figure 2 Removing the Case Lid
To remove the case lid, unlock the case, release the buckles on the front of the case
and raise the lid. Whilst holding the case lid, slide the lid to the left, this will detach the
lid from the base of the case.
4.2
GAS SUPPLY
A supply of clean, dry, Argon gas of at least 99.998% purity is required to enable the
instrument to function to its specification. It is essential to the function of the Electron
Capture Detector, that impurities in the Argon supply do not exceed the following
concentrations:
•
Total Halogen (Cl, Fl, I, Br) 1ppb (1 in 10
9
)
•
Total Hydrocarbon 50 ppm
•
Total Oxygen 10 ppm
•
Water 50 ppm
Q200 User Manual
INSTALLATION REQUIREMENTS
4-2
200120/Revision 10
4.3
POWER SUPPLY
The instrument can operate from the internal 12V battery or via the external battery
charger supplied with the instrument. The battery charger enables the user to charge
the internal battery or to power the instrument independently. When external power is
connected in this way, the instrument can be used with the battery fitted or removed.
If the instrument is to be used in an environment where it is inconvenient or not
possible to run the instrument with the charger connected and where, for operational
reasons, long recharging times cannot be accommodated, a spare battery may be
purchased. It is then possible to maintain one battery fully charged using the standard
battery charger and cable and the battery charger adapter supplied with the instrument.
This will allow the minimum of down time while exchanging the fully charged battery for
the battery within the instrument, which may then be charged remotely while the
instrument remains operational. Removal and replacement of the battery is described
in Appendix H.
The battery charger is designed for use on a flat surface adjacent to the
instrument and with adequate clearance around the charger for ventilation. It
should not be used whilst still located in the lid infill. Be aware that the internal
12-Volt battery is protected with a T2A/250V inline fuse.
The battery is disconnected for shipping purposes. To reconnect the battery, refer to
Appendix H.
4.4
STORAGE AND OPERATING ENVIRONMENT
So the instrument performs to its published specification the user should ensure that
the instrument is stored and operated in the following environment:
•
5°C to 45°C.
•
A location away from moisture, strong draughts, explosive compounds, solvents,
intense heat and large concentrations of the trace gas being detected.
4.5
OPERATING MODES
The instrument can be operated in either a portable mode, where the instrument can
be transported to different locations and environments or a fixed mode, where the
instrument is installed at a fixed site.
4.5.1 PORTABLE INSTALLATION
Before operating the instrument in this mode the user should ensure that there is an
adequate supply of Argon and the battery is sufficiently charged to perform all leakchecking duties.
INSTALLATION REQUIREMENTS
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4-3
4.5.1.1 CHECKING THE INTERNAL ARGON SUPPLY
To check the internal gas supply simply turn the internal gas cylinder on by moving the
gas bottle handle to the left. The gas bottle handle is accessible through an aperture in
the console when the handgun is removed from its holder. The pressure gauge on the
regulator, which is visible through an aperture to the right of the gas bottle handle,
should be examined to ensure there is a sufficient gas supply to perform leak-checking
duties. A pressure of 150 bar will give approximately 20 hours of continuous use. When
the pressure falls below 10 bar (145 PSIG) the instrument becomes non-operational. If
there is insufficient Argon available in the internal cylinder, change the internal cylinder
by following the procedure laid out in Appendix G.
Remember to turn the gas supply off by moving the gas bottle handle to the right
when the instrument is not in use.
4.5.1.2 CHECKING
THE BATTERY
The battery voltage may be checked by entering the 'Diagnostics' menu as described in
Section 8.3.
Running the instrument while charging the battery over a 16-hour period recharges the
battery adequately for a further 8 hours of portable operation. However this is not
recommended as a regular mode of operation as the battery capacity will be slowly
eroded. Running the instrument in the detector clean mode while charging is also
possible but a 24-hour charge is recommended in this case. To recharge the battery:
•
Plug the battery charger jack in to the battery charger connector, marked +- and
located to the rear of the console. Push the battery charger connector down and
turn clockwise to secure.
•
Connect the charger to the mains supply using the lead supplied.
•
Switch on the mains supply. The green light on the front of the battery charger
indicates when the charger is powered. The green indicator on the instrument's
console front panel (
+-
) indicates that the battery, if fitted, is being charged.
4.5.2 FIXED INSTALLATION
In this mode it is recommended that the instrument be run from a large external gas
cylinder with the battery charger connected to the mains supply and switched on
permanently. This will have the effect of extending the gas supply and the battery, if
fitted, will be maintained in a fully charged state.
4.5.2.1 RUNNING
FROM AN EXTERNAL GAS SUPPLY
In most cases the internal 600cm3 gas cylinder is left connected. If the internal gas
cylinder is to be removed, (see Appendix G for more details), then a regulator blanking
plug must be connected in place of the internal cylinder before connecting an external
gas supply. Appendix D contains details of regulator blanking plugs.
The following procedure should be observed when connecting the instrument to an
external gas supply:
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INSTALLATION REQUIREMENTS
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•
The external gas cylinder should be sited as close as possible to the instrument
and clamped to a bench or other rigid structure to avoid the possibility of injury
caused by the external gas cylinder toppling over.
•
The internal cylinder may remain in place but should be turned off. The instrument
may be run without an internal cylinder fitted however in this case a regulator
blanking plug must be obtained from the supplier, and fitted securely to the internal
cylinder connection.
•
Connect a clean regulator to the external gas cylinder and use nylon tubing to
connect it to the instruments external gas connector, using the hose connector from
the spare's box.
•
Turn on the external gas supply and set the regulator head to give a pressure of 3
to 4 bar.
•
The configuration parameter gas supply must be set to external; this has the effect
of disabling the low gas warning. See section 8 for details of how to program the
instrument.
4.5.2.2 RUNNING
FROM THE EXTERNAL POWER SUPPLY
The external power is supplied via the mains operated charging unit. When connected,
the charger will supply 12V DC via the internal battery. When the console is switched
off with the charger still connected to the instrument and mains power supplied to the
charger, the internal battery is recharged. When the console is switched on with the
charger still connected, the instrument will be powered, but recharging of the internal
battery will take place at a reduced rate.
If the internal battery requires recharging, it is recommended that the instrument be
switched off, with the battery charger connected, for a period of not less than eight
hours. To recharge the battery fully, turn off the instrument, connect the battery charger
as detailed in section 4.5.1.2 and leave on charge for 16 hours. Running the instrument
for an 8-hour day from the battery and charging for 16 hours overnight will maintain the
battery in a fully charged state.
CONSOLE FAMILIARISATION
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5-1
5.0 CONSOLE FAMILIARISATION
This section familiarises the user with the instruments console and front panel
interface.
5.1
FRONT PANEL LAYOUT
The instrument front panel consists of an eleven key panel, key-switch, battery charger
indicator and twenty-character display as illustrated in Figure 3.
- +
200
Figure 3: Front Panel Layout
5.1.1 KEY-SWITCH ORIENTATION
The key-switch has the following orientation:
Run (key removed): The user can make measurements, select standby mode
clean the detector, zero the display, select peak hold on and off, display the
time and date, cancel warning messages, print stored results and clear the
storage buffer.
Run (key inserted): Same as run except the user can gain access to program
mode by turning the key-switch to the program position (fully clockwise).
Program (key inserted): In program mode the user can alter the program
parameters.
CONSOLE FAMILIARISATION
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5.1.2 FRONT PANEL KEYS
Each key on the front panel performs a different function, a description of which
follows:
Calibrate: If pressed in program mode the instrument will enter the calibration
sequence.
Clean: If pressed the instrument will clean the detector by elevating the
detector temperature to 110°C. The detector will remain at this elevated
temperature for the period defined by the 'Clean Time' parameter in the
configuration menu (see section 8 for details).
Print: If this key is pressed and a printer is connected and is on-line, any
readings that have been stored will be printed.
Standby/Sample: This key is pressed to toggle the instrument between
'standby' and 'sample' modes, whilst the key switch is in the
or positions.
Cancel: If pressed whilst a program parameter is being displayed, then that
parameter will be reset to its default setting. This key also cancels errors and
exits functions such as the clean facility.
Clock Edit: This key is used to either set the date or time, if setting the date or
time or to display the current date and time.
Scroll Left: If pressed in program mode the user will move backwards within
the program structure.
Scroll Right: If pressed in program mode the user will move forwards within
the program structure.
Increment: If pressed in program mode the user can increment the currently
selected program parameter. If pressed in either sample mode the user can
increase the audio output volume.
Decrement: If pressed in program mode the user can decrement the currently
selected program parameter. If pressed in either run or calibrate mode the user
can reduce the audio output volume.
Select: Press to enter and exit the menu system.
5.1.3 BATTERY CHARGER INDICATOR
Battery charger LED: Lights when the battery charger is connected and
mains power is supplied to the battery charger.
+-
HAND UNIT FAMILIARISATION
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6-1
6.0 HAND UNIT FAMILIARISATION
The instrument hand unit consists of a rugged case. This houses a sample probe,
detector with amplifier, pump, ten segment LED bar graph display, three key switch
panel and two LED indicators, as illustrated in Figure 4. A service cable connects the
hand unit with the gas supply and console electronics.
Figure 4: Hand Unit Display and Keyboard
HAND UNIT FAMILIARISATION
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6.1
HAND UNIT KEYS
Each key on the hand unit performs a different function, a description of which follows:
Store: When pressed in sample mode the currently displayed reading is stored
in memory.
Zero: If this key is pressed in sample mode, the instrument will take the
reading at that instant as the new background reading. This will cause all ten
elements on the hand unit bar graph display to be extinguished; the audio to be
reset and the console display will read the minimum leak rate applicable to the
current instrument configuration. If pressed whilst the 'Reset Parameters Yes'
message is being displayed, then the instrument will reset all it's parameters to
their default values.
Peak Hold: When pressed, all subsequent readings will be subjected to the
Peak Hold function. This function monitors the peak (highest) reading taken
since the last zero was performed. When enabled the audio is still free running
enabling the leak site to be located. Pressing the
key a second time will
disable this function.
6.2
HAND UNIT INDICATORS
The hand unit of the instrument contains two indicators in the form of Light Emitting
Diodes (LED's).
6.2.1 WARNING LED
The Warning LED (
) is a red LED that will be illuminated when there is an
operational problem with the instrument, this will be accompanied by an audible
warning tone. See Appendix C for further details. It is also illuminated in program and
standby mode to indicate the instrument is not ready to use.
6.2.2 PEAK HOLD LED
The peak hold LED (
) is a green LED that will be illuminated whenever peak
hold is selected, and extinguished whenever peak hold is de-selected.
6.3
HAND UNIT BAR GRAPH DISPLAY
The hand unit on the instrument uses a ten segment LED bar graph to represent the
current leak rate with respect to the alarm or calibration level.
Midpoint equivalent to
the Alarm or Calibration level
Full Scale
Equivalent to 10x the
Alarm or Calibration Leve
l
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6-3
The midpoint on the hand unit bar graph represents the alarm or calibration level, with
the alarm level taking precedence if both are set. When the user is sampling and a leak
is present, the audio will build until the midpoint is reached, then a two-tone signal will
be emitted to indicate that the alarm level has been exceeded (this will not happen if
only the calibration level has been set).
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POWER UP AND INSTALLATION
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7.0 POWER UP AND INSTALLATION
This section will describe how to switch the instrument on, and the initialisation routine
that follows.
This manual is written specifically for an instrument configured to SF6, H Sinter,
ml/sec and an English agent. Instruments configured for other gases and units
will perform identically except that some display formats are different, and the
range and step sizes for calibration and alarm levels are different. The user may
convert between leak rates in different units by referring to Appendix J.
7.1
SWITCH ON
When switching the instrument on, the following procedure should be observed:
•
Remove the hand unit from its holder.
•
Turn on the gas supply by turning the gas bottle handle to the left, or turn on the
external gas supply.
•
Switch the instrument on via the on/off rocker switch, located in a recessed
aperture on the top right side of the raised portion of the console housing.
7.2
INSTALLATION
When the instrument is switched on the warning LED on the hand unit will light and the
instrument will carry out self-check routines. These routines check that the instrument
is of operational quality. If any faults, errors or warnings occur refer to Appendix C for
help. If a printer is connected the agent's address will be printed; an example of which
is shown below:
--------------------------------------------- D-Industrial Technology Ltd
---------------------------------------------Room 504B, No. 650
Xinzhuan Road
Shanghai, China P.R.
Tel Number: +86 21 51095332
Fax Number: +86 21 51069290
E-Mail: info@d-industrial.com
Web Site: WWW.d-industrial.com
Version 200XXX/X.X
---------------------------------------------- System Ready
-----------------------------------------------
POWER UP AND INSTALLATION
Q200 User Manual
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Note that, in the above printout, XXX represents the software language option and
version.
Once the self-check routines are completed the instrument detector will be heated until
it reaches its working temperature of 50
O
C, a process that takes approximately ten
minutes. During this period the instrument's configuration sequence will be displayed,
with a two-second delay between each display update:
**** Warming Up ****
Gas SF6
Units ml/s
Cal Off
Al 1.0x10-6ml/s
Throughout the initialisation routine the hand unit warning LED is illuminated. The hand
unit bar graph is used to indicate how much time is left before the instrument is
operational (full scale being ten minutes).
Once the instruments' detector has reached its working temperature it will sound a twotone audible signal then enter standby mode, if the key-switch is in either of the run
positions the display will show:
Standby
If the key-switch is in the program position the display will show:
Calibrate
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8.0 PROGRAMMING THE Q200
This section gives a detailed description of each program function and instructions for
viewing and altering them. The instrument has a multi-layered menu structure.
Appendix K details this structure, and can be used for reference when programming
the instrument.
This manual is written specifically for an instrument configured to SF
6
, ml/sec and an H
Sinter. Instruments configured for other gases and units and inlet configurations will
perform identically except that some display formats are different, and the range and
step sizes for calibration and alarm levels are different. The user may convert between
leak rates in different units by referring to Appendix J.
In program mode, four main menu categories are available to the user, they are:
•
Calibrate
•
Configure
•
Diagnostics
•
Set Date/Time
While in program mode the warning LED will be on to indicate the instrument is in
program mode (except when calibrating). If the key is inserted in the key-switch and is
set to the
position, then the first menu header will be displayed:
Calibrate
Using the
or keys, the user can move backwards and forwards within the top
level program structure. To enter a particular menu, the user must press the key
with the desired menu header being displayed. On pressing , the first parameter of
the selected menu will be displayed. To scroll through the selected menu the and
keys should be used. To reset a parameter to its default value, press the
key.
8.1 CALIBRATE MENU
The Calibrate menu contains three parameters, which are described in this section. To
enter the Calibrate menu, the user must press the key with the Calibrate menu
header displayed. To scroll through the Calibrate menu use the
keys, and to exit
the Calibrate menu press .
8.1.1 CALIBRATION LEVEL
The first parameter in the 'Calibrate' menu is:
Cal 1.0x10-7ml/s
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This parameter relates to the instrument's calibration level. The calibration level can be
read from the standard leak certificate, provided with any standard leak from your
supplier. The calibration level is the actual leak of trace gas coming from the leak
rather than the bulk leak rate. For example, if a standard leak has a bulk leak rate of
1x10
-4
ml/sec and has a 1% SF6 in Nitrogen gas supply, the actual trace gas leak rate
to be entered when calibrating to this leak is 1x10-6 ml/sec. (1x10-4 x 1/100 ml/sec, bulk
leak rate multiplied by SF6 concentration in the gas supply). The standard leak used is
usually equivalent to the required leak specification or alarm level.
Maximum Value 1.8 x10
-5
ml/s
Minimum Value 1.0 x10-8 ml/s
Increment 1.0 x 10-8 to 1.0 x 10-5 1.0 x 10-8 ml/s
1.0 x 10
-6
to 1.0 x 10-4 0.1 x 10-e ml/s
Default Value Off
The
and keys are used to adjust this value until it matches that printed on the
standard leak certificate, if a standard leak is being used.
When the M or L Sinters or the Capillary probe are fitted, the ranges over which the
instrument may be calibrated are automatically changed to match the usable range of
the instrument. Appendix A contains a full list of the operating, calibration and alarm
ranges for all the inlet probes.
8.1.2 RE-CALIBRATION INTERVAL
This second parameter in the 'Calibrate' menu is:
Recal Off
This parameter relates to the re-calibration interval, which is the period between
calibrations. The time set is in hours, and will be decremented once a calibration has
been performed. The value is only decremented while the instrument is actually
switched on. If however, the instrument is re-calibrated before the re-calibration interval
has expired, then the re-calibration interval will be reset to the value entered by the
user, and decrementing of this interval will resume when re-calibration is complete.
Maximum Value 48 Hours
Minimum Value Off
Increment 4 Hour Steps
Default Value Off
If the re-calibration interval is exceeded, the warning LED on the hand unit will
illuminate (it will already be on in program mode), the periodic audible warning will
sound, and the following warning will be displayed:
Warn: Cal Due
This warning will continue to be displayed until the
key is pressed to clear the
warning. The warning LED will stay on until the user re-calibrates the instrument. See
Section 9 for further details on how to calibrate the instrument.
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8.1.3 CALIBRATION FACTOR
The third parameter in the 'Calibrate' menu is:
Cal Factor 1.000
The calibration factor is automatically calculated during the calibration routine and
applied to all subsequent readings taken in the sample mode. The purpose of the
calibration factor is to compensate for minor variations in the performance of the
instrument between calibrations. The calibration factor cannot be changed by the user
but can be reset to its default value by pressing the
key.
Maximum Value 3.000
Minimum Value 0.300
Default Value 1.000
8.2
CONFIGURE MENU
The Configure menu contains seven parameters, which are described in this section.
To enter the Configure menu, the user must press the
key with the Configure menu
header displayed. To move through the Configure menu use the keys, and to exit
the Configure menu press .
8.2.1 CLEAN TIME
The first parameter in the 'Configure' menu is:
Clean Time 1:00 H:M
This parameter relates to the time for which the detector is held at its cleaning
temperature of 110°C, when the
key is pressed. The recommended cleaning period
for the instrument is one hour for mild contamination. This value can be adjusted using
the and keys. A time should be set that is sufficient to 'burn off' the contamination
to which the instrument has been subjected. It is advisable to perform a cleaning cycle
of one hour if the inlet configuration has been changed either to modify the operating
range of the instrument or for service purposes. This will ensure that the inlet of the
instrument is clean prior to the re-calibration that will be necessary after a change in
inlet configuration.
Maximum Value 16 Hours
Minimum Value 10 Minutes
Increment 10 Minutes
Default Value 1 Hour
8.2.2 ALARM LEVEL
The second parameter in the 'Configure' menu is:
Al 1.0x10-7ml/s
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Using the and keys, the alarm level can be adjusted to the required value. If the
alarm level is set then it will always be used in preference to the calibration level as the
midpoint on the bar graph display on the hand unit. The alarm level would normally be
set to the pass/fail leak specification of the unit under test.
Maximum Value 1.8 x10
-5
ml/s
Minimum Value 1.0 x10-8 ml/s
Increment 1.0 x 10
-8
to 1.0 x 10-5 1.0 x 10-8 ml/s
1.0 x 10-6 to 1.0 x 10-4 0.1 x 10-e ml/s
Default Value Off
When the M or L Sinters or the Capillary probe are fitted, the ranges over which the
alarm level may be set are automatically changed to match the usable range of the
instrument. Appendix A contains a full list of the operating, calibration and alarm ranges
for all the inlet probes.
The alarm level also sets the point at which the audio output, that rises in pitch as the
detected leak rate increases, changes to a two-tone audible warning that the alarm
level has been exceeded. The rate at which the pitch of the audio output increases is
scaled to the alarm level and the maximum frequency that the audio output attains is
independent of the alarm level set. If no alarm level is set, the audio output is scaled to
the calibration level but, in this case, no two-tone warning is given.
When results are printed, the alarm level sets the criterion for printing Pass or Fail
against individual results.
8.2.3 TRACE GAS CONCENTRATION
The third parameter in the 'Configure' menu is:
Trace Gas % 100%
This parameter relates to the trace gas concentration contained within the component
under test. Using the
and keys, the concentration can be adjusted to the required
value. The displayed leak rate is then automatically corrected to reflect the actual bulk
leak rate from the unit under test.
From a practical viewpoint it is best to use the lowest trace gas concentration that is
appropriate for the task to be performed. There are a number of benefits that result
from this approach. Firstly, a low trace gas concentration helps to limit the increase in
SF
6
background as leak testing is performed, particularly if a gross leaking component
is encountered. Secondly, the Q200 may be used with an H (or M) sinter to obtain the
required sensitivity which will be beneficial in terms of response and clear-down times,
The L sinter having response and clear-down times that are worse than the M sinter by
about a factor of ten. Thirdly, there is a benefit in terms of the reduction in cost of the
trace gas that is consumed during testing. Appendix A contains tables showing the
usable range of the instrument for the various inlet configurations over a range of trace
gas concentrations.
Maximum Value 100%
Minimum Value 0.1%
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8-5
Increment 0.1% to 1% in 0.1% steps
1% to 100% in 1% steps
Default Value 100%
8.2.4 AUTO ZERO
The fourth parameter in the 'Configure' menu is:
Auto Zero Off
Using the
and keys this parameter can be adjusted to the required setting. If the
auto zero is set to either slow, medium or fast then all readings taken by the instrument
will be subjected to the auto zero algorithm. This algorithm is used to 'track out'
background frequency drift due to varying background contamination.
Maximum Value Fast
Minimum Value Off
Increment Off to Slow to Medium to Fast
Default Value Off
8.2.5 DISPLAY TYPE
The fifth parameter in the 'Configure' menu is:
Display Auto
This parameter sets the manner in which leak rate information is presented on the
digital display on the console of the instrument. Using the
and keys this
parameter can be adjusted to present the information in a manner that is best suited for
interpretation by the operator.
Maximum Value x10
-5
Minimum Value x10-8, Auto
Increment Auto, x10-8, x10-7, x 10-6, x10
-5
Default Value Auto
When the display is set to Auto, the display will have the following format:
SF6 9999x10-eml/s
Where e is the variable exponent.
When a fixed exponent option selected, all leak rate results are displayed according to
that fixed exponent. Fixed exponent display options will have the following general
formats:
SF6 9999x10-8ml/s
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SF6 999.9x10-7ml/s
SF6 99.99x10-6ml/s
SF6 9.999x10-5ml/s
The Alarm and Calibration levels will be also displayed with the same format and will
be scaled appropriately to reflect the trace gas concentration that has been set.
8.2.6 RESET PARAMETERS
The sixth parameter in the 'Configure' menu is:
Reset Parameters No
This parameter is used to reset all program mode parameters to their default settings.
Using the
and keys this parameter can be toggled between no and yes.
To clear the program mode parameters select the 'Yes' option and press the
key on
the hand unit. The instrument will display:
Parameters Cleared
This message will be displayed for two seconds, to confirm that the parameters have
been reset to their default settings.
Maximum Value Yes
Minimum Value No
Increment No to Yes
Default Value No
If only one program mode parameter needs resetting then the user should scroll to that
parameter using the appropriate keys, and then press the
key on the console, to
reset it to its default value.
8.2.7 GAS SUPPLY
The seventh parameter in the 'Configure' menu is:
Gas Supply Internal
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8-7
This parameter is used to indicate whether the instrument's gas supply is internal or
external. Using the and keys this parameter can be toggled between internal and
external. If you are running from an external gas supply this parameter must be set to
external otherwise the low gas warning will be displayed. When set to external the low
gas warning is not active.
Maximum Value External
Minimum Value Internal
Increment Internal to External
Default Value Internal
8.3
DIAGNOSTICS MENU
The 'Diagnostics' menu contains five parameters that are described in this section. To
enter the Diagnostics menu, the user must press the key with the Diagnostics menu
header displayed. To move through the Diagnostics menu use the
keys, and to
exit the Diagnostics menu press .
8.3.1 BATTERY VOLTAGE
The first parameter in the 'Diagnostics' menu is:
Battery 12.2Volts
This parameter indicates the current battery voltage of the instruments internal battery.
8.3.2 TEMPERATURE
The second parameter in the 'Diagnostics' menu is:
Temperature 48.9ºC
This parameter indicates the current detector temperature.
8.3.3 DETECTOR FREQUENCY
The third parameter in the 'Diagnostics' menu is:
Frequency 4.00kHz
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The detector signal is a frequency that varies with the amount of trace gas entering the
detector. With no trace gas entering the instrument and with a clean detector, a
frequency of between 4 and 10 kHz should be displayed.
It is possible to toggle the internal pump on and off using the
key. The frequency
that is displayed with the pump on should be higher than the frequency displayed with
the pump off, indicating that ambient air is being drawn into the detector cell.
Frequencies higher than 20kHz may produce Check Detector warnings under some
circumstances. See Appendix C2.4 for more details.
8.3.4 RE-CALIBRATION
The fourth parameter in the 'Diagnostics' menu is:
Recal 0:50 H:M
This parameter displays the time remaining until a re-calibration will be requested. If no
re-calibration interval has been set in the Calibration menu then this parameter will
display:
Recal Off
8.3.5 SOFTWARE VERSION NUMBER
The fifth parameter in the 'Diagnostics' menu is:
Version: 200XXX/5.0
This parameter is the version number for the software that is fitted in the instrument,
where XXX represents the language option. Its purpose is for quoting to the supplier in
the event that there is a problem with the instrument.
8.4
SET DATE/TIME MENU
The 'Set Date/Time' menu contains two parameters and a further sub menu, which are
described in this section. This menu contains parameters for setting up the instruments
Real Time Clock. The Real Time Clock once set maintains the current date and time; it
is used for date and time stamping of results when the
key is pressed. These results
may be printed by connecting a suitable printer, as described in section 11. To enter
the Date/Time menu, the user must press the key with the Date/Time menu header
displayed. To move through the 'Set Date/Time' menu use the
keys, and to exit
the menu press the key.
8.4.1 DATE
The first parameter in the 'Set Date Time' menu is:
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Date 02/11/1999
Note that, for American language options, the date format will be presented as
MM/DD/YYYY.
To change any of the 'Date' settings the user must first enter edit mode by pressing the
key. To move throughout the 'Date' sub-menu use the keys. To exit the 'Date'
sub-menu and accept the new settings press the key, to exit without changing any
settings press the key. When the user presses the key to exit the 'Date' sub-
menu a confirmation message will be displayed for two seconds. This message
confirms that the Real Time Clock has been updated.
Date Set
If on pressing the
key the date entered is invalid e.g. 31/02/1999 an error message
will be displayed for two seconds and the Real Time Clock will not be updated.
8.4.1.1 DAY
The first parameter in the 'Date' sub-menu is:
Day 09
Using the
and keys this value can be adjusted to reflect the current day of the
month.
Maximum Value 31
Minimum Value 01
Increment 01
Default Value 01
8.4.1.2 MONTH
The second parameter in the 'Date' sub-menu is:
Month 11
Using the
and keys this value can be adjusted to reflect the current month of the
year.
Maximum Value 12
Minimum Value 01
Increment 01
Default Value 01
8.4.1.3
YEAR
The third parameter in the 'Date' sub-menu is:
Year 1999
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Using the and keys this value can be adjusted to reflect the current year.
Maximum Value 2050
Minimum Value 1998
Increment 01
Default Value 1998
8.4.2 TIME
The second parameter in the 'Set Date Time' menu is:
Time 03:58
To change any of the Time settings the user must first enter edit mode by pressing the
key.
To move throughout the 'Time' sub-menu use the
keys, and to exit the 'Time'
sub-menu and accept the new settings press key, to exit without changing any
settings press the key. When the user exits the 'Time' sub-menu a confirmation
message will be displayed for two seconds. This message confirms that the Real Time
Clock has been updated.
Time Set
8.4.2.1 HOURS
The first parameter in the 'Time' sub-menu is:
Hours 03
Using the
and keys this value can be adjusted to reflect the current hour of the
day.
Maximum Value 23
Minimum Value 00
Increment 01
Default Value 01
8.4.2.2
MINUTES
The second parameter in the 'Time' sub-menu is:
Minutes 15
Using the
and keys this value can be adjusted to reflect the current minute of the
hour.
Maximum Value 59
Minimum Value 00
Increment 01
Default Value 01
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8.5
EXITING THE MENU STRUCTURE
Any of the menus mentioned in Section 11 can be exited by moving the key-switch to
or , which will cause the instrument to enter standby mode.
CALIBRATING THE Q200
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9.0 CALIBRATING THE Q200
It is possible to operate the Q200 without calibrating the instrument (that is with the
Calibration Factor set to the default value of 1.000). In order to make accurate
measurements of leak rate or concentration with the Q200, it must be calibrated
against a standard leak or gas of known composition. Calibration should be carried out
each time the instrument is operated for the first time, then usually every 8 hours or
more frequently if required.
From the calibration routine the instrument will calculate a calibration factor. The
calibration factor is the ratio by which the actual measurement of leak rate obtained
from a standard leak differs from notional measurement of a leak of the same value
that is stored within the software of the instrument. This factor will be applied to all
subsequent readings taken in sample mode. This factor enables the instrument to
accurately measure leaks using the standard leak used during calibration as a
reference. The magnitude of the calibration factor can be examined after calibrating in
the 'Calibrate' menu, as described in section 8.1.3.
The calibration routine is initiated by pressing the
key on the console whilst in
program mode. Entering the program mode will cause the warning LED to be
illuminated. If the user has not set a calibration level then the display will read:
No Cal Leakrate Set
This message will be displayed for two seconds before the display returns to 'Calibrate'
and the user will not be able to calibrate the instrument until a calibration level is set. If
a calibration level is set the display will show:
Stabilising 50.0ºC
This message is displayed for ten seconds. This ten second delay is to allow the
detector signal to settle to a steady state. The warning LED will be extinguished and
the display will show:
Sample Background
Ensure that the probe is sampling a clean background and press the
key on the
hand unit, this has the effect of taking the detector signal at that instant as the
background signal. The display will show:
Offer Probe To Leak
This prompts the user to insert the hand unit probe in to the standard leak nozzle cone.
Once in place the user should press the
key on the hand unit, the display will show:
Wait
This message is displayed for ten seconds before readings are taken. This ten-second
delay is required to allow the flow of sample gas drawn from the standard leak to
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achieve a steady state, once the probe has been inserted into the cone on the
standard leak.
The calibration routine is now under way and the instrument display will reflect the
magnitude of the standard leak. When the calibration routine is entered the peak hold
function is automatically selected, confirmed by the peak hold LED (
) on the
hand unit being illuminated. This function can be de-selected by the user if required by
simply pressing the
key, at this instant the peak hold LED is extinguished.
When the user obtains a steady peak reading on the display the key should be
pressed to accept the calibrated level. At this point the instrument calculates the
calibration factor. If all is well an audible two tone signal will be given, with a display
message, to indicate calibration was successful before reverting to its previous state
before the
key was pressed with the warning LED illuminated.
Valid Calibration
If the calibration leak rate entered in the 'Calibrate' menu varies greatly from the
response measured during calibration with a resulting calibration factor that lies outside
the range 0.3 to 3.0, the console will display:
Error: Invalid Cal
The calibration factor will remain unchanged from the value prior to the latest attempt to
perform a calibration. To clear the error, press the
key. If this warning occurs, the
user should check that the calibration leak rate set in the instrument is the same as that
printed on the standard leak certificate, otherwise refer to Appendix C for other possible
remedies.
Since an invalid cal error leaves the calibration factor unchanged, it is possible to
continue leak checking. However, entering the sample mode from standby by pressing
the
key, the instrument will display a 'Warn: Not calibrated ' message to remind the
user that the instrument is being used in a manner where the results obtained may not
be reliable.
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10.0 THE Q200 IN USE
This section gives instruction on how to make measurements with the Q200. Before
the user takes measurements with the instrument, the following points should be
checked:
•
The instrument has been configured appropriately for the range over which the
instrument is to be used for the test that is to be performed.
•
The instrument has been calibrated to a standard leak appropriate to the
specification of the unit under test.
•
The concentration of trace gas in the unit under test has been entered into the
instrument; see Section 8 for more details.
•
If required, the instrument has been programmed to alarm at a leak rate
appropriate to the specification of the unit under test.
10.1
STANDBY MODE
When the instrument is powered up and the initialisation routine has been completed,
the display will show:
Standby
The instrument should be put into standby mode if it is not going to be used for five
minutes or more. While in standby mode the warning LED will be lit to indicate the
instrument is not ready to use. In this mode the display illumination is reduced saving
battery life, and the pump is switched off to avoid potential contamination to the
detector. If the user wants to enter sample mode the
key should be pressed, at this
point the warning LED will be switched off (if no errors or warnings have occurred).
10.2
SAMPLE MODE
After the key is pressed, the display will show:
Stabilising 50.0ºC
This message is displayed until the detector is in an operational state; this will be a
minimum of ten seconds. The display will show:
SF6 0.0x10-8ml/s
Sampling with the instrument can now commence. The manner in which the instrument
is used will invariably depend on the component under test.
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10.3
INSTRUMENT CALIBRATION
In order to obtain accurate and reproducible performance from the Q200, the manner in
which the instrument is calibrated is of the greatest importance. There are a few
general rules that should be borne in mind when performing instrument calibrations:
•
When starting from cold, that is, the instrument has been switched off with the
argon flow turned off for some time, for example if the instrument has been left off
overnight, the instrument should be allowed to warm up thoroughly to allow the
operation of the instrument to stabilise. A period of not less than thirty minutes is a
suitable period, preferably with the pump on.
•
Where the instrument is in continuous use, calibrations can be performed as
operational requirements or convenience dictates.
•
The area in which the calibration is to be performed must have a low background
level of SF
6
in comparison with the level at which the instrument is to be calibrated.
The background level becomes increasingly important as the calibration level
decreases. There are two simple methods of checking the SF
6
background; the one
that is used will depend on individual circumstances:
The first method requires the instrument to be removed to an area where clean
ambient air can be guaranteed. The easiest way of fulfilling this requirement is to
take the instrument outside.
The second method is appropriate if the instrument is used in an essentially fixed
installation; a supply of clean air can be derived from a compressed air cylinder with
a regulator or from a compressed air supply. If a compressed air supply is used,
special care must be taken to ensure that the air supplied to the instrument is free
of both compressor oil mist and water vapour. The presence of either of these
contaminants in the clean air supply will have a deleterious effect on the
performance of the instrument. The air supply should be arranged to flow at a rate
of a few tens of cc/second into a shroud that is a loose fit over the inlet probe of the
instrument. The empty barrel of a 50cc plastic syringe makes a convenient, cheap
and disposable shroud.
Set the instrument to the sample mode with the inlet probe in the supply of clean
air. Allow the instrument to stabilise and zero the instrument. Return the instrument
to the area where the calibration is to be performed without setting the standby
mode or performing another zero. Any positive indication on the display will give a
measure of the SF
6
background either in leak rate or concentration units,
depending on configuration.
If the background reading is a significant proportion of the calibration level, say
10% or higher, measures should be taken to reduce the background, for example,
temporarily increasing the ventilation rate.
When calibrations are performed using standard leaks, turn the standard leak on
and remove the blanking cap from the leak face prior to the commencement of the
calibration procedure in order to allow the flow from the leak to stabilise at the
calibrated value.
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Ensure that the calibration is performed in a draught free environment.
During calibration using a standard leak, the assumption that is made is that the
inlet probe of the Q200 scavenges all of the gas that emerges from the face of the
leak. This assumption is valid in draught free environments because the rate of
evolution of gas from the leak is a very small fraction of a cubic centimetre per
second whereas the probe flow on the instrument is 60cc/minute.
It is possible to test for the presence or absence of draughts during calibration by
turning off the peak hold function and observing the console display. Although the
display may not indicate the value of the standard leak because the instrument is
being calibrated, the reading on the display should be steady. Any marked
variations in the console display can indicate that a draught may be affecting the
calibration routine and steps should be taken to remedy the situation.
•
When calibrations are performed using standard gas mixtures, it is important to
ensure that the concentration of calibration mixture in the vessel from which the gas
is sampled is representative of the bulk calibration mixture. This may involve
extensive flushing of the vessel to ensure that this condition is met.
It is possible to check that the concentration of the gas in the vessel is
representative of the bulk calibration gas by performing sequential calibrations and
examining the calibration factor after each calibration and flushing the vessel
between the calibrations. Any decrease in the calibration factor calculated by the
instrument indicates that the concentration in the vessel is rising and it has not
been adequately purged. Vessel purging and calibration cycles should be
continued until the calibration factor reaches a constant value.
•
It has always been possible to perform calibrations in the concentration mode
(results displayed in ppm) using standard leaks (leak rate given in cc/sec).
Calculate the equivalent concentration for that leak rate by dividing the leak rate of
the standard leak in cc/sec by the inlet probe flow rate in cc/sec.
This procedure has been made easier by setting the probe flow to 60 cc/min or
1cc/sec. If the calculation outlined above is performed for a typical range of
Standard leaks, the following results for an instrument fitted with an H sinter are
obtained:
Standard Leak Rate / cc/sec Equivalent Concentration / ppm
1.0x10
-8
0.01
1.0x10
-7
0.10
1.0x10
-6
1.00
1.0x10
-5
10.0
The validity of calibrating the instrument for ppm measurements using standard
leaks has been demonstrated and this approach can avoid some of the pitfalls that
may trap the unwary if a standard gas mixture is used to perform ppm level
calibrations.
10.4
GENERAL TIPS ON LEAK DETECTION
The following general tips will prevent improper readings in the majority of applications:
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•
The operating configuration of the instrument should be chosen so that, so far as is
possible, the readings of greatest interest (usually around the pass/fail level of the
component under test) are in the middle of the configured operating range. This will
not be possible in all cases, especially if the maximum sensitivity is required from
the instrument, but it is good practise to try to operate the instrument in such a
manner as to allow measurements both above and below those of most interest to
be made.
The operational range of the instrument can be varied over wide limits by
appropriate choice of inlet configuration and trace gas concentration. Appendix A
gives a list of the operating ranges of the instrument with the various inlet
configurations at a range of trace gas concentrations.
By and large it is better to modify the operating range of the instrument by changing
the trace gas concentration rather than by changing the inlet. The H sinter is the
first choice inlet with the M and L sinters being second and third choices
respectively. Note that the L sinter, although offering the ability to detect high level
leaks, has a comparatively poor response and clear-down time and should only be
used with caution.
•
In some applications a total integrated leak rate is required from a component
under test. This type of test is performed when the pass/fail criterion is that the total
leak rate from all the potential leak sites in the component under test does exceed
a specified figure.
In outline, the component to be tested is placed inside a chamber that is purged
with clean air to remove any SF
6
background and is then sealed. The sealed
chamber is allowed to stand for a specified period of time to allow the concentration
of SF6 to build up in the space within the chamber surrounding the item under test.
The concentration of SF
6
in this space is measured using the Q200 and a
calculation may be performed to convert this concentration into leak rate units. If the
incubation time is kept constant, the pass/fail level can be defined in terms of
concentration units, rather than calculating the equivalent leak rate.
Although this is a commonly used technique, some care is required to ensure that
the test is carried out in a manner that will ensure that reliable results are obtained.
The majority of difficulties that are encountered when this technique is used are
related to background levels of SF
6
and the operator not taking the appropriate
steps to minimise their effects.
In order to minimise the time that is required to produce a measurable
concentration build up within the chamber, it is important to purge the chamber
efficiently to minimise any SF
6
background in the chamber prior to sealing the
chamber at the start of the test. The chamber background can result from a
significant SF
6
background in the ambient air or from SF6 left in the chamber from
the previous test. The air supply that is used for this purging phase must be clean. If
the air supply is derived from a compressor, it will be necessary to have oil and
water traps in the supply line. This will ensure that there are no contaminants
introduced into the test chamber that will have either an immediate or cumulative
deleterious effect on the performance of the Q200.
When a measurement of concentration is to be made, the way that the instrument is
zeroed prior to making the measurement must be considered. It is important that
the instrument is zeroed in an air sample that is representative of the composition of
the air that was used to purge the chamber at the start of the incubation time. This
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is the only way in which an accurate measurement of the increase in SF6
concentration within the chamber can be made.
Firstly, consider the situation where the instrument is zeroed in an environment with
an SF
6
background whose concentration is significant in comparison with the SF6
concentration in the test chamber as a result of the incubation of a leaking test
component. Having zeroed the instrument in a contaminated background, the
instrument will only display a concentration increase when the air in the chamber is
sampled if the SF
6
concentration in the chamber is higher than the SF6 background
in the air in which the instrument was zeroed. The displayed result will be the
difference in SF
6
concentration between the chamber air and the air used to zero
the instrument and will give a falsely low result.
Secondly, consider the situation where the instrument is zeroed in an environment
with an SF
6
background whose concentration is high in comparison with the SF6
concentration in the test chamber as a result of the incubation of a leaking test
component. Having zeroed the instrument in a highly contaminated background, the
instrument will display a zero result because the SF
6
concentration in the chamber
is lower than the SF6 concentration in which the instrument was zeroed. The actual
concentration difference would be negative which has no sensible physical meaning
in the context of the test.
Thirdly, consider the situation where the instrument is zeroed in an environment
with an SF
6
background whose concentration is negligible in comparison with the
SF
6
concentration in the test chamber as a result of the incubation of a leaking test
component. Having zeroed the instrument in a clean background, the instrument
will display a true result because the SF
6
concentration measured in the chamber
results from the leaking component only.
In order to meet the requirement to arrange a supply of clean air in which the
instrument can be zeroed, an approach similar to the clean air supply used when
checking the SF
6
background in a fixed installation can be used. The air supply
should be arranged to flow at a rate of a few tens of cc/second into a shroud that is
a loose fit over the inlet probe of the instrument. The empty barrel of a 50cc plastic
syringe makes a convenient, cheap and disposable shroud.
Having zeroed the instrument in clean air, the zero should not be touched again nor
should the instrument be returned to the 'Standby' mode until the measurement of
concentration build up within the chamber is complete. Setting the instrument to
'Standby' has the effect of cancelling the previous zero. A new zero point is found
after the stabilisation period when re-entering the 'Run' mode which would not
necessarily guarantee that the zero point would be that obtained when zeroing the
instrument in clean air.
Adopting this approach will ensure that the measurements obtained are reliable.
•
If the flexible probe is to be used to allow access to areas that are not accessible
with the hand unit, ensure that the instrument is calibrated with this probe fitted.
Note that the flexible probe can only be used with sinter inlets and that the
response and clear down times will be poor with an L sinter fitted. Do not change
probes when making measurements, as this will effect the quantitative response of
the instrument.
•
Leak testing should be carried out away from strong draughts and environments
with high moisture content.
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•
Whilst sampling, the instrument should not be subjected to explosive compounds,
high levels of organic solvent vapours, or large concentrations of the trace gas
being detected. This will have the effect of contaminating the detector, therefore
requiring a sustained period in clean mode.
•
Avoid hand contact with the probe when leak testing, as this will lead to improper
readings.
•
Always ensure that the surface to be leak tested is relatively clean, and free from
small deposits such as filings, etc.
•
Under no circumstances should the probe be immersed in any type of liquid.
•
Sampling should be performed with the probe a few millimetres above the surface
under test, to avoid picking up dirt, oil, grease etc.
•
The probe should be passed over the surface under test at a rate of not more than
25 mm/sec otherwise a small leak could be missed.
•
Avoid placing heavy or sharp objects on the service cable that links the console to
the hand unit.
•
Store the Q200 under dry ambient conditions away from vapours, solvents and
other volatile materials.
10.5
ADJUSTING THE VOLUME
The volume setting on the Q200 can be adjusted whilst in sample mode. If the user
presses either the or keys the new volume level will be displayed:
Volume Medium
This message will be displayed for a two-second period before reverting back to the
leak rate display. The volume levels are off, low, medium and high and should be set in
relation to the background noise level.
10.6
BACKGROUND CONTAMINATION
Ideally the instrument should be used in an environment that is free of any trace gas.
Due to the possible presence of leaks from the unit under test, and because of the
charging and discharging of components under test with trace gas there is likely to be
some background contamination that the instrument cannot distinguish from a real
leak.
In a relatively constant background, pressing the
key on the hand unit from time to
time will be adequate to zero out any steady background and detector drift. Where the
background contamination level is changing, however, the auto zero facility will give
better performance as it automatically tracks any slowly changing background.
Selection of the auto zero setting (slow, medium or fast) is best done by trial and error.
It is best to work with the slowest setting possible. When the fast setting is selected
care must be taken not to hold the probe close to a suspected leak for longer than a
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10-7
few seconds, since the instrument will start to see this as background and zero it out.
As a rough guide the time taken to reduce any change in background by 50% with the
auto zero on is shown in the following table:
Auto Zero Setting Time To 50% (Seconds)
Slow 40
Medium 15
Fast 5
10.7
RESULTS STORAGE AND PRINTOUT
The instrument can store up to 100 readings; these may then be printed to provide a
hard copy for quality control purposes. To store and print readings the following
procedure should be followed:
•
It is wise to clear the storage buffer if using the instrument for the first time or for a
specific purpose. To do this, enter sample mode and clear the storage buffer by
pressing
and keys simultaneously. If adding to any previous stored readings
ignore this step.
•
To store a result whilst measuring leaks press the key, the display will read:
If on pressing the
key more than 100 results have been stored the display will
show:
To clear the warning, press the
key. If the Storage Buffer Full message is
cancelled, the warning LED will stay lit and the user will not be able to store any
more readings until the buffer is cleared.
Result Stored
Warn: Storage Buffer
•
To print out the stored results connect a printer to the RS232 port (see Section 11
for more information), then press the
key. An example of the result's printout is
shown below:
Q200 Results
Gas : SF6
Trace gas % : 100%
Units : ml/s
Al : 1.0x10-6ml/s
Cal : 1.0x10-6ml/s
Probe Type : H Sinter
Display : Auto
Block 1
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10/11/1999 10:50 001 1.0x10-7ml/s Pass
10/11/1999 10:51 002 2.0x10-7ml/s Pass
10/11/1999 10:51 003 5.0x10-7ml/s Pass
10/11/1999 10:53 004 1.0x10-6ml/s Fail
10/11/1999 10:53 005 3.0x10-7ml/s Pass
10/11/1999 10:54 006 4.0x10-7ml/s Pass
10/11/1999 10:54 007 1.0x10-7ml/s Pass
10/11/1999 10:55 008 2.0x10-6ml/s Fail
10/11/1999 10:56 009 7.0x10-7ml/s Pass
10/11/1999 10:58 010 3.0x10-6ml/s Fail
10/11/1999 11:00 011 1.0x10-7ml/s Pass
10/11/1999 11:01 012 1.0x10-6ml/s Fail
Total 9.4x10-6ml/s
Pass 8 : 66.67%
Fail 4 : 33.33%
Total 12
It should be noted that if no alarm level were set, no pass/fail results would be
printed as shown below:
Q200 Results
Gas : SF6
Trace gas % : 100%
Units : ml/s
Al : Off
Cal : 1.0x10-6ml/s
Probe Type : H Sinter
Display : Auto
Block 1
10/11/1999 11:57 001 1.0x10-7ml/s
10/11/1999 11:59 002 1.0x10-6ml/s
10/11/1999 12:00 003 3.0x10-7ml/s
10/11/1999 12:03 004 4.0x10-6ml/s
10/11/1999 12:03 005 6.0x10-7ml/s
10/11/1999 12:04 006 2.0x10-6ml/s
Total 8.0x10-6ml/s
•
The parameter header is printed each time when either the trace gas %, alarm or
calibrate levels are changed in order to allow the operator to track any changes in
instrument settings that were made during the test.
•
Results are retained in memory even when the instrument is turned off.
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11.0 INTERFACING THE Q200
This section describes how the instrument can be connected to peripheral devices
such as printers or chart recorders.
11.1
INTERFACING TO A PRINTER
Stored leak rate measurements (see Section 10 for details) may be printed out for hard
copy and quality control purposes. A printer kit comprising a 40-column dot matrix
printer, all cables and spare paper is available from your supplier (see Appendix D for
ordering information). The printer is connected to the RS232 connector located on the
rear of the raised potion of the console unit using the cable provided. The pin-outs for
the RS232 connector are shown in Appendix E. The printer should be set up to match
the instrument's communication protocol:
•
9600 baud
• 1 start bit
•
8-bit data
•
1 stop bit
•
No parity
11.2
INTERFACING TO A CHART RECORDER
The instrument can be attached to an X-Y chart recorder, using the special analogue
output cable (see Appendix D for ordering information). The cable should be plugged in
to the RS232 connector, located on the rear of the raised portion of the console unit,
and connected to the chart recorder analogue input using the spade terminals.
A 0 - 2 volt analogue output is generated representing the instantaneous leak rate
being measured. It is scaled in the same way as the hand unit display so that the 50%
point (1 volt) represents the alarm or calibration level, and full scale (2 volts) represents
ten times this level.
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A-1
Appendix A Q200 S
PECIFICATION
This section gives a full specification for the Q200.
Detector
Miniature Electron Capture Detector.
Detects Any Electron capturing gas. The unit is
calibrated to display SF
6
.
Other freons and other halocarbons can be
configured to special order.
Resolution
Dependant on Configuration.
See Overleaf for Details.
Range Dependant on Configuration.
See Overleaf for Details.
Response Time
H Sinter
M Sinter
L Sinter
1 Second
2 Seconds
20 Seconds
Recovery Time
H Sinter
M Sinter
L Sinter
2 Seconds
4 Seconds
40 Seconds
Display Direct Digital display of leak rate in ml/s or
ppm.
Bar graph display relative to alarm level or
calibration level.
Alarm Audio and visual warning if the leak rate
sampled exceeds the set alarm level.
Calibration Direct customer calibration, using optional
standard leak.
Power Supply
AC mains supply 96-264V AC 50/60 Hz,
40VA. Instrument may only be run from
earthed mains supply.
12V DC rechargeable lead acid battery, gel
type giving 8 hours continuous use from full
charge. Note protection afforded with
T2A/250V inline fuse.
Gas Supply Refillable internal 600 cm
3
cylinder of Argon
of at least 99.998% purity, giving 20 hours
continuous use when charged to 150 bar.
Interfaces
RS232 serial interface.
0-2 Volts analogue output.
Memory Capacity of 100 test readings.
Dimensions
Case L430mm x B400mm x H230mm
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A-2
Weight
Hand unit 1Kg, console 12 Kg,
Shipping 15 Kg.
Operating Environment Temperature
5°C to 45°C.
Operating Ranges:
The instrument is factory configured to measure SF
6
and to display in either leak rate
or concentration measurement units. Response to other gases may be available to
special order. For conversion between different leak rate units and between leak rate
and concentration, refer to the formulae in Appendix J.
When the M or L Sinters or the Capillary probe are fitted, the ranges over which the
instrument may be calibrated are automatically changed to match the usable range of
the instrument.
The following tables indicate the leak rate and concentration measurement; Calibration
and Alarm ranges that are available for a range of specified Trace Gas concentrations.
Leak-Rate Measuring Ranges For 100% SF6 / ml/s
Probe Type Capillary H Sinter M Sinter L Sinter
Range 0.0 x 10
-10
⇓
1.8 x 10
-7
0.0 x 10
-8
⇓
1.8 x 10
-5
0.0 x 10
-7
⇓
1.8 x 10
-4
0.0 x 10
-6
⇓
1.8 x 10
-3
Calibration
Level
1.0 x 10
-10
⇓
1.8 x 10
-7
1.0 x 10
-8
⇓
1.8 x 10
-5
1.0 x 10
-7
⇓
1.8 x 10
-4
1.0 x 10
-6
⇓
1.8 x 10
-3
Alarm
Level
1.0 x 10
-10
⇓
1.8 x 10
-7
1.0 x 10
-8
⇓
1.8 x 10
-5
1.0 x 10
-7
⇓
1.8 x 10
-4
1.0 x 10
-6
⇓
1.8 x 10
-3
Config. Code 0001 0000 0002 0003
Concentration Measuring Ranges For 100% SF6 / ppm
Probe Type Capillary H Sinter M Sinter L Sinter
Range N/A 0.00
⇓
18.09
0.0
⇓
180.9
0
⇓
1809
Calibration
Level
N/A 0.01
⇓
18.00
0.1
⇓
180.0
1
⇓
1800
Alarm
Level
N/A 0.01
⇓
18.00
0.1
⇓
180.0
1
⇓
1800
Config. Code N/A 0100 0102 0103
Q200 User Manual
Q200 Specification
200120/Revision 10
A-3
Leak-Rate Measuring Ranges For 10% SF6 / ml/s
Probe Type Capillary H Sinter M Sinter L Sinter
Range 0.0 x 10
-9
⇓
1.8 x 10
-6
0.0 x 10
-7
⇓
1.8 x 10
-4
0.0 x 10
-6
⇓
1.8 x 10
-3
0.0 x 10
-5
⇓
1.8 x 10
-2
Calibration
Level
1.0 x 10
-10
⇓
1.8 x 10
-7
1.0 x 10
-8
⇓
1.8 x 10
-5
1.0 x 10
-7
⇓
1.8 x 10
-4
1.0 x 10
-6
⇓
1.8 x 10
-3
Alarm
Level
1.0 x 10
-9
⇓
1.8 x 10
-6
1.0 x 10
-7
⇓
1.8 x 10
-4
1.0 x 10
-6
⇓
1.8 x 10
-3
1.0 x 10
-5
⇓
1.8 x 10
-2
Config. Code 0001 0000 0002 0003
Leak-Rate Measuring Ranges For 1% SF6 / ml/s
Probe Type Capillary H Sinter M Sinter L Sinter
Range 0.0 x 10
-8
⇓
1.8 x 10
-5
0.0 x 10
-6
⇓
1.8 x 10
-3
0.0 x 10
-5
⇓
1.8 x 10
-2
0.0 x 10
-4
⇓
1.8 x 10
-1
Calibration
Level
1.0 x 10
-10
⇓
1.8 x 10
-7
1.0 x 10
-8
⇓
1.8 x 10
-5
1.0 x 10
-7
⇓
1.8 x 10
-4
1.0 x 10
-6
⇓
1.8 x 10
-3
Alarm
Level
1.0 x 10
-8
⇓
1.8 x 10
-5
1.0 x 10
-6
⇓
1.8 x 10
-3
1.0 x 10
-5
⇓
1.8 x 10
-2
1.0 x 10
-4
⇓
1.8 x 10
-1
Config. Code 0001 0000 0002 0003
Leak-Rate Measuring Ranges For 0.1% SF6 / ml/s
Probe Type Capillary H Sinter M Sinter L Sinter
Range 0.0 x 10
-7
⇓
1.8 x 10
-4
0.0 x 10
-5
⇓
1.8 x 10
-2
0.0 x 10
-4
⇓
1.8 x 10
-1
0.0 x 10
-3
⇓
1.8
Calibration
Level
1.0 x 10
-10
⇓
1.8 x 10
-7
1.0 x 10
-8
⇓
1.8 x 10
-5
1.0 x 10
-7
⇓
1.8 x 10
-4
1.0 x 10
-6
⇓
1.8 x 10
-3
Alarm
Level
1.0 x 10
-7
⇓
1.8 x 10
-4
1.0 x 10
-5
⇓
1.8 x 10
-2
1.0 x 10
-4
⇓
1.8 x 10
-1
1.0 x 10
-3
⇓
1.8
Config. Code 0001 0000 0002 0003
Preventative Maintenance
Q200 User Manual
200120/Revision 10
B-1
Appendix B P
REVENTATIVE MAINTENANCE
This section gives information on general preventative maintenance for the Q200. The
following points need to be checked periodically to maintain reliable performance and
safe operation.
B.1 C
ALIBRATION
The unit should be calibrated every time it is powered up after a suitable period to allow
the operation of the instrument to stabilise and at least once for every eight hours of
continuous use. Setting the re-calibration interval in the 'Calibrate' menu (see Section 8
for more information) will flag up a reminder when a re-calibration is due. The user
should keep a note of the calibration factor, as any large deviation between one
calibration and the next would suggest some change to the operating conditions of the
detector. Ensure when calibrating that the calibration standard being used is still within
the validity date noted on the label on the cylinder. In general, a standard leak has a
validity of twelve months after manufacture, after which the standard leak should be recalibrated. Your supplier can supply calibration standards or arrange for re-calibration.
B.2 B
ATTERY
Maintain the battery in a fully charged state whenever possible. Check the battery
voltage periodically using the 'Diagnostics' menu. Voltages below 12 volts indicate that
the battery should be left on charge overnight. From time to time remove the battery
and check for any cracks in the case and around the terminals. Spare batteries can be
obtained from your supplier (see Appendix D for more information). We recommend
that the inline T2A/250V fuse be replaced on a regular basis.
B.3 S
INTER
Check the sinter periodically looking for any accumulation of dirt on the outer surface; if
necessary replace the sinter following the procedure laid out in Appendix I. A high
detector background signal and erratic measurements could indicate that the sinter is
becoming contaminated. Spare sinters can be obtained from your supplier (see
Appendix D for more information).
B.4 D
ETECTOR CLEANING
When high leak rates are being measured or when in environments with high
background, the detector may become contaminated. Check the detector signal
(frequency) in a clean background by examining the frequency reading in the
'Diagnostics' menu. A frequency above 10 kHz may indicate that the detector is
becoming contaminated. If this is found to be the case, set a detector cleaning period
in the 'Configure' menu and perform a cleaning cycle (see Section 8 for more
information).
Pressing the
key in either program or run mode causes the detector temperature to
be increased to 110°C for the clean time entered. Leave the gas supply turned on. It is
recommended that the battery charger is connected and powered during Clean
otherwise the battery charge is quickly depleted. A warning message 'Warn: No
Charger' is displayed on the console display if cleaning is attempted without the
Spares/Options List
Q200 User Manual
200120/Revision 10
B-2
charger connected. Either press the key to override the warning and continue,
connect the battery charger and press the key to continue or press the key to
cancel the Clean.
As the Cleaning process progresses the current detector temperature and remaining
Clean time will be displayed alternately every ten seconds on the console. The hand
unit bar graph will show the current temperature in terms of a bar graph, with full scale
being equal to 100°C (all LED's on). Cleaning may be aborted by pressing the
key
or operating the key-switch. The detector will be cooled down to the normal operating
temperature of 50°C, a two-tone audio output will be issued and the instrument will be
ready for use, provided the alarm LED on the hand unit is not illuminated (see
Appendix C for more information). While cooling down, the instrument will display a
cooling message with the current detector temperature on the console. The hand unit
bar graph will display the current temperature in terms of a bar graph, above 100°C will
be equal to zero (all LED's off) and full scale will be equal 50°C (all LED's on).
B.5 P
ROBE
Remove the probe occasionally and check that it is not blocked. Spare probes may be
obtained from your supplier (see Appendix D for more information).
B.6 C
ABLE
Check the cable between the console and the hand units for any sign of wear and
damage, ensure that the cable is firmly retained at both ends.
B.7 G
AS SUPPLY
Ensure that there are no leaks from any pipe-work associated with an external gas
supply and there is adequate head pressure at the external gas supply (3 to 4 bar) to
maintain the gas flow. Always check the internal gas cylinder and that the cylinder is
still within its test period validity date (on the plastic disc on the neck of the cylinder)
before refilling. The cylinder must be returned to the supplier every five years to be retested. Spare gas cylinders may be obtained from your supplier (see Appendix D for
more information).
B.8 W
IPE TESTING
The detector may need to be wipe tested for leakage at regular intervals, depending
upon local regulations. In the UK, this should be done at least once every 24 months.
Consult your supplier who will be able to perform the wipe testing service.
B.9 B
ATTERY CHARGER
The battery charger requires no maintenance, however should the charger fail to
operate correctly the only maintenance that the user can perform is changing the mains
fuse by following this procedure:
•
Disconnect the unit from the mains supply.
Q200 User Manual
Preventative Maintenance
200120/Revision 10
B-3
•
Slide out the fuse drawer on the main's inlet socket and locate the two fuses.
•
Remove the fuse in the active position and replace with the spare fuse.
•
Refit the fuse drawer; connect the charger to the mains supply and re check.
If the unit still does not perform correctly, seek help from your supplier.
Do not attempt to remove the lid from the battery charger as this will result in
hazardous voltages being exposed.
Fault/Error/Warning Messages
Q200 User Manual
200120/Revision 10
C-1
Appendix C F
AULT/ERROR/WARNING MESSAGES
This section explains the possible faults, errors and warnings that can occur and
suggests corrective actions.
C.1 F
AULTS
All faults are non-recoverable, when they occur the warning LED is lit and an
appropriate fault message displayed. The instrument will then shut down and not
respond to any key press or action from the operator. With the exception of Battery and
Low Gas faults, faults that result in fault messages being displayed cannot be remedied
by the user and the instrument should be returned to the supplier for investigation and
rectification work to be carried out.
C.1.1 EPROM
FAULT
This fault will only occur at power up. The display will show:
Fault: EPROM
If this fault occurs consult your supplier.
C.1.2 M
EMORY FAULT
This fault will only occur at power up. The display will show:
FAULT: MEMORY
If this fault occurs consult your supplier.
C.1.3 B
ATTERY FAULT
If the battery voltage falls below 10.5 Volts the battery needs to be recharged or the
battery is near the end of its working life. The display will show:
Fault: Low Battery
If this fault occurs, recharge or replace the battery.
C.1.4 L
OW GAS FAULT
This fault will occur 1 hour after the first warning to check the gas (if the warning is
cancelled and is not remedied by replacing or re-filling the internal gas cylinder). This
fault will be disabled if the gas supply is set to external. The display will show:
Fault: Low Gas
If this fault occurs, replace or refill the gas cylinder.
C.1.5 S
YSTEM FAULT
Spares/Options List
Q200 User Manual
200120/Revision 10
C-2
If the 5-Volt rail falls below 4.65 Volts the system has become unusable. The display
will show:
Fault: System
If this fault occurs consult your supplier.
C.1.6 T
EMPERATURE FAULT
If the temperature of the system becomes unstable the system has become unusable.
The display will show:
Fault: Temperature
If this fault occurs contact your supplier.
C.1.7 H
EATER FAULT
If the detector temperature is increasing and the system exceeds 60°C in normal
sample mode or exceeds 120°C in clean mode the heater control circuit could be
faulty. The display will show:
Fault: Heater
If this fault occurs consult your supplier.
C.1.8 PRT
OPEN CIRCUIT FAULT
Note: The PRT is the temperature-measuring element in the detector assembly and is
an abbreviation for Platinum Resistance Thermometer.
If the PRT is detected to be open circuit the instrument has become unusable. The
display will show:
Fault: PRT O/C
If this fault occurs consult your supplier.
C.1.9 PRT
SHORT CIRCUIT FAULT
If the PRT is detected to be short circuit the instrument has become unusable. The
display will show:
Fault: PRT S/C
If this fault occurs consult your supplier.
Fault/Error/Warning Messages
Q200 User Manual
200120/Revision 10
C-3
C.2 E
RRORS
All errors either recover automatically after displaying the appropriate message for two
seconds or require a
key press to clear the error. Errors that require the key to be
pressed will light the warning LED and give a periodic audio signal.
C.2.1 C
ORRUPT CONFIGURATION CODE ERROR
This error only occurs on power up. The display will show:
Error: Config Code
If this error occurs switch off your instrument and contact your supplier.
C.2.2 P
ROGRAM PARAMETERS CORRUPT ERROR
This error only occurs on power up if any stored program parameters have been
corrupted. The display will show:
Error: Program
To clear this error, press the
key. The display will then show:
Reset Parameters No
Pressing the
or keys will scroll the response between yes and no. To clear the
parameters (the recommended course of action) set the response to yes and press the
key; the following message will be displayed for two seconds:
Parameters Cleared
To leave the parameters as they are (not recommended) set the response to no and
press the
key.
C.2.3 S
OFTWARE VERSION ERROR
This error will only occur on power up. When a new version of software has been
installed, the display will show:
Error: S/W Version
Pressing the
key will cause an audio warning to sound and the display will show the
following message:
Error: Program
Spares/Options List
Q200 User Manual
200120/Revision 10
C-4
To clear this error, press the key. The display will then show:
Reset Parameters No
Pressing the
or keys will scroll the response between yes and no. To clear the
parameters (the recommended course of action) set the response to yes and press the
key; the following message will be displayed for two seconds:
Parameters Cleared
To leave the parameters as they are (not recommended) set the response to no and
press the
key.
C.2.4 I
NVALID DATE ERROR
This error only occurs when setting the date. If an invalid date is entered e.g. 31/02/94
this message will be displayed for two seconds before returning to the date setting
parameters. The display will show:
Error: Invalid Date
C.2.5 I
NVALID CALIBRATION ERROR
If when performing a calibration, on pressing the key to accept a calibration, the new
calibration factor is less than 0.3 or greater than 3.0 this error message will be
displayed for two seconds. The display will show:
Error: Invalid Cal
Since an 'Invalid Cal' error leaves the calibration factor unchanged, it is possible to
continue leak checking. However, entering the sample mode from standby by pressing
the
key, the instrument will display a 'Warn: Not calibrated ' message to remind the
user that the instrument is being used in a manner where the results obtained may not
be reliable.
'Invalid Cal' errors can result from poor instrument performance caused by
contamination of the detector or sinter, a standard leak whose validity period has
expired or the standard leak not having been turned on.
C.2.6 N
O LEVELS SET ERROR
This error only occurs when entering sample mode. If the user tries to enter sample
mode without having set an alarm or a calibration level, this error message will be
displayed for two seconds. The display will show:
Error: No Levels Set
This message is displayed for two seconds whereupon the display will then show:
Fault/Error/Warning Messages
Q200 User Manual
200120/Revision 10
C-5
Warn: Not Calibrated
This warning may be cancelled by pressing the key after which the instrument will
return to the 'Standby' state.
C.3 W
ARNINGS
All warnings are recoverable, when a warning occurs the warning LED is lit, a periodic
audio tone generated and an appropriate warning message displayed. To cancel
warning messages press the
key. The warning LED will stay on until the warning
condition is cleared. All warnings function in this manner and can occur anywhere
unless stated otherwise.
C.3.1 N
OT CALIBRATED WARNING
This warning occurs when attempting to enter the sample mode from 'Standby' and
reminds the user that, although a calibration or alarm level has been set, a calibration
has not been performed. The display will show:
Warn: Not Calibrated
This warning message may be cancelled using the
key, whereupon the instrument
will enter the sample mode and allow leak rates or concentrations to be measured with
the calibration factor set to the default value of 1.000. This warning will recur every time
an attempt is made to enter the sample mode and the warning can always be
cancelled.
If, as a result of the warning, the key-switch is set to 'Program' and a calibration is
attempted and no calibration level has been set, the display will show:
No cal leakrate set
This message prompts the user to enter a leak rate for the standard leak to be used for
calibration in the 'Calibrate' menu prior to performing a calibration. The message
appears for two seconds before reverting to the 'Calibrate' message.
C.3.2 C
HECK DETECTOR WARNING
This warning can only occur in sample mode. This warning will occur when the
background frequency is above 20 kHz and an attempt is made to zero the display, this
may occur at power up when the frequency can rise as high as 130 kHz. The display
will show:
Warn: Check Detector
An intermittent audio warning will sound and the warning LED will be illuminated. The
warning may be cancelled by pressing the
key. However, the warning will recur
when the zero key is used again. No reliance should be placed on the results if the
instrument is operated in this manner.
The detector frequency can be examined in the 'Diagnostics' menu. The detector
frequency can be examined with the pump both off and on by the use of the
key.
If the detector frequency is high, for example >10kHz with the pump off (the default
state on entering the 'Diagnostics' menu), a contaminated detector or an argon supply
Spares/Options List
Q200 User Manual
200120/Revision 10
C-6
that contains excessive levels of oxygen or other electron capturing gases may be
suspected. Detector contamination is dealt with by entering a cleaning cycle. A
contaminated gas supply may result from incorrect filling of the internal cylinder,
allowing excessive levels of oxygen to enter the internal cylinder or a contaminated
supply cylinder used as an external gas supply or to fill the internal cylinder.
If the detector frequency is satisfactory with the pump off, for example <5kHz, but high
with the pump on, the inlet, either sinter or capillary should be removed and the seals
inspected for damage allowing air leaks into the detector with the pump on. In this case
the seal on the inlet probe should be changed. If the seal appears satisfactory, the inlet
may be contaminated and the instrument should be cleaned with the pump on by
entering the clean mode directly from the frequency display in the 'Diagnostics' menu
having set the pump to on in the frequency display in the 'Diagnostics' menu. If this
does not improve the detector frequency, the inlet, either sinter or capillary should be
changed. Appendix D contains details of the part numbers of the seals and inlets that
may be required.
C.3.3 N
O CHARGER WARNING
This warning is given when clean mode is entered with no battery charger connected.
The display will show:
Warn: No Charger
Performing a clean without a battery charger seriously depletes the battery life.
Pressing the
key again will cause the instrument to continue with the clean cycle
although the battery charger is not supplying power to the instrument. Pressing the
key will abort the clean.
C.3.4 N
O PRINTER WARNING
When the user presses the
key at various points if no printer is connected this
warning will be displayed. The display will show:
Warn: No Printer
Pressing the
key will cancel the warning.
C.3.5 C
HECK BATTERY WARNING
When the battery voltage falls below 11 Volts this warning is activated to indicate the
battery will either need replacing or recharging within a short period. The display will
show:
Warn: Check Battery
The recommended course of action would be to check the continuity of the inline fuse
in case a high resistance connection is present, recharge or replace the battery.
Fault/Error/Warning Messages
Q200 User Manual
200120/Revision 10
C-7
C.3.6 C
HECK GAS WARNING
The warning is activated when the pressure in the gas bottle falls below the pressure
setting of the pressure switch (10 bar). The display will show:
Warn: Check Gas
This warning is cleared when the bottle pressure goes back above 10 bar or the
key
is pressed. However, cancelling the warning without replacing or replenishing the argon
cylinder will produce a 'Low Gas' fault after 60 minutes. (See C.1.4)
This warning will not occur when running from an external gas supply.
C.3.7 S
TORAGE BUFFER FULL WARNING
This warning can only occur in sample mode when the user tries to store more than
100 readings. The display will show:
Warn: Storage Buffer
An intermittent audio warning will sound and the warning LED will be illuminated.
Pressing the
key will cancel the warning. The warning will recur if an attempt is
made to store another result.
At this point the operator can connect a printer to the serial port on the rear of the
console and press the
key to print all the results or press the and keys
together to clear the storage buffer. If the storage buffer is cleared the display will
show:
Storage Buffer Clear
C.3.8 C
ALIBRATION DUE WARNING
This warning occurs when re-calibration interval is exceeded. The display will show:
Warn: Cal Due
This error is cleared when the instrument is re-calibrated.
Q200 User Manual
Spares/Options List
200120/Revision 10
D-1
Appendix D S
PARES/OPTIONS LIST
A range of spares and options are available for use with the Q200, these are listed in
the following table along with their relevant order numbers. To obtain any item listed in
the table please contact your supplier and order quoting the relevant part number(s).
Spare/Option
Order Number
H Sinter. Range 10
-8
-10-5, 100% Trace Gas
200097
M Sinter. Range 10
-7
-10-4, 100% Trace Gas
200130
L Sinter. Range 10
-6
-10-3, 100% Trace Gas
200170
Sinter 'O' ring Seal. 2/674
Capillary Probe Kit. Range 10
-10
-10-7, 100% Trace Gas
200128
Capillary Probe Seals 'O' Ring
Needle Probe Disc Seal
2/671
37107
40 Column printer with RS232 printer cable.
200123
RS232 printer cable
200132
Printer Paper
7/3791
Battery charger and battery charger adapter.
200133
Spare battery assembly.
200076
Gas cylinder spanner.
7/3445 (European)
7/3446 (USA)
User manual (English).
200120
Full Gas cylinder (UK, 600ml)
200095
Battery charger fuse - T1A, 240V, 20mm.
3/273
Euro regulator blanking plug.
61158
American regulator blanking plug 61159
Analogue output cable
200124
Probe (standard)
200078
Probe (flexible)
Note that the flexible probe is used on Sinter inlets
only.
200085
Gas bottle filling jig (Euro)
99020
Q200 User Manual
Spares/Options List
200120/Revision 10
D-2
Gas bottle filling jig (American)
99030
Standard leak kit. (Leak rate to be specified).
10050
Inline battery fuse T2A/250V, 1¼"
3/291
Q200 User Manual
RS232 Connector Details
200120/Revision 10
E-1
Appendix E RS232 C
ONNECTOR DETAILS
This section details the pin-outs and connections for the RS232 connector that
provides both the serial output and the analogue output for connection to a printer and
chart recorder respectively.
Pin Signal name / function Direction of signal
1
2 RxD/Not used. 3 Txd/Transmitted data. From 200 to printer.
4
5
6 DSR/200 Ready From 200 to printer.
7 GND 8
9
10
11
12
13
14
15
16
17
18
19
20 DTR/Printer ready. From printer to 200.
21
22
23 Analogue ground. From 200 to Chart recorder.
24 Analogue output. From 200 to Chart recorder.
25
Q200 User Manual
Applications
200120/Revision 10
F-1
Appendix F A
PPLICATIONS
This section describes some of the typical application areas in which the Q200 is used.
•
Location of SF
6
leaks in high voltage electrical switchgear.
•
Fume cupboard and glove box checks.
•
Location of leaks in military components, e.g. missiles, mines and torpedoes.
•
Leak testing fire extinguishers.
•
Leak testing of hazardous material storage vessels.
•
General leak detection in any equipment that may be pressurised with SF6 and
where a high sensitivity, point leak detection technique is required.
Changing the Internal Gas Cylinder
Q200 User Manual
200120/Revision 10
G-1
Appendix G C
HANGING THE INTERNAL GAS CYLINDER
This section details the procedure for changing the internal gas cylinder on the Q200,
refer to Figure 5 for help:
•
Turn off Power and Gas and allow the pressure gauge on the regulator to fall to
zero.
•
Unlock the ¼ turn fasteners (3 positions), raise console cover and engage the
support arm located on the right hand inner edge of the console lid, accessible
when the console lid is raised.
•
Use gas cylinder spanner provided to unscrew cylinder connection.
•
Release the cylinder retaining straps and withdraw cylinder.
•
Fit new cylinder, ensuring that the replacement gas is of the correct purity and that
the PTFE sealing washer is in place on the regulator stem and is undamaged.
•
Refit the nut from the regulator stem onto the cylinder outlet and tighten the nut.
•
Refit cylinder retaining straps, lower console cover and lock the ¼ turn screws.
•
Turn on the gas and check gauge for correct pressure.
Cylinder retaining straps.
Gas cylinder.
Gas cylinder connection.
Figure 5: Changing the Internal Gas Cylinder
Installing/Changing the Battery
Q200 User Manual
200120/Revision 10
H-1
Appendix H I
NSTALLING/CHANGING THE BATTERY
This section details the procedure for installing and changing the battery on the Q200,
refer to Figure 6 for help.
Battery Connector.
200076
Battery Assembly.
Battery Mating Connector
Console cover support arm.
Inline Battery Fuse T2A/250V.
Figure 6: Changing the Battery
H.1 I
NSTALLING THE BATTERY AS SHIPPED
When the instrument is shipped to a customer the battery is disconnected to reconnect
the battery the procedure is as follows:
•
Turn off power.
•
Unlock the ¼ turn fasteners on the console cover (3 positions), raise console cover
and engage support arm.
•
Unlock battery cover ¼ turn fasteners (2 positions), and remove battery cover.
•
Locate the battery lead (red and black cables) and connect it to its mating
connector/lead (red and black cables) that is secured to the main cable. The
connectors are polarised, ensure that they are mated together in the correct
orientation.
•
Replace battery cover and lock ¼ turn fasteners.
•
Lower console cover and lock ¼ turn fasteners.
H.2 CHANGING THE BATTERY
To install a new battery the procedure is as follows:
Q200 User Manual
Changing The Probe/Sinter
H-2
200120/Revision 10
•
Turn off power.
•
Unlock ¼ turn fasteners (3 positions), raise console cover and engage support arm.
•
Unlock battery cover ¼ turn fasteners (2 positions), and remove battery cover.
• Locate the battery lead (red and black cables) and separate the connector that runs
into the main cable.
•
Lift battery assembly out of case.
•
Install new battery assembly in the console.
•
Locate the battery lead and connect it to its mating connector/lead that is secured
to the main cable. The connectors are polarised, ensure that they are mated
together in the correct orientation.
•
Replace battery cover and lock ¼ turn fasteners.
•
Lower console cover and lock ¼ turn fasteners.
•
Power up the instrument and inspect for correct voltage in the 'Diagnostics' menu.
Changing The Probe/Sinter
Q200 User Manual
200120/Revision 10
I-1
Appendix I C
HANGING THE PROBE/SINTER
This section details the procedure for changing the Q200's hand unit probe and sinter.
I.1 C
HANGING THE PROBE
To remove the probe (if attached): Take a firm hold and pull firmly away from the hand
unit nozzle. To replace the probe, engage it firmly into the aperture located at the front
of the hand unit nozzle. Refer to Figure 7 for help.
Push probe firmly into nozzle aperture.
Figure 7: Fitting the Probe
I.2 C
HANGING THE SINTER
The sinter is located on the front face of the detector assembly behind the hand unit
nozzle, illustrated in Figure 8. To change the instrument's sinter, the procedure is as
follows:
•
Turn off the power and gas supplies and allow the instrument to cool.
•
Unscrew the hand unit nozzle.
•
Remove the old sinter and discard.
•
Inspect the sinter port in the front of the detector assembly to ensure that there is
no particulate residue in the port. Any particulate matter in the port should be
removed using tweezers or some other mechanical means. Attempting to blow the
port clean may result in particulate matter either entering the detector cell or
blocking the ports to the detector cell which could result in erratic operation at best
or instrument failure requiring the instrument to be serviced at worst.
•
Examine the new sinter and ensure that it is clean and the o-ring seal is free from
damage.
Changing The Probe/Sinter
Q200 User Manual
I-2
200120/Revision 10
•
Carefully install the new sinter, tightening the sinter into the detector assembly
using a broad bladed screwdriver to ensure that the slot in the front of the sinter in
not damaged.
•
Replace the nozzle.
Figure 8: Location of Sinter
Warning
The detector body may be at an elevated temperature.
The instrument should be allowed to cool before changing the sinter.
Q200 User Manual
Leak Rate and Concentration Formulae
200120/Revision 10
J-1
Appendix J L
EAK RATE AND CONCENTRATION FORMULAE
Measurements of leak rates may be converted to different units or to a concentration
using the following formulae:
J.1 L
EAK RATE IN GRAMS PER YEAR (GM/YEAR
)
gm/year = (leak rate in ml per second * gas molecular weight * 31536000)/24500
where: gas molecular weight = 146 for SF6.
31536000 = Number of seconds in a year.
24500 = Molar gas volume at 298°K (room temperature).
J.2 L
EAK RATE IN OUNCES PER YEAR (OZ/YEAR
)
oz/year = leak rate in grams per year/28
Where: 28 grams = 1 ounce.
J.3 C
ONCENTRATION IN PARTS PER MILLION (PPM
)
ppm = leak rate in ml per second x10
6
Program Structure
Q200 User Manual
200120/Revision 10
K-1
Appendix K P
ROGRAM STRUCTURE
Standby
Sample
Calibrate
Clean Tim
e
Configur
e
Diagnostics
Se t D a te /T im e
Date
Time
Hours
Minute
s
Day
Month
Battery
Temperature
Frequency
Recal
Version
Reset Parameters
Al
Trace Gas %
Auto Zer
o
Displa
y
Gas Suppl
y
Cal
Recal Int
Cal Factor
Run Mode Program Mode
Year
Figure 9: Q200 Menu Structure
Q200 User Manual Glossary
200120/Revision 10
L-1
Appendix L G
LOSSARY
This glossary explains some of the terminology used in this manual.
Auto Relates to the way that a leak rate is displayed. In Auto mode
the leak rate is displayed as a mantissa plus variable
exponent.
Auto Zero Relates to a software algorithm that automatically 'tracks out'
background frequency drift, due to fluctuation in concentrations
of tracer gas in the leak testing environment.
Baud A unit of signalling speed. The number of discrete signal
events per second when communicating between the Q200
and an attached printer.
Bits Are binary units the number of which relates to the data length
of information sent from the instrument to a printer.
Cal Relates to the Calibration level on the Q200.
Calibrate Relates to the Calibration menu. A menu containing
parameters required to Calibrate the Q200. Calibration is a
sequence of actions whereby the instrument measures a
known standard leak and then calculates a multiplication
(calibration) factor that is applied to all future readings.
Cal Factor The calibration factor is the ratio by which the actual
measurement of leak rate obtained from a standard leak differs
from notional measurement of a leak of the same value that is
stored in the software. This factor will be applied to all
subsequent readings taken in sample mode. This factor
enables the instrument to accurately measure leaks using the
standard leak used during calibration as a reference.
Configure Relates to the Configuration menu. A menu containing
parameters required to Configure the Q200 for use.
Deg Abbreviation for degrees, the unit of temperature
measurement.
Diagnostics Relates to the Diagnostics menu. A menu containing
information essential to diagnosing possible faults.
Digital Relates to the method of displaying leak rates. In Digital mode
the Q200 uses the 20 character display to display type of
tracer gas being detected, actual leak rate and units of
measurement.
Error: Invalid Cal A message displayed when the Q200 cannot calibrate to a
standard leak. This occurs when the frequency response to a
standard leak differs sufficiently from that expected for the
calibration leak rate entered in the 'Calibrate' menu.
Q200 User Manual Index
L-2
200120/Revision 10
Fixed Exponent Relates to the way that a leak rate is displayed. In Fixed
Exponent mode the leak rate is displayed as a mantissa that
can exceed 9.9 plus a fixed exponent.
Offer Probe To Leak Prompts the user to insert the Q200 hand unit probe, to the
nozzle cone of a standard leak.
Parity Is a means of checking transmitted data.
Peak Hold
A hold function started by pressing the
key on the hand unit.
Once pressed the displays on the hand unit and console will
display the maximum signal level encountered since last time
the
key was pressed. With peak hold selected the audio
level still indicates the instantaneous signal level.
Recal Relates to the time remaining before re-calibration is due.
Recal Int Re-calibration interval. Relates to the period that the Q200 is
switched on between calibrations.
Units Units of measurement:
ml/s : milli litres per second (leak rate).
ppm : parts per million (concentration).
The following units are available by calculation:
gm/yr : grams per year (leak rate).
oz/yr : ounces per year (leak rate).
Zero
A function initiated by pressing the
key on the hand unit,
whereby the detector signal at that instant becomes the
reference from which all future measurements are taken.
Used to zero out the effects of background contamination.
Q200 User Manual Glossary
200120/Revision 10
i
Index
A
alarm....................2-1, 6-2, 6-3, 7-1, 8-1, 8-2, 8-4, 10-1, 10-8, 10-9, 11-1, A-1, B-2, C-5
applications .................................................................................................2-1, 10-4, F-1
argon..............................................................................................1-5, 2-1, 4-1, 4-3, A-1
auto zero ......................................................................................................8-5, 10-7, i, ii
B
bar graph......................................................................... 6-1, 6-2, 6-3, 7-2, 8-4, A-1, B-2
battery charger .................................. 1-5, 3-1, 3-2, 4-2, 4-3, 4-4, 5-2, B-2, B-3, C-6, C-7
C
calibrate...........................................................5-2, 8-1, 8-2, 8-3, 9-1, 9-2, 10-9, B-1, i, ii
calibrating.............................................................................................. 8-1, 8-2, 9-1, B-1
calibration factor............................................................................ 8-3, 9-1, 9-2, B-1, C-4
calibration level.............................................1-6, 6-2, 6-3, 8-2, 8-4, 9-1, 11-1, A-1, C-5, i
cancel ..........................................................................................................5-2, B-2, C-5
case......................................................................... 2-1, 3-1, 3-2, 4-1, 6-1, A-2, B-1, H-2
cautions.......................................................................................................................1-1
chart recorder.....................................................................................................11-1, E-1
clean........................................4-3, 5-1, 5-2, 8-8, 9-1, 10-6, B-1, B-2, C-2, C-6, C-7, C-8
clock ...........................................................................................................5-2, 8-9, 8-10
concentration............................................................................... iii, 8-4, 10-1, A-2, J-1, ii
contamination......................................................................... 8-3, 8-5, 10-1, 10-7, B-1, ii
cylinder............................................................ 1-5, 2-1, 3-1, 4-3, 4-4, A-1, B-2, C-2, G-1
D
date ...................................................................................... 5-2, 8-1, 8-9, 8-10, B-2, C-4
detector1-1, 2-1, 4-1, 4-3, 5-1, 5-2, 6-1, 7-2, 8-3, 8-8, 9-1, 10-1, 10-6, 10-7, A-1, B-1, B-
2, C-2, C-5, C-6, I-2, ii
diagnostics ..................................................................................8-1, 8-7, 8-8, B-1, H-2, i
digital........................................................................................................................A-1, i
display type ......................................................................................................................i
disposal.......................................................................................................................1-6
E
errors........................................................................................... 5-2, 7-1, 10-1, C-1, C-3
external gas supply .........................................................1-5, 4-3, 4-4, 7-1, 8-7, B-2, C-7
F
faults..................................................................................................................7-1, C-1, i
frequency........................................................................................ 8-5, 8-8, B-1, C-6, i, ii
front panel .....................................................................................................4-3, 5-1, 5-2
G
gas supply......................................... 1-5, 4-3, 4-4, 6-1, 7-1, 8-2, 8-7, A-1, B-2, C-1, C-7
general tips................................................................................................................10-4
H
hand unit... 1-1, 1-6, 2-1, 6-1, 6-2, 6-3, 7-1, 7-2, 8-2, 8-6, 8-8, 9-1, 9-2, 10-6, 10-7, 11-1,
A-2, B-2, I-1, ii
I
indicators..............................................................................................................6-1, 6-2
initialisation..................................................................................................7-1, 7-2, 10-1
installation ...................................................................................................................4-1
K
keyswitch...............................................................................3-1, 5-1, 7-2, 8-1, 8-11, B-2
L
leak detector................................................................................................................2-1
Index Q200 User Manual
ii
200120/Revision 10
leak rate............................. iii, 2-1, 6-2, 8-2, 8-4, 9-2, 10-1, 10-6, 11-1, A-1, A-2, J-1, i, ii
leakmeter 200ii, 1-1, 1-5, 2-1, 3-1, 4-1, 10-1, 10-6, 10-8, A-1, B-1, F-1, G-1, H-1, I-1, i, ii
M
maintenance ........................................................................................................B-1, B-3
membrane................................................................................................1-1, B-1, I-1, I-2
N
nozzle............................................................................................ 1-1, 9-1, 9-2, I-1, I-2, ii
O
options .........................................................................................................................3-2
P
peak hold.........................................................................................................6-2, 9-2, ii
power supply........................................................................................................1-5, A-1
print.................................................................................................. 5-2, 10-7, 10-8, C-8
printer.........................................................2-1, 5-2, 7-1, 8-9, 10-8, 11-1, C-7, C-8, E-1, i
printout.......................................................................................................................10-8
probe..............................................................iii, 1-6, 6-1, 9-1, 9-2, 10-6, 10-7, B-2, I-1, ii
R
re-calibration..................................................................................... 8-2, 8-8, B-1, C-8, ii
re-calibration interval.............................................................................8-2, 8-8, B-1, C-8
reset parameters..........................................................................................................6-2
S
sample.............................. 5-2, 6-1, 6-2, 8-3, 9-1, 10-1, 10-6, 10-7, C-2, C-5, C-6, C-7, i
sinter............................................................................................................................1-1
software version..........................................................................................................C-4
spares..........................................................................................................................3-2
standard leaks..............................................................................................................3-2
standby ................................................................................5-1, 5-2, 6-2, 7-2, 8-11, 10-1
storage........................................................................................ 1-1, 10-7, C-7, C-8, F-1
store................................................................................................. 6-2, 10-7, 10-8, C-7
T
temperature..............................................1-6, 5-2, 7-2, 8-3, 8-8, A-2, B-2, C-2, I-2, J-1, i
time............................................................... 5-2, 8-2, 8-3, 8-8, 8-9, 8-10, 8-11, A-1, B-2
trace gas...........................................2-1, 4-2, 8-2, 8-4, 8-8, 10-1, 10-6, 10-7, 10-8, 10-9
U
unpacking.....................................................................................................................3-1
V
volume ............................................................................................................... 5-2, 10-6
W
warnings.......................................................................................1-1, 7-1, 10-1, C-1, C-5
wipe testing................................................................................................................. B-2
Z
zero.......................................................................................................6-2, 8-5, 10-7, i, ii
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