GMI PS1 Instruction Manual

USER HANDBOOK

Issue 7
23/05/2013
Part Number: 63183
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Copyright © Gas Measurement Instruments Ltd 2013

COPYRIGHT
i
COPYRIGHT
This User Handbook is copyright of Gas Measurement Instruments Ltd (GMI) and the information contained
within, is for use only with the PS1.
Reproduction, in whole or in part, including utilisation in machines capable of reproduction or retrieval without
written permission of GMI is prohibited. Reverse engineering is not permitted.
LIABILITY
Every care has been taken in the preparation of this document, but GMI do not accept any responsibility for errors
or omissions and their consequences. Information in this document is subject to change without notice. This
document does not constitute a specication or basis for a contract. Your statutory rights under law are not affected.
MODIFICATION NOTICES
GMI aim to notify customers of relevant changes in the product operation and maintain this manual up to date.
In view of the policy of continuous product improvement there may be operational differences between the latest
product and this manual.

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This Handbook is part of the PS1 product. Although every care is taken in the preparation of this Handbook it
does not constitute a specication for the instrument.
SOFTWARE
Software supplied for use in a particular product, may only be used in that product and may not be copied without
the written permission of GMI. Reproduction or disassembly of such embodied programmes or algorithms is
prohibited. Ownership of such software is not transferable and GMI does not warrant that the operation of the
software will be error free or that the software will meet the customer’s requirements.
DISPOSAL ADVICE
When no longer in use, dispose of the instrument carefully and with respect for the environment.
GMI will dispose of the instrument without charge if returned to the factory.

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SAFETY
• The instrument should be periodically tested, in a safe area, using a known gas concentration.
• Only GMI replacement parts should be used.
• If the instrument detects gas, follow your own organisation’s procedures and operational guidelines.
• PS1 instruments are certied as:
ATEX II 1 G Ex ia IIC T4 IECEx Ex ia IIC T4 Ga (Ta = -20oC to +50oC)
UL 913 Class I, Div 1 Groups A, B, C and D
MED, for oxygen instruments only. Refer to MED Declaration of Conformity for details
•This equipment is designed and manufactured to protect against other hazards as dened in paragraph
1.2.7 of Annex II of the ATEX Directive 94/9/EC
WARNING 1: DO NOT USE INSTRUMENT IN OXYGEN ENRICHED ATMOSPHERES.
WARNING 2: SUBSTITUTION OF COMPONENTS MAY IMPAIR INTRINSIC SAFETY.
WARNING 3: TO PREVENT IGNITION OF FLAMMABLE OR COMBUSTIBLE ATMOSPHERES,
DISCONNECT POWER BEFORE SERVICING.
Any right of claim relating to product liability or consequential damage to any third party against GMI is removed
if the warnings are not observed.

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AREAS OF USE
Do not use instrument in potentially hazardous atmospheres containing greater than 21% Oxygen. The enclosure
material is polycarbonate / ABS and must not be exposed to environments which are liable to result in mechanical
or thermal degradation or to damage caused by contact with aggressive substances. Additional protection may
be required in environments where the instrument enclosure is liable to damage.
STORAGE, HANDLING AND TRANSIT
The instrument is designed to handle harsh environments and to meet *IP67. If not subjected to misuse or
malicious damage, the instrument will provide several years of reliable service.
The instrument contains electrochemical sensors with a minimum life of two (2) years. The PS1 instrument should
only be stored for a maximum of one (1) month from the date of manufacture (as indicated on instrument batch
label). Storage in excess of this will affect the instrument warranty. The sensor contains potentially corrosive
liquid and care should be taken when handling or disposing of the sensor, particularly when a leak is suspected.
* Note: IP rating is not veried by UL.

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WARRANTY
The PS1 has a 2 year warranty against faulty goods or workmanship for the lifetime of the instrument. Consumable
and Mechanical parts are not included in this. These are covered under GMI standard warranty conditions.
For further details, please contact GMI.
The 2 year lifetime warranty is based on the following instrument use:
• Instrument switched on, for no more than 2 years
• Alarm duration, of no more than 1 minute per day
• IrDA communication, for no more than 2 minutes per day
Important: Signicant alarm and communication usage will reduce the lifetime of the instrument, i.e. the
instrument is unlikely to reach a lifetime of 2 years.

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vii
CONTENTS
COPYRIGHT .....................................................................................................................................................................................i
LIABILITY ..........................................................................................................................................................................................i
MODIFICATION NOTICES................................................................................................................................................................i
SOFTWARE .....................................................................................................................................................................................ii
DISPOSAL ADVICE .........................................................................................................................................................................ii
SAFETY........................................................................................................................................................................................... iii
AREAS OF USE..............................................................................................................................................................................iv
STORAGE, HANDLING AND TRANSIT.......................................................................................................................................... iv
WARRANTY .....................................................................................................................................................................................v
1. INTRODUCTION.................................................................................................................. 1-1
1.1 INSTRUMENT PART NUMBER / GAS TYPE ................................................................................................................ 1-2
1.2 INSTRUMENT FEATURES ............................................................................................................................................ 1-2
1.3 INSTRUMENT IDENTIFICATION................................................................................................................................... 1-3
1.4 INSTRUMENT DISPLAY ................................................................................................................................................ 1-3
1.5 CONSTRUCTION........................................................................................................................................................... 1-3

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2. OPERATION......................................................................................................................... 2-1
2.1 SWITCHING THE INSTRUMENT ON ............................................................................................................................ 2-2
2.2 NORMAL OPERATING DISPLAY................................................................................................................................... 2-6
2.2.1. Life Remaining...................................................................................................................................................... 2-6
2.2.2. Battery Low / Exhausted....................................................................................................................................... 2-6
2.3 SWITCHING DISPLAY BACKLIGHT ON........................................................................................................................ 2-7
2.4 VIEWING MAXIMUM / MINIMUM VALUES.................................................................................................................... 2-7
2.4.1. Clearing the Max / Min Values .............................................................................................................................. 2-8
2.5 REMOTE SAMPLING..................................................................................................................................................... 2-8
2.6 SWITCHING THE INSTRUMENT OFF .......................................................................................................................... 2-9
2.7 OPERATOR MESSAGES / FAULT FLAGS .................................................................................................................. 2-10
2.8 TEST..............................................................................................................................................................................2-11
3. ALARMS............................................................................................................................... 3-1
3.1 ALARM DISPLAY............................................................................................................................................................ 3-2
3.2 ACKNOWLEDGE ALARM(S).......................................................................................................................................... 3-4
3.3 MUTE ALARM(S)............................................................................................................................................................ 3-4

ix
CONTENTS
4. OPERATOR MAINTENANCE .............................................................................................. 4-1
4.1 CLEANING ...................................................................................................................................................................... 4-1
5. CALIBRATION...................................................................................................................... 5-1
5.1 CALIBRATION VALIDITY .............................................................................................................................................. 5-2
5.2 BUMP TEST .................................................................................................................................................................. 5-3
5.2.1 Automatic Bump Test ............................................................................................................................................ 5-3
5.2.2 Manual Bump Test ................................................................................................................................................ 5-4
6. ACCESSORIES.................................................................................................................... 6-1
7. ADDITIONAL INFORMATION .............................................................................................. 7-1
Training.................................................................................................................................................................................. 7-1
World Wide Web.................................................................................................................................................................... 7-1
A. TYPICAL OPERATING PARAMETERS............................................................................... A-1
INDEX.............................................................................................................................................i

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1-1
1. INTRODUCTION
The GMI PS1 instrument combines quality,
ruggedness and advanced technology in a user
friendly, portable gas detector. Small and lightweight,
it is suitably certied to recognised International
Standards.
The PS1 is a personal safety device that warns when
toxic gas or oxygen deciency exceeds the alarm set-
points. (Refer to Chapter 3 for factory set defaults).
Its high intensity audible, bright visual and vibrating
alarms provide early warning of dangerous gas
levels. It is the responsibility of the user to respond
properly to the alarms.
The instrument is operated via a single push button
providing the user with a simple to use gas detector. Fig. 1-1 PS1 Instrument

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1.1 INSTRUMENT PART NUMBER / GAS TYPE
62403 / 63324: 0 to 100 ppm Hydrogen Sulphide (H2S)
63002: 0 to 25% Oxygen (O2)
62404 / 63424: 0 to 500 ppm Carbon Monoxide (CO)
62405 / 63524: 0 to 20 ppm Sulphur Dioxide (SO2)
1.2 INSTRUMENT FEATURES
The main features of the PS1 range of instruments are:
• Integral impact resistant housing.
• Single button user operation.
• Clear display with screen light.
• High intensity audible and visual alarms. Also includes a vibrating alarm.
• Instrument protected to IP67 rating, making the instrument suitable for outdoor use.
• A comprehensive range of accessories including: Automatic Bump / Calibration Station.
• Alligator Clip.

1-3
INTRODUCTION
1.3 INSTRUMENT IDENTIFICATION
There are four PS1 gas models available. The model is clearly indentied on the front housing of the
instrument. The part number and corresponding gas type can be found in section 1.1 of this chapter.
1.4 INSTRUMENT DISPLAY
The PS1 display details the current gas readings and life remaining.
1.5 CONSTRUCTION
The PS1 instrument is housed in a tough, impact resistant moulded case. The instrument is sealed to IP67.
The instrument is designed with louver to protect against rain and to withstand physical impact testing.
The instrument has two buttons:
• The RH button is blue (with white print of standard ON symbol).
• The LH button is black.
A robust alligator clip is provided on the back face for attaching instrument to user’s clothing.

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1-4

2-1
2. OPERATION
Before operation of the PS1, check that the instrument is clean and in good condition.
Each time you use the PS1 instrument, perform the following operations:
1) Switch instrument ON in fresh air and check the life remaining.
2) Check there are no faults.
3) Attach optional accessories, as required.
4) Perform self-test by a press and hold of the black LH button.
5) Switch the instrument OFF, in fresh air, after use.
Note 1: You can leave the Instrument ON permanently if required. Switching OFF will reset the Max
(Min) value to 0 (20.9).
Note 2: A reset feature is available that allows a re-start of the instrument to overcome a stall in operation
(typically, this is indicated by an empty battery symbol). The instrument conguration is retained.
To reset the instrument, press and hold the RH button for 15 seconds, then press the ON button
to re-start the instrument and begin the warm-up routine as detailed in section 2.1.

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2.1 SWITCHING THE INSTRUMENT ON
Press and hold the RH button for one second to switch
the instrument on. The instrument begins its warm-up routine.
First, all display segments are briey shown, the LED’s will
ash, the buzzer beeps, and the vibrator will vibrate.
An example of an initial screen display is shown in Fig 2.1.
During the warm-up cycle, a countdown timer is displayed at
the bottom / centre of the screen.
Next, the software version is displayed, as shown in Fig. 2-2.
Fig. 2-1 Initial Screen Display
Fig. 2-2 Software Version

2-3
OPERATION
The next screen displays the target gas.
The target gas in the example shown, Fig. 2-3, is
Hydrogen Sulphide.
Fig. 2-3 Target Gas

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Next, the different alarm level
values are shown. See Figures
2-4 to 2-7.
Note 1: If any particular alarm is
disabled, the screen will
show ‘dis.’ (disabled).
The ‘L’ and ‘NL’ symbols, at the
bottom left hand and bottom right
hand corner of display, indicate
alarms as either ‘Latching’ or ‘Non-
Latching’ (default).
Refer to Chapter 3 ‘ALARMS’ for
explanation of Latching and Non-
Latching alarms.
Fig. 2-5 HiHi Alarm Level
Fig. 2-7 LTEL Alarm LevelFig. 2-6 STEL Alarm Level
Fig. 2-4 Hi Alarm Level