Related Manuals for Crowcon GASMAN II
Summary of Contents for Crowcon GASMAN II
- Page 1 GASMAN II PERSONAL SINGLE GAS MONITOR INSTRUCTION MANUAL ISSUE NO. 5 11/99 STOCK NO. M07-118...
- Page 2 Gasman II Instruction Manual Gasman II Flammable Rechargeable Batteries Upon receipt we recommend that Flammable instruments are fully charged for 16 hours prior to use. This product has been tested and found to comply with the European Directive 89/336/EEC WARNING: Substitution of components may impair Intrinsic Safety.
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Page 3: Table Of Contents
Contents Page 1. Quick Operating Guide 2. Unpacking 3. Introduction 4. Specification 4.1 Instrument Settings 4.2 Battery Lifetime 4.3 General Assembly 5. Operation 5.1 Switch-on sequence 5.2 Display Symbol Guide 6. Batteries 6.1 Recharging 6.2 Changing the batteries 6.3 Charger Supplies 7. -
Page 4: Quick Operating Guide
Gasman II Instruction Manual 1. Quick Operating Guide Switch on: Press large button; alarm test and LCD test occurs, followed by battery level display. Normal condition: Gas level displayed on LCD*. Intermittent ‘confidence’ signal (if selected). Alarm condition: Fast flashing red LEDs and sounder. -
Page 5: Introduction
See ‘Switch on Sequence’ (Section 5.1) for details of the battery level indicator. 3. Introduction The Crowcon Gasman II is a personal gas detector which can continuously monitor the level of oxygen or the presence of a single toxic or flammable gas. -
Page 6: Specification
Gasman II Instruction Manual hydride batteries which have a life of 10-12 hours* and up to 1000 charge/discharge cycles. * depending on alarm incidence. 4. Specification Weight 210g (7.4oz) Dimensions 130h X 60w X 30d mm (5.1h X 2.4w X 1.2d inches) - Page 7 Audible alarms Programmable from five different tones, 85dBA at 1 metre. (92dBA at 1 ft). Intermittent blip for discharged battery. Selectable ‘confidence’ blip. Fault warning. Display Custom 7 segment high contrast LCD giving gas reading. Symbols for low battery, peak hold, zero mode, cal mode and alarm annunciation.
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Page 8: Instrument Settings
Gasman II Instruction Manual (USA & Canada) Class 1, Division 1, Groups A B,C & D. Standards EN50014, EN50020, (Europe) EN50018 (USA & Canada) UL913 RF Immunity Tested to IEC801-3 and meets EN50082-2 RF Radiation Tested to EN55022 Class B... -
Page 9: Battery Lifetime
4.2 Battery Lifetime • Rechargeable flammable instruments’ batteries last 12 hours on a full charge. • Non-rechargeable flammable instruments using alkaline batteries last 24 hours. • Toxic and Oxygen instruments last 1 year using alkaline batteries, under normal usage conditions. Issue 5 Page 9 11/99... -
Page 10: General Assembly
Gasman II Instruction Manual 4.3 General Assembly Key: Gas Sensor Fixing screw/charging contact Small button Calibration adjuster cover Alarm LED lens Alarm sounder Top moulding Gas legend Display window Large button Base moulding Universal clip Certification labels Issue 5 Page 10... -
Page 11: Operation
5. Operation 5.1 Switch-on Sequence Make sure you are in clean air, then switch on the instrument by pressing the large button. The instrument tests all LCD segments, red alarm LEDs and sounder for 5 seconds, then displays the battery condition for 5 seconds before entering monitoring mode. -
Page 12: Display Symbol Guide
Gasman II Instruction Manual NOTE: It is possible that the instrument may display an alarm condition upon entering the monitoring mode (indicated by a flashing alarm symbol). This is due to the sensor taking time to settle after switch on. It is NOT a fault. Press the large button to cancel the alarm after a few seconds. - Page 13 Peak hold Indicates that the reading displayed is the highest level recorded since the instrument was switched on or reset. For oxygen, Peak Hold records the lowest value encountered. Peak Hold values can be toggled on and off by pressing the small button when the unit is on.
- Page 14 Gasman II Instruction Manual Alarm 2 When the second alarm level is reached, this symbol will flash and the visual and audible alarms will be activated. See Section 7, Alarm types. 15 Minute TWA Alarm (STEL) Toxic versions have TWA alarms in addition to the two levels of instantaneous alarm.
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Page 15: Batteries
6. Batteries WARNING - Battery charging or replacement should only take place in a SAFE AREA, i.e. no explosive risk. WARNING - to ensure Intrinsic Safety, the charger must only be used with DC supplies as specified in Section 6.3. 6.1 Recharging Flammable gas versions are normally supplied with re- chargeable batteries, though a non-rechargeable type... -
Page 16: Changing The Batteries
Gasman II Instruction Manual 6.2 Changing the batteries Toxic gas and oxygen versions are supplied with alkaline batteries which should power the instrument for a year. • Disassemble in a clean, dry environment and observe anti-static handling precautions. • Remove side fixing screws •... - Page 17 be adjusted from the instrument keypad (see Section 8) by means of a screwdriver. Alarm thresholds may also be set via the computer interface (see Section 12) and the following parameters may be set for instantaneous alarms: • Normally triggered on a rising level, alarms may be set to trigger on a falling level as with oxygen deficiency alarms.
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Page 18: Keypad Adjustments
Gasman II Instruction Manual manually reset. The 15 minute TWA alarm will self clear when the average exposure over the previous 15 minutes falls below the set threshold. The 8 hour TWA alarm will self clear when the average exposure over the previous 8 hours falls below the set threshold. -
Page 19: Adjusting Settings
is being applied to the sensor, the display should read zero, or 20.9 for oxygen. • Release small button then press and hold again to view Alarm 1. The symbol appears and the Alarm 1 level is displayed. • Release small button then press and hold again to view Alarm 2. -
Page 20: Zeroing
Gasman II Instruction Manual adjusted by rotating the screwdriver. • Only one potentiometer covers all functions - adjustments are stored by the instrument. • Potentiometer is only active while small button is held down. • If the potentiometer is turned to one of its end stops, the reading continues to advance in the relevant direction until backed off. -
Page 21: Accessories
Gas connection for calibration requires the use of the Calibration Adaptor (Section 9.1). The sample tube should be connected to a gas bag filled with calibration gas. Use the hand bulb to draw the gas over the sensor. If using a cylinder of calibration gas, connect it via a pressure regulator and flowmeter to the adaptor inlet. -
Page 22: Rubber Boot
This is a protective cover for use in the most arduous environments. It can remain in place for battery charging. 10. Routine checking & Maintenance Gasman II is designed to operate with little maintenance under most conditions. The following routine maintenance is recommended. WARNING - Substitution of components may impair intrinsic safety. -
Page 23: Zero & Calibration
10.3 Zero and Calibration Because all gas sensors change their performance characteristics over time, the following checks are recommended: • Zero Every 1 month • Gas response* Every 1 month • Calibration Every 6 months Instructions on how to make zero and calibration adjustments from the instrument keypad are in Section 8. -
Page 24: Troubleshooting Guide
Gasman II Instruction Manual On toxic and oxygen instruments, it is practical to replace the alkaline batteries at the same time (Section 6.2). • Disassemble in a clean, dry environment and observe anti-static handling precautions. • Switch off instrument •... -
Page 25: Error Codes
them by using the hidden button at the back of the charger, then reset the instrument by removing and re-inserting a battery. (If rechargeable batteries are left uncharged for many weeks, they gradually self-discharge until the normal charging methods do not work). 11.1 Error codes The instrument may display the following warning codes:... -
Page 26: Datalogging And Datacomms
The instrument will raise an audible alarm in the event of a fault. 12. Datalogging and Datacommunications Gasman II has an integral datalogging feature which takes regular readings and stores them in memory. When the memory is full, oldest data is overwritten so the instrument will always contain the most recently accumulated data. -
Page 27: Hardware Interface
The instrument should be switched on if it is to be zeroed or calibrated. 13. Sensor Limitations Gasman II uses a catalytic flammable gas sensor which operates in the presence of oxygen. Prior to entering a confined space, it is advisable to check oxygen concentration in addition to combustible gas concentration. -
Page 28: Accessories And Spare Parts
(e.g. hydrogen sulphide) damage may occur to metal components. Sensors may be cross sensitive to other gases. If unsure, contact Crowcon or your local agent. Use of high power radio transmitters in close proximity to the instrument may exceed rated RFI immunity levels and cause erroneous indications. -
Page 29: Spare Parts List
C01647 Multi-charger ribbon cable C01327 Comms lead C01315 SetPortable software 3 1/2” diskette C01296 Vehicle charging lead C01394 Shoulder strap C01451 Waist belt C01614 Aspirator complete with flow adaptor, tubing, bulb & pouch C01097 Aspirator probe C01511 Alarm earphone with 1.5m of tubing C01552 Autocalibrator II (requires PC &... - Page 30 Gasman II Instruction Manual SERVICE RECORD Ser.No: Location: Date Cal. Zero Span Comments Date Issue 5 Page 30 11/99...
- Page 31 Crowcon may also be relied upon for : • Portable multi-gas monitors for simultaneous detection of up to four gases. • Fixed equipment for continuous plant monitoring. • Calibration and repair at our instrument workshops. • On site service and maintenance.
- Page 32 Gasman II Instruction Manual Crowcon Detection Instruments Ltd 2 Blacklands Way Abingdon Business Park Abingdon, Oxfordshire OX14 1DY, England Tel: +44 (0) 1235 553057 Fax:+44 (0) 1235 553062 email: sales@crowcon.com http://www.crowcon.com...
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