GAS Gasmaster Installation, Operation And Maintenance Manual Download Page 39

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4.3 Detector Calibration

Gas Alarm Systems recommends that you check

detectors routinely to ensure correct calibration and

operation.
Gas detectors require recalibration at least every 3 to 6

months. Fire detectors should be tested with the same

frequency. Site procedures may require more frequent

testing. See section 2.12 on page 14 for calibration

instructions.
For detailed instructions on the routine functional

testing of detectors, please refer to the relevant

Installation, Operating and Maintenance Instructions

provided with each detector.

4.4 Changing Batteries

During routine servicing, it is recommended that the

power be isolated from Gasmaster temporarily to

ensure that the back-up batteries are operational. Gas

Alarm Systems recommend that batteries are changed

every two years, and replaced as a pair.
Replacement batteries should be Yuasa UCEL Y1.2-12,

12 v 1.2 Ah C20 lead-acid type cells.
A 10 A fuse is fitted to the batteries, for replacement

part number see Spare Parts and Accessories section.

Batteries should be checked regularly on units

operating over 40ºC.

Warning
When replacing batteries, care should be taken to

ensure cables are re-fitted as shown on the battery

connection diagram. Incorrect fitment of battery

cables may result in a fire and/or harm to personnel.

4.5 Module Replacement

In the unlikely event of a Gasmaster component failure,

Gas Alarm Systems recommend that repair should

not be undertaken by anyone other than Gas Alarm

Systems approved personnel. Please contact Gas Alarm

Systems for details of your nearest service centre.

4.6 Event logging

Gasmaster records alarms, faults and display panel

button activities in an Event Log. A maximum of 300

events are logged, after which data is over-written on

a first-in-first-out basis. This function provides a record

of all system activities which can be uploaded using

Gasmaster PC software at any time. The event log is

held in RAM (volatile memory), so in the event of a

complete power failure all data will be lost.

4.7 Service card

A card is fitted to the inside of the front cover for

logging service activity. It is recommended that this

card be filled in with the dates of services, and details

of any parts replaced.

4.8 Cleaning

If required, the outside of the Gasmaster case can be

cleaned by gently wiping with a damp cloth using a

mild soap solution only.

4. Maintenance

Summary of Contents for Gasmaster

Page 1: ...1 to 4 channel gas detection control panel Gasmaster Installation Operation and Maintenance Manual ...

Page 2: ...re carrying out any maintenance or calibration work The equipment described in this manual may be connected to remote alarms and or shutdown systems Ensure that local operating procedures are adopted before carrying out any maintenance or calibration work This product has been tested and found to comply with the European Directive 2004 108 EC and the EMC requirements of EN50270 It also complies wi...

Page 3: ...nel 17 3 2 Gasmaster start up sequence 19 3 3 How to adjust display contrast 19 3 4 How to display Instrument serial number and system identity 19 3 5 Using the menu system 20 3 6 Inhibiting channels 20 3 7 Using the Control Panel in Supervisor Mode 21 3 8 In the event of an alarm 22 3 9 mV channels Pellistor saver mode 22 3 10 In the event of a fault 23 3 11 System Configuration 23 4 Maintenance ...

Page 4: ...lay see figure 3 2 page 18 and a de populated terminal PCB All operating functions are identical to Gasmater 4 Gasmaster is designed for simple operation and all day to day functions can be performed from the front panel Please refer to section 3 for details on display operation 1 2 About this manual The manual is divided into sections which detail procedures for installing operating and maintaini...

Page 5: ...s Gasmaster has been certified according to EN60079 25 2010 Explosive atmospheres Intrinsically safe electrical systems Certificate reference Baseefa05Y0090 1 Gasmaster must be installed in the safe area only but is certified for connection to Intrinsically Safe gas detectors installed in Zone 0 1 or 2 hazardous areas when connected by a safety barrier Installation must be in accordance with the i...

Page 6: ...ing up your Gasmaster system can be found in section III Operation Step by step instructions The installation and commissioning of your Gasmaster system is presented in easy to follow instructions A summary table of contents detailing a typical sequence of installation steps is shown below Depending on your configuration some or part of each step may be omitted Warning Gasmaster is not certified f...

Page 7: ... Two separate chassis support the display PCB and batteries which supports the display PCB and batteries The terminal PCB contains the input modules and all of the input and output terminals The display PCB is connected to the terminal PCB via a 50 way ribbon connector and is hinged on the left side so that it can be moved to provide access to the detector input terminals Most terminals are access...

Page 8: ...Gasmaster To access the mounting points first remove the front cover by unscrewing the fixings labelled in figure 2 1 Carefully remove the sounder connector from the display PCB The cover should be placed in a secure location It is recommended that Gasmaster is positioned by hand in the desired location and a pencil used to mark the mounting hole positions Gasmaster should be removed before drilli...

Page 9: ...tics specified above There are a number of suitable ways of terminating cables and glands to Gasmaster dependant on the cable and gland type Steel wire armoured SWA cable and glands with electrical termination of the armour to the enclosure via the gland Screened cable with the screen terminated inside the enclosure via a metal tag attached to the gland Screened cable using an EMC gland where the ...

Page 10: ...re configurations and link settings can be found in section 2 8 1 to 2 8 6 4 20 mA Inputs Gasmaster provides analogue 4 20 mA inputs with a sensor supply voltage of 19 to 28 V dc and measures the signal across a 98 Ω sense resistor Inputs can be gas detectors or flame detectors in 4 20 mA 2 wire sink or 3 wire sink or source configurations Gasmaster will track inputs from 3 to 21 5 mA at which poi...

Page 11: ... and Xgard Type 4 The procedure for setting up these detectors is different from 4 20mA devices refer to section 2 12 1 for detailed instructions on commissioning mV bridge type detectors Please contact Gas Alarm Systems for specific wiring details for Gas Alarm Systems detectors 2 8 1 Two wire 4 20mA devices Figure 2 6 shows a typical wiring configuration for a 2 wire current sink detector for sa...

Page 12: ...9 2 Installation ...

Page 13: ... cabled separately to the appropriate input channels on the Gasmaster or other control panel For connections details are shown on the instructions provided with the ESU 2 8 6 Flame detectors Figure 2 14 shows a typical wiring configuration for a 4 20 mA 3 wire Flame detector Set the detector type link appropriate for the type of flame detector refer to Figure 2 5 Do not set link to FIRE 2 8 7 Remo...

Page 14: ...iding up to 650mA which equates to two general purpose A V alarm devices using xenon type beacons A greater number of LED based beacons may be powered contact Gas Alarm Systems for advice Gasmaster is compatible with 12 V dc or 24 V dc A V alarms refer to Figure 2 16 for link settings Gasmaster is compatible with A V alarms which require a common 0V supply VE switched or a common VE DC supply 0V o...

Page 15: ...relay for that channel will activate If the sampling device stops the Alarm 2 relay will activate The Common Alarm relays will not activate if the sampling device slows or stops If the cable to the sampling device is open or short circuited the Common Fault relay will activate 2 9 4 Analogue outputs Gasmaster provides an analogue output for each channel which can be set as either 4 20 mA or 1 5 V ...

Page 16: ... Outputs are inhibited for a preset time after power up and the system will perform a start up sequence testing alarm indicators and the internal sounder If after a settling period faults are reported check the sensor connections again or refer to Faults menu on page 24 When power is applied the green Power LED will illuminate and flash every 5 seconds to indicate that the system is operational If...

Page 17: ...nterfaces with auxiliary equipment should also be verified The test and View menu s are provided for this purpose see page 24 on page 27 2 12 1 Commissioning mV pellistor detectors It is essential for these types of detectors that the correct head voltage and balance is set before attempting to zero and calibrate the sensor To set the head voltage measure the voltage across the and terminals at th...

Page 18: ...ean air is displayed ensure the detector has been correctly zeroed first i e 4 mA Press Continue to apply Zero now Gasmaster will display Pass when zero is successful or Fail if the detector zero is out of range 8 Use the Continue button to Zero other channels or Back button to the Supervisor menu to continue calibration Calibration 1 Follow points 1 to 3 above in Zero adjustment to enter Supervis...

Page 19: ... input and may have various alarm levels to indicate UV or IR activation please refer to the instructions supplied with the device for details Flame detectors require a UV or IR torch depending on detector type to simulate alarms Inhibit the relevant channel shine the torch at the detector and check that FIRE is shown on the Gasmaster display For 4 20 mA detectors also check that the appropriate a...

Page 20: ...sage display area In normal non alarm condition the message area displays the channel numbers and detector types e g CH4 refers to methane detector see following example The symbol represents the channel number i e 1 is channel 1 In the event of an alarm this message area will display the channels in alarm and their location See section 3 8 for more information on alarm conditions In the case of a...

Page 21: ...to respond to alarm conditions examine the status of system settings and configure Gasmaster ACCEPT RESET Press the Accept Reset button to mute the internal sounder and external alarms When alarm or fault conditions have cleared press Accept Reset again to reset the system Double click the Accept Reset button to exit the menu system and return to message display UP and DOWN Use the Up and Down but...

Page 22: ... 2 Gasmaster start up sequence At power up during Gasmaster installation or when Gasmaster is restarted Gasmaster will initialise the system by performing a self test The start up sequence is shown below 3 3 How to adjust display contrast To edit the display contrast press and hold the Up button to increase contrast and Down to decrease contrast The contrast level will be displayed The menu displa...

Page 23: ...process such as calibration A wizard menu will consist of selections user prompts and display status conditions during the process The Back button can be used to return to the previous screen or abort the wizard The Down and Up buttons are used to alter a selection The Continue button accepts the current selection and continues to the next step of the wizard Wizards are available for Zero and Cali...

Page 24: ...ntered the next character will start from the same point in the alpha numeric list To enter ZZZ use the Up and Down buttons to enter the first letter then simply press Down then Continue Down then Continue When you have selected the correct character press Continue the cursor will move to the next character position Continue entering the rest of the password When you have finished press the Contin...

Page 25: ... in alarm will display FIRE in the channel display There is only one level of alarm for fire channels Environmental sampling Units ESU ESU sampling devices that have slowed or stopped will display ESU Level 1 means slow level 2 means stopped To mute the sounder Press the Accept Reset button on the operator panel or remote Accept Reset switch if fitted The Alarm LED will stop flashing but remain li...

Page 26: ...out calibration and other confidence checks Your Gasmaster system can be configured using the Operator Panel and Menu System You will find details of the menu structure and configuration options over the next few pages refer to Figure 3 5 on page 25 for an overview of the menu structure To edit your systems configuration you must enter the Supervisor mode which is password protected to prevent mis...

Page 27: ...act us 5 Main supply fail Main supply has failed and the system is running on batteries 6 NVM hardware fail Fatal fault contact us 7 Loaded default settings System has returned to standard configuration settings Re configure using the Supervisor menu 8 Common relay fail Coil fault detected Contact us 9 10 11 Chan 1 relay fail Channel relay coil fault detected Contact us 12 to 19 ESU 1 stalled ESU ...

Page 28: ...25 Menu system overview ...

Page 29: ...33 Detector 1 input low Detector input signal is between 1 and 3 mA Only applies when the Interpret 2 mA command is set to Warning in the channel configuration 10 18 26 3 Detector 1 initiated inhibit A 2 mA inhibit signal has been received from a detector Only applies when the Interpret 2 mA command is set to Inhibit in the channel configuration 11 19 27 35 Chan 1 inhibited Input channel is in an ...

Page 30: ...opriate L1 Level 1 L2 Level 2 use the down key to view level 2 The values show the current state of each relay relays may be normally energised or de energised dependant on configuration No alarm means the relay is in its normal state In alarm means the relay is in its alarm state Output status Output 1 Values 0 0 to 25 5 mA 1 refers to the input channel use the Down button to scroll to channels 2...

Page 31: ...conds followed by Sounder level 1 output becomes active for 3 seconds followed by Sounder level 2 output becomes active for 3 seconds followed by Outputs de activate and display returns to the Audio Visual menu Control panel Control Panel Start test Test complete Press Continue to test LCD display LED s and internal sounder for 3 seconds Display returns to Control Panel menu Display contrast Displ...

Page 32: ...Result Values Pass Fail Use Down button to select the required channel to zero then follow wizard instructions Inhibit option will not be displayed if channels have already been set to inhibit using the menu shown above Reminds the user to check that the detector has been zeroed and is currently not seeing gas Channel has correctly zeroed Input signal was out of acceptable range re zero the detect...

Page 33: ...L1 Level 1 L2 Level 2 The values show the current state of each relay relays may be normally energised or de energised dependant on configuration No alarm or No fault means the relay is in its normal state In alarm or In fault means the relay is in its alarm or fault state Use the Up and Down buttons to change the relay state press Back to exit the relay will return to its normal state Channel 1 2...

Page 34: ...RS 485 communications parameters Gasmaster is factory set to 2 stop bit Allows a system name to be entered which will be shown on the Gasmaster display when the appropriate mode is selected see section 3 4 Use the Up and Down buttons to enter required alpha numeric characters and press Continue to accept Determines whether a main supply fail is treated as a fault or a warning Language Language Val...

Page 35: ... De energised Energised Determines the operation of the common alarm and fault relays L1 Level 1 L2 Level 2 Latched means that in an alarm state the relay will stay active when the Accept Reset button is pressed and will only reset when the alarm or fault has cleared and the Accept Reset button is pressed again Non latched means that the relay will stay active when the Accept Reset button is press...

Page 36: ...SU sampling device Detector name e g CH4 for methane O2 for oxygen FIRE for smoke heat detectors Optional Detector location or tag will be shown on the message display if an alarm occurs e g Boiler Room E g for an ESU channel For flammable channels Very low range toxic gas detectors General toxic gas detectors Oxygen or other high volume gases Flame or conventional smoke heat detectors Detector ra...

Page 37: ...relay will stay active when the Accept Reset button is pressed and will only reset when the alarm or fault has cleared and the Accept Reset key is pressed again Non latched means that the relay will stay active when the Accept Reset key is pressed but will reset automatically when the alarm has cleared Latch accept means that in an alarm condition the relay will reset when the Accept Reset button ...

Page 38: ...ly or all at once The inhibit option is available in the Supervisor menu see section 3 6 on page 20 and the Menu System Overview on page 25 in the Operation chapter for details of this function If it is necessary to permanently disable a channel enter Supervisor mode and set the relevant detector Type to Unused see page 33 The channel display will be no longer shown and the power supply will be re...

Page 39: ... Warning When replacing batteries care should be taken to ensure cables are re fitted as shown on the battery connection diagram Incorrect fitment of battery cables may result in a fire and or harm to personnel 4 5 Module Replacement In the unlikely event of a Gasmaster component failure Gas Alarm Systems recommend that repair should not be undertaken by anyone other than Gas Alarm Systems approve...

Page 40: ...an four input modules can be extended at a later date by fitting additional modules The input modules simply plug in it is not necessary to remove power from the system providing the channel is set as Unused prior to insertion Once the module has been added the channel can be configured as appropriate to the detector using the Supervisor menu 5 Adding an input module Important to avoid signal inte...

Page 41: ...ow alarm and High alarm per channel plus Common Low High and Fault DPCO contacts rated at 250 V ac 30 V dc 8 A non inductive load 5 A inductive load Audible visual alarm drive 12 V or 24 V dc 650 mA maximum drive 12 V or 24 V dc 650 mA maximum drive Analogue 4 20 mA current source max loop resistance 700 Ω or 1 5 V dc min load 50 KΩ 4 20 mA for each channel current source max loop resistance 700 Ω...

Page 42: ...5 Sounder assembly Complete with wiring loom M04683 Sounder seal M050067 Gasmaster 4 display label For front cover M050068 Gasmaster 1 display label For front cover C01929 Communications Kit Includes Gasmaster PC software connection lead and RS485 232 converter E07635 Communications port 3 pin connector for fitment to Gasmaster to enable interface with the Communications Kit Comes complete with wi...

Page 43: ...erals and upper case only single clicking or holding the Up button will advance forward through the available groups of characters A B C D X Y Z 0 1 2 7 8 9 A B C etc single clicking or holding the Down button will advance backwards through the available groups of characters Z Y X W C B A 9 8 7 2 1 0 Z Y X etc double clicking the Up button will jump forwards to the end of the current group then on...

Page 44: ...ries are excluded from this warranty Warranty Disclaimer Gas Alarm Systems accept no liability for consequential or indirect loss or damage howsoever arising including any loss or damage arising out of the use of the instrument and all liability in respect of any third party is expressly excluded This warranty does not cover the accuracy of the calibration of the unit or the cosmetic finish of the...

Page 45: ...Unit 4 Halfpenny Close Knaresborough North Yorkshire HG5 0TG Tel 01423 862240 Fax 01423 860239 Email sales gasalarmsystems co uk www gasalarmsystems co uk ...

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