biosystems EX CHEK Reference Manual Download

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Reference Manual

Ex Chek

NiMH Rechargeable Version

Combustible Gas Detector

651 South Main Street
Middletown, CT 06457
(800) 711-6776 (860) 344-1079
Fax (860) 344-1068
Part number 13-123 Version 2.2

Summary of Contents for EX CHEK

Page 1: ...0 Reference Manual Ex Chek NiMH Rechargeable Version Combustible Gas Detector 651 South Main Street Middletown CT 06457 800 711 6776 860 344 1079 Fax 860 344 1068 Part number 13 123 Version 2 2...

Page 2: ...1...

Page 3: ...IS REFERENCE MANUAL BE READ FULLY UNDERSTOOD AND FOLLOWED AVERTISSEMENT LIRE ATTENTIVEMENT LES INSTRUCTIONS AVANT DE METTRE EN MARCHE Ex Chek Reference Manual NiMH Version Biosystems Part Number 13 12...

Page 4: ...t 9 1 9 3 Weather cover 10 1 10 Ex Chek design components 10 1 11 Ex Chek accessories 10 Chapter 2 Basic operation 11 2 1 Overview of Ex Chek operation 11 2 1 1 Operational warnings and cautions 11 2...

Page 5: ...Chek Advanced Functions 24 5 1 Advanced features overview 24 5 2 Re setting the calibration gas concentration 24 5 3 Setting the security beep interval 24 Chapter 6 Trouble Shooting and Repair 25 6 1...

Page 6: ...C T4 for instruments powered using DEMKO approved alkaline batteries The Ex Chek is also CE Marked Conformit Europ enne The UL CSA and DEMKO classifications marks indicate compliance with United State...

Page 7: ...stored and the instrument is once again fit for use 6 Do not reset the calibration gas concentration setpoints in the Ex Chek unless the concentrations of your calibration gas differ from the concentr...

Page 8: ...6...

Page 9: ...h a range of zero to one hundred percent explosive The Ex Chek combustible gas sensor is non specific and responds to all combustible gases and vapors Combustible sensors contain two coils of fine wir...

Page 10: ...n off MODE button once at any time during normal operation causes the backlight to be activated for 10 seconds In the event of a gas alarm the backlight turns on automatically and remains on until the...

Page 11: ...ght and audible alarm are automatically evaluated and the battery is monitored continuously for proper voltage The Ex Chek offers the following additional options that allow the user to customize the...

Page 12: ...as control most other functions 6 Protective cap An o ring sealed cap and moisture barrier filter protect the sensor from damage 7 Sensor The top mounted sensor may be easily accessed for replacement...

Page 13: ...y can lead to inaccurate and potentially dangerous readings 5 A sensor that cannot be calibrated or is found to be out of tolerance must be replaced immediately An instrument that fails calibration ma...

Page 14: ...appear indicating the current peak alarm set point If the Ex Chek is operating in the Technician mode it will display the following factory installed default alarm set point P E A K A L R M 1 0 This...

Page 15: ...ve Pressing the MODE button once displays the peak reading of the gas being measured since the instrument was switched on E X 2 0 Pressing the MODE button again returns the display to the first screen...

Page 16: ...concentration test gas before the instrument is put back into service CAUTION To achieve optimal charge and ensure long battery life of the NIMH battery make sure that charging takes place in an area...

Page 17: ...l stay in alarm mode until the unit is shut off and an operational sensor is installed Chapter 3 Calibration The Ex Chek detector has been designed for easy calibration The on off MODE button is used...

Page 18: ...nsitivity is maintained over the life of the sensor 3 1 1 1 Effects of high concentrations of combustible gas on the combustible sensor The accuracy of combustible sensors may also be affected by expo...

Page 19: ...rument using the procedures discussed in Section 3 4 1 Slip on the calibration adapter as discussed in Section 3 4 2 and flow calibration gas to the sensor Wait for the readings to stabilize Forty fiv...

Page 20: ...l show the message WAIT ZERO while the adjustment is being completed W A I T Z E R O 6 After successful completion of the zero calibration the display will prompt you with the message SPAN MODE to con...

Page 21: ...s the concentration shown on the Span Adjust screen as the sensor is adjusted If the concentration does not match it will be necessary to assign a new calibration gas concentration as discussed in Cha...

Page 22: ...hat the operating mode is changed the LCD screen will briefly indicate the current operating mode 5 Turn the instrument off by pressing the MODE button for three full seconds 6 With the unit turned of...

Page 23: ...the LCD screen indicates that calibration is complete by showing the message DONE The Ex Chek will then turn itself off D O N E The Cal button must be held down until the screen indicates that span c...

Page 24: ...e Ex Chek are very conservative in order to maximize worker safety To enter the alarm adjust mode it is necessary to do the following 1 Turn the instrument on and make sure it is in Technician Mode Se...

Page 25: ...e It is possible to restore these default settings at any time by doing the following 1 Turn the instrument on and make sure it is in the Technician Mode See Section 2 2 4 2 Press the Alarm button on...

Page 26: ...tivity of the Ex Chek combustible sensor to 50 LEL Do not reset the calibration gas concentration unless you are using a calibration gas concentration that differs from the one that is normally suppli...

Page 27: ...hanged Chapter 6 Trouble Shooting and Repair 6 1 Replacing Ex Chek sensor The Ex Chek must be calibrated immediately following any sensor change Failure to calibrate the Ex Chek after a sensor change...

Page 28: ...w instrument to warm back up to room temperature Recharge the batteries and attempt to turn the instrument back on If the instrument still fails to turn on return to factory for repair 6 3 5 No audibl...

Page 29: ...g materials which similarly protect the instrument and accessories Note The return authorization number must be clearly marked on the outside of the box Prominently showing the return authorization nu...

Page 30: ...sted Calibration Gases Use of non standard calibration gas and or calibration kit components when calibrating the Ex Chek can lead to dangerously inaccurate readings and may void the standard Biosyste...

Page 31: ...Must Be Activated By date whichever comes first Mighty Tox 2 Mighty Tox 2 prorated credit is given towards repair or purchase of a new unit 0 6 months of use 100 credit 6 12 months of use 75 credit 12...

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