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Extech Instruments CO80, Manual

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Extech Instruments CO80 Manual Download Page 24

  CO80    V3.1     04/06 

24 

5. Other 

Functions

 

 
5.1 

Taking Pressure Readings 

 

To conserve battery life, the pump automatically turns off when Display 4 
is selected under all conditions except when the CO room test feature is 
activated. 
 
For pressure readings under 10 mbar, the display has a resolution of two 
decimal places and for measurements over 10 mbar, the resolution is one 
decimal place. 

 

Depending on the probes connected and the options selected, there are 
various different pressure readings that can be taken using the CO80 
 

Summary of Contents for CO80

Page 1: ...CO80 Combustion Gas Analyzer ...

Page 2: ...robe Selection 14 4 Taking Combustion Readings 15 4 1 Summary Procedure 15 4 2 Switching On 15 4 3 Scale Selection 15 4 3 1 Fuel Selection 16 4 3 2 Temperature Selection 16 4 3 3 Printer PC Selection 17 4 3 4 Pressure Settings 17 4 5 Flue Readings 18 4 6 Reports 19 4 6 1 Saving a Report 19 4 6 2 Printing the Last Saved Report 20 4 6 3 Printing Any Saved Report 21 4 6 4 Deleting the Last Report 21 ...

Page 3: ...t Leak Detection 33 5 5 2 CO Room Test Mode 33 5 5 3 Printing the Last CO Report 35 5 5 4 Deleting the Last CO Report 35 5 5 5 To Print all CO reports 35 5 5 6 To Delete all CO Room Test Reports 36 5 6 Differential Temperature Measurement 36 5 6 1 Differential Thermometer Set up 36 5 7 Gas Leak Detection 38 6 Calibration and Service 39 7 Guarantee 39 Appendix A Specifications 40 1 Instrument 40 2 ...

Page 4: ...on there is a user selectable choice of fuels temperature and pressure measurements This manual will take you through the functions and operations of the CO80 that will give you many years of reliable service Please also contact our technical support team at 781 890 7440 x 200 or support extech com for additional information WARNING This instrument is not designed to be used in continuous operatio...

Page 5: ...lity This sensor option is fitted inside the instrument enabling the CO80 to detect flammable gas leaks Once the gas leak screen has been cleared in order to view other screens and measurements the thirty second purge period will be to be reactivated in order to perform other gas leak checks 2 2 2 Air Liquid Surface Probe See Appendix A for specification details Display 4 in Section 2 6 to see rea...

Page 6: ...CO80 V3 1 04 06 6 2 3 Front View Charger Socket Exhaust Cover Infrared Window Gas Pressure Inlet Ports Thermocouple Sockets Keypad LCD Display ...

Page 7: ...CO80 V3 1 04 06 7 2 4 Back View Exhaust Cover Infrared Window Gas Pressure Inlet Ports Thermocouple Sockets Barcode Label Calibration Label ...

Page 8: ... the pressure to ambient levels Activates the Tightness Test Turns the back light on off and records the pressure for the soundness test and the temperature in the pressure test Scrolls through up to 8 displays depending on options taken see 2 6 Logs and prints sets of readings or logs and downloads up to 50 sets of combustion analysis and 25 CO room test readings to a PC see 4 6 Displays the cloc...

Page 9: ... boiler Display 4 Displays the positive and negative pressure selected by connecting to the appropriate inlet Display 4 options also include a tightness test count up timer and logging of the temperature during pressure test dependent on mode and connections see Section 5 Display 2 Oxygen excess air and combustion efficiency all in use this screen to display how efficiently the boiler is working D...

Page 10: ...ith the difference between the two displayed in the middle Display 7 Provides information on the CO levels for the room test Pressing holding the Log starts the test and the display alternates between the elapsed time period in minutes and the maximum CO in ppm for that minute Display 5 This is displayed only when the leak sensor option has been specified It indicates approximate concentrations of...

Page 11: ...cone tubing can be connected by push fitting The use of these ports is also identified on the information label on the base of the instrument 2 8 Filter Water Trap Tubing to CO80 Screw Cap Filter Housing Top Filter Housing Tubing from Probe Inner Filter Direction of Sample Flow Displayed on Housing Pressure ve Pressure ve Gas Sample Port ...

Page 12: ...ion or sooner if there is clear indication of contamination Should the filters become soaked in water these can be reused if left to dry fully Filters must be used at all times failure to do so shall invalidate any warranty 2 9 Thermocouple Socket Type K WARNING There is only one correct way around to connect the thermocouple Forcing the connector into the socket the wrong way around may result in...

Page 13: ...t may be powered in 2 ways a By using the integral rechargeable Ni MH batteries Overnight charging using the BGS101 charger will give a minimum of 6 hours continuous use excluding leak detection option The unit does not have to be switched on to charge the batteries but if it is after 15 minutes the instrument will automatically switch off whilst charging continues b Direct from the mains using th...

Page 14: ... port and thermocouple socket as shown for combustion monitoring The sample probe assembly includes the inline filter see section 2 8 and this must be used in the vertical position The additional air surface and liquid temperature probe if used is connected into the thermocouple socket marked outlet flue at the base of the unit For pressure measurement the ports are to be connected using the suppl...

Page 15: ...lean ambient air Press and hold On Off to activate the unit The pump will be heard working and a countdown of 30 seconds will begin Purge will be displayed in the bottom left hand corner Ensure the gas exhaust outlet is not obstructed During this countdown the oxygen cell will be calibrated to ambient air conditions At the end of the countdown sequence the following will be displayed 4 3 Scale Sel...

Page 16: ...ugh the following 5 available fuels as follows Natural Gas LPG Light Oil Heavy Oil Fuel 1 Release the Scroll button when the fuel to be selected is displayed By default Fuel 1 is factory set for measurement when coal is used as the boiler fuel 4 3 2 Temperature Selection During the power up purge period the press and hold Light to display the current temperature scale setting Either C or F will be...

Page 17: ...button when the appropriate output mode to be selected is displayed MOST APPLICATIONS WILL USE THE PC MODE 4 3 4 Pressure Settings To review or alter the pressure scale during the power up purge period press and hold down the Pressure button which scrolls through the following 5 available fuels as follows bAR mbar PSI pounds per square inch nnG mm of water column inG inches of water column Release...

Page 18: ...nstrument 4 5 Flue Readings Cont The time the gas sample takes to pass over the gas sensors from the flue is approximately 10 seconds and a further period of time should be allowed for the readings to stabilise approximately an additional 5 seconds WARNING If the CO concentration exceeds a level of 2 000 ppm a continuous series of alarm beeps will be heard The probe should be immediately withdrawn...

Page 19: ...oom test reports When the memory is full and a new reading is taken the oldest report is overwritten By pressing the LOG button the following will be displayed in the bottom left hand corner of the screen 4 6 1 Saving a Report Keeping hold of the Log key for two seconds will save the last report once a beep is heard With Save flashing on the display press and hold down the Log button for approxima...

Page 20: ...for additional information in order for the printing to commence Note It is possible to review a report on the display by printing without linking to the printer or PC The printout has provision for writing in customer and appliance details The header can easily be configured to provide the name and contact details of the boiler service engineer see section 5 4 A typical set of readings is indicat...

Page 21: ...lete the last logged report press the Log key Pressing the Pressure key will show the last report saved and del will flash Keeping hold of the Log key for two seconds will delete the last report once a beep is heard Display 1 will now be displayed once the report has been deleted 4 6 5 Deleting All Reports Pressing Log then the Scroll key twice displays the screen ALL 50 Pressing Pressure now brin...

Page 22: ...essing the On Off key The close down routine purges unwanted flue gases from the instrument extending its operational life and prepares the instrument for the next set of measurements 4 7 2 Power Off In High CO Levels If the unit is turned OFF after the carbon monoxide sensor has been exposed to high levels of CO gas the display will show the following with the number 30 flashing Whilst this displ...

Page 23: ...the following two screens every second 4 7 3 Turning Off During CO Room Test Cont To turn the power off in this mode press the On Off button to return to the CO room test displays as shown below Pressing the Log key brings the Save Print Send menu at the bottom of the screen Press Scroll for Print to flash Press and hold Log to send the readings to an IR printer readings are automatically saved in...

Page 24: ...all conditions except when the CO room test feature is activated For pressure readings under 10 mbar the display has a resolution of two decimal places and for measurements over 10 mbar the resolution is one decimal place Depending on the probes connected and the options selected there are various different pressure readings that can be taken using the CO80 ...

Page 25: ...instrument is now ready to take pressure readings For gauge pressure connect one length of silicon tubing supplied to the Pressure port see 2 7 For differential pressure connect the two supplied lengths of silicon tubing to both the Pressure and Pressure ports The difference in the readings is displayed and logged if required To record the pressure press and hold Clock a counter will commence and ...

Page 26: ...y to calibrate the pressure to ambient conditions and connect the CO80 to the meter or appliance that requires pressure testing Press and hold the Clock key until the CO80 beeps the counter is now reset to 0 seconds and counting automatically starts in one second intervals P1 is displayed at the bottom of the screen This display shows 1 minute and 3 seconds since the start of the test which is com...

Page 27: ...gain to clear the alternating display of P1 and the dropped pressure reading A solid P2 is displayed at the bottom of the screen Press and hold Light for the second time to drop the second end of test pressure to the bottom The display will alternate between the P2 and the dropped pressure for this part of the test After 3 minutes and 6 seconds displayed as 306 3 minutes and 6 seconds the start an...

Page 28: ... on the right EXTECH INSTRUMENTS 781 890 7740 Combustion Appliance Test Report Customer Appliance Ref Tightness Test Log 27 Date 11 45 5 10 2002 P1 Start mbar 22 3 M2 Stop mbar 22 3 Time Period 2 01 5 1 2 Soundness Tightness Test Cont The time interval between the two readings is printed as minutes seconds The results are retained permanently in the logging memory until they are deleted or overwri...

Page 29: ... already been stored on the outlet setting see below To have both flow and return readings two thermocouples must be connected see section 2 9 To measure and store the outlet Flue temperature connect the thermocouple to the outlet port see section 2 9 Place the probe thermocouple at the required location and press Light until a beep is heard the current value reading is stored at the bottom of the...

Page 30: ...n efficiencies To confirm this whilst displaying efficiency see Display 2 hold down the Light key and either a G or N will appear in the first position on the efficiency line To change from gross to nett efficiency or vice versa hold down the Light key as above for 2 seconds beep sounds until the required parameter G or N is displayed Connect the thermocouple to the Outlet Flue connection select t...

Page 31: ...l fix the amended time and date and return the screen to Display 7 CO room test 5 4 Header Settings The header comprises of two lines each with 24 characters Line one holds characters 1 through to 24 line two holds characters 25 through to 48 Factory settings are as follows EXTECH INSTRUMENTS 781 890 7440 5 4 1 Changing the Header Characters To change the characters individually for example to the...

Page 32: ...ash Move down until the first digit of the year flashes and enter the code 7777 in the year field This notifies the CO80 that the security code is about to be entered The first time digit will now flash WARNING Once a security code has been entered it cannot be changed You will need to keep this code safe as the top line of the header cannot be changed without it If you forget or lose your securit...

Page 33: ...able to pin point areas of CO leakage as well as ambient room levels in accordance to the forthcoming British standard currently in draft form as BS7967 Code of Practice for Measurement of Carbon Monoxide and Carbon Dioxide in Buildings and from Gas Fired Appliances by use of Electronic Portable Combustion Gas Analysers 5 5 1 CO Spot Leak Detection Ensure that the unit is switched on whilst in out...

Page 34: ...nt refer to legislation and or appliance manufactures instructions After 30 minutes the CO80 emits a sound that indicates the required timing period has finished and the maximum CO value in ppm is recorded and displayed Note Pressing and holding Log anytime during the test will start a new report Warning The previous readings will not be stored to memory until it has been printed To print press Sc...

Page 35: ... CO Report To delete the last report or current report if a log is in progress whilst in the CO display screen press the Log key followed by the Scroll key so that the Save icon is flashing Press the Pressure key so del flashes on the bottom line To delete the last CO log press and hold the Log key whilst del is flashing To cancel the delete log request either press the Pressure key followed by Sc...

Page 36: ... the next logging function 5 6 Differential Temperature Measurement The CO80 allows for two thermocouples for differential measurement that is used for example to measure the heat loss between the flow and return pipes on a boiler refer to manufacturers instructions and or current legislation for the maximum permissible differences between the two 5 6 1 Differential Thermometer Set up Scroll throu...

Page 37: ...CO80 V3 1 04 06 37 To save record or print the differential measurements see Reports in 4 6 Outlet Flue Temperature Difference between Inlet Out Temperature Inlet Temperature ...

Page 38: ...an audible alarm is activated and the display reverts to the above right Connect a length of the silicon tubing provided as part of the package or the thermocouple combustion probe to the sample port see section 2 7 Place the end of the sample tube at the area of inspection Any increase in the density of leaked flammable gas beyond 20 ppm will increase the pitch of the crescendo alarm as well as m...

Page 39: ...an a trained Extech official service partner will invalidate any outstanding warranty 7 Guarantee Your new CO80 is guaranteed free from defects in materials and workmanship for a period of two years from date of purchase provided that The product has been used only for its intended purpose and not been subjected to damage by misuse or wilful or accidental damage The product must not have been tamp...

Page 40: ...forms to BS7927 Reports 50 combustion analysis 25 CO room test Options Protective rubber boot IR link to PC Windows 98 or higher 2 Probes Standard Efficiency Probe Insertion length 250mm 9 9 with adjustable depth gauge Maximum temperature 800 C 1472 F Construction Pistol grip with stainless steel shaft K type thermocouple Accuracy 1 C 0 3 of reading Hose length 2500mm 9 9 3 Options Air Surface Liq...

Page 41: ... 10 000 ppm CO alarm Level factory set 6 Draught Pressure Measurement Tightness Test Timer count up from 0 zero to 99 minutes 59 seconds for gas tightness test to comply with IGE UP 1B mbar Scale Range 100 mbar to 100 mbar Resolution 0 1 mbar 0 to 100 mbar 1 mbar 10 to 100 mbar Accuracy 0 5 of reading calibration at 50mbar equivelent to 2 5 mbar PSI Scale Range 1 4 PSI to 1 4 PSI Resolution 0 001 ...

Page 42: ...ent to 0 10 inWG mm Water Gauge Scale Range 1000 mmWG to 1000 mmWG Resolution 0 1 mmWG 0 to 100 mmWG 1 inWG 100 to 1000 mmWG Accuracy 0 5 of reading calibration at 500 mmWG equivelent to 2 5 mmWG Appendix B Header Character Set The following is the list of characters available to include in the printer header see 5 4 SP 0 A N 1 B O 2 C P 3 D Q 4 E R 5 F S 6 G T 7 H U 8 I V 9 J W K X L Y M Z Note S...

Page 43: ...diately and allow unit to run in clean air for 5 minutes Ratio reads rnG CO or CO2 reading is zero Unable to calculate Probe is not in the flue appliance not running Battery life shorter than expected Back light or leak detector has been used excessively Turn off back light when not required CAL shown on display Calibration required Contact Extech Prob displayed Instrument calibrated whilst probe ...

Page 44: ...eader Forgotten or lost security number Contact Extech Inaccurate pressure readings Instrument has been switched to pressure screen whilst connected to a pressure source Disconnect pressure tubing from instrument and re zero pressure to atmosphere see Section 5 1 Cannot turn instrument off High level of carbon monoxide still being detected by the sensor Allow unit to run in clean air until 30 seco...

Page 45: ...e most commonly used program is Hyperterminal which comes standard on any PC equipped with a Windows operating system Port settings must be set as follows to allow the CO80 to send data streams to the PC Bits Per Second 9600 Data Bits 8 Bits Parity None Stop Bits 1 Flow Control XON OFF Setting up a Hyperterminal Session Access Hyperterminal through the Start button on your control bar 1 Hypertermi...

Page 46: ...0 V3 1 04 06 46 3 Choose a name 4 Select your COM port This setup can be recalled for all future connections 6 Hang Up Call The PC is now ready to receive Transmissions from the CO80 5 Choose PORT settings ...

Page 47: ...icate with the Extech 77118I1 printer Open the paper roll compartment of the printer and locate the dip switch The switch will be in the bottom of the compartment next to the telephone jack For communication to be possible the settings must be as follows 1 2 3 4 5 6 7 8 See printer manual for more detailed information on the printer settings OFF ON ...

Page 48: ...operation outside of specification improper maintenance or repair or unauthorized modification Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct indirect incidental or consequential damages Extech s total liability is limited to repair or replacement of the product The warranty set forth above is inclusiv...

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