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Innova 1312 Manual

Photoacoustic multi-gas monitor
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1312 Photoacoustic Multi-gas Monitor
May 1997
BE 6002−11
1312 Photoacoustic Multi-gas Monitor
INNOVA
Instruction Manual

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Summary of Contents for Innova 1312

  • Page 1 1312 Photoacoustic Multi-gas Monitor May 1997 BE 6002−11 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...

  • Page 2: Safety Considerations

    Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use, and is supplied in a safe condition. To ensure safe operation and retain the 1312 in a safe condition, note the following: EXPLOSION HAZARD! TO AVOID THE POSSIBILITY OF AN EXPLOSION, MONITORING OF FLAMMABLE GASES IN EXPLOSIVE CONCENTRATIONS MUST NEVER BE ATTEMPTED.
  • Page 3 Safety Considerations APPLYING POWER Before using the 1312, check that it is set to match the available mains voltage and that the correct fuses are installed. SAFETY SYMBOLS The apparatus will be marked with this symbol when it is important that the user refers to the associated warning statements given in the User Guide.
  • Page 4 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 5 Chapter 1 Using this Manual 1−1 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...

  • Page 6: Displaying Information

    However, in many cases, the icons in the tool-bar can be used to speed things up. The text below provides the key to the icons. Create a new measurement task Open an existing measurement task Copy active window to clipboard 1−2 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 7 Presentation only – Scroll forwards through the measurement task Presentation only – Go to the end of the measurement task Open the Cursor values dialogue Online only – Open the Alarm status dialogue 1−3 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 8 Chapter 1−Using this Manual Tool-bar Icons in 1312PC Software 1−4 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 9 Chapter 2 Preliminary Tasks 2−1 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...

  • Page 10: Chapter 2−Preliminary Tasks

    Chapter 2−Preliminary Tasks Installing the 1312PC Software When taking delivery of the 1312 Photoacoustic Multi-gas Monitor, five very impor- tant and necessary preliminary tasks must be completed before starting to operate Install the 1312PC Software Connect the Monitor to a PC.
  • Page 11 2.2.1 Fitting the RS–232 Cable 1. Ensure that both the 1312 and the PC are switched off at the mains. Failure to do so may result in your equipment being damaged. 2. Locate the serial port at the back of the PC, refer to your PC manual if in doubt.
  • Page 12 Checking/changing the Fuses in the 1312 The voltage-rating of the mains power supply determines the rating of the fuses that need to be installed in the 1312 before it is used. This is done as follows: 1.Insert a small screwdriver under the top The “AC Mains”...

  • Page 13: Setting The Communication Parameters

    Fig.2.3 4. Flip the top plate back and “click” it into position by pressing it gently against the back panel of the 1312. Setting the Communication Parameters The 1312PC software and the monitor communicate using the RS – 232 interface. In order for the communication to be successful, it is essential that the communication parameters in the two instruments are set correctly.
  • Page 14 3. Press to select 1 STOP BIT. 4. Press to select 7 DATA BITS. to select an EVEN PARITY. 5. Press 6. Press to select LEASED-LINE. 7. Press to select HARD-WIRED HANDSHAKE. 2−6 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 15 With the PC and the monitor already connected, as described in section 2.2: Press SET-UP 2.5.4 Checking/Changing the Data Log and Error Log Options With the PC and the monitor already connected, as described in section 2.2: SET-UP Press 2−7 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 16 Chapter 2−Preliminary Tasks Setting the Communication Parameters 2−8 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 17 Chapter 3 Philosophy of Operation 3−1 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...

  • Page 18: Chapter 3−Philosophy Of Operation

    When Offline operation is required, the Online instructions in this manual should be followed. If there is a deviation from these instructions, this will be indicated in the relevant sections. 3−2 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 19 Chapter 4 Introduction to and Familiarization with the 1312 4−1 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...

  • Page 20: Special Terminology

    “Measurement cycle” is the term used to describe everything that takes place in the 1312 from the time the pump starts to flush out the “old” gas sample in its analysis cell, until the signal in the measurement chamber has been measured using the last relevant optical filter.

  • Page 21: Sampling Interval

    The sampling interval is a measure of the time between the start of one measure- ment cycle and the start of the following measurement cycle. When the 1312 is not sampling continuously the sampling interval has to be de- fined by the user and is a fixed period of time (see Fig.4.1).

  • Page 22: Continuous Sampling

    The monitoring period can either be pre-set by the user — in which case the 1312 automatically stops monitoring after the monitoring period is over — or, not pre-set —...

  • Page 23: Setting The Internal Clock

    Familiarization with the 1312 using 1312PC Software Warning! Before you start to use the 1312 Photoacoustic Multi-gas Monitor it is very important that: the “Mains Voltage Selector” on the back panel of the 1312 is adjusted...

  • Page 24: Setting Units

    4.3.2 Setting Units All data in the 1312 is stored as raw data. The different units, which you can select here, enable you to enter gas concentrations, temperatures, lengths and pressures in units that you are comfortable with. These units are also used to present meas- urement data in a form that is most convenient for you.
  • Page 25 4.3.3 Setting-up a Monitoring Task The optical filters in the 1312 have to be calibrated before they can be used to measure gas concentrations. The user can only set-up a monitoring task using those optical filters which have been installed. In this example, we have chosen to meas- ure gas A (that is, to measure gas A’s concentration using the optical filter in-...
  • Page 26 Chapter 4−Introduction to and Familiarization with the 1312 Familiarization with the 1312 using 1312PC Software With the monitor and the PC connected properly, as described in section 2.2 section 2.5, and the 1312PC software already running: 1. Click on Online to start this option.
  • Page 27 Chapter 4−Introduction to and Familiarization with the 1312 Familiarization with the 1312 using 1312PC Software Fig.4.6 The Sequence Settings dialogue Alarm index card 9. Select the “Alarm” index card. Ensure that no alarms are selected in the Alarm box. If any alarms are selected, click on the name and then click on Remove.
  • Page 28 Chapter 4−Introduction to and Familiarization with the 1312 Familiarization with the 1312 using 1312PC Software Fig.4.7 The Start Measurement Sequence dialogue 2. Click in the Enter sequence description field and type in the desired name. This name enables you to have many measurement sequences stored under the same monitoring task name.
  • Page 29 Chapter 4−Introduction to and Familiarization with the 1312 Familiarization with the 1312 using 1312PC Software gases displayed is defined by you. Measurement data can be displayed as instanta- neous sample concentration values or as average concentration values, where you define the averaging interval.
  • Page 30 Chapter 4−Introduction to and Familiarization with the 1312 Familiarization with the 1312 using 1312PC Software 6. In the Single Gas Setup group, click in the Select Gas field and select the gas name for Filter A. 7. Click in the Select unit field and select the desired units.
  • Page 31 Chapter 4−Introduction to and Familiarization with the 1312 Familiarization with the 1312 using 1312PC Software 4.3.7 Scrolling through Measurement Results on Completion of a Monitoring Task Open the Presentation option of the 1312PC software: 1. Pull down the Task menu. Click on Open and the Open Measurement Task dialogue is displayed.
  • Page 32 4.3.8 Changing Units after a Monitoring Task The 1312 has all the measurement data as SI units. So, to change any of the displayed parameters’ units, it is simply a case of repeating the instructions in section 4.3.2.
  • Page 33 Chapter 5 The 1312 Monitor 5−1 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...

  • Page 34: Front Panel

    Their function is to inform you of the operating state of the monitor. MEASURE For example, if the LED above the push-button is lit, it indicates that the 1312 is either busy performing measurements or has been set-up to start meas- urements at a pre-defined time. 5.1.1 Direction Push-buttons This group of 5 push-buttons is referred to in this manual as the direction push- buttons.

  • Page 35: Function Push-Buttons

    Depending on the situation, this push-button acts as an “Enter” function The “Enter” function is used whenever measurement units are selected or any text, for example, filter names or gas names are being entered. The 1312 display PRESS ENTER TO CHANGE VALUE will typically display a text similar to 5.1.2...
  • Page 36 SET-UP In this mode you are able to enter the set-up “tree” of the 1312. In set-up mode the user is able to program the 1312 to perform almost any kind of measure- ment and, amongst other things;...
  • Page 37 If less than 10 mins. have elapsed since the 1312 was switched on it will per- form only the data-integrity tests when switched on again. There are essentially 3 types of self-tests which can be performed during a “partial reset”...
  • Page 38 5.3.2). This also disables the regular self- tests. If any part of the 1312 is found to be functioning incorrectly a message will appear in the display to inform the user of the problem. For example: OPERATING ERROR: PUMP TEST FAILED...
  • Page 39 PARTIAL FULL NONE is pressed, you can come out of reset mode without performing any kind of reset. The 1312 just goes back to operating the same way it was operating before RESET push-button was pressed. PARTIAL Reset: If this level of reset is chosen the 1312 stops operating,...

  • Page 40: Configuring The Monitor

    1312 to perform a reset: PERFORM FULL RESET By pressing this push-button the user can come out of reset mode without performing any kind of reset. The 1312 just goes back to operating the same RESET way it was operating before was pressed.
  • Page 41 6. Press to exit the set-up function. 5.3.2 Enabling/Disabling Self Tests If you do not wish the 1312 to perform regular self tests, including the hardware test on power-up (see section 5.1.3 for a full explanation), you can disable it.

  • Page 42: Alarm Relay

    1312 is switched on. This means that there is a direct electrical connection between pins 1 & 2 and pins 4 & 5 at all times except when the 1312 measures a gas concen- tration which is greater than the alarm limit for the gas. When this concentration is measured, the 1312 breaks the connection between pins 1 &...
  • Page 43 Chapter 5−The 1312 Monitor Alarm Relay cause an excessive leakage current. The current through the contacts must not exceed 100 mA. AC voltages must not be connected to the Alarm Relay socket. Configuration of the pins in the alarm relay socket Fig.5.2...
  • Page 44 Chapter 5−The 1312 Monitor Alarm Relay 5−12 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...

  • Page 45: Keying-In Parameters

    Chapter 6 Keying-in Parameters 6−1 BE 6002−11 Photoacoustic Multi-gas Monitor Type 1312 Instruction Manual...

  • Page 46: Types Of Parameters

    But only one of these parameters can be selected at any one time. Check Boxes. These are commonly used for functions where more than one can be selected, simultaneously. When the tick is displayed, the function is selected. 6−2 Photoacoustic Multi-gas Monitor Type 1312 INNOVA Instruction Manual...
  • Page 47 Definable values. Some parameters require a value defined. This value must lie within the permitted range. If you enter a value outside the range, a warning appears on screen telling you to enter a value which is within the range. 6−3 BE 6002−11 Photoacoustic Multi-gas Monitor Type 1312 Instruction Manual...
  • Page 48 Chapter 6−Keying-in Parameters Choosing Parameters 6−4 Photoacoustic Multi-gas Monitor Type 1312 INNOVA Instruction Manual...
  • Page 49 Chapter 7 Setting-up and Starting a Monitoring Task 7−1 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...

  • Page 50: Normalization Temperature

    Before a measurement task can commence, there are a variety of parameters that must be defined first. This is called “Setting up the 1312”. This chapter instructs you on how to set up the 1312 monitoring system before starting to measure.
  • Page 51 All the parameters’ units are now set. 7.1.2 Offline Unit Set-up With the Offline program running: 1. Click on the Units softkey at the bottom of the dialogue box. The Units dialogue appears, see Fig.7.1. 7−3 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 52 Air Pressure: the actual air pressure read from your barometer, see Table 7.6. Water Interference: the 1312 is capable of measuring water’s contribution to the signal measured in its analysis cell. The user can decide whether or not the 7−4...
  • Page 53 If average values are desired, then the example below illustrates how the values are calculated and displayed. Let us suppose that the 1312 has been taking measurements every 2.5 mins., over a period of 30 mins., of gas A (acetone), and the following results (un- shaded area) were obtained and recorded.
  • Page 54 Note: only one gas per filter can be selected at a time for measuring. The W position always represents the water filter installed in the monitor. 7−6 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 55 PC Beep: (Online only) when an alarm is triggered the PC makes a beeping noise. 1312 Beep: when an alarm is triggered the monitor makes a beeping noise. 1312 Relay 1 & 1312 Relay 2: selecting these options enable you to connect 7−7 BE 6002−11...

  • Page 56: Measurement Setup

    9. Click in the Air Pressure field and type in the value read from your barometer. Gas index card 10. Click on the “Gas” index card. 11. Click in the check box to the left of the desired filter. 7−8 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 57 Sequence Settings dialogue to the monitor. 27. When the transfer is complete, Click on the Close softkey to exit the Offline program. You are now ready to start measuring, see section 7.3.2. 7−9 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 58 To determine the duration of the monitoring sequence, click on the Stop at: radio-button and define the stop time. 5. Press OK to start the monitoring task. 7−10 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 59 PROCEED STOP Display Memory is where the 1312 stores the results of all measurements while it is performing a monitoring task. If the monitoring task is stopped and then started again all the data already collected will be deleted from Display Memory.
  • Page 60 MEASUREMENT IN PROGRESS RESULTS NOT YET AVAILABLE 4. When the first measurement cycle is complete the 1312 will automatically dis- play the results and update them every time a new measurement cycle is com- pleted. An example is shown below:...
  • Page 61 Stopping the Monitoring Task If no pre-set monitoring period is defined, then to stop the monitoring task, press MEASURE 7−13 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 62 Chapter 7−Setting-up and Starting a Monitoring Task Starting and a Monitoring Task 7−14 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 63 Chapter 8 Viewing Measurement Data — using a PC 8−1 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...

  • Page 64: Measurement Data

    Uploaded to the PC. All measurement data from the 1312 monitor, regardless of what is being displayed on screen during the measurement, is transferred to the PC and stored in a MS- ®...

  • Page 65: Graphic Window

    Time: this is a toggle option. You can select either this option or the measurement number option. This option enables you to define the X-axis as a period of time. 8−3 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 66 Autoscale maximum (minimum = 0): by selecting this option, the axis will al- ways start at zero. The top value depends on the maximum value. With the Online option, the scale will increase when the concentrations exceed the dis- 8−4 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 67 All the selected gases are dis- played. If you want to change any of the display parameters, then do this using the Windows Properties dialogue. 8−5 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 68 Gas Monitor Warnings/Errors: Event Marks Description Common Marks: apply to all filters The 1312 stopped measuring due to a power failure, but automatically re-started “P” monitoring again after regaining power. The 1312 was “reset” because a fault was detected. “U”...
  • Page 69 For the Online option, the x-axis works like a rolling window, where the latest measurement is always displayed at the bottom of the column. For the presentation option, several meas- 8−7 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 70 All the selected gases are displayed. If you want to change any of the display parameters, then do this using the Windows Properties dialogue. 8−8 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...

  • Page 71: Using The Cursors

    Gas Monitor Warnings/Errors: Event Marks Description Common Marks: apply to all filters The 1312 stopped measuring due to a power failure, but automatically re-started “P” monitoring again after regaining power. The 1312 was “reset” because a fault was detected. “U”...
  • Page 72 The displayed gases (and their display units) are listed on the left-hand side of the dialogue. Opposite each gas are several values under the headings: Minimum: this shows the minimum value for each gas between the cursors. 8−10 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...

  • Page 73: Zoom Function

    Note: the Cursor Values dialogue updates each time the new cursors are displayed. There are two ways to zoom out again. You can pull down the View menu and click on Zoom out. 8−11 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...

  • Page 74: Status Windows

    The user event marker will appear at the designated point. Status Windows There are two status windows: Alarms status and Measurement status. These can be displayed when the Online program is being used. 8−12 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...

  • Page 75: Alarms Status

    1. If you want to open another window, pull down the Window menu and click on New Graphic Window or New Numeric Window. 2. Click in the window you want to set up, and pull down the Edit menu. Click on Window Properties, see Fig.8.2. 8−13 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 76 If the gas you want to display is not present in the All Columns field, click on Add New or Insert Before. 7. In the Single Gas Setup group, click in the Select Gas field and select the de- sired gas name. 8−14 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 77 All Curves list. 24. Press OK to save the selections and exit the dialogue box. The measured data will now be displayed on screen. 8−15 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 78 9. If the gases and their units displayed in the All Columns field are not correct, click on the gas you want to change. If the gas you want to display is not present in the All Columns field, click on Add New or Insert Before. 8−16 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 79 23. Select the desired colour, style and units. 24. Repeat steps until all the gases you want displayed on the right y-axis are in the All Curves list. Events index card 25. Click on the Events index card. 8−17 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 80 Although the measurement data may be displayed on screen, you can change any of the parameters, including the averaging value, in the Window Properties dialogue when ever you please without losing any data in the process. 8−18 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 81 Chapter 9 Database Administration for PC Use 9−1 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 82 4. Now define the destination where the backup should stored and click on OK. A copy of the selected database is now made. If you want to use this database again, use the Restore option. 9−2 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 83 Click on Cancel to exit the Restore dialogue when all the desired databases have been restored. Delete Databases This option enables you delete measurement and calibration databases from the 1312PC Software working directory without disturbing the filter information. 9−3 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 84 2. Use the standard Windows 95 browser, which appears on screen, to define thee destination for the exported data. 3. Type in the desired file name. All files have a .TXT extension. 4. Click on Export. 9−4 INNOVA 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 85 Chapter 10 Storage of Data in the 1312’s Memory 10−1 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...

  • Page 86: Read Only Memory (Rom)

    Data stored in this memory cannot be changed by the user. The Optical Filter Factors, which describe each of the optical filters which are available for installa- tion in the 1312, are stored in this memory. These factors are listed in a print-out of the “Calibration Data Block” (see section 12.7).
  • Page 87 There are six different “data files” in this block. Each data file is denoted by a letter which indicates the position a particular optical filter occupies in the 1312’s carousel. Each file “A” to “E” is divided into five sections called Filter Banks, which are numbered from 1 to 5.
  • Page 88 Suppose that filter UA 0976 is installed in position “A” of the filter carousel to measure each of the above gases. Before this filter is calibrated, the 1312 has to be told where to store the calibration factors which are calculated during the calibra- 10−4...
  • Page 89 Bank No.“2” for acetic acid and Filter Bank No.“3” for vinyl chloride. After calibration of the filter UA 0976 the 1312 is able to accurately monitor any of the three gases mentioned — but only one of these gases during any particular FILTER BANK NO.
  • Page 90 Block 1 — Calibration Factors and 3 Optical-filter Parameters from Each Active Filter Bank: If, for example, 5 optical filters are installed in the 1312 and their UA numbers have been entered in the active set-up and Filter Bank No. 2 has been selected for filter “A”;...
  • Page 91 Block 4 below) to protect it against accidental deletion. Alternatively, the data in Display Memory can be printed out by connecting a printer to the 1312 and trans- mitting data via either the IEEE 488 or the RS 232 interface port of the 1312 (see Chapter 12).
  • Page 92 10.1.1, the UA no. determines the set of Optical Filter Factors used during the calculation of calibration factors and therefore, if the UA number of any filter is changed in the active set-up of the 1312, all calibration 10−8 1312 Photoacoustic Multi-gas Monitor...
  • Page 93 “A” in the Working Memory and from files A 1, A 2, A 3, A 4 and A 5 in the Source Memory of the 1312 (see Fig.10.3). The 1312 will not be able to measure any gas with filter “A” until it has been fully calibrated, see Chapter 12 details.
  • Page 94 “A” to “E” is no. 1, then only the calibration data in files A 1; B 1; C 1; D 1; E 1 and W will be found in the 1312’s Working Memory after a FULL RESET .

  • Page 95: Storage Of Measurement Results

    10.2 Storage of Measurement Results While a monitoring task is being performed measurement data is stored in the 1312’s Display Memory. When the monitoring task is complete the data in Display Memory is normally copied into the 1312’s Background Memory to prevent it from being overwritten (and therefore lost) by measurement data stored during the next monitoring task.
  • Page 96 Chapter 10−Storage of Data in the 1312’s Memory Storage of Measurement Results Background Memory — let us say it is stored in location 4. Back- ground Memory is now 100% full (see 10.5). The Background Memory has now been filled-up by the data from the four monitor- ing tasks described above, even though location nos.
  • Page 97 Chapter 10−Storage of Data in the 1312’s Memory Management of Data in Background Memory Whenever the 1312 is operating in Memory mode the user can, by pressing the INFO push-button, find out what percentage of the Background Memory is occu- pied and which location numbers have been used to store data.
  • Page 98 10.3.1. 4. Press . If data has not been stored in the chosen location, a message will appear on the 1312’s display to inform the user. Otherwise, the data from the 10−14 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 99 It is not necessary for the user to remember the numbers of the locations in Back- ground Memory which have been used to store data. When the 1312 is operated in Memory mode, users can at any time find out which locations are used, and what percentage of the Background Memory’s total data capacity has been used by:...
  • Page 100 The numbers appearing on the above display are those which contain stored data. The 1312 will show the above “Information text” display for a short period of time and then automatically change back to the text which was showing on the display...
  • Page 101 Chapter 11 Maintenance of the 1312 11−1 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 102 Chapter 11−Maintenance of the 1312 Changing the Fine Air-filters The only regular maintenance required for the 1312 is: Calibration — approximately every 3 months (see Chapter Changing the fine air-filter paper in the internal and external air-filtration units (see section 11.1)
  • Page 103 Chapter 11−Maintenance of the 1312 Changing the Fine Air-filters Fig.11.2 The internal air-filtration unit Inside the unit, a fine (10µm) filter-paper removes fine dust particles and other suspended matter from air samples before they reach the measurement chamber of the monitor.
  • Page 104 Chapter 11−Maintenance of the 1312 Changing the Fine Air-filters Fig.11.3 The external air-filtration unit UD 5023 used with the analyzer Changing the fine filter-paper in both the internal and external air-filtration units is explained step by step in the following two sub-sections.
  • Page 105 Chapter 11−Maintenance of the 1312 Changing the Fine Air-filters filter-paper, while holding the handle of the unit between your thumb and fingers. Refer to 11.4. The retaining disc has two tabs which “lock” it to the filtration unit. Fig.11.4 Removing the retaining disc and old filter-paper 5.
  • Page 106 Chapter 11−Maintenance of the 1312 Changing the Fine Air-filters 7. Hold the handle-end of the unit between your thumb and fingers. Moisten a cotton bud with pure acetone and use it to clean the surfaces of the unit Refer to 11.5.
  • Page 107 Chapter 11−Maintenance of the 1312 Changing the Fine Air-filters 8. Remove a new fine filter-paper from its packaging using the tweezers. Hold it by its edge . Refer to 11.6. Lift the filter up and place it inside the unit.
  • Page 108 Chapter 11−Maintenance of the 1312 Changing the Fine Air-filters 9. Holding the handle-end of the unit between your thumb and fingers, pick up the (dry) retaining disc and place it over the new filter-paper. Refer to 11.7. Gently press the disc down over the filter-paper, making sure that the disc’s locking tabs fit properly into the groove in the unit and that the filter-paper stays in position and is not damaged in any way.
  • Page 109 Chapter 11−Maintenance of the 1312 Changing the Fine Air-filters To change the filter-paper: 1. Switch off the monitor. 2. Put a rubber glove on the hand which is to hold the parts of the unit. ® 3. Pull the external fine air-filtration unit off the end of the Teflon sampling tube.
  • Page 110 11.9). The ventilating fan in this unit circulates air through the 1312 to keep it cool. To ensure that the air being drawn into the 1312 is free of particles a filter pad is placed between the fan and grid which covers it. This filter needs to be periodically taken out and cleaned.
  • Page 111 Chapter 12 Calibration of the Optical Filters 12−1 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 112 “A”, “B”,“C”, “D”, or “E” of the filter carou- sel wheel in your 1312. A special optical filter, which is only selective to water vapour, is always installed in position “W”. Before leaving the factory, the optical filters are either partially or fully calibrated and then a span check is performed on each of the installed optical filters to check that the 1312 is functioning properly.
  • Page 113 As it is the optical filter which determines the wavelength of light, cell noise will depend upon the optical filter being used. 12−3 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 114 This cell-noise signal is measured during the Zero-point Calibration of each fil- ter. A supply of dry, zero gas is attached to the air-inlet of the 1312 and the signal in the cell is measured with each installed optical filter (“A” to “E”). This signal is called the concentration offset factor for the filter.
  • Page 115 80 µV, we know that this concentration of water vapour will produce a signal of 8 µV when Filter “A” is used. Measurements made during humidity-inter- ference calibration of the installed filters therefore enable the 1312 to compensate any measured signal for water-vapour’s interference.
  • Page 116 12.3.1 Obtaining a Print-out of Calibration Data in the Monitor Whether the 1312 is to be used online or as a stand-alone instrument, the 1312PC software can be used to check the 1312’s existing calibration. All the calibration factors can be printed out directly from the 1312PC software using the “Print all...
  • Page 117 12.3.2 Checking the Calibration of Each Installed Optical Filter A print-out of the calibration data in the 1312’s memory is useful to have for refer- ence. It also enables you to find out how “old” calibration factors compare with the “new”...
  • Page 118 1312, and it requires no further calibration. When all installed optical filters (in positions “A” to “E”) have been zero-point, humidity-interference, span and cross-interference calibrated (if necessary) then the 1312 is able to perform accurate measurements.
  • Page 119 “entered” correctly in the active set-up of the 1312. If the incorrect UA number is “entered” for the optical filter in a particular position, the incorrect optical filter factors will be used in the calculation of the calibration factors, and calibration will therefore be useless.
  • Page 120 Three different lengths of teflon tubing are connected to a “Y”-piece. The tube at- tached to point 1 is connected to the air-inlet of the 1312; the tube attached to point 2 is attached to a gas flow meter or similar apparatus; and the tube attached to point 3 is attached to the cylinder of gas which is to be used during calibration.
  • Page 121 It functions as an escape valve. When the pressure of the gas in the tubing becomes greater than atmospheric pressure, gas flows out to the atmosphere via 12−11 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 122 1312. Note the length of the respective tubes in the flasks. It is vitally important that any water which col- lects in the extra flask does not cover the short outlet tube “B”.
  • Page 123 The basic calibration can be divided in to 3 stages: Measuring Raw Data Calculating Calibration Values Downloading the Calibration Values to the Filter Banks 12−13 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 124 The monitor measures raw data, so these units do not affect the display data. Click on OK. 5. Pull down the Sequence menu. Click on Settings. The Calibration Sequence Settings dialogue is displayed, Fig.12.8. 12−14 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 125 This takes several minutes, so wait until it has finished before continuing. If you are performing a span calibration, follow the steps given in section 12.9.1. For zero-point and humidity calibrations follow the steps here. 12−15 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...

  • Page 126: Starting A Calibration

    Connect the free-end of the teflon tubing mentioned in section 12.4 to the pressure valve on a cylinder of calibration gas. b. Gently open the pressure-valve on the gas cylinder. 2. Pull down the Sequence menu and click on Start. 12−16 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 127 This enables you to gather all the measurement data and then calculate all the calibration factors in a single operation. Stopping a Calibration Task Pull down the Sequence menu and click on Stop. 12−17 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 128 Single point or Two point (High conc.) span calibration (filter A) SLA: shows a Two point (Low conc.) calibration (filter A) 4. When the calculation(s) is complete a Calculation Finished dialogue is displayed. 12−18 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 129 NOTE: calibration factors calculated for a specific filter can not be downloaded to filter banks of another filter. 12−19 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 130 Several ticks enables cali- bration factors to be downloaded to several banks for the same filter. The grey boxes – these filter banks are not available – therefore no calibra- 12−20 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 131 1. Pull down the Bank menu, Click on Download Banks to Gas Monitor and the Download Banks to 1312 dialogue appears. 2. Click on the desired radio-button: All Banks or Single. If you select Single, highlight the correct filter and filter bank.

  • Page 132: Zero-Point Calibration

    If you only wish to use the water-vapour filter to compensate for water-vapour interference, then it only has to be zero-point calibrated. If you wish to use it to 12−22 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 133 12.1). Cross-interference calibration cannot be performed alone! It has to be performed together with the span calibration of each of the installed optical filters. Cross-interference calibration is not selective, that is, if 12−23 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...

  • Page 134: Span Calibration

    During span calibration a supply of a particular gas (e.g. gas A1) of known concen- tration is attached to the air-inlet of the 1312 and the total signal in the cell is measured using the water-vapour filter and the filter which is being span calibrated (for example “A”).
  • Page 135 (see Fig.12.13, Fig.12.14a and Fig.12.14b). However, we can give you some guidelines on whether you have to perform a single- or a two-point span-calibration. 12−25 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 136 ) of span gas. This enables high high the 1312 to compensate for any unlinearity in the relationship between the signal measured in the cell and the concentration of the gas in the cell (this is illustrated, for a gas A1, in Fig.12.14a).
  • Page 137 If not go to step If you are calibrating for a new gas, or an existing gas in a new filter bank, then 12−27 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 138 7. Type in the correct gas concentration. 8. If you require a cross-interference calibration, click in this check box when the High Gas Conc. radio-button is selected. 9. Repeat steps selecting the other gas concentration. 12−28 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 139 Use of Nafion Tubing during Span Calibration of CO , CO and N A length of Nafion tubing is supplied as an accessory with the 1312. It is required during the span calibration of carbon dioxide (CO ), carbon monoxide (CO) and dinitrogen oxide (N O).
  • Page 140 Gas - supply tubing tubing tubing the 1312 cylinder Attachment point no.3 INNOVA 1312 Photoacoustic Multi-gas Monitor AirTech Instruments TALK LISTEN RESET MEASURE AVERAGE EVENT INFO MEMORY PRINT SET-UP Photoacoustic Multi-gas Monitor 900871_1e 12−30 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 141 Chapter 13 Installing the Optical Filters 13−1 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 142 Introduction 13.1 Introduction Each of the optical filters available for use with the 1312 have a “UA” number printed on them. The “UA” numbers run from UA 0968 – UA 0988 and UA 0936. The 1312 has a carousel wheel on which relevant optical filters are mounted. There are six mounting holes in the carousel.
  • Page 143 6. 3. Turn the 1312 so that it is resting on its “feet”. Undo the catch holding the lid over the front-panel of the 1312 and remove the lid by pushing it gently up- wards to release it from its hinges.
  • Page 144 1312, and rest its upper edge against the front of the 1312 (see Fig.13.2b). Note: take care that the cable connecting the front panel to the rest of the 1312 is not pulled out of its plug.
  • Page 145 1312. Insert it through the mounting hole from behind the carousel wheel (that is, it must be inserted in a direction toward the front-panel of the 1312). Hold it in this posi- tion until step 15. is completed. 15.Take the special tool QA 0170 holding the “locking”...
  • Page 146 (for example, UA 0987 in position “B”, UA 0988 in position “D” and so on). 18.Fig.13.7 shows the inside of the top cover of the 1312. Note that the front side of the cover has square flanges . Place the top cov- er back in its correct position on top of the 1312.
  • Page 147 Chapter 13−Installing the Optical Filters Introduction filter. If the UA number is not correctly entered then the filter cannot be cali- brated to measure any gas accurately. 13−7 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 148 Chapter 13−Installing the Optical Filters Introduction 13−8 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 149 Chapter 14 Messages Related to Calibration 14−1 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...
  • Page 150 The messages displayed when is used are discussed in section 14.4. ZERO–POINT CALIBRATION SUCCESSFUL HUM. INTERFERENCE CALIBRATION SUCCESSFUL ZERO–POINT/HUM. INTERF. CALIB. SUCCESSFUL GAS X* SINGLE–POINT CALIB. SUCCESSFUL GAS X* TWO–POINT CALIBRATION SUCCESSFUL 14−2 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 151 14.4.1 “Invalid” Error Messages MISSING MEASUREMENT DATA This message indicates that the 1312 does not have the necessary data to calculate absolutely valid calibration factors. This situation could, for example, be caused by too much noise in the analysis chamber. The calibration task will have to be repeat- WATER VAPOUR MEASUREMENT <...
  • Page 152 GAS X: LOW MEAS. > HIGH MEAS. GAS X: MEAS. INDICATES LINEAR COHERENCE GAS X: MEAS. DOES NOT FIT NON-LINEAR CURVE GAS X: CALIBRATION IMPOSSIBLE: MAX ITER. All these messages are associated with a two-point span calibration task. 14−4 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 153 ) and (V ) can than be plotted on a graph (see Fig.14.1). When the two signals have been measured, the 1312 then finds the value δ = 1% of and finds out the relationship between the measured values: 14−5 BE 6002−11...
  • Page 154 SPAN CALIBRATION IMPOSSIBLE This message is associated with the span calibration of the water-vapour filter. The above message indicates that the 1312 cannot calculate the gas conversion factor. This could indicate that the concentration of water-vapour used during the calibration was too low — this could either be due to an incorrectly “entered” water- 14−6...
  • Page 155 (“A” to “E”). During all the above-listed calibration tasks, the signal in the cell is measured using the water-vapour filter: this enables the 1312 to compensate for any interfer- ence signal produced by the presence of any water-vapour in the span gas/zero-gas being used.
  • Page 156 The above message indicates that the signal measured during span calibration, when the low concentration of span gas is in the cell, is less than 3 µV. This means that the “low” concentration of span gas is too low. 14−8 1312 Photoacoustic Multi-gas Monitor INNOVA Instruction Manual...
  • Page 157 Chapter 15 Warning and Error Messages 15−1 BE 6002−11 1312 Photoacoustic Multi-gas Monitor Instruction Manual...

  • Page 158: Chapter 15−Warning And Error Messages

    Chapter 15−Warning and Error Messages When the 1312 is switched on, and while it is being operated, the 1312 regularly performs a series of self-tests which check that the various mechanical, electrical and electronic components of the 1312 are functioning correctly. These self-tests are...
  • Page 159 Description of Fault Possible Cause(s) The air pressure difference 1. The length of the sampling tube created by the pump in the attached to the 1312’s air inlet has pneumatic (airway) system been incorrectly entered. (tubes and/or analysis cell) is 2.

  • Page 160: Warning Messages

    Chapter 15−Warning and Error Messages Warning Messages Displayed Text Description of Fault Possible Cause(s) The 1312’s internal clock was found to be incorrectly set so CLOCK SET TO DEFAULT A new battery has been installed. these values have been set to ERROR DETECTED IN CLOCK SETTINGS their default values.
  • Page 161 1. A defective back-up battery. Configuration and/or Format 2. A defective Working Memory PARAMETERS SET TO DEFAULT branches of the 1312’s set-up (RAM). ERROR DETECTED IN CONFIG./FORMAT PARAM. tree, and therefore, the 1312 3. A software fault.
  • Page 162 1. The ventilating fan is defective. or too low. As the 1312 is 2. The ambient air temperature is operating outside either too high or too low. INTERNAL TEMPERATURE OUT OF RANGE...
  • Page 163 The 1312 is likely to interpret 2. The analogue card is defective. VIBRATION LEVEL TOO HIGH the signal as being due to the 3. The 1312 is being exposed to presence of gas and therefore external vibrations (around 20 Hz). gas concentrations measured...
  • Page 164 Possible Cause(s) The 1312 wishes to send data There are no other “controllers” on to a printer via the IEEE the IEEE bus, so the 1312 should be IEEE CONTROL TIMEOUT interface, but the 1312 is not made the system controller.

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