Instruction Manual - Delta Instrument LLC
Contents
1. 2 1 Adjusting Variables a b c d e 2 To read Sensor and Instrument information change the display contrast and enable disable the automatic shut down facility Press the keys marked A and e together and hold pressed for approximately 4 seconds The display will read SENSOR INFORMATION Press the key marked y once The display will show the sensor probe serial number Press the key marked ad once more The display will show the calibrated range of the sensor installed Press the key marked y once more The display will show the calibration date of the sensor installed Press the key marked nd once more The display will show the suggested date of recalibration of the sensor installed Normally 12 months after the calibration date Press the key marked 22 once The display will show the instrument type and software version Press the key marked ea once more The display will show LCD CONTRAST LIGHTER DARKER At this point the contrast can be adjusted to the desired level by pressing either the key marked a to lighten the display or nd to darken the display Page 2 h 1 NOTE The contrast is incremented by the keys and does not scroll by holding the keys pressed When the contrast level is satisfactory move to step h Press the key marked 22 once more The display will show AUTO SHUT DOWN together with the status of this facility either ON or OFF To put th2. dewSMART Model DSP Ex Portable Dewpoint Meter Instruction Manual Alpha Moisture Systems Alpha House 96 City Road Bradford BD8 8ES England Tel 44 1274 733100 Fax 44 1274 733200 Email info amsytems co uk Web www amsystems co uk D Soy AA Model DSP Ex Automatic Dewpoint Meter Index General Descriptions mnta e A date need dalle eee ane ek 1 Instrument Configuratio rd A adan diante 1 2 1 Adj sting Variables aa ea e eas o aera SOSEO meee 2 22 Selecune MAINE COS ol E R 3 ONKI OIIE rAll ON TAPE E E T EE TS 5 Factory Calibration O E aiaa gue dia EASE E 7 Batteries id dad 7 A O 7 Hazardous Aiea E dd e 8 1458 DSP Ex User Manual Issue 1 0 1 General Description The Model DSP Ex Automatic Dewpoint Meter is a fully self contained portable instrument specifically designed to measure the moisture content of air or gas on a spot check basis The instrument is operated with its own internal batteries and requires no external power source The read out of moisture content is on a dot matrix LCD in any one of several selectable engineering units The unique measuring head is designed to keep the sensor dry when the instrument is not in use making spot checks a simple and speedy process with minimum air or gas usage Model DSP Ex utilises Alpha Moisture Systems advanced dewSmart sensor which allows complete interchangeability of sensors and ranges The calibrated measuring range is stored
3. each having two current limiting resistors potted into one end There are no other sources of supply and no connections to external devices The apparatus is housed in a steel enclosure with a plastic window to allow reading of the LCD The enclosure also houses a certified DewSmart Sensor 14 DESCRIPTIVE DOCUMENTS 141 Drawing No Sheets Issue Rev Date Title 821 1 to 2 3 1 23 Jul 98 Schematic 822 1of 1 4 2 11 Aug 98 Parts list 823 1 2 3 0f 6 3 3 11 Aug 98 Artwork 832 1 of 1 1 1 22 Jul98 Cable assembly 834 1of1 2 220ct02 Battery carrier 843 1of1 1 2 04 Aug 98 General arrangement 846 1 to 2 1 2 04 Aug 98 GA parts list 1195 1 of 1 1 01 Jul03 Labels 14 2 Report No R52A9102B 15 SPECIAL CONDITIONS FOR SAFE USE denoted by X after the certificate number 15 1 Under certain extreme circumstances external non metallic parts of this equipment may generate an ignition capable level of electrostatic charge Therefore when it is used for applications that specifically require group II category 1 equipment the equipment shall not be located where the external conditions are conducive to the build up of electrostatic charge on such surfaces Additionally the non metallic parts of the equipment shall only be cleaned with a damp cloth 16 ESSENTIAL HEALTH AND SAFETY REQUIREMENTS OF ANNEX II EHSRs The relevant EHSRs that are not addressed by the standards listed in this certificate have been identified and individually assessed in Report No R
4. will automatically switch itself OFF again Access to the batteries for replacement purposes is gained by firstly removing the cover plate on the back panel of the instrument using the Allen Key provided and then unscrewing the covers from both of the battery holders Fit new batteries as shown on label adjacent to the battery holders replace the covers and refit the cover plate 6 Transit Case if Supplied The transit case is designed specifically to protect the instrument during transportation and storage Access to the analyser within the case is achieved by lifting the two catches towards the carrying handle and moving the latch bars away from the upper section of the locks The instrument can be operated either while still installed in the transit case if the handle is positioned to allow full movement of the sample chamber or removed from the case for ease of positioning near to the sample point The sample tube dewpoint calculator and Allen key to remove the battery carrier cover plate are housed in the hinged section inside the lid of the transit case Page 7 The case carrying shoulder strap and keys to lock the case are also housed in the hinged section inside the lid Access to this storage compartment is achieved by pulling the small leather strap positioned near the outer edge of the hinged cover to release the two spring catches which secure it Ensure that both catches are secure when closing the cov
5. within the sensor and is readable from the analyser display see page 2 item 2 Details of normal operation engineering unit selection sensor data and configuration of the instrument are described within this manual Instrument Configuration The standard factory settings are such that the instrument will display the moisture content in C Dewpoint has the auto switch off facility activated and the display contrast set at a mid point The other facilities and information available from the sensor and instrument are determined by the range of sensor in use it s calibration data and the hardware of the instrument itself To access the available information and change variables use the following procedure Switch the instrument on by pressing the I 0 key once The display will read the word INITIALISING This is the normal start up routine during which the functions of the instrument and integrity of the sensor calibration data are verified The display will then read INSTRUMENT OK This confirms that all instrument functions are working normally Page 1 The display will then read CALIBRATION DATA OK This confirms that normal communications with the sensor have been established and that the integrity of the calibration data held within the sensor has been verified The display will then read the moisture content of the air surrounding the sensor in C Dewpoint or the equivalent in other engineering units 1f so selected
6. 52A9102B 17 CONDITIONS OF CERTIFICATION 17 1 The use of this certificate is subject to the Regulations Applicable to Holders of SCS Certificates 17 2 Holders of EC type examination certificates are required to comply with the production control requirements defined in Article 8 of directive 94 9 EC 17 3 This certificate relies on the following previously certified product When used as part of the equipment the key attributes listed in the table below shall still be maintained by their original certificate Product Certificate number Key attributes dewSMART Digital Sira 02ATEX2131X EEx ia IIC T5 Ta 20 C to 60 C Dewpoint Sensor U 11 V I 0 1 A P 0 283 W C 1 66 uF L O Date 6 November 2002 Re issued 15 September 2003 This certificate and its schedules may only be reproduced in its enti ER fertification Service Rake Lane Eccleston Chester CH4 9JN England Tel 44 0 1244 670900 Fax 44 0 1244 681330 Email exhazard O siratc co uk Page 2 of 2 Sira Certification Service is a service of Sira Test amp Certification Ltd ST amp C Chester Form 9176 Issue 6
7. ally positioning the handle Releasing the buttons allows the handle to lock into the required position It is not important which position the instrument is placed in as 1t will operate in any attitude Switch the instrument ON by pressing the key marked 1 0 NOTE When the instrument is switched ON the instrument will go through its initialising routine and data verification procedures described above This routine takes approximately 10 seconds after which time the instrument will display the moisture content of the air or gas surrounding the sensor in whatever engineering units have been selected This will happens every time the instrument is switched ON The sample tube supplied is fitted with a Female Swagelok quick connect coupling at one end for connection to the male connector positioned below and to the left of the measuring head To make this connection simply push the two halves of the connector together and allow the locking ring to locate To disconnect this coupling push the locking ring towards the instrument panel and the two halves will spring apart The other end of the sample tube is supplied with a 1 8 NPT male connector which should be adapted to fit the sample point connector NOTE It is important to note at this time that the material used for the sample tube is critical especially when measuring very low moisture levels The ideal material is stainless steel but this is normally impractical for a portable in
8. er of the compartment to guarantee secure storage of the items held within 7 Hazardous Area Certification See next page Page 8 sira Certification Service 1 EC TYPE EXAMINATION CERTIFICATE 2 Equipment intended for use in Potentially Explosive Atmospheres Directive 94 9 EC 3 Certificate Number Sira 02ATEX2132X Equipment Model DSP Ex Automatic Dewpoint Meter 5 Applicant Alpha Moisture Systems 6 Address Alpha House 96 City Road Bradford BD8 8ES England 7 This equipment and any acceptable variation thereto is specified in the schedule to this certificate and the documents therein referred to 8 Sira Certification Service notified body number 0518 in accordance with Article 9 of Directive 94 9 EC of 23 March 1994 certifies that this equipment has been found to comply with the Essential Health and Safety Requirements relating to the design and construction of equipment intended for use in potentially explosive atmospheres given in Annex II to the Directive The examination and test results are recorded in confidential report number R52A9102B 9 Compliance with the Essential Health and Safety Requirements with the exception of those listed in the schedule to this certificate has been assured by compliance with the following documents EN 50014 1997 including amendments A1 and A2 EN 50020 2002 EN 50284 1998 10 If the sign X is placed after the certificate number it indicates that the equipment is subject to spec
9. ere is any uncertainty as to whether equilibrium has been achieved in the system pipework and measuring head which is necessary to reach an accurate measurement a simple test can be carried out as follows a After the display has stopped moving increase the sample flow slightly b Observe the display 1 If the displayed value remains constant the reading is accurate 11 If the displayed value begins to fall the system was insufficiently purged and water vapour is still outgassing from the internal surfaces of the sample pipe work or measuring head OR there is a leak at the sample valve or one of the connections It is very important to note that if there is a leak in any part of the system water vapour will defuse from the ambient air into the sample even though the gas is flowing out of the faulty connection When the measurement is complete a Close the measuring head by manually pushing the extended section back towards the panel front and switch the instrument OFF NOTE Ensure that the measuring head is fully closed Failure to do so will cause the internal desiccant to become wet and impair the efficiency of operation of the instrument b Remove the sample by closing the valve at the tapping point c Disconnect the sample tube from the instrument and sample point This completes the procedure and the instrument can be removed to the next test point or stored until required again NOTE If the reading taken from t
10. essed as parts of water vapour per million parts of gas PPB V As ppm V but expressed in parts of water vapour per billion parts of gas This unit is only used in cases where the moisture content of the gas is less than 1ppm V 1000 ppb V At levels above 1000 ppb V the instrument display will show OUT OF RANGE if switched to the PPB V section g m3 Mass of water per unit volume of gas expressed as grams of water per standard cubic meter of gas Ib MMSCF As g m3 but expressed as pounds of water per million standard cubic feet of gas PPM W Similar to PPM V but with reference to mass weight rather than volume In this case the ratio of weights change with the molecular weight of the carrier gas When the required units of measurement are displayed press to enter this information into the instrument The instrument will then display the moisture content in the selected engineering units on each subsequent start up If the enter key is pressed to select PPM W units the option is then available to select one of several common gases or a variable setting where the molecular weight of any other gas can be entered This option is denoted by the letters SG Select Gas which will be seen in the top right hand corner of the display The common gas types installed are AIR ARGON NITROGEN CO2 SF6 amp H2 Scrolling through these options is achieved by pressing the key marked Following the end of the list shown above the
11. he instrument is in OC or OF dewpoint it is important to remember that this value is at 1 bar A pressure If the dewpoint is required at any other pressure the dewpoint calculator supplied with the instrument should be used to calculate that dewpoint Instructions for use are printed on the calculator face Page 6 4 Factory Calibration Comparing the readings given from the instrument with those obtained from a standard traceable dewpoint analyser performs factory calibration The traceability is to the British Standard Moisture Generator held at the National Physical Laboratory London These comparative results are detailed in the Certificate of Test and Calibration supplied with the instrument 5 Batteries The Model DSP Ex is powered by 6 x C size batteries The typical battery life is in excess of 250 hrs continuous operation The analyser will display in the top left hand corner of the screen the letters LB LOW BATTERY when the batteries are to be changed At the point when the LB sign is displayed there is approximately 2 hrs battery life left before the sign changes to VLB VERY LOW BATTERY At the point when the VLB sign is displayed the batteries will only power the instrument for a further 30 minutes at which time the instrument will shut down totally and will not be operational until new batteries are installed If the instrument is switched ON after the very low battery automatic shut down has taken place it
12. ial conditions for safe use specified in the schedule to this certificate 11 This EC type examination certificate relates only to the design and construction of the specified equipment If applicable further requirements of this Directive apply to the manufacture and supply of this equipment 12 The marking of the equipment shall include the following Ex II 1G EEx ia IIC T4 Ta 20 C to 37 C EEx ia IIC T3 Ta 20 C to 50 C Project Number 52V10767 C Ellaby C i Date 6 November 2002 Certification Officer Re issued 15 September 2003 C Index 13 This certificate and its schedules may only be reproduced in its entirety and without change Sira Certification Service Rake Lane Eccleston Chester CH4 9JN England Page 1 of 2 Tel 44 0 1244 670900 Fax 44 0 1244 681330 ST amp C Chester Form 9176 Issue 6 poss aif _ Email exhazard siratc co uk Sira Certification Service is a service of Sira Test amp Certification Ltd sira Certification Service SCHEDULE EC TYPE EXAMINATION CERTIFICATE Sira 02ATEX2132X Re issued 15 September 2003 to allow report number R52A9102B to replace report number R52A9102A 13 DESCRIPTION OF EQUIPMENT The Model DSP Ex Automatic Dewpoint Meter is a portable hygrometer The meter indicates the moisture content of gases and displays the results in various units on a liquid crystal display The apparatus is supplied from six Duracell C size cells contained in two battery carriers
13. is facility ON enable gt A To turn it OFF disable press NOTE When the AUTO SHUT DOWN is ON the instrument will automatically switch OFF if no keys are pressed within a period of 5 minutes When the variables have been set to the desired positions press the key marked This fixes the settings within the instrument and on each subsequent start up these levels will be maintained The display will now be shown C Dewpoint or equivalent 2 2 Selecting Engineering Units To change the displayed engineering units from C Dewpoint to either F Dewpoint PPM V PPB V g m3 Ib MMSCF or PPM W use the following procedure a b Press the key marked ea and hold pressed for approximately 4 seconds The display will show the letters SU select units in the top right hand corner Subsequent presses of the key marked g will scroll the display through the options of engineering units available The order in which the engineering units will appear on the display and their definitions is as follows C DEWPOINT The temperature at which Condensation or Frost forms if the gas is cooled expressed in degrees centigrade It is important to note that the term DEWPOINT is comonly used to include frost point and all readings below 0 C are in fact measurements in equilibrium over ice F DEWPOINT As above but expressed in degrees Fahrenheit Page 3 PPM V The volume of water vapour per total volume of gas expr
14. screen will display PPM W Mol Wt X where X is any number between 0 and 99 If PPM W is the required unit of measurement and the gas to be measured does not appear on the installed list then the molecular weight of this gas should be installed by pressing the key marked a which indexes the number mol weight between 0 and 99 1 press 1 digit If the key da is pressed at 99 then the number reverts to 0 When the required gas or molecular weight has been selected press the key marked at this point the letters SG will disappear This installs the selected units into the instrument programme and the instrument will start up in these units at every subsequent start up Page 4 NOTE If when the enter key is pressed to select units in PPM W the display already shows the correct gas simply press again to confirm this setting Other units can be installed by reselecting and storing using the above procedure 3 Normal Operation In order to take moisture content readings of air or gas having pre selected the required units of measurement use the following procedure 1 2 3 4 Locate the instrument in a convenient position as close as is practical to the sample point and move the handle from its carrying position to allow clear operation of the telescopic measuring head NOTE The position of the handle is adjustable in 300 steps by pressing the two black buttons one at each pivot point and manu
15. strument Where flexible tube is to be used the preferred material is PTFE Teflon This offers a reasonable degree of flexibility and has good resistance to external moisture ingress The sample tube supplied with the instrument is ideally suited to this purpose Open the sample valve at the sample point to allow a small flow of air or gas through the system at atmospheric pressure The actual flow is unimportant as the measuring sensor is not flow sensitive but it is suggested that a flow of between 5 and 10 L min is an ideal compromise between minimum gas usage and system response speed Page 5 6 7 5 Allow the instrument and pipework to purge and then restrict the sample exhaust from the instrument with a finger This will cause the telescopic section of the measuring head to extend from the front panel of the instrument under the pressure of air or gas If there is insufficient gas pressure to extend the head grip the outer knurled section of the head and while twisting clockwise gently extend the head by pulling it out from the front panel while keeping the sample exhaust blocked When the head is fully extended remove the finger from the sample exhaust and allow the sample to flowthrough the measuring head The display will indicate the change in moisture content surrounding the sensor Observe the display and when there is no further change in reading the displayed value is the gas moisture content NOTE If th
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