Model 6020 Advanced Dewpoint Hygrometer User Manual
Contents
1. For example To change from a dewpoint C to a dewpoint F e Note Pressing the so key at any time reverts to the Hot key function back to the measurement display without saving any changes 13 1 2 Choosing Pressure Units The PUn it submenu within SEEuP allows the user to alter the units for the pressure parameters The choices are Pascal x 10 PA EJ psi gauge P59 bar gauge bHr 9 13 1 3 Choice of Temperature Units The EUn it submenu allows the user to alter the units for the temperature parameters The choices are F F C Fa 13 1 4 Entry of Pressure at Sensor The FSEn submenu allows entry of pressure at sensor 1931 Iss 2 03 14 HB ls lode 6020 i 13 1 5 Entry of Pressure at Display Pd SP allows entry of pressure at which to display the dewpoint 13 1 6 Entry of Standard Pressure P5Ed allows entry of standard pressure Default 101 3 x 10 Pa O psig O barg 13 1 7 Entry of Standard Temperature ESEd allows entry of standard temperature Default 60 F 15 56 C 13 1 8 Entry of Gas Type SAS allows entry of type of gas at sensor for ppm w calculations Air Har Argon Ar Hr Methane CH CHH Carbon Dioxide CO CO Hydrogen H He Nitrogen N ne Sulphur hexafluoride SFg SFB Custom molar mass UAL UE 13 1 9 Enabling and disabling the model for Natural Gas measurements nESRS requires a Yes or No response to turn on or off the Natural Gas correlation If Yes t2. Model 6020 Advanced De Trsremt User Manual English This manual should be kept with the Model 6020 Please read this manual carefully from the beginning You must observe the safety information on page 3 before installation Document Reference 1931 Issue 2 27 MARCH 2014 CEMR Alpha Moisture Systems Ltd QE model 6020 O C Contents Section 1 General Information 0 T 2 Safety Information m 3 User Interface and Controls m 4 Quick Start Guide DI 5 Outline Specification 6 5 1 Limits 6 5 2 Enclosure DIN Style 6 6 Installation 7 a 6 2 Electrical installation 4 7 Installing the air gas sampling system 9 7 1 Piping installation schematic 10 7 2 Piping schematic component index 10 11 8 Installing and commissioning the sensor 12 9 AutoCal Calibration Sensor Ranges up to 0 dewpoin 13 10 AutoCal Calibration Sensor Ranges up to 20 C dewpoint 11 Entering numerical data 12 Hotkeys a 12 1 Lock Hot keys using Panel Function 12 2 Units Hot key NONE 12 3 Alarms Hot keys u 13 Using the Model 6020 Setup Menu 13 1 Configuration Parameters s 13 1 1 Choosing Moisture Units 13 1 2 Choosing Pressure Units 13 1 3 Choice of Temperature Units 13 1 4 Entry of Pressure at Sensor 13 1 5 Entry of Pressure at Display ee 13 1 6 Entry of Standard Pressure
3. 12 3 or 13 4 11 To set up passwords see section 13 5 1931 Iss 2 03 14 aE mode 6020 ji 5 Outline Specification 5 1 Limits Moisture Range and Units limits Temperature Range Upper Lower C dewpoint 20 0 130 0 Electronics 10 C to 60 C F F dewpoint 68 0 202 0 Limited Sensor 10 C to 50 C P ppm v 23100 0 001 to Sensor 9 g m 17 0 001 range L Ib MMSCF 1000 0 001 ppm w for air 23100 0 001 5 2 Enclosure DIN Style Mounting flange 144 x 72 mm and enclosure extends 108 mm deep from front of mounting panel but not including cabling needs 1931 Iss 2 03 14 Imode 6020 i 6 Installation 6 1 Mechanical installation into a panel Make a cut out in the donor panel 138 0 x 68 0 mm DIN 43700 The maximum panel thickness is 8mm If an effective IP65 weatherproof seal is required the minimum recommended panel thickness is 2 5 mm Pass the instrument case through the cut out in the donor panel and attach the two retaining screws to the studs on either side of the case making use of the supplied gasket Tighten the retaining screws onto the back of the donor panel until the instrument is clamped securely in position The screws must be tightened sufficiently to affect a seal between the front of the donor panel and the back of the instrument bezel but never over tightened 6 2 Electrical installation Viewed from the rear and on the left is the moisture sensor input c
4. N lal model 6020 ji 14 Monitoring the System The system is designed to operate continuously with a minimum amount of operator input It is however advisable to inspect the sample loop periodically to ensure that the required flows are being maintained The number and type of items employed in the sample loop will determine what if any routine checks should be made If for instance a filter is used the filter element should be inspected periodically and changed when necessary The instrument should not require any routine maintenance but if any malfunction is suspected it is advisable to contact your local dealer Should it be necessary at any time or for whatever reason to change either the instrument or sensor it should be noted that the instrument and sensor are completely interchangeable 15 Error Messages Message Description sese Sensor or sensor cable is short circuited The current output will drive to 20 25 mA Please contact your local dealer rOn H Attempt was made to change displayed units or Alarm Setpoint when Hot Key settings editing is prevented by PANEL submenu Refer to Section 12 for more information RIDFF Attempt was made to enter alarm Hot key when alarm is switched off Error High priority unspecified error during value entry Limit a float of invalid subtype Set a float with invalid sign Set an invalid linearisation data point Failed save of linearisation data poin
5. correct password before continuing on to the top level Note 2 Most of the screens within the menu have an active 10 second timeout Therefore if no keys are pressed within this period the unit reverts automatically to normal operation In most cases where the 10 second timeout occurs changes will not have been saved Table 1 Setup Menu contents Configuration Contains submenus for choosing engineering units choice of gas types and whether sensor linearisation is employed Sensor Range Contains submenus to choose the Range of sensor and linearisation data points Analog output Contains submenus to allow the user to fully configure the Analog output Alarms Contains submenus to fully control behaviour of two independent alarms Communications Contains submenus for changing baud rate and address of the instrument s RS485 communication port Security Contains submenus to set up passwords to control or limit access certain features from unauthorised changes 1931 Iss 2 03 14 IX model 6020 O 13 1 Configuration Parameters 13 1 1 Choosing Moisture Units The Lin E5 submenu allows the user to alter the displayed units While Un 5 is displayed press the J key to enter the submenu The currently selected unit is displayed Select a different moisture unit by repeatedly pressing the key to scroll through each of the moisture units Press the 23 key to set the chosen moisture units
6. problems with access for maintenance and calibration It is for these reasons that we recommend that the sensor be installed in a bypass fast loop or total loss sample system where the sensor is accessible without interrupting the main process flow line 1931 Iss 2 03 14 IRE model 6020 C 7 1 Piping installation schematic Main Process Line The sample point should be on the upper surface of the horizontal pipe or from a vertical section of pipe wherever possible The sample tube should run upwards from the sample point If this is not possible then an inspection port or drain tap should be installed at the lowest point in the system 7 2 Piping schematic component index 1 2 3 Sample Isolation Valve This is a recommended item as it allows access to the sample system without interrupting the main process line Sample Tube This should be stainless steel for dry air or gas applications but copper or carbon steel can be used where wetter gases are to be measured If any section of the sample tube must be flexible then PTFE should be used In most cases 3mm OD 1 8 is sufficient as it provides good system response time within minimum flow 6mm OD 1 4 tube can be used where pressure drops across the 3mm tube are too high Filter Unit A filter unit is recommended when the samples are likely to contain particulate matter If the air gas sample contains heavy hydrocarbon c
7. smn 13 1 7 Entry of Standard Temperature 20 13 1 8 Entry of Gas Type 20 13 1 9 Enabling and disabling the model for Natural Gas measurements 20 13 1 10 Enabling and disabling selection of sensor linearisation 13 2 Sensor range 13 2 1 Choosin e Sensor Rang 13 2 2 Viewing Range End Points Hi Lo 13 2 3 Viewing linearisation data points 13 2 4 Viewing linearisation data points 13 2 5 Viewing the ADC values in measurement mode 13 3 Analogue output 13 4 Alarms n 13 5 Security Features 13 5 1 Panel submenu 13 5 2 Password to control access to Setup menus N 13 5 3 Password to control access to the linearised data points 13 5 4 Password to control access to Reset Command 13 5 5 Changing passwords 13 6 Reset x 13 7 Digital Communications 14 Monitoring the System 15 Error Messages Contact Information Appendices A Default instrument configuration BO Setup Menu diagram B1 Configuration Submenu diagram B2 Sensor Range diagram B3 Setup Menu Output Alarms Communications and Security diagram C Communications Protocol 1931 Iss 2 03 14 IR model 6020 O 1 General information The Model 6020 is the next level in online dewpoint hygrometry for multi species gases and natural gas With powerful functions and features available that allow the user to set detailed configurations and parameters for more continuous measurement control This makes the Model 6020 t
8. 0 Silver Sali 110 20 Purple 0 Pur 100 20 Purple 1 Pur 110 20 Purple 2 Pure 120 0 Purple 3 Pur 3 120 20 Purple 4 Pur 130 0 1931 Iss 2 03 14 IR model 6020 ji 13 2 2 Viewing Range End Points Hi Lo If the Model 6020 is setup to allow a linearization curve to be entered then pressing the key whilst AnFE message on the main display will move to a sub menu where the selected range H Lo and the curve fitting dALA points can be viewed by further presses of the key ESSE o HESS oS o GEES c BASSO The H Lo submenu allows the user to view the highest and lowest extremity of the currently selected range For example to view the highest extremity of the currently selected SILVER range 20 0 C Press key to view parameter s CHASE O H Jol 280 0 13 2 3 Viewing linearisation data points To view the 15 curve fitting cdAEA points parameters requires repeated pressing of the key and Ese key to return The secondary display shows the data point position number 0 1 2 3 etc and note it indicates this in a hexadecimal numerical presentation due to the display being one character wide Position Number 1 2 3 4 5 6 7 Secondary Display B fe 3 4 S b 9 10 11 12 13 14 15 8B S5 A jb L djE 00 The next message prompt after the H Lo dAEA will take you to the Password prompt PASS 13 2 4 Edit
9. 85 interface and cable are required All transmission is binary and is NOT ASCII characters A single instrument may be connected using the universal address of O Up to 32 separate instruments may be connected using addresses 1 to 32 NOT including the universal address of 0 The instrument is the slave and must be requested for data There is only one command that returns the process value in the units set in the secondary display Alarm state and a sensor short are returned in a 2 byte status word Baud rate and address are set from the front panel under 5485 submenu While 5485 is displayed press the key to enter the submenu The main display now displays Addr Use the key to select either Addr or bAUd then press the J key If the Addr option is selected the screen will display the current address value Use the amp keys to enter the new value Press the J key to set the new address Legal addresses are 1 to 32 Note Once the key is pressed to set the address or baud rate that value is committed and will not revert to the previous value even if the 10 second timeout occurs or the sse key is pressed If the bALId option is selected use the key to select the required baud rate Select between 9600 4800 2400 1200 Press the key to confirm selection Note Pressing the eso key reverts the instrument back to the 5485 screen Refer to Appendix C for communications protocol 1931 Iss 2 03 14
10. agram see section 7 1 shows all components that could be used in a dry gas measurement application Not all the items shown will be required for every installation Care should be taken to ensure that the sample presented to the measuring sensor is not contaminated with any component that will damage contaminate or affect the sensor in a way that will impair the system accuracy It is strongly recommended that the sample should not contain particulate matter oil or other heavy hydrocarbon condensate If these components contaminate the sample system and or the measuring sensor the system response time will be lengthened although the sensor calibration will not be effected The sample must not contain ammonia chlorine ozone or any wet acid vapours or liquids as these will permanently damage the sensor and impair calibration accuracy The flow rate although not critical to the sensor measurement should be low enough to avoid abrasion to the sensor surface without being so low as to extend the system response time to an unacceptable level In general a flow rate of between 2 and 3 litres min at NTP will give the right balance The sensor is a variable capacitor which is directly affected by changes in partial pressure of water vapour These changes that are proportional to the dew frost point temperature are displayed on the instrument indicator The measuring sensor can be installed directly into the process line but this does create
11. d to this output must only be connected to signals complying with the requirements for Safety Extra Low Voltage SELV circuits The output however benefits from galvanic isolation and segregation by isolated electrical circuits The analogue output is a current output It is always enabled and care should be exercised therefore to ensure that during installation the two terminals are not shorted and have a load attached more than 200 Q for optimum performance By factory default the output is linear to match the selected units OUTPUT Linear in C OUTPUT Linear in ppm v C ppm v ppm v C 20 T 1000 1000 20 40 500 25 0 5 0 5 80 Low Med High Low Med High Moisture Content Moisture Content Also linear in g m or Ib MMSCF 1931 Iss 2 03 14 23 Also linear in F Imode 6020 O C For example For a blue sensor scaled from 80 C to 20 C dewpoint then the analogue output will be at its minimum when the reading is at 80 C dewpoint and at its maximum when the reading is at 20 C dewpoint Furthermore the factory default configuration is that the output current ranges from 4 to 20 mA Therefore using the above example the port will be providing 4 mA when the instrument display is at 80 C dewpoint CED 3 9 S GJ And the output provides 20 mA when the display is at 20 C dewpoint E ooog If a sensor is detected as short circuit the
12. ed Cable Compensation Potentiometer Connector C3 There are three banks of wiring connections points organised into groups named here as C1 C2 and C3 Connector C1 Analogue Output and Digital Communications Port e On first two pins on left is the 4 20 mA Analogue Output Onthelastthree pins is the RS485 Digital Communications port Connector C2 Alarms Two independent SPCO volt free contacts rated 104 240 VAC Connector C3 Power Supply Universal 90 250 VAC 50 60 Hz or 24 VDC version dependant on factory set option Important Notes for both AC and DC powered units e The power supply to the instrument must be protected by a 1A fuse e A local isolation switch is advisable for ease of isolation during maintenance to reduce the possibility of electric shock or damage to the instrument The power supply ground GND terminal must be wired to a suitable permanent ground point e The supplied ferrite bead must be installed on the power supply cable approximately 50 mm from the connector using the supplied tool on the rear of the instrument e The power supply wires are retained by screws and care should be taken to ensure that the exposed section of the wire is fully inserted and that no loose strands are exposed e Cables should to be properly supported and segregated 1931 Iss 2 03 14 la Ml model 6020 ji 7 Installing the air gas sampling system The piping installation schematic di
13. enus to fully control behaviour of two independent alarms Defaults are e Both alarms setpoints are set to 0 C Both alarms are set to trigger when rising above the upper limit Therelays are de energised in a non event state e The alarms events are not latching e The alarm hysteresis is set to 0 1 C or the equivalent in other units Communications Contains submenus for changing baud rate and address of the instrument s RS485 communication port Defaults are e The instrument will communicate with a baud rate of 9600 e The address will be 00 Security Contains submenus to set up passwords to control or limit access certain features from unauthorised changes Defaults are e The setup password is reset to 0000 and as such is not requested unless changed Other security password codes are defaulted and on a reset set to 9000 e Panel submenu is enabled allowing changes via hot keys 1931 Iss 2 03 14 IX Model 6020 Appendix C Communications Protocol RS485 REQUEST Protocol as seen by Model 6020 Byte Description O first 255 1 255 2 Preamble 255 3 255 4 255 5 Master to Slave 2 6 Address 0 to 32 7 Command 24 8 Data Length 1 9 Data Bytes 0 10 last Checksum 27 8 bit arithmetic XOR of byte 5 onwards RS485 REPLY Protocol as seen by Model 6020 Byte Description O
14. er liquids Cleaning Disconnect the power supply first To maintain the instrument never use harsh abrasive cleaners or solvents Wipe the instrument only with a soft cloth slightly dampened with warm soapy water Maintenance Risk of damage to the Sensor Always ensure that the Model 6020 is switched off before removing or replacing a Sensor By not doing so can result in short circuit damage to the Sensor 1931 Iss 2 03 14 la M model 6020 O O 3 User Interface and Controls Consists of a membrane keyboard with four user input keys and also four visual indication elements or windows the primary five character LED a single character secondary LED for units indication two alarm LEDs and the access cover to the AutoCal potentiometer Secondary Alarm Display Indicators Primary Display User Input and m Hot Keys MENU UNITS ALI AL2 eU AUTOCAL O MODEL 6020 DEWPOINT HYGROMETER AutoCal potentiometer In normal operation the Model 6020 will display the current moisture value of the connected sensor in the Primary Display The engineering units are indicated in the Secondary Display The Alarm LED s AL 1 amp AL 2 will light RED whenever an alarm condition occurs and only turn off when the alarm condition clears unless the alarms are latched Remote signalling of an alarm condition is provided by separate internal changeover re lays that trigger at the same time as the LED s 1931 Is
15. erical value has to be entered into the Model 6020 the following procedure should be used The right most character of the main display flashes to indicate it is active for editing If required press the D key repeatedly to select the number or sign which needs to change The eso key allows the user to leave a part of the menu without changing any settings Use the Y key to change the required number between 0 and 9 P Bug eC Tan C BUD OC BOO Pressing the key at any point sets the numerical value Continue this process until all characters are entered 14 1931 Iss 2 03 14 IR model 6020 ji In the case of numbers associated with units which use non integer numbers such as Ib MMSCF g m or ppm w pressing the key repeatedly beyond the fifth character makes the decimal point flashing and therefore active For example in order to change the alarm level from 0 853 to 8 43 g m 9 853 7 853 FOGHS O BHL UL EHI GREHI o LL ui a Use the Y key to position the decimal point in the required position Pressing the I key at any point confirms the numerical value The numbers associated with use of C amp F units are fixed to 1 decimal place e g 43 8 C 1931 Iss 2 03 14 Imode 6020 ji 12 Hotkeys 12 1 Lock Hot keys using Panel Function There is an option to restrict the Hot keys so that Units or Alarms may only be inspected rather
16. first 255 1 255 2 Preamble 255 3 255 4 255 5 Slave to Master 6 6 Return Address 128 for Address 0 8 bit arithmetic OR of address with 128 7 Command 24 8 Data Len 6 9 Seats bits 15 8 10 bits 7 0 11 Process Value 12 Single Precision 4 Byte Float 13 Data IEEE 754 Format 14 Big endian first byte msb 15 last Checksum 8 bit arithmetic XOR of byte 5 onwards 1931 Iss 2 03 14 IgH Model 6020 REPLY Status Byte Description 15 first ms Not defined 12 11 Alarm 2 user to clear 10 Alarm 1 user to clear 9 Alarm 2 8 Alarm 1 7 Not defined 6 Sensor short 5 4 3 i 2 Not defined 1 0 last Is Example of communication using universal of 0 Request message sent 255 to Model 6020 0 Reply message from Model 6020 255 255 255 255 255 6 128 24 6 0 0 lt 4 bytes of single float gt lt 1 byte of checksum gt 1931 Iss 2 03 14 lal mode 6020 i Contact Information Qmm Head Office Alpha Moisture Systems 96 City Road Bradford West Yorkshire BD8 8ES United Kingdom Location Tel 44 0 1274 733100 Fax 44 0 1274 733200 Email info amsystems co uk Web www dew point com Office Opening Hours Monday Thursday 8 30am 5 30pm GMT Friday 8 30am 5 00pm GMT Notes 1931 Iss 2 03 14
17. he advanced choice with the following features and benefits e Large easy to read 5 digit LED display e Four button membrane keypad e Six selectable engineering units e Three hot keys to enable rapid access e Two visual alarms LEDS e AutoCal Automatic Calibration function to perform periodic auto calibration of the sensor e Fully controllable linear selectable 0 20mA or 4 20mA output for process retransmission e RS485 port for digital output e Option for external alarms e User controllable password system e AC or DC powered models available Component list of Model 6020 Advanced Dewpoint Hygrometer System e Model 6020 panel mounted instrument e Three connectors for wiring e Ferrite Bead for power cable e Mounting Gasket e 2panelretaining screws e Screwdriver e User Manual e Certificate of Calibration e Declaration of Conformity e Sensor Cable e Sensor Optional extras e Sensor Holder 1931 Iss 2 03 14 la M model 6020 HI 2 Safety Information and Warnings A These safety instructions and guidelines must be followed The Model 6020 is designed to be connected to hazardous electric voltages 240V The power supply must be protected by a 1 amp fuse The Model 6020 must be earthed Check to establish that all wiring and connections are not damaged If damage is observed to any electrical wiring or damage to the apparatus they must not be connected to the power supply but returned to the supplier for
18. hen the sensor linearisation follows a modified curve defined in the Natural Gas correlation If No the sensor follows the ideal gas linearisation 13 1 10 Enabling and disabling selection of sensor linearisation L in requires a Yes or No response If Yes then the instrument linearisation follows a curve defined in the Linearisation Correction Table If No then the instrument follows the natural response of the sensor 1931 Iss 2 03 14 1B model 6020 13 2 Sensor Range The rAnSE option allows the user to select the required sensor range 13 2 1 Choosing the Sensor Range This option is used to match the Model 6020 to the sensor connected to the unit For example the change from a BLUE to a SILVER sensor requires that the Model 6020 rAnSE option 5 iL is selected While AnSE is displayed press the J key to enter the submenu To return cAnSE a bb CAnSOD O Ga The display now shows the currently selected sensor range e g BLUE Use the key to scroll through the options until the required range is displayed e g SILVER Press the key to select the new range Note Pressing the ese key at any time reverts to the HnJE message prompt screen without saving any changes Dew Point Range C Minimum Maximum Colour n Lo Hi Grey ge 80 0 Purple Pur 100 0 Red rEd 80 20 Blue bLu 80 20 Yellow HEL 60
19. here or returned to the process line as discussed above 1931 Iss 2 03 14 IX model 6020 ji 8 Installing and commissioning the sensor It is advisable to carry out an initial purge routine of the sample loop before installing the sensor This is to remove the possibility of sensor damage on start up Note Before any AutoCal procedures are carried out after installation you must first set the Zero on the Cable Potentiometer sited on the rear of the Model 6020 see section 6 2 Refer to the sample system schematic in section 7 1 Open the inlet isolation valve slowly until a small flow of air gas at atmospheric pressure flows through the inlet pipe work to the sensor holder exhausting through the sensor entry port of the sensor holder Allow this purge to continue for about 15 to 20 minutes to remove any residual moisture from the sample pipe work and components Close the inlet isolation valve and install the sensor into the sensor holder Locate and coaxial cable in positioned on the sensor Open the inlet valve slowly by opening all valves after the sensor holder allow a low pressure purge through the whole sample system Note If a closed by pass loop is installed this section of the procedure is not possible Set the required flows within the sample loop This completes the installation and commissioning but on initial start up it could take several hours for the system to reach equilibrium The Model 6020 will
20. ing linearisation data points When the L in password is successfully entered the user can enter new calibration data The user will then need to press the key 5 times to return back to the dAEH submenu Press the key to the data point position and enter the new data by using the key and the v key Refer to Section 11 and Appendix B2 An invalid data entry is shown by blinking of the secondary display 1931 Iss 2 03 14 aE Model 6020 ji Warning We strongly recommend that you record the current value before you enter a new value in the event that you have to re enter the original data To save a new value press the return key repeatedly until 77000 are displayed for 1 second and the word dRER is shown At this point the new data will be saved automatically Pressing the eso escape key or if the Model 6020 Times Out your new data values will not be saved 13 2 5 Viewing the ADC values in measurement mode Additionally an option is also enabled by this L in password which for the extent of the powered on state will display in measurement mode the instrument s current analogue to digital converter count ADC value via a YES no choice after the main display message prompt Adc This feature may be useful for calibration laboratory work 13 3 Analogue output The Model 6020 features an analogue output port which the user may use to retransmit the moisture reading to another system The wiring connecte
21. n the current output will rise to 20 25 mA J 9 S GJ 1931 Iss 2 03 14 N ls IgE model 6020 If required there is facility to change the output current calibration points at either end of the scale to attain a more focused signal For example Moving the lower scale point from 80 C dewpoint to 60 C may be desirable and can be achieved by the following entry to the instrument configuration OMERE 3 I DU hh To return E eH Jets a Dna Gait 1931 Iss 2 03 14 Imode 6020 O It is also possible to select a 0 20mA output range instead of the standard 4 20mA To return MUERE esc Selecting this range is useful to provide a convenient method of providing a 0 5 Vdc voltage output to the remote equipment when used in conjuction with a suitable 250 Q resistor 0 20mA output range 0 5 Vdc analog input 2509 1931 Iss 2 03 14 Imode 6020 O 13 4 Alarms The two independent alarms options 1 and 2 allow the user to setup configurable alarm events by configuring the trip points direction of trigger relay enable energised on event command latching on event command and hysteresis While AL or ALE are displayed press the key to enter the submenu The main display indicates the trip point 5SEEPE Use the key to select the required function and then press the key Note Pressing the e
22. now indicate the dewpoint of the air gas surrounding the sensor and the analogue output will be giving mA signals proportional to the indicated dewpoint 1931 Iss 2 03 14 IA model 6020 ji _ 9 AutoCal Calibration Sensor Ranges up to 0 C dewpoint The system relies on the fact that each sensor is designed to give no further increase in reading when it reaches its maximum moisture level This means that for instance the Silver Spot or Red Spot sensor will read 20 C Dewpoint when it is exposed to gas at 20 C Dewpoint but will continue to read 20 C Dewpoint when it is exposed to wetter gas The system can therefore be calibrated very simply by exposing the sensor to anything wetter than 20 C Dewpoint and adjusting the reading to that point on the display For the Grey Spot Sensor the maximum level is 0 C dewpoint and the same principle applies but the gas must be above O C In practice an AutoCal is performed as follows 1 Ensure the Model 6020 is powered up and displaying the moisture content in C Dewpoint 2 Remove the sensor from the sensor holder and expose it to ambient conditions for at least 1 minute 3 Checkthe Model 6020 reading It should display the maximum level of Dew point for the instrument i e 20 C for Red and 0 C for Grey 4 Ifthe unit is reading incorrectly then use a small screwdriver to turn the Autocal potentiometer found on the front panel of the instrument under the knurled cap clockwi
23. ondensate the filter must be of the coalescing type with a drain The filter unit should be positioned as close to the sample point as practical 1931 Iss 2 03 14 la M model 6020 NN 4 Pressure Reduction Valve or Pressure Regulator If the sample is to be measured at atmospheric pressure then the valve 4A should be fitted and 4B omitted from the system If the sample is to be measured at full line pressure and the exhaust vented to atmosphere then valve 4B should be fitted and 4A omitted from the system If measurements are to be taken at full line pressure and the sample is to be returned to a part of the main line or a vent which is at a pressure higher than atmospheric and the input to that line needs a controlled pressure then both 4A and 4B will be required 5 Sample Pressure Gauge This is not a critical part of the moisture measurement but may be required if Dew Frost point measurements are to be made at higher than atmospheric pressure 6 Measuring Sensor 7 Sensor Holder 8 Desiccant Chamber This item is required when the sampling is to be intermittent When installed it prevents the ingress of wet air to the sample system while the sample is not flowing improving the response time 9 Flow Control Valve This can be a separate item or combined with the flow indicator 10 Flow Indicator The recommended sample flow is 2 to 3 litres min at NTP 11 Sample Exhaust The exhaust can be vented to atmosp
24. onnector which is a panel mounted BNC Just below it is a cable compensation adjustment potentiometer labelled ZERO The ZERO adjustment is used where long cable lengths are fitted to the instrument and only used at the commissioning stage of the installation Normally when the cable is attached and laid in the operating position but the sensor disconnected the instrument display should read the lowest value of the selected range If it does not the ZERO can be adjusted to compensate for any raised value induced by the cable Care should be taken to ensure accurate adjustment or the accuracy of the system may be impaired Only very small adjustments should be necessary and the procedure is as follows Insert the small screwdriver to engage with the ZERO potentiometer and slowly adjust the potentiometer until the display reads the lowest value of the selected range It is important to note that the display value will not indicate below the lowest value therefore care must be taken to ensure that adjustment drops as soon as the lowest value is reached Also see illustration Figure 1 on the next page for wiring details 1931 Iss 2 03 14 IA model 6020 O O Figure 1 Coaxial O OO O Sensor Connection Alarm 1 o O Alarm 2 AC Wiring DC Wiring AC Power 90 250V 50 60Hz 10VA 3 A BCom NO C NCNOCNC L N GND 4 20mA GND Output Connector C1 Connector C2 L Fus
25. r the security password used to protect the ESEE command and is entered on entry to reset submenu The default password for this 9000 1931 Iss 2 03 14 27 IA model 6020 ji 13 5 5 Changing passwords To change any of these passwords in the 5EEuP menu navigate using scroll to the PASS feature in the SEtLP menu While PASS is displayed press the key to enter the submenu Use scroll key to select which of the three passwords SEELP L in and rESEL you wish to change and press return key 3 The main display now indicates 0000 Note is indicated on the secondary display to indicate you should be entering the current password using the Y amp keys Note is indicated on the secondary display to indicate you are entering the new password using the Y C amp keys Note The passwords used are made of four integers and does not use the For example To change the password to limit access to the linearisation data points from the default 9000 to 0090 HESS o CER cao 3 4 To return Note Pressing the se key at any time will exit the submenu without committing any changes 1931 Iss 2 03 14 Imode 6020 ji 13 6 Reset The rESEE submenu allows the user to reset the instrument back to the default settings 13 7 Digital Communication The 5485 submenu allows the user to set the address and baud rate used in communicating with a PC using RS485 communications A RS4
26. rectification Before powering up the unit check that the connecting plugs at the back of the unit have been wired correctly Observe the wiring diagrams in section 6 2 Figure 1 Do not connect the Model 6020 to the power supply until it is in a permanent position Risk of electric shock Do not open any part of the Model 6020 whilst connected to the power supply Remove the power supply and isolate before any maintenance is carried out The power supply terminals and associated internal circuitry are isolated from all other parts of the equipment in accordance with EN61010 1 for connection to a category Il supply pollution degree2 Any terminals or wiring connected to the input or output which are accessible in normal operation must only be connected to signals complying with the requirements for Safety Extra Low Voltage SELV circuits Hazardous voltages may be present on instrument terminals The equipment must be installed by suitably qualified personnel and the instrument must be mounted in a position that provides protection behind the panel to at least IP20 Note The instrument contains no user serviceable parts Ignoring this safety information can result in severe personal injury and or damage to the unit The product specifications must not be exceeded at anytime as this may cause damage to the apparatus or cause risk of damage or fire Ensure that the Model 6020 does not come into direct contact with water or any oth
27. s 2 03 14 la M model 6020 n 4 Quick Start Guide Note Your instrument has been calibrated by Alpha Moisture Systems to your specification To get started quickly there is no need to go through all the menus on the Model 6020 at this stage Follow these step by step instructions below for a fast set up and quick start to measuring Unpack the Control Unit and Sensor only when they are ready to install Read the safety instructions in section 2 Make a location for the Model 6020 For dimensions see section 6 1 Make ready and seal all pipework for sampling Unpack and wire up the Model 6020 display unit see section 6 2 DO NOT power up at this stage Unpack and very carefully insert the sensor into the sensor holder and connect to the Model 6020 display unit 7 Purge the gas to be sampled through the pipework and sensor holder see sections 7 1 and 7 2 for full details 8 Re check all connections and wiring NOW power up the Model 6020 8 The screen will now look like this for example 9 Ifthe display is still changing allow this to settle before taking final reading wee Ne m Note Time to settle can vary between a few minutes and several hours dependant on the condition of the sample tubing on start up Time can be affected by for example temperature pressure sample moisture content and other factors Take a final reading when the display is static 10 If alarms are to be set at this stage see section
28. se to increase the reading wetter or anticlockwise to decrease it dryer 10 AutoCal Calibration Sensor Ranges up to 20 C dewpoint In order to calibrate a 20 C Sensors it is necessary to measure the ambient air Dewpoint by some other method Careful use of a sling or whirling hygrometer can achieve accurate results or a cooled mirror device can be used The following procedure should be used 1 Ensure the Model 6020 is powered up and displaying the moisture content in C Dewpoint 2 Remove the sensor from the sensor holder and expose it to ambient conditions for at least 1 minute 3 Compare the reading of the Model 6020 in the ambient air against the actual moisture level obtained by another method Turn the Autocal potentiometer found on the front panel of the instrument under the knurled cap using a small screwdriver clockwise to increase the reading wetter or anticlockwise to decrease it dryer 1931 Iss 2 03 14 13 la M Model 6020 O C 11 Entering numerical data AL1 AL2 MENU UNITS AL1 AL2 DI v AUTOCAL O MODEL 6020 DEWPOINT HYGROMETER Returns the user to the previous screen without changing any variables Used to decrease the selected digit when setting a numerical variable Used to select the next digit when setting a numerical variable or to scroll through the options available Used to confirm a numerical variable or the selection of a chosen option When a num
29. so key reverts back to the display AL or AL Z message screen The following functions can be performed SEEPE Enter the alarm set point EHPE Select if the alarm is to activate on a rising signal H falling signal Lo or OFF rELAH Select if the relays are Energised En or de energised dE En LHEch Set if the alarm is Latch 4E5 or not latching no H4SE Enter the hysteresis value Note Pressing the key sets any of the alarm parameter will not revert to the previous value even if the 10 second timeout occurs or the se key 13 5 Security Features There are options to secure features and settings 13 5 1 Panel Submenu The FANEL option allows the user to restrict the functions of the front panel Hot keys If the on option is selected the Hot keys are unrestricted While PAnEL is displayed press the key to enter the submenu The main display now displays an or aFF Use the key to select on or oFF Press the key to confirm selection 13 5 2 Password to control access to Setup menus The user may set a password to secure access to the SELLIP menus The default password for this 2000 13 5 3 Password to control access to the linearised data points There is additionally a password which controls access to being able to edit the 15 data points parameters contained in L in submenu The default password for this 9000 13 5 4 Password to control access to Reset Command The password on the ESEF allows the user to alte
30. t Please contact Sales for advice QuEr Attempted to adjust a value over its high range calculation limit UndEr Attempted to adjust a value under its low range calculation limit 5PRn Set loop current range with Hi Lo end points reversed SPAnO Set loop current range with Hi Lo end points too close together 1931 Iss 2 03 14 IgE Model 6020 Appendices 1931 Iss 2 03 14 1 Model 6020 Appendix A Default instrument configuration Configuration Contains submenus for choosing engineering units choice of gas types and whether sensor linearisation is employed Defaults are e the moisture content in C dewpoint the ppm w calculations use the gas type as Air the model for natural gas is disabled the pressure units are bar g the temperature units are C sensor linearisation data points are enabled the standard temperature and pressures are reset to 15 56 C 60 F and 0 barg Sensor Range Analog output Contains submenus to choose the range of sensor and entry of linearisation data points Defaults are e The sensor range is GREY The viewing of the instrument s internal ACU readings are not enabled Contains submenus to allow the user to fully configure the analog output Defaults are e Output range is set to 4 20mA Output range is set to the full span of the selected moisture range e g 4 mA 80 C and 20 mA 0 C for GREY sensor range Alarms Contains subm
31. than adjusted using the Hot keys If this is the case when an attempt is made to change the parameter then the user is presented with the message rUn IH to indicate that the parameter is Read Only The Panel option allows the user to restrict the functions of the front panel Hot keys If the OFF option is selected the Hot keys are RESTRICTED to Read Only For example While PANEL is displayed press the key to enter the subroutine The main display will now display On or OFF Use the key to select Un or OFF PARE OO eBFF o PRaEL Press the key to confirm selection 12 2 Units Hot key The Y Units Hot key allows the user to view and alter the displayed units To review the moisture in alternative units press the Y Units key for longer than 3 seconds The main display will then show the message Lin 5 Press the key to select a different moisture unit in the flashing secondary display by repeatedly pressing the O key to scroll through the current moisture level in each of the moisture units Press the key to select the chosen moisture units and it will stop flashing For example To change from a dewpoint C to a dewpoint F While Un 5 is displayed press the key to enter the subroutine The secondary display now shows the unit type omang flashing Use the key to scroll through to the next unit 4 n type is displayed e g F 3 To return Press the 2 3 ke
32. y to select the new unit 22 08 Note Pressing the se key at any time escapes to the hot key function and returns to the measurement display without saving any changes 1931 Iss 2 03 14 IX model 6020 O 12 3 Alarms Hot keys The two alarm Hot keys AL 1 and AL 2 allow the user to review and set the Alarm trigger points To review the alarm trip point press the AL1 or 23 AL2 key momentarily The primary display will show the set trip point for 1 second before reverting back to the moisture reading To change the trip point press and hold the AL1 or C3 AL2 keys for longer than 3 seconds The main display will then show the message AL or AL 2 Press the key to select Alarm in the flashing main display by repeatedly pressing the Y and keys to scroll through and adjust the alarm setting Press the 2 key to select the chosen alarm setting 1931 Iss 2 03 14 lal model 6020 O C 13 Using the Model 6020 Setup Menu To enter the Setup Menu press and hold the Ese key for 3 seconds This displays the 5EEWP message on the main display Press the key takes the user to the top of the first item in the Setup menu structure that being either ConF9 or rAnSE depending on how the instrument is configured Press d hold mit DB e GERI seconds 3 To return OR esc Fanes Note 1 If the user has set a setup password then the user is prompted to enter the
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