Easidew Online Dew-Point Hygrometer User`s Manual
Contents
1. 3 Press the X key twice and the display will flash between ConF and Alr1 4 Press the SET key twice to display Alt1 5 Press the X key once to display a flashing 4 digit number For the Alarm 1 default setting this will be 0001 6 Press the X key once to change the display to 0000 7 Press the SET key to accept the new value The default setting for Alarm 1 is now reversed 8 Either press the P key twice to return to the main display or press the P key once followed by the key to move to the Alr2 setting sequence from step 4 above To reverse the switching logic for Alarm 2 ONLY proceed as follows Press the P key once and the display will read tECH Press the SET key and the display will flash between ConF and PinP Press the X key three times and the display will flash between ConF and Alr2 Press the SET key twice to display Alt2 Press the X key once to display a flashing 4 digit number For the Alarm 2 default setting this will be 0000 Press the X key once to change the display to 0001 Press the SET key to store the new value Press the P key twice to return to the main display The default setting for Alarm 2 is now reversed Kahn Instruments 27 Easidew Online User s Manual Main Display Z OPERATION L L L 3 Ace LT x IU CJ m nu ajadsgeisl Qc I I I 4 I 1 L 4 Cc Change Alarm 2 Switching Logic wa um um mm uma ma ma mm mm ay m UE2. Lont iLOn I pi 1 A mm h my ag x2 L L L J I L L J C 7 Bg p e JR ISI m 5 m L eo Conk R r mmm d 888 March 2014 Display Main Change Alarm Switching Logic Main Display Figure 23 888 28 OPERATION Easidew Online User s Manual 3 3 3 Alarm Level Set Up The alarm set point levels are set up from the program menu as follows to exit to the main display without saving any new Settings press the P key Figure 24 shows the operational key sequence To set up both alarm set points 1 Press the SET key once ALr1 will be displayed To set Alarm 2 only press the SET key twice and follow the Alarm 2 branch instead Press the X key to display the flashing current Alarm 1 set point 20 C in this example Use the X and X keys to set the required value 25 5 C in this example Press the SET key once to store the new or existing value for Alarm 1 and to enter the set up menu for Alarm 2 ALr2 To exit to the main display without changing Alarm 2 set point levels press the P key Press the X key to display the flashing current Alarm 2 set point 40 C in this example Use the amp and amp keys to set the required value 50 C in this example Press the SET key on
3. came emmm Set Address se w between 0001 and 0247 ale Jak Set baud IE 1200 2400 4800 9600 19200 0 1 2 3 4 ae fu E Set up Data Communications Parameters Figure 29 37 Kahn Instruments OPERATION Easidew Online User s Manual 3 6 Monitor Reading the Displayed Value Using Modbus RTU Over RS232 It is possible to communicate with the online monitor using Modbus RTU over RS232 The monitor has a three pin serial port connection on the back the required cable can be supplied by Kahn see Appendix B for set up information To read the value displayed on the monitor a byte array must be created containing the following bytes Reg Reg Number Number Seien Address Address of Reg of Reg High Low High Low Send this to the instrument with the correct delays between characters After a few seconds the instrument will send back the following response Instrument Number of Display Display Address bytes High Low Data MSB 256 Data LSB 0 256 103 103 This code written in c can be used to convert the 103 into a real dew point value or 10 3 float ConvertToReal int Value convert dew point value to real dew point result float result declaration if Value gt 32767 Value Value 65536 convert to negative number result float Value 10 0 divide number by 10 to convert to float return result return real value 3
4. 77 77 m SRA x 1 oo J SOURCE O 3EEXLBLU BLUE Y BLUE SCREEN MIT RED GND RED RED POWER lt 2 4 POWER VIEW ON REAR OF CONNECTOR SCALE 2 1 Figure 16 Wiring Connections Always connect the 4 20 mA return signal to a suitable load see Figure 16 before the power is applied Without this connection the transmitter may be damaged if allowed to operate for prolonged periods 2 11 Electrical Schematic NOTE The screen shield should be connected for maximum performance and to avoid interference Supply Max Load 12V Min Screen 250R 12V 500R 24V 28V Max Shield Figure 17 2 Wire Connection Diagram Kahn Instruments 19 INSTALLATION Easidew Online User s Manual 2 11 1 Electrical Boundaries Resistance ohms 12 14 16 18 20 22 24 26 28 Supply Voltage Figure 18 Maximum Load of Easidew Including Cable Resistance 2 12 Transmitter Cable Connection 2 12 1 Transmitter Connections NOTE The following procedure can be followed for transmitters mounted in the sample block or directly mounted in the pipeline When installing the connector and to insure that full ingress protection is achieved the securing screw with the O ring and washer must be tightened to a minimum torque setting of 2 5 ft lbs 3 4 Nm O ring and washer Figure 19 Connector Installation 20 March 2014 Easidew Online User s Manual INSTALLATION 2
5. For temporary applications or where stainless steel tubing is not practical use high quality thick walled PTFE tubing 40 March 2014 Easidew Online User s Manual MAINTENANCE 4 2 4 2 1 Complexity avoidance tee pieces in line couplings etc Sample tubing should ideally be specially designed for each application rather than adapted from that previously installed for another application Dead space in sample lines increases response time by holding water molecules which are more slowly released to the passing gas sample Sample Gas Selection Generally if the sample gas in conjunction with water vapor is not corrosive to base metals it will be suitable for measurement by the Easidew Online system Gases containing entrained solids should be filtered before application to the sample block Care should be taken with gas mixtures containing potentially condensable components in addition to water vapor e g oil to insure that only water vapor is present in the sample Maintenance and Calibration Routine maintenance of the Easidew Online Hygrometer is confined to regular re calibration For most applications annual re calibration insures that the stated accuracy of the Easidew Online Hygrometer is maintained Specialized calibration instrumentation is required to calibrate the transmitter and a true calibration can only be performed by exposure of the dew point sensor to a reference gas of known dew poin
6. an appropriate power supply plug brown lead to live supply terminal blue lead to neutral supply terminal 5 Check that the wiring has been completed correctly before connecting to a power supply 12 March 2014 Easidew Online User s Manual INSTALLATION 2 8 2 DC Power Supply Input Optional Connect the DC power supply to the monitor as shown in Figure 11 Refer also to Table 3 which gives a summary of all the connections to the rear panel of the monitor Monitor viewed from underneath Figure 11 DC Power Supply Connections 1 Insure that no power is connected to the power lead 2 Connectthe blue white US standard lead 2 to terminal 23 on the rear panel of the monitor 3 Connect the brown black US standard lead 3 to terminal 24 on the rear panel of the monitor 4 Strip back the insulation on the free end of the power cable and wire to an appropriate power supply plug brown lead to positive supply terminal blue lead to negative supply terminal 5 Check that the wiring has been completed correctly before connecting to a 24 V power supply Kahn Instruments 13 INSTALLATION Easidew Online User s Manual 2 8 3 Preliminary System Test Before wiring the external signal outputs and the transmitter current loop open perform a system check as follows 1 Switch off and disconnect the power supply 2 Connect to an AC or DC supply and switch the supply ON The mo
7. is converted to a real time analog dew point temperature reading by the monitor If data logging is required the monitor will need to be connected to a suitable host and temperature readings extracted via the RS232 interface The gas flow through the sample block must be controlled outside the instrument typically by means of a needle valve located in the sample gas input line 24 March 2014 Easidew Online User s Manual OPERATION 3 2 Preparation For Operation 3 2 1 First Time Operation To commence operation proceed as follows 1 Check that electrical power supply and the relevant analog and alarm outputs are connected to external systems as required and as described in Sections 2 8 and 2 13 2 Check that the gas sample flow rate through the sample block or the pipeline in which the transmitter is located is within the operational limits Adjust any external flow control valves located in the gas sample input line to the instrument to achieve required flow rate 3 Switch on the power supply to the instrument The instrument display will now come on typically showing the default parameters and units as detailed in Figure 22 The instrument is now operational and after a few seconds in which all the segments of the display are tested the monitor will display the measured dew point temperature as a steady reading within the range 148 to 68 Fdp 100 to 20 Cdp or 0 to 3000 ppm depending upon how the instru
8. method of connection is shown in Figure 33 and the following items will be required these are not supplied with the Easidew system Matching connector for monitor output port Screened RS232 communications cable max length permitted 40ft 12m 9 pin D Type RS232 connector Tx Rx GND 9 Pin D Type Connector Process Indicator Rear Panel Figure 33 RS232 Connections 1 Strip both ends of the communications cable to expose the individual cable cores and the cable screen 2 Trim off the cable screening at the monitor end 3 Connect the Tx Rx and ground GND cable cores to the monitor connector as shown 4 On the 9 pin D type PC connector connect the Tx line to pin 3 the Rx line to Pin 2 and the GND connection to Pin 5 Connect the Screen to Pin 5 and or the frame of the connector 5 Check that the cable wiring has been completed correctly 48 March 2014 Easidew Online User s Manual Appendix C UL Certification Kahn Instruments APPENDIX C APPENDIX C Easidew Online User s Manual Appendix C UL Certification Below are listed the requirements of UL Certification Standards Temperature Maximum Relative Humidity Power Supply Source Pollution Degree UL 61010 1 2nd edition 2005 07 22 Electrical Equipment for Measurement control and laboratory use Part 1 General requirements CAN CSA C22 2 No 61010 1 2nd edition 2004 07 Electrical Equip
9. 12 2 Monitor Connection Connect the transmitter cable to the monitor as shown below Monitor viewed from above Figure 20 Transmitter Connections 1 Connect the blue wire 2 of the transmitter cable to terminal 1 on the monitor 1 2 Connect the green wire 3 of the transmitter cable to terminal 3 on the monitor 3 Connect the red wire 4 of the transmitter cable to terminal 4 on the monitor 4 Check that the transmitter cable wiring has been completed correctly Kahn Instruments 21 INSTALLATION Easidew Online User s Manual 2 13 Signal Output Connections The Easidew Online system has three signal outputs Alarm 1 ALr1 Alarm 2 ALr2 and the re transmitted input signal 4 20 mA or 0 20 mA current loop signal depending upon instrument configuration Figure 21 shows the relevant rear panel connections Table 3 shows a summary of all the electrical connections to the monitor The signal outputs will be connected to external systems that can potentially influence the operation of the process AN Alarm level signals could be at line power potential so it is DANGER essential that before connecting these signal lines checks are Electric made to insure that these inputs are not live and that it is safe Shook Risk to handle them Alarm Outputs Alarm 1 is a single pole make contact Connect incoming signal lines to terminal 16 common and terminal 17 normally open Alarm 2 comprises a set of ch
10. 2 0 22mm stranded Transmitter Cable tinned copper conductors PVC insulated Melinex taped Black PVC outer Max length 800m 2 624 ft Operating Specifications Enviemmentsl Bands Standard indoor at an altitude of less than 6000 feet with non g condensing humidity Operating Temperature Operating Mode Ingress Protection Housing Material Dimensions Mounting Weight Approximately 7 40z 210g Analog Output Scaled Range 44 March 2014 Easidew Online User s Manual APPENDIX A Measurement Range Dew Point Accuracy Dew Point Response Time Repeatability Calibration Electrical Specification Olitout Signal 4 20 mA 2 wire connection current source p g User configurable over range Output Dew point or moisture content for ppm Dew point 148 to 68 F 100 to 20 C OR Analog Output Scaled Range Moisture content in gas 0 3000 ppm Non standard available upon request Supply Voltage 12 to 28 V DC Max 250 Q 12 V Load Resistance 500 Q 24 V Current Consumption CE Marked Certified Operating Specifications Operating Temperature 40 to 140 F 40 to 60 C Operating Pressure 5000 psig max 2 to 10 scfh 1 to 5 Nl min mounted in standard sampling Flow Rate block 0 to 10 m sec 0 to 33 fps direct insertion Temperature Coefficient NEMA 4 in protection accordance with standard NEMA 250 2003 Housing Materia Transmitter plus connector L 5 19 x g1 77 132mm x 45mm Sensor Guard Standard H
11. 8 March 2014 Easidew Online User s Manual MAINTENANCE 4 GOOD MEASUREMENT PRACTICE The Easidew Online Hygrometer is designed to operate in a flowing gas stream and is suitable for the measurement of the moisture content of a wide variety of gases In general if the gas in conjunction with water vapor is not corrosive to ceramics or base metals then it will be suitable for measurement by the Easidew Online The transmitter is designed for operation with sample gas flow rates of 2 10 scfh 1 5 NI min sample block 1 10 s min direct connection Ideally the flow rate should be set up between 8 5 and 12 7 scfh 4 and 6 NI min 10 6 scfh 5 NI min is the recommended optimum Flow regulation is not provided within the Easidew Online system Sample gas flow must therefore be regulated outside the instrument on the input side of the sample block by means of a precision needle valve Always use high quality valve gear coupling connections and tubing The transmitter will operate successfully at flow rates within its operational range and it is important to insure that the flow rate through the sample block is high enough to avoid long time lags in response to humidity changes at the sample source Avoid pressure gradients in the system by placing excessive flow restriction on the output side of the sample block In applications where the test gas has a very high flow rate an instrument by pass arrangement is preferable to a flow rest
12. DPE Guard lt 10um Optional 316 stainless steel sintered guard lt 80um 5 8 18 UNF Process Connection amp Material 316 stainless steel Weight 5 290z 150g Interchangeability Fully interchangeable transmitter Electrical Connection Hirschmann GDS series DIN 4350 C Condition Diagnostic Conditions factory Sensor fault programmed Under range dew point Over range dew point Digital Diagnostic RS485 2 wire Modbus RTU Communications Kahn Instruments 45 Dimensions APPENDIX A Easidew Online User s Manual Dimensions O 25 4x 2mm 01 x 0 07 5 8 18 UNF L 10mm 0 39 Transmitter 5 8 Bonded Seal 1 8 NPT 1 8 NPT x 5 8 18 UNF 5 8 18 UNF Sample Block A Y lt _ 96mm y lo SIDE VIEW 3 7 10 5mm FRONT VIEW 0 41 94mm 3 7 Easidew Online Hygrometer i OVERLAY TOP VIEW Monitor Figure 32 Dimensions 46 March 2014 Easidew Online User s Manual APPENDIX B Appendix B RS232 Data Communications Port Connections Optional Kahn Instruments 47 APPENDIX B Easidew Online User s Manual Appendix B RS232 Data Communications Port Connections Optional The Easidew Online instrument has an RS232 port situated on the rear panel of the monitor This port enables remote access to the instrument s configuration and the indicated dew point temperature The
13. Easidew Online Dew Point Hygrometer User s Manual March 2014 Easidew Online For Kahn Instruments contact information please go to www Kahn com Easidew Online User s Manual Contents Safely c dp ncisnealiaaaasanossansdescans daastanaexe det auasangacnarelssusapasasegeccanitnnseasaimucaadenedktuauasanairoxesiusas iv Electrical SON nee M n iv Pressure Safety mrcine dea mA RUEUESATMA MD uU UN LED aU C D a E NEUE FADUM UC MM IM EEE iv TXE Material TE C oT iv Pepe sind MANUS MAN Ge Yu uqa sanam o hamka nanum na usai equal apani qasaqa iv Calibratie mn iv Safety COMMONS sicrie aaa sex aaar aina aE a REL QUUM MB EM hasa hina iv Ab uIalioriSqpuu uuu E Kx RI UR cA ado RR RUE eR DURO Kir NU DUI ADU QD NEA V bri lll S suu N V AB Ip py eNpe n 1 CAE o0 o cAme MM 2 2 INSTALLATION pet O 3 21 Unpacking the IMS rpm 3 2 11 Unpacking the Easidew Transmitter issis 4 212 Unpacking the MONITO iisas a 4 2 1 3 AccessoneS Pack EN T D OS 5 22 BASSE W Online Components ccccazis LU LL dance np ena pFhxE C UE D Esp M etn a 5 PEE o s Transmitter srren S ETE 6 234 Mo iIli rsuu Utm 7 2 5 Monitor Panel Daaya0tuy uu uuu u upas qnie rotta xac anode dana ded ei m 7 26 APumctuonm MEE 9 27 Mo nting the MORON gr 10 2 8 Electrical Conrnecti nSu u Aa a Ai 11 2 8 1 AC POWer Suppl
14. RODUCTION The Easidew Online dew point hygrometer is an instrument designed for the continuous online measurement of moisture content in non corrosive gases over an operational range of 148 to 68 Fdp 100 to 20 Cdp The system is comprised of a programmable monitor configured to accept a 4 20 mA current loop signal from a capacitance type dew point measurement transmitter The range of the transmitter is set to cover the dew point range 148 to 68 Fdp 100 to 20 Cdp at operating pressures up to 5000 psig The monitor also has a re transmission facility which buffers the transmitter output for onward transmission to other systems The transmitter input to the monitor is configured as a 4 20 mA current loop signal and the re transmitted output can be configured as either a 4 20 mA or a 0 20 mA current loop signal ranged as per the input Two alarm outputs high and low are provided for connection to external systems Alarm 1 provides a set of single pole make contacts and Alarm 2 provides a set of changeover contacts Both sets are potential free and Alarm 1 contacts single pole type are rated at 250 V 3 A and the Alarm 2 contacts changeover are rated at 250 V 5 A Figure 1 shows the monitor and the transmitter Figure 1 Easidew Online Monitor and Transmitter Kahn Instruments 1 INTRODUCTION Easidew Online User s Manual 1 1 Features The Easidew Online Hygrometer is simple to use and install and can be conf
15. X and X keys to set the required new r139f61n t value e g 068 0 UcuU 2 10 Press the SET key to accept the new value t followed by the P key to return to the main E f1 M 3 display 0680 T2 1 Figure 27 Set up Alarm Set Point Limits Kahn Instruments 33 OPERATION Easidew Online User s Manual 3 4 4 Scale Units to ppm Set Up To change the monitor to read parts per million by volume ppm proceed as follows Figure 28 shows the operational key sequence NOTE The dew point transmitter must be configured to provide an output proportional to ppmV which can be set up at the time of order or by using the Kahn application software Contact Kahn Instruments for information for contact details see www Kahn com 1 Press the P key once the display will read tECH 2 Press the SET key four times and the display will read dPnt 3 Press the X key the display will flash the current decimal point position 0001 4 Press the N key to set 0000 on the display no decimal point and press the SET key twice tPoL is then displayed 5 Press the X key the display will flash the current minimum span limit 1000 6 Use the X and X keys to set the required ppmV minimum reading 0000 and press the SET key tPoH is then displayed 7 Press the amp key the display will flash the current maximum span limit 0200 8 Use the X and X keys to set the required ppmV maximum reading 3000 and press the SET key twice un
16. angeover contacts Connect incoming signal lines to terminal 9 common terminal 8 normally open and terminal 7 normally closed jececceceeesa Figure 21 Monitor Rear Panel Connections 22 March 2014 Easidew Online User s Manual INSTALLATION Re transmission Output The re transmission output is current sourcing Connect the positive output to terminal 14 and the negative output to terminal 13 Use appropriately colored wires eg red positive black negative Terminal Wire Color wem mtem avare ve a mesa Ls s umama amem User defined Current loop out ve Default 4 20 mA User defined Current loop out ve Default 4 20 mA User defined ALR1 common mocwsm me wamo tw NOTE There are no terminals in positions 5 6 10 11 12 15 18 19 20 21 and 22 Table 3 Summary of Electrical Connections Kahn Instruments 23 OPERATION Easidew Online User s Manual 3 1 OPERATION As supplied the instrument is ready for operation and has been set up with a set of default parameters This section describes both the general operation of the instrument and the method of setting it up and changing the default parameters should this become necessary The default parameters are as follows Span 148 to 68 Fdp 100 to 20 Cdp or 0 to 3000 ppm Temperature units Fdp or Cdp Current loop input 4 20 mA 13 5 F mA or 7 5 C
17. block 3 and tighten to a minimum torque setting of 22 Ibf ft 30 Nm NOTE Use the flats of the hexagonal nut and not the sensor body Figure 13 Transmitter Mounting Sensor Block 16 March 2014 Easidew Online User s Manual INSTALLATION 2 9 3 Transmitter Mounting Direct Pipeline Connection The transmitter may be directly mounted into a pipe or duct as shown in Figure 14 CAUTION Do not mount the transmitter too close to the bottom of a bend where any condensate in the pipeline might collect and saturate the probe The pipe or duct will require a thread to match the transmitter process connection Installation dimensions are shown in Figure 14 For circular pipework to ensure the integrity of a gas tight seal a mounting flange will be required on the pipework in order to provide a flat surface to seal against The following procedure must be carried out by competent personnel 1 Insure that the blue protective cover has been removed from the tip of the transmitter Figure 13 WARNING Under no circumstances should the filter guard be handled with the fingers 2 Attach a bonded seal 2 over the threaded part of the transmitter body 3 Screw the transmitter 3 into the pipe Tighten enough to obtain a gas tight seal Torque will depend upon the pipeline material NOTE Do not overtighten or the thread on the pipe may be stripped 48mm 88 Figure 14 Trans
18. ce to store the new value for Alarm 2 The display then returns to the main dew point temperature display Main display P to exit without setting Current Value P to exit without setting P to exit if setting Alarm 1 only Main Display Figure 24 Set up Alarm Levels Kahn Instruments 29 OPERATION Easidew Online User s Manual 3 3 4 Re Transmitted Output Current Range Set Up The Easidew Online is provided with an 8889 analog current loop output module which buffers and re transmits the current loop input signal from the dew point transmitter as a 4 20 mA current loop to exactly follow the input signal i e 4 mA in 4 mA out E By default the re transmission output is set c L H For certain system processes a 0 20 mA r T i 4 i current loop output may be required The L onf Im iO P set up method is as follows LS SEES Figure 25 shows the operational key sequence Change output from 4 20 mA to 0 20 mA 1 Press the P key once the display will oft read tECH 2 Press the SET key and the display will flash between ConF and PinP MMM I Default setting LJLJLJ 1 0001 4to20mA 3 Press the X key and the display will flash between out1 and ConF 4 Press the SET key to display oAt1 mmmm Nemesis 5 Press the amp key once to display a LJLJLJLJjJ 0000 0 to20mA flashing 4 digit number For the default setting 4 20 mA this will be 0001 6 Press the X key once to change the imi no
19. d 15 sS 4 gt 4 gt Main Display e g C E S To c3 P 3 peu as Bm 8 a amp C3 ET gl uou 1ulod euuilD2 p 19S A widd 0 ului ueds 13S lt cuc Set up Monitor to read ppm Figure 28 3 4 5 Monitor Limits When Unit Scaled to ppm NOTE On displays supplied before December 2011 the display will show When unit is scaled to ppm the display will read zero when the mA input signal is negative ppm values when the sensor input signal is between 3 and 4 mA between 3 and 4 mA 35 Kahn Instruments OPERATION Easidew Online User s Manual 3 5 Digital Communication Parameters Set Up The default parameters for the Easidew Online instrument are as follows Default Address 1 Baud rate 9600 Parity None Stop bits 1 To change these parameters proceed as follows Figure 29 shows the operational key sequence 1 Press the P key once the display will read tECH 2 Press the SET key and the display will flash between ConF and PinP 3 Press the X key five times the display will flash between ConF and Corn Set up instrument address 4 Press the SET key once to display SAdr 5 Press the X key once to display a flashing 4 digit number The default setting is 0001 6 Use the X and X keys to give the required new value e g 0002 NOTE The range of possible addresses is between 1 and 247 Press the SET key to accept the new
20. elected parameter X Right arrow increment key This key is used to access sub menus and within individual sub menus to increase the numeric value of the selected parameter SET key Depending upon the context this key is used to access the set value of the selected process field and as an Accept key for new parameter values Table 2 Function Keys Kahn Instruments 9 INSTALLATION Easidew Online User s Manual 2 7 Mounting the Monitor The monitor is designed for panel mounting and requires a panel cut out of 1 8 x 3 6 46 x 92mm The recommended panel thickness is 0 08 to 0 2 2 to 5mm To mount the unit proceed as follows refer to Figure 9 1 2 Pass the monitor 1 through the front of the panel 2 Support the monitor and insert the hook on the topside of the clamp 3 into the slot 4 located on top of the monitor case Tighten the adjustment screw 5 finger tight against the back of the panel Insert the hook on the second clamp 6 into the slot located on the underside of the instrument casing and tighten the adjustment screw finger tight against the back of the panel Insure that the monitor is sitting flush to the front of the panel 2 and tighten the adjustment screws evenly against the back of the panel Caution Do not overtighten the screws as this could cause the case to crack Figure 9 Mounting the Monitor 10 March 2014 Easidew Online User s Man
21. ete with the body cover 4 and tip cover 5 2 Remove the body cover 4 and the tip cover 5 but leave the blue plastic protective cover 3 in place until ready for installation NOTE The transmitter sensing element is protected while in transit by a blue cover containing a small desiccant capsule The connection pins are protected by a red plastic cap None of these plastic items are required for the operation of the transmitter 2 1 2 Unpacking the Monitor The monitor 2 is packed together with its installation clamps 1 as shown below Figure 4 Monitor Unpacking Method 4 March 2014 Easidew Online User s Manual INSTALLATION 2 1 3 Accessories Pack The accessories pack is shown below Figure 5 Accessories Pack Remove the screwdriver 1 the two leads 2 and 3 and the sample block 4 from the bag 2 2 Easidew Online Components On delivery please check that all the following standard components are present in the packing box Report any shortages to Kahn Instruments immediately Figure 6 Easidew Online Components Monitor clamps 2 off Easidew Monitor Transmitter cable assembly Power cable Screwdriver User s Manual Calibration certificate e ih ip d uem e ee Sample block 9 Easidew transmitter uE Kahn Instruments 5 INSTALLATION Easidew Online User s Manual 2 3 Easidew Transmitter NOTE The transmitter s sensing element is shown for illustration purp
22. f l display to 0000 This selects the re ue l L on transmission output to be 0 20 mA 7 Press the SET key to accept the new value The output current loop is now Main 0 20 mA The display will flash between Display out1 and ConF Figure 25 Configure Analog Output 8 Press the P key once to return to the main dew point temperature display Note The transmitter current loop output signal is now scaled at 6 mA per C input while the transmitter input remains scaled at 7 5 C per mA 30 March 2014 Easidew Online User s Manual OPERATION 3 4 3 4 1 Operating Temperature ppm Range Temperature Range Default The default temperature unit for the Easidew Online instrument is in degrees Celsius This is indicated by the Cdp LED indicator The default settings associated with this temperature scale are as follows Span 100 to 20 Cdp Lower and upper span limits 100 and 20 display flashes outside this range Minimum alarm set point 100 Cdp Maximum alarm set point 20 Cdp to be changed to their Fahrenheit equivalent values 148 and 68 F It is not sufficient just to change the F C units f To range the instrument for F all the above parameters need To change the range to Fahrenheit follow the procedures in Sections 3 4 2 and 3 4 3 Kahn Instruments 31 OPERATION Easidew Online User s Manual 3 4 2 Span and Unit Settings To change the span and unit setting
23. geable Normally connections are made via stainless steel tubing in which case the sensor block transmitter assembly will be self supporting If Teflon tubing is used it may be necessary to support the assembly with a support clip 14 March 2014 Easidew Online User s Manual INSTALLATION Figure 12 Sample Block Gas Connections Both the Input and Output gas connections are Vs NPT It is recommended that both the Gas Input and Output connections are made made via Vs NPT to 6mm or Ye NPT to 1 4 stainless steel tube adaptors 2 to 5 Figure 12 The method of connection to the sensor block 6 is as follows NOTE The following description relates to 6mm tube fixings The sample block ports are both s NPT female process connections Tube adaptors are not supplied with the equipment but can be obtained by contacting your local distributor or Kahn Instruments see www Kahn com for details 1 Cuta suitable length of 1 4 U S 6mm 6mm stainless steel tubing 1 to the correct length and if necessary bend to shape to suit the location of the sensor block assembly NOTE To facilitate ease of connection to the port at least 3 75mm of the tubing coming out of the Gas In port must be straight 2 Clean off any burrs or metal shavings adhering to the tubing 3 Screw the 1 4 U S 1 s NPT NPT Swagelok adaptor 5 into the 1 4 U S Vs NPT NPT inlet port in the sensor block 6 and tighten t
24. gents for re calibration Safety Conformity This product meets the essential protection requirements of the relevant EU and US directives iv March 2014 Easidew Online User s Manual Abbreviations The following abbreviations are used in this manual AC alternating current atm pressure unit atmosphere barg pressure unit 100 kP or 0 987 atm gauge bara bar absolute C degrees Celsius F degrees Fahrenheit DC direct current ft foot feet g gram s Hz Hertz Ibf ft pound force per foot NI min normal liters per minute m meter s mA milliampere max maximum min minute s mm millimeter s MPa megapascal Pascals x10 m sec meters per second Nm Newton meter ppm parts per million by volume RS232 serial data transmission standard Rx receive scfh standard cubic feet per hour scfs standard cubic feet per second SWP safe working pressure Sec second s temp temperature V Volts Q Ohms Warnings The following general warnings listed below are applicable to this instrument They are repeated in the text in the appropriate locations Where this hazard warning symbol appears in the following sections it is used to indicate areas where potentially hazardous operations need to be carried out Where this symbol appears in the following sections it is used to indicate areas of potential risk of electric shock Electric Shock Risk Kahn Instruments V Easidew Online User s Manual INTRODUCTION 1 INT
25. igured to meet specific needs 5 8 18 UNF process connections Dew point or ppm moisture content NEMA 4 IP66 Sensor and NEMA 12 IP65 Monitor front panel only Measurement range 100 to 20 C 148 to 68 Fdp Dual alarms Accuracy 2 Cdp Clear and easy to read display Calibration certificate traceable to NIST 2 March 2014 Easidew Online User s Manual INTRODUCTION 2 INSTALLATION It is essential that the connection of electrical and gas supplies to this instrument be undertaken by competent personnel 2 1 Unpacking the Instrument The Easidew instrument and accessories are packed into a box and the method of unpacking is shown as follows Figure 2 Unpacking Method Open the box and unpack carefully as follows Save all the packing materials for the purpose of returning the instrument for re calibration or any warranty claims 1 Remove the top packing 1 2 Remove the dew point transmitter box 3 3 Remove the accessories pack 4 4 Remove the monitor box 2 Kahn Instruments 3 INSTALLATION Easidew Online User s Manual 2 1 1 Unpacking the Easidew Transmitter NOTE For environmental and operating conditions refer to Appendix A Unpack the dew point transmitter box as follows Figure 3 Transmitter Unpacking Method 1 Remove the cap 1 from the packing tube 6 Remove the foam block 2 1 Remove the transmitter from the tube compl
26. in closed until the dew point temperature moves back within the programmed operational limit Alarm 1 is usually allocated to the Low alarm setting These relay contacts are rated at 250 V 3 A and are connected as shown in Section 2 13 Section 3 3 3 describes the setting up of AL1 trip points AL2 When illuminated this LED indicates that the dew point temperature programmed for Alarm 2 has exceeded the programmed threshold Under these conditions the alarm relay changeover contacts associated with this alarm will change state and will remain in this state until the temperature moves back to within the programmed operational limit Alarm 2 is usually allocated to the High alarm setting These changeover relay contacts are rated at 250 V 5 A and are connected as shown in Section 2 13 Section 3 3 3 details the setting up of AL2 trip points The four function keys are used for setting up the Cm monitor Table 2 describes the operation of the keys Table 1 Monitor Front Panel Controls and Indicators 8 March 2014 Easidew Online User s Manual INSTALLATION 2 6 Function Keys The function key panel is shown in Figure 8 Table 2 describes the operation of the keys P Program key This key is used to access the programming menus and to select sub menus within the list X Left arrow decrement key This key is used to access sub menus and within individual sub menus to decrease the numeric value of the s
27. it is then displayed 9 Press the X key the display will flash the current unit C 10 Press the X key three times to set the display reading to _ ppmV and press the SET key LoL is then displayed 11 Press the X key the display will flash the current alarm lower range limit 1000 formerly 100 0 with no sign or decimal point showing 12 Use the M and X keys to set the required alarm lower range limit point where display starts to flash 0 or different value and press the SET key uPL is then displayed 13 Press the X key the display will flash the current alarm upper range limit 0200 formerly 020 0 with no decimal point showing 14 Use the X and amp keys to set the required alarm upper range limit point where display starts to flash 3000 or different value and press the SET key PUoF is now displayed 15 Press the P key twice and the main display now reading ppmV will show NOTE Neither the C nor the F LED indicators on the front panel of the monitor are now lit On completion of the above procedure appropriate alarm levels relevant to the new ppm scale will need to be set up refer to Section 3 4 3 34 March 2014 OPERATION Easidew Online User s Manual a m m ojaz 6 a Ww obueJ Jamo Wee 19S uudd oooe 6 a jui Hues jeddn uueje 125 2 E gno Js Je a Cimpa E udd goog xew ueds 19S uud
28. mA Re transmission current loop output 4 20 mA 13 5 F mA or 7 5 C mA Alarm 1 set point 4 Fdp 20 Cdp Alarm 2 set point 40 Fdp 40 Cdp Data communications Unit address 1 Baud rate 9600 Parity None Stop bits 1 For the supplied dew point transmitter the span and current loop input setting should not be changed The span will require changing if the instrument is to be ranged in F if a different transmitter is employed if the user chooses to re range the Easidew transmitter or if ppm is selected The instrument must also have been installed as detailed in Section 2 and connected to a sample gas supply that is representative of the process being monitored General Operational Information Operation of the Easidew Online is completely automatic and once set up requires little or no operator intervention The dew point transmitter is designed to operate in a flowing gas stream of between 2 and 10 scfh 1 and 5 Nl min when mounted in a sample block at operating pressures up to a maximum of 5000 psig Direct pipeline mounting requires 0 to 33fps 1 to 10m sec at pressures dependant on the type of material used customer defined The sample gas is taken into the sample block via the Gas In port and in flowing through the sample block comes into contact with the dew point transmitter which in turn produces a current loop output signal proportional to the measured dew point temperature This output signal
29. ment for Measurement control and laboratory use Part 1 General requirements Maximum ambient temperature rating 50 C 122 F 95 To be powered by a certified NEC Class 2 or LPS output power supply source or equivalent 2 50 March 2014
30. ment has been set up In the absence of any error indications the instrument will now be operational using the default parameters Easidew Online Hygrometer SET ql Figure 22 Typical Display If the display is flashing a fault condition exists The following operational error conditions may be encountered ErrL If the display is alternately flashing e g ErrL and 103 3 this indicates that the measured dew point is outside the lower operational limit 148 Fdp 100 Cdp If the display is alternately flashing ErrL and 129 9 199 9 if set up to read temperature in F this could be an indication that the input current loop to the monitor is open or that there may be a transmitter fault Check that the transmitter is wired correctly as detailed in Sections 2 10 and 2 12 ErrH If the display is alternately flashing e g ErrH and 021 4 this indicates that the measured dew point is outside the upper operational limit 68 Fdp 20 Cdp Kahn Instruments 25 OPERATION Easidew Online User s Manual 3 3 3 3 1 System Alarms Alarm Switching Logic Default The Easidew Online system has two alarm outputs As supplied the default alarm set points and the alarm switching logic are as follows the default temperature units are degrees Celsius Low Alarm Alarm 1 AL1 set to 20 Cdp High Alarm Alarm 2 AL2 set to 40 Cdp Alarm 1 Low Alarm is set up to switch ON when the temperature reading is lower ga
31. mitter Mounting Pipe or Duct Kahn Instruments 17 INSTALLATION Easidew Online User s Manual 2 10 Preparation of the Transmitter Cable The transmitter cable is supplied as standard Replacement of additional cables can be obtained by contacting Kahn Instruments see www kahn com for details The cable is pre wired so no user wiring is required If the cable needs to be re wired see below Cable connection to the Easidew transmitter is made via the removable connector Removing the central screw enables the connector terminal block to be removed from the outer housing by using a small screwdriver to pry it clear O ring and washer Figure 15 Connector Terminal Block Removal Caution When removing the central screw insure that the small sealing O ring and the washer are retained on the screw and are present during re installation For the transmitter to work properly and to achieve maximum performance the sensor cable must be connected to the electrical connector as shown in Figure 16 18 March 2014 Easidew Online User s Manual INSTALLATION NOTE The drawing below shows the identity of the connector terminals and wiring connections of the cable manufactured by Kahn Instruments GN GL GREEN 4 20 mA Q J PN BE ple SEEN BRAID SCREEN BRAID rn GREEN 4 20 mA SIGNAL SOURCE m 7 GREEN 77
32. nia 31 3 4 1 Temperature Range Default msisiroraris eaaa a 31 3 4 2 Span and Umit SettNGS u un u m 32 Kahn Instruments i Easidew Online User s Manual 3 4 3 Alarm Set Pore Limit Configuratio P 33 3 4 4 S al Units t ppm Set Up E 34 3 4 5 Monitor Limits When Unit Scaled to Ppimiy csisnassacdanstentensinansttedextseniabataxtdensens 35 3 5 Digital Communication Parameters Set Up 36 3 6 Monitor Reading the Displayed Value Using Modbus RTU Over RS232 38 4 GOOD MEASUREMENT PRACTICE 22355 1ms EE REOR Rad Md cU Rudi dudar a SERM M OE RR GRE qub Pede 1 39 4 1 General Operational Guidelines 40 42 Maintenance and Calibration aguaruna a 41 4 2 1 Clean arre e e 41 L Fault Condition S eaaa mmm 42 Figures Figure 1 Easidew Online Monitor and Hahnsmittetr uuu u us aussi qanapi saka 1 Figure 2 Unpacking Method Mm rr lx A li a liyuna ayaman wal aaa 3 Figure 3 Transmitter Unpacking Method smirenim 4 Figure 4 Monitor UNPACKING Meth d imagen v avi Ru aud A AR DE BV URN 4 Figure 5 acc a AS 5 Figure 6 Easidew Online Components sessin airinn a E 5 Figure 7 ace Air AC 6 Figure 8 Montor Panel Layo Z Figure 9 M n ng the ONION AME e 10 Figure 10 AC Power Supply CORDSCUOHS neo
33. nitor display should come on Depending on the version of the monitor there are 2 types of sequential messages appearing on the display Type 1 Digits sequentially tested each in turn displaying the figure 8 followed by rUO2 then oAor and Sbr Type 2 Digits sequentially tested each in turn displaying the figure 8 followed by ruOO then oror and alternately flashing ErrL and 129 9 The 9Cdp LED will by default also be illuminated and it is possible that even though no alarms are currently set up one of the alarm LED s may be illuminated NOTE If the instrument is configured to read ppm neither of the temperature LED indicators will be lit 3 If a loop calibrator is available set it to Ext loop and connect to terminal 4 positive and terminal 3 negative of the process indicator 4 Set the output current of the loop calibrator to 4 mA the display should now be reading 100 0 5 Set the output current of the loop calibrator to 20 mA the display should now be reading 020 0 6 Switch off and disconnect the loop calibrator Before wiring the external signal outputs and the transmitter perform a system check as follows 2 9 Mounting the Sample Block and Transmitter 2 9 1 Sample Block Gas Connections Sample gas connections are made to the Gas In and Gas Out ports on the sample block see Figure 12 Either port on the sample block may be used as the Gas Input port i e for connection purposes the ports are interchan
34. nstrument failure Refer to Kahn Instruments for repair Check transmitter cable for continuity damage Rectify replace cable Gas is wetter than 68 Fdp o Check gas source Sensor Sensor contaminated Replace re calibrate transmitter calibrate transmitter Check gas source supply out Iput Cur arrange Re calibrate replace transmitter f Swap input connections from the Reverse pul Connection transmitter to the monitor Sensor failure or break in sensor connection 42 March 2014 Easidew Online User s Manual APPENDIX A Appendix A Technical Specifications Kahn Instruments 43 APPENDIX A Easidew Online User s Manual Appendix A Technical Specifications Measurement Range HC o Dew Point 148 to 68 F 100 to 20 C dew point Electrical Specifications Input Signal 4 20 mA input from Kahn dew point transmitter Output Signal 4 20 mA or 20m4A 2 wire connection current source P g User configurable over range Alr 1 Relay Single pole make contact rating 3 A 250 V AC Alr 2 Relay Changeover contacts rating 5 A 250 V AC Dew point or moisture content for ppm Dew point 148 to 68 F 100 to 20 C Moisture content in gas 0 3000 ppm Non standard available upon request 100 to 240 V AC 10 15 50 60 Hz Optional 24 V DC 15 10 6W Temperature and Alarms Load Resistance Max 600 Q Current Consumption AL1 AL2 C F Copper braid screened cable 4 core 7 0
35. o a torque setting of 25 Ibf ft 35 Nm 4 Pass the stainless steel tubing 1 through the locking nut 2 NOTE Threads towards the gas port 5 Fitthe back ferrule 3 over the stainless steel tubing 1 with the bevelled end facing the back of the front ferrule 4 6 Placethe front ferrule 4 over the stainless steel tubing 1 bevelled end towards the adaptor 5 7 Push the stainless steel tubing 1 as far as it will go into the adaptor 5 and tighten up the locking nut 2 finger tight 8 Hold the adaptor 5 flats with a wrench and tighten up the locking nut 2 to a torque setting of 25 Ibf ft 35 Nm 1 turns This action compresses the front ferrule 4 and back ferrule 3 onto the tubing to form a gas tight seal 9 Connect up the other gas port as described in steps 1 to 8 above Kahn Instruments 15 INSTALLATION Easidew Online User s Manual 2 9 2 Transmitter Mounting Sample Block installation technician The following procedure must be carried out by a qualified To mount the transmitter into the sensor block preferred method proceed as follows refer to Figure 13 1 Remove the blue protective cover 2 and its desiccant capsule 2a from the tip of the transmitter 2 Place the bonded seal 4 over the threaded part of the transmitter body WARNING Under no circumstances should the filter guard be handled with the fingers 3 Screw the transmitter 1 into the sample
36. oses only Please keep the HDPE or SS guard installed at all times Hexagonal Nut Transmitter Label Transmitter Cover Electrical Connector Figure 7 Easidew Transmitter 6 March 2014 Easidew Online User s Manual INSTALLATION 2 4 2 5 Monitor The controls and indicators associated with the Easidew Online are located on the front panel of the monitor Connections to the Easidew dew point transmitter the RS232 communications port and the external power supply are all made to the rear panel of the monitor Figure 8 shows the layout of these controls and Tables 1 and 2 describe their respective operational functions Dew point temperature units are displayed by one of the two LED s located to the left of the display On delivery the monitor is set up as F or C depending on the order specification If required the units can be changed from C to F or vice versa The method of configuring the unit for C or F is described in Section 3 4 Optionally the instrument can be set up to read dew point in parts per million ppm range 0 to 3000 ppm This option requires the transmitter to be set up for ppm either at the time of ordering or subsequently via Kahn application software NOTE No specific ppm LED indicator is provided on the monitor ppm is selected if neither the Cdp nor the Fdp temperature indicators are illuminated Two temperature alarm indications are provided by two LEDs located on the
37. ppakiaashbasqhakaya 35 Figure 29 Setup Data Communications Parameters ie in Fabius n oss EPPu ania 37 Figure 30 Installation Logati wanuqa amanaqiaahusataqaqawauysqapayshusahanqauquykasskasptasaayaqapi 40 Figure 31 Indication of Dead Space T 40 Figure 32 DIMENSIONS 46 Figure 33 RS232 EPI AMEN ee mE Oe ee REP OPER 48 March 2014 Easidew Online User s Manual Tables Table 1 Monitor Front Panel Controls and Indicators 8 Table 2 FANCHON REY E X UO O U 9 Table 3 Summary of Electrical Connections 23 Appendices Appendix A Technical Specificatii MSs a a wundanndsnsevaiaianaies 43 Appendix B RS232 Data Communications Port Connections Optional 47 Appendix C LCS IMG BOO NE N 49 Kahn Instruments Easidew Online User s Manual Safety The manufacturer has designed this equipment to be safe when operated using the procedures detailed in this manual The user must not use this equipment for any other purpose than that stated Do not apply values greater than the maximum value stated This manual contains operating and safety instructions which must be followed to ensure the safe operation and to maintain the equipment in a safe condition The safety instructions a
38. re either warnings or cautions issued to protect the user and the equipment from injury or damage Use competent personnel using good engineering practice for all procedures in this manual Electrical Safety The instrument is designed to be completely safe when used with options and accessories supplied by the manufacturer for use with the instrument Pressure Safety DO NOT permit pressures greater than the safe working pressure to be applied to the instrument The specified safe working pressure SWP for this instrument is 45 MPa 450 barg 6500 psig Toxic Materials The use of hazardous materials in the construction of this instrument has been minimized During normal operation it is not possible for the user to come into contact with any hazardous substance which might be employed in the construction of the instrument Care should however be exercised during maintenance and the disposal of certain parts Repair and Maintenance The instrument must be maintained either by the manufacturer or an accredited service agent For contact information visit the website at www Kahn com Calibration The recommended calibration interval for this instrument is 12 months unless it is to be used in a mission critical application or in a dirty or contaminated environment in which case the calibration interval should be reduced accordingly The instrument should be returned to the manufacturer Kahn Instruments Inc or one of their accredited service a
39. riction after the transmitter Kahn Instruments 39 MAINTENANCE Easidew Online User s Manual 4 1 General Operational Guidelines General guidelines to be followed when setting up a sampling system are as follows Transmitter Positioning The sample point should be as close to the critical measurement point as possible Also never sample from the bottom of a pipe as entrained liquids may be drawn into the sensing element Figure 30 Installation Location Avoidance of Dead Spaces Dead space causes moisture entrapment points increased system response times and measurement errors as a result of the trapped moisture being released into the passing sample gas and causing an increase in partial vapor pressure Deadspace Figure 31 Indication of Dead Space e Particulate and Oil Removal Particulate matter at high velocity can damage the sensing element and similarly at low velocity they may blind the sensing element and reduce its response speed If particulate such as degraded desiccant pipe scale or rust is present in the sample gas use an in line filter High Quality Tube and Fittings Kahn Instruments recommends that wherever possible stainless steel tubing and fittings should be used This is particularly important at low dew points since other materials have hygroscopic characteristics and adsorb moisture on the tube walls slowing down response and in extreme circumstances giving false readings
40. right hand side of the display These are marked AL1 low and AL2 high Access to the alarm relay contacts is provided on the rear panel The connection for these alarm relay contacts is shown in Section 2 13 NOTE Every display is factory installed with 2 alarm relays as standard Monitor Panel Layout 3 Easidew Online 2 I 1 B Hygrometer Wl 5 SET Figure 8 Monitor Panel Layout Kahn Instruments 7 March 201fNSTALLATION Easidew Online User s Manual m s sss ao Uh When illuminated this LED indicates that the displayed dew point reading is in degrees Fahrenheit Note If neither the Fdp or Cdp LED is lit ppm is selected When illuminated this LED indicates that the displayed dew point reading is in degrees Celsius Note if neither the Cdp nor Fdp LED is lit ppm is selected Main dew point temperature display Flashes to alternately indicate ErrL error low and temperature reading for low dewpoint under range lower than 148 Fdp 100 Cdp or 199 9 Fdp 129 9 Cdp for an open loop condition Flashes to alternately indicate ErrH error high and temperature reading for high temperature over range AL1 When illuminated this LED indicates that the dew point temperature programmed for Alarm 1 has exceeded the programmed threshold Under these conditions the alarm relay contacts associated with this alarm normally open will change state close and will rema
41. rmiririireire i nudi NEP EEan ELE Rap uf 12 Figure 11 DC Power Supply ConnectiONS six atbeda eava yay AFER ERN A 13 Figure 12 Sample BIOCK Gas CODUBCHODIS uz nuq iu a Evae DEEP UULRU o REEM NUR MF M RUAIM 15 Figure 13 Transmitter Mounting Sensor BIOCK 205 ioinsssisssechossoavianatonsilebtaadcaiiandatamiacaaains 16 Figure 14 Transmitter Mounting Pipe OF DUCL i oir beber ba er Fox abd Ra aide ER I7 Figure 15 Connector Terminal Block Removal aaa saaaaawasanana waka naaaaaaa nanayawa 18 Figure 16 Wining Connection S n027 v 19 Figure 17 Eag pWesy sssPPs ln MN 19 Figure 18 Maximum Load of Easidew Including Cable Resistance 20 Figure 19 Connector Installation MM 20 Figure 20 Transmitter Connections sorena 9 21 Figure 21 Momtor Rear PANG Connection S uwasssiysasssiashimanahunpapnhaahumplshaqquhi aqqqanaapqanan 22 Figure 22 Typical DISPlay aonan a R A T O R 25 Figure 23 Change Alarm Switching LOgIG u 2 aaaaaaaaaanaananaaaqkanaakanayawananquanawamakayinwa 28 Figure 24 Set up Alarm 29 Figure 25 CONMOUTS Analog OLDU u uu 1 aa apiu EEE EERE aA 30 Figure 26 Spam and Unit Settings uuu unusapa muku waqya uya a Gn vd Ra 32 Figure 27 Set up Alarm SetPoint LImItS uuu aasaanaaawayawaaqanasawaniwanayawamqamawaqmanwahau 33 Figure 28 Set up Monitor 10 read PpINU uawqquanosphiqaqaaqanqapapqhuiaah
42. s proceed as follows Figure 26 shows the operational key sequence 1 10 11 12 13 Press the P key once the display will read tECH Press the SET key six times and the display will read tPoL Press the amp key and the display will flash with the current minimum span limit 100 0 Use the X and X keys to set the required equivalent Fahrenheit value 148 0 and press the SET key tPoH is then displayed Press the X key the display will flash the current maximum span limit 020 0 Use the X and X keys to set the required equivalent Fahrenheit value 068 0 and press the SET key twice unit is then displayed Press the X key the display will flash the current unit 9C Use the X and X keys to set the required scale units F in this example and press the SET key LoL is then displayed Press the amp key and the display will flash with the current alarm lower range limit 100 0 Use the X and X keys to set the required equivalent Fahrenheit value 148 and press the SET key uPL is then displayed Press the X key the display will flash the current alarm upper range limit 020 0 i bol J I N l D i i i i f i Y I I l i I x I s l j I i I I Y l I I I I d I x I x d I l l Figure 26 Span and Unit Settings Use the X and X keys to set the required equivalent Fahrenheit value 068 0 and press
43. s drier than the alarm set point value For the default set points therefore the default switching logic for these alarms is as follows Alarm 1 Temp 20 Alarm 1 ON Temp gt 20 Alarm 1 OFF Alarm 2 High Alarm is set to switch ON when the temperature reading is higher gas wetter than its set point value For the default set points therefore the operation of this alarm would be as follows Alarm 2 Temp 40 Alarm 2 OFF Temp gt 40 Alarm 2 ON Depending upon the application if required it is possible to reverse the switching logic for either or both of the alarm channel outputs to provide the following alarm output configurations Alarm 1 Temp lt 20 Alarm 1 OFF Temp gt 20 Alarm 1 ON Alarm 2 Temp lt 40 Alarm 2 ON Temp gt 40 Alarm 2 OFF Section 3 3 2 describes the method for reversing the default switching logic and Section 3 3 3 describes the method for setting up individual alarm set points 26 March 2014 Easidew Online User s Manual OPERATION 3 3 2 Reversal of Alarm Switching Logic As described in Section 3 3 1 the switching logic for the alarm channels may if required be individually reversed Starting at the default state the method of reversing the switching logic for both alarms is as follows Figure 23 shows the operational key sequence For Alarm 1 1 Press the P key once and the display will read tECH 2 Press the SET key and the display will flash between ConF and PinP
44. t Calibration services are offered by Kahn Instruments All calibrations are traceable to the National Institute of Standards and Technology USA The Easidew transmitter can be returned to Kahn Instruments for calibration at 13 points across the dewpoint range 148 to 68 Fdp 100 to 20 Cdp Alternatively Kahn Instruments can provide an exchange transmitter Prior to re calibration an exchange transmitter can be ordered from Kahn Instruments Once the replacement transmitter and calibration certificate have been received the original transmitter can be disconnected from the sample line and the monitor and the replacement transmitter installed in its place Refer to Section 2 1 1 The original transmitter should be packed in its original packing see Figure 3 and returned to Kahn Instruments Easidew transmitters are fully interchangeable and can be used with any Easidew Online monitor Transmitter interchangeability is not affected by cable length Clean Monitor The front panel of the monitor should be cleaned with a moist lint free cloth Mild detergent may be used to remove any stubborn marks or stains but DO NOT use any type of solvent e g acetone which could damage the instrument Kahn Instruments 41 MAINTENANCE Easidew Online User s Manual 4 3 Fault Conditions Message Displayed Check power supply to transmitter Check Sensor failure transmitter cable for continuity damage Rectify replace cable I
45. the SET key PUoF is then displayed Press the P key twice to return to the main menu The maximum and minimum alarm level limits should now be changed to suit the new Fahrenheit unit values refer to Section 3 4 3 32 March 2014 Easidew Online User s Manual OPERATION 3 4 3 Alarm Set Point Limit Configuration Main displ The following procedure is used to set limits to bit which the alarm levels can be set usually after re configuring the instrument s range for Fahrenheit readings Figure 27 shows the operational key sequence 1 Press the P key once the display will read imas ss e tECH iLonF i iP qD 2 Press the SET key once and the display will x4 flash between ConF and PinP nest tete s F iGEnn 3 Press the X key four times and the display ON ww will flash between ConF and GEnn 4 Press the SET key once the display will read SU L SU LJ 5 Press the X key once to display a flashing he 4 digit number representing the current minimum alarm level setting The default nnn setting for the C range is 100 0 uw lt 18 6 Use the X and X keys to set the required new E value e g 148 0 15 M is 7 Press the SET key to accept the new value L The display will read SU u 8 Press the X key once to display a flashing i 4 digit number representing the current sH LJ maximum alarm level setting The default E setting for the C range is 020 0 Hn 1o 9 Usethe
46. ual INSTALLATION 2 8 Electrical Connections Electrical connections to the Easidew Online system are as follows AC power supply 100 to 240 V AC 15 10 50 60 Hz 6 VA A low voltage 24 V DC option is also available Transmitter current loop input 4 20 mA 24 V DC loop power provided by monitor Alarm 1 Low potential free contacts single pole make Contacts rated at 250 V 5 A Alarm 2 High potential free contacts single pole changeover Contacts rated at 250 V 5 A Re transmitted input signal from the dew point transmitter 4 20 mA or 0 20 mA Kahn Instruments 11 INSTALLATION Easidew Online User s Manual 2 8 1 AC Power Supply Input AN It is essential that the connection of electrical supplies to this DANGER instrument be undertaken by competent personnel Shock Risk Connect the AC power supply to the monitor as shown in Figure 10 Refer also to Table 3 which gives a summary of all the connections to the rear panel of the monitor Monitor viewed from underneath Figure 10 AC Power Supply Connections 1 Insure that no power is connected to the power lead 2 Connect the blue white US standard neutral lead 2 to terminal 23 on the rear panel of the monitor 3 Connect the brown black US standard live lead 3 to terminal 24 on the rear panel of the monitor 4 Strip back the insulation on the free end of the power cable and wire to
47. value Set baud rate 7 bAud will now be displayed Press the X key once to display a flashing 4 digit number The default setting is 0003 representing 9600 baud 8 Use the X and amp keys to give the required new value the range is 0 to 4 0 1200 baud 1 2400 baud 2 4800 baud 3 9600 baud 4 19200 baud Press the SET key to accept the selected value Set parity 9 Prty will now be displayed Press the X key once to display a flashing 4 digit number The default setting is 0000 representing no parity none 10 Use the X and X keys to give the required new value the range is 0 to 2 0 none 1 Odd 2 Even Press the SET key to accept the selected value Set number of stop bits 11 StPb will now be displayed Press the key once to display a flashing 4 digit number The default setting is 0000 representing 1 stop bit 12 Use the X and X keys to give the required new value the range is 0 1 0 1 stop bit 1 2 stop bits 13 Press the SET key to accept the selected value followed by the P key to return to the main display 36 March 2014 OPERATION Easidew Online User s Manual E Main display Set Parity gei mm cam m sss ai umi m m a i None Odd Even 0000 0001 0002 C3 d 7 C3 C3 Cj CD EJ Set number of stop bits SECO 1 stop bit 2 stop bits 0000 0001 Main Display F SIR Conk Lr t LI LI LI x5 LI LI pe L
48. y E25 P emp AE 12 2 8 2 DC Power Supply Input Optional smamimcmimiminsinm na 13 28 3 Preliminary Systemi estu u ogar aa aA aai 14 2 9 Mounting the Sample Block and Transmitter UI UU LLL aasawa sasawa 14 2 9 1 Sample Block Gas COBMBCDIOPI accende ka Ke exa kauadist CARN ROAD DURER EIE 14 ps We Transmitter Mounting Sample Block in herum utate nhu ts eoe tr A uuu 16 2 9 3 Transmitter Mounting Direct Pipeline Connection enses rcv a cone retina dadas 17 2 10 Preparation of The Transmitter Cable 18 211 BBCi Call SME OU eT EO Om 19 2 fil Electrical BOUNCES T TERR 20 212 Transmitter Cable C nBGCtIOru u uuu aska asia rU EPIRI HQ qha DIARIES 20 22 1 Transmitter COnReGtIi riS LLL aasawa ua miaka akuspa miqa wahaspa awia 20 2 12 2 _ MONROE CONNECTION u ususqa nmalispakuyaiwa hamaqhupaynukiawpussiawankuypuiiuwaisasipwawawiasishis 21 2 13 Signal Qutput COMMS CUOING e 22 m OPERATION a asua aaa du Im E aesuima 24 34 General Operational Information Lu a a S 24 3 2 Preparation For Op ratiOn tt 25 3 2 1 First Time OPSTAUO NM MeL 25 CA M o n E 26 9 9 4 Alarm switching Logie Default sissi 26 3 3 2 Reversal of Alarm bes p regisBfos oet 27 3 3 3 Alarmo Level SetU sirrin e EEEE ENEO E 29 3 3 4 Re Transmitted Output Current Range Set Up 30 3 4 Operating Temperature ppm Range aassisiidberevikbbpidddos Dod
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