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Optisure Remote Optical Hygrometer

1. PARAMETER A To Toggle Scroll Queso of Menu items WV item J Figure 3 5 Menu Structure May 2012 20 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 3 6 Operational Functions 3 6 1 Operating Cycle The default parameters set up for the instrument define an operating cycle see Figure 3 6 Temp PAS miny Max Time 0 DCC HOLD DCC 2 min MEASURE e g 4 hrs Default 4 min Default Figure 3 6 Typical Operating Cycle At initial switch on the instrument enters a DCC cycle for 2 minutes Initially the mirror will be at or close to ambient temperature and the Peltier heat pump attached to the mirror drives the mirror temperature up 36 F 209C above the ambient temperature to insure that all moisture is driven off the surface of the mirror During the DCC period the STATUS area of the display will indicate DCC and the interval timer will count down the time until measurement resumes The SENSOR area of the display will initially show HEATING followed by CONTROL and then COOLING after the initial DCC period has expired During the DCC process Data Hold retains the analog outputs at the value s read before DCC commenced Data Hold typically lasts 4 minutes from the start of a DCC cycle or until the instrument has reached the dewpoint This procedure is in
2. Figure 2 10 Sample Block 2 7 Pressure Measurements Optional As an option an external pressure transducer can be connected to the OPTISURE Remote and either installed into a sampling system or connected directly into the sample line if conditions permit If equipped this allows for online measurement and monitoring of pressure of the sample The pressure measured by this sensor is then used internally in the calculation of all pressure related parameters If a pressure transducer is not installed then 101 3 kPa is used as the basis of all calculations The optional pressure transducer is ranged from 0 to 377 psig 0 to 25 barg May 2012 14 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 3 OPERATION As supplied the Optisure Remote is ready for operation and a set of default parameters has been installed 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 3 1 General Operational Information While the instrument can physically operate in a flowing gas stream of between 0 1 and 2 Nl min 0 2 and 4 2 scfh Kahn Instruments recommends operating at approximately 1 0 scfh 0 5 NI min which is the flow rate used during calibration Operating at an alternative rate could impact the instrument s response time If the instrument is to monitor the conditions in an environment make sure
3. 94 V2 Values in HEX i e 17th March 11H for Val1 and 03H for Val 2 Table F12 Register Configuration L Value Sign bit 1 for ve values signed int 7FFF 32767 BEEE 32768 Table F13 Register Configuration M May 2012 59 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Register Configuration N Floating Point Representation The humidity values for sensors 1 amp 2 are represented in IEEE 754 single precision floating point format in order to cater for the wide range in the value of ppm v This format is Big Ended which means that the high byte is at a lower address in memory than the Lo byte and is represented as such in the register memory map The IEEE 754 format is shown below Bit 31 Bits 30 to 23 Bits 22 to 0 Sign bit Exponent Field Mantissa 024 Has 127 bias value Decimal representation of binary where 1 0 lt value lt 2 0 1 Examples of floating point to HEX are shown below Example 1 10 3 Sign bit 0 Exponent 3 therefore exponent field 127 3 130 and bits 30 to 23 10000010 The mantissa 1 2875 which in binary representation 1 01001001 1001 1001 1001 1 0 1 Adjusting the mantissa for the exponent moves the decimal point to the right if positive and to the left if negative As the exponent is 3 then the mantissa becomes 1010 0100 1100 1100 1100 1101 therefore 1010
4. 1x2 0x2 1x2 0x29 10 and 0100 1100 1100 1100 1101 0x2 1x27 1x29 0 3 Therefore the word value 0100 0001 0010 0100 1100 1100 1100 1101 4124CCC D Consequently for sensor 1 register 0001 4124 and register 0002 CCCD Example 2 0 0000045 Sign bit 1 Exponent 18 therefore exponent field 127 18 109 and bits 30 to 23 May 2012 60 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 011011 01 The mantissa 1 179648 which in binary representation 1 00101101111111010110101 i e 1x2 18 1x2 21 1x2 23 etc 0 0000045 Therefore the word value 1011 0110 1001 0110 1111 1110 1011 0101 B696FEB 5 Consequently for sensor 1 register 0001 B696 and register 0002 FEB5 May 2012 61 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 15 14 133 12 11 10 9 8 7 6 5 4 83 2 1 0 DP 00000000 Temp lt 00000001 ppm v 00000010 ppm w sf6 200000011 g kg 00000100 g m 00000101 pressure 00000110 flow 00000111 rh 00001000 temp difference 00001001 Table F14 Register Configuration P May 2012 62 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Intentionally blank page May 2012 63 Kahn Instruments Inc
5. If required the instrument s FAST function can be switched on and off as follows 1 Select SETUP from the Main Menu 2 Use the W down key to select DISPLAY from the Setup Menu page 3 Press the Enter key to enter the display menu and then use the up and W down keys to highlight FAST 4 Press the Enter key to enter the FAST parameter field and use either the A up and W down keys to change the parameter field to ON 5 Press the Enter key to set FAST to ON 6 Press the lt q left key to return to the Setup Menu page and the W down key to highlight EXIT 7 Press the Enter key to guit the Setup Menu page 8 To return the instrument to internal monitoring repeat operations 1 to 5 above selecting INT at Step 4 9 To cancel the FAST function repeat steps 1 to 8 above setting the parameter field in Step 4 to OFF Pressing the Enter key in Step 5 then turns off the FAST function May 2012 23 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 3 6 6 STANDBY Mode This function is used for applications where the dew point of the sample gas changes very quickly from dry to wet creating conditions which may cause the sensor to saturate Alternatively it may be used in applications requiring infrequent manual measurements to be taken where it is preferable to have the sensor disabled between measurements In STANDBY mode drive to the Peltier heat pump is removed allowin
6. 9 du I N eer ere eee 51 May 2012 iil Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual SAFETY The Manufacturer has designed this product to be safe when operated correctly jm Please pay careful attention to the Safety Instructions outlined on this page and elsewhere in this manual They have been designed to protect the user from personal injury and the equipment from damage 2 Please observe the installation advice and any operational limitations given in this manual 3 This equipment must only be used for the purpose for which it was designed 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 The input power supply voltage limits are 85VAC to 264VAC 47Hz to 63Hz Refer to Specification Pressure safety Before pressurizing the user must insure through appropriate protective measures that the system or the device will not be over pressurized When working with the instrument and pressurized gases safety glasses should be worn DO NOT permit pressures greater than the safe working pressure to be applied to the instrument The specified maximum safe working pressure is 290 psig 20 barg When an internal sample pump is installed this is limited to atmospheric pressure This instrument is not designed to accept gas pressures higher than the specified maximum working pressure Applica
7. Figures Figure 2 1 LVU OI CU SI U E nn A I D EN Z Figure 2 2 LOVE 60 Or OZONUN O RIK Osis o noved 4 Figure 2 5 FOI OG SEPT CUTE 5 Figure 2 4 Iaa a TTT 6 Figure 2 5 POF I EESO PER PER EEE EE EMEA PES 8 Figure 2 6 ZO and AUOD CBUIDUE CODDBECTORS 1s ead ris n EEEE ESTEE eee 10 Figure 2 7 EA Os PENDET CETT 12 Figure 2 8 Pe E NOR IE a T rH 13 Figure 2 9 LE BE T T N E J emia 13 Figure 2 10 IE O AAA N 14 Figure 3 1 gaps P EE E E 3s A E ETE E TEE AT E E 16 Figure 3 2 Haa H re E E E AP T 17 Figure 3 3 Late e na S I m 18 Figure 3 4 I OIE a p da a P AIE n ainu E TT EA 19 Figure 3 5 ed Unas a C a d S een 20 Figure 3 6 C T dl P RS RE NEE AAE ene suas UC TIT R CNN E EI 21 Figure 4 1 PV OIC ADOITO STRE BEI stt pp iu IMS rique EUER ua EM E IE 23 Figure 4 2 CO E A GOV i AEE E E OPA E E E E RU ar Figure 5 1 FORF SN FUE RO fo Gol fc 8 estu EEUE ee ee ALAE AAE 28 Figure 5 2 Remove and NENES Fan TEST PE 29 Figure A 1 CSIC Remote DIMENSIONS PT T J9 Figure A 2 Optisure Remote Measurement RelUBsissepscest ete sese in sa Ke Tables Table 2 1 Ree LRT Bel era eeartepbtd atii ho T S DINE M 7 Table 3 1 Function key esed cR I TO POTE E K 16 Table B 1 Default set up p l fi t s na 37 Appendices Appendix A P onea Pee a ON aaan S OTT IDONEUS 34 Appendix B Default Set Up Parameters acutior epe lE sb n nn 37 Appendix C FONN E p S ii 38 Appendix D 8 e T ETT ETT 42 Appendix E OPEC TET VN O TTE 46 Appendix F ikea
8. gt Back D E Search Folders W My Computer amp Jd 315 Floppy A S Local Disk i ADOBE Fc Explore LJ Brothe Open Hiit Docum Search X Drivers AutoPlay iL Helen CJ Legacy LJ Mwas Scan 5 3 Pro D R pe Eject J Project m JJ FSFOR Cut Lj WIND Copy w Local Disk V My Disc E J Audio CD Properties Ss ER 18 objects 7 17 MB Y My Computer Figure C1 Select Format Collapse Sharing and Security Rename 1 Format S8000 G Capacity 512 MB vr 3 File system FAT v 4 S SS Allocation unit size fault allocation size Na valume label S000 Format options 94 Quick Format Figure C2 Set Format Properties Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 9 Theformatting process now begins and a progress bar indicates that formatting is in Formatting S8000 G X progress See Figure A3 The formatting time depends upon the computer Capacity processors speed and the capacity of the 512 MB disk being formatted Typically a 512MB disk will take around 7 seconds File system 10 A status indicator reports Format ei complete as soon as the formatting Allocation unit size process has finished see Figure A4 SETE AAS The disk can then be removed from the drive Volume label Sano To remove the disk from the drive first push it in ae to remove the lock and then withdraw from the Format
9. 00000111 rh 00001000 rh 00001000 temp difference 00001001 temp difference 00001001 Table F7 Register F Display Setting A 15 14 133 2 1 1009 8 7 6 5 4 83 2 1 0 DP Temp Press and Flow are logged by default DP 00000000 Temp 00000001 ppm v 00000010 ppm v 00000010 ppm w sf6 200000011 ppm w sf6 200000011 g kg 00000100 g kg 00000100 g m 00000101 g m 00000101 pressure 00000110 pressure 00000110 flow 00000111 flow 00000111 rh 00001000 rh 00001000 temp difference 00001001 temp difference 00001001 Table F8 Register F Display Setting B 15 14 13 12 1 10 9 st 7 e6 s5 4 3 2 1 0 Unsigned Integer range 65535 Table F9 Register Configuration H May 2012 58 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Value Sign bit 1 for ve values signed int 7FFF 3276 7 BEEE 3276 8 The value in bits 15 to 0 1 is divided by 10 to give 0 1 resolution for dewpoint and temperature values Table F10 Register Configuration J 15 14 13 12 01 1 9 st 7 e615 4 3 2 4 0 4 ___ Vall Val Val1 amp 2 are in BCD therefore 10H 10 58H 58 and 09H 9 so as a result A to F are not valid values Table F11 Register Configuration K 15 14 3 2 1 0 9 es 7 e6 5 413 241414 0 4 Valh
10. 47 to 63 Hz 100 VA max e Alarm outputs comprise two sets of changeover relay contacts one set for a PROCESS alarm and one set for an INSTRUMENT FAULT Both sets of contacts are rated at 24 V 14 NOTE THIS RATING MUST NOT BE EXCEEDED 2 4 Conversion of Optisure Remote to Rack Mount To convert an Optisure Remote to a rack mounted version a rack mounting kit Optional Part No S8K PKT is required This conversion pack comprises two steel wings 3 and eight cap screws 1 each wing bolting to the side of the instrument with four screws as shown in Figure 2 2 Figure 2 2 Conversion of Horizontal to Rack Mount 1 Turn the unit on its left hand end and line up the mounting holes on the right hand side of the instrument with the corresponding holes in the right hand wing flange facing outwards 2 Insert the four cap screws 1 and washers 2 through the wing 3 and tighten finger tight 3 Insure that the front flange 3 is square to the front of the instrument and tighten the cap screws 4 Turn the unit on its right hand end and repeat operations 2 and 3 To remove the rack support wings remove the unit from the rack if necessary and follow the directions above in reverse May 2012 4 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Procision Dewpointmeter Figure 2 3 Rack Installing Method 1 Remove the connector blocks from the alarm and
11. 9 c lt 01 4 20mA 0 1V 10 Analogue O P 2 00 01 4 20mA 0 1V 10 Analogue O P 1 00 01 4 20mA 0 1V 00 10 Table 04 Register Configuration B May 2012 56 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Measurement 0000H DCC 0001H Data Hold 0010H Max Cool 0100H Standby 1000H OOH 01H 10H Stop Logging In Control Heating Cooling 1 FAST Frost Assurance 1 Optics Reset 1 Display Hold 1 Max Cool Initiate 1 DCC Initiate 1 Start Logging 1 Fault Alarm 1 Humidity Alarm 1 External PRT 1 Initiate Standby 0 Table F5 Register D Status Word 0 o0 8 7 6 5 4 3 21 0 Ij s jo 5 lA sle o zle gt ge OOH 01H kPa 10H 1 FAST Enable Psig Barg Reset Defaults Language Measurement 0000H DCC 0001H English 0000 Data Hold 0010H Chinese 1111 Max Cool 0100H x S Standby 1000H Table F6 Register E Units May 2012 57 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 15 14 133 12 0 100 9 8 716 5 4 3 2 150 Dispay2 Displyt O DP 00000000 DP 00000000 Temp 00000001 Temp 00000001 ppm v 00000010 ppm v 00000010 ppm w sf6 200000011 ppm w sf6 200000011 g kg 00000100 g kg 00000100 g m 00000101 g m 00000101 pressure 00000110 pressure 00000110 flow 00000111 flow
12. allows 2 70 million logs or around 43 years logging at 5 second intervals 4 point traceable in house calibration as standard UKAS accredited calibrations optional please consult Kahn 180mm u n ager eS Figure A 1 Optisure Remote Dimensions Measurement Range Cdp 40 50 60 70 80 D o C2 e Sensor Operating Temperature 9C Figure A 2 Optisure Remote Measurement Range May 2012 35 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Appendix B Default Set Up Parameters May 2012 36 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Appendix B Default Set Up Parameters DURATION Sets duration of OUTPUT HOLD i Sets maximum output hold time after DCC SETPOINT Sets No degrees heated above mirror temp RESET OPTICS Select as required INTERVAL Sets MEASURE period DISPLAY HOLD If set to Yes display readings are held during amp HOLD period If set to No display always tracks measured parameters INTERVAL Sets interval between consecutive log points LOGGING Defines if logging required LOGGING FILENAME Automatically added when SD card inserted OP1 TYPE Sets output type 4 20mA 0 20mA or 0 1V PARAMETER Sets output parameter monitored list of 8 MIN Defines upper span limit MAX Defines lower span limit OP2 TYPE Sets output type 4 20mA 0 20mA or 0 1V PARAMETER Sets output parameter moni
13. analog output sockets 2 If necessary remove any covers from the rack cabinet to gain access to the rear and side 3 Connect the analog and alarm output connector blocks to the internal rack wiring refer to Sections 2 6 2 amp 2 6 3 insuring that there is sufficient free cable to permit withdrawal of the instrument from the rack 4 Slide the instrument into the rack and support its weight while the four mounting SCrews are inserted 5 Insure that the front panel of the instrument is flush and square with the front of the rack and tighten the mounting screws 6 Insert the analog and alarm connectors into their respective sockets on the rear of the instrument refer to Sections 2 6 2 amp 2 6 3 and connect the external PRT probe and USB communications cable and connector as appropriate 7 Connect the power supply cable and switch the ON OFF switch to ON 8 Reinstall any covers to the rack as necessary To remove from the rack follow the directions above in reverse May 2012 5 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 2 5 Exterior Layout The controls indicators and connectors associated with the Optisure Remote are located on the front and rear panels of the instrument The controls and indicators relating to the operator interface are located on the front panel The analog outputs USB communications port combined power supply input socket power on off switch remote sensor co
14. and will be written into the File name field as soon as an SD card is inserted 8 Quit the Setup Menu page by using the left key selecting EXIT with the W down key and pressing the Enter key May 2012 24 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 4 APPLICATION SOFTWARE Application software for the Optisure Remote is supplied on a CD The latest version of this application software is also always available from Kahn Instruments To install on a PC place the CD in the CD drive and follow the application set up wizard If the CD does not auto run double click the application set up file on the CD The following authorization code is required during the installation process 7316 KAHN OPTI Once installed and a PC connected to the Optisure Remote via the cable provided refer to Section 2 6 7 starting the Optisure Remote Application Software package will then display the current status of the instrument Section 4 1 gives further details on the installation of the Application software The application software is capable of emulating all the instrument s control set up and logging functions and provides an expanded parameter display by simultaneously displaying all the measured and calculated parameters An expanded stability graph scales definable is also provided for displaying any combination of the nine measured or calculated parameters against a time base The main toolbar inclu
15. display line will appear as 5 Process This two state ON OFF notification indicates Accept selected whether a parameter process alarm is either ON or o parameter OFF A process alarm can be set on any parameter and its set point and ON OFF control are set up via the Alarm Set Up Menu refer to Section 3 6 2 iid E 11 46 eo 6 Fault This status line is used to monitor the optical ME d BG system and the degree of mirror contamination During 4 90 Duration 00 13 49 normal operation under no fault conditions this will 53 02 E rs read OFF but will be set to ON if there is either a fault 3 02 s como with the optics or dp temperature measurement or if Nen ronne n ie j the mirror contamination exceeds 100 of the film pag pray thickness 7 Sensor This status line indicates the operational mode of the sensor This can be either CONTROL HEATING or COOLING Figure 3 3 Set Up Display May 2012 18 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 3 5 Menu Structure The Optisure Remote has a three level menu structure the top level of which Main Menu is accessed from the Front Page by pressing the Enter key see also Table 3 1 This causes the Main Menu to pop up and overwrite the central area of the current display as shown in Figure 3 4 Within this pop up menu five options are available EXIT DCC ON OFF MAXCOO MEASURE STANDBY OPERATE and SETUP These options are selecte
16. of the measured or calculated output parameters selected Spans for each signal output are separately configurable Refer to Section 2 6 2 IEC Power supply input socket and power on off switch Contains integral power on off switch and fuse Universal power input 85 V to 265 V AC 47 63 Hz fuse T2 5A 20x5mm slow blow Pressure transducer connector Used for connecting an external pressure transducer to the instrument Sensor connector Used for connecting the chilled mirror sensor to the instrument via the sensor cable Fan Filter Table 2 1 Controls and Indicators May 2012 7 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 2 6 Back Panel Connections These tasks should be undertaken only by competent personnel A N All the connections to the rear panel are electrical connections Exercise due caution particularly when connecting to external EET alarm circuits which could be at high potential ectric Shock Risk Connections to the rear panel of the instrument are shown in Figures 2 5 to 2 8 and should be made as follows 2 6 1 Power Supply Input The AC power supply is a push fit into the power input socket as shown in Figure 2 5 The method of connection is as follows 1 Insure that both ends of the power cable are potential free i e not connected to an AC power supply 2 Check that the ON OFF switch 1 on the power supply connector is switched to OFF 3 Push the IE
17. options drive slot Quick Format Enable Compression Create an MS DOS startup disk Figure C3 Format Progress Figure C4 Format Complete May 2012 41 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Appendix D Calculations May 2012 42 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Intentionally blank page May 2012 43 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual D Calculations D 1 Moisture Content The accuracy of the humidity calculations was determined by comparing the displayed value to corresponding values calculated from the formulas below using a PRI simulator to set a dew point value and the Kahn Humidity Calculator to calculate the water vapor pressure wvp ppm v dry wvp 101325 wvp 10 ppm v wet wvp 101325 10 ppm w SF6 wet amp dry ppm v 0 12334954 g kg ppm v 0 0006212138 g m 217 273 15 Dp wvp 100 Note ppm v can be calculated on a dry or wet basis depending upon bit 10 in the units command register which can be set via the application software D 2 Temperature dewpoint PRT simulators are used to simulate the dewpoint and ambient temperature sensors For each pair of temperature readings the instrument display is read and the actual t dp readings recorded Each of these readings is then compared against calculated t dp readings using the same input pa
18. the sensor is located in a representative position i e not under an air conditioning vent The available options for sensor installation are via a permanently installed sample port into which the remote sensor can be inserted or via a sensor block immediately attached to the sensor around which the sample circulates or in an ambient environment where the sample is diffusing through the sensor The sample inside the sensor is passed over a Peltier chilled gold plated mirror The instrument controls the mirror temperature to a point where a level of condensate is maintained on the mirror surface The temperature of the mirror is then measured as the dew point The Optisure Remote is suitable for the measurement of moisture content in a wide variety of gases It will not contaminate high purity gases and is safe for use in critical semi conductor and fiber optic manufacturing applications 3 2 Preparation for Operation On delivery the instrument will have been set up with a standard set of default parameters defining the operation of the instrument These parameters can be changed as required by means of the Setup Menu page refer to Section 3 6 2 3 2 1 Sample Flow Adjustment The sample flow can be measured by installing a flow meter into the sample line preferably after the Dewpoint sensor The ideal flow setting is between 0 2 to 4 2 scfh 0 1 to 2 Nl min The sample flow can be adjusted by the installatio
19. 000 37 005 38 00060 39 007 41 0029 42 002 43 00B 4 002C 47 OF 48 00300 49 003 50 0032 51 008 BER 58 00955 M PROCESSALARM SP HI Table F1 Modbus Holding Register Map May 2012 55 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Val ue Sign bit 1 for ve values signed int 7FFF 327 67 BFFF 327 68 The value in bits 15 to 0 1 is divided by 100 to give 0 01 resolution for dewpoint and temperature values Table 02 Register Configuration A 15 114113 112 111 lio lo 18 1 2161514 123 Analogue 0 P 2 A DP 00000000 DP 00000000 Temp 00000001 Temp 00000001 ppm v 00000010 ppm v 00000010 ppm w sf6 0000001 1 ppm w sf6 0000001 1 g kg 00000100 g kg 00000100 g m 00000101 g m 00000101 pressure 00000110 pressure 00000110 flow 00000111 flow 00000111 rn 00001000 rn 00001000 temp difference 00001001 temp difference 00001001 Table 03 Register Configuration A i2 1 10 9 8 7z 6 5 4 3 2 1 0 Analogue O P 3 pC Analogue OP3 O S tiw riw riw riw riw vw rw riw riw riw riw rw DP 00000000 Temp 00000001 ppm v 00000010 ppm w sf6 200000011 g kg 00000100 g m 00000101 pressure 00000110 flow 00000111 rh 00001000 temp difference 00001001 0 20mA 0 20mA 0 20mA co D O o 2 D
20. 8 F sec 1 C sec 0 01 F 0 05 C 4 wire Pt100 ambient temperature measurement 0 to 25 bara 0 25 FS Operating Conditions 0 290 psig 0 20 barg 0 2 to 4 2 scfh 0 1 to 2 Nl min 14 to 194 F 10 to 90 C 14 to 140 F 10 to 60 C Sensor Pressure Sample Flow Rate Sensor Operating Temperature Range Storage Temperature Electrical Output Input 3 analog outputs User definable for hygrometric units and flexible configuration for 0 20 mA 4 20 mA or 0 to 1 V Outputs Change over relay contacts 30 V 1 A for hygrometric units and set points with user configurable set points Changeover relay contacts 30 V 1 A for mirror contamination optical and temperature measurement fault Pre set Modbus RTU protocol 9600 baud rate data using USB interface 85 V to 246 V AC 47 to 63 Hz Power Consumption 100 W Mechanical Specifications High definition blue LCD HMI User adjustable contrast Menu navigation via five button keypad Dimensions Instrument 180 x 400 x 320mm 7 1x 15 7 x 12 5 hxwxd Dimensions Sensor 045 x 128mm with M36 x 1 5 6g mounting thread Cable Lengths 2 b or 10m Weight 17 41 Ib 7 9 kg Process Alarm Fault Alarm Communications Power Supply May 2012 34 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Detection System Single optics detection system SDHC Card 512Mb supplied and USB interface Data Logging SDHC Card FAT 16 32Gb max that
21. C connector 3 firmly into the power input socket 2 4 Connect the free end of the power cable to a suitable AC power supply source voltage range 85 V to 264 V AC 47 63 Hz and switch on the AC supply The instrument may then be switched on as required by the power ON switch Figure 2 5 May 2012 8 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 2 6 2 Analog Output Connections Three analog outputs each of which can be configured to represent any one of the directly measured or calculated output parameters are provided as 2 wire signals from a 6 way connector located on the rear panel of the instrument Each of these outputs can be set up as either a current loop signal either a 4 20 mA or 0 20 mA current loop or alternatively as a 0 1000 mV voltage signal The configuration of these outputs i e parameter represented output type current loop or voltage and upper lower span levels are set up via the Setup Menu page refer to Section 3 6 2 These signals may be used to control external systems During a DCC cycle and for the hold period following a DCC cycle they are held at the level that they were at immediately prior to the start of DCC When the dew point measurement is stable or if the maximum hold period has expired
22. NTROL Figure 3 2 Typical Front Page Display The instrument display is divided into two sections Operational data measured or data calculated from measured parameters is shown in the three horizontal panes on the left of the display Operational status information is shown in a separate display area on the right hand side 3 4 1 Operational Data Display Each of the three operational data panes can be configured to display one of the following parameters IE Dewpoint Temperature Moisture content ppmy Moisture content ppmy Moisture content g kg Moisture content g m 9o Relative humidity rh Temperature difference ee eS S Pressure see also Section 2 7 The parameters displayed are operator selectable and by default are set from the top of the display to Dewpoint Temperature and Relative Humidity May 2012 17 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual An example of the method of setting up the parameter to be displayed is shown graphically in Figure 3 3 and is as follows l Press the W down key This switches the display to highlight the top pane Use a combination of the W down and Aa up keys to highlight the required pane Use a combination of the lt q left and P right keys to scroll through the list of parameters available for display NOTE A parameter can only be displayed on the screen once If it is already displayed it is no
23. Optisure Remote Optical Hygrometer User s Manual Optisure Remote Optical Hygrometer Kahn Instruments Inc 2012 This document is the property of Kahn Instruments and may not either in part or whole be copied or otherwise reproduced communicated in any way to third parties nor stored in any data processing system without the written authority of Kahn Instruments Inc May 2012 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Contents Pl D A E TIPS V EIT SUI oec A IC MIN DNI BA EUH HUM MIT I opine IN DNE exten et IV Pre ey prac ecco EE E S S M S UU EET V lej eal aet 125 3 ETT UU IIT TITIUS A S V By CODO 1 APR IE IS ES ERU AAA AI TA AMI ATI PADO A A V PRO Sie 0 1 EE E HE E mi i A V AAE vi WV TINGS a S AES N S S MU MEME PIN IP E UpAMNDEID Suet vii 1 Il a5 81b B GN ple rr 1 E a E aaa 1 e T 05 e 78 E RON aa E 2 EE E 2 Cl B sieste lt vL Me lve s F ET mE 2 3 243 Operating R fUif lfi lii aissws as 4 2 3 1 Environmental Requirements ss zaz sa s ss 4 2 3 2 Electrical UN nnan 4 2 4 Conversion of Optisure Remote to Rack Mount esee enne nennen 4 2 4 1 Fitting Rack Mounted Version Into Rack sisina 5 2 5 E E OU sa ss nm 6 2 5 1 Bio g dge oars gle Eas Tess 7 5 28 0 4392 13 80 S ICTU oem 8 2 6 1 POWErSUPPV Mig eru ete sd e 8 2 6 2 Analog OUEDEECOBHSCLIODS utogacsuktPX DS s PT D DUE EXE 9 2 0 3 Alarmi Outpu
24. Rate 0 2 to 2 0 scfh 0 1 to 1 Imin Internal Flow Transducer Meter Single point calibration at optimum flow Detection System Temperature regulated emitter with dual optic detection High definition blue LCD User adjustable contrast Menu navigation via five button keypad 3 analog outputs User definable for hygrometric units and flexible configuration for 0 to 20mA 4 to 20mA or O to1V Pressure Option bara psia kPa for pressure Accuracy 0 25 Process Alarm Changeover relay contacts 30V 1A for hygrometric units and Set points with user configurable set points Changeover relay contacts 30V 1A for mirror contamination Opti cal and Temperature measurement fault Pre set Communications Modbus RTU protocol 29600 baud rate data using USB interface Data Logging SD Card 512mb supplied and USB interface SD Card FAT 16 2Gb max that allows 24 million logs or 560 days logging at 2 second intervals Operating Range 4 F to 122 F 20 C to 50 C temperature Up to 90 relative humidity Storage Temperature 40 F to 140 F 40 C to 60 Vertical 17 5 high x 7 9 wide x 13 8 deep 16 4 deep when microscope mounted Horizontal 7 3 high x 17 3 wide x 13 8 deep 16 4 deep when microscope mounted Weight Vertical 24 Ibs Horizontal 22 lbs Power Supply 85VAC to 264VAC 47 to 63 Hz 100VA Power Consumption 100W Pressure Input Option 4 20mA p
25. an option is highlighted provides access to a third level Variable Menu Pages associated with the selected option Within the third level Variable menu pages the lt q left and right keys are used to scroll the individual fields and the 4 up and W down keys are used to change parameter values Operation of the Enter key then sets the selected value into the appropriate field Both the second Setup Menu page and third level Variable Menu Pages each have an EXIT option In the Setup Menu page selecting the EXIT option followed by operation of the Enter key returns to the Front Page display To quit the Variable Menu Pages and return to the Setup Menu page press the left key Once the set up parameters have been fixed only Main Menu operations tend to be used on a daily basis Details of the set up parameters and their default values can be found in Appendix B May 2012 19 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual FRONT PAGE N A Change FRONT PAGE lt FRONT PAGE AND e HIGHLIGHT PARAMETER Parameter STATUS INFO TO VIEW to view ms ms ms ms ms mme 7 Scroll Menu Items v NTERVAL DISPLAY HOLD NTERVAL ILENAME OP1 TYPE PARAMETER A Select Scroll O Variables Menu Items v Menu OP2 TYPE PARAMETER OP3 TYPE PARAMETER SETPOINT ONTRAST RESOLUTION PRIMARY UNIT BTABILITY TIME
26. anel Double click on the System icon and select the Hardware tab Select Device Manager Failing this a prompt will show to load these drivers which can be installed from the CD supplied May 2012 26 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual To communicate with the Optisure Remote the software needs to know which communications USB port the Optisure Remote is connected to On first launch the software will ask for the communications port number which can be either automatically detected or manually selected A screen shot of the communications window is shown in Figure 4 3 S8000 application software communications setup _ x Choose a communication port number Before you can communicate with the Optisure you need to choose a communication port number This can be done automatically or manually Select the method from the options below jAuto detect Auto detect FARRER EERE EERE EEE EERE EEE EERE SER E REE E EE EE Status Idle lies thic rr O abin tain mira mu uS Te Use this port amp skip this screen everytime Figure 4 2 Communications Window Clicking Auto detect will prompt the software to search for the Kahn Instruments USB driver in Windows Device Manager From that it will determine which USB port the Optisure Remote is connected to and establish a connection automatically Manual selection of a communications port is provided in the unlikely event that the softw
27. are cannot auto detect it NOTE Upon successfully establishing communication record the port number and in future skip this window by checking the Use this port amp Skip this screen every time option Once communications have been established click the OK button to go to the Options window The latter provides two choices Data acquisition and Edit variables Choose either Data acquisition if continuous charting display and logging of instrument readings is required or Edit variables if only the editing of instrument variables configuration is required May 2012 27 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 5 MAINTENANCE There are few user serviceable parts on the Optisure Remote These include cleaning the mirror in the sensor the removal and replacement of the fan filter element and the removal and replacement of the AC power supply fuse 5 1 Safety This eguipment operates from power supply voltages that can be Iethal and at pressures depending upon application that could cause injury Insure that any test installation meets the standards described in Section 2 3 of this handbook Under NO circumstances should the instrument case be removed or the air vents covered or in any way restricted A N Maintenance and repair other than that described in this section must only be carried out by trained personnel and the instrument e should be returned to the manufacturer for this pu
28. asic MODBUS operation There are two possible MODBUS transmission modes ASCII and RTU Remote Terminal Unit The Optisure Hygrometer is classed as an RTU Communication between a host system e g PC operates on a Query Response Cycle see the Figure D1 below where a specific Modbus function code embedded in the query message tells the addressed slave device what actions to perform using the information contained in the data bytes An error checkfield provides a method for the slave to validate the integrity of the message contents lf the slave makes a normal response the function code in the response is an echo of the function code in the query and the data bytes will contain data collected by the slave e g holding register values or status information If an error occurs the function code is incremented by 80H most significant bit set to 1 to indicate that the response is an error response and the associated data bytes contain a code to define the error The error check field CRC Cyclic Redundancy Check allows the master to confirm that the message contents are valid USB Serial Bus Host Optisure Figure F1 Modbus Connection May 2012 53 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual F2 1 MODBUS RTU connections and protocol The physical connection from the master to the Optisure Hygrometer uses a USB connection cable between the host and the instruments communications connect
29. ata contained within these registers by writing back The following tables list these registers as they apply to the Optisure Remote and specify the number and data formats that apply to each register A copy of the application software is contained on the CD delivered with the instrument 1 Double click the zip file to open the Optisure application software and launch the OPTISURE exe file Follow the set up procedure Select the language to be used during the installation Exit all other Windows programs before running the Setup program Accept the licensing agreement 5 5 4 The System information window will specify whether or not the PC meets or exceeds the minimum reguirement for Optisure application software 6 Enter the following authorization code 7316 KAHN OPTI 7 Amend the destination directory if desired The default directory is C Program Files Optisure Application Software 8 Select the program folder The default program folder is Kahn Optisure Application Software 9 Launch the installation from the installation summary window 10 Restart the computer to finalize the installation If the software installation has been successful Windows should recognise the Optisure USB connection and automatically load the relevant drivers This can be checked in Windows Device Manager and if successful is listed under the Ports COM amp LPT category To select the Device Manager click Start and select Control P
30. ay The two alarm output ports are connected to the instrument via a single 6 way push fit connector block as shown in Figure 2 6 Each output comprises a 3 wire set of potential free change over relay contacts Each contact set is labelled COM common 0 V N O normally open with respect to COM and N C normally closed with respect to COM To differentiate between the alarm output channels it is recommended that a black lead be used for each of the COM common lines and a separate color for each of the N O and N C lines A N WARNING Alarm leads MUST be potential free DANGER when wiring to the connector block Electric Shock Risk For each output 1 Strip back the wire for the common black connection to the COM connector way for the FAULT alarm contact set exposing approximately 0 25 in 6mm wire and clamp into the screw block COM terminal way Do not overtighten the screw 2 Strip back the wire for the N O e g green connection to the N O connector way for the FAULT alarm contact set exposing approximately 0 25 in 6mm wire and clamp into the screw block N O terminal way Do not overtighten the screw 3 Strip back the wire for the N C e g blue connection to the N C connector way for the FAULT alarm contact set exposing approximately 0 25 in 6mm wire and clamp into the screw block N C terminal way Do not overtighten the screw 4 Repeat operations 1 to 3 for the PROCESS alarm contact set using appropria
31. d by means of the A up and YW down keys As each option is highlighted it is presented in a reverse video box Pressing the Enter key then provides access to the operations associated with that option Dewpoint EXIT DCC ON OFF T turg E Adp 01 adde Duration 00 14 22 tel SN gidi SETUP Process ON Fault OFF Sensor CONTROL Figure 3 4 Main Menu Selecting the EXIT option returns the operator to the Front Page The next three options DCC ON OFF MAXCOOL MEASURE and STANDBY OPERATE are two state context sensitive instrument control commands which are toggled from one state to another by means of the Enter key For example if DCC is ON DCC OFF the only other possible operation is displayed in the Main Menu Operation of the Enter key will toggle DCC to OFF and next time the menu is called DCC ON will be displayed The MAXCOOL MEASURE and STANDBY OPERATE command menu options also operate in a similar manner displaying the only option available when the Main Menu is called Section 3 6 describes the operations of these functions When the SETUP option is highlighted pressing the Enter key provides access to a second menu level the Setup Menu page This menu and subsequent associated sub menus the Variables Menu Pages are presented not as pop ups but as full page screens The options on the Setup Menu page are similarly scrolled by means of the Aa up and W down keys and pressing the Enter key when
32. d by pressing the Enter key This then highlights the first item e g DURATION of a sub menu relating specifically to that function Use the A up and W down keys to scroll through the list to select the required sub menu DURATION in this example and press the Enter key The value field relating to the selected sub menu is then highlighted The value field can now be changed by means of the Aa up and W down keys When the required value has been reached pressing the Enter key accepts the new value and the display is returned to the sub menu for the selected option To return to the Setup Menu page from any part of the sub menu list press the left key Other parameter values are changed by highlighting the required sub menu option and changing the associated parameter values in a similar manner to that described above Table B 1 lists all the Setup Menu page options the individual sub menu options and where appropriate the default values applied to each data field 3 6 3 DCC Dynamic Contamination Control Dynamic Contamination Control DCC is a system designed to compensate for the loss of measurement accuracy which results from mirror surface contamination During the DCC process the mirror is heated to 36 F 20 C above the dew point to remove the condensation which has formed during measurement The surface finish of this mirror with the contamination which remains is used by the optics as a reference point for
33. des the principal operation comments DCC ON MAXCOOL ON and STANDBY refer to Section 2 6 for details of the use of these commands Datalogging set up and control commands are also contained on the main toolbar and are used to set up logging profiles When using the application software all datalog files are stored on the host Context sensitive help files provide details on the operational use of the application software 8000 application software Michell instruments Ltd lvl m eae TS SER matin a 8 090 c 40 07 22 291 C 10769 2 0 0 lim 1328 37 Measure 0 0 Bara 6 698 Control 8 330 03 43 49 EI C3 GW C3 99 ED dB US dB 9 0 4 Oct 11 38 11 40ct 11 39 51 A Oct 11 41 31 1 0et 11 42 01 10ct 11 44 51 4 Oct 11 46 31 4 Oct 11 43 11 Figure 4 1 Typical Application Software Screen May 2012 25 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual The Optisure Remote has a Modbus communications interface via the USB port This enables remote access to the instrument s configuration and data logging facilities This protocol offers two way communication between a host PC known as the master unit to one or more instruments termed slave units Once communication is established by the master unit reading or writing to holding registers within an addressed slave unit is possible The master unit can obtain measured values and status information by reading registers and can respond to d
34. e 2 output maximum value RW 001C Analogue 2 output minimum values RW O PRW y ini PRW PRW RW RW PRW ELEM NE RW PRW RW RW PRW RW i RW qu L LL L L L OO OR J pM p p RW MININ D 001D Analogue 3 output maximum value 001E Analogue 3 output minimum 001F Analogue output configuration 1 Co 0020 Analogue output configuration 2 Co 0021 Logging Interval Co 0022 Units Command UNITSCOMMAND E M MIRROR TEMP DISPLAY SETTING1 DISPLAY SETTING2 p L ILENAME DDMM F L FILENAME HHMM F A IRM VER C 0023 Mirror Temp Set Point during DCC 0024 Emitter Drive dv 0025 Stability Time 0026 RTC Year valt Month val2 0027 RTC Date vali Hours val2 0028 RTC Mins valt Secs val2 0029 Display Setting 1 A e N 002A Display Setting 2 002B 002C 002D 002E Filename DDMM or MMDD A A O l On co 002F 0030 0031 0032 0033 0034 Process Alarm Configuration Display ontrast 0035 Process Alarm Set Point ALARMCONFIG_DISPCONT 1 001 2 002 3 008 4 004 5 005 7 0 11 00 13 000D 14 000E 15 00F 16 0010 7 on 18 002 19 0013 pu ju 22 006 28 0017 24 0008 28 001 31 O0t 32
35. ent color wire for the OP2 and OP3 outputs 5 Locate the terminal block over the connector labelled ANALOG OUTPUTS and push the terminal block firmly into the connector Figure 2 6 Alarm and Analog Output Connectors May 2012 10 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 2 6 3 Alarm Output Connections Two alarm outputs are provided from a terminal block located on the rear panel of the instrument as two pairs of potential free change over relay contacts These are designated as a PROCESS alarm and a FAULT alarm Under the Setup Menu page refer to Section 3 6 2 the PROCESS alarm can be configured to represent any one of the measured or calculated parameters and set up to operate when a pre set parameter threshold level is exceeded By default the PROCESS alarm is set to monitor the Dewpoint parameter The Fault alarm is a non configurable alarm which continuously monitors the degree of contamination of the chilled mirror During normal operational conditions this alarm will be off If the optics or the mirror contamination exceeds 100 of the film thickness or if a fault exists on the Pt100 the alarm is triggered and the relay contacts will change state This fault is also reported to the status area of the Front Page displ
36. fore an SD card can be used for the storage of datalog results it must first be formatted Initially the card must be connected to a card reader which must in turn be connected to the host computer Most proprietary card readers connect to the host via a USB port Almost all laptop notebook PC s are equipped with an SD card reader slot The formatting procedure is as follows 1 Insert the card into the card reader and open Windows Explorer The card will be reported as Removable storage device 2 Right click the card icon and select Format from the pop up menu refer to Figure A1 opposite 3 The Format dialog box is now presented as shown in Figure A2 and the disk Capacity is reported on the top line 1 This will depend upon the type of disk used 512 MB in this example 4 Inthe File system box 2 Figure A2 select FAT this selects FAT 16 DO NOT select FAT 32 or NTFS 5 Inthe Allocation unit size box 3 leave this set to Default allocation size 6 If required in the Volume label box 4 enter a volume label e g Optisure 7 The SD card requires a full format so leave the Quick format box 5 unchecked 8 Click the Start button 6 the following message will now appear Click OK to proceed Format BACKUP 1 6 EN WORKING Formatting will erase ALL data on this disk To Format the disk click OK To quit click CANCEL tt 58000 G PE File Edit View Favorites Tools Help Fia gt
37. further measurements This removes the effect of contamination on accuracy After switch on the mirror is assumed to be clean therefore the instrument will only run a DCC for 2 minutes to quickly establish a clean mirror reference point By default every subsequent DCC is 4 minutes in duration This command is used to turn the DCC function either ON or OFF During normal operation this command will be set to ON For special reasons it may be desirable to disable the DCC function in order to prevent it from interrupting a measurement cycle e g during a calibration run NOTE The DCC command is context sensitive i e if DCC is ON the Main Menu shows only DCC OFF as being selectable Similarly if DCC is OFF only DCC ON is shown May 2012 22 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 3 6 4 MAXCOOL Function The MAXCOOL function over rides the Dewpoint control loop and applies maximum cooling drive to the Peltier heat pump It can be used e todetermine what temperature the mirror can be driven down to with reference to the sensor body This temperature is indicated on the display e to determine whether or not the instrument is controlling at the dew point and whether it is able to reach it This situation could for instance arise when attempting to measure very low dewpoints where possibly due to a high ambient temperature the Peltier heat pump is unable to depress the temperature far enough to
38. g the sensor to settle naturally at the ambient temperature and so eliminate the possibility of sensor saturation The main use for this feature is during set up for instance where flow rates are being adjusted and the analog outputs are being configured where measurements are not required during this period This feature is also used to inhibit MEASURE mode while the mirror is being cleaned 3 6 7 Data Logging The LOGGING function provides the facility to log at operator specified intervals real time values of all the instrument s parameters and to store these logged results on an SD memory card To set up this facility proceed as follows 1 Select SE T UP from the Main Menu and press the Enter key to display the Setup Menu page 2 Press the W down key to highlight LOGGING and press the Enter key twice to enter e g the INTERVAL field 3 Use the A up and W down keys to set the required INTERVAL duration and press the Enter key 4 Insert a formatted SD card in the slot immediately below the function keys 5 Press the W down key to highlight LOGGING and press the Enter key twice to enter the selection field which initially will be set at NO 6 Press the 44 up key to select Yes and press the Enter key NOTE If an SD card has not been installed it will not be possible to select Yes and an error message CARD NOT FITTED will be displayed 7 A file name based on time date is automatically allocated
39. hich measures the moisture content of the sample using a Peltier chilled gold plated copper mirror is designed to operate at pressures up to 290 psig When installed within a sealed gas system the sensor is designed for operation with flow rates of 0 2 and 4 2 scfh 0 1 to 2 0 Nl min It is important to insure that the flow rate through the sample line connecting the source to the OPTISURE sensor is high enough to avoid long time lags in response to humidity changes at the sample source 6 1 General Guidelines General guidelines to be followed when setting up a sampling system are as follows Insure that the sample is representative of the gas under test The sample point should be as close to the critical measurement point as possible Minimize the dead space in sample lines Avoid the use of too many T pieces in line couplings or other unnecessary tubing 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 Remove any particulate matter or oil from the gas sample Particulates entering the instrument s sensor chamber will cause contamination of the optical components and the mirror which will result in the necessity for more frequent cleaning If the likelihood of the presence of particulates such as deg
40. is installed in the instrument T2 5A 20 x 5mm Ceramic Slow blow Fuse B Fit a new fuse cartridge 6 into the fuse holder 4 and push the fuse holder 4 back into the power connector housing 5 6 Replace the IEC power connector 2 into the power socket 3 switch on the external power supply and switch on the instrument 1 Check that the instrument is now operational If the fuse blows immediately on switch on either contact the manufacturer ortheir service agent DO NOT ATTEMPT ANY FURTHER SERVICING PROCEDURES 5 3 Fan Filter Cleaning To maintain adequate cooling it is essential that the fan filter be checked at periodic intervals and kept clean The frequency of checking will depend upon the working environment but checking and cleaning at three monthly intervals is recommended The fan is located on the rear panel Figure 5 2 shows the method of removing the fan filter Figure 5 2 Remove and Replace Fan Filter 1 Switch off the instrument 2 Grip the fan filter case 3 and pull it away from the fan body The case is a push fit If it does not come away easily there is a small slot located under the fan case for the insertion of a screwdriver to assist in prying it off 3 The fan case 3 comes away with the gauze 2 and the filter element 1 4 Clean the gauze 2 with a moist lint free cloth 5 Wash the filter element 1 in water con
41. its from the following formula Psia bara 1 14 5 14 7 Kpa bara 100 May 2012 45 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Appendix E opecification May 2012 46 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Intentionally blank page May 2012 47 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual PARAMETER SPECIFICATION Measurement Range 76 Fdp to 104 Fdp 60 Cdp to 40 Cdp Optisure Measurement Range LI 2 E c Sensor Temperature F C and F for dewpoint and temperature rh gm gkg ppmv ppmw SFg for calculated humidities Pressure Option bara psia kPa for pressure Accuracy 0 25 To 0 001 for all units and user selectable Accuracy 0 18 F 0 1 C for dew point and temperature 0 25 FS for pressure Measurement Response Times from a DCC to a stability of 0 36 Fdp 0 2 Cdp 1 min to a dewpoint amp 12 min to a frost point Sensitivity 0 0018 F 0 001 C Dp and Temp Repeatability 0 09 F 0 05 C Remote Temperature Probe 4 wire PT100 or PT 1000 user selectable ambient temperature Input measurement May 2012 48 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual PARAMETER SPECIFICATION Sensor Pressure 0 250 psig 17 bar with the internal sample pump the unit is limited to atmospheric pressure Sample Flow
42. n of a needle valve in the sample line If a pressurized sample is to be measured at atmospheric then the needle valve needs to be installed and adjusted upstream of the sensor For measurements at sample pressure the flow adjustment should be made downstream of the sensor May 2012 15 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 3 3 Function keys The function keys located below the display are used to select operations from the Main Menu level to enter sub menu levels and to select and enter parameter variables within those menu levels The SD card reader used for data storage during data logging operations is located below the function keys Figure 3 1 Function Keys The function keys are shown in Figure 3 1 Table 3 1 describes the operation of the keys Scroll down key From the Front Page display this key is used to scroll down the displayed parameter panes to highlight in reverse video the parameter of choice e g dewpoint If required the highlighted parameter can then be changed by means of the left and P right keys to highlight one of the six remaining parameters This parameter can then be selected for display by pressing the Enter key From the main pop up menu this key is used to scroll down through the available options Within sub menus this key is used to scroll down and highlight options available for selection within the sub menu Within sub menu levels re
43. nd s temp temperature USB Universal Serial Bus V Volts May 2012 vi Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 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 A N Where this symbol appears in the following sections it is used DANGER to indicate areas of potential risk of electric shock Electric Shock Risk May 2012 vii Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 1 INTRODUCTION The Optisure Remote hygrometer is a high precision instrument used for the measurement of moisture content in air and other gases Relative humidity and other calculated parameters based on dew point pressure and temperature of the sample gas can also be displayed Gases can be sampled at a maximum pressure of 290 psig 20 barg The Optisure Remote employs an advanced chilled mirror technique which enables it to directly measure dewpoints in the range 40 to 194 F 40 to 90 C Section 1 1 details the operating principle 1 1 Operating Principle The Optisure Remote hygrometer operates on the chilled mirror principle whereby the sample gas is passed over a polished mirror surface the temperature of which is cont
44. nnector alarms pressure transducer connector and the trace heated line power connector are located on the rear panel UrSCONPCT PONER SUPPLY XAF REMOVE COVER kag Figure 2 4 Exterior Layout May 2012 6 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 2 5 1 Controls and Indicators C Instrument display Partitioned to show 4 main panes each of which can be configured to display one of the eight available output parameters A second area of the display shows a stability graph and other process related data Refer to Section 3 4 Function keys Refer to Table 3 1 for the details of these keys Front Bear 5 Remote temperature probe Socket for remote Pt100 temperature probe 6 pin Lemo socket USB communications port Used for connection to an external computer system for running application software optional Alarms Socket for Process and Fault alarm outputs Each alarm has one set of potential free changeover relay contacts common COM normally closed N C and normally open N O The Process alarm can be configured to operate at a specified level on any of the measured or calculated parameters Refer to Section 2 6 3 Analog output connector Three 2 wire output channels CH1 CH2 and CH3 each of which may be configured to give either a 0 20mA or a 4 20mA current loop output or a 0 to 1000 mV voltage signal representing any one
45. note instrument specific parameters stored in the instrument s flash memory The register maps following Table D1 Tables D2 to D14 define the data allocated to each bit byte of that specific register May 2012 5A Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Address Address Function Read Default Register Register dec hex Write Value Config Map definition Hex uration 0 0000 instumentAddress Rot MH X J INSTID TS 0001 0002 0003 0004 0005 0006 0007 0008 0009 000A Ppmw sf6 Lo Word 000B 000C 000D 000E RESSURE P PPMV_HI P PMV LO PPMWSF HI PPMWSF LO 000F Flow Value 0010 Mirror Condition MIRROR COND HP DRIVE STATUS DCC HOLD TIME MEASURE TIME PHASE TIME HRS PHASE TIME MIN SEC FILM THICKNESS L 0012 0013 DCC duration Hold Time Duration minutes D 0014 Measurement Time Hours Minutes 0015 Phase Time Hours 0016 Phase Time Minutes Phase Time Seconds ND 0017 Film thickness setting IVE FILM THICKNESS AX MAT IN MA1 AX MA2 H 0011 Heat Pump Drive I 0018 Live film thickness value i j Li L R m O R lt pec u 7 ae BENE L sl 0 NENE INNEN NN COOR LB E R i lt R ie O ee a pm Rw RW O R RW LB dp 0019 Analogue 1 output maximum value RW 001A Analogue 1 output minimum value RW 001B Analogu
46. or Refer to Section 3 5 6 for details of the connection of this cable The serial port protocol is as follows Baud Hate 9600 Start Bits 1 Data bits 8 Parity None otop bits 2 Typically a Modbus RTU message is structured as follows Byte 1 olave Address Value 1 247 Byte 2 Modbus Function Code Value 3 e g read register Byte 3 otart Address Low byte Value 0 255 Byte 4 otart Address High byte Value 0 255 Byte 5 No Registers to read Low byte Value 0 255 Byte 6 No Registers to read Low byte Value 0 255 Byte 7 Error Check Value F2 2 Register map All the data values relating to the Optisure Hygrometer are stored in holding registers Each of these registers is two bytes 16 bits wide Some of these registers contain instrument specific values e g its own unique system address emitter drive values etc and others are used to hold specific real time data e g measured dewpoint temperature Each MODBUS message has a two part address code one for the low byte bits 0 through 7 and one for the high byte bits 8 through 15 The facility exists for multiple registers specified by a high and low byte contained in the query message to be addressed and read by the same message Table D1 describes the instrument s registers with their respective address locations together with their relevant register configurations and register map definitions Note Hexadecimal Hex addresses marked with an asterisk in Table D1 de
47. or s body collar back along its axis away from the instrument to release the lock and then gently pull the connector body out of its socket NOTE Do not attempt to pull it out with the cable make sure that the collar is first released May 2012 12 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 2 6 6 USB Communications Port Connector This communications port connector cable is supplied as standard 1 Check the orientation of the connector and gently push it into the socket labelled USB see Figure 2 8 2 To remove the connector pull it out of the socket by holding the connector body Do not attempt to remove it from the socket by pulling on the cable IE Sz lt Figure 2 8 USB Port Connection 2 6 7 Dewpoint Sensor Connection The dewpoint sensor contains the optical system and the chilled mirror It is also fitted with a bayonet connector to allow it to be controlled by the instrument Figure 2 9 Dewpoint Sensor 1 Before connecting insure that the sensor mirror surface is fully cleaned See Maintenance Section 5 for cleaning details 2 If the sensor is installed within a sealed gas system it must be installed securely without any possibility of leaks Insure that the sample flow across the sensor is correctly regulated 3 The gas connection
48. place to prevent any system which is connected to the outputs from receiving a false reading After the DCC period has finished the measurement period commences during which the control system decreases the mirror temperature until it reaches the dew point The sensor will take a short amount of time to home in on the dew point The length of this stabilization time depends upon the temperature of the dew point When the measurement is stable the Sensor area of the display will indicate CONTROL The end of a DCC cycle re sets the interval counter meaning that another DCC will start by default in 4 hours time Once the measurement is stable HOLD will release and the analog outputs will resume their normal operation At this point the STATUS area of the display will change to MEASURE May 2012 24 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 3 6 2 SETUP SETUP mode is used for changing system control parameters each of which are selected from the Setup Menu page Initially when the Setup Menu page is opened DCC is highlighted and all the sub menus and data fields relating to DCC are shown together with their current settings For first time operation these will be the default settings relating to DCC To select any of the other parameters e g LOGGING OUTPUT 1 etc use the A up and W down keys to scroll through the list When it is highlighted any Setup Menu page item can be selecte
49. quiring values to be entered this key is used to reduce the currently selected value Scroll up key Operates in a similar manner to the W down key but scrolls up Within sub menu levels requiring values to be entered this key is used to increase a currently selected value Scroll right key From a highlighted pane in the Front Page display this key is used to scroll down and highlight one of the six remaining parameters available for display Scroll left key From a highlighted pane in the Front Page display this key is used to scroll up and highlight one of the six remaining parameters available for display Also used to step back one menu level Enter or Select key Operation of this key from the Front Page display causes the Main Menu to be displayed Options highlighted by use of the Aa up and W down keys are selected by operation of this key Within the Variable Menu Pages this key is used to select the highlighted option Table 3 1 Function key operations May 2012 16 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 3 4 Instrument Display The display and the associated function keys form the operator interface Figure 3 2 shows a typical Front Page default display while the instrument is running in the MEASURE mode Dewpoint 11 46 Temperature Adp 0 1 C 2 1 E 42 Status MEASURE Duration 00 14 22 Helative humidity Process ON 53 02 rh Faut OFF Sensor CO
50. raded desiccant and rust particles is possible use a particulate filter on the sample input line Refer to Kahn Instruments for technical advice Use high quality sample pipe fittings Wherever possible always use stainless steel tubing and fittings This is particularly important at low dewpoints since other materials e g nylon have hygroscopic characteristics and adsorb moisture on the walls of the tubing giving rise to slower measurement response and in certain circumstances false dewpoints For temporary applications or where stainless steel tubing is not feasible high quality PTFE tubing which exhibits similar qualities to stainless steel may be used In order to maximize response time always use the shortest run of tubing and the smallest diameter possible taking care not to induce pressure differentials by aiming for too high a flow rate through too small a diameter Kahn Instruments supplies a range of precision pressure fittings suitable for use with the Optisure Remote Contact Kahn Instruments for details of the items available Gas samples Generally if the sample gas in conjunction with water vapor is not corrosive to base metals it will be suitable for measurement by the Optisure Remote Gases containing entrained solids should be filtered before application to the Optisure Remote Care should be taken with gas mixtures containing potentially condensable components in addition to water vapor e g oil to Insure
51. rameters to the Kahn Humidity Calculator D 3 C to F calculation PRT simulators are used to input simulated temperatures measured in C into both measurement channels For each measurement channel the corresponding display is set to read the input temperature in F For each channel the temperature reading on the instrument display corresponding to the series of simulated PRT inputs is read and recorded Each of these readings is then compared against a corresponding temperature calculated from the following formula Conversion formula F C 9 5 32C 4 RH Calculation PRT simulators are used to input simulated dewpoint and ambient temperatures measured in C into both measurement channels For each pair of inputs the reading on the Instruments RH display is recorded Each of these readings is then compared against a corresponding RH value calculated by inputting the same parameters to the Kahn Humidity Calculator May 2012 44 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual D 4 Conversion of bara to psia and kPa Use a calibrated 4 to 20 mA source to simulate a range of applied pressures covering the instruments full pressure measurement span of 0 to 8 bara 0 5 bar mA Note The Optisure is currently limited to 30 psig 2 bara For each input current record the display reading for all three units For each display reading calculate the corresponding pressure in the relevant un
52. reach the dew point e to determine whether the instrument is controlling by switching MAXCOOL on for a short period and then switching back to MEASURE This will depress the mirror temperature briefly and when it is switched back to MEASURE the control loop should be able to stabilize the mirror temperature at the dew point again 3 6 5 Frost Assurance System Technology FAST Theoretically it is possible for water to exist as a super cooled liquid at temperatures down to 40 F 409C A gas in equilibrium with ice is capable of supporting a greater quantity of water vapor at a given temperature than a gas in equilibrium with liquid water This means that a measurement below 32F 0 C taken over water will read approximately 10 lower than the same measurement taken over ice When turned on the OPTISURE Remote s FAST system identifies when the measured dew point is between 40 F and 32 F 40 C and 0 C and automatically decreases the mirror temperature until a pre determined film thickness of condensate is detected thereby ensuring a guaranteed frost formation The mirror temperature is then increased to above the initial measured dew point but maintained below 32 F 09C and the excess condensate is driven off the mirror The system then controls for dew point based on the frost formation Once ice has formed it will remain as ice until the temperature is raised above 32 F 0 C The measurement state can then be guaranteed
53. ressure transmitter for pressure correction of ppm v and ppm w EMC Class A Emissions Complies with EN61236 1997 A1 A2 A3 Industrial Location Immunity Complies with EN61236 1997 A1 A2 A3 May 2012 49 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Intentionally blank Page May 2012 50 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Appendix F Modbus May 2012 51 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Intentionally blank page May 2012 52 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual F 1 MODBUS RTU communications F1 1 Introduction Optisure Hygrometers have a Modbus communications interface via the USB port that enables remote access to the instruments configuration and data logging facilities This protocol offers two way communication between a host PC known as the master unit to one or more instruments termed slave units Once communication is established by the master unit reading or writing to holding registers within an addressed slave unit is possible The master unit can obtain measured values and status information by reading registers and can respond to data contained within these registers by writing back The following tables list these registers as they apply to the Optisure Hygrometer and specify the number and data formats that apply to each register F 2 B
54. rolled by a peltier heat pump The mirror is cooled until moisture condenses on its surface An optical system is used to detect the point at which this occurs and this information is used to control the mirror temperature and maintain it at the dew point The system operates by illuminating the mirror with an LED The light reflected back is measured by a photodetector and this amount of light is recorded as a reference point As moisture builds up on the mirror the level of light reflected will decrease By comparing this signal with the reference point at any time the system will be able to control the peltier drive circuit to either heat or cool the mirror in order to find and maintain the dew point The core of the mirror contains a Pt100 platinum resistance thermometer which accurately measures the mirror surface temperature this temperature is equal to the dew point May 2012 1 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 2 INSTALLATION 2 1 Safety It is essential that the installation of the electrical and gas supplies to this instrument be undertaken by competent personnel 2 2 Unpacking the Instrument Inside the shipping box should be the transportation case containing the OPTISURE Remote and all the accessories listed below Figure 2 1 Unpacking the Optisure Remote Hygrometer Open the transportation case 5 and unpack carefully as follows Save all the packing material
55. rpose eciric Shock Risk 5 2 Fuse Replacement If the instrument fails to operate after it has been connected to an AC power supply 85 V to 264 V 47 63 Hz and switched on proceed as follows 1 If the power supply cable is eguipped with a fused plug switch off the power supply remove the plug check and if necessary replace the fuse If the instrument still fails to operate after fitting the fuse and switching the power supply on proceed as follows see Figure VA A 7 z REE V U 6 LETU o 53 B i U B m TIUS AMPH AMET i lee e Figure 5 1 Power Supply Fuse Replacement 2 Switch the instrument s ON OFF switch 1 to OFF isolate the external power supply and remove the IEC power connector 2 from the instrument s power socket 3 3 Locate the fuse holder 4 and pull it out of the connector housing 5 A small screwdriver inserted under the lip may be useful in order to pry it out May 2012 2g Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 4 Replace the fuse cartridge 6 NOTE It is essential that a fuse of the correct type and rating
56. s Group 1 Class A equipment Emissions and Basic Immunity IEC61000 3 amp IEC61000 4 EN61010 1 2001 Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use Part 1 General Requirements Andrew M V Stokes Technical Director Date of Issue January 2012 May 2012 V Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Abbreviations The following abbreviations are used in this Manual DCC Dynamic Contamination Correction FAST Frost Assurance System Technology MAXCOOL Maximum Sensor Cooling AC alternating current atm pressure unit atmosphere bar pressure unit 2100 kP or 0 987 atm oC degrees Celsius af degrees Fahrenheit COM common DC direct current dp dew point ENT enter select EU European Union ft foot feet g kg grams per kilogram g m grams per cubic meter HMI Human Machine Interface Hz Hertz IEC International Electrotechnical Commission in inch es Nl min normal liters per minute Ib pound mA milliampere max maximum min minute s mV millivolt s N C normally closed N O normally open NO number ppmy parts per million by volume ppmw parts per million by weight PRT Platinum resistance thermometer typically type Pt100 psig pound s per square inch gauge rh relative humidity RTU Remote Terminal Unit scfh standard cubic feet per hour SD card storage device card memory card for storing datalog files Sec seco
57. s for the purpose of returning the instrument for re calibration or any warranty claims Remove the accessories box 4 Lift out the instrument 2 together with its end packing pieces 1 and 3 Remove the end packing pieces 1 and 3 set the instrument down at the site of installation May 2012 D Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual The accessories box should contain the following items 1 Traceable calibration certificate 2 SD memory storage card 3 Optics cleaning kit d USB communications cable 5 Remote Pt100 temperature probe 6 IEC power cable 7 Sensor cable 8 Application software CD 9 Screwdrivers 10 Dewpoint sensor 11 Pressure transducer and cable optional If there are any shortages please notify Kahn Instruments immediately Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 2 3 X Operating Requirements 2 3 1 Environmental Requirements The operational range of the Optisure Remote sensor is dependant on the temperature of the environment in which it is installed The sensor is able to measure dewpoints down to 108 F below ambient temperature and anywhere up to but not including the point of condensation At higher ambient temperatures the cooling ability of the sensor may be slightly reduced 2 3 2 Electrical Requirements The Optisure Remote requires the following electrical supply e 85 V to 264 V AC
58. s for the remote sensor are either via a permanently installed sample port into which the remote sensor can be inserted or via a sensor block see F gure 2 10 immediately attached to the sensor around which the sample circulates Gas sample entry into the sensor block is via couplings that can be installed via s NPT female threads A washer is provided to seal the connection between the sensor and block May 2012 13 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 4 If the sensor is to be positioned into a sealed but open environment e g a glove box environmental chamber or area to be monitored insure the sensor is suitably secured to prevent any movement and that it is located in a position that will see a representative flow of the sample to be measured 5 Connect the remote sensor cable to the sensor and to the instrument via the connector on the rear panel The connector is a 2 part bayonet fitting Insert the cable part and rotate until the polarization lugs engage Rotate the outer collar of the cable mounted part in a clockwise direction and at the same time push the connector halves together to assist the mating The connection is made in a of a turn of the outside collar part 6 If the remote temperature probe is to be utilized insure that the probe is suitably secured to prevent any movement and that it is located in a position that will see a representative flow of the sample to be measured
59. t Connections sicir dan nn 11 2 6 4 ROMAE PRT Fe a da a EA N 12 2 6 5 Remote Pressure Ines e ss ool c ute AEA ai TARARE Ras 12 2 6 6 USBKOMINUNIEGUOTIS PO LONN CIOT iu aa dv a a EEEE EE 13 2 6 7 Dewpoint Sensor CoDIE CHO sasn na js 13 2 7 Pressure ME Slejas as ass da S 14 F OPERAE IN 0 a S a S LS 31 1 50 s zs ars MIR re n Te ETT 1D Pa S 15 3 2 Preparation for Operation scs ss nn S N E IDUDUE 15 noa al 2 PG Eie CNRC OO LOL T 15 3 3 mee l a ss N N UELUT 16 os SEP R e r a nas bn Ded RM IUD 17 3 4 1 Operational Data Display sese ee ta I ePEIS INIM TM NISI INA I MU M HII NUES MM RID D 17 3 4 2 operational IIS DP m on nn un 18 3 5 IT TUE ss ss a A UE LEN 419 mo elee h FBI a tib ra J js ee n 21 3 6 1 operand Lee T idi 3 6 2 ETP i S 22 3 6 3 DCC Dynamic Contamination MN T I T TT dd 3 6 4 NEV 4 16 BG 30g clue 0 PT 23 3 6 5 Frost Assurance System Technology FAST sese eee 23 3 6 6 eXT Ehe a E 24 3 6 7 Borges T e TOT TT TET ji j S 24 May 2012 i Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual c AFA ANON SOFT OARE ss N A NN P ri E N NN N NN 25 5 Ma CRS ST e Es 6 S 28 UE 11 lt T nnno mes 28 Bus FIESKED C M S S a nn a nn S 28 5 3 PE Tae aaa EE E TEA E 29 524 Sensor Mirror Clean T U b GOOD MEASUREMENT PKS CJ Even So ne D 31 UMEN RT KIR Mde PRE ETEA arara a ei 31 Oni RIO dirsa N N N N N D 32 7 1 IGP RESI 32
60. t available for display in a second pane on the same screen When the required parameter is displayed press the Enter key The display then reverts to a now revised Front Page 3 4 2 Operational Status Display The status display is shown on the right hand side of the display and details the following Front page amp status display 11 46 c ET 46 0 MIN 1 T Ad 04 Status MEASURE Duration 00 14 22 Relative humidity o Process ON orh Fault OFF S Sensor CONTROL Select view 1 C T1 0 0 MIN 1 md i y 2 1 P Status MEASURE numer Duration 00 14 14 Process ON 53 02 Fault OFF EB Sensor CONTROL A V Select pane TE 1 Stability graph which shows measured dew point Ns y over a user optional duration This time variable 1 42 BA Stability Time is set up within the Display Set Up Relative humidity a Saira Menu refer to Section 3 6 2 53 02 mw 2 A dp value representing the change in dew point over the stability duration as shown on the graph lt lt Select new gt arameter 3 Status indicator which reports which operational i phase the instrument is currently in This will be ewpoint either DCC HOLD or MEASURE 11 46 4 Duration indicator which reports back the time Yare comer s DL in Hours Minutes Seconds format remaining in the 90 Duration 00 13 53 phase currently being displayed in the Status line If 53 02 fan p DCC is OFF then this
61. taining a mild detergent rinse and allow to dry If the filter element is damaged replace the element 6 Clean the fan housing 7 Fit the gauze 2 and the filter element 1 into the filter case 3 and push the assembly back onto the fan housing until it clips into position May 2012 29 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 5 4 Sensor Mirror Cleaning Throughout the life of the instrument periodic cleaning of the mirror surface and optics window may be required The frequency of this depends upon operating conditions and the potential in the application for contaminants to be deposited on the mirror Sensor cleaning is mandatory if the instrument indicates an optics fault The cleaning procedure is as follows 1 Switch off the instrument and remove the sensor from its sample block 2 Clean the mirror surface and optics window with a Q Tip soaked in distilled water If the sensor has been exposed to oil based contamination then use one of the following solvents methanol ethanol or isopropyl alcohol To avoid damage to the mirror surface do not press too firmly on the Q Tip when cleaning Allow the cleaning solvent to fully evaporate May 2012 30 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 6 GOOD MEASUREMENT PRACTICE The Optisure Remote is designed to operate either in a flowing gas stream or in an environmental monitoring situation Its sensor w
62. te colored wires 5 Locate the terminal block over the connector labelled ALARMS and push the terminal block firmly into the connector May 2012 11 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 2 6 4 Remote PRT Probe 1 Rotate the body of the PRT probe connector until it locates in the socket labeled REMOTE TEMPERATURE See Figure 2 7 2 Push the connector into the socket until it locks NOTE Do not attempt to force it into the socket If it will not fit in rotate it until the key locks and it pushes in easily 3 To remove the connector slide the connector s body collar 1 back along its axis away from the instrument to release the lock and then gently pull the connector body out of the socket NOTE Do not attempt to pull it out with the cable make sure that the collar is first released Figure 2 7 Remote PRT Connection 2 6 5 Remote Pressure Transducer Optional 1 Rotate the body of the pressure transducer connector until it locates in the socket labelled PRESSURE TRANSDUCER 2 Push the connector into the socket until it locks NOTE Do not attempt to force it into the socket If it will not fit in rotate it until the key locks and it pushes in easily 3 To remove the connector slide the connect
63. that only water vapor is able to condense onto the chilled mirror surface May 2012 31 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 7 CALIBRATION 7 1 Traceability The calibration of this instrument is traceable to national standards For this reason the instrument can only be calibrated in an accredited e g NIST accredited standards laboratory If these facilities do not exist the instrument must be returned to Kahn Instruments The DCC function can be disabled for calibration purposes refer to Section 3 6 3 A calibration certificate bearing a four point calibration is issued with each instrument If required an option is available to add further specific calibration points Contact Kahn Instruments for further information May 2012 32 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Appendix A Technical Specifications May 2012 33 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Appendix A Performance Measurement Range Units Resolution Accuracy Measurement Response Speed Repeatability Remote Temperature Probe Remote Pressure Transducer Range Remote Pressure Transducer Accuracy Technical Specifications 40 to 194 Fdp 40 to 90 Cdp F and C for dew point and temperature RH g m g kg ppmy ppmy SFg for calculated humidities 0 02 F 0 01 C 0 18 F 0 1 C for dew point and temperature 0
64. they are released and will track the selected parameter throughout the measurement cycle The default settings of these analog outputs are Channel 1 Dew point 4 20 mA Channel 2 Temperature 4 20 mA Channel 3 RH 4 20 mA current loop NOTE The analog outputs are only active during the MEASURE phase and so will be off after switch on and remain off until the system enters the MEASURE phase The three analog output ports connections are made via a single 6 way push fit connector block as shown in Figure 2 6 All outputs are 2 wire positive going signals referenced to a common 0 V line To differentiate between the outputs it is recommended that a black lead be used for each of the COM common lines and a separate color for each of the positive lines May 2012 9 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual For each output 1 Remove the terminal block fitted into the analog output socket 2 Strip back the wire for the common black connection to the CH1 output exposing approximately 6mm 0 25 in wire insert the wire into the COM1 terminal way and screw into the block Do not overtighten the screw 3 Strip back the wire for the signal e g red connection to the OP1 output exposing approximately 6mm 0 25 in wire insert the wire into the OP1 terminal way and screw into the block Do not overtighten the screw 4 Repeat operations 1 and 2 for the other analog outputs selecting a differ
65. tion of gas pressures higher than the specified maximum will result in potential damage and may render the instrument unsafe and in a condition of incorrect functionality Only personnel trained in the safe handling of high pressure gases should be allowed to operate this instrument Refer to Appendix C Technical Specifications in this Manual 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 May 2012 iv Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual EC Declaration of Conformity MICHELL Instruments EC Declaration of Conformity Manufacturer Michell Instruments Limited 48 Lancaster Way Business Park Ely Cambridgeshire CB6 3NW UK We declare under our sole responsibility that the product S8000 Remote complies with all the essential requirements of the EC directives listed below 2004 108 EC EMC Directive 2006 95 EC Low Voltage Directive LVD and has been designed to be in conformance with the relevant sections of the following standards or other normative documents EN61326 1 2006 Electrical equipment for measurement control and laboratory use EMC requirement
66. tored list of 8 MIN Defines upper span limit MAX Defines lower span limit OP3 TYPE mA Sets output type 4 20mA 0 20mA or 0 1V PARAMETER rh Sets output parameter monitored list of 8 MIN 0 2 Nl min Defines upper span limit MAX Nl min Defines lower span limit 1 PARAMETER Defines process parameter to be monitored ALARM SETPOINT Sets process alarm trigger point 75 CONTRAST Sets contrast level adjust to suit RESOLUTION 2 Sets display resolution No decimal places PRIMARY UNIT Sets temperature unit C or F LANGUAGE Sets display language STABILITY TIME Sets time scale for stability graph FAST Sets Frost Assurance facility ON OFF PRT OUTPUT 1 OUTPUT 2 OUTPUT 3 SCISE English DISPLAY min Adjust to local time as required Set to local time and date at despatch CLOCK Note Current time example only Displays current instrument and display firmware issue details for information only mE Select to return to Front page display Table B 1 Default set up parameters Software issue ABOUT information O O May 2012 37 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Appendix C Formatting SD Cards May 2012 38 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual Intentionally blank page May 2012 39 Kahn Instruments Inc Optisure Remote Optical Hygrometer User s Manual 1 Formatting SD cards Be

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