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1. Note Teflon shield insert ltem 15 Inside of nipple 0 1000 OHM TEMPERATURE RTD SHIELDED 1 14 0 46 32 FLAT HEAD MACHINE SCREW 4 20 0 30 24 x 3 8 SS CAP SCREW 2 19 0 ELECTRONIC MODULE 1 18 0 EXPLOSION PROOF ENCLOSURE 1 47 0 02 MOUNTING BRACKET 1 16 0 TEFLON SHIELD 1 15 2 1 1 4 3 Sch 40 SS Nipple 1 21 0 2 2247 1476 Viton A Parker O Ring 2 13 0 2 108 V1476 Viton A Parker O Ring 1 12 0 2 218 V1476 Viton A Parker O Ring 1111 0 2 226 V1476 Viton A Parker O Ring 2 10 0 X750 INCONEL SPRING 1 9 DELTA C 3 SENSOR BARREL 1 8 2 LOWER INSULATOR 1 7 ALL DIMENSIONS IN INCHES TECHNOLOGIES INC 4 UPPER AND LOWER COLLAR 216 i LE UNLESS OTHERWISE SPECIFIED ENDERBY BRITISH COLUMBIA TOLERANCES UNLESS 1 UPPER INSULATOR 1 4 TITLE OTHERWISE SPECIFIED DRAWNBY R Pelletier DC 1510 PART ASSEMBLY 4 UPPER END CAP 1 3 x 0030 FRACTIONS 1 16 0 SENSOR PLUG 1 2 XX 0010 ANGLES 05 ae 1 SENSOR PLUG UPPER GUIDE TUBE fe APPROVED BY SCALE 5 ES REV MATERIALS DESCRIPTION DRAWING QTY ITEM Se DATE DRAWING ASSEMBLY 10 0 1510 Parts assembly Figure 42 Installation in pump by pass line Mainl2. 13 OPERATOR INTERFACE 13 CALIBRATION 14 Temperature ege ENEE EENEG 14 ES Calibrate Simple m a X 15 CE Calibrate Full E 16 CC Calibrate Temp Compensation 17 CN Calibrate Narrow 18 CW Calibrate Wide ee ete BA AL 19 CO Calibrate Analog Output nete n te e RE tes 20 ED Calibrate Density uda un eR eie dete ge e eee 21 SA EEN e NEE 23 Set BS amp W Ayera NO 24 SO Set Output Avera enone re diee reete terere ep 24 Set Temperature Averaglng ico Gee p eme eee ete de rhet ea oda p ca ee age 24 SD Set Density Averan E be OR Ut RE e IH ee e E ez eee 24 SUS Set Wits ciet trt eet ete ane o ctetuer verte eec Mi ume pere 24 SV Set Temperature Units ee RR pe p ea eem etii Rea 25 SC tte vetet E Ee eaten 25 DB Display Water Contenciosa o do cus 25 DC Display Modify Calibration eese nennen 26 DI Display Information eterne reet ita 26 MODBUS 29 5 1 GENERAL 29 5 2 COMMUNICATION SETTINGS 29 5 3 MASTER SE
3. 30 5 774 7 12 8 325 1mm 1 yo e 3 0 76 2mm Figure 5 DC 1510 Dimensions 37 6 4 161 5mm gt A 1 NPT 32 69 830 3mm 19 75 O 501 7mm lt 1 90 48 3mm Figure 6 DC 3510F Dimensions 38 11 280 mm Flange size to be specified Figure 7 DC 3510FL dimensions 39 6 32 SS FLAT HEAD MACHINE SCREWS 20 10 24 3 8 SS SCREWS 19 ELECTRONIC MODULE 18 EXPLOSION PROOF ENCLOSURE 17 WO2 MOUNTING BRACKET 16 PLASTIC SHIELD INSERT 15 1000 Ohm TEMPERATURE RTD SHIELDED 14 ALUMINUM ELBOW CONNECTOR 13 4 316 SS WAFER 12 INCONEL 1 SPRING 11 1 25 x 4 SCH 40 SS NIPPLE 10 VITON 0 25 x 0 437 x 0 0937 O RING 09 VITON 1 25 x 1 162 x 0 93 O RING 08 316L SS END CAP LOWER 07 1 1 2 SCH 40 3161 SS BARREL 06 316L SS END CAP UPPER 05 A
4. 70 83dAN HOLVINSNI JINYHO VIGINN109 AgH3aN3 S3IDO TONHO3 L 9 W1130 ejddiu jo episuj 8 uei Ost Dous uojjo 9JON ISNV 006 0S 7 9 6 53715 SONILVY cL WALI ALON 31419348 3SIMH3HLO SSSINN S3HONI NI SNOISNAWIG Ty S0 W3ddfi dvo SS 191 90 MOT SS 1916 OV HOS 2 1 1 40 U3MO1 AVI ANJ 1916 80 EEN COP LX SZ NOLA 60 ONIH O 256070 X 7570 X SZ 0 NOLA DL 37991 SS 09 HOS EN SZ TANOONI le E 3ONV 13 38 SS 8081 E FL AHS 018 38n1VvH3dWa1 uuo 0001 SL I1H3SNI 146 NO1431 91 I335VU8 ONILNNOW ZOM AL 3HTISOTONH JOOUd NOISO 4X3 8 FINGOW 9INOH19313 61 SMUOS dVO SS 8 5 2 018 02 val SMHS 3NIHOVIN 1V13 SS 26 98 Figure 9 DC 1510F Parts assembly 41 17
5. Do not use the binary transfer option The unit will respond with strings of dots as the download progresses It may take three to five minutes for the download to be completed and the string of progress dots may not be displayed at a steady rate with some terminal programs please be patient At the end of the download the unit will respond with Start 0x88000 FLASH 29 616 Total 41 219 bytes Check 0x012F1728 LDR gt Note the Start value will always be 0x88000 for the BS amp W The other values will be different with future versions of the application 6 Type the command G to start normal operation of the analyzer Of course the unit can also be restarted doing a power down and up If the concluding information Start E 0x88000 does not appear in five minutes something has occurred to stop the transfer and the unit should be powered down and up again and Program cycle should be re started again 2 0 ASSEMBLY AND INSTALLATION 2 1 Sensor Assembly Model DC 1510 only Assembly Instructions If the analyzer needs internal cleaning and this cannot be done by back flushing with a solvent do not try to disassemble the unit at the installation site Disconnect all piping and electrical connections and take the unit to the shop to allow for proper re assembly When re assembling make sure that all the O rings are clean and covered with heavy grease before tightening the threaded connections Some threaded
6. if the current mode is CN or CW the temperature coefficient will not be shown and cannot be entered This is because these calibration methods use a more sophisticated algorithm and the temperature coefficient is more complex than the single value used in the legacy methods DI Display Information 26 This command will list various hardware and software version information and serial number that can be useful for troubleshooting purposes The information will be similar to Flash ID 0x22DF AM29F100B RAM Size 0x10000 S N 0423011 H W Level Ver 1 2 BS amp W V200ah 27 BLANK PAGE 28 5 0 Modbus interface 5 1 5 2 5 3 5 4 General This instrument allows Modbus access to various calculated measurement results and allows modification of some operational parameters Operational parameters that could cause the instrument to stop responding to the master requests are not permitted via Modbus commands but are modified via the RS 232 terminal access This includes such items as Modbus mode baud rate and asynchronous character parameters There is also a restriction on the character length so that if the RTU mode is chosen the character length cannot be set to seven bits Physical access is via a two wire RS 485 port Communication settings Mode RTU or ASCII mode Baud rate 2400 4800 9600 and 19 200 Character length 7 or 8 bits 7 bits not allowed in RTU mode Stop bits 10 2 Parity None
7. CS and CF methods of calibration the temperature coefficient of the oil is required and may be found as follows Provide the means to circulate dry oil the identical type that is used in the field measurement through the measuring cell and a means to heat the oil Start circulating cool oil at normal ambient conditions Use the command DB to display water content temperature and R R is a raw measurement value directly proportional to the dielectric constant These are displayed in the order as above from left to right Ignore the water content value the instrument need not be calibrated for this procedure and note the temperature and R value until they stabilize When stable record the temperature as and R as Rj Apply heat to raise the oil temperature by 10 or more degrees Celsius and wait until the temperature has stabilized Usually a fast and steady oil circulation in a closed loop will increase the temperature provided that the sensor is well insulated Record the new temperature as and as Solve the equation R aT Roy as follows 52 R2 H1 4 8514 Ro R aT Then the temperature compensation factor Tc is determined 100 percent 4 0 CALIBRATION 4 1 Operator Interface The analyzer software is a menu driven system where all tasks related to calibration or viewing guide the operator through the process by lists of questions Whenever a value is required the unit
8. TRIXIE Changing the password Type L at the command level 1 Command for help gt L Responds with Enter Password Type in the password characters will be echoed with asterisks If password is correct the next prompt is to enter a new password as follows otherwise it will jump back to the command level As the new password is typed in the characters are echoed as shown This happens only when a new password is entered otherwise asterisks are shown Enter New Loader Password BUBBLES NOTE Passwords are case sensitive To upgrade a unit that is already running the BS amp W application do the following 1 Type the command Z Enter Password Type in the password The unit should respond with Run Boot Loader Y 2 Type Y The unit should respond with Booting down LDR Loader Mar 24 2003 21 50 19 Flash ID 0x22AB AM29F400B RAM Size 0x40000 Boot Adr 0x1018 LDR gt 3 Type the command L to erase the application and load the new application The unit should respond with Erase existing program and load new program Are you sure Y 4 Type Y This will erase the application area to prepare it for a download The unit should respond with Erasing device and after a few seconds the unit should respond with Erased Load Program The erasure operation takes less than 10 seconds 5 Send the new BSW program using the Send Text File transfer function of the terminal emulator
9. case for most crudes Next prompt is Done Y N esc Type Y if satisfied with calibration N if any changes necessary or esc to abandon updating the operating memory values If the user simply wishes to review the calibration values enter CS and type a cr for every prompt to display the values At the last prompt type esc to return to the top command level Typical values for Tc are Gravity 0 95 to 1 00 gm cc 0 01 Gravity 0 80 to 0 95 gm cc 0 03 Gravity 0 50 to 0 80 gm cc 0 05 Because of the wide variation in Tc it is desirable to test the oil rather than rely on the above estimates The dimensionless units of Tc are in terms of R C Please note that the Tc combines the temperature coefficient of the sensor and the oil The sensor Tc has a positive slope and the oil has a larger and negative slope For some of the heavier crude oils it will appear as if the Tc is zero but actually the two Tes cancel each other Calibrate Full This is the normal full accuracy calibration method for the DC 1510 DC 3510F Analyzer It allows partial calibration to be done as circumstances permit then when all required values are known the working coefficient memory may be updated With this advanced method laboratory standard calibration can be achieved for the actual oil in use by drawing samples during this process analyzing them in the lab and entering the results into the monitor at a later date All data is stored in n
10. ground Maximum loop load is 600 Ohms RS 232C Terminals 7 8 and 9 are provided for RS 232C communications Terminal 7 18 common terminal 8 is RD and terminal 9 is TD The analyzer is the computer and the configuring device is a Dumb Terminal The Dumb Terminal should have a screen with a minimum of 8 lines and 65 characters per line If the configuring device is a computer a program such as Terminal or HyperTerminal that are included with the Windows operating system may be used to emulate a terminal For downloading updated software a computer is required When computers are used as terminals RD and TD must be reversed when wiring the RS 232C port It is recommended that shielded cable be used between the terminal and the analyzer with no less than 20 AWG conductors and not exceeding 300 feet in length RS 485 Terminals 10 and 11 are used Terminal 11 is the A line terminal 10 is the B line according to RS 485 convention Temperature Input Terminals 12 and 13 are used for the temperature sensor input connections To test the RTD disconnect it and measure the resistance and temperature Then consult the RTD tables Relay Contacts Terminals 14 and 15 provide a normally open contact This contact is isolated and rated for 2 Amps 24V DC non inductive load An inductive load snubber is required to prolong the life of the relay contacts An inductive load is a load like an external relay or an el
11. lt esc gt to exit 1N 0 0224 52 71 C 1 069492 997 94 kg m 3 1N 0 0224 52 71 C 1 069492 997 94 kg m 3 To exit press esc Display Modify Calibration This command allows a review of the complete set of calibration data in the working area In addition the data can be modified to allow recovery in case of accidental changes The numbers shown are only examples actual numbers depend on each unit s calibration Typing DC will show Display Modify Calibration Curve 1F Ratio 1 1 069492 Water Content 1 0 1100 Temperature 1 25 44 C Ratio 2 1 164575 Water Content 2 10 1100 Temperature 2 26 05 C Temperature Compensation 0 0250 C Ratio 1 For each item presented on the last line the operator may type in a new value or just press cr to keep the current value that is then displayed and the next item prompted At the end of the list the question Done Y N esc is presented As for the calibration routines typing Y will replace the working data with the data just modified The temporary memory area used by the calibration routines is also updated by the Y response Typing N erases the current value before typing in an updated value If no changes are required then esc may be pressed at any point to return to the top command level Notes If the curve displayed with DC has been calibrated for wide range operation the there will be three points shown with the above command Also
12. minimize foaming Rubber hoses with valves or Quick Connects Use One Liter total Volume for ease of computation including the volume of the hoses pump Vane hand pump and DC 1500 Smallest size barrel pump will do size for 72 or less rotations per gallon Sloped bottom 15 mandatory No exceptions allowed Use a 10 qt gasoline funnel To sample connections Pr d Surge Tank Calibration Procedure Shut off both valves to the sample line Drain the sensor probe through the bottom valve Connect the hand pump hose to the bottom connection Pour one litre of currently used dry oil into the surge tank 5 Operate the pump and watch for the oil to circulate through the upper hose back into the surge tank 6 Circulate the oil slowly enough to prevent foaming 7 To get the second calibration point as per the Instruction Manual dump a 53 cubic centimeter volume of water into the surge tank and wait until the reading code DB on the terminal is stabilized while pumping the oil around 8 The oil sample now has a 5 96 water content of suitable accuracy for calibration purposes 9 Enter calibration data as per the Instruction Manual 5 KH HS 1 2 3 4 Note establish the temperature coefficient of the particular oil used the oil needs to be heated about 15 to 25 F Use a dipstick heater or electric coil heater coffee cup warmer and insert this in the surge tank while watching the temperature measurement on the
13. must be higher than the elevated zero Because there is no interaction between the zero scale and full scale value the scaling procedure need only be done once Calibrate Density In order to use the density signal the densitometer calibration factors must be entered These factors are unique to each densitometer and are listed on the Calibration Certificate that was supplied with the densitometer The following example is just that an example and the factors shown will not be correct for the actual densitometer in service To calibrate the densitometer type the new command CD program responds with 21 Calibrate Density KO 1 315507e 03 K1 3 013561e 01 K2 1 357348e 03 K18 4 836800e 04 K19 6 103510e 01 Coefficient 0 K0 The coefficients listed the first time will be garbage don t be concerned about this Type in each coefficient exactly as shown on the Calibration Certificate The steps should look as follows Calibrate Density KO 1 000000e K1 1 000000e K2 0 000000e 00 K18 0 000000e 00 K19 0 000000e 00 Coefficient 0 K0 1 315507e 03 Coefficient 1 K1 3 013561e 01 Coefficient 2 K2 1 357348e 03 Coefficient 18 K18 4 836800e 04 Coefficient 19 K19 6 103510e 01 Done Y N esc Type Y at this point Calibration values can be reviewed at this point by typing CD if correct press the esc key to get out After this typing DB will show 22 S
14. screen of the terminal Circulating the oil over an extended time will heat up the oil about 5 to 10 degrees also Using one quart of dry oil with two ounces of water results in 5 88 water content increase Drawing 941215 Figure 13 DC 1510 calibrator for non volatile liquids only 45 IBM compatible computer DC 1510 DC 3510F DB9 connector 15 pin screw connector GND SO Qo oq OO Gei amp 9 O o9 9 9 9 9 9 Use a terminal program to communicate with the DC 1510 DC 3510F For Windows use the Terminal or HyperTerm program that is included with it Figure 14 Computer connection wiring diagram 46
15. to match the display scale If N is typed it will proceed to the full scale trim esc aborts leaving previous calibration intact Typing Y shows the following HELP instructions 20 CD Use one of the following increase output coarse increase output fine increase output nudge decrease output coarse decrease output fine decrease output nudge cr to accept calibration lt esc gt to abort calibration pre Each press of the upper case U increases the current output for fast change use the auto key repeat available on most terminals by holding the shift and the U key down Once the output is close to the desired 4 mA value use the lower case u to reach it at a slower rate For very slow exact adjustment use the and keys When satisfied with the zero value press the cr to bring up the next prompt Calibrate Full Y N As for the zero trim use the U u D d and keys to reach the desired value followed by a cr Now the prompt is Done Y N esc Typing Y completes the calibration and places the values into permanent memory It may be noted that 4 mA is not the lower limit of the current output but is in fact 0 mA If so desired the low end could be set to any value For units with serial numbers 0014001 to 0014100 built in limiting holds the current output between 4 and 20mA Similarly the full scale output may be set at any value with an upper limit of about 24 mA but it
16. A Display BS amp W Curve 1 type lt esc gt to exit IN 100222 ppm 53 67 1 357986 869 53 kg m 3 1N 100226 ppm 53 71 C 1 357999 869 50 kg m 3 1N 100225 ppm 53 75 C 1 357996 869 47 kg m 3 Set Alarm Alarm conditions are continually monitored and signaled according to operator defined values The pick up and drop out values may be defined as well as a time delay to avoid tripping on transient conditions The different pick up and drop out levels provide hysteresis to avoid rattling the alarm relay It should be noted that alarm pick up means that the alarm relay will in fact be de energized if the water content exceeds the pick up value This is a normal fail safe type of arrangement for cases of power failure or program failure The Model DC 1510 DC 3510F also has a watchdog timer resetting the processor and dropping the alarm relay if the program runs amok Typing SA gives Alarm Pick up 40 Number 1 indicates curve in use each curve has its own alarm settings If only the dropout value is to be changed or just examined then a cr will show the value and advance to the next step Otherwise type in the desired value and a cr to advance 1N Alarm Drop out 90 Again the value may be changed or observed and then move to the next step 1N Alarm Delay sec Type in a new delay followed by a or er only to keep the old value The maximum delay is approximately 43 million seconds Next
17. DELTA C Water in Oil BS amp W Analysers MODELS DC1510 amp DC3510 Instruction Manual Issue date August 23 2005 Rev 2 1 1 0 1 1 1 2 2 0 2 1 2 2 3 0 3 1 3 2 4 0 4 1 4 2 5 0 TABLE OF CONTENTS INTRODUCTION 1 MULTI CURVE OPERATION 1 UPDATING THE PROGRAM 2 Password protection 52252252 25 28 e EL IR cdit pe o pre eie 2 Changing the password i tete e erre re eee ceret Red de eoe ias 3 ASSEMBLY AND auda 5 SENSOR ASSEMBLY MODEL DC 1510 ONLY 5 Figure 1 Thermowell hole alignment to case 4 40 6 ANALYZER INSTALLATION 6 Mechanical Installation ed ee ds 6 7 CALIBRATION 9 MULTIPLE CALIBRATION METHODS 9 BASIC THEORY 9 Figure 2 Ratio vs water 10 Figure 3 Ratio vs water content and nennen enne 11 CALIBRATION
18. LL DIMENSIONS IN INCHES UNLESS OTHERWISE SPECIFIED Note Item 12 Flange Rating Sizes 4 6 8 8 150 9004 ANSI Note Plastic shield insert Item 15 Inside of nipple DELTA TECHNOLOGIES INC ENDERBY BRITISH COLUMBIA CERAMIC INSULATOR UPPER 04 CERAMIC INSULATOR LOWER 03 TOLERANCES UNLESS OTHERWISE SPECIFIED SENSOR PLUG IMPREGLON COATING 02 144220516 SS GUIDE TUBE Ia ke ka fo Jo fo fo ka ka fo ka La ka J J kal 01 REV MATERIALS DESCRIPTION DRAWING QTY ITEM Xx 0 030 FRACTIONS 1 16 0010 ANGLES 0 5 20 005 DRAWN BY R Pelletier DATE March 30 2004 TITLE WATER OIL ANALYZER DC 3510FL PART ASSEMBLY APPROVED BY SCALE NTS DATE DRAWING PART ASSEMBLY REV 00 Figure 8 DC 3510FL Parts assembly 40 ATSWASSV 1H Vd 5005 01 gei 31va 10 A3H SIN 31 95 d G3AOHddV 5005 01 494 ava AT8W3SSV 1HVd 40156 20 Jenelled y Ag YSZATYNY H31VM 9000 XXX 50 S3 ONv 000 9111 ewou wu 000 nu ONIMVYG NOlLdIHOS3Q S IVIH3 1VIN 10 dni 309 91 0 20 NOTER AR 8 45 931370395 JSIMH3HIO 5581 S3ONVH3T1OL 50 1 OINVH3O
19. Master setting timeout All operational settings are stored in flash memory and this process takes some time When a command that changes some configuration value is issued by the master the data 1s written into flash memory then the response is sent This confirms that the data was written 1f there is a correct response from the analyzer to the master This write process takes somewhat less than 250 msec and we recommend that the master be set for a timeout value of 500 msec minimum Modbus configuration Various communication parameters are set up using the RS 232 terminal access The command for this is CM The response is as follows and the example shows the factory default values Configure Modbus Address 1 Protocol Mode RTU Float order normal Baudrate 9600 Char Len 8 Bits 29 Stop Bits 1 Stop Bit Modbus Address 1 255 At this point type in the desired slave address followed by a carriage return next item shown Modbus Protocol Mode 0 ASCII 1 RTU Select 0 or 1 For this selection and the following current value is marked with an asterisk type in the desired setting from the suggested choices or just carriage return if the current value is acceptable Modbus Float order 0 normal 1 reverse Select 0 or 1 Indicates the order of the bytes that make up floating point numbers Normal means that the higher order byte is sent first and reverse means that the lowest order byte i
20. TTING TIMEOUT 29 5 4 MODBUS CONFIGURATION 29 5 5 MODBUS ADDRESS ASSIGNMENTS 31 5 6 HYPERTERMINAL SETUP 32 6 0 APPENDICES ita 35 6 1 SPECIFICATIONS 35 GOTTA NN 35 Mechanical M 35 ee Ee ANN 35 OUPO T 2 35 TERMINAL COMPUTER INTERFACE nnmnnn 35 6 2 DIAGRAMS 36 Figure 4 Terminal A O 36 Figure 5 DC 1510 1015 37 Figure 6 DC 3510F Dimensions 38 Figure 7 DC 3510FL dmenstong 39 Figure 8 DC 3510FL Parts assembly 40 Figure 9 DC 1510F Parts assembly esi ieia 41 Figure 10 DC 1510 Parts assembly eiie aii aan 42 Figure 11 DC 1510 Installation 43 Figure 12 DC 1510 nennen nene nennen nnne tnter enne 44 Figure 13 DC 1510 calibrator for non volatile liquids only 45 Figure 14 Computer connection wiring dagram sese eene nennen eene 46 iii International Moisture Analysers IMA Limited Phone 44 1943 878877 Parkwell House Otley Road Fax 44 1943 879988 Guiseley West Yorkshire LD20 8BH email sales ima co uk ENGLAND Web www ima co uk 1 0 INTRODUCTION The Type DC 1510 DC 3510F analyzer consists of a microprocessor based elec
21. atory analysis and later entry press the esc button This stores the partial calibration data in the temporary area for later use This data is not lost if power fails CW Calibrate Wide For wide range operation 0 50 water a curve fit algorithm is used to conform to the arithmetically non linear nature of the process This requires a three point calibration procedure rather than the two point method used for narrow range 0 5 operation Recommended points are around 0 20 and 40 for full range operation Narrower spacing of the points is allowed by the software however the calibration and subsequent measurements will be less accurate when measuring outside the calibrated values This is not to say that a narrower calibration is always discouraged for example if the operating range is expected to be 0 30 then the calibration points should be 0 15 and 30 As for Calibrate Narrow it is necessary that the CC Calibrate temperature Compensation be performed prior to proceeding with CW Proceed as follows With fluid of around 20 water content circulating through the cell type CW response 1s Calibrate Wide Measure Point 2 now Y N Type Y if ready in response the analyzer will display the R value and temperature the presents the following Water Content 2 ppm CO Type the known water content followed by a carriage return Next prompt is Measure Point 3 now Y N Change the water conte
22. connections should not be undone after initial factory installation These connections are on both ends of the 1 25 conduit nipple Part 21 and on both ends of the sensor barrel Part 08 to the 2 collars Part 06 All mentioned threads are secured with Threadlock compound When disassembling the sensor remove the electronic module first to prevent damage to the RTD temperature probe Before removing the sensor barrel with the two collars from the respective other components mark the associated components first THIS IS IMPORTANT When ready to reassemble after cleaning the parts start at the bottom end by clamping in the lower end cap in a bench vise Do not forget to install the compression spring before the insulator is inserted in the end cap Take the sensor barrel with the two collars and screw one end onto the end cap Gently tighten the 2 threaded connection while making sure that the shoulder of the collar seats firmly on the end cap Now install the sensor plug by inserting 1t from the top end of the barrel making sure that the end of the plug fits into the hole of the lower insulator Test the spring action by pushing down on the guide tube and be sure that the 1 4 O ring 1s in place on the guide tube The upper end cap is still attached to the 1 25 conduit nipple and the electrical housing Inspect the 1 5 O ring between the upper insulator and inside the upper end cap and apply ample amounts of grea
23. densate 0 001 water 0 0015 water C 1000 Ohm platinum RTD 32 F 300 F 0 C 150 C 42 lbs 19 1 kg Type 316 SS or Duplex SS 2160 psig E 100 F 15 MPa 38 C 257 F 125 C 185 F 85 C 40 F to 185 F 40 C to 85 C 40 F to 185 F 40 C to 85 C 1 NPT or 1 and 2 flanged Specific volume Sensor cross section flow area Electrical Power Required Enclosure Output Analog current Maximum load Isolation voltage Relay contacts Adjustable delay Adjustable hysteresis 0 070 U S gallon 235 ml 2 2 Approx 0 75 inch 4 84cm 18 28 VDC 150 mA Grounded or ungrounded Hazardous area Class I Div 1 Gr C amp D EEx d IIB T4 zone 1 IP65 4 20 mA DC isolated self powered 600 Ohms 500 Volts peak SPST NO 2 Amp 24V DC Non inductive 0 43 million seconds 0 49 90 water Terminal Computer Interface RS 232C Speed Word size Parity Stop bits RS 485 Full duplex 9600 Baud 8 Bits None One Half duplex application specific 35 6 2 Diagrams O e O 2 B 9 24VDC Power input Densitometer com Densitometer signal 4 20 mA 4 20 mA Com RD RS 232C I O TD RS 485 1 0 Relay 2 AmpNormally Open r4 Figure 4 Terminal Wiring 36 6 4 w 162 6mm Three connections 1 amp 3 4 NPT amp M20
24. e Compensation Measure Point 1 now dry oil Y N Answer Y and proceed with the next prompt Measure Point 2 now dry oil Y N Apply heat to raise the oil temperature by 25 or more degrees Celsius 45 degrees Fahrenheit and wait until the temperature has stabilized Usually a fast and steady oil circulation in a closed loop will increase the temperature provided that the sensor is well insulated Type Y and next prompt is Done Y N esc Type Y and the compensation values are calculated and stored Calibrate Narrow If the water content is expected to be in low percent range a simpler two point calibration is available This is similar to the Calibrate Full however the measurement calculations will also account for the temperature induced changes in the dielectric constant of water It is necessary that the CC Calibrate temperature Compensation be performed prior to Calibrate Narrow With desired wet oil circulating through the cell type CN response is Calibrate Narrow Measure Point 2 now Y N Type Y if ready in response the analyzer will display the R value and temperature the presents the last prompt Water Content 2 ppm Type the known water content followed by a carriage return Next prompt is Done Y N esc Type Y if the water content was accurately known and the calibration data will be stored in operating memory If the point s water content is not known but a sample was taken for labor
25. e known and well controlled This and the application of sophisticated algorithms using a microprocessor allows the DC 1510 DC 3510F to deliver stability and accuracy unmatched by others A further benefit of this instrument is that it can be used to accurately determine variables necessary for its own calibration Temperature compensation is provided by an RTD input to the microprocessor The RTD input shifts the calibration curve in the microprocessor proportionally with a change in temperature This shift is assumed to be linear with small temperature changes and small water percentages 1 1 Multi curve operation To accommodate various density oils fifty separate calibrations and alarm settings are available Each curve is fully independent of the others as are the alarm settings Also each curve may have one of four methods of calibration All other functions such as analog output are common that is there is only a single 4 20 mA output calibration 1 2 Current active curve is indicated by a bracketed number at the beginning of the command line like this 1W Command for help gt The number indicates the curve number while the letter S F N or W or space indicates whether the calibration for that curve is simple full narrow range wide range or uncalibrated respectively Also when commands like DB are executed the curve number is displayed at the end of the line for each calibration type as follows Di
26. ectric solenoid valve that has a coil A suitable snubber for a DC coil would be a diode whose cathode is connected to the more positive terminal of the coil The Electrical Code allows only AC and DC voltages of less than 30 volts for this instrument Do NOT attempt to use any higher voltage A suitable 2 5 amp fuse in the hot supply circuit should be used to protect the relay and circuit board traces against accidental burn out To provide fail safe operation a normally open contact is provided When the unit is powered up and the water content is below the alarm point the contacts will be closed On power failure or measurement above the alarm setpoint the contacts will open and trip the user s annunciator 3 0 CALIBRATION THEORY 3 1 3 2 Multiple calibration methods Four calibration methods are available for the DC 1510 DC 3510F analyzer Two Calibrate Simple and Calibrate Full are the legacy procedures that allow simpler but less accurate operation These are strictly for narrow range i e 0 5 operation and the temperature compensation method accounts only for the behaviour of the oil component Calibrate Narrow and Calibrate Wide are upgraded to account for the temperature behaviour of water in the emulsion as well as that of the oil As the names suggest Calibrate Narrow is for low range operation while Calibrate Wide allows operation over the 0 50 water range The wide range is a curve fit procedure t
27. hat accounts for the nonlinear behaviour of water in oil emulsions consequently it requires a three point calibration Warning Only one set of calibration data is stored for each curve regardless of the type of calibration The consequence of this is that if a curve is calibrated via the CF command this data is invalid for the newer CN method or vice versa Switching from one method to the other will destroy the previous calibration data Basic theory For low water content in the range of O to 5 the variation of dielectric constant with water concentration may be considered to be reasonably linear and is of the form R ax b where R ratio value proportional to dielectric constant x concentration of water in oil a slope b intercept Figure 2 Ratio vs water content To completely characterize the curve two known points are necessary These are shown in Fig 2 as R and R2 During the calibration process the DC 1510 DC 3510F analyzer measures and R and the corresponding x values are supplied by the operator This equation by itself is not adequate for measurement because the dielectric constant is also significantly affected by the oil temperature The dependency for most oils is negative such that the dielectric constant decreases with increasing temperature The combination of the two effects describes a plane as shown in Fig 3 below 10 Temperature Figure 3 Ratio vs
28. ine flow Line pump Upstream shut off valve A on sample line must be wide open Use only the downstream shut off valve B to throttle the sample flow Use 1 or 3 4 steel pipe or 1 2 steel tubing for sample line Sample line flow velocity must not be less than 4 feet per second Figure 11 DC 1510 Installation Diagram 43 ee ZTN Alarm light oy HA PH 4 20 mA Analyzer PT 25A X HA d gt lt Local Display 1 O Line pump Hazardous Area Non Hazardous Area RS 232C 9600 Baud 30 metres max RS 485 9600 Baud 1 000 metres max PC Terminal d or Laptop E 24 VDC 18 Power Supply E 24VDC 0 3A E PT 15B PLC 110 240 VAC to 24 VDC Note Sample take off point should be as close to the pump discharge as possible lt 5 Pipe dia Maintain a high flow velocity in the sample line by not over sizing the line size lt 1 Keep the sample lines short and prevent flashing in the sample lines Install 1 Quick Connect fittings on second set of inlet and outlet ports for hose connection to flushing fluid pump Diesel Varsol or equal Figure 12 DC 1510 Application 44 Make hose long enough to keep discharge under the liquid yd surface to
29. nt of the fluid to about 40 allow it to stabilize then type Y and continue with water content entry as for point 2 The last prompt is Done Y N esc Type Y if the water contents were accurately known and the calibration data will be stored in operating memory If the points water contents were not known but samples were taken for laboratory analysis and later entry press the ese button This stores the partial calibration data in the temporary area for later use This data is not lost if power fails Calibrate Analog Output The analog output of the DC 1510 DC 3510F Analyzer requires a stable current meter to measure the current during calibration The meter s accuracy should be in the 4 1 2 digit class because the monitor output is very stable and has a resolution of 1 part in 65 536 or 0 0015 of full SPAN Typing CO will show Calibrate Output Zero Scale Output The question being asked is what water content should represent zero scale value This could be 0 00 or some elevated span zero such as 2 00 The desired value should now be typed followed by a cr If the existing value is only to be examined press the cr only Next prompt is Full Scale Output Similarly type in the water content for full scale output or just a er to examine current value Next prompt is Calibrate Zero Y N At this point the monitor is asking if you wish to proceed with trimming the output at 4 mA or any other value
30. of measurement is shown For example when the alarm delay is to be set the menu question will show that the number is in units of seconds the operator does not have to type the units in this case Some special keys are used by the analyzer esc The key marked ESC cr The key marked ENTER or RETURN bs The key marked BS BACKSPACE or the left arrow del The key marked DEL or DELETE The following general rules apply to the operation of the analyzer 1 Typing esc aborts the current command and leaves previous values intact 2 Whenever a number is required the following keys are allowed 0 through 9 decimal point bs erases last entered character del erases last entered character esc abort numeric entry return to command level cr accept current number If no new numbers have been typed on the current line then it will retain the old value This is a way to examine previous calibration values without disturbing anything 3 Whenever Y N is required the following keys are valid Y accepts the current values N leaves the old information intact and moves to the next question cr leaves the old information intact and moves to the next question esc aborts the current command without changing previous values 4 Commands are not case sensitive password is When the monitor is waiting for a command the following is displayed 1N Command for help gt The capital letter within the bracket
31. ommand all calibration data can be restored by typing in previously recorded values If a mistake has been made but records were kept use esc to abort and restore the data using the DC command This avoids the need to repeat the full calibration procedure Calibrate Temp Compensation This method of temperature compensation is required for CN and CW calibrations The software will calculate the correct factors automatically and place them in the calibration data set of the current curve number The results are not shown and the operator cannot enter them manually CN Furthermore for the subsequent CN or CW calibration one of the two dry oil points is retained as the first calibration point This avoids having to repeat one step in the calibration sequence To determine the temperature compensation factor proceed as follows Provide the means to circulate dry oil a sample of the type that is used in the field measurement through the measuring cell and a means to heat the oil Start circulating cool oil at normal ambient conditions Use the command DB to display water content temperature and R R is a raw measurement value directly proportional to the dielectric constant These are displayed in the order as above from left to right Ignore the water content value the instrument need not be calibrated for this procedure and note the temperature and R value until they stabilize When stable type CC Response is Calibrat
32. on the display Done Y N esc If done type Y otherwise type N or a cr and it will go back to the beginning of the alarm set menu 23 SB SO ST SD SU Note that pressing esc anytime during the SA sequence will abort back to the command level and the values before the menu was called are retained but the just typed values are all discarded Although the delay may be set in increments of one second the actual delay has about a three second uncertainty The alarm relay is only changed during the few milliseconds between measurement cycles This is done to prevent any errors in measurement due to noise from load switching Set BS amp W Averaging If the user wishes to decrease the effect of random noise that affects all measurements averaging may be applied The method used is window averaging that is a running average of the last number of measurements is displayed This number can be a maximum of 64 Keep in mind that each measurement takes approximately 3 seconds so that a large number will result in sluggish response Set Output Averaging As for the input measurement averaging can be applied to the 4 20 mA output The maximum value is 64 Set Temperature Averaging Similar to the previous averaging commands the temperature values can be averaged The maximum value is 256 Again keep in mind that each measurement takes approximately 3 seconds so that a large number will result in sluggi
33. on volatile memory so that partial calibration data is not affected by power failures 16 CC Before calibration make sure that samples can be drawn for analysis and that the oil contains some water for at least one of the two calibration points For full calibration proceed by typing CF the response is Calibrate Full Curve 1 Measure Point 1 now Y N Type Y then immediately draw a sample for analysis Record the displayed R value as and temperature as The next prompt is Water content 1 If the value is known exactly as may be the case for lab test stands type it in followed by cr to store it in memory Otherwise type N for entry at some later date Similarly follow the above procedure for point 2 The last prompt for data is Temperature Compensation C SIGN REQUIRED NOTE The temperature compensation value entry requires the negative sign if the coefficient is negative Type in the correct value then cr to advance to Done Y N esc If all values have been entered type Y This places the data in working memory If calibration is incomplete type esc The missing data will be entered later If any item needs to be modified type N This will begin the CF procedure again It is also advisable to keep a permanent written record of the calibration values in case of accidental modification or instrument repair but not replacement Using the DC Display Modify Calibration c
34. op see figure 11 The user must be sure that this sample represents a true composition of the main line flow The unused top connection of the sensor is a convenient location to install a sample draw off vent valve Electrical Installation The Type DC 1510 DC 3510F analyzer has been designed for installation in a Class I Div 1 Gr C amp D area The electrical installation must conform to the requirements of applicable local electrical codes Refer to Figure 4 for details in the terminal connections Power Supply Terminals 1 and 2 are provided for the power input with 1 as negative and 2 as positive The power supply voltage required is between 18 and 28 V DC and can be grounded or ungrounded The power supply input is fully isolated from ground to allow use of standard ground fault detectors in D C power systems An internal self resetting fuse protects against catastrophic failure no spare fuse is required Densitometer input This instrument is designed to accept a frequency input from the Solartron family of densitometers For hazardous area application an intrinsically safe barrier must be used This is described in the densitometer user s manual Note that only the exact type of specified barrier may be used Analog Output Terminals 5 negative and 6 positive are used for 0 4 to 20 mA output The DC 1510 DC 3510F powers the loop To prevent ground loop problems the analog output is fully isolated from instrument
35. re two effects involved one is the change in dielectric constant of water and the other is that of the oil Behavior of water well known but the temperature related change oil is unique to each particular oil For oils this decrease is a zero shift and shows as an apparent decrease in water content of approximately 0 03 water per C with most light crudes however it can be significantly different CS In order to compensate the DC 1510 DC 3510F Analyzer is able to measure the oil temperature in the measurement cell It measures the temperatures during calibration calculates normalization factors and applies a supplied correction factor so that the correct water content is measured It also accounts for the temperature related behavior of water in calculations during measurement The instrument may be used to determine very accurately the correct temperature compensation factor component of the dry oil Although the temperature factor above is shown in terms of water per C for purposes of transferability the DC 1510 DC 3510F uses the units of per C This is in fact the percent change in dielectric constant dimensionless per degree Celsius Calibrate Simple There are instances when the instrument is installed and it is not possible to perform a proper two point calibration but one still wishes to operate the monitor The CS calibration function provides for just such cases however performance is much less accurate for
36. s N in the above case indicates the current calibration method for the curve 4 2 Calibration The analyzer is calibrated with a computer terminal using an RS 232C interface Calibration should be carried out in the following sequence 1 Determine temperature compensation of the fluid 2 Perform water content calibration using either Calibrate Simple Calibrate Full Calibrate Narrow or Calibrate Wide 3 Perform analog output calibration and alarm relay setting if desired A help menu is available on the computer terminal that displays the available commands This menu is accessed by typing the key and displays CC calibrate temp compensation CS calibrate simple CF calibrate full CN calibrate narrow range CW calibrate wide range CO calibrate output CM configure Modbus CD calibrate density SA set alarm SB set BS amp W averaging SO set output averaging ST set temperature averaging SD set density averaging SU select BSW units SV select temperature units SC select curve DB display BS amp W DC display modify Calibration DI display information lt ESC gt exit abort The calibration steps and these commands are explained in greater detail on the following pages Temperature Compensation An emulsion of water in oil exhibits a temperature dependency such that an increase in temperature causes a decrease in the mixture s dielectric constant There a
37. s sent first followed by the three remaining bytes Continue with setting the remaining parameters in the same manner At the end the usual prompt asks Done Y N esc If settings are OK type Y otherwise N or carriage return to begin the settings procedure again 30 5 5 Modbus address assignments Name Modbus data Data type address Water content 0000 Single float Temperature 0002 Single float R 0004 Single float Density 0006 Single float Alarm status 1000 Integer Water content unit 2000 Integer Temperature unit 2001 Integer Number H O average 2002 Integer Number Temp average 2003 Integer Select curve 2004 Integer Set float byte order 2005 Integer Units R W Eng Eng Eng Eng DADA R W R W R W R W R W R W Command Value units 03 03 03 03 04 04 06 04 06 04 06 04 06 04 06 04 06 Kg m 0 No alarm 1 Alarm 0 1 0 C 1 F 0 Forward 1 Reverse Note Only curves that are fully calibrated are allowed to be selected If the master attempts to select an uncalibrated curve response will be a message indicating the current curve Also a new uncalibrated analyzer will have curve 1 as default and will respond with data even though it is uncalibrated 31 5 6 HyperTerminal setup HyperTerminal needs to be set up properly in order to communicate with the analyzer The configuration file named DC 1510 ht is available from Delta C Technologies Inc and the only item
38. se to the O ring There should be good lubrication at this point Make sure no grease is allowed to spill on top of the insulator as this will attract moisture between the guide rod and the surrounding metal causing measurement drift later Before inserting the top insulator in the seal housing prepare the installation of the RTD sensor in the insulator by applying a drop of heat conducting grease in the thermowell hole in the insulator The RTD must be properly anchored in the thermowell by inserting a small piece of solid plastic wire insulation or equal on top of the RTD 2 2 The plastic wire should have an OD to 0 1 inch to get a proper friction fit The length of this plastic insulation should be about 0 75 inch long After inserting the insulator line up the RTD wire with the electrical enclosure as shown in figure 1 and make sure it stays this way when tightening the threaded joint Now lift the electrical enclosure and upper end cap with insulator and slip the subassembly over the guide tube Top view of explosion proof housing Connector for contact rod 10 Screw Holes Thermowell hole Figure 1 Thermowell hole alignment to case Note Thermowell hole in the insulator must be on a line that is at 90 to the line through the 10 mounting screw holes Now lower the module to the bottom of the enclosure while making sure that the bronze contact rod has a slight friction fit when inserted into the guide tube and that
39. sh response Set Density Averaging Density averaging values can be set to a maximum value of 256 Set Units The analyzer can display water content in units of or parts per million The selection is made as follows Typing SU brings the following response Set Units 1 ppm 2 Select 1 or 2 The asterisk before 1 or 2 shows the current units Typing the appropriate number results in 24 SV SC DB Done Y N esc Typing Y yields the response Set Units Done Set Temperature Units Temperature may be displayed in units of C or F Type SV response is Set Temperature Units 1 C Celsius 2 F Fahrenheit Select 1 or 2 The asterisk before 1 or 2 shows the current units Typing the appropriate number results in Done Y N esc Typing Y yields the response Set Temperature Units Done Select curve One of fifty curves may be selected for current operation typing the command results in the response Select Calibration Curve Current Curve 1 Select 1 50 Type the desired number Done Y N esc Typing Y yields the response Set Curve Done IN Command 2 for help gt Display Water Content This command will continuously display the current water content the temperature the Ratio and density in that order If there is no densitometer present or it has failed NO DENS will be displayed in the density value position Display BS amp W Curve 1N 25 DC type
40. splay BS amp W Curve 1S Display BS amp W Curve 1F Display BS amp W Curve 1N Display BS amp W Curve 1W Display BS amp W Curve 11 Updating the program The program in this instrument is stored in flash memory which means that the user is able to upgrade to newer versions as they may become available This requires a computer that has a terminal program that can download text files For Windows operating systems this can be Terminal or HyperTerminal as provided for Windows 3 1 and Windows 95 respectively The user is directed to the terminal program s Help facilities for a detailed explanation of how it operates NOTE When changing settings such as baud rate in HyperTerminal it must be in the disconnected mode The DC 1510 3510F analyzer s program is in fact two programs one is a loader program that is always present and the other is the actual application that performs the measurement function The special commands used for program updates are not explicitly shown on the help screen because the inadvertent execution can remove the measurement function so one should be very sure that it is indeed intended Password protection Password protection has been implemented for the loader function to prevent accidental or unauthorized destruction of the measurement program Password can be changed only by knowing and using the current password via the command L Units are shipped from the factory with the password
41. that may need change is the selection of the Com port Tf the setup file is not at hand HyperTerminal can be set up as flows Start HyperTerminal via the Start Programs Accessories Communication Hyperterminal selections Press the off hook button Select File Preferences this brings up the following window DC 1500 Properties 2 USE CONT TEE E Redialion busy At this point ensure that the correct com port is shown If not select the appropriate one 32 Next press the Configure button to set the port parameters as shown in this screen shot COM1 Properties Press OK and select the Settings tab in the Properties window 33 DC 1500 Properties Ensure that the selections match the above then press ASCII Setup and Terminal Setup buttons and ensure that the settings match those following Terminal Settings ASCII Setup Finally press OK and OK to close the window then File Save As name it DC 1510 34 6 0 APPENDICES 6 1 Specifications General Water in Oil range Minimum sample flow rate Resolution Temperature stability Temperature sensor Temperature compensation range Shipping weight Mechanical Construction material Maximum working pressure Maximum fluid temperature Maximum ambient temperature Operating temp for electronics Storage temp for electronics Sample line connection size 0 00 to 50 00 4 USGPM for oil no wax 9 USGPM for con
42. the RTD element stays inserted in the insulator The RTD wire is pulled through the slot in the mounting bracket Gently pull on the wire to test if the RTD stays in the thermowell hole Do a hydraulic pressure test up to 3240 psig and check for leaks Hold for 5 minutes Analyzer Installation Mechanical Installation The analyzer is normally installed in a vertical position with flow from bottom to top This helps prevent the accumulation of gas bubbles in the probe assembly An adequate circulation rate is required to prevent water separation in the probe assembly For oil service a minimum rate of 4 USGPM is recommended If the oil has a high wax content a flow rate of 20 GPM may be required to prevent wax built up on the sensor elements The cross sectional flow area of the sensor is about 0 75 sq inch For condensate service a minimum rate of 9 USGPM is required This liquid has a tendency to separate from any free water quite easily and high flow rates through the sensor will help to prevent this from happening The maximum rate is limited by the amount of driving force available However care must be taken to prevent any gas breakout of volatile liquids with a low bubble point in the probe assembly caused by very high flow rates A sample stream of liquid is normally passed through the probe assembly The driving force can be supplied by a small pump by a restriction in the main line or by a pump discharge to suction by pass lo
43. this mode than the specifications Furthermore this mode of calibration will not compensate for the temperature coefficient of water only that of the oil whereas CN and CW perform full temperature compensation Even so the intelligence built into the DC 1510 DC 3510F allows the addition of accurate data to bring calibration to full accuracy at a later date This mode is a single point calibration using one measurement and an intelligently estimated slope value supplied by the operator To calibrate the instrument using the single point method and proceed as follows At the top command level type CS Machine responds with Calibrate Simple Curve 1 Number will reflect curve in use Measure point now Y N At this point a sample of the oil should be drawn and Type Y The response is to display the raw value R and the temperature followed by the next prompt Water Content 90 Type in the known water content the character does not have to be typed and cr which advances the menu to CF Slope dR d Water slope Figure 3 An intelligent estimate of the slope must now be supplied If it is not known then use an estimate of 0 0300 for common crudes The next menu item is Temperature Compensation C SIGN REQUIRED Type in the compensation value If not known use 0 030 for light crudes NOTE The temperature compensation value entry requires the negative sign if the coefficient is negative as is the
44. tronics unit mounted on a caged probe A 1000 Ohm RTD assembly is mounted in the probe and provides a temperature input to the analyzer The analyzer uses the capacitance principle A cylindrical sensor and outer barrel are fixed in size and distance from each other and form the electrodes of a coaxial capacitor The oil sample flows between the plates as a dielectric fluid changing the capacitance of the assembly proportionally with the change in dielectric constant of the fluid The measured capacitance is converted to a water content output signal by the microprocessor and associated components Although the capacitance approach to the measurement of water in oil is sound in principle previous methods have had limited success This is caused by the difficulty of measuring the small capacitance change of a large standing value and implementing accurate compensation for the effect of temperature changes on the dielectric constant Indeed some instruments do not even make the effort In any measurement system accuracy depends on the number and stability of the components involved in the signal chain Analog circuits used in other instruments even those that incorporate digital displays have of necessity many components that add errors at each stage of the signal processing with the consequent inferior performance In contrast the DC 1510 DC 3510F analyzer s design reduces the primary dependency to a single component whose characteristics ar
45. water content and temperature The correspondence to Figure 2 is that the temperature variation simply shifts the curve up and down in the R x plane The additional information required is the temperature compensation which along with the temperature measurements characterizes the plane Note that this describes only the effect of temperature on the dielectric constant of the oil Waters temperature induced dielectric shift is also considered by the measurement software when calibration is performed using CN and CW An emulsion of water in oil exhibits a temperature dependency such that an increase in temperature causes a decrease in the mixture s dielectric constant This decrease is a zero shift and shows as an apparent decrease in water content of approximately 0 03 water per C In order to compensate the DC 1510 DC 3510F Analyzer is able to measure the oil temperature in the measurement cell It measures the temperatures during calibration calculates normalization factors and applies a supplied correction factor so that the correct water content is measured The instrument may be used to determine very accurately the correct temperature compensation factor Save Although the temperature factor above is shown in terms of water per C for purposes of transferability the DC 1510 DC 3510F uses the units of per C This is in fact the percent change in dielectric constant dimensionless per degree Celsius When using the
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