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130-76 - Model 900 Viscometer - User Manual

1. 10 Sec Gel 10 Min Gel ZS UN a PV is always displayed in cP YP is displayed in the shear stress units selected in SET UP see page 19 to set shear stress units 8 CEM By pressing this button once the viscometer will automatically measure calculate and display shear stress dial readings as per API Recommended practice 10 This automation enables the technician to simultaneously perform other tasks It also assures increased accuracy and reproducibility as each test is conducted in the same manner and for the same time periods a Press CEM The viscometer will automatically begin ramping up to 300 RPM and back down taking readings at specific intervals along the way At each interval the viscometer maintains the RPM speed for 10 seconds for stabilization and then records a reading If you prefer not to wait for the 10 minute Gel test you may hit NEXT to cancel that particular operation while still obtaining readings on everything else that was measured The RPM intervals at which data is gathered include 3 RPM 6 RPM 30 RPM 60 RPM 100 RPM 200 RPM 300 RPM 200 RPM CONDOR WN gt To eS he ON Fr ee NN Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 21 b 9 100 RPM 10 DO RPM 11 30 RPM 12 6RPM 13 3 RPM 14 10 second Gel Wait 10 seconds 15 10 minute Gel Wait 10 mi
2. OFITE Dependable Products From People You Trust Model 900 Viscometer 130 76 C 115 Volt 130 76 1 C 230 Volt ORCADA Model 900 Software Instruction Manual Updated 8 10 2015 Ver 8 0 Patent No 6 766 028 OFI Testing Equipment Inc OFI Testing Equipment Inc 11302 Steeplecrest Dr Houston Texas 77065 U S A Tele 832 320 7300 Fax 713 880 9886 www ofite com Copyright OFITE 2015 Table of Contents NEE OG UG HOM BEEN 2 DISS CHU UIO BEE 2 Bel ul e En EE 3 Specifications EE 4 Eege 7 SCUD BEE 8 SoftWare EE 10 Calibra en EE 14 SLING EE EE E 14 EE tee ENEE 16 elle ere 18 MAUI EE 19 LIC ONS tess fine carer chia ancl clesncitas N NTA 19 WIN COMPLE EE 23 SONWANE EE 25 OD TOITS piee ie she eeh 25 Save Ral EE EE EE 26 TOS BUG Cl cirin a 2 Select Analysis Outputs ssececcncesctceskctandiccteieiticnartacsadeteaieiiinks 30 Saved Test Dal EE 31 calpain FISTO ca E suetedseadeaeliesueet eae 33 MPO deele GE 34 Onboard Program Manager 35 Upload OSE DNA EE 37 NES e UE 39 VI ANTICO nei EE 39 Bob Shaft Bearing epnlacement 40 Main Shaft Bearing Fepnlacement 44 Torsion Spring epnlacement 46 7249 011 400 LEE 47 Thermocouple Caliraton 47 POJUSUNO MEP ET 49 TransQucer Lineartzaton sitiseni a a a er 50 DAVOT INSTA EE 53 COUPEN EE 56 Warranty and Return Policy ccccccsseseeseeeeeeeeeeeseeeseneseneseees 57 Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Ho
3. 5 Unscrew the three hex screws on the arms of the spring mounting plate 6 Remove the spring mounting plate Motor Torsion Spring Set Screw Zero Calibration Knob Transducer Spring Mounting Plate Standoff Notch Torsion Spring Motor Transducer Sensor Board m Sensor Je Kee e A Spring Mounting Plate Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 40 7 Remove the two screws holding the transducer sensor board in place 8 Unscrew the three standoffs 9 Pull the bearing guide up and out of the body 10 On units with a KlikLock bob unscrew and remove the upper magnet assembly Use the supplied bob shaft wrench 130 76 08 to hold the bob shaft immobile This will prevent damage to the stop pin and torsion spring Torsion Spring Transducer Bearing Guide Upper Magnet Assembly Bob Shaft Lower Bearing Retainer Ring Bearing Guide Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 41 11 Remove the external retaining ring from the bob shaft beneath the lower bearing d This retaining ring is intended for one use only It must be discarded and replaced after removing it from the shaft Note 12 Gently pull the bob shaft with the transducer still
4. Changes the shear stress measuring units that are displayed Enter selection number or leave alone if unchanged 1 Dynes cm 2 Pa Pascal 5 b ft 3 lb 100ft 4 D R Dial Reading Press ENTER and then NEXT Used to calculate an association with a mechanical viscometer Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 19 d Shear Rate Units Changes the shear rate units Enter selection number or leave alone if unchanged 1 RPM 2 1 s Reciprocal seconds Press ENTER and then NEXT e Spring Changes the Torsion Spring Assembly F0 2 F0 5 F1 0 F2 0 etc Aspring number will be displayed New Enter selection number or leave alone if unchanged Press ENTER and then NEXT f Temperature Units Either C or F will be displayed New To change temperature scale from existing one Enter selection number or leave alone if unchanged 1 C Celsius 2 F Fahrenheit Press ENTER and then NEXT g Temp Control Determines how the temperature is to be controlled Either 0 or 1 will be displayed New To change from existing mode 0 Auto Temperature controlled from Viscometer 1 Manual Temperature controlled by Heat Cup Knob Press ENTER and then NEXT This will take you back to the beginning Press CLEAR STOP h Temperature Of
5. field on the main screen However the Save Rate Settings feature provides more control over data save points The software will monitor each selected variable and record a data point to the file when that variable changes by the amount specified 1 Select Save Rate Settings from the Edit menu 2 Place a check mark next to each variable you wish to monitor 3 Inthe field after the variable name enter the variance required to initiate a save point For example if you want the software to record a data point when the temperature increases or decreases more than 5 place a check next to Temperature and enter 5 in the field next to it 4 Click OK to save the settings and return to the main screen Elapsed Time seconds since the start of the test RPM rotational speed RPM Shear Rate rotational speed 1 s RPM SP rotational speed setpoint Temperature measured sample temperature Temperature pH temperature reading from the external pH meter Temp SP temperature setpoint Temp Duty Cycle the frequency in seconds the heaters engage to increase the temperature Viscosity measured viscosity cP Shear Stress measured shear stress Shear Stress Tare change in measured shear stress pH pH reading from the external pH meter Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecres
6. 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 9 Software Start The OFITE Model 900 Viscometer can be operated from a PC using the ORCADA Model 900 software When operating under computer control the keypad on the Model 900 is disabled and all operation is controlled from the PC If your computer does not have a DB 9 serial port but does have a USB port it is recommended that you purchase a USB to Serial converter that uses the FTDI chipset OFITE part number 130 79 19 is one such converter but others are available It is critical that any converter used has the FTDI chipset Using a converter without the FTDI chipset could result in poor communication erroneous results or even damage to your machine The computer must be running Windows 2000 or newer For optimum viewing it is recommended that your computer s display be set to 1024 x 768 pixel resolution 2 Double click the ORCADA icon on the desktop The first time you run the software you will be asked to select a hardware configuration Select the the appropriate device and click OK You will now see the Main Screen The Windows XP firewall may try to block the ORCADA software from communicating with the viscometer If the firewall shows the following alert select Unblock windows Security Alert P To help protect your computer Windows Firewall has blocked some features of this
7. Error Log Set Name Remove from List Seng Enable Ethernet Comms Search for Devices Refresh A J Enable Serial Comms Default Device Status Not Found 13 Click the Start Transducer Calibration button The transducer calibration will run automatically for about 20 minutes At the end of the procedure the status screen will disappear Close the TransCal software and open the ORCADA software 14 Calibrate the viscometer through the ORCADA software before running any other tests Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 52 Appendix If using the included Serial to USB Converter cable part 130 79 19 to connect to the Model 900 the PC will require a driver This driver is included Driver Install on the same CD that contains the Orcada software To install the driver 1 Insert the software driver CD to the computer and select the file labeled CDM v2 1200 WHQL Certified exe 2 Aprompt will open asking if you want to run this file Press Enter or click Run Do you want to run this file T SI Name min Desktop CDM v2 12 00 WHQL Certified exe Publisher Future Technology Devices International Ltd Application gt G Users admin Desktop CDM v2 12 00 WHQL V Always ask before opening this file iz gt While files from the Intemet can be useful this fil
8. Fax 713 880 9886 www ofite com 10 Start Test This button starts a test in Auto Mode Once a test is started this button becomes the Abort Test button Click here to stop the test Cement This button performs the same function as the CEM button on the unit s keypad Refer to page 21 for more information Mud This button performs the same function as the MUD button on the unit s keypad Refer to page 21 for more information The Mud and Cement buttons perform standard tests based on API specifications These tests ignore the Dead Time and DAQ Time settings on the Options screen Temperature control which Note is disabled during custom Auto Mode tests is available during a Mud or Cement test Progress This button opens the Test Progress window which shows all of the steps of the current test and highlights the one currently in process Status This box at the top of the screen shows the current status of the test Comm Timeout This light will be off when the PC is successfully communicating with the viscometer If communication is interrupted for any reason the light will shine red to indicate a problem Start Logging This button is available in manual mode only Click here to begin recording test data The light next to this button will sh
9. IEEE 1394 Bus host controllers Keyboards D Mice and other pointing devices amp Monitors KS Network adapters TY Ports COM amp LPT USB Serial Port COM3 DI Processors Sound video and game controllers lt gt Storage controllers cb System devices Universal Serial Bus controllers 10 Open the Options screen in the ORCADA software Choose the COM port listed in Device Manager Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 55 Appendix Grounding Proper grounding protects the equipment operator from the risk of electric shock The electrical cord provided with this equipment has an equipment grounding conductor and a grounding plug Observe the following guidelines at all times Always connect the plug to a matching outlet that is properly installed and grounded lf an extension cord is necessary make sure it has three prongs and is compatible with the electrical cord provided with the equipment Do not modify the electrical cord provided with the equipment If it is not compatible with any available outlets have a compatible outlet installed by a qualified electrician If the equipment grounding conductor solid green or green and yellow is improperly connected the operator will be at risk of electrical shock Never connect it to a live terminal Local codes may require a Grou
10. Test 2 18 37 28 ho FT 205 OT 18 34 15 iel ion 205 18 34 15 18 34 54 jel ocation 205 Test 1 18 34 54 18 35 01 ield Tes ocation 205 Test 2 18 35 01 18 35 08 jel ocation 205 Test 3 18 35 08 Elf FT 206 OT 18 35 58 jel ocation 206 Test 1 18 35 58 18 36 03 jel ocation 206 Test 2 18 36 03 Saved Experiment Explorer 4 On the Raw Data tab you will see the graph of the test results The Analysed Data tab shows the results of the calculations based on the Analysis Model The Test Setup tab shows the parameters of the test xi Raw Data Analysed Data Test Setup Les 7 MV Temperature BAMA Shear Stress BEA IV Viscosity Iw M RPM i kV Temp pH Pe S LES E Eal a go S 5 v uw E ST 0 00 1 Relative Time al 28 13 Shear Vis amp RPM alaj HA k hf Temperature alaj I Relative Time Plot all Tests o eil Experiment _ Test j Comment ee Bye ell Time Length a Export Cement Test 1 RP 108 Cement Test 1 1 _ Thu Nov 09 15 11 24 2 ha Raw Data Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 31 Export Click this button if you wish to export the test data to a file You will be asked to select a filename and destination and then click OK The resulting file can then be opened in Microsoft E
11. during a test Experiment Name This field will be used to identify the experiment later This field is required before starting a test in Auto Mode or starting logging in Manual Mode Bob Select the type of bob currently being used in the unit An incorrect value in this field will adversely affect your test results Key The checkboxes next to the graph key enable and disable graphing of the indicated values For example to exclude RPM from the graph uncheck the RPM box You can also customize the appearance of the lines on the graph by clicking on the line example on the right side of the key Manual Mode Controls The manual mode controls in the bottom left hand corner or the screen adjust the rotor speed and the temperature while the unit is operating in manual mode Rotation This field determines the rotational speed The drop down box beneath the field sets the units to either RPM or 1 s Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 12 Enable Place a check in this box to engage the motor Uncheck the box to stop the motor Temp This field determines the test temperature The drop down list beneath the field sets the units to either F or C Enable Place a check in this box to enable temperature control If the value in the Temp field is hi
12. gel time set point Temp PV temperature process variable This is the actual temperature of the sample S S shear stress Gel S S gel shear stress 300 RPM DR If the Cmd Char is m this will show the 300 RPM dial reading 600 RPM DR If the Cmd Char is m this will show the 600 RPM dial reading PV DR If the Cmd Char is m this will show the plastic viscosity dial reading YP If the Cmd Char is m this will show the yield point dial reading User S S If the Cmd Char is a this will read the average shear stress RPM rotational speed RPM Shear Rate rotational speed 1 s Viscosity average viscosity 3 Click the Export button to export the data to a disk file 4 Click the Save To Disk button to save the data to the Upload Data Explorer to be viewed later 5 Click the Upload Data Explorer to access previously saved data sets Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 37 a Locate the folder for the date of the saved data b Click the small sign next to the folder c Select the data set you wish to view and click OK d The data set will appear on the screen 6 Press the OK button to close the Upload Test Dat
13. test Select the test you wish to view and click the OK button You can now see the graph chart and fluid batch details Click the Export button if you wish to export the calibration results to a file You will be asked to select a filename and destination and then click OK When you are finished reviewing the calibration history click the OK button to return to the main screen P Calibration History Explorer E xj Fluid Batch Comment EHE 2005 Month12 2005 12 0114 23 E A OK Cancel Calibration History Explorer P Calibrate History Ix sr DH 1 1 1 1 I 1 1 1 1 H 1 1 1 1 1 1 1 1 I 1 00 0 90 0 80 0 70 0 60 0 50 0 40 0 30 0 20 0 10 000 O10 O20 O30 O40 O50 0 60 0 70 0 80 0 90 1 00 Raw Shear Stress Temp Out of Range Error Comments Calibration History Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 33 TM i i Softwa re The Import Export feature of the ORCADA Software makes it possible to transfer a test from one PC to another Import Export 1 2 Begin on the Main Screen Choose Export from the File menu Select the tests you wish to export Hold down the CTRL key to select multiple tests Click the Export button You will be asked to choose a destination and filen
14. the above warranty shall extend for an additional period of twelve 12 months from the date of the original warranty expiration for such products In the event that OFITE is requested to provide customized research and development for the buyer OFITE shall use its best efforts but makes no guarantees to the buyer that any products will be provided OFITE makes no other warranties or guarantees to the buyer either express or implied and the warranties provided in this clause shall be exclusive of any other warranties including ANY IMPLIED OR STATUTORY WARRANTIES OF FITNESS FOR PURPOSE MERCHANTABILITY AND OTHER STATUTORY REMEDIES WHICH ARE WAIVED This limited warranty does not cover any losses or damages that occur as a result of e Improper installation or maintenance of the products e Misuse e Neglect e Adjustment by non authorized sources e Improper environment e Excessive or inadequate heating or air conditioning or electrical power failures surges or other irregularities e Equipment products or material not manufactured by OFITE e Firmware or hardware that have been modified or altered by a third party e Consumable parts bearings accessories etc Returns and Repairs Items being returned must be carefully packaged to prevent damage in shipment and insured against possible damage or loss OFITE will not be responsible for equipment damaged due to insufficient packaging Any non defective items returned to OFITE withi
15. 320 7300 Fax 713 880 9886 www ofite com 8 5 Position the rotor sleeve over the bob and move it upwards to join the rotor The threads assure the rotor sleeve will attach evenly and uniformly each and every time Rotor Rotor Sleeve Bob 6 The On Off switch is located on the back panel just above the power cable connection Turn the unit on and follow the display instructions or press CLEAR STOP 7 Refer to the Thermocouple Calibration section on page 47 It is recommended that a calibration procedure be run due to the possibility of mishandling during shipment of the Model 900 Refer to the Calibration Standalone section on page 14 for instructions on calibrating the unit manually Refer to the Calibration With Computer section on page 16 for instructions on calibrating the unit with the ORCADA Software Important 8 Place a properly prepared sample of test fluid if an R1B1 bob is being used approximately 165 170 mL in the sample cup and immerse the rotor exactly to the scribed line on the rotor by raising the platform Tighten the lock nut on the platform 9 When operating under computer control the keypad on the Model 900 unit is disabled and the unit is controlled from the PC However the type of bob being used for the test must be entered in SETUP refer to step 5 on page 19 for details before connecting the unit to the PC Patent No 6 766 028 OFI Testing Equipment Inc OFITE
16. 900 should now display the same temperature 0 2 C as the calibrated thermometer Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 48 Appendix The P value represents the position of the transducer In order to provide Adjusting the P Value accurate readings the P value must be between 20 000 and 21 000 At the beginning of each calibration in standalone mode you will be asked to verify the P value If it is out of range use the following instructions to adjust it The P value must also be adjusted any time the internal components of the viscometer are disassembled This includes replacing the main bearings bob shaft bearings or torsion spring 1 2 Tip Follow steps 1 6 on page 40 to expose the transducer Loosen the screws on the Transducer Clamp Refer to the photo on page 46 Turn the bob shaft counterclockwise and hold it firmly against the stop While holding the bob shaft against the stop turn the transducer until the P value reads approximately 17 000 The P value can be viewed either on the display screen on the keypad or in the ORCADA software To view it in the ORCADA software open the Calibrate Shear Stress screen and find the Shear Stress Raw field Tighten the screws on the Transducer Clamp Carefully place the Spring Mounting Plate onto the three standoffs and secure it i
17. Wrench 130 76 10 Universal Heat Cup 115 Volt Only 130 76 10 1 Universal Heat Cup 230 Volt Only 130 76 24 Bob Shaft Assembly For Threaded Bobs 130 76 241 Bob Shaft Assembly For KlikLock Bobs 130 76 51 Carrying Case 130 79 19 USB to RS232 Cable 132 56 Rotor R1 303 Stainless Steel 132 5 Bearing Shield 132 58 Bob Threaded B1 303 Stainless Steel 132 58 01 Bob KlikLock B1 316 Stainless Steel 132 80 Certified Calibration Fluid 100 cP 10 oz 134 05 2 Bob Shaft Bearing Sealed 134 10 Torsion Spring Assembly F1 0 135 02 External Retainer Ring for Bob Shaft 152 3 7 AC Power Cord 115 Volt 152 38 AC Power Cord 230 Volt Optional 130 76 LSK Low Shear Kit 132 56 S Rotor R1 Slotted 132 58 5 Bob B1 Slotted 134 05 2 Bob Shaft Bearing 134 10 2 Torsion Spring Assembly F0 2 130 76 P pH Meter 132 56H Rotor R1 Hastelloy 132 58 01H Bob Threaded B1 C 276 Hastelloy 132 58 01 HC Bob KlikLock B1 C 276 Hastelloy 134 10 2 Torsion Spring Assembly F0 2 Green 134 10 3 Torsion Spring Assembly F0 5 Yellow 134 10 Torsion Spring Assembly F1 0 Blue 134 10 4 Torsion Spring Assembly F2 0 Red 134 10 5 Torsion Spring Assembly F3 0 Purple 134 10 6 Torsion Spring Assembly F4 0 White 154 04 Digital Long Stem Thermometer NIST Traceable 8 Stem 58 F 302 F 50 C 150 C 154 24 Thermometer 32 F 86 F 0 C 30 C 130 76 C SP Spare Parts Kit for 130 76 C 130 76 03 Thermoco
18. rates from the Rate Set drop down list To create or edit a rate set click the Calibration Rates button To create a new set click the New Ze ate Sct 2 button and enter a name and the rotational speeds To edit a set select it in the Rate Set list then S change the rotational speeds as necessary S A Delete Calibrating at speeds above 300 RPM can adversely v affect results All speeds in your rate set should be greater than 0 and less than or equal to 300 unless the Low Shear Calibration Mode option is turned on see page 25 Rate Sets Tip 3 Click the Start Calibration button to begin the calibration Once the calibration has started the software will begin filling in the chart and plotting the results on the graph Shear Stress WN Start Calibration Bob ER Temperature r Rien Wating For Ready RS Shear Rate Cal Fluid Batch 0 00 tjs Water Temp Out of Range Error 0 00 Shear Stress raw Fluid Manager 0 000 Rate Set Raw Data ai gt Calibration Rates Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 16 4 As the calibration proceeds the software will begin to display the collected data in the chart At the end of the calib
19. tests 4 Enter aname in the Experiment Name field 5 Click the Start Test button 6 Enter a comment in the resulting dialog box Comments are optional but can be used later to identify the test results Caution The Model 900 Viscometer thermocouple must be immersed in the fluid before enabling the temperature or heating a sample in the Important heat cup Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 24 Software To access the Options screen choose Options from the Edit menu Options 900 Calibration Mode Place the slider on ORCADA Software to enable the calibration screen Place the slider on Onboard to calibrate the unit using the onboard controls Low Shear Stress Calibration Mode Check this box if you intend to calibrate the instrument at low shear rates With this option enabled the software limits the calibration rate set see page 16 to speeds of 100 RPM and below and including 300 RPM Spring Constant Enter the type of spring being used in the unit Scientific Instruments pH Com Port This field specifies which Com port the external pH Meter is connected to Enable pH Check this box if you are using an external pH Meter This will enable the pH and Temp pH fields in the process variable area of the Main Screen It will al
20. 28 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 57
21. 28 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 4 REENEN Shear Rate Constant Dou 7993 0 3770 0 2682 0 2682 0 8503 sec per RPM Shear Rate sec or 1 s Wer Di ess Minimum Viscosity 0 5 lt 600 RPM lt d gt ee ein 10 000 000 89 000 000 255 000 000 500 000 000 23 000 000 lt a gt Computed for standard Torsion Spring F 1 0 For other torsion 160 92springs multiply by F factor lt b gt Lower viscosities can be measured by the Model 900 however one must take into account the effect of bearing drag Taylor vortices zero offset etc when looking at the expected accuracy of the reading lt c gt For practical purposes the minimum viscosity is limited to 0 5 cP due to Taylor Vortices lt d gt Maximum viscosity is based on Maximum Shear Stress and Minimum shear rate RPM However due to practical and physical limitations it may be difficult to take these measurements Viscosity Conversions To convert from units on left side to units on top multiply by factor intercept Centipoise 2 a r Ib s e Se E 0 01 0 01 1 1 0 002088 cP G 478 93 4 189 4 789 478 93 478 93 Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 5 Shear Stress Conversions To convert from units on left side to units on top mult
22. 6 oz 500 mL container Used calibration fluid can contaminate new fluid Before mixing the used with the new inspect the used fluid for contamination Discard Note any fluid that is cloudy or contains suspended solids 11 Remove the rotor Wipe any residual calibration fluid off the rotor and the bob with either a paper towel or a soft cloth Wipe the sample cup dry with a paper towel Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 15 7 7 Before the Model 900 unit can be calibrated using the ORCADA Software Canora uon the Calibration Mode must be set to ORCADA Software Refer to the tn Computer Software Options section on page 25 for more information From the main screen choose Calibrate Shear Stress from the Utilities menu 1 Select a calibration fluid from the Cal Fluid Batch drop down list If the list is empty click the Fluid Manager button to add new fluid batches Refer to page 18 for more information If the Temp Out of Range light shines red the current sample temperature is out of the specified range for the calibration fluid The sample will have to be heated or cooled to be within the acceptable range before calibration A N Do not attempt a calibration if the sample is not within the Important appropriate temperature range 2 Choose a set of calibration
23. Fax 713 880 9886 www ofite com 45 Maintenance 1 Follow steps 1 6 on page 40 Torsion Spring Replacement N Loosen the three screws on the transducer clamp 3 The torsion spring can now be removed from the top of the bob shaft 4 Carefully place the new spring into the top of the bob shaft 5 Tighten the three screws on the transducer clamp to secure the torsion spring inside the top of the bob shaft 6 Reassemble the viscometer Refer to steps 21 26 on page 43 7 Adjust the P value see page 49 for instructions 8 Run the TransCal procedure Steps 10 14 on page 52 9 Recalibrate the viscometer See page 19 Torsion Spring Transducer Clamp Transducer Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 46 Appendix In order to calibrate the thermocouple properly the temperature units on the Thermocouple Calibration 1 2 3 4 viscometer must be set to Celsius If the unit is set to Fahrenheit change it to Celsius before calibrating Press SET UP Press NEXT 6 times The displays should now read Temperature Units Enter 1 Press ENTER then CLEAR STOP to return to the main screen To calibrate the thermocouple compare the temperature reading of the thermocouple to that of a calibrated thermometer at ambient temperature and 100 C Then set the temperature offset an
24. ITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 18 Opera tion When operating in stand alone mode the keypunch panel on the top of the Standalone 1 viscometer is used Following are descriptions of the buttons Individually numbered buttons on left side 0 zero through 9 nine Used to set RPM or 1 s Accurate to two decimal places 0 01 RPM After entering the desired shear rate follow by pressing the ENTER key Numbered buttons on right side 600 300 200 100 60 30 20 10 6 3 2 and 1 These are shear rates typically used in oilfield rheology and provide a quick and convenient means of changing the rotor speeds The RPM speed may be quickly and directly changed by pressing the numbered pads No programming or any other entry is necessary CLEAR STOP Used to end a test sequence or to re enter NEXT Used for sequencing functions SET UP Used to program the machine The unit prompts you to enter a value for each parameter or you can simply press NEXT to accept the defaults Descriptions of the parameters in the order they appear on the display follow below a Temperature Current Set point target temperature for machine to ramp to New New target temperature Press ENTER and then NEXT b Bob 1 is standard New 1 5 Use if another bob B1 B2 B3 etc is used Press ENTER and then NEXT c SS Units
25. a and return to the main screen if 900 Uploaded Test Data 5 23 beta a s x Date Uploaded 06 24 PM Bob j R1B1 12 5 2005 Temp SP Time Cmd Char Gel Time Temp PY 5 5 Gel5 5 300RPMDR 600RPMDR PYDR YP User 5 5 RPM Shear Rate Viscosity l 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Export Upload Save to Disk Uploaded Data Explorer OK Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 38 Disassembly Important Important Maintenance Important This procedure should be performed immediately after every test and calibration 1 Turn the unit off 2 Remove the R1 rotor from the drive rotor 3 Remove the bob a To remove a threaded bob place the bob shaft wrench against the flats on the bob shaft Use the wrench to hold the bob shaft in place while you unscrew the bob Do not try to remove the bob without the wrench Doing so can cause severe internal damage b To remove the KlikLock bob pull it straight down off the shaft 4 Once the bob is removed wipe down the bobshaft 5 For testing mud clean all removed parts with soap and water Ifa stronger cleaner is necessary for removing cement use citric acid Do not use strong acids such as hydrochloric or sulfuric It will damage the equipment The Model 900 utilizes a stepper motor timing chain drive and a non co
26. ame and then click OK Copy this file to the Tests Import Export folder on the destination PC The file must be placed in the correct folder for it to be available for import To find this folder first navigate to the folder specified in the Data Archive Directory field in the Options screen see page 25 for details From there go to the ORCADA folder and then the Tests Import Export folder On the destination PC choose Import from the File menu Choose the tests you wish to import Hold down the CTRL key to select multiple tests The Export field lists all of the files that are available for import Once you have selected one the Tests field shows which individual tests can be imported from that file Below the Export and Tests fields is a display only field that shows the folder being scanned for exported tests Make sure the tests you want to import have been placed in that folder Click the Import button The new tests will appear in the list in the upper left hand corner of the Main Screen Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 34 Software Onboard Program Manager From the Onboard Functions screen you can create custom test programs to be uploaded to the Model 900 unit These programs can then be run from the onboard con
27. attached out of the bearing guide The lower bearing will slide off the shaft as you do this 13 When the bob shaft is completely out of the bearing guide remove the upper bearing 14 Slide a new bearing onto the shaft to replace the upper bearing A The oils from your skin can damage bearings Always wear gloves when handling them Important Torsion Spring Transducer Bearing Bob Shaft 15 Insert the bob shaft back into the bearing guide Push the transducer down onto the bearing guide so that the bearing seats in the available space 16 Place a new bearing onto the bottom of the bob shaft and push it up into the lower portion of the bearing guide 17 Secure the lower bearing in place with a new external retaining ring 18 Screw the upper magnet assembly onto the bottom of the bob shaft for KlikLock units only Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 42 19 Place the bearing guide back into the body and secure it in place with the three standoffs 20 Reattach the transducer sensor board to the bearing guide 21 Carefully place the spring mounting plate onto the three standoffs Secure it in place with the three hex screws Be careful not to bend the torsion spring Important 22 Locate the notch on the transducer body Turn the transducer counterclockwise all the way against the stop A
28. clean and dry stainless steel sample cup 2 Enter the raw file save period in MM SS where MM is the two digit number of minutes and SS is the two digit number of seconds and select the shear stress units from the drop down menu 3 Enter a temperature in the Temp field and choose Celsius or Fahrenheit 4 Select the Enable checkbox next to the Rotation field to start the motor d Once the motor is started the display fields on the right hand Note side of the screen will begin displaying test data 5 Select the Enable checkbox next to the Temp field to start the heater d The Preheat and Cool options are used for pressurized Note viscometers only 6 Enter a name in the Experiment Name field and click the Start Logging button 7 Enter a comment in the resulting dialog box Comments are optional but can be used later to identify the test results Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 23 To begin a test in Auto mode 1 Add approximately 170 mL of test fluid to the clean and dry stainless steel sample cup 2 Enter the raw file save period in MM SS and select the shear stress units from the drop down menu 3 Highlight a test to run from the list in the upper left hand corner of the Main Screen Refer to page 27 for instructions on creating custom
29. d slope on the Model 900 This process only applies to firmware version 1 43 and later 1 2 Press SET UP Press 600 3 times Press NEXT 11 times The display should now read TC Offset Enter 0 and press ENTER Press NEXT The display should now read TC Slope Enter 1 Press ENTER then CLEAR STOP to return to the main screen With the thermocouple and calibrated thermometer in air record the temperature reading from the Model 900 display This value will be M1 Record the temperature on the calibrated thermometer as A1 Place the thermocouple and calibrated thermometer into a heat source at 100 C Record the reading from the Model 900 display as M2 and the calibrated thermometer as A2 Calculate the slope and offset using the following equations Slope A2 A1 M2 M1 Offset A1 Slope M1 Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 47 11 Repeat steps 1 through 3 above to return to the TC Offset screen Enter the Offset value from step 10 and press ENTER If the Offset value is negative include a at the end For example if the Offset is calculated as 2 2 enter 2 2 on the Note Model 900 12 Press NEXT to go to the TC Slope screen Enter the Slope value from step 10 13 Press ENTER then CLEAR STOP to return to the main screen 14 The Model
30. djust the position of the notch on the transducer so that it rests on the far right edge of the black mark on the transducer sensor board 23 Tighten the set screw on the zero calibration knob This will lock the spring in place 24 Test the transducer to make sure it turns freely and returns to the designated resting place 25 Place the housing cover back onto the unit and secure it in place with the five screws 26 Adjust the P value see page 49 for instructions Then recalibrate the viscometer see page 14 Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 43 Maintenance Main Shaft Bearing Replacement Remove the bearing guide Follow steps 1 7 on page 40 Loosen the motor with the appropriate Allen wrench The four screws are located around the base of the motor Gently slide the motor forward to loosen the chain freeing it from the sprocket With a small flat nead screwdriver remove the split ring from on top of the main shaft bearing Without the split ring the main shaft assembly will fall out of the main housing body Be sure to hold the main shaft assembly when you remove the split ring so that it doesn t drop Slide the main shaft assembly down out of the main housing body The upper bearing will stay inside the housing but it can be easily removed and replaced by lifting it up out of its
31. dont accept this agreement lt Back Cancel Completing the Device Driver Installation Wizard The drivers were successfully installed on this computer You can now connect your device to this computer f your device came with instructions please read them first Driver Name Status wi FTDI CDM Driver Packa Ready to use wi FTDI CDM Driver Packa Ready to use computer The computer will continue installing the software Wait for it to finish installing Note 8 Once the installation is complete navigate to the Device Manager Click the Start Menu Open the Control Panel Click the Hardware and Sound link Click on the Device Manager link in the Devices and Printers options Patent No 6 776 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 54 9 Confirm which communication port COM Port the USB Serial Port is located in The window below is indicating that this sample port was connected to COM3 which can be a different COM depending on the computer and the port it was connected to This is the COM Port that the driver has been assigned to gay Device Manager File Action View Help ee lsai El RHel is e a n OF 3 Batteries cb Computer x Disk drives amp Display adapters ve DVD CD ROM drives BR Floppy drive controllers oS Human Interface Devices
32. e type can a potentially harm your computer Only run software from publishers you trust What s the risk 3 The FTDI CDM Driver will open to allow you to extract the driver and launch the installer Click Extract FTDI CDM Drivers Click Extract to unpack version 2 12 00 of FTDI s Windows driver package and launch the installer www ftdichip com 4 A welcome window will open Click Next Welcome to the Device Driver Installation Wizard This wizard helps you install the software drivers that some computers devices need in order to work To continue click Next Patent No 6 776 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 53 5 Accept the licence agreement and click Next To continue accept the following license agreement To read the entire agreement use the scroll bar or press the Page Down key IMPORTANT NOTICE PLEASE READ CAREFULLY BEFORE INSTALLING THE RELEVANT SOFTWARE This licence agreement Licence is a legal agreement between you Licensee or you and Future Technology Devices Intemational Limited of 2 Seaward Place Centurion Business Park Glasgow G41 1HH Scotland UK Company Number SC136640 Licensor or we for use of driver software provided by the Licensor Software BY INSTALLING OR USING THIS SOFTWARE YOU AGREE TO THE l Save As Print C
33. eadable output of the sample characteristics in accordance with determined calculations based upon the shear rate and the bob displacement Revolutionary improvements in stepper motor technology by OFITE enables the Model 900 Viscometer to operate accurately at extremely low shear rates 0 01 1 s As a stand alone field unit the press of a single button MUD or CEM prompts the viscometer to perform standard API recommended practices for the technician s choice of Mud Plastic Viscosity PV Yield Point YP or Cement rheologies Standard speeds 600 300 200 etc are provided as single button operations on the keypad or if another shear rate is desired the parameters may be entered on the numbered keypad Simply press ENTER after entering the desired shear rate and the viscometer performs the rest of the work It is not necessary to stop the motor between speed changes For a fully automated Control Data Acquisition System suitable for research applications the Model 900 Viscometer may be connected to a computer via a serial RS 232 port using OFITE s exclusive and field proven Windows based ORCADA software U S Patent Number 8 763 776 Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 2 Components 130 76 03 Thermocouple 130 76 04 Main Bearing 130 76 05 Retaining Ring 130 76 08 Bob Shaft
34. el time Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 28 Stir Prior to Gel Check this box to stir the sample before calculating gel strength Gel Stir Rate This is the rate the sample will be stirred prior to calculating gel strength Gel Stir Time This is the time interval the sample will be stirred Plot All Records If this box is checked all records will be plotted on the graph If it is not checked only the currently highlighted record will be plotted The graph below the records provides a visual representation of the current test Each line represents one aspect of the test RPM Setpoint Temperature Setpoint and Temperature PV Refer to the key to the right of the graph for details The graph features a cursor a vertical yellow line that can be used to view more detailed information about the different phases of the test The Center Cursor button moves the cursor to the center of the graph Click and drag the cursor across the graph to see more detailed information Refer to the Test Detail field below the graph for more information Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 29 Software After building a test in the Test Builder the chart at the bottom
35. elta Time the time interval between sweeps h Gel Time 1 During a gel time interval the rotor comes to a complete stop and waits At the end of the interval the rotational speed is increased to 3 RPM until the gel breaks and a gel strength value is recorded Click the Insert Gel Column button to add a gel time to the record I RPM 1 2 3 etc The RPM fields set the speed of each step of the sweep 5 Repeat step 4 in the following record fields until you have completed building your test 6 Click the OK button to save the test and return to the main screen Hold for Temp Click this checkbox to tell the unit to wait until the sample has reached the temperature setpoint before proceeding to the next step If this box is unchecked the test will proceed while the sample is heating Temp Threshold This field specifies an acceptable variance on the temperature For example if the temperature setpoint is 150 and the Temp Threshold is set to 5 the unit will consider the setpoint reached when the temperature is between 145 and 155 Temp Unit set temperature units to either F or C Rate Unit set the rate units to either RPM or 1 s Pressure Unit The field is not used on the Model 900 Hysteresis If this box is checked each sweep will be performed forward and backwards Stir Parameters These parameters only apply if the test includes a g
36. er stop Then let go of the bob and let it return to its resting position 9 Type N and press Enter The software will show details of the calibration Close Hyperterminal EE File Edit View Call Transfer Help Die 3 vie Current Status Encoder Type Non fAbsolute Step 1 Enter to abort or N to go to next step Aborted Calibration Complete gt Encoder calibration Step 1 Rotate the encoder shaft slowly through at least 360 degrees Press Enter to abort or N to go to next step Fine Sine Offset 7 17 mY mY oo mY i 381 30 mY Amp Error 1 25 mY 8 33 Calibration Complete gt Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 51 10 Attach the rotor sleeve to the rotor Fill the thermocup with calibration fluid and raise it to submerge the bob d For an F1B1 configuration use 200 cP fluid For an F2B2 configuration use 1000 cP fluid Note 11 Open the TransCal software supplied by OFITE 12 On the Manage Devices screen right click the Viscometer in the list and select Default Device Then click Done kl If the Viscometer does not appear in the list select the correct COM port Tip from the list and click the Search for Devices box ES Manage Devices 1 00 beta Machine Name Network Name A Version Info Errors
37. ess steel arm until the fluid level reaches the scribed line on the rotor Tighten the lock nut on the platform Recommended Viscosities for Calibration at 300 RPM for various Torsion Springs R1 B1 Torsion Spring F0 2 60 cP Torsion Spring F0 5 150 cP Torsion Spring F1 0 300 cP Torsion Spring F2 0 600 cP Torsion Spring F3 0 900 cP Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 14 4 Allow acouple of minutes for the temperature of the calibration fluid to equalize 5 Find the calibration sheet attached to the calibration fluid you are using Record the viscosity at the temperature being read on the unit 6 Enter the actual viscosity listed on the calibration sheet of the calibration fluid must be lt 300 cP if the standard B1 Bob R1 Rotor and F1 Torsion Spring are used using the left side of the keypad Press ENTER 7 The machine will perform the calibration internally in a series of sweeps and return to the main screen 8 Turn the unit OFF 9 Loosen the lock nut on the platform while holding the bottom of the platform with your other hand Slowly lower the platform with the sample cup and calibration fluid Allow the stainless steel cup to remain beneath the bob and rotor to allow residual calibration fluid to drain 10 Pour the calibration fluid from the sample cup back into the 1
38. fset Refer to the Thermocouple Calibration section on page 47 6 CAL Provides a quick and easy method of internally calibrating the viscometer Refer to the Calibration Standalone section on page 14 for more details 7 MUD By pressing this button once the viscometer will automatically measure calculate and display Plastic Viscosity PV in cP and Yield Point YP in the shear stress unit specified in SET UP see page 19 as per API recommended practice 13B1 13B2 and 13D This enables the technician to simultaneously perform other tasks and it assures increased accuracy and reproducibility as each test is conducted in the Same manner and for the same time periods Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 20 a Press MUD The following steps will be performed At each interval the viscometer stabilizes and then records a reading If you prefer not to wait for the 10 minute Gel test you may hit NEXT to cancel that particular operation while still obtaining readings on everything else that was measured Mixing Speed 600 RPM for 15 seconds 300 RPM for 10 seconds 10 second Gel Wait 10 seconds Mix for 10 seconds 10 minute Gel Wait 10 minutes OO Om P Go hi Go Te N To NS NS b After the completion of the test the following is displayed py Ss yp
39. gher than the sample temperature the heaters will engage to heat the sample PreHeat This field is not used on the Model 900 Cool This field is not used on the Model 900 Clear This button removes all data from the graph Analysis Model This field below the graph displays the current Analysis Model being used in the test This variable is set in the Test Builder refer to page 27 for more information Analysis Data This chart shows the calculated values based on the Analysis Model being used for the test This data will not display until after the analysis sweep is completed Temperature Shear Stress Viscosity Shear Rate RPM These fields display the current value for these variables They are display only The drop down box next to the Shear Stress field changes the units of the Shear Stress variable The units can be set to Dyne cm b 100ft Pa Dial Reading lb ft Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 13 Calibration Standalone Note Note The calibration procedure is easily performed by pressing the CAL button and following the instructions as you are prompted on the unit s display screen Calibrations should be routinely performed prior to rheological testing and are necessary after changing out bearings or the torsio
40. ine green while logging is in progress Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 11 Cond Pause This button will pause a test during the conditioning phase and put the software into Manual Mode While the test is paused the motor and heat controls can be controlled in the same manner as in a standard Manual Mode test To resume the test click the Cond Pause button again You will be asked if you want to Continue the test with the remaining conditioning time or if you want to Override the remaining time and extend the effective conditioning time If you choose to Continue the time remaining in the conditioning cycle will appear as though the test was never paused If you choose to Override the time remaining in the conditioning cycle will resume at the point where the test was paused For example assume a test has a conditioning time of 10 minutes and the test is paused at the 5 minute mark for 1 minute If the test is unpaused using the Continue option the time remaining in the conditioning cycle will be 4 minutes However if the test is unpaused using the Override option the time remaining in the conditioning cycle will be five minutes making the effective total conditioning time 11 minutes Raw File Save Period This field determines how often data is recorded
41. into the Program Steps box lt lt This button copies the steps from the Program Steps box into the selected onboard program The selected program will be overwritten and the new program will be copied to the Model 900 unit Delete This button deletes the selected onboard program Archive Actions gt gt This button copies the steps of the selected archived program into the Program Steps box lt lt This button copies the steps from the Program Steps box into the selected archived program The selected program will be overwritten Delete This button deletes the selected archive program Program Actions Delete Row deletes the selected row in the Program Steps box Insert Row inserts a new row above and identical to the selected row Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 36 Softwa re 1 To transfer the results of the last test from the Model 900 unit to the PC Upload Test Data click Utilities then 900 Onboard Functions then Upload Test Data 2 Click the Upload button to initiate the transfer and display the data on the screen Each line shows one step of the test a b O Temp SP temperature setpoint Time elapsed time in minutes for the step Cmd Char command character Gel Time
42. iply by factor intercept Dyneim Pa anon pp DR Pa 10 1 f 2084 0 02084 1 957 DR Lag 0 5107 1 065 j 0 01065 1 What Bob amp Spring Should I Use There is often confusion or misunderstanding about what a viscometer can actually measure For example a viscometer with an R1B1 F1 combination can measure water fairly well at 100 RPM and higher but at 3 RPM the readings would be shaky at best While on the other hand a linear fluid with a viscosity of 15000 could not get past 6 RPM with the same combination To estimate which spring might be best use the formula below to calculate a Minimum Spring factor where one establishes the maximum RPM the fluid is going to be tested at as well as what the expected Apparent Viscosity of the fluid at that RPM If the Factor comes out as 87 then an F 1 0 spring should be used If it comes out as 16 then an F 0 2 spring would be best To cover all ranges it may be necessary to use more than one spring Always run the TransCal procedure steps 10 14 on page 51 after changing the bob or spring ini i RPM max AV max Minimum Spring Factor F see ge ae Bob F RIB 89 Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 6 Safety In order to comply with the requirements of safety standard EN 61010 the viscometer has a separable cord a
43. is Model Stir Parame ters RP 39 2 gea T Stir Prior to Gel Gel Stir Rate I Hold for Temp I Hystoresis o Temp Threshold Temp Unit Rate Unit Pressure Unit Gel Stir Time doo Wa o Wa 2 dr d 1 J psi 00 00 00 aj RP 108 Template RP 13D Template RP 39 Template New Test Copy Test Delete Record K Insert Gel Column it Heat ijs Temp Zond Time Cond iis Swps Delta Time 0 150 00 20 00 100 8 00 15 00 e D 150 00 25 30 100 4 00 30 00 ei k en en 5 jee ji sta 100 75 50 25 25 50 75 10C 100 75 50 25 25 50 75 10C Orr 1 1 1 1 1 DH 1 H 1 1 1 1 U 1 1 1 1 00 00 00 00 15 00 00 30 00 00 45 00 01 00 00 01 15 00 01 30 00 01 45 00 02 00 00 02 15 00 02 30 00 02 45 00 03 00 00 03 15 00 03 30 00 03 45 00 04 11 Time Time 8 3 wal Bs ml I Plot all Records RPMSP B n Cursor Time Amplitude aly i p Beu 00 00 32 Center Cursor E He Drees Test Detail Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 27 d Cond Time the time period to condition the sample e Cond RPM the rotational speed during conditioning f Swps the number of sweeps to perform after conditioning A sweep is a set of rotational speeds separated by time interval Between sweeps the rotor returns to the Cond RPM At the end of each sweep the unit calculates the Analysis Model values g D
44. ld 132 57 onto the bob shaft with the flat portion facing up Locate the wrench flats on the bob shaft Place the bob shaft wrench 130 76 08 against these flats to hold the shaft in place Tighten the bob by turning it clockwise when viewed from above Always use the bob shaft wrench when installing or removing the bob Do not tighten the bob against the stop pin Important If the bob or spring is being changed run the TransCal procedure steps 10 14 on page 51 Bob Shaft Wrench Bearing Shield 130 76 08 132 57 2 Some viscometers are equipped with a magnetic KlikLock bob To install this bob slide it up into the rotor and turn it just until it clicks into place 3 Connect the instrument to a power source This viscometer will operate equally well at 115 Volts or 230 Volts 50 or 60 Hz Always plug the Model 900 into a surge suppressor instead of uN directly into an electrical outlet The internal electrical components Important can be damaged by voltage spikes 4 Tocontrol the temperature plug the thermocouple into the left side of the housing cover and place the thermocouple into the thermocouple well of the heat cup Also plug the power cord of the heat cup into the back of the Model 900 Turn the knob on the heat cup all the way to maximum to allow the viscometer to control the temperature Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832
45. n ninety 90 days of invoice are subject to a 15 restocking fee Items returned must be received by OFITE in original condition for it to be accepted Reagents and special order items will not be accepted for return or refund OFITE employs experienced personnel to service and repair equipment manufactured by us as well as other companies To help expedite the repair process please include a repair form with all equipment sent to OFITE for repair Be sure to include your name company name phone number email address detailed description of work to be done purchase order number and a shipping address for returning the equipment All repairs performed as repair as needed are subject to the ninety 90 day limited warranty All Certified Repairs are subject to the twelve 12 month limited warranty Returns and potential warranty repairs require a Return Material Authorization RMA number An RMA form is available from your sales or service representative Please ship all equipment with the RMA number for returns or warranty repairs to the following address OFI Testing Equipment Inc Attn Repair Department 11302 Steeplecrest Dr Houston TX 77065 USA OFITE also offers competitive service contracts for repairing and or maintaining your lab equipment including equipment from other manufacturers For more information about our technical support and repair services please contact techservice ofite com Patent No 6 766 0
46. n place with the hex screws Be careful not to bend the spring Refer to page 40 for photos Loosen the two set screws that hold the Zero Calibration Knob onto the Spring Mounting Plate Tighten the set screw that holds the spring in the Zero Calibration Knob Slowly rotate the Zero Calibration Knob until the P value is approximately 20 500 Tighten the set screw in the Zero Calibration Knob Reassemble the Model 900 Turn the unit off and then on to make sure the P value does not drift Calibrate the viscometer with fluid Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 49 Appendix Transducer Linearization The transducer linearization process is only necessary if the transducer transducer board or control board have been replaced This process only applies to firmware version 1 43 and later 1 Make sure the computer is connected to the Model 900 viscometer and that the ORCADA software is not open Lower the thermocup and remove the rotor sleeve so that the bob is exposed Open Hyperterminal In the New Connection dialog box give the connection a name This name is unimportant However it is necessary to enter something in the Name field Connection Description i x bai Ge S CR Mew Connection Enter a name and choose an icon for the connection Hame Set the following port
47. n spring According to AP Recommended Practice 10B 2 viscometers being used for testing well cement should be calibrated quarterly API Recommended Practice 13B 1 and 13B 2 specify viscometers being used for drilling fluids should be checked monthly For the most accurate calibration results calibrate the thermocouple before performing the following procedure Refer to page 4 7 for instructions If you use a computer with the Model 900 you must unplug the connection before beginning the procedure 1 Press the CAL button The viscometer will display the Zero Offset This shows how much the bob has drifted since the last calibration If this value is greater than 1 make sure the bob is properly installed on the unit and that it spins freely Then rotate the bob by hand and let it go If the Zero Offset is still greater than 1 continue with the calibration This will reset the Zero Offset If after calibration the Zero Offset is still greater than 1 contact OFITE Technical Support for additional help After verifying the offset confirm that the P value is within the specified range lf it is not follow the instructions on page 49 to adjust it 2 When prompted enter the viscosity of the calibration fluid 3 Add approximately 170 mL calibration fluid into the clean and dry stainless steel sample cup Place the sample cup with calibration fluid onto the platform Loosen the lock nut on the platform with the stainl
48. nd Fault Interrupt Circuit GFIC Repair or replace a damaged or worn cord immediately When in doubt consult a qualified electrician Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 56 Warranty and Return Policy Warranty OFI Testing Equipment Inc OFITE warrants that the products shall be free from liens and defects in title and shall conform in all respects to the terms of the sales order and the specifications applicable to the products All products shall be furnished subject to OFITE s standard manufacturing variations and practices Unless the warranty period is otherwise extended in writing the following warranty shall apply if at any time prior to twelve 12 months from the date of invoice the products or any part thereof do not conform to these warranties or to the specifications applicable thereto and OFITE is so notified in writing upon discovery OFITE shall promptly repair or replace the defective products Notwithstanding the foregoing OFITE s warranty obligations shall not extend to any use by the buyer of the products in conditions more severe than OFITE s recommendations nor to any defects which were visually observable by the buyer but which are not promptly brought to OFITE s attention In the event that the buyer has purchased installation and commissioning services on applicable products
49. nd plug without a locking device to mate with a socket outlet in the building If the user substitutes another cord the cord should not exceed 3 meters 9 10 in length Any interruption of the protective earth conductor inside or outside the instrument or disconnection of the protective earth terminal is likely to make the instrument dangerous under some fault conditions Intentional interruption is prohibited If the equipment is used in a manner not specified by the manufacturer the protection provided by the equipment might be impaired Whenever it is likely that protection has been impaired the instrument should be made inoperative and secured against accidental operation OFITE Technical Service should be contacted for advice Any service performed by removing the viscometer cover should only be performed by a knowledgeable operator There are no user serviceable components inside the heat cup cover The Heat Cup should only be serviced by a factory authorized technician Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com Setup The Model 900 Viscometer is a precision instrument Any damage to the bob shaft bearings or transducer will greatly affect the accuracy of the readings Always handle the Viscometer with care especially when installing and removing the bob 1 To install the bob first slide the bearing shie
50. ntact rotational transducer detection system which is extremely accurate and sensitive enough to detect micro divisions of 1 262 000th of a revolution This viscometer utilizes an absolute minimum of moving parts and there are no gears to jam up or get worn down like more conventional units The bob shaft bearings are isolated from the rotation of the rotor which ensures no induced drag on the bob shaft due to rotation This results in more sensitive and accurate readings particularly at low shear rates and the life of the bearings is prolonged When replacement is warranted however the bearings and the torsion spring may be easily changed This is a major advantage over previous viscometers It is important to remove the bob from the bob shaft during viscometer transport to prevent bending or damaging the bob shaft assembly Tools Required Allen Wrench Ye Allen Wrench a Split Ring Pliers small Bob Shaft Wrench provided Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 39 Maintenance 1 Unplug all electrical wires and the thermocouple wire from the housing Bob Shaft Bearing 2 Remove the bob and rotor Replacement 3 Remove the five screws along the base of the outer housing cover and gently lift off the cover AN Warning Risk of electrical shock 4 Loosen the set screw on the zero calibration knob
51. nutes After the completion of the test results are displayed as follows Clicking NEXT allows you to proceed to the next set of readings 1 Up Readings for all the test speeds 2 Down Readings for all the test speeds 3 Avg Readings for all the test speeds 4 Gels amp Temp 1 10 Sec 2 10 Min 3 Temp 9 In addition to the pre installed programs MUD and CEM the OFITE Model 900 contains 8 slots for custom programs created with the ORCADA Software Refer to page 35 for instructions on creating custom programs To access these custom programs a Press the SET UP key twice At this point you can press the ENTER key to recall the results of the last test run Press the SET UP key again to select a new test to run Select a test by pressing the numeric key corresponding to the test you wish to run The test will start immediately When the test is complete the unit will beep Press the NEXT key to page through the test results Press the CLEAR STOP key to return to the main menu Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 22 Opera tio n The ORCADA software has two modes for running tests Auto and Manual By default the software is in Manual mode when first opened With Computer To begin a test in Manual mode 1 Add approximately 170 mL of test fluid to the
52. of the Main Screen will show the various data points being calculated by the viscometer select Analysis based on the chosen Analysis Model This chart however is customizable Outputs You can choose which data points are displayed on the chart and which are not From the Edit menu choose Select Analysis Outputs By default all data points are selected and will appear on the chart To remove a data point from the chart simply uncheck the box next to it e RP 108 RP 13D od Se Ge i a mg cd e M aveet ees 29Ek Eeer i feerm e P r2 g 17 E F Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 30 Software Saved Test Data To review test data from past tests Select Saved Test Data from the File menu ech 2 The saved test data is grouped by month Select the folder for the year and month of the data you are looking for and click the small sign next to it This will show you all of the data for tests run that month including any comments you added 3 Select the test you are looking for and click the OK button Multiple tests can be selected by holding down the CTRL key and selecting each test omment E2005 Monthi 1 EHE 2005 Monthi2 of FE 208 OT 18 37 23 jel ocation 208 Test 1 18 37 23 18 37 28 jel ocation 208
53. osity the ideal viscosity of the sample as calculated by the software Ref Shear Stress the ideal shear stress as calculated by the software Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 17 Calibra tion Before calibrating the unit you must input the specifications of the calibration Fluid M fluid that you are using This will give the software the information it needs to S nema perform the calibration accurately Click the Fluid Manager button on the Calibration screen to add a new calibration fluid batch 1 Click New to add a new batch You can also edit an existing batch by selecting it in the Batch Selector list 2 Inthe Batch field type a name for the batch OFITE recommends using the lot number and viscosity from the Certification Chart that was provided with the fluid 3 Inthe Calibration Fluid Table enter at least two Temperature Viscosity pairs from the Certification Chart Only two pairs are required The Table Linearity Error light will shine red if the values in the Calibration Fluid Table do not create a straight line If this occurs check the values and re enter them 4 Once you have entered all the batches click OK to close the Fluid Manager and return to the Calibration screen Patent No 6 766 028 OFI Testing Equipment Inc OF
54. program Do you want to keep blocking this program Name ORCADA S Sieg Publisher OFITE Keep Blocking Unblock Ask Me Later Windows Firewall has blocked this program from accepting connections from the Internet or a network IF you recognize the program or trust the publisher you can unblock it When should unblock 4 program Windows XP Firewall Alert Communication Available Tests Log Indicator Status Indicator _ P DRCADA 5 66 beta Model 900 E Edit Utilities About ja Start Test Est Not Running 00 00 00 Test Elapsed Time q i Cement 00 00 00 State Elapsed Time 7 Mud 00 00 00 State Total Time Progress Raw File Save Period Experiment Name Bob S Start Logging _Cond Pause 01 00 mmiss SREI Ek Key Any H H 1 1 i 1 ml 00 01 54 00 01 45 00 01 30 00 01 15 00 01 00 00 00 45 00 00 30 00 00 15 00 00 01 Relative Time Rotation Y lt EE Clear Analysis Model Es Si D T Enable EE ee i M e Test State n Ky K KF mi r rZ Fator 1 Facto zl Shear Stress 00 00 00 lt Record 1 gt lt Sweep 1 gt 0 0000 0 00000 0 00000 0 0000 0 0000 0 0000 0 0000 0 0000 oC 0 0 Dynefcm 2 x e E E E E AS HE 3 SE Si SE T IT Enable mar I PreHeat Cool Manual Mode Analysis Data Process Variables Controls Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300
55. ration the software will calculate the r 2 value which measures the accuracy of the calibration If this value is less than 0 9990 recalibrate the unit If this value is still low change the lower bearing see page 40 for instructions and try the calibration again If the unit still does not calibrate it will require servicing by an OFITE technician S S Reference the ideal shear stress as calculated by the software S S Raw the actual signal coming from the unit RPM rotational speed Viscosity Reference the ideal viscosity of the sample as calculated by the software Temp the temperature of the sample at the time viscosity was measured S S Best Fit shear stress value demonstrated by the viscometer Viscosity Best Fit viscosity value demonstrated by the viscometer S S Fit Error deviation of actual shear stress from S S Best Fit r42 This is a measure of the accuracy of the calibration It will be calculated at the end of the calibration cycle If this value does not read greater than 0 9990 after multiple calibration tests the unit will require servicing or new bearings r42C This value is not used on the Model 900 and should be ignored Temperature the temperature of the sample Shear Rate rotational speed 1 s RPM rotational soeed RPM Shear Stress Raw the actual signal coming from the unit Ref Visc
56. recess Main Shaft Main Shaft Bearing Upper Main Housing Chain Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 44 6 To replace the lower main shaft bearing loosen the two set screws on the side of the sprocket The sprocket and the bearing may then be removed from the main shaft 7 Replace the lower bearing and sprocket tighten the set screws and replace the assembly inside the main housing Make sure the belt fits around the teeth in the sprocket 8 Replace the split ring on top of the main shaft bearing It is easier to replace the split ring if upward pressure is applied to the main shaft assembly from below 9 Again make sure the belt fits around the sprocket teeth and then push the motor toward the back of the viscometer This will tighten the belt Turn the main shaft by hand to make sure the belt and main shaft assembly are turning freely Tighten the screws on the motor 10 Reassemble the viscometer Refer to steps 19 26 on page 43 11 Adjust the P value see page 49 for instructions Then recalibrate the viscometer see page 14 Split Ring Groove Gear 130 76 23 Lower Main Bearing 130 76 04 Rotor Tube 130 76 22 Split Ring 130 76 05 Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300
57. settings Bits per second 38400 Data bits 8 Parity None Stop bits 1 Flow control None Port Settings Bits per second aam sl Data bits P sl BS E Stop bits fi Flow control Restore Defaults Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 50 4 Click OK to connect to the viscometer 5 Press the Enter key twice to bring up the prompt 6 Type M1 and press Enter The characters you type will not appear on the screen Note BER File Edit View Call Transfer Help D a a3 Set SSR duty cycle H 299 0 100 Set motor control j 0 1 1 SE ei 0 1 0 forward 1 0 1 1 enforce travel limits 0 1 1 Dual Motor mode e Ver Ee E EE T degrees C o 0 to 90 0 OFF 1 ON Loopback data command Returns LI I m reply Display er eg Set bob 1 5 Set prog global data for prog K name Y steps Z Read prog global data for prog X 0 14 prog line KX 0 49 prog global data for saved results MN 0 29 saved results line d for prog specified by last ISGx prog line X Temp Time RPM Command Gel Time Current Status Encoder Type Non fAbsolute None 7 Type C and press Enter 8 Ignore the instructions on the screen Slowly turn the bob until it hits one of the stops Then slowly turn it in the other direction until it hits the oth
58. so make pH an option on the key to the graph RPM DAQ Settings RPM High RPM Med and RPM Low Dead Time DAQ Time These fields are used to determine the amount of time needed for the sample to stabilize at a given rate The fields are also used to determine the amount of time data is averaged before being saved For example if RPM High is set to 60 Dead Time is set to 15 and DAQ Time is set to 20 any rate of 60 RPM or greater during a sweep would stabilize for 15 seconds then begin averaging data for 20 seconds before saving the data Com Port This field specifies which Com port the viscometer is connected to See page 55 for more information DAQmx Device Name If multiple DAQ cards are installed on the PC choose the card you wish the unit to use Reverse Rates Gel UI If Hysteresis is selected on the Test Builder screen see page 27 this option will perform a gel test after both the forward and backward portions of the sweep Data Archive Directory This field specifies the directory to store archived data Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 25 Software Save Rate Settings By default the ORCADA Software saves data to file based on a set time interval This time interval can be changed by editing the Raw File Save Period
59. t Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 26 Software The Test Builder is designed to help you build custom tests for use in Auto Test Build mode To access the test builder go to the Main Screen and choose Test Beane Builder from the Edit menu 1 To create a new test click the New Test button To create a new test based on one of the RP 10B RP 13D or RP 39 analysis models click the appropriate button at the top of the screen to open a template To edit an existing test select the test from the list in the upper left hand corner of the screen 2 Enter a name in the Test Name field 3 Choose an Analysis Model a RP 39 Power Law Model records the Power Law calculations n and k b RP 13D Bingham Plastic Analysis Models records plastic viscosity PV and yield point YP c RP 10B Power Law and Bingham Plastic Models combined 4 Input the values for your test into the fields in Record 1 a Heat Time the time it will take the unit to heat the sample to the temperature setpoint If this field is left blank the unit will heat the sample as fast as possible b Heat RPM the rotational speed during the heating period c Temp the temperature setpoint Enter any letter in this field to indicate Ambient Available Tests Records Keser Auto Test Setup Test Name Analys
60. th mm ss 5 When you have finished entering all of the test steps select a slot on the Onboard Programs box and click the lt lt button This will copy the steps from the Program Steps box to the Model 900 unit Each slot in the Onboard Programs box corresponds to a program number on the Model 900 The first slot will be 1 on the unit the second slot will be 2 etc If the slot you choose is already storing a program that program will be overwritten by the new one Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 35 Pi Onboard Program Manager 5 50 beta i x Onboard Programs Test 1 Program Name Steps Program Steps a Onboard Actions Temperature Time RPM Cmd Char Gel Time Al 50 10 00 250 0 a 00 00 60 05 00 300 0 m 00 10 80 05 00 450 0 m 00 10 100 05 00 600 0 m 00 10 dag Delete 0 0 0 0 90 0 0 Program Actions Delete Row Insert Row ii Archived Programs ProgramName Steps Archive Actions gt gt lt lt Delete ad E Lal GR ok 6 Programs can be archived to disk for backup and easy access The Archived Programs box displays all archived programs These programs are accessed and modified the same as the onboard programs Onboard Actions gt gt This button copies the steps of the selected onboard program
61. trol panel without requiring the ORCADA software 1 Begin on the Main Screen On the Utilities menu choose 900 Onboard Functions then Onboard Program Builder When the screen opens the unit will transfer the programs stored in the units memory to the PC These will be displayed in the Onboard Programs list in the upper left hand corner of the screen If you are editing an existing onboard program select the program name from the Onboard Programs box and click the gt gt button This will copy the steps of the selected program into the Program Steps box where they can be edited At the bottom of the screen select the desired temperature units F C Enter the required information in the Program Steps box To insert or delete a row click the corresponding Program Actions button a Temperature temperature setpoint b Time time to heat the sample mm ss c RPM rotational speed d CMD Char i a This option calculates the average shear stress over the conditioning period li m This option performs a mudsweep when both the Temperature and Time conditions are met During the mudsweep the rotor is turn at 300 RPM for 15 seconds then 600 RPM for 15 seconds then the software calculates plastic viscosity PV and yield point YP e Gel Time time to let the sample stand before calculating gel streng
62. uple 130 76 04 Main Bearing Qty 2 130 76 05 Retaining Ring Qty 2 132 80 Calibration Fluid 100 cP 16 oz 132 81 Calibration Fluid 50 cP 16 oz 134 05 2 Bob Shaft Bearing Qty 8 135 02 External Retainer Ring Qty 2 Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com Specifica tions Instrument Geometry True Couette Coaxial Cylinder Motor Technology Stepper 12 Fixed Speeds 600 300 200 100 60 30 20 Meter speeds RPM 10 6 3 2 and 1 Variable speed range 006 1000 Speed Accuracy RPM Shear Rate Range sec 01 1 700 Digital Heat Cu Stainless Steel 150 Watts Maximum i Recommended Temp 190 F 88 C Weight kg BS Dimensions em DB 9 Serial Port Windows 2000 or newer Recommended screen resolution 1024 x 768 pixels Sek Jeer R62 RIBS emer RIBS 1 8416 12276 Computer Requirements 0 117 0 6139 5 5 5 1 Shear Rate Constant k sec 4 7993 0 377 0 2682 0 2682 0 8503 per RPM Shear Stress Constant for Effective Bob Surface k cm 0 01323 0 02610 0 05290 0 10600 0 01541 Overall Instrument Constant K with Standard F1 0 Spring 300 2 672 7 620 15 200 349 n Kf N SS SS Dyne cm kK 330 651 3 359 977 6 717 F 2 0 R 13 435 26 870 840_ 16 571 33 587 3 860 16 800 33 143 67 175 134 603 19 548 Patent No 6 766 0
63. uston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com Introduction Description The Model 900 Viscometer is a portable yet fully automated system for measuring fluid viscosity It is designed to be easy to use easy to maintain and to provide consistent results Its simplicity makes it ideally suited for field applications Engineers will appreciate the push button calibration its reliability and the ability to perform standard American Petroleum Institute API recommended practices with one command With the addition of a computer it is able to perform a variety of more complex laboratory tests Routine repairs like bearing and torsion spring replacement may be performed by field personnel with a minimum of training without having to return the viscometer for repair The optional KlikLock bob uses a magnetic coupling to make removal quick and easy The OFITE Model 900 Viscometer is a true Couette coaxial cylinder rotational viscometer which employs a transducer to measure the induced angle of rotation of the bob by a fluid sample The test fluid is contained in the annular space or shear gap between the rotor and the bob which is attached to a shaft with a biasing spring The viscous drag exerted by the fluid creates a torque on the bob and is monitored by the transducer that measures the angular displacement of the bob Using the angle of displacement of the bob the processor calculates and transmits r
64. xcel for further analysis Print Click this button to print the results to the default printer Experiment Explorer Click this button to choose another set of test data to review OK Click this button to return to the main screen Analysed Data Raw Data Analysed Data Test Setup Auto Test Setup Test Name Analysis Model None J Hold for Temp J Hystoresis Temp Threshold Temp Unit Rate Unit Pressure Unit Temp 7 Cond Time Cond RPM Swps Delta Time RPM1 7 Time Length a 15 11 24 2 Patent No 6 766 028 OFI Testing Equipment Inc OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 32 Software Calibration History On the Calibration History Screen you can retrieve the data from all past calibration tests Begin on the Main Screen Select Calibration History from the Utilities menu The calibration tests are grouped by month Select the folder for the year and month of the calibration test you are looking for and click the small sign next to it This will show you all of the calibration tests run that month including the fluid batch and any comments you added after the

130-76 - Model 900 Viscometer - User Manual

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