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OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ofite.com

9

Software

Calibration

To determine if a cell needs to be calibrated, zero the transducer (see page 

8) and then place the calibration block underneath the LVDT rod. If the 

corrected distance does not correspond to the marking on the calibration 

block, the cell should be calibrated.

1.  Place an empty sample cup upside down on the stirring hot plate. Make 

sure the rod of the LVDT is resting on the bottom of the cup.

2.  In the Swell Meter software, select “Calibration” from the “Options” menu.

3.  Choose the cell you want to calibrate and click the “Calibrate Cell” button.

Calibration Block (#150-80-101)

4.  Adjust the LVDT head up and down on the stand until the voltage reads 0. 

Tighten the locking nut and use the micrometer for fine adjustments.

5.  Place the calibration block (#150-80-101) on the surface of the cup and 

rest the LVDT rod on the portion of the block that reads .20. Be sure to let 

the reading stabilize before continuing.

6.  Click “Accept”.

7.  Repeat steps 5 and 6 with each level on the calibration block.

8.  After measuring all five levels, click the “Save” button to finish.

Summary of Contents for 150-80

Page 1: ...r 150 80 115V 150 80 1 230V Software Version 3 09 0 Instruction Manual Updated 6 28 2018 Ver 6 0 OFI Testing Equipment Inc 11302 Steeplecrest Dr Houston Texas 77065 U S A Tele 832 320 7300 Fax 713 880...

Page 2: ...Software 6 Zeroing the Channels 8 Calibration 9 Starting a Test 10 Setup 12 Analog Input 13 Operation 14 Sample Data 15 Graph 1 16 Graph 2 17 Graph 3 18 Graph 4 19 Compactor 20 Assembly 20 Making Wafe...

Page 3: ...riable Differential Transducer LVDT measures the expansion of the wafer in the vertical direction accuracy to 0 1 and this information is then stored as a function of time via the data acquisition sys...

Page 4: ...up 150 80 036 Cap for Wafer Tube 150 80 064 LVDT 150 80 094 Cable LVDT to Swell Meter 150 83 Stirring Hot Plate 120 Volt Only 150 84 Stirring Hot Plate 230 Volt Only 152 37 AC Power Cord 3 Conductor 1...

Page 5: ...ge 26 Adjust the height of the head assembly such that there is a small gap approximately 5 mm between the bottom of the nut on the spindle and the body of the LVDT without a wafer inserted into the c...

Page 6: ...s located on the back of the Swell Meter are in the OFF position and make the necessary electrical connections in accordance to local codes Ensure that the unit is grounded 7 Make sure the computer is...

Page 7: ...or later choose Swell Meter V2 If you are not sure look at the cable connecting the computer to the Swell Meter If it is a flat wide ribbon cable select Swell Meter If it is a standard USB cable sele...

Page 8: ...r has been configured to run eight cells instead of just four you will need to change the Number of Cells Available option on the Setup screen to 8 This will enable to software to run all eight cells...

Page 9: ...swell during the test 1 Click the Zero Start Stop button 2 Repeat the following steps for each channel to be tested a Enter a test name and any comments b Place two screens into a fully assembled cup...

Page 10: ...ing on the bottom of the cup 2 In the Swell Meter software select Calibration from the Options menu 3 Choose the cell you want to calibrate and click the Calibrate Cell button Calibration Block 150 80...

Page 11: ...Place a screen on both sides of the compacted wafer and insert it into the wafer tube with the transfer stand on top of it 4 Place the LVDT spindle on top of the transfer stand 5 Click the Zero Start...

Page 12: ...that was recorded when the channel was zeroed This value is subtracted from the current raw distance reading to calculate the corrected distance inches mm Init Samp This is the initial distance of th...

Page 13: ...alue in this field is set to 0 0010 a data point will be recorded whenever the corrected distance changes by more than 0 001 Units are determined by the Distance Unit field below Swell To record a dat...

Page 14: ...rease in temperature To test the transducer move it up and down and observe the graph The distance line should move accordingly If the graph does not react as expected the communication between the Sw...

Page 15: ...in the cap 7 Turn on left knob the heated magnetic stirrer To heat the fluid sample turn the right knob and read the temperature in the Temp field in the software The maximum temperature of the hot pl...

Page 16: ...erred to as Rev Dust The wafers were compressed at 6 000 PSI for 30 minutes The results and interpretation of the graphs using micro and macro temporal criteria clearly explain the following phenomena...

Page 17: ...ol acted as the better shale stabilizer exceeding all other fluids The amount of expansion stayed in a straight line of zero slope indicating a very positive balanced activity resulting in an ideal co...

Page 18: ...x 713 880 9886 www ofite com 17 Sample Data Graph 2 Graph No 2 shows results obtained over an 8 hour time period and shows in greater detail the changes that occurred between the base fluids prior to...

Page 19: ...confirming an immediate interaction between the clay and the fluid bases The potassium acetate fluid initially showed the highest rate of expansion of the shale and this state continued up to around...

Page 20: ...te interaction between the clay and the fluid The fresh water initially showed the least amount of hydration of the four bases The yellow curve of potassium acetate had the highest rate of expansion a...

Page 21: ...ed vessel capable of very high pressures extreme care should always be taken by the operator and anybody that is nearby The Compactor can make two wafers at a time Since the Compactor does not require...

Page 22: ...rt the assembly and pour the sample to be tested into the small opening of the cell body The amount should not be less than 10 grams and not more than 20 grams 3 Insert the thin 14 mm spacer in the ce...

Page 23: ...umping the hand pump handle will apply pressure to the Compactor The pedestal base and the cell assembly will begin rising in the Compactor Observe the pressure gauge on the front of the Compactor and...

Page 24: ...and the spacer from the opposite end of the cell body 7 Drop the tall 20 mm spacer and position it in place where the thin spacer had been Re position the piston as before 8 Replace the cell assembly...

Page 25: ...crest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 24 Drawings Cup Assembly Brass Weight Optional Transfer Stand Cap for Wafer Tube Bottom Plate Teflon Washer Wafer Tube Mag...

Page 26: ...OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 25 Drawings Head Assembly...

Page 27: ...OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 26 Drawings Main Assembly Cup Assembly Magnetic Stirrer Head Assembly...

Page 28: ...OFITE 11302 Steeplecrest Dr Houston TX 77065 USA Tel 832 320 7300 Fax 713 880 9886 www ofite com 27 Drawings Wafer Die Specimen Removal Specimen Creation...

Page 29: ...ny losses or damages that occur as a result of Improper installation or maintenance of the products Misuse Neglect Adjustment by non authorized sources Improper environment Excessive or inadequate hea...

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