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III.Instrument Operation

If the platinum plate / ring or beaker is not clean, the measured value will have error with
poor repeatability, being unstable or having continuous increase or decrease. Please keep
clean.
For example, when testing water, if you touch the water with finger the tension value will
be smaller, because the finger oil can change surface properties of water. Please keep the
platinum plate/ring and beaker clean (ultrasonic cleaning then drying before use).

3.1 Instrument calibration

1) Level calibration

Let the device stand still for 1-2 hours, observe whether the calibration bubble on the

back is in the middle. If not, there is no level.

Calibration method: turn adjustment knob until the bubble is in the middle of level.

2) Scale calibration
Put on the supporter. When screen is stable, press "TARE" to reset, then it shows “0.0000
g”. Long press "CAL", then "CAL" and

didi

sound shows, flashing 100.0000 g. If it shows

100g when 100-g weight is put, the correction is success (please don’t

touch the weights by hand directly)

Note

: In correction, long press "MENU" and "CAL", then "CAL" and

did

i sound shows,

flashing 20.0000g.put into the 20-g weight and make correction.
3) Temperature calibration
Click "Parameter setting" on the touch screen.

Summary of Contents for HZ1731

Page 1: ...HZ1731 Full Automatic Surface Tension Tester User Manual Huazheng Electric Manufacturing Baoding Co Ltd ...

Page 2: ...anual and operate and maintain the instrument according to the manual to prolong its service life Just a light press the test will be completed automatically is the operating characteristics of this instrument If you are satisfied with this instrument please tell your colleagues if you are not satisfied with this instrument please call 0312 6775656 to tell you to serve you at all times Baoding Hua...

Page 3: ...Contents I Summary 4 II Instrument Introduction 6 III Instrument Operation 10 IV Attention 14 V Appendix 15 ...

Page 4: ...r attraction The resultant force on a molecule by surrounding molecules inside the liquid is 0 However that on the surface is not zero because attraction on the molecule on the surface by gas phase molecular in the upper space is smaller than that by the internal liquid phase molecule The resultant force is perpendicular to the liquid inside resulting in automatic contracting trend in the surface ...

Page 5: ...iquid surface the equilibrium value is measured by the sensor and converted to the surface tension value to display 1 3 Platinum ring method A circular membrane between testing part and the liquid sample will be formed with this method Steps 1 Immerse the platinum ring gently into liquid inside 2 The platform descends and then a bubble film forms below the platinum ring and eventually leaves it 3 ...

Page 6: ...sing software 2 2 Function Platinum plate method and platinum ring method for wide appliance Automatic and intelligent operation and data acquisition minimizing artificial operation error Imported key parts including sensors making test data in good accuracy and repeatability Data automatic generation storage and printing Stable operation with low noise 2 3 Preparation Please make sure the followi...

Page 7: ...2 4 Instrument panorama 2 5 Touch screen Home Parameter setting ...

Page 8: ...a time and can t bring up the history data Preparation connect the software CD and software dog connect the power cord with a computer and start up Software installation Open the installation CD which contains the PZ series of surface tension control system USB serial port driver and CH340 driver USB serial driver Driver installation Select the USB serial driver select the suitable driver accordin...

Page 9: ...corresponding folder in other systems CH340 driver USB serial driver installation Double click CH340 driver USB serial driver select the installation Right click my computer open the device manager and check the port if there is a yellow exclamation mark right click Prolific USB to Serial Comm Port select update driver software and browse the driver files on the computer to find the driver in the ...

Page 10: ...on Let the device stand still for 1 2 hours observe whether the calibration bubble on the back is in the middle If not there is no level Calibration method turn adjustment knob until the bubble is in the middle of level 2 Scale calibration Put on the supporter When screen is stable press TARE to reset then it shows 0 0000 g Long press CAL then CAL and didi sound shows flashing 100 0000 g If it sho...

Page 11: ...make infiltration with test liquid a little ethanol beaker and pour it out Let sample stage go down and put into liquid to be tested Click Ring method Platform fall to make platform down to the lowest and stop automatically Add ethanol into the beaker after infiltration and put the beaker on the platform Burn platinum ring and reset Gently remove the ring with tweezers the ring is round deformatio...

Page 12: ...nstall the holder and make it near the inside avoiding directly leaning on the connecting rod between sample stage and host Set parameter Click Parameter setting set Rise speed Fall speed Because liquid membrane tension occurs when sample table falls fall speed should be slow as far as possible Clean beaker and make infiltration Wash a beaker with distilled water and make infiltration with test li...

Page 13: ...perimental data in the current test more tests are needed for sample of high viscosity Repeat tests Please clean the plate with slowly running clear water before burning If possible please use the ultrasonic water to prevent the plate from being destroyed by material difficult to burn in the liquid to be tested Repeat steps Change the ethanol into distilled water and repeat steps 3 4 Parameter cal...

Page 14: ...ut the ideal and measured tension value of distilled water and ethanol on the interface and then calculate correction coefficient respectively 3 5 Actual operation Replace the ethanol or distilled water with the liquid to be tested and repeat the above operation 3 2 for ring or 3 3 for plate IV Attention 4 1 Low high value Platinum plate or ring is not burnt clean most likely the beaker is not cle...

Page 15: ...is changing with time The liquid should be stirred evenly with the same ratio and in full rest 4 3 Platinum ring plate maintenance To keep the experiment accuracy please make sure platinum ring is standard round Please put deformed one back to the container and gently smooth it with tweezers If the ring is deformed badly or damaged please buy a new one Check whether the platinum ring on the holder...

Page 16: ... 1 235 73 93 13 0 99940 1 202 73 78 14 0 99927 1 169 73 64 15 0 99913 1 139 73 49 16 0 99897 1 109 73 34 17 0 99880 1 081 73 19 18 0 99862 1 053 73 05 19 0 99843 1 027 72 90 20 0 99823 1 002 72 75 21 0 99802 0 9779 72 59 22 0 99780 0 9548 72 44 23 0 99756 0 9325 72 28 24 0 99732 0 9111 72 13 25 0 99707 0 8904 71 97 26 0 99681 0 8705 71 82 27 0 99654 0 8513 71 66 28 0 99626 0 8327 71 50 29 0 99597 ...

Page 17: ... the air interface of ethanol at different temp t d g cm3 η 10 3Pa s γ mN m 20 0 795 1 18 22 3 30 0 785 0 97 21 2 40 0 777 0 82 20 4 50 0 765 0 69 19 8 60 0 755 0 58 18 8 70 0 746 0 505 18 80 0 735 0 44 17 15 90 0 73 0 38 16 2 100 0 716 0 34 15 2 ...

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