RIGCHINA-direct reading viscomete | MODEL RC-35 | versatile instruments for research or production use
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RIGCHINA-direct reading viscomete | MODEL RC-35 | versatile instruments for research or production use - 1

RIGCHINA GROUP COMPANY MODEL RC-35 Viscometer Instruction Manual Contact RIGCHINA GROUP Company for more information on our complete line of drilling fluids testing equipment and instrumentation for oil and gas industry. Call us today, or visit our website at www.rigchina.com Tel: 86-579-87537698(switchboard), 86-13819904200 Fax : 86-579-8753 696 Rev.B URL: http://www.rigchina.com, Email: sales@rigchina.com MSN:rigchina@hotmail.com Add: No.80-82, Qiude Rd, West Cheng Industrial Estate, Yongkang city Zhejiang Province, China

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RIGCHINA-direct reading viscomete | MODEL RC-35 | versatile instruments for research or production use - 2

Tel: 86-579-87537698(switchboard), 86-13819904200 Fax : 86-579-8753 696 Rev.B URL: http://www.rigchina.com, Email: sales@rigchina.com MSN:rigchina@hotmail.com Add: No.80-82, Qiude Rd, West Cheng Industrial Estate, Yongkang city Zhejiang Province, China

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RIGCHINA-direct reading viscomete | MODEL RC-35 | versatile instruments for research or production use - 3

RIGCHINA GROUP COMPANY 1. Description: RIGCHINA GROUP Company produces a range of true Couette coaxial cylinder rotational viscometers. The test fluid is contained in the annular space or shear gap between the cylinders. Rotation of the outer cylinder at known velocities is accomplished through precision gearing. The viscous drag exerted by the fluid creates a torque on the inner cylinder or bob. This torque is transmitted to a precision spring where its deflection is measured and then related to the test conditions and instrument constants. This system permits the true simulation of most...

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RIGCHINA-direct reading viscomete | MODEL RC-35 | versatile instruments for research or production use - 4

RIGCHINA GROUP COMPANY Model RC-35 Viscometer RIGCHINA Model RC-35 Viscometers are versatile instruments for research or production use. They can be used wherever a regulated-frequency power source is available. The Model RC-35 Viscometer is widely known as the “Standard of the Industry in China” for drilling fluid viscosity measurements. In the six-speed models, test speeds of 600, 300, 200, 100, 6 and 3 rpm are available via synchronous motor driving through precision gearing. Any test speed can be selected without stopping rotation. The shear stress is displayed continuously on the...

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RIGCHINA-direct reading viscomete | MODEL RC-35 | versatile instruments for research or production use - 5

RIGCHINA GROUP COMPANY Torsion Spring Assembly Gear Shift Knob Lens Gel Knob Dial Pointer Gas Purge Nipple (optional) Coupling Bob Shaft Bearings Splash Guard Stop Scribed Line Motor Speed Switch Circulating Cup Sample Fill Line (350 ml) Locking Knob Tel: 86-579-87537698(switchboard), 86-13819904200 Fax : 86-579-8753 696 Rev.B URL: http://www.rigchina.com, Email: sales@rigchina.com MSN:rigchina@hotmail.com Add: No.80-82, Qiude Rd, West Cheng Industrial Estate, Yongkang city Zhejiang Province, China

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RIGCHINA-direct reading viscomete | MODEL RC-35 | versatile instruments for research or production use - 6

RIGCHINA GROUP COMPANY SECTION 2 SAFETY CONSIDERATIONS A. SAFE OPERATION The safe operation of the RIGCHINA Model RC-35 Series Viscometer requires that the laboratory technician be familiar with the proper operating procedures and potential hazards associated with the instrument. This instrument is driven by 220 volt electrical power. Keep hands, clothes and other objects away from the rotating parts of the machine The optional heated sample cups and recirculating sample cups are electrically heated. Make sure the power cord and other wiring associated with these cups is no good condition...

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RIGCHINA-direct reading viscomete | MODEL RC-35 | versatile instruments for research or production use - 7

RIGCHINA GROUP COMPANY Table 1 lists the proper positions for the viscometer switch and the gear knob combinations to obtain the desired speed. The viscometer gear shift knob may be engaged while the motor is running. Read the dial for shear stress values. TABLE 1 SIX-SPEED TESTING COMBINATIONS Viscometer Switch Gear Knob have twelve speed testing capabilities. To achieve this broader testing range (from 0.9 rpm up to 600 rpm) an additional gear box shift lever is used and it is located on the right side of the gear box. Refer to Fig.2.Position this lever to the Left or Right as determined...

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RIGCHINA-direct reading viscomete | MODEL RC-35 | versatile instruments for research or production use - 8

RIGCHINA GROUP COMPANY TABLE 2 TWELVE-SPEED TESTING COMBINATIONS MODEL RC-35/RC-12 RPM Speed Switch Viscometer Gear Knob C. GEL STRENGTH Gel strengths are measured by first stirring the sample thoroughly at 600 rpm. Set gears to the neutral position and turn motor off. After desired wait period, turn gel knob, located below gear shift knob, refer to Fig. 1, slowly counterclockwise and read the dial at instant of the gel break (Peak Dial Reading). Gel reading is in lbs/100 ft2. Tel: 86-579-87537698(switchboard), 86-13819904200 Fax : 86-579-8753 696 Rev.B URL: http://www.rigchina.com, Email:...

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RIGCHINA-direct reading viscomete | MODEL RC-35 | versatile instruments for research or production use - 9

RIGCHINA GROUP COMPANY Fig. 3 Rotor Removal / Installation Tel: 86-579-87537698(switchboard), 86-13819904200 Fax : 86-579-8753 696 Rev.B URL: http://www.rigchina.com, Email: sales@rigchina.com MSN:rigchina@hotmail.com Add: No.80-82, Qiude Rd, West Cheng Industrial Estate, Yongkang city Zhejiang Province, China

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RIGCHINA-direct reading viscomete | MODEL RC-35 | versatile instruments for research or production use - 10

RIGCHINA GROUP COMPANY Fig. 4 Torsion Spring Removal and Replacement Tel: 86-579-87537698(switchboard), 86-13819904200 Fax : 86-579-8753 696 Rev.B URL: http://www.rigchina.com, Email: sales@rigchina.com MSN:rigchina@hotmail.com Add: No.80-82, Qiude Rd, West Cheng Industrial Estate, Yongkang city Zhejiang Province, China

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RIGCHINA-direct reading viscomete | MODEL RC-35 | versatile instruments for research or production use - 11

RIGCHINA GROUP COMPANY SECTION 4 CHANGING ROTORS, BOBS, AND TORSION SPRING The R1-B1-F1 rotor-bob-torsion spring combination is standard for all RIGCHINA viscometer. Other –rbootobr combinations may be used provided shear rates are calculated for the fluid being tested. Use of rotor-bob combinations which result in large gap sizes can lead to shear stress dial readings not consistent with readings from a smaller gap. A. Rotor removal and Replacement The rotor can be removed from its socket by twisting counterclockwise, when viewed from above, while gently pulling straight down. Refer to...

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RIGCHINA-direct reading viscomete | MODEL RC-35 | versatile instruments for research or production use - 12

RIGCHINA GROUP COMPANY Fig. 1 Dead Weight Calibration DW-3 Calibration Fixture Tel: 86-579-87537698(switchboard), 86-13819904200 Fax : 86-579-8753 696 Rev.B URL: http://www.rigchina.com, Email: sales@rigchina.com MSN:rigchina@hotmail.com Add: No.80-82, Qiude Rd, West Cheng Industrial Estate, Yongkang city Zhejiang Province, China

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RIGCHINA-direct reading viscomete | MODEL RC-35 | versatile instruments for research or production use - 13

RIGCHINA GROUP COMPANY SECTION 5 INSTRUMENT CALIBRATION Periodically the Model RC-35 Series Viscometer should be checked for proper calibration and if found in error the viscometer should be calibrated or repaired. Continued accuracy of measurements requires the instrument be properly calibrated. The calibration is checked by applying know torques to the bob shaft. For any applied torque, within the torque range of the spring, there should be a specific dial reading plus or minus a small tolerance. Two methods of calibration are described. The Dead Weight Calibration is easier to perform...

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