OfiTE 800 Manual de usuario

Model 800 Viscometer

#130-10-C/#130-11-C - With Carrying Case and Power Supply

#130-10-L - With Retractable Legs (For Kits)

Instruction Manual

Updated 3/16/2022

Ver. 11

OFI Testing Equipment, Inc.

11302 Steeplecrest Dr. · Houston, Texas · 77065 · U.S.A.

Tele: 832.320.7300 · Fax: 713.880.9886 · www.ote.com

©Copyright OFITE 2015

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 1

Introduction.....................................................................................2

Description......................................................................................2

Components ...................................................................................3

Specications .................................................................................5

Safety...............................................................................................8

Setup.............................................................................................. 11

Calibration.....................................................................................12

Operation.......................................................................................15

Calculations ..................................................................................17

Disassembly .................................................................................17

Maintenance..................................................................................18

Warranty and Return Policy ........................................................23

Table of

Contents

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 2

The Model 800 8-Speed Electronic Viscometer is designed and exclusively

manufactured by OFI Testing Equipment, Inc. It is extensively used worldwide

in both the eld and laboratory for the precise measurement of rheological

properties of uids.

The OFITE Model 800 Viscometer determines the ow characteristics of oils

and drilling uids in terms of shear rate and shear stress over various time

and temperature ranges at atmospheric pressure. Speeds are easily changed

with a control knob, and shear stress values are displayed on a lighted

magnied dial for ease of reading.

The viscometer’s motor RPM is continuously monitored and automatically

adjusted by the OFITE Pulse-Power electronic speed regulator to maintain

a constant shear rate under varying input power and drilling uid shear

conditions. The eight precisely regulated test speeds (shear rates in RPM)

are as follows: 3 (Gel), 6, 30, 60, 100, 200, 300, and 600. A higher stirring

speed is also provided. Speeds may be changed with a control knob

selection, without stopping the motor.

The Model 800 is suitable for both eld and laboratory use and uses a

motor-driven electronic package to provide drilling uid engineers with

an extremely accurate and versatile tool. The Model 800 operates from a

13–16 VDC power source. The electronic regulator continuously monitors

and automatically adjusts the rotational speed to maintain a constant shear

rate under varying uid shear conditions and input power variations that are

commonly found on-site.

Introduction

Description

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 3

#130-10 Model 800 8-Speed Viscometer

#130-10-2 Speed Reference PC Board (For 130-10 Model Only)

#130-10-3 Speed Control PC Board (For 130-10 Model Only)

#130-10-5 Switch Plate

#130-10-6 Wiring Harness

#130-10-8-1 Encoder Disc

#130-10-14 Motor (For 130-10 Model Only)

#130-10-16 Belt

#130-10-17 Cover

#130-10-18 Lens for Cover

#130-10-20 Torsion Shaft

#130-10-22 Card Guide for PC Boards

#130-10-61 Light Assembly

#130-21 Cup, Stainless Steel

#130-76-28 Motor (For 130-11 Model Only)

#132-50 Rotor Drive

#132-56 Rotor Sleeve, R1, 303 Stainless Steel

#132-57 Shield

#132-58 Bob, B1, 303 Stainless Steel

#132-59 Bearing Retainer

#132-71 Bearing

#132-74 Locking Ring, 1.653"

#132-75 Locking Ring, ½"

#132-76 Locking Ring,    "

#134-05-2 Shielded Bearing for Bob Shaft

#134-10 Torsion Spring Assy, F1

#134-39 Clamp Sleeve for Torsion Spring

#134-40 Shim, ⅝" × ⅜"

#135-02 External Retainer Ring

#135-18 Socket Set Screw

#142-63 Locking Screw

#163-26 Small Clip

#170-21 Stand Support Rod

#170-44 Rubber Foot, ½"

#171-32 Midget Knob

Case:

#130-10-13-5 Carrying Case with Custom Foam Insert (For 130-10 Only)

#130-11-13-5 Carrying Case with Custom Foam Insert (For 130-11 Only)

Components

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 4

Optional:

#132-56-C R1 Closed-Cup Rotor; 316 Stainless Steel (For completion and

fracturing uid testing.)

#130-45-1 Calibration Instrument

#132-80 Calibration Fluid, Certied, 100 cP, 16 oz

Additional Bobs, Sleeves, and Springs:

#132-58-1 B2 Bob, 303 Stainless Steel

#132-58-2 B3 Bob, 303 Stainless Steel

#132-58-3 B4 Bob, 303 Stainless Steel

#132-58-4 B5 Bob, 303 Stainless Steel

#132-58H B1 Bob, Hastelloy®

#132-56H R1 Sleeve, Hastelloy®

#134-10-2 F0.2 Torsion Spring Assembly (Green)

#134-10-3 F0.5 Torsion Spring Assembly (Yellow)

#134-10-4 F2.0 Torsion Spring Assembly (Red)

#134-10-5 F3.0 Torsion Spring Assembly (Purple)

#134-10-6 F4.0 Torsion Spring Assembly (White)

#130-10-SP One Year Spare Parts

#130-10-18 Lens for Cover

#130-10-503 Fuse, 4 Amp, Qty: 4

#130-10-61 Light Assembly

#130-48 Retaining Ring Pliers, Internal

#130-76-47 Retaining Ring Pliers, External

#132-59 Bearing Retainer

#132-71 Bearing, Qty: 2

#132-75 Locking Ring, ½"

#132-80 Calibration Fluid, 100 cP, 16 oz

#132-81 Calibration Fluid, 50 cP, 16 oz

#134-05-2 Shielded Bearing for Bob Shaft, Qty: 4

#134-10 Torsion Spring Assy, F1

#135-02 External Retainer Ring, Qty: 2

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 5

Specications Instrument Geometry True Couette Coaxial Cylinder

Speed Accuracy (RPM) .1

Motor Speeds (RPM) 8 Fixed Speeds (600, 300, 200, 100, 60,

30, 6, and 3)

Readout Direct Dial

Power Requirements 13 – 16 VDC

Weight (kg) 6.0

Dimensions (cm) 15.2 × 17.8 × 40.6

Shipping Weight (kg) 20.4

Shipping Dimensions (cm) 55.9 × 25.4 × 40.6

Range of Measurement for Model 800

Rotor - Bob R1B1 R1B2 R1B3 R1B4 R1B5

Rotor Radius, RR, (cm) 1.8415 1.8415 1.8415 1.8415 1.8415

Bob Radius, RB, (cm) 1.7245 1.2276 0.8622 0.8622 1.5987

Bob Height, L, (cm) 3.8 3.8 3.8 1.9 3.8

Shear Gap, (cm) 0.117 0.6139 0.9793 0.9793 0.2428

R Ratio, RB/RR 0.9365 0.666 0.468 0.468 0.8681

Shear Rate Constant kR(sec-1

per RPM) 1.7023 0.377 0.2682 0.2682 0.8503

Shear Stress Constant for

E󰀨ective Bob Surface kS(cm-3)0.01323 0.02610 0.05290 0.10600 0.01541

Overall Instrument Constant,

K, with Standard F1.0 Spring,

ŋ=KfƟ/N

300 2,672 7,620 15,200 349

Max. Shear Stress,

SSMAX, (Dyne / cm2)

Constant

R1B1 R1B2 R1B3 R1B4 R1B5

F 0.2 (Green) 77.2 330 651 1,320 2,644 384

F 0.5 (Yellow) 193 840 1,657 3,359 6,730 977

F 1.0 (Blue) 386 1,680 3,314 6,717 13,460 1,955

F 2.0 (Red) 772 3,360 6,629 13,435 26,921 3,910

F 3.0 (Purple) 1,158 5,040 9,943 20,152 40,381 5,865

F 4.0 (White) 1,544 6,720 13,257 26,870 53,841 7,819

F 5.0 (Black) 1,930 840 16,571 33,587 67,302 9,774

F 10.0 (Orange) 3,860 16,800 33,143 67,175 134,603 19,548

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 6

Shear Rate Range R1B1 R1B2 R1B3 R1B4 R1B5

Shear Rate Constant, KR,

(sec-1 per RPM) 1.7023 0.3770 0.2682 0.2682 0.8503

Shear Rate, (sec-1 or 1/s)

3 RPM 5.11 1.13 0.80 0.80 2.56

6 RPM 10.21 2.26 1.61 1.61 5.11

30 RPM 51.07 11.31 8.05 8.05 25.54

60 RPM 102.14 22.62 16.09 16.09 51.07

100 RPM 170.23 37.70 26.82 26.82 85.12

200 RPM 340.46 75.40 53.64 53.64 170.23

300 RPM 510.69 113.10 80.46 80.46 255.35

600 RPM 1021.38 226.20 160.92 160.92 510.69

Viscosity Ranges<a>

(cP) R1B1 R1B2 R1B3 R1B4 R1B5

Minimum Viscosity<b>

@600 RPM 0.5<c> 4.5 12.7 25 1.2

Maximum Viscosity<d>

@3 RPM 33,000 293,920 838,200 1,672,000 38,390

<a> Computed for standard Torsion Spring (F 1.0). For other torsion springs, multiply by F factor.

<b> Lower viscosities can be measured by the Model 800, however one must take into account the

e󰀨ect of bearing drag, Taylor vortices, zero o󰀨set, etc. when looking at the expected accuracy of the

reading.

<c> For practical purposes the minimum viscosity is limited to 0.5 cP due to Taylor Vortices.

<d> Maximum viscosity is based on Maximum Shear Stress and Minimum shear rate (RPM). However,

due to practical and physical limitations, it may be di󰀩cult to take these measurements.

Shear Stress Conversions

To convert from units on left side to units on top, multiply by factor @ intercept.

Centipoise

(cP) Poise (P) g/(cm*s) (mN*s)m2mPa*s (lb*s)

100 ft2

Centipoise

(cP) 1 0.01 0.01 1 1 0.002088

Poise (P) 100 1 100 100 100 0.2088

g/(cm*s) 100 1 100 100 100 0.2088

(mN*s)m21 0.01 0.01 1 1 0.002088

mPa*s 1 0.01 0.01 1 1 0.002088

(lb*s)

100 ft2478.93 4.789 4.789 478.93 478.93 1

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 7

Shear Stress Conversions

To convert from units on left side to units on top, multiply by factor @ intercept.

Dyne/cm2Pa lb/100ft2lb/ft2DR

Dyne/cm21 0.1 0.2084 0.002084 0.1957

Pa 10 1 2.084 0.02084 1.957

lb/100ft24.788 0.4788 1 0.01 0.939

lb/ft2478.8 47.88 100 1 93.9

DR 5.107 0.5107 1.065 0.01065 1

What Bob & Spring Should I Use?

There is often confusion or misunderstanding about what a viscometer can

actually measure. For example, a viscometer with an R1 B1 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 uid with a

viscosity of 15,000, 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 uid

is going to be tested at, as well as what the expected “Apparent Viscosity”

of the uid 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.

Minimum Spring Factor (F) = RPM(max) * AV(max)

BOB(F)*90,000

Bob (F)

R1B1 1.0

R1B2 8.9

R1B3 25.4

R1B4 50.7

R1B5 2.4

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 8

Safety

Explanation of Symbols

Caution: Risk of Danger - This symbol directs the operator to consult the

instruction manual for safety related warnings. (ISO-7000-0434)

Whenever this symbol is used on the equipment, the user must

consult the manual to determine the nature of the hazard and any

actions which have to be taken.

Fuse: This is the internationally recognized symbol for a user-replaceable

fuse. This symbol will be followed by information required to guide the

user to choose the proper replacement fuse.

Direct Current (DC): This symbol indicates an input (or output) that is

direct current only. (IEC 60417-5013)

Note: This symbol will indicate important notes and helpful hints for the

operation of the equipment.

Polarity: This symbol indicates that the equipment receives positive

voltage on the center pin of the connector and the return voltage is on the

outer case.

Tip: This symbol is used to identify operational information and best

practices to obtain the most reliable data.

Caution: Note - This symbol is used to indicate statements in the manual

which warn against actions which may cause damage to the equipment

during routine service or maintenance

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 9

Electrical Requirements

The Model 800 Viscometer is to be powered by a DC power source. The

power supply for the #130-10 Model is capable of providing between 13

and 16 volts DC. The power supply for the #130-11 Model supplies 24 volts

DC. The equipment is current limited to 4 amps by a user-replaceable fuse.

However, we suggest that the power supply be current limited to less than 4

amps to provide additional protection to the equipment.

Power (On/O󰀨) Switch

Input Connector:

13 – 16 VDC Power

Inlet / Emergency

Disconnect Device

Power (On/O󰀨) Switch

Input Connector:

24 VDC Power

Inlet / Emergency

Disconnect Device

When connecting the equipment to your power source, make sure that the

13-16 VDC is connected to the center pin of the connector.

The equipment is supplied with a user-replaceable fuse. This fuse must only

be replaced by a 250-volt, 4-amp, time-delayed fuse.

Environmental Conditions

The equipment is designed for use in normal environmental conditions:

- Indoors

- At or below an altitude of 2,000 m (6,562 ft)

- In temperatures between 5° and 40°C (41°–104°F)

- With a maximum relative humidity of 80% for temperatures up to 31°C

(88°F) decreasing linearly to 50% relative humidity at 40°C (104°F)

- This equipment has not been rated according to IEC 60529

Installation

The Model 800 Viscometer should be used in a location where it will not be

subjected to excessive moisture. It should be placed on a at, stable surface

in a well-ventilated environment.

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