Ametek Chandler Engineering 8040D10 User manual

INSTRUCTION MANUAL
MODEL 8040D10
PRESSURIZED CONSISTOMETER
Revision P – April 2015
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Copyright 2015, by Chandler Engineering Company, LLC
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TABLE OF CONTENTS i
Table of Contents
General Information .......................................................................P-1
Application of the Consistometer.....................................................................................................P-1
Test Procedure................................................................................................................................P-1
Description of Apparatus.................................................................................................................P-1
Specifications..................................................................................................................................P-3
Section 1 - Installation.................................................................... 1-1
Unpacking the Instrument................................................................................................................1-1
Utility Requirements........................................................................................................................1-1
Tools and Equipment Required........................................................................................................1-1
Setting up the Instrument ................................................................................................................1-1
Connecting Air and Water ...........................................................................................................1-1
Connecting Power to the Consistometer......................................................................................1-2
Section 2 – Operating Instructions................................................. 2-1
Training...........................................................................................................................................2-1
Preparing the Instrument for a Test..................................................................................................2-1
Configuring the Consistency Display............................................................................................2-1
Programming the Temperature and Pressure Controllers..............................................................2-1
API Slurry Cup Preparation.........................................................................................................2-1
Running a Test................................................................................................................................2-3
After the Test is Complete...............................................................................................................2-5
Cooling the Cylinder....................................................................................................................2-5
Section 3 - Maintenance................................................................. 3-1
After Every Test..............................................................................................................................3-1
Pressure Cylinder.........................................................................................................................3-1
Potentiometer Mechanism............................................................................................................3-1
Slurry Cup...................................................................................................................................3-1
Thermocouple (Slurry Cup).........................................................................................................3-1
Monthly ..........................................................................................................................................3-2
Potentiometer Mechanism............................................................................................................3-2
Resistor Replacement ..................................................................................................................3-2
Calibration Spring Replacement...................................................................................................3-2
Potentiometer Calibration............................................................................................................3-2
Magnetic Drive............................................................................................................................3-3
High Pressure Filter.....................................................................................................................3-4
Thermocouple and Temperature Control System.........................................................................3-4
Three Months..................................................................................................................................3-4
Oil & Filter..................................................................................................................................3-4
Drive Motor................................................................................................................................3-4

ii TABLE OF CONTENTS
Six Months......................................................................................................................................3-5
Timer ..........................................................................................................................................3-5
Air Operated Valve......................................................................................................................3-5
Annually..........................................................................................................................................3-5
Pump...........................................................................................................................................3-5
Reservoir.....................................................................................................................................3-5
Heater.........................................................................................................................................3-5
Thermocouples (Slurry Cup and Cylinder) and Temperature Controller .......................................3-6
Section 4 - Troubleshooting........................................................... 4-1
Section 5 - Replacement Parts........................................................ 5-1
Section 6 - Drawings and Schematics............................................. 6-1

PREFACE P-1
General Information
Application of the Consistometer
Cements have numerous applications in the drilling, completion, work-over, and abandonment of
wells. For each application, the cement is designed with special properties and is given additives
that provide predictable slurry density, volume, viscosity, compressive strength, and thickening
time. Thickening time, or the time a cement slurry remains able to be pumped into the well, is the
most critical properties in designing a cement. A short thickening time is desired, while maintaining
the special properties of the cement's design. The thickening time of a cement can be measured in a
laboratory by testing a sample of the cement slurry in a Pressurized Consistometer. The elapsed
time between an initial application of pressure and temperature on the slurry sample and the
development of 100 Bearden units of consistency (Bc) is the thickening time for the sample at a
particular specification test schedule [Table 8.2, API Spec 10(1)].
Test Procedure
Briefly, the test procedure for the Model 8040D10 Pressurized Consistometer entails the
preparation of the slurry sample, placing it in the Consistometer, applying pressure and increasing
temperature according to the API Spec 10 Code Schedule(1), and recording the consistency of the
slurry as a function of time. Details of the procedure are contained in the Specification.
Description of Apparatus
The Pressurized Consistometer incorporates a rotating, cylindrical Slurry Cup equipped with a
stationary paddle assembly enclosed in a pressure chamber designed for a working pressure of 275
MPa (40,000 psi) at a maximum temperature of 315°C (600°F). (An air-operated hydraulic pump
generates pressure to the cylinder assembly.) The hydraulic system incorporates a reservoir, piping,
valves and filters. Heat is supplied to the chamber by a 5000-watt, internal, tubular heater
controlled by the automatic temperature control system program. Thermocouples are provided for
determining the temperatures of the oil bath and cement slurry.
The programmable temperature controller will automatically control the rate of temperature rise of
the slurry (i.e. temperature gradient). When the slurry reaches the desired maximum temperature,
the controller will hold the slurry temperature at that level. Pressure settings are maintained
through the control of a pressure release valve and air pressure available to the pump.
The slurry container is rotated at a constant speed of 150 +/- 15 rpm by a Magnetic Drive (Drawing
8-229). Drive torque is transmitted from a set of outside drive magnets, through a non-magnetic
housing, to permanent magnets attached to the rotating shaft within the cylinder. Permanent, rare
earth magnets are used to ensure high torque and a long magnetic-field life.
REFERENCES
American Petroleum Institute; API Specification for Materials and Testing for Well Cements, Latest Edition; Dallas,
TX.

P-2 PREFACE
The viscosity (i.e. consistency) of the cement slurry is indicated by a meter and is recorded on a
chart as a DC voltage obtained from a potentiometer installed within the pressure cylinder. The
potentiometer contains a standardized torsion spring, which resists the rotating force of the paddle.
Rotational force is proportional to consistency of the cement slurry.
The chart recorder is configured at the factory and will be ready for use at power-up. A manual has
been enclosed for your reference.
The Bearden unit indicator is pre-configured at the factory to alarm at 100 Bc. The alarms control
four items. First, an audible alarm is triggered; second, the heater current is cut off; third, the motor
is shut off; and fourth, the timer is stopped.

PREFACE P-3
Specifications
This unit is in complete compliance with API Spec 10A
Model 8040D10
Maximum Temperature: 600°F (315°C)
Maximum Pressures: 40,000 psi (275 MPa)
Heater Power: 5,000 Watts
Slurry Cup Rotational Speed: 150 rpm
Viscosity Range: 0-100 Bc (Bearden Units)
Pressurizing Medium: White Mineral Oil
Mechanical and Electrical
Input Voltage: 240 VAC ± 15% 50/60 Hz
Input Power: 7.5 kva
Heater Wattage: 5,000 watts
Shipping Dimensions and Weight
Dimensions Weight
In. cm lbs. Kg
Model 8040D10 56 x 38 x 75 142 x 96 x 190 2400 1090
Environment and Utility
• Operating Temperature: 40° to 120°F (0 to 50°C)
• Compressed Air: 75 to 125 psi (517 to 862 kPa)
• Cooling Water: 20 to 80 psi (138 to 552 kPa)

P-4 PREFACE
This page is intentionally left blank.

SECTION 1 – INSTALLATION 1-1
Section 1 - Installation
Unpacking the Instrument
After the consistometer is unpacked, the operating equipment and spare parts on the packing
list should be checked to affirm that all have been received and none are damaged.
File an insurance claim with your freight carrier if damage has occurred during shipment.
Utility Requirements
Your unit will require dry, oil-free compressed shop air (not instrument quality) of 75 to 125
psi, and a water supply of 20 to 80 psi. The unit is capable of operating in ambient
temperatures from 40°F to 120°F.
Tools and Equipment Required
A standard maintenance or mechanics tool set is adequate for the installation, operation, and
maintenance of the instrument. No special tools are required.
This unit is supplied with an installation kit, which includes the necessary hardware for the
water, air, and electrical hook-ups. The water and air hose may be cut to length and the
appropriate barbed fittings inserted into the hose and clamped into place.
Caution: The laboratory electrical power wiring must be capable of a 50-ampere
load and comply with local electrical codes. The instrument must be
securely connected to an appropriate earth ground. The ground wire must
have a larger diameter than that of the supply voltage conductors.
Setting up the Instrument
Connecting Air and Water
Water and air hose hook-ups are located at the lower rear of the instrument. Use the adapters
provided in the accessory kit for each of these connections. All of the fitting threads are 1/4”
NPT.
1. Connect the air supply line to the inlet labeled AIR.
2. Connect the water supply line to the inlet labeled WATER IN.
3. If the optional chiller is being used, connect the outlet port of the chiller system to the
water inlet port and the water drain port to the chiller inlet port. Configure the chiller to
operate at the minimum set-point temperature (41°F, 5°C).
4. Connect the water drain line to the outlet labeled WATER OUT.

1-2 INSTALLATION
Connecting Power to the Consistometer
1. Connect the supplied twist-on power connectors to the receptacles at the rear of the unit.
2. Connect the power plugs to an appropriately rated power source and receptacle. For user
safety a power plug and mating receptacle are required.
Note: This receptacle MUST be properly grounded.

SECTION 2 - OPERATION 2-1
Section 2 – Operating Instructions
Training
On site training classes are available. For more information, contact our Sales Department at
Chandler Engineering.
Preparing the Instrument for a Test
Prior to running a test, the following steps must be performed.
Configuring the Consistency Display
1. Turn on the instrument.
2. Press or (Up or Down) to change the alarm limit.
A manual has been enclosed for your reference.
Programming the Temperature and Pressure Controllers
The programming for the temperature and pressure controllers is identical. Following is a
brief procedure for programming the controllers. For complete instructions, see the Model
8050/8051 Temperature Controller and Model 8060/8061 Pressure Controller manuals.
1. Press and hold the Advance key for approximately five seconds. The profile prompt
(ProF) will appear in the lower display and the profile number (e.g. P1) appears in the
upper display.
2. Multiple profiles (P1 to P4) can be stored in the device. The shortcut keys (EZ1 and EZ2)
are factory configured to start and stop profile P1. The 5270 DACS software also utilizes
P1 when a profile is downloaded to the controller for an automated test. Press the Up
or Down keys to select P1.
3. Press the Advance Key to move to the first step.
4. Press the Up or Down keys to move through and select the step type.
5. Press the Advance Key to move through the selected step settings.
6. Press the Up or Down keys to change the step settings.
7. Press the Infinity Key at any time to return to the step number prompt.
8. Press the Infinity Key again to return to the profile number prompt.
9. From any point press and hold the Infinity Key for two seconds to return to the Home
Page.
10. To manually start or stop a profile, press either the EZ1 or EZ2 key.
API Slurry Cup Preparation
For an accurate thickening time test to be performed, it is important for the slurry cup to be
properly maintained and prepared. The following procedure should serve as a guideline for
slurry cup preparations. While assembling the slurry cup, refer to drawing 07-0031 in the

2-2 OPERATION
Drawings and Schematics section of this manual.
Thoroughly clean all parts and verify that all parts are in good condition.
1. Lightly grease all interior surfaces of the slurry cup with white lithium grease or the
equivalent.
2. Install the diaphragm support ring, the diaphragm, and the diaphragm backup plate onto
the paddle assembly. The diaphragm should be oriented so that the larger brass piece is at
the top.
3. Slide the shear pin assembly onto the paddle shaft. Place the potentiometer mechanism on
the paddle shaft until it seats. Using an Allen wrench, align the shear pin assembly into the
bottom of the potentiometer mechanism and tighten the set screw to secure it in place.
Remove the potentiometer mechanism from the paddle shaft.
Diaphragm
Back-up Plate
Diaphragm
Support Ring
Diaphragm

SECTION 2 - OPERATION 2-3
4. Install the complete paddle assembly into the slurry cup.
5. Screw the diaphragm lock-down ring into the top of the slurry cup while checking to
make sure the paddle turns freely.
6. Invert the slurry cup into the slurry cup support.
7. Prepare the cement slurry in accordance with API Spec 10.
Caution: According to API specs: The cement has to be under test (under pressure)
within 5 minutes of mixing.
8. Fill the cup with prepared cement slurry to the bottom of the threads.
9. Remove the plug (pivot) from the center of the bottom cap.
10. Replace the bottom cap without the plug. Slowly screw the cap into place and add
cement through the hole if required.
11. Grease the plug and replace.
12. Rinse the exterior surfaces of the slurry cup.
Running a Test
Air pressure, temperature, and oil viscosity will all have a significant effect on the time
required to fill and drain the cylinder. Optimum air pressure is 100 psi. For example, with a 60
psi air supply, your fill time will be doubled and the drain time tripled over those obtainable
with a 120 psi air supply. Low ambient air temperature will have a similar effect.
At 45°F, expect the fill time to double and the drain time to be triple of those at 70°F.
1. Turn the Power switch ON.
2. Attach the long bail through the holes on the top of the prepared slurry cup and insert it
into the test cell, rotating it until the bottom pins engage the cup drive table. Remove the
bail.
Shear Pin
Assembl
y

2-4 OPERATION
3. After the slurry cup is loaded into the cell, the potentiometer mechanism (pot. mech.) is
pushed onto the slurry cup paddle shaft and the test cell contact pins. Attach the short bail
to the top of the potentiometer and lower the pot mech into the test cell. When properly
engaged, the top of the paddle shaft will be flush with the top of the torque measurement
potentiometer bearing. Remove the bail.
4. Check to be certain that the slurry cup and pot mech are properly engaged. Turn the
Motor switch to ON. No rubbing noise should be heard.
The Model 8040D10 is supplied with two types of O-ring seals for the cylinder plug. (See
drawing 08-0280, item 18.)
Caution: Selection of the proper O-ring to match the test conditions is critical.
• The viton O-ring (C09762) is suitable only for low temperature/pressure tests below
20,000 psi (138 Mpa), or 275°F (135°C).
• The metal O-ring (P-4080) is suitable for testing at any rated temperature or pressure.
5. Close the pressure cylinder by swinging the Swivel Arm Assembly and plug, vertically
above the cylinder, lowering the plug until the tapered threads engage. Screw the plug
down until it is firmly engaged. In order to assure that the cylinder will operate at the
maximum rated working pressure and temperature, we recommend that you work the
plug down until the line up mark on the plug matches the mark on the cylinder. Never run
a test with the line up mark on the plug tightened down past the mark on the cylinder.
Under these conditions, the plug may not unscrew from the cylinder without damaging the
threads or plug handles.
6. Slide the thermocouple through the test cell plug into the slurry cup paddle shaft. Start
the threads of the sealing gland into the test cell plug, but do not tighten the thermocouple
at this time. Verify that the thermocouple is plugged in.
7. Next, fill the test cell with oil. To accomplish this, close the Pressure Release Valve, turn
the CYLINDER control switch to the FILL position. When oil escapes from the top
thermocouple high-pressure fitting, tighten the sealing gland with a 5/8” wrench. Leave
the CYLINDER control switch in the FILL position during the test.
8. To apply the initial pressure to the test cell on a Model 8040D10 without pressure control,
turn the Pump Switch to the MANUAL position. When the pressure reaches the desired
level turn the Pump Switch to the OFF position. Adjust the pressure as required
throughout the test by turning the Pump Switch to MANUAL to increase pressure or by
slowly cracking open the Pressure Release Valve to relieve pressure. Use care to open the
Pressure Release Valve slowly when attempting to bleed pressure.
9. Turn the Heater Switch to the ON position, the Pump Switch to the AUTO position
(Model 8040D10 with pressure control), and start the timer. (The heater and pump will
not start until the program start up is initiated through the controller.)
10. To begin the test, the Temperature Controller and Pressure Controller (if equipped)
programs must be started as follows.
11. Press the Advance Key to display the Control Mode (AUTO, OFF or MAN). Press the
Up or Down keys to select AUTO. Press the Infinity Key to return to the main
screen. Press the EZ1 button to start the program. The “1” light should begin flashing
indicating the control output to the heater and or pump.

SECTION 2 - OPERATION 2-5
Caution: The pressure cylinder and plug may be extremely hot. Severe burns can
result from touching.
After the Test is Complete
A buzzer will sound, signaling the slurry has reached the required consistency. The controllers
must now be shut down as follows:
1. Turn the alarm switch to ‘Off.”
2. Press the Infinity Key on the consistency display to reset the alarm condition.
3. Set the heater switch to ‘Off.”
4. If the profile status light is displayed on the temperature or pressure controller screen,
press the EZ1 button to stop the profile and place the controllers in OFF mode (OFF will
appear on the lower display).
5. If OFF does not appear in the lower display, press the Advance Key to display the
Control Mode (AUTO, OFF or MAN). Press the Up or Down keys to select OFF.
Warning: If the cylinder is opened while its temperature is above 212ºF (100 ºC), steam will
escape, and the operator can be injured! Allow the unit to cool before opening the
cylinder.
Cooling the Cylinder
The cylinder cooling coil provides for cooling the cylinder rapidly prior to the start of another
test. (The coil can also be used to correct chamber overheating during a test.)
The following sequence of steps will allow the operator to manually cool down the cylinder
before removing the cup. This procedure must be carried out immediately because further
hardening of the slurry can result in damage to the Slurry Cup Paddle.
1. Set the Cool switch to ON, (manual control) in order to turn on the cooling water.
2. Set the Pump switch to MANUAL in order to circulate and cool the oil.
3. Allow the cylinder to cool to 190º F or less before continuing to the next step.
4. Open the T-handled manual pressure release valve to relieve pressure in the cylinder to be
cooled. Slowly opening and closing the valve to release pressure in increments will
prevent rupture of the Slurry Cup Diaphragm.
5. Set the CYLINDER control rocker switch to the DRAIN position to start the oil transfer.
(Completion of transfer will be indicated by a bubbling or hissing noise in the reservoir.)
6. Set the CYLINDER control rocker switch to the OFF (middle position) to stop the oil
transfer.
7. Close the T-handled manual pressure release valve.
8. Loosen the Thermocouple Seal Gland to vent the remaining air pressure from the cylinder.
9. Remove the thermocouple from the cylinder head.
10. Remove the cylinder head by tapping the cylinder head handles with a rubber mallet to jar
the head loose and then remove the head itself.
11. When the plug is removed after a test, the metal O-ring may come out with the seal shaft.
If this happens, clean the O-ring and mating surfaces and inspect for scratches or dents. If
the parts are OK, drop the O-ring back into the cylinder with the same side facing up. The
top side will be likely to have a slightly more flattened square surface.

2-6 OPERATION
12. Using the short Bail, reach into the cylinder and remove the Potentiometer Mechanism.
13. Using the Bail, reach into the cylinder and remove the Slurry Cup. The Cup should be
immersed immediately in a container of cold water, after which the slurry should be
removed from the Cup.
14. Prior to starting a new test, clean the Slurry Cup thoroughly and recoat it with grease.
Also, disassemble and clean the Diaphragm Hub and apply grease liberally to the hub O-
rings.

SECTION 3 – MAINTENANCE 3-1
Section 3 - Maintenance
The operating life of the Consistometer can be extended measurably if operating and
maintenance instructions provided in this manual are adhered to. Avoidance of down time and
parts replacement depends on the proper cleaning, lubrication, replacement of filters, and
calibration of instrumentation and controls. The following procedures will correspond with
the maintenance schedule time intervals included in this manual.
After Every Test
Pressure Cylinder
Inspect the metal O-ring on the pressure cylinder seal shaft and wipe it free of cement
particles. (The ring will seal many times if the ring and seat are kept clean.) Replace the o-
ring if any nicks, pits, or dents are present. Coat the o-ring with a thin film of molybdenum
disulfide grease before installation.
The thread of cylinder plug has been lubricated with a molybdenum disulfide grease by the
factory. If molybdenum disulfide grease is not immediately available, a mixture of white lead
and lubricating oil will be a satisfactory substitute.
Potentiometer Mechanism
The potentiometer mechanism (Pot Mech) must be cleaned after every test. Using a nylon
brush, lightly brush down the unit with a mild dish washing soap. Clean all cement sediment
from the contact springs, resistor, and exterior surfaces. Rinse the assembly thoroughly with
water. Apply a light coat of mineral oil to the resistor surface and bearings to prevent
oxidation.
Slurry Cup
1. All components of the slurry cup must be cleaned and inspected thoroughly after every
test to ensure proper operation of the consistometer.
2. Inspect the plug for any wear such as dishing or rounding out of the inner taper. Excessive
wear of the tapered seat will prevent the proper centering of the paddle shaft and result in
binding the paddle to the interior wall of the slurry cup.
3. Inspect the shaft tip for wear and ensure that the shaft is straight. Excessive wear of the
sharp tip or a bent shaft will prevent the shaft from centering in the cup base plug. Either
of these conditions will result in binding of the paddle to the interior wall of the slurry cup.
4. Replace the paddle any time damage such as bent or broken vanes exists. The paddle
weight should be recorded before the first use. Weigh the paddle after every 20 tests.
When the original weight of the paddle has dropped by 20%, replace the paddle.
Thermocouple (Slurry Cup)
Inspect the thermocouple to insure that it is straight and the threaded collar is positioned with
two threads showing on the lower side. Inspect the threaded collar and gland nut for clean and
well formed threading. Worn threading on either part presents a safety hazard to the operator.

3-2 MAINTENANCE OF CONSISTOMETER
If the threads are damaged, the thermocouple may blow out under pressure. Inspect the
exterior of the probe for thinning or nicking. Replace any or all components as required.
Monthly
Potentiometer Mechanism
The potentiometer mechanism must be completely disassembled and cleaned. If any of the
following components exhibit signs of wear, they must be replaced as follows.
Resistor Replacement
1. Remove the Shaft Bearing Retainer and Contact Arm.
2. Remove the old Resistor, using care not to damage the slot.
3. Position the new Resistor straight side down with equal overlap from the Contact Strips to
the end of the winding.
4. Seat the Resistor firmly in the slot (use a block of wood to press into position). The top
surface of the Resistor must be level.
5. Burnish the resistance wire lightly by rubbing the top surface with a hardened drill rod
shank. This will ensure that the Contact Arm slides smoothly.
6. Rotate the Contact Arm by hand. Affirm that the arm rotates smoothly and maintains
contact with the Resistor from Contact Strip to Contact Strip with no dragging. If
necessary, adjust the arm by bending it up or down.
7. Adjust the position of the Stop Arm on the Center Shaft in order to obtain strip-to-strip
travel of the Contact Arm. All set screws must be tight.
8. Replace the Shaft Bearing Retainer.
9. Calibrate the Potentiometer.
Calibration Spring Replacement
1. Remove the Shaft Bearing Retainer and Contact Arm.
2. Remove the old Calibration Spring.
3. Install a new spring (when the center shaft of the Potentiometer Mechanism is turned
counterclockwise, the spring is wound tighter).
4. Replace the Contact Arm.
5. Loosen but do not remove, three screws on underside
6. Rotate the Spring Adjuster until slack is out of the spring and the Contact Arm lines up
with the Contact Strip. Tighten the screws.
7. Replace the Shaft Bearing Retainer.
8. Calibrate the Potentiometer.
Potentiometer Calibration
Depending on the frequency of its use, the potentiometer mechanism should be recalibrated
regularly and whenever the spring, contact arm, or resistor is adjusted or replaced. Higher
operating temperatures in the pressure chamber require more frequent recalibration of the
potentiometer.

SECTION 3 – MAINTENANCE 3-3
The potentiometer mechanism and the voltage measuring circuit, which indicate consistency,
should be calibrated by using the Weight-Loaded Potentiometer Calibrating Device. This
device is used to apply torque to the potentiometer spring, using the radius of the
potentiometer frame as a lever arm.
The step-by-step calibration procedure is as follows:
1. Set the calibrator at a table's edge for free cord movement.
2. Install a potentiometer on the holder and insert the wedge into the open slot nearest the
mounting frame "Stop" contact.
3. Locate the steel cable around the potentiometer frame and over the pulley. Place the hanger
weight hook in the cord eye.
4. Install wire-end clips to the potentiometer.
5. Insert the plug on the end of the calibrator wires into the Calibrator Socket.
6. Turn on Master Switch.
7. Place 350 grams of weights on the 50 gram hanger for a total of 400 grams mass.
The Bearden Unit Gauge should read 100 Bc. (100 Bearden Units is 10 volts) The contact
points of the spring should be oiled, the weights lifted and released, and the calibrator lightly
tapped to offset friction during the calibration. If the unit does not read 100 Bc, manually
adjust the Pot Mech calibration screw located on the front panel.
The radius of the potentiometer mechanism is 5.2 centimeters and is multiplied by the total
weight on the hanger to obtain gram centimeter torque. Slurry consistency is expressed in
Bearden units where 100 Bc is equivalent to the spring deflection observed with 2080 gcm of
torque (400 grams weight) using the Weight-Loaded Calibration Device.
For further calibration details, refer to API Spec 10 booklet. This unit is supplied with weights
to accommodate the full range of tests per API specs.
Magnetic Drive
The Magnetic Drive should be flushed with clean solvent or oil whenever cement spills into
the cylinder or particles contaminate the drive. More frequent flushing of the Drive is
required when high-temperature, high-pressure tests are run.
The inner magnetic shaft must be pulled and inspected. Replace the complete assembly if the
magnet sleeve is worn through or bulging at the center. Remove the magnetic housing drain
plug and flush all cement sediment from the cylinder using solvent. Dry any remaining water
on the cylinder floor using towels. Inspect and replace the following components as required.
• Carbon bearing: Remove and clean all cement from the OD and ID of the bearing. Clean
all cement from the external grooving. Replace the carbon bearings when excessive
chipping is visible. Replace the carbon bearing if the OD or ID has lost .010” of material.
The bearing must fit snugly on the shaft with no visible wobble.

3-4 MAINTENANCE OF CONSISTOMETER
• Bronze bearing: Remove and clean all cement from the OD and ID of the bearing. Clean
all cement from the perimeter weep holes. Replace the bronze bearing if when the upper
collar has lost .030” off its original height.
• Thrust ring: Replace the ring if a groove is present on the lower side. The lower surface
should be flat with no cutting or gouging occurring from contact with the bronze bearing
collar.
• O-ring & Backup ring: Replace at every cleaning or any time the drain plug is removed.
Before the center shaft of the Magnetic Drive is reinstalled, the drain plug should be screwed
in (but not tightened) and the drive filled with clean oil. Then install the center shaft, and
pressurize the cylinder with oil (air supply pressure only) to ensure that air is not trapped in
the lower part of the drive. Oil passing by the plug will purge the air.
High Pressure Filter
Disassemble and clean as follows.
Cleaning is best achieved using an ultrasonic bath filled with a citric acid solution.
Thermocouple and Temperature Control System
API specs require that the temperature measuring system be verified for accuracy monthly. No
equipment is supplied with the unit for performing these tests. Review your API specs for
details and contact Chandler Engineering.
Three Months
Oil & Filter
The mineral oil in the reservoir should be drained and replaced when it becomes dirty. At the
same time, the oil filter element should be replaced. A drain plug is provided on the oil
reservoir, and a fill plug is located on top. Additions of mineral oil may be made by pouring
oil into the pressure cylinder. The oil level in the reservoir should be kept at 3/4 full. The
mineral oil supplied with the instrument is white technical oil (API gravity approximately 24.2,
pour point 40°C, flash 214°C, and viscosity 60 to 63 SSU at 38°C). This oil may be ordered
from the factory.
Drive Motor
API requires that the speed be checked and maintained at 150 rpm +/- 15 rpm. A motor speed
adjustment screw is located on the rear of the electrical cabinet. A tachometer for this test is
user supplied.