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ISO9001:2000 CERTIFIED
Boston • Chicago • London • Stuttgart • Guangzhou
B R O O K F IELD ENGINEERING LABORATORIES, INC .
11 Commerce Boulevard • Middleboro, MA 02346 USA
Model D Helipath Stand
Assembly & Operating Instructions
Manual No. M/82-100-I1207
TEL 5 0 8 - 9 4 6 - 6 2 0 0 o r 8 0 0 - 6 2 8 - 8 1 3 9 |
F A X 5 0 8 - 9 4 6 - 6 2 62 |
w w w . b r o o k f i e l d e n g i n e e r i n g . c o m
Model D Helipath Stand Parts Identification
REVERSING
ROD
(Top & Bottom)
BUBBLE
LEVEL
POWER
SWITCH
POWER
INDICATOR
LIGHT
DRIVE UNIT (HS-1Y)
GEAR RACK (REAR)
HELIPATH
POWER CORD
LEVELING SCREWS (2)
(VS-3)
SCREW
UPRIGHT ROD
(VS-38)
CLAMP KNOB
(VS-41Y) BUBBLE LEVEL
DISENGAGING
LEVER
ADJUSTABLE
STOP (2) (HS-23Y)
BASE with LEVELING SCREWS & BUMPER (VS-2SY)
LOCK
WASHER
VISCOMETER HEAD (not included with Helipath Stand)
CHUCK, WEIGHT & CLOSER
ASSEMBLY (BTU-18Y)
T-BAR SPINDLE (T-A thru T-F)
SPINDLE SET |
includes 6 T-Bar |
(SST) |
Spindles, T-A thru T-F, |
|
Chuck, Weight & Closer |
|
Assembly & Case |
- -
Check carefully to see that all components are received with no concealed damage.
1 |
drive unit (HS-1Y) |
Spindle Set (SST) includes: |
|
1 |
base (VS-2SY) |
• 6 T-bar spindles (T-A — T-F) |
|
2 |
leveling screws (VS-3) |
• |
1 chuck/closer/weight assembly (BTU-18Y) |
1 |
upright rod (VS-38) |
• |
1 spindle box (TU-25Y) |
2 |
adjustable stops (HS-23Y) |
|
|
Stand Assembly
Insert the upright rod in the base, positioning the gear rack facing toward the rear. Thread the screw with lock washer into rod under the base, but do not tighten. Slide one adjustable stop down the upright rod, with locking plate facing up. With the drive unit handle clamp facing forward, depress the disengaging lever and slide the drive unit down the upright rod. Slide the other adjustable stop down the upright rod above the drive unit; again, locking plate of adjustable stop faces up. Center the complete assembly between the base legs and tighten the screw into the upright rod. Install the clamp knob, but do not tighten.
Viscometer Mounting
For Dial models with serial numbers below 200,000, lower the Viscometer power cord into the handle clamp slot with the cord passing to the left of the upright rod (Dial viscometers only). For Digital models and Dial models with serial numbers above 200,000, slide the Viscometer handle core into the handle clamp and tighten the clamp knob. Check the lateral position of the Viscometer relative to the base. Make adjustments and retighten the screw as required to center the Viscometer between the base legs. Referring to the stand bubble level, adjust the base leveling screws until the stand is level. Referring to the Viscometer bubble level, position the Viscometer until the bubble is centered (right to left) and tighten the clamp knob.
CAUTION: Position power cords so they do not interfere with the travel of the drive unit.
Viscometer Operation
Note: If your viscometer was supplied with a guardleg, this guardleg is not used when using T-bar spindles. Remove it by loosening the round thumbscrew.
With the system assembled and mounted as shown in the illustration, insert the spindle into the chuck before attaching the chuck to the Viscometer. Then connect the chuck/closer/weight assembly, with spindle, to the Viscometer (Note the left-hand coupling threads).
Refer to the Helipath Stand Spindle Ranges sheet and select a T-bar spindle. Slide the spindle into the chuck and tighten. Lower the spindle into the fluid by depressing the disengaging lever on the Helipath Drive Unit. Recommended initial spindle location is achieved when the bottom of the T spindle is 1/4” above the surface of the test material. Push the reversing rod on the drive unit down. Make sure that the drive unit is OFF (the yellow light on the top of the drive unit will not be illuminated).
Turn the Viscometer motor on and allow for one to two revolutions of the spindle before turning on the Helipath Drive Unit which when switched on, will travel 7/8” per minute. Set the adjustable stops to accommodate the travel of the Helipath that will provide the desired penetration of the spindle (recommend 1/4” from the bottom of the test material). Turn on the Helipath Drive Unit (the yellow light will now be illuminated). NOTE: Brookfield does not recommend operating the Viscometer at RPMs greater than 12, when using the Helipath Stand Accessory.
Observe the dial reading or % torque display (on Digital Models). Record readings where necessary, keeping in mind that low rotational speeds may produce the best results. In this way, a figure will be obtained for the consistency at equal increments of drop through the material. Operation at low rotational speeds will usually produce optimum readings. Multiple readings should be taken as the T-bar travels through the helical cycle (approximately every 15-20 seconds).
Note: 1) It is recommended that the spindles be cleaned after each measurement.
2)The spindle can be placed anywhere in the sample material’s container prior to use, as long as rotation of the spindle is not impeded.
3)It is not recommended to use T-Bar spindles to check calibration of your Viscometer. Use the standard spindles which came with your Viscometer.
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