Brookfield DV-E Viscometer Instrukcja Użytkownika Pobierz pdf (Strona 25)

Brookeld Engineering Labs., Inc. Page 25 Manual No. M98-350-J0912

Normal 25°C Standard Fluids

Viscosity (cP) Viscosity (cP)

High Temperature Standard Fluids for use

with Thermosel Accessory

100

500

1000

5,000

12,500

30,000

60,000

100,000

HT-30,000

HT-60,000

HT-100,000

Calibrated at three viscosity/temperatures

25°C, 93.3°C, 149°C

Refer to the Brookeld Catalog for more information.

Table D-1(Silicone Oils)

Brookeld Viscosity Standard Fluid - General Information

We recommend that Brookeld Viscosity Standard Fluids be replaced on an annual basis, one year

from date of initial use. These uids are pure silicone and are not subject to change over time.

However, exposure to outside contaminants through normal use requires replacement on an annual

basis. Contamination may occur by the introduction of solvent, standard of different viscosity or

other foreign material.

Viscosity Standard Fluids may be stored under normal laboratory conditions. Disposal should be

in accordance with state, local and federal regulations as specied on the material safety data sheet.

Brookeld Engineering Laboratories does not recertify Viscosity Standard Fluids. We will issue

duplicate copies of the Certicate of Calibration for any uid within two years of the purchase date.

Brookeld Viscosity Standard Fluids are reusable provided they are not contaminated. Normal

practice for usage in a 600 ml beaker is to return the material from the beaker back into the bottle.

When using smaller volumes in accessories such as Small Sample Adapter, UL Adapter, Thermosel

or Spiral Adapter, the uid is normally discarded.

Calibration Procedure for LV #1-3 (#61-63) and RV, HA, HB (#2-6) Brookeld spindles:

Note: The LV #4 (#64) and RV, HA, HB #7 have been omitted from this proce-

dure. Brookeld does not recommend the use of these spindles to perform a

calibration check on your instrument. Reasons pertain to the small amount

of sample surface area that makes contact with the viscosity standard, the

difculty of establishing the immersion mark precisely and the need for

precise temperature control at 25°C in the immediate vicinity of the spindle.

Follow these steps using one of the recommended spindles to verfy calibration on you instrument:

1) Place the viscosity standard uid (in the proper container) into the water bath.

2) Lower the DV-E into measurement position (with guard leg if LV or RV series viscometer

is used).

3) Attach the spindle to the viscometer. If you are using a disk shaped spindle, avoid trapping

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