Brookfield DV-E Viscometer Manual de usuario descargar pdf (Pagina 15)

Brookeld Engineering Labs., Inc. Page 15 Manual No. M98-350-J0912

II.4 Autorange and CGS or SI Units Selection

The

AUTO RANGE key allows you to determine the maximum calculated viscosity (full scale

reading) possible with the current spindle/speed setting. Pressing the key at any time will cause

the current viscosity display to change and show that maximum viscosity. The screen torque display

will now display “%100” to indicate this special condition. This maximum viscosity and %100

value will be displayed for as long as the

AUTO RANGE key is depressed. Figure II-7 shows the

AUTO RANGE function for the situation where the No. 2 RV spindle is rotating at 10 RPM. The

full scale range is 4000 cP (or 4000 mPa

s).

cP 4000

10RPM %100 S02

Figure II-7

Pressing and holding the AUTO RANGE key during power on will enable the viscosity unit

displayed to toggle between CGS (cP) and SI (mPa•s) units. To change the unit format:

1. Turn the power off.

2. Press and hold the AUTO RANGE key and turn the power ON.

The DV-E will retain the unit selection when the viscometer is turned OFF.

CGS SI

Viscosity: cP mPa

1 cP = 1 mPa•s

II.5 Out of Range

The DV-E gives indications for out of specication or out-of-range operation. When % (Torque)

readings exceed 100.0 % (over-range), the display changes to that shown in Figure II-8. You must

either reduce the speed or use a smaller size spindle to correct this condition.

cP EEEE

10RPM %EEEE S02

Figure II-8

If you operate at spindle speeds that produce % (Torque) below 10.0 % (under-range), the DV-E

displays both % (Torque) and cP (Viscosity) with ashing unit designations, as shown is Figure

II-9. You must either increase speed or use a larger size spindle to correct this condition.

The parameters of % (Torque) and cP (Viscosity) will also ash prior to one complete spindle

revolution. It is not recommended that readings are taken while parameters are ashing.

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