AMETEK Brookeld Page 40 Manual No. M15-356-B0916
Calibration Check Procedure for a Helipath Stand and T-Bar Spindles
T-Bar spindles should not be used for verifying calibration of the DVE Viscometer.
When a Helipath Stand and T-Bar spindles are used:
Remove the T-bar spindle and select a standard LV (#61-63) or RV,HA,HB (#1-6) spindle.
Follow the procedures in the beginning of this section, entitled Calibration Procedure for
LV (#61-63) and RV, HA, HB (#1-6) Brookeld spindles.
Calibration Check Procedure for Spiral Adapter
1) Place the viscosity standard uid (in the proper container) into the water bath.
2) Attach the spindle to the viscometer. Attach chamber (SA-1Y) and clamp to the viscometer.
3) Lower the DVE into measurement position. Operate the viscometer at 50 or 60 RPM until
the chamber is fully ooded.
4) e viscosity standard uid, together with the spindle, should be immersed in the bath.
Don’t introduce air bubbles.
Stirring the uid periodically (operate at 50 or 60 RPM), prior to taking measurements to
encourage temperature equilibrium.
NOTE: e spindle must rotate at least ve (5) times before readings are taken.
5) Measure viscosity and record the viscometer reading; include % and cP (mPa•s). Instrument
accuracy is ± 2% of the maximum viscosity range and not the standard 1%.
Interpretation of Calibration Test Results:
When verifying the calibration of the DVE, the instrument and viscosity standard uid error must
be combined to calculate the total allowable error.
e DVE is accurate to (+/-) 1% of any full scale spindle/speed viscosity range.
Brookeld Viscosity Standard Fluids are accurate to (+/-) 1% of their stated value.
Calculate the acceptable range of viscosity using DVERV with RV-3
Spindle at 2 RPM; Brookeld AMETEK Standard Fluid 12,500 with a
viscosity of 12,257 cP at 25°C:
1) Determine full scale viscosity range using the RANGE key on your instrument or calculate
with equation:
Full Scale Viscosity Range [cP] = TK
*
SMC
*
10,000
RPM
Example 1:
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