: Extremely low, requiring less than 1 mL (
Perform calibration verification weekly or monthly using certified, NIST-traceable Brookfield silicone viscosity standards. Ensure the fluid standard matches the temperature profile of your typical test protocols. If the measured torque or viscosity value varies by more than ±1% of the full-scale range, recalculate the gap or contact a certified service center. Common Troubleshooting Steps Observation Potential Cause Corrective Action Sample drying out or skinning Reduce test time or use a sample cover. Torque Overload (>100%) Viscosity too high for selected cone/RPM Reduce the motor speed or switch to a higher-numbered cone. Temperature Fluctuation Blocked Peltier cooling fan vents Clear dust from rear vents; ensure 6 inches of clearance. Negative Viscosity Readings Incorrect or omitted Autozero step
The manual outlines a specific procedure for checking the instrument against a certified viscosity standard fluid. Here is the summarized protocol based on the official manual:
is a laboratory-standard, variable-speed cone and plate viscometer designed for precise, moderate-to-high shear rate fluid analysis. Unlike its fixed-speed counterpart, the CAP 1000+, the cap 2000 viscometer manual link
| Parameter | CAP 2000+ (Low Torque) | CAP 2000+ (High Torque) | |-----------|------------------------|-------------------------| | | 0.2 – 260 Poise (with spindles 01‑05) | 0.2 – 15,000 Poise (full range) | | Shear Rate | 10 – 13,000 s⁻¹ | 10 – 13,000 s⁻¹ | | Speed | 5 – 1000 rpm (995 increments) | 5 – 1000 rpm (995 increments) | | Temperature (L model) | 5 °C – 75 °C | 5 °C – 75 °C | | Temperature (H model) | 50 °C – 235 °C | 50 °C – 235 °C | | Sample Volume | < 1 mL typically | < 1 mL typically | | Industry Standards | ASTM D4287, ISO 2884, BS 3900, GB9751 | Same |
Inconsistent readings can be caused by several factors such as not controlling for non-Newtonian fluid behavior, shear heating at high speeds, or needing a calibration verification.
Essential steps to perform a calibration check using viscosity standards to ensure accuracy. : Extremely low, requiring less than 1 mL
: Align the flat on the spindle with the thumb screw and tighten securely. If using a solvent trap , slide it up and lock it clockwise.
The CAP 2000 viscometer sat quietly on a polished lab bench, its stainless-steel body reflecting the steady glow of the overhead lamp. For years it had measured the flow of countless formulations — inks, oils, adhesives — translating subtle resistance into reliable numbers. Today, Dr. Meera Patel prepared a new polymer blend that would determine whether their prototype sealant met industry specs.
Can be caused by improper cleaning or a, malfunctioning temperature controller. Record the stable viscosity reading
: Measurement boundaries spanning 0.2 to 15,000 Poise.
Record the stable viscosity reading, torque percentage, and shear rate displayed on the digital screen. 🔧 Maintenance, Cleaning, and Troubleshooting Routine Cleaning
Contact AMETEK Brookfield directly:
Enables PC control for automated, complex rheological data analysis. Operating Procedures and Guidelines