MAN - BBR2S - REV: Original | C. System Overview
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the letters A (1 mm), B (3mm), C (5mm), and D (6mm). This provides the 6mm test range required by
both ASTM and AASHTO Specifications.
• Load Calibration Weights:
Four 50 gram and two 2 gram load cell calibration weights are supplied
with the BBR2S. These weights are placed on the load frame weight pan during load cell verification.
The weights are also used to calibrate the load cell and ensure system compliance.
Controls
• Internal Controls:
Two controls are located inside the right panel of the BBR2S base unit. These
controls are factory set (the line pressure regulator is positioned on the right inside of the panel. This
pressure is set at 60 psi. The bearing pressure regulator is located to the left of the line pressure
regulator and is set at 15 to 20 psi. Verify the settings if necessary.
• Base Unit Controls:
The BBR2S base unit controls can be seen in Figure C.1.
• Mechanical Refrigeration Unit:
The refrigeration unit’s power control is located on the front of the
unit. The temperature set-point is located on the temperature control on the front of the unit (see
manufacturer’s literature for set-up).
