![ATS BBR3 Instruction Manual Download Page 17](http://html1.mh-extra.com/html/ats/bbr3/bbr3_instruction-manual_3005234017.webp)
12
MAN - BBR3 - REV: Original | C. System Overview
Linear Variable Differential Transformer (LVDT)
The LVDT is calibrated at between 0 and 6 mm and is mounted in the upper section of the load frame assembly. A
free-floating core rod is attached directly to the load shaft. It measures the displacement of the specimen as the test
load is applied.
Load Cell
The load cell is a precision strain gauge-type, with 500 gram (4903 mN) force capacity. It is constructed of stainless
steel to prevent corrosion or damage by the fluid during test procedures.
CAUTION: The load cell can be easily damaged, especially from side loading and excessive torque.
Use caution while handling the test frame when the loading shaft is attached. Remove loading shaft
before laying load frame on its side, especially before shipping.
Resistance Temperature Detector (RTD)
The RTD is a platinum measuring device that measures the cooling fluid bath temperature, is attached to the chiller,
and relays the information to the computer control system software. It is mounted in the BBR3 bath directly under the
test specimen supports.
Computer Control System Software
The computer control system software provides user control of the BBR3 system in a Windows® environment with
touchscreen access. The software provides pull- down menus, button selections, and data entry text boxes for easy
updates and access to information.
The base unit contains an integrated personal computer, designed to efficiently run the software. During operation,
the software collects and records the data from the various sensors on the load frame. During tests, the software
controls specimen loading and unloading. The software is organized so all the information required to conduct a
particular test is stored internally.
Mechanical Refrigeration Unit (Chiller)
The refrigeration unit (chiller) is an immersion cooler designed to act as a cooling source for sub ambient work in
liquid baths. It maintains the cooling fluid at a constant temperature using the unit’s temperature controller and the
magnetic stirrer located in the bath. The single stage refrigeration system is equipped with one compressor. A hose
carries refrigerant through the cooling probe located in the bath.
Refer to the separate manufacturer’s literature for more detailed information regarding safety, operation, and
maintenance of the refrigeration unit.
WARNING: Refrigeration unit (chiller) will cause the test bath to be extremely cold. Do not submerge
hand or arm in extremely cold test bath. Do not attempt to pull the drain plug when the test bath level
is high and the temperature is extremely cold. Extremely cold fluid may cause frostbite.