How is the UUT forced onto the nails?
On pneumatic test fixtures, such as the CheckSum Analyst, Model TR-7, and TR-9 series, compressed air pressure and pressure/push rods are used to press the UUT onto the spring probes. On vacuum fixtures, such as CheckSum’s Model TR-3A, vacuum is used to pull the UUT down onto the probes. On mechanical test fixtures, such as CheckSum’s Model TR-5, the operator presses the UUT down onto the probes via the force of closing the top cover, with pressure/push rods, down on the UUT.
