The Model 648 provides built-in protection against short circuit, open circuit, line loss, low line voltage, high line voltage, output over voltage, output over current, over temperature, and abrupt change of the external programming input. A proprietary circuit limits the power dissipated in the water-cooled cold plate should low resistance and high line conditions exist. The Model 648 protects itself if operated into resistances outside of nominal limits. By limiting current output, it will safely operate into a shorted load, and operate safely into high resistance loads by limiting voltage output. The Model 648 is also protected against power loss under full operation and nominal magnet load. Both low and high power line conditions are reported on the front panel display.
The Model 648 includes both parallel IEEE-488 and universal serial bus (USB) computer interfaces that provide access to operating data, stored parameters, and remote control of all front panel operating functions. The USB interface emulates an RS-232C serial port at a fixed 57,600 baud rate, but with the physical connections of a USB. This allows you to download firmware upgrades, ensuring your supply is using the most current firmware version with no need for any physical changes. The Model 648 also provides two analog monitors for output current and voltage.
Display and keypad
The Model 648 has a large screen displaying output current and output voltage readings simultaneously. Five front panel LEDs provide quick verification of instrument status, including ramping, compliance, fault, power limit, and computer interface mode. Error conditions are indicated on the main display along with an audible beeper. The most common functions of the power supply are accessed using a single button press.
3-year warranty and technical support
The Model 648 is supported by a 3-year standard warranty, our confirmation of quality and commitment for the long term. Our physicists understand your applications and measurements and provide support throughout your decision making process and beyond the sale.