TTi QPX750SP – Bench/System DC Power Supply, Single output, 80V/50A, 750W PowerFlex+, LAN & USB interfaces, GPIB Option

• PowerFlex+ Regulation
• Single output
• 750W Power
• Interfaces: RS232/USB/LAN/GPIB
• Main Output(s): 80V or up to 50A

The QPX1200S is a 1.2kW single output dc power supply that offers users a level of flexibility that cannot be achieved with conventional laboratory power supplies. It is suited to be bench-top and system applications and is fitted with both front and rear terminals and an analog remote control interface.

The QPX1200SP adds a wide range of digital interfaces: USB, RS232 and LXI compliant LAN (Ethernet). * Note that the QPX1200L (now discontinued) is identical to the QPX1200SP.

The QPX1200S is a different type of laboratory power supply designed to meet the need for flexibility in the choice of voltage and current. A conventional PSU has a fixed current limit giving a power capability that reduces directly with the output voltage.

The TTi PowerFlex design of the QPX1200S enables higher currents to be generated at lower voltages within an overall power limit envelope. Each output can provide three times the current of a conventional PSU of the same maximum voltage and power (see power curve).

Example voltage/current combinations include 60V/20A, 48V/25A, 37.5V/30A, 26V/40A, and 20V/50A.

The PowerFlex regulator includes a linear output stage giving the QPX1200S exceptionally low output noise for a unit of this power, and ensuring good transient response.

The QPX1200S is housed in a 350mm (13¾”) wide case suitable for use on the bench-top. Output and remote sense terminals are mounted both on the front and on the rear panel along with the analog and logic interface connectors and, on the QPX1200SP, the bus interface connectors. The power supply is 3U high and a rack mounting kit (RM310 or RM310A) is available as an option.

Power Calculation

The meter for each output can be set to show the total power currently being provided to the load (V x A) to a resolution of 0.1 watts. The power is shown in addition to the voltage and current values.

Low Resistance Calculation

The meter for each output can be set to show the equivalent resistance of the load by displaying voltage divided by current.

Low resistance measurements using a DMM utilize a low excitation current and suffer from thermal emf errors and other low voltage effects. This function enables low resistance measurements to be made at high currents by using the remote sense terminals to create a four terminal connection.