英國TTi PL303QMD/PL303QMT雙輸出線性直流電源

 新的PL系列高性能線性直流穩壓電源，它取代了原來的PL系列已在世界各地的許多組織選擇的實驗室電源。新的PL系列保留原來的PL系列真實的模擬控制，但將其與新的數字為基礎的方便的功能，更高的功率密度，和優越的性能。

PL303QMD不僅僅是兩個PL303單組蔬菜電源，它有四種操作模式：

• 兩組完全隔離，獨立輸出
• 兩組保持隔離輸出，但主輸出電壓控制輸出相同的電壓
• 并聯輸出的功率可以達到180W，電流可以提供高達6A

• 分離率跟蹤：如上所述，但是從電壓可設置為任何比例的主電壓將保留百分比作為主電壓的變化。

兩個輸出的同步控制

兩/關閉按鈕，除了個別的開關為每個輸出，并讓兩個輸出被打開或關閉，同時通過按下一個按鈕。

輸出的同步開關的電路可如果一個電壓軌是目前沒有其他受損的重要性日益增加。

PL303QMT 是三組輸出線性直流電源，PL303QMT具有相同功能的PL303QMD，但有一個完整的性能第三的輸出一個低電壓，高電流能力。

第三組輸出可以提供0-6V分辨率為1mV，電流8A。所有的主要輸出功能納入，包括S -鎖，可選遙感，和一個0.1分辨率低電流范圍。

產品型號：

• PL068 - 0V to 6V/1mA to 8A; 0V to 6V/0.1mA to 500mA; (48W max.)
• PL155 - 0V to 15V/1mA to 5A; 0V to 15V/0.1mA to 500mA; (75W max.)
• PL303 - 0V to 30V/1mA to 3A; 0V to 30V/0.1mA to 500mA; (90W max.)
• PL601 - 0V to 60V/1mA to 15A; 0V to 60V/0.1mA to 500mA; (90W max.)
• PL303QMD - two identical outputs as per PL303, with Tracking and Parallel modes (see Modes section)
• PL303QMT - as per PL303QMD plus third output as per PL068 (above)

• Note: Actual maxima for voltage and current are typically 1% greater than the figures given above.

  Output Setting & Control

  Voltage Setting: By coarse and fine controls.

  Current Setting: By single logarithmic control.

  Output Mode: Constant voltage or constant current with automatic cross-over. CC indicator in constant current mode.

  Output Switch: Electronic, non isolating. Preset voltage and current limit displayed when Output off.
  Output rise time no load <15ms.

  V-Span (Voltage Span Control)

  The voltage adjustment range can be controlled by digital setting of the end-stop values of the coarse voltage control to any desired values. The range for Vmax is 0.1V to 6V/15V/30V/60V depending on model.
  The range for Vmin is 0 to (Vmax - 0.1V).

  S-Lock (Settings Lock)

  Voltage and current settings can be locked by a single button press. Lock accuracy is equal to the meter accuracy (see Meter Specification).

  Output Performance

  Ripple and Noise: Normal mode voltage: <0.4mV rms and 2mV p-p; Normal mode current: <0.2mArms; (<40uA on 500mA range); Common mode current: <5mA rms

  Load Regulation: Voltage - <0.01% + 2mV. Current - typically 0.01% + 500uA.

  Voltage specification applies for any load change, measured at the output terminals. When using remote sense add 0.5mV per 0.1V drop in the positive output lead (max. sense lead resistance 0.5 Ohm).

  Line Regulation: Voltage <0.01% + 2mV for 10% line change. Current <0.01% + 250uA. for 10% line change.

  Transient Response: <50ms to within 50mV of setting for a 90% load change.

  Temp. Coefficient: Voltage: typically <(50ppm + 0.5mV)/oC; Current: typically <(100ppm + 1mA)/oC;
  (100ppm + 0.1mA)/oC on 500mA range.

  Output Protection

  Output Protection: Output will withstand forward voltages of up to 20V above rated output voltage. Reverse protection by diode clamp for currents up to 3A.

  Over-temperature: Output trips off for over-temperature.

  Safety Interlocks: Operations that could cause an unpredictable change in voltage or current settings are interlocked with the output switch.

  Output Connections

  Output Terminals: Universal 4mm safety binding posts on 19mm (075) spacing.
  Terminals can accept fixed shroud 4mm plugs, standard 4mm plugs, fork terminals and bare wires.

  Remote Sense

  Sense Selection: Voltage sensing can be selected as Local or Remote by front panel switch.

  Sense Terminals: Sprung loaded screw-less terminals.

  MODES OF OPERATION (PL303QMD/QMT only)

  The PL303QMD and PL303QMT have four modes of operation - Independent, Isolated Tracking, Isolated Ratio Tracking, and True Parallel.

  Independent: The two outputs are completely independent and electrically isolated from each other.

  Tracking: The two outputs remain electrically isolated, but the voltage control of the Master output sets an identical voltage on the Slave output.

  Ratio Tracking: As Tracking, but the Slave voltage can be set to to any percentage of the Master output and will retain that percentage ratio as the Master voltage is varied.

  Parallel: All of the power (up to 180 watts) is channelled to the Master output which can consequently supply up to 6 amps. The Slave output is turned off and its meters are blanked.

  Both On/Both Off: The Both On and Both Off buttons are in addition to the individual switches for each output, and allow both outputs to be turned on or off synchronously by a single button press.

  METER SPECIFICATIONS

  Display Type: Dual 4-digit meters, 10mm (039) LED.

  Voltage Meter

  Resolution: 10mV; Accuracy: +/-(0.1% of reading + 10mV)

  Current Meter

  Resolution: 1mA (0.1mA on 500mA range); Accuracy: +/-(0.3% + 0.005A) to 3A; +/-(05% + 0.005A) to 5A;
  +/-(03% + 0.5mA) on 500mA range

  Meter Damping: Normally 20ms, switchable to 2 sec for averaging of rapidly varying loads.

  GENERAL

  AC Input: 230V AC or 115V AC +/-10%, 50/60Hz. Installation Category II; Input Power: 280/560/840VA max.

  Operating Range: +5oC to +40oC, 20% to 80% RH

  Storage Range: -40oC to + 70oC

  Environmental: Indoor use at altitudes up to 2000m, Pollution Degree 2.

  Cooling: Intelligent variable-speed low noise fan assists convection.

  Safety: Complies with EN61010-1

  EMC: Complies with EN61326

  Size: Single - 107mm wide x 131mm high ( rack 3U) x 288mm deep, excluding feet, knobs and terminals;
  Dual - 214mm wide x 131mm high ( rack 3U) x 288mm deep, excluding feet, knobs and terminals.
  Triple - 321mm wide x 131mm high ( rack 3U) x 288mm deep, excluding feet, knobs and terminals.

  Weight: Single - 45kg; Dual - 8.5kg, Triple 12.8kg