Series PLZ-W Electronic Loads can be operated in constant resistance mode, constant current mode and switching action electronically, replacing the conventional sliding resistors (rheostats). Major features of the PLZ-W series are as follows: 1. Digital Meters. A digital voltmeter and an ammeter with an autorange o£ 3 1/2 digits. 2. A 10-Turn Multi-Dial. Current values and resistance values may be set very precisely with the 10 turn multi-dial having a lock mechanists. 3. Function of Presetting. Current and resistance values may be preset. 4. Built-in Oscillator for Switching Action. To be used in the constant current mode. Switching action occurs within the frequency range of 10 Hz - 1 kHz, 5. Display of Loading Power. Supplied power value is displayed in a digital figure and in the form of luminescent bar graph. 6. Remote Control Functions. When operated in the constant current mode the instrument may be remotely controlled by either an external voltage or an external resistance. The instrument may also be remotely controlled by an external resistance when operated in the constant resistance mode. Constant voltage mode: 5 - 60 V DC Constant Current Characteristics. Stability: 0.1% + 6 mA for loading voltage variation from 4 to 60 V 0.1% + 6 mA for line voltage variation by ±10% Ripple and noise: 5 mA RMS Temperature coefficient: 0.02%/°C (standard value) Rise/fall time: 100 ysec or less (when an internally installed oscillator is used). Constant Resistance Characteristics. Stability: ±10% loading voltage variation: (Stability) (Input Voltage (Setting resistance) Variation) 4 - 10 V 1 Ω 4 - 40 V 10 Ω Stability ±10% variation of line voltage: 0.1% + 6 mA Temperature coefficient: 0.03%/°C standard value (at the minimum resistance value of a range). Remote Control. Constant current: External resistance 0 - 1000 Ω External voltage 0 - 10 V DC Constant resistance: External resistance 0 - 1000 Ω Constant voltage: External voltage 0 - 10 V DC Protecting Functions. Overvoltage protection: Approx. 65 V DC Overcurrent protection: Approx. 65 A DC Overpower protection: Approx. 330 W Wrong polarity input protection: By use of a diode Overheating protection: 100°C ±5°C at cooling package Line input fuse rating: 1 A