DC-DC power supply http://www.kayandz.com/product/25636.html: 1, CV (constant voltage) Work: Source effect: 0.2% + 20mV load effect: 0.2% + 20mV offset voltage cycle and Random (PARD): 0.3% + 30mV (rms) 2, when the operating voltage CV drift 1X10-3 + 10mV / 7 小时 (20 ± 20C) 3, CV can use the remote control (with an external sampling function) * 4, potentiometer Remote control the output voltage, the master resistance 0 to 4.7 kilohms, charged voltage 0 ~ 600V * 5, the output voltage can be voltage remote control, master voltage from 0 to 5 volts, charged voltage 0 ~ 600V * 6, may be potential remote control device output current master resistance 0 to 4.7 kilohms, charged current 0 ~ 5A * 7, can remote control the voltage output current master voltage from 0 to 5 volts, charged current 0 ~ 5A * 8, too voltage protection voltage from 0 to rating and + 2V adjustable, when overvoltage output, the output power is automatically turned off and the police locked. 9 meter accuracy: 1% ± 2 words. 10, warm-up time: 15 minutes, but the measured drift of one hour. 11, using the environment: according to national standards GB6587-86 "master environmental testing electronic measuring instruments" in Table 1 Group II requirements. 12, 8 hours continuous operation at full load (under 40 ℃ environment of long-term use). 13, 220-volt power supply voltage ± 10% 14, 50 ± 10 Hz power frequency