====== SR560 Voltage Preamplifier ====== The manual for this instrument is available on the Stanford Research website. Our SR560 was last sent in for a factory calibration and new battery in August 2026. ===== Tips ===== When changing the cables connected to A and/or B input, set the coupling to ground. This will protect the amplifier from unintentional voltages while you are making changes to the cabling.