Digital pressure meter is a micro-processor controlled, accurate and versatile digital pressure measuring and calibration instrument with integrated fast peak-, max. -and min. – function. The instrument is used in two modes: MANO Mode: The pressure is measured twice per second and displayed. The top display indicates the actual pressure, the bottom display shows the MAX, - or MIN.- pressure since the last RESET. PEAK Mode: The pressure is measured 5,000 times per second and is brought to the display twice per second. A ZERO function allows the user to set any value as a new zero reference. Barometric pressure variations can thus be compensated. The digital pressure meter is supplied with an internal battery with 1,000 hours continuous operation in MANO-Mode, guaranteed by the AUTO SWITCH-OFF function, which activates if no key inputs are detected within the previous 15 minutes. Supplied with all relevant certificates.