The OVP function realized through hardware, which is independent comparing with software control, thus making it can provide more comprehensive and stable protection.
SF2002 stopwatch calibrator could also be called stopwatch verification device or time calibrator and designed as requirement of JJG237-2010 stopwatch verification regulation, it could be used to verify mechanical stopwatch and electronic stopwatch, pointer electrical stopwatch, digital electrical stopwatch, etc. By measuring the standard time interval signal, the measured device can get the actual measurement value of standard time interval signal, so as to get the measuring error of the detected instrument and achieve the purpose of verification.
Yes, the calibration certificate issued by the third metrology institute could be supplied but it’s chargeable. Please check cost with salesman when you place order.
The SF2004 daily difference calibrator is a multi-functional calibrator developed according to ‘verification regulation of JJG 488-2018 instantaneous diurnal difference meter’. The measurement way that SF2004 used is to transform the oscillating signal from the Clock to the corresponding electrical signal by using the magnetic-electro converting type sensor, then measure the difference between the period of electrical signal and the nominal value by counting method to calculate the daily difference. Additionally it can also measure the electric product which is built-in 32768Hz crystal oscillator, and directly measure the clock error of smart energy meter which output 1Hz, even the measure the frequency of Pulse and the time interval of two Pulses.