According to its function, it could be used in metrology verification department, product quality inspection organization and producing company of clock and smart electric energy meter.

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 method used by the 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 via the counting method to calculate the daily difference. Additionally it can measure the electronic devices with a built-in 32768Hz crystal oscillator, and directly measure the clock error of smart energy meter which output 1Hz, even measure the frequency of pulses and the time interval between two pulses.

Yes, a calibration certificate issued by the third-party metrology institute can be supplied but it’s chargeable. Please check the cost with salesman when you place an order.

SF2002 stopwatch calibrator could also be called stopwatch verification device or time calibrator and is designed in accordance with the requirements 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 device under test can get the reference measurement value, so as to get the measuring error of the detected instrument and achieve the purpose of verification.