... the final programming time and frequency;7, using hard-clock circuit, low current consumption, spare batteries imported green disposable ... test instructions, hardware, meter status, meter communications state, the clock status, power orientation, school status, and the current time ... (Hz): 50, 604. Accuracy Class: Class 1, Class 25. Clock error: ≤ 0.5 sec / day (reference temperature); ≤ 1.0 sec / day ...