Table 2.1 (continued) 12 Description Value C is the unit of the smallest digit of display taking into account the position of the decimal point (rps, rpm, rph) Depending on the position of the decimal point, C is: • 1 (at dP = 0); • 0.1 (at dP = 1); • 0.01 (at dP = 2); • 0.001 (at dP = 3); • 0.0001 (at dP = 4) The limit of permissible absolute error of measurement of time intervals (s, min, h) ¼ 5 10 3 meas þ C where τmeas is the duration of the time interval measured by the device (s); C is the unit of the least discharge of the measuring range. Depending on the measuring range, C is equal to:
• 1 s (for range from 0 s to 99 h 59 min 59 s); • 1 min (for the range from 100 h 00 min to 9999 h 59 min); • 1 h (for the range from 10000 h 00 min to 9999 days 23 h) Weight, max. 0.5 kg Average service life 12 years Mean time between failures 75000 h