Chapter II
Portable digital multimeter
35
5.11. Duty cycle: %+, %-
θ
T
θ
T
% - =
θ
T
x 100
% + =
θ
T
x 10 0
Resolution : 0.01%
Minimum duration for
θ
or T -
θ
: 2 µs
Maximum duration for T : 0.8 s
Minimum duration for T : 100 µs
Absolute error as a % :
310
4
.
−
T
Sensitivity : Refer to sensitivity in frequency measurement mode
Absolute additional error on
θ
, due to the zero crossing slope : 0.1 x
C
P
with C : V or A range (C : 5000V for 1000V
DC
or 750V
AC
ranges and C: 50A for 10A range)
with P : slope in V/s or in A/s
5.12. Positive
( ) or negative (
) pulse count
Minimum pulse duration : 2 µs
Count up to 99999
Limit of triggering : 3% of range except in 750 V
AC
-1 000 V
DC
range (limit : 150 V) and 10 A
(limit : 1.5A). This limit is positive in ( ) and negative in (
).
Reset the count to zero with the REL key.
5.13. Positive
( ) or negative (
) pulse width
Resolution :
10 µs
Minimum pulse width :
20 µs
Accuracy :
0.01 % ± 10 µs
Maximum duration of a period :
12.5 s
Limit of triggering : 3 % of range except in 750 V
AC
-1 000 V
DC
range (limit : 150 V) and 10 A
(limit : 1.5A). This limit is positive in ( ) and negative in (
).
Additional error on measurement due to the zero crossing slope : refer to duty cycle
measurement.
