Hioki 3290-10, Instruction Manual

Page: 87 / 152

4.6 Measuring Duty
81
1
2
3
4
5
6
7
8
9
10
M
easurement
P
ro
cedure
5.
Press the buttons to set the current threshold.
The current threshold is the value used for judging the operating state.
6.
Press
SHIFT
→
(
INPUT/SET
) to accept the setting.
Blinking
• Do not change the current range after setting the current
threshold. Changing the range causes the threshold to shift up
or down by a factor of 10. Select the appropriate current range
before setting the current threshold on page 80.
• For any digit, pressing the button when the value is zero
changes the polarity to negative. To change the setting to posi-
tive (0 A or more), press the button so that the "-" sign disap-
pears.
• In AC and AC+DC modes, setting are made with rms (positive
polarity).
• In DC mode, the setting may be positive or negative (for exam-
ple, when the threshold is set to ?20 A and ?10 A is measured,
the operating state is judged to be active (on), and ?30 A is
judged to be the non-operating (off) state.
• The current threshold cannot be set to 1 to 5 counts because
zero suppression (forcing counts of 5 or less to display as
zero) causes the current measurement value to display as 0 A
(the next setting after 0 is 6).
• To change the current threshold, see "Current Threshold Set-
ting" (page 80).
• Measurement of operating time works as shown below.
Non-Operating Time: A
0 A
Total Measurement Time: Z (=A+B+C)
Operating Time: A+C
Duty (percentage): (A+C) / Z Å~ 100
Measured Current Value
Threshold Setting: 2 A
Operating Time: C
Non-Operating Time: B
Total Measurement Time: Z