26 GMC-I Gossen-Metrawatt GmbH
18 Event Counting and Zero Crossings
18.1 Event Counting
The following can be measured and displayed:
• Number of events
An event is counted if the measurement value lies below
the lower threshold L-trig for at least 1 second, and sub-
sequently for at least 1 second above the upper thresh-
old H-trig. Voltage signals with a repetition frequency of
maximum 0.5 Hz are recorded (minimum period:
2seconds).
• Total time of all events
Time, during which the measured voltage was above the
upper threshold.
• Overall time since start of event counting.
➭ First enter the upper and lower thresholds as digits (see
examples in the table below, as well as chapter 21 “Set-
ting the Measurement Parameters”):
SEt ↵ triG ↵ EVENTS ↵
H.triG ↵ 01000 ↵
L.triG ↵ 00800 ↵.
➭ Set the rotary switch to V~ or V .
➭ Manually select the measuring range for “event” count-
ing.
➭ Apply the signal in the same fashion as for voltage mea-
surement.
➭ Repeatedly press the ESC|FUNC multifunction key until
EVENTS appears at the display. See table on next page
for further operating instructions.
Note!
☞
Automatic instrument shut-down is disabled in this
function.
Sample Entries for Trigger Thresholds
Value: trigger threshold H-trig or L-trig in digits
20000
1)
1) Values of up to 30000 digits (for H-trig) are reasonable for mea-
suring ranges from 300 mV to 300 V.
02000 00200
Measuring
Range
Effective Trigger Threshold
300 mV 200 mV 20 mV 2 mV
3 V 2 V 200 mV 20 mV
30 V 20 V 2 V 200 mV
300 V 200 V 20 V 2 V
1000 V
2)
2) Values of up to 10000 digits (for H-trig) are reasonable for the
1000 V measuring range, because a trigger threshold of 1000 V
results from this maximum value, which corresponds with the
measuring range upper limit.
200 V 20 V
To Next Page
Loading...
