Press [Enter] to select, whether the recording shall be started, if the trigger
value is fallen below („lower“) or exceeded („greater“).
[
▼
] [
▲
] Highlight „Trig. value“ [Enter].
Enter the value where the recording shall be started, e.g. [ 2 ] [ 0 ] [ 0 ] [Enter].
[
▼
] [
▲
] Highlight „Pretrigger“ [Enter].
Enter the desired pretrigger value (see below), e.g. [ 2 ] [ 0 ] [Enter].
Press [ C ].
In the shown example, the recording will be started, when the measured value „p1“ falls
below the value „200“. A pretrigger of 20 % will be recorded.
Pretrigger
The pretrigger allows to record values received BEFORE the defi ned trigger incident.
The pretrigger is a percentage of the recording time. If the recording time is set to „1 min.“
and the pretrigger is „20 %“, the series of measurements starts 12 seconds (20 % of 1
minute) before the trigger incident and is then continued for 48 seconds (12 + 48 sec. = 1
minute recording time).
If the pretrigger buffer could not be fi lled completely before the measurement starts, the
recording time will be shortened. For instance if the trigger incident comes in this example
fi ve seconds after activating the recording, only these fi ve seconds will be recorded as
pretrigger and then the rest of the defi ned recording time (48 sec). The recording time is
reduced to 5 + 48 = 53 seconds.
Key as trigger
This function allows to start the defi ned recording during the measuring by pressing a key.
Select „Key“ as trigger, set the desired pretrigger and then leave the operation menus.
8.2
Record Measured Values
To initiate the recording of measured values, you will fi rst have to start the recording. Then
it either begins immediately, or after the trigger incident has happened.
9.
10.
11.
12.
13.
14.
MultiHandy 3020
Operating Instructions
Operating Instructions MultiHandy 3020 • © Hydrotechnik GmbH • All rights reserved
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