HYDAC HMG 3000 - Manual (Page 45)

HMG 3000 Page 45
Edition 11/2007 - V02 R01-S02 Stock no.: 669712
Example of an Automatically Triggered
Measurement
The following occur in a hydraulic press from
time to time: defective components, ruptured
hoses or cracked cylinders. You suspect
there may be extremely high pressure
peaking in three hydraulic circuits and want
to monitor the press for pressure surges for
an extended period of time.
To do this, you make the following settings:
• Recording:
Measurement curve
with trigger
• Channels: A, B, C
• Sampling rate: 1 ms
• Recording time: 30 seconds
Trigger settings:
• Event 1: channel A increases to 180 bar
• Event 2: channel B increases to 230 bar
• Event 3: channel C increases to 280 bar
(These are pressures which are 50 bar
higher than may occur normally.)
• Pre/post trigger: 80 / 20%
(You select this option because you are
interested in knowing what happened in
the other pressure circuits before the
trigger was actuated and you want to
record the pressure curve somewhat
longer after the trigger event.)
• Automatic measurement: Activated
When actuating Start (+ OK) in the function
bar, in the next screen you are prompted for
a name and number for the measurement.
The measurement is then stored under this
name with a consecutive number after
every trigger event. You also have the
option of entering a comment, e.g. the
operating condition of the machine.