MadgeTech PRTrans1000 User Manual

PrTrans1000 Trigger Settings

The PRTrans1000 is a data logger that measures and records transient pressure events. The
device constantly samples at 100Hz, but only records to memory, when the user specified trigger
settings have been reached.

A critical component of recording transient events pertains to how the start and stop trigger
point(s) are set. There are two different modes of triggers: Window

Window Mode

Window mode is very similar to using an oscilloscope – it starts on a trigger and takes a fixed
number of samples. For example, you could set it to trigger when the pressure exceeds 20psi and
take 2,048 samples. At the end of 2,048 samples, the trigger would re-set and be ready to take
another 2,048 samples should the logger detect another trigger event.

Window Mode Trigger Levels

In Window Mode, you must enable the High
Trigger and/or Low Trigger. A High Trigger
level will start an event when the pressure
exceeds the chosen level. A Low Trigger
level will start an event when the pressure
falls below the chosen level. After an event is
triggered, the data logger will take a
number of samples equal to the number set
in the Window Count. If you disable either
the High or Low Trigger levels (but not
both) the device will not trigger at all in the
disabled region.

Fig. 1

Consult Fig. 2 for a visual aide in understanding the relationship between the trigger points.
(Note: two sensor signals are displayed to show the high and low triggers only for illustration.)

If both trigger levels are set, the High cannot be below the Low level. There is also a software
determined minimum difference between the levels. The software will warn you if the levels are
too close.

Trigger Window count
data logger can execute.

Fill Memory on First Trigger
occurs.

will take the value you enter and round it up to the nearest valid value the

will fill the entire data logger memory when the first trigger event

and 2-Point.

Tech Note

MadgeTech, Inc.
879 Maple Street,
Contoocook, NH 03229

[phone] Phone
[phone] Fax
www.madgetech.com
[e-mail]

PRTrans1000 Trigger Settings REV A 2010.10.04 page 1 of 3

Tech Note

MadgeTech, Inc.
879 Maple Street,
Contoocook, NH 03229

[phone] Phone
[phone] Fax
www.madgetech.com
[e-mail]

Fig. 2 Window Mode

2-Point Mode

2-Point mode allows for start and stop trigger levels to be set for a High level and Low level. In
this mode, the number of samples taken is determined by the time the pressure spends above
the high levels or below the low levels.

In 2-Point Mode, you must enable the
High Trigger and/or Low Trigger. A
High Trigger level will start an event
when the pressure is greater or equal
to the Start High setpoint and stop
when it is equal to or less then the Stop
High setpoint. A Low Trigger level will
start an event when the pressure is less
or equal to the Start Low setpoint and
stop when it is equal to or greater than
the Stop Low setpoint. If you disable
either the High or Low Trigger levels
(but not both) the device will not
trigger at all in the disabled region.

Fig. 3

Consult Fig. 4 for a visual aide in understanding the relationship between the trigger points.
(Note: two sensor signals are displayed to show the high and low triggers only for illustration.)

PRTrans1000 Trigger Settings REV A 2010.10.04 page 2 of 3