MicroTrap™ Operations Manual - Edition 4.4
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Total Tests:
The TOTAL TESTS button is pressed to display the total number of tests that the MicroTrap™ VOD/Data Recorder memory has been divided
into. The total number of tests can be set using the DAS™ Data Acquisition Suite Software. Please refer to DAS™ Data Acquisition Suite
Software Manual for instructions on programming the MicroTrap™ VOD/Data Recorder.
Remaining Tests:
The REMAINING TESTS button is pressed to display the number of programmed memory spaces that have yet to be filled with test data.
This number represents the difference between the total number of tests, and the number of tests already conducted and stored in the
MicroTrap™ VOD/Data Recorder’s memory.
Deleting Test Data:
The TOTAL TESTS and REMAINING TESTS buttons also have an advanced function. They can be used by the Operator to erase the data
recorded in the last test from the MicroTrap™ VOD/Data Recorders memory using hardware alone as opposed to using the DAS™ Data
Acquisition Suite, as detailed in DAS™ Data Acquisition Suite Software Manual.
• Do not turn OFF the MicroTrap™ VOD/Data Recorder after the test, the STATUS light and TRIG’D lights should be flashing.
• To erase the data from the last test; simultaneously press the TOTAL TESTS and REMAINING TESTS buttons and hold them until this
procedure is complete. The LED display will show ct. After about 2 seconds, the ct will begin blinking. After another 2 seconds, the ct
will disappear. Release the buttons. The data from the last test has been deleted.
• Turn OFF the MicroTrap™ VOD/Data Recorder. Turn ON the MicroTrap™ and press the TOTAL TESTS button and then the REMAINING
TESTS button. This will confirm that the remaining tests have been increased by 1 and that the last test in the MicroTrap™ VOD/Data
Recorders memory has been deleted.
Trigger Selection:
The TRIG EXT/INT switch selects internal (INT) or external (EXT) triggering of the MicroTrap™. Using the DAS™ Data Acquisition Suite
Software, the internal Trigger Level and Pre-Trigger memory allocation can be set. The External Trigger mode can be set using the
software by selecting either “BREAK circuit” or “MAKE circuit” external triggers. The position of this switch is captured in the settings
when the START button is pressed. After the START button is pressed, moving this switch will have no effect on the settings. Triggering is
described in detail in Chapter 4.8 and Chapter 4.9.
Next Test:
The NEXT TEST button is used to change the MicroTrap™ VOD/Data Recorders mode from Stand-by to Active. When in Active mode, the
MicroTrap™ VOD/Data Recorder waits for the User to press the START button.
Start Button:
When START is pressed, the MicroTrap™ VOD/Data Recorder enters Monitoring mode, which starts recording in the circular memory.
When the trigger criteria has been met, the MicroTrap™ VOD/Data Recorder will record the final loop of data, including the pre-set
pre-trigger amount dictated by the User when programming the MicroTrap™ VOD/Data Recorder. When the START button is pressed,
the START light illuminates. If the TRIG EXT/INT switch is set to EXT and the external trigger mode is set to “BREAK circuit” and nothing is
CAUTION
MREL recommends the above procedure for times in which the MicroTrap™ VOD/Data Recorder triggers prematurely
when the Operator is setting up the MicroTrap™ VOD/Data Recorder to record a VOD test. Premature triggering can
be caused by situations such as: loose connections in the signal wires; excessive moving of or driving over the signal
wires; or by the Operator inadvertently triggering the MicroTrap™ when using an external trigger wire.
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