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connected to the EXT TRIG BNC, the MicroTrap™ VOD/Data Recorder will trigger immediately when START is pressed. This is a common
error for first time users. If the OUT OF RANGE Low or High lights are illuminated, the START button will not allow the test to start (and the
START light to illuminate).
Stop Button:
The STOP button is particularly useful when the MicroTrap™ VOD/Data Recorder has been set at a very slow sampling rate using
DAS™ Data Acquisition Suite Software. An example of this would be using a thermocouple sensor in a long-duration experiment with a
MicroTrap™ VOD/Data Recorder that has had the MicroTrap™ VOD/Data Recorder Scope Upgrade installed. Given the large memory
in the MicroTrap™ VOD/Data Recorder, if the lowest sampling rate (1 Hz) is selected, a total recording time of 4 million data points / 1
Hz = 4,000,000 seconds (46 days) will be available for recording. After the User is satisfied that the pertinent data has been recorded,
pressing the STOP button marks the remaining data as unused, and the MicroTrap™ VOD/Data Recorder will then revert back to Stand-by
mode. This saves the User from having to wait for the MicroTrap™ VOD/Data Recorder to finish the test automatically. If the MicroTrap™
VOD/Data Recorder did not trigger, the User can press the STOP button to allow the diagnostic of the saved file for the possible reason
that the unit did not trigger. When the file is opened, choose “Hide uninitialized memory” to not display the data that was not captured.
Erasing All Tests:
The STOP button also has an advanced function. It can be used as part of a sequence to manually erase all of the data in the
MicroTrap™ VOD/Data Recorders memory in the absence of a PC. This can be performed in the following steps:
1. Turn ON the MicroTrap™ VOD/Data Recorder.
2. Press the NEXT TEST button to put the MicroTrap™ VOD/Data Recorder in Active mode. The STATUS light should be on.
3. Simultaneously press the NEXT TEST and STOP buttons and hold them down. The LED will display a blinking dE. Release the buttons.
4. Simultaneously press the START and STOP buttons and hold them down. The LED will display dE without blinking. Release the
buttons. All of the data in the MicroTrap™ VOD/Data Recorders memory will be deleted.
5. Turn OFF the MicroTrap™. Wait 5 seconds. Turn ON the MicroTrap™ VOD/Data Recorder then press the TOTAL TESTS button and then
the REMAINING TESTS button to confirm that these numbers are equal and that all of the test data in the MicroTrap™
VOD/Data Recorders memory has been deleted.
MICROTRAP USB COM:
The MICROTRAP USB COM port is used to connect the Communications Cable to the MicroTrap™ VOD/Data Recorder. The other end
of the Communications Cable is connected to the USB Port of the computer, for programming the internal Recording Parameters of the
MicroTrap™ VOD/Data Recorder and for retrieval of the recorded data (Section 5.1). See the DAS™ Data Acquisition Suite Software
Manual for performing this task.
Out of Range Lights:
There are two OUT OF RANGE warning lights. They will flash when the probe resistance is out of range as discussed in Chapter 4.7.
CAUTION
MREL recommends the above procedure for times in which the Operator is already in the
field and has forgotten to Clear All Tests using the MREL DAS™ Data Acquisition Suite.
CAUTION
The unit must be powered on for at least 5 seconds prior to connecting the USB cable. If this is not followed, an
unrecoverable error can occur and the unit may be required to be sent in for service.
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