Vanguard VCBA ver.10.xx - Manual (Page 80)

REV 2 VCBA VERSION 10.xx SOFTWARE MANUAL
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6.4 Performing an OPEN-CLOSE-OPEN test
To perform an OPEN-CLOSE-OPEN test:
1. Make sure the VCBA software is running. Connect the CB analyzer to the PC via the RS-
232C port.
2. Put the CB analyzer in Computer Interface Mode. Please see section 3.2 for details.
3. Click on the File menu and select Time Breaker (alternatively you can click on the Time-
CB menu from the Main menu bar). The following window will be displayed:
4. From the “Type” radio box group, select “Open-Close-Open”.
5. From the “Timing Window” radio box group, select the desired timing window.
NOTE
• For the 1-second timing window, the timing resolution is ±100 micro-
seconds
• For the 10-second timing window, the timing resolution is ±1.0 milli-
seconds
• For the 20-second timing window, the timing resolution is ±2.0 milli-
seconds
6. From the “Insertion Resistor” radio box group, select the desired insertion resistance
value.
7. From the “Trigger Type” radio box group, select the trigger type.