Vanguard Tri-Phase - Manual (Page 44)

TRI-PHASE OPERATING™ INSTRUCTIONS
44
13.13 Previous Data In Buf. Menu
PREVIOUS DATA IN BUF.
1. APPEND PREV. DATA
2. CLEAR PREV. DATA
Figure 30.0 Previous Data In Buf Menu
a. Description: This menu is displayed when there is an existing test result in memory of the
same type of transformer which is under test.
The “Append Previous Data” feature allows the operator to stop the testing in order to
perform other duties. The operator will be able to continue testing the transformer at a later
time without having to repeat any of the previous tests. It is important to remember that this
may only be accomplished when all tests are performed on the same transformer. Figure
30.0 will display when another test is performed on an identical transformer configuration
and there is a test record residing in temporary memory (i.e., buf) from an identical
transformer configuration. The previous test record may be a restored test record or the
current test record for an identical transformer configuration.
For example, a previous single phase transformer configuration test record with one or
more test results from a single phase transformer configuration is stored in TRI-PHASE
™
FLASH memory. These test results are also still residing in temporary memory. The
operator performs another single phase transformer configuration test. The operator selects
“YES” in response to “Keep This Reading” at step 14 of Table 5.0 resulting in saving the
test results to temporary memory and the display of Figure 30.0.
Selecting menu option 1 (“Append Prev. Data”) will result in appending the current test
result to all of the previous test results from the test record stored in temporary memory;
assigning this new record to the next test record number in sequence.
Selecting menu option 2 (“Clear Prev. Data”) will result in clearing the temporary memory
of all previous test results from the test record except the current test result and assign the
current test result to the next sequential test record number.
b. Origin: This menu displays after the operator selects 1 (“YES”) from the “Keep This
Reading Menu” (Figure 29.0)
c. Action Options: Press key number 1 to append. Press key number 2 to clear the previous
test results from temporary memory and store the current test results in FLASH EEPROM.
d. Action To Perform: Selecting option 1 or 2. After the selection is made the status “TEST
SAVED” is displayed. Press any key or push down the Control Knob to advance to the
“Run Another Test Menu” (Figure 31.0).