Vanguard ATRT-03_03B S2 - Manual (Page 8)

ATRT-03 S2, ATRT-03A S2, AND ATRT-03B S2 USER’S MANUAL REV 2
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User Interface
The ATRT-03 S2 features a back-lit LCD screen (64 x 128 dot graphic) that is viewable in both
bright sunlight and low-light levels. The test results screen displays the transformer turns-ratio,
excitation current, phase angle, and percentage error. The unit is controlled via a rugged, 16-
key, membrane keypad and a digital rotary switch.
Transformer Test Plans
The ATRT-03 S2 can store up to 128 transformer test plans in its Flash EEPROM. A test plan is
comprised of the transformer nameplate voltages for each tap setting. The calculated turns-
ratio based on the nameplate voltages is compared with the measured turns-ratio. By recalling
a test plan, a transformer can be quickly tested and turns-ratio Pass/Fail reports can be
reviewed. Test plans can be created with the PC software and can be transferred to the ATRT-
03 S2 via the available interfaces (RS-232C port, USB port, USB Flash drive port).
Internal Test Record Storage
Up to 112 test records can be stored in the ATRT-03 S2’s Flash EEPROM memory. Each test
record may contain up to 33 turns-ratio, excitation current, phase angle and name plate voltage
readings. Test records can be recalled locally or transferred to a PC via the available interfaces
(RS-232C port, USB port, USB Flash drive port).
USB Flash Drive Interface
A built-in USB Flash drive interface provides a convenient method for transferring test plans
and test records to or from a USB Flash drive. The user can store up to 999 transformer test
plans on a USB Flash drive. Test plans can be transferred from a PC to a USB Flash drive, and
then a specific test plan on the USB Flash drive can be transferred to the ATRT-03 S2’s internal
Flash memory. Up to 999 test records from the field can be stored on a USB Flash drive. Test
records stored in the ATRT-03 S2’s internal memory can also be transferred to a USB Flash
drive. The supplied PC software can then be used to view the test records stored on the USB
Flash drive.
Computer Interface
In computer-controlled mode, the unit can be controlled via the RS-232C or USB port using the
supplied PC software (Transformer Turns-Ratio Analyzer application provided with each ATRT-
03 S2). This Windows® XP/Vista-based software can be used to run a test and to store test
results on a PC. Test results can also be exported to Microsoft® Excel.
Transformer Load Tap Changer Control
Transformer tap positions can be changed remotely using the unit’s built-in transformer load
tap changer. This remote-controlled tap changer feature eliminates the need to manually
change a transformer’s step-up and step-down taps.
Built-in Thermal Printer (ATRT-03 S2 and ATRT-03A S2 only)
The ATRT-03 S2 and ATRT-03A S2 feature a built-in 4.5-inch wide thermal printer that can print
test results. The printer and paper dispenser are mounted under the front panel for protection.