M
AVTMMTO3xx Rev 3 Sept 2013
16
Indicator will flash quickly 3 time and pause three times
( L,O,L,O,L,O/O,O,O,O,O,O/L,O,L,O,L,O) ¼ sec cycle.
10. User should change the TAP.
11. If the current transition detection occurs, the unit goes into STATE 5 - (
5ms, 20ms, 40ms, 80ms) and the Remote Indicator will flash rapidly.
(L,O,L,O) ¼ sec interval continuously. The user can go back to the User
interface for repeat of test or can press the remote button, save the event
and start reading the resistance of the next tap.
12. If a 200 milli-seconds current transition detection has occurred,
Discharge State will be initiated. Remote Indicator will flash slowly until a
discharge has occurred. The Remote Indicator will slow flash (once per
second) (ON,OFF,ON,OFF) to indicate discharging.
13. Press to record the reading again and the process continues until all
transformer taps are tested.
FIRMWARE UPDATE MODE
The MTO3XX has an internal processor with associated firmware. From time to
time, Megger changes this firmware for operational improvements or added
features. This section describes the method for changing the firmware on an
MTO 300 and 330.
ATTAINING THE LATEST SOFTWARE:
The best way to attain the latest software is to visit Megger.com. Once you are on the
site:
Select the country you are located in.
You may have to register to log in on the site.
Select “Software Downloads”.
Select MTO. There should be a list of software available for download as
well as the detailed instructions for performing this task.
Select the latest firmware version available. The software is self contained as
a ZIP file.
Download the file and run.
A Megger Welcome Screen will appear on the PC display.
Before moving forward connect the PC to the MTO300 via an Ethernet
cable.
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