12
the set range voltage. In the event of a terminal voltage of
≥
50
V a voltage and warning will be displayed.
Do not disconnect instrument leads or clamps until the
LED and display warnings are switched off indicating that
the unit under test is discharged! Significant current can
be stored in reactive loads which act as capacitors or
inductors, which can be lethal.
The display shows the final resistance result, capacitance, test
current and Time Constant (TC) in addition to test duration.
On MIT525, MIT1025, and MIT1525 models the result can be
saved by pressing the dedicated save (
) button after a
resistance or voltage test is complete. The save button will
appear momentarily to confirm the data is saved. If a full test
curve is required the user must select logging by pressing the
save button
before
starting the test. Data will be logged every
5 seconds for the duration of a resistance test. It is not
possible to log voltages in voltmeter mode.
If temperature entry has been activated a prompt will appear
for the user to enter a temperature reading after IR and IR(t)
insulation tests. DAR, PI, SV, ramp and DD tests will not
prompt for temperature input.
Display backlight is activated by pressing the (
J
J
J
J
) button. The
backlight button can be pressed a second time to deactivate
the backlight. Automatic deactivation will occur after a preset
timeout period if not deactivated manually.
Memory functions and downloading
Models MIT525, MIT1025 and MIT1525 have advanced
storage, recall and download functions to facilitate
documentation of insulation tests.
Recall results
Setting the central rotary switch to
‘open folder’ position enables the
user to recall saved results
beginning with the most recent
result. Up and down arrow buttons
enable the user to scroll through
results based on a sequential four
digit index. Left and right arrow buttons scroll through a single
result showing all saved test data including time/date. Where
logging has been enabled, only the final result is displayed on
screen. The full result can be viewed by downloading to
PowerDB/PowerDB Lite.
In saved results, the test mode is identified by the icon or
abbreviation of each test on the display. In addition, the open
folder icon is displayed to indicate recall memory mode.
Download results
PowerDB Pro, Advanced and Lite are
Megger’s asset and data management
software packages with integrated
forms for MIT525, MIT1025, MIT1525
instruments.
The default download on the
instrument is a single test log or
summary result. To download all results press an arrow
button.
Detailed instructions on how to interface with PowerDB are
available on the product CD on a document entitled
‘Interfacing MIT525, MIT1025 and MIT1525 to PowerDB’.
PowerDB offers instructions specific to MIT525, MIT1025,
MIT1525 regarding the download procedure. When results are
downloaded the IRT can be disconnected from the PC after
the application releases the port.
