Features
n
Continuous resistance or current measurement on main display.
n
Optional resistance, current, or figure of merit measurements on
secondary display.
n
Standard test voltages – 250 V, 500 V, 1 kV, 2.5 kV, 5 kV
n
Non-standard test voltages – selectable between 50 V and 1 kV in 10
V
steps, and selectable between 1 kV and 5 kV in 25
V steps.
n
Test modes include insulation resistance, polarisation index, step
voltage and dielectric discharge.
n
The dielectric absorption ratio is automatically calculated if the
corresponding timers are set.
n
Either burn or breakdown selectable in insulation resistance mode.
n
Insulation ‘Alarm Limit’ available in insulation resistance mode.
n
Programmable timers include a main test duration timer, plus T1 and
T2 timers for time resistance method type tests.
n
Load capacitance and time constant measurements – displayed at end
of test.
n
LCD backlight.
n
Data storage, data retrieval and real time data output.
n
USB or RS232 communications.
n
Battery level / charge level indicator.
INTRODUCTION
4
General Description
The S1-552/2 is a microprocessor controlled 5 kV insulation tester
offering measurement capability of up to 15 T
Ω
. The instrument
performs automatic tests and has data storage and data retrieval facilities.
Polarization index and dielectric discharge tests are performed
automatically, and test duration and voltages can be adjusted according
to user preference for these tests. A step voltage test can be performed
automatically, with a default voltage of 1 kV, and test duration of 5
minutes. It is possible for the user to set different voltages and test
durations for the step voltage test.
The S1-552/2 can be powered from the mains supply or by its own
internal rechargeable battery, which provides for at least 6 hours of
continuous testing with a 100 M
Ω
load. A battery level indicator on
the LCD display indicates battery capacity. Connecting power to the
mains supply connector will automatically charge the battery whether
the instrument is switched ‘on’ or ‘off’, except during testing. A high
level of internal isolation allows the instrument to be used while the
unit is supplied from the mains. An internal battery management system
switches the instrument off after ten minutes of inactivity. If the battery
approaches a very low state of charge the instrument turns itself off, and
mains power must be applied before the instrument can be used again.
Recorded test results and settings will not be lost when the instrument is
switched off.
A comprehensive LCD display shows resistance, current, capacitance,
time constant, voltage, timer measurements, and figure of merit
measurements such as polarisation index.
