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Current
Probes SS-250/SS-240A
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TOP
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 SS-250/SS-240A
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Supports
various applications
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Displays
its capabilities in full force in current waveform observation and
wide-band applications such as switching power supplies, optical disc
manufacturing lines, and semiconductor power devices.
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Features
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Low
noise characteristics for easy milliampere order observation
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Wide
bandwidth - DC to 100 MHz (SS-250)/DC to 50 MHz (SS-240A)
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High
sensitivity and wide bandwidth implemented through use of thin-film Hall
element
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Power
can be provided directly from the oscilloscope
(Models with on-board power supplies for Iwatsu probes: TS-81000, TS-80600,
SS-7840H, SS-7840, SS-7830
Models that are no longer available: TS-8500, SS-7825 and others with on-board
power supply connectors)
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Clamp
type, enabling easy measurement without having to disconnect the electrical
circuit
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Equipped
with a function that provides simple protection for excessive input
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Can
also be used with measuring instruments that do not have a power supply for
probes (power can be provided through the optional probe power supply
PS-26)
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Specifications
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Item
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SS-250
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SS-240A
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Bandwidth
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DC to 100 MHz
(-3dB)
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DC to 50 MHz
(-3dB)
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Maximum
input current
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Maximum
input range
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30 A
rms
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30 A
rms
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Maximum
peak current
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50 A
peak, non-continuous
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50 A
peak, non-continuous
50 A peak at pulse width <= 10 µs
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Output
sensitivity
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0.1 V/A
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Sensitivity
accuracy
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•±1.0%
of reading ±10 mA for probes only (in the range from 0 to 30 A rms, DC,
and AC 45 to 66 Hz)
•±2.0% of reading for probes only (50 A peak or less and over 30 A rms,
DC, and in the range of AC 45 to 66 Hz)
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Noise
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2.5 mA rms or less (observation using an
oscilloscope with a 20 MHz band)
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Power
consumption
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5.3 VA max.
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5.6 VA max.
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Power
supply voltage
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±12 V ±0.5 V
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Operating
temperature and humidity
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0°C to +40°C, 80% RH or less
(no condensation)
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Storage
temperature and humidity
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-10°C to +50°C, 80% RH or less
(no condensation)
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Operating
elevation
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2000 m or less (air pressure approx. 79 kPa),
indoor
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Effects
of external magnetic field
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5 mA max. or equivalent (in DC, 60 Hz, 400 A/m
AC magnetic field)
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20 mA max. or equivalent (in DC, 60 Hz, 400 A/m
AC magnetic field)
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Maximum
usable circuit voltage
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300 V, CAT I (insulating conductor)
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Conductor
diameter that can be measured
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ø 5 mm
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Cable
length
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Sensor
cable
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Approx. 1.5 m
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Power
cable
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Approx. 1 m
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Size
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Sensor
part
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Approx. 175 (W) x 18 (H) x 40 (D) mm
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Termination
part
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Approx. 27 (W) x 55 (H) x 18 (D) mm
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Weight
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Approx. 240 g
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Approx. 230 g
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Complied
with standards
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Safety
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EN61010-2-032:2002
Measurement category I (expected overvoltage: 1500 V),
Pollution degree: 2
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EMC
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EN61326:1997+A1:1988+A2:2001
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Accessories
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Instruction manual (1),
hard case (1)
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Instruction manual (1),
soft case (1)
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*
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Values
for performance/accuracy items are at 23°C ±5°C and 30 minutes after
power-on.
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Characteristics figures
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SS-250 Continuous maximum input range (frequency derating)
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SS-240A Continuous maximum input range (frequency derating)
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These
current probes can be used as-is with oscilloscopes that feature power
supply connectors for active probes. Current probes can also be used with
oscilloscopes without power supply connectors for active probe, when used
in combination with the power supply (PS-26) that is sold separately.
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*
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Use a
jack plug conversion BNC plug adapter for oscilloscopes for which
connection to the SS-250/SS-240A is obstructed due to the input BNC
connector being built into the external case (Iwatsu product DS-8710/8706).
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*
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When
the SS-250/SS-240A is used with an oscilloscope with a power supply for a
probe, if the current being measured is large, the power supply for current
probe PS-26 may be required.
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*
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With
the power supply for current probe PS-26, if the current being measured is
large, it may not be possible to use two SS-250/SS-240A units at the same
time.
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Caution
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1.
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Use
this product in circuits that do not exceed the maximum usable circuit
voltage, so as to avoid accidents such as short-circuits and physical
injuries.
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2.
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Do not
use this product with bare conductors, so as to avoid accidents such as
physical injuries and short-circuits when the leading end of the clamp core
is opened.
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PS-26 Power
Supply for SS-250/SS-240A/SS-240
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 PS-26
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This is
a current probe power supply for use when performing measurements with an
oscilloscope that does not have an active probe power supply.
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Specifications
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Conforming
current probes
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SS-250/SS-240A/SS-240
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Number
of power connectors
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2
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Output
voltage
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±12 V
±0.5 V
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Output
current
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600
mA max. (total of all channels)
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Operating
temperature and humidity
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0°C
to +40°C, 80% RH or less (no condensation)
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Storage
temperature and humidity
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-10°C
to +50°C, 80% RH or less (no condensation)
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Operating
elevation
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Up to
2000 m, indoors
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Power
supply voltage
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AC
100 V (Can be set to 120, 220, or 240 V)
(taking into account a voltage variation of ±10% for the power supply
voltage)
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Rated
power supply frequency
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50Hz
/ 60Hz
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Power
consumption
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20 VA
max.
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Size
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Approx. 73 (W) x 110 (H) x 186 (D) mm
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Weight
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Approx.
1.1 kg (except accessories)
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Complied
with standards
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Safety
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EN61010-1:2001
Pollution degree: 2
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EMC
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EN61326:1997+A1:1998+A2:2001
EN61000-3-2:2000
EN61000-3-3:1995+A1:2001
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Accessories
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Power
cord (1), instruction manual (1),
spare fuse (1)
•When shipped with 100/120 V product: F1.0 AL/250 V (f5 x
20 mm) for 100/120 V
•When shipped with 220/240 V product: F0.5 AL/250 V (f5 x
20 mm) for 220/240 V
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*
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With
the power supply for current probe PS-26, if the current being measured is
large, it may not be possible to use two SS-250/SS-240A units at the same
time.
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Low noise characteristics
