Rohde Schwarz RT-ZC31 User Manual
®
R&S
RT-ZC31
Current Probe
User Manual
(B1aa2)
1801494902
Version 02
This manual describes the following R&S products:
●
R&S®RT-ZC31, Current Probe (1801.4932.02)
●
R&S®RT-ZA13, Probe Power Supply (1409.7789.02)
© 2020 Rohde & Schwarz GmbH & Co. KG
Mühldorfstr. 15, 81671 München, Germany
Phone: +49 89 41 29 - 0
Email: info@rohde-schwarz.com
Internet: www.rohde-schwarz.com
Subject to change – data without tolerance limits is not binding.
R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG.
Trade names are trademarks of the owners.
1801.4949.02 | Version 02 | R&S®RT-ZC31
The following abbreviations are used in this manual: R&S®RT-ZC31 is abbreviated as R&S RT-ZC31.
R&S®RT-ZC31
Contents
Contents
1 Notes on Safety......................................................................5
2 Product Description............................................................ 10
2.1 Product Overview............................................................................... 10
2.2 Key Features....................................................................................... 10
2.3 Inspecting the Contents..................................................................... 10
2.4 Description of the Probe.................................................................... 11
2.4.1 Probe Overview.....................................................................................11
2.4.2 Termination Unit.................................................................................... 12
2.4.3 Junction Box (Keys, LEDs)................................................................... 14
2.4.4 Sensor...................................................................................................16
3 Measuring Procedure.......................................................... 18
3.1 Preparing the Measurement...............................................................18
3.2 Demagnetizing and Zero Adjustment............................................... 21
3.3 Connecting the Probe to the DUT..................................................... 23
3.4 Disconnecting the Probe from the DUT............................................29
3.5 How to Measure Current Accurately................................................. 30
3.6 Protection Mode..................................................................................31
3.7 Typical Characteristics....................................................................... 32
3.7.1 Frequency Characteristics.................................................................... 33
3.7.2 Frequency Derating Curve....................................................................33
3.7.3 Input Impedance................................................................................... 34
3.7.4 Consumption Current............................................................................34
3.7.5 Influence of Common-Mode Voltage.....................................................35
4 Troubleshooting...................................................................36
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R&S®RT-ZC31
4.1 Possible Device Errors.......................................................................36
4.2 LED Display Errors............................................................................. 37
Contents
5 Maintenance and Service....................................................41
5.1 Cleaning...............................................................................................41
5.2 Contacting Customer Support...........................................................41
5.3 Returning for Servicing...................................................................... 42
5.4 Calibration Interval............................................................................. 42
5.5 Discarding the Product...................................................................... 43
6 R&S RT-ZA13 Probe Power Supply....................................44
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R&S®RT-ZC31
Notes on Safety
1 Notes on Safety
Thank you for purchasing the R&S RT-ZC31 current probe.
To obtain maximum performance from the device, please read this manual first,
and keep it handy for future reference.
Risk of physical injury
This device is designed to comply with IEC 61010 Safety Standards, and
has been thoroughly tested for safety before shipment. However, mishandling during use could result in injury or death, and damage to the device.
Be certain that you understand the instructions and precautions in the manual before use.
Follow these precautions to ensure safe operation and to obtain the full benefits
of the various functions.
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R&S®RT-ZC31
Risk of fatal injury
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To avoid electric shock, do not remove the device's cover. The internal
components of the device carry high voltages and may become very hot
during operation.
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To avoid electric shock and short circuits, never attach the clamp to
bare, unisolated conductors.
Make sure to measure at a location on an insulated wire where the insulation is sufficient for the circuit voltage.
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Be careful to avoid damaging the insulation surface while taking measurements.
Notes on Safety
●
Refer to the derating characteristics when measuring current that
includes a high-frequency component and never measure any current
that exceeds the rated current. Use with high frequencies or strong
magnetic fields may cause the device to become abnormally hot, resulting in fire, equipment damage, or burns.
●
To prevent fire or damage of the measurement target and device as well
as burns, exercise caution concerning the following when measuring
high-frequency currents or currents that contain high-frequency components:
– Eddy current loss may cause heating of the sensor head.
– Dielectric heating may cause heating of cord insulation and other
materials.
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Connect the probe only to the secondary side of a breaker, so the
breaker can prevent an accident if a short circuit occurs. Never connect
it to the primary side of a breaker, because unrestricted current flow
could cause a serious accident if a short circuit occurs.
●
Be sure to observe all operating precautions for the oscilloscope and
other instruments to which this device is connected.
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R&S®RT-ZC31
Risk of fatal injury
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This device is made for use with the R&S RT-ZA13 probe power supply.
●
When using a measurement instrument that does not provide isolation
between its input terminals and chassis or other input terminals, please
pay attention to the following points. If a signal is applied to an input terminal other than that to which this device is connected, do not connect
the ground-side terminal to any nonground potential. Otherwise, shortcircuit current flows through the R&S RT-ZA13 probe power supply, or
this device from the ground terminal, which could cause an electrical
accident or damage.
Notes on Safety
Shock hazard
To avoid shock and short circuits, turn off all power before connecting the
device.
Do not allow the device to get wet, and do not take measurements with wet
hands. This may cause an electric shock.
To avoid electric shock when measuring live lines, wear appropriate protective gear, such as insulated rubber gloves, boots, and a safety helmet.
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R&S®RT-ZC31
Risk of instrument damage
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To avoid damage to the device, protect it from vibration or shock during
transport and handling, and be especially careful to avoid dropping.
●
To avoid damage to the device, do not place the device on an unstable
table or an inclined place. Dropping or knocking down the device can
cause injury or damage to the device.
●
Do not store or use the device where it could be exposed to direct sunlight, high temperature, humidity, or condensation. Under such conditions, the device may be damaged and insulation may deteriorate so
that it no longer meets its specifications.
●
Do not store or use the device near induction heating systems (such as
high-frequency induction heating systems and IH cooking equipment)
Notes on Safety
●
Do not store or use the device near HF power supply units.
●
Before using the device the first time, verify that it operates normally to
ensure that no damage occurred during storage or shipping. If you find
any damage, contact your dealer or R&S representative.
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This device is not designed to be entirely water- or dust-proof. To avoid
damage, do not use it in a wet or dusty environment.
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The sensor head is a precision assembly including a molded component, a ferrite core, and a Hall effect element. It may be damaged if subjected to sudden changes in ambient temperature, or mechanical strain
or shock, and therefore great care should be exercised in handling it.
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Do not apply a static electricity or other source of high voltage to the
sensor. Doing so may damage the internal Hall elements and circuitry of
the sensor.
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The mating surfaces of the sensor head are precision, and should be
treated with care. If these surfaces are scratched, performance may be
impaired.
●
Do not place foreign objects between the mating faces of the sensor
head, insert foreign objects into the gaps of the sensor head, or touch
the mating faces. Doing so may worsen the performances of the sensor
or interfere with clamping action.
●
While the POWER LED is on, keep the core section of the sensor
closed, except when clamping it onto the conductor to be measured.
The mating surface of the core section can be scratched while it is open.
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R&S®RT-ZC31
●
Keep the sensor head closed when not in use, to avoid accumulating
dust or dirt on the mating core surfaces, which could interfere with
clamp performance.
●
Avoid stepping on or pinching the cable, which could damage the cable
insulation.
●
Keep the cable well away from heat sources, as bare conductors could
be exposed if the insulation melts.
●
Do not obstruct the ventilation holes on the sides and bottom of the terminator, as it could overheat and be damaged, or cause a fire.
Strong electromagnetic fields
Correct measurement may be impossible in the presence of strong magnetic fields, such as near transformers and high-current conductors, or in the
presence of strong electromagnetic fields such as near radio transmitters.
Notes on Safety
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R&S®RT-ZC31
Product Description
Inspecting the Contents
2 Product Description
2.1 Product Overview
The R&S RT-ZC31 is a clamp-on current probe that features high current-detection sensitivity and broad frequency band. The probe uses three current ranges to
detect current waveforms from a few hundred µA to 50 A.
By clamping on the conductor to be measured, the current waveform is captured
easily without interrupting the electric circuit.
2.2 Key Features
●
The sensor head has a clamp design that makes it possible to easily observe
current waveforms while current continues to flow through the conductor being
measured.
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Three current measurement ranges: 0.1 V/A, 1 V/A, and 10 V/A.
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You can observe low-current waveforms at the high sensitivity of 10 V/A.
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LED warnings indicate overload and unlocked sensor head.
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Broadband frequency characteristics DC to 120 MHz.
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Demagnetization and automatic zero adjustment functions make it easy to get
ready for measurement.
2.3 Inspecting the Contents
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Inspect the package for damage.
Keep the package and the cushioning material until the contents have been
checked for completeness and the device has been tested.
If the packaging material shows any signs of stress, notify the carrier and your
Rohde & Schwarz service center. Keep the package and cushioning material
for inspection.
●
Inspect the probe.
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R&S®RT-ZC31
Product Description
Description of the Probe
If there is any damage or defect, or if the R&S RT-ZC31 current probe does
not operate properly, notify your Rohde & Schwarz service center.
●
Inspect the accessories.
If the contents are incomplete or damaged, notify your Rohde & Schwarz service center.
The following accessories are delivered with the probe:
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User manual
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Carrying case
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R&S RT-Zxx data sheet
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Calibration certificate
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Documentation of calibrated values
2.4 Description of the Probe
2.4.1 Probe Overview
Figure 2-1: Probe overview
1 = Sensor
2 = Junction box
3 = Termination unit
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R&S®RT-ZC31
2.4.2 Termination Unit
Product Description
Description of the Probe
Figure 2-2: Termination unit overview
1 = Output terminal
2 = Unlock lever
3 = Ventilation holes
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R&S®RT-ZC31
Product Description
Description of the Probe
4 = Serial number
5 = Power plug
6 = Shell
Unlock lever
The lock mechanism keeps the clamp closed.
Vents
The vents are on the sides and bottom. Do not clog them.
Power plug
Connect the plug to the R&S RT-ZA13 probe power supply receptacle to supply
power to the sensor.
Shell
Pull on the power plug while simultaneously pulling this shell to disconnect the
plug.
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R&S®RT-ZC31
2.4.3 Junction Box (Keys, LEDs)
Product Description
Description of the Probe
1 = POWER LED
2 = OVERLOAD LED
3 = JAW UNLOCKED LED
4 = DEMAG/AUTO ZERO LED
5 = DEMAG/AUTO ZERO key
6 = RANGE LEDs
7 = ▲(Higher range) key
8 = ▼(Lower range) key
POWER LED
The POWER LED turns green (lighting up continuously) when the device is energized. It flashes rapidly if a checksum error has occurred.
14User Manual 1801.4949.02 ─ 02
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