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Related Manuals for R&S RT-ZC31
Summary of Contents for R&S RT-ZC31
- Page 1 ® R&S RT-ZC31 Current Probe User Manual (B1aa2) 1801494902...
- Page 2 Rohde & Schwarz GmbH & Co. KG. Trade names are trademarks of the owners. ® 1801.4949.02 | Version 01 | R&S RT-ZC31 ® The following abbreviations are used in this manual: R&S RT-ZC31 is abbreviated as R&S RT-ZC31.
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Page 3: Table Of Contents
® Contents R&S RT-ZC31 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... - Page 4 ® Contents R&S RT-ZC31 4.1 Possible Device Errors...............36 4.2 LED Display Errors................37 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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Page 5: Notes On Safety
Notes on Safety R&S RT-ZC31 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. - Page 6 ® Notes on Safety R&S RT-ZC31 Risk of fatal injury ● 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. ● To avoid electric shock and short circuits, never attach the clamp to bare, unisolated conductors.
- Page 7 ® Notes on Safety R&S RT-ZC31 Risk of fatal injury ● 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.
- Page 8 ® Notes on Safety R&S RT-ZC31 Risk of instrument damage ● 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.
- Page 9 ® Notes on Safety 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.
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Page 10: Product Description
Product Description Product Overview The R&S RT-ZC31 is a clamp-on current probe that features high current-detec- tion sensitivity and broad frequency band. The probe uses three current ranges to detect current waveforms from a few hundred µA to 50 A. -
Page 11: Description Of The Probe
R&S RT-ZC31 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 ser- vice center. -
Page 12: Termination Unit
® Product Description R&S RT-ZC31 Description of the Probe 2.4.2 Termination Unit Figure 2-2: Termination unit overview 1 = Output terminal 2 = Unlock lever 3 = Ventilation holes User Manual 1801.4949.02 ─ 01... - Page 13 ® Product Description R&S RT-ZC31 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.
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Page 14: Junction Box (Keys, Leds)
® Product Description R&S RT-ZC31 Description of the Probe 2.4.3 Junction Box (Keys, LEDs) 1 = POWER LED 2 = OVERLOAD LED 3 = JAW UNLOCKED LED 4 = DEMAG/AUTO ZERO key 5 = DEMAG/AUTO ZERO LED 6 = RANGE LEDs 7 = ▲(Higher range) key... - Page 15 ® Product Description R&S RT-ZC31 Description of the Probe OVERLOAD LED (red light) Shows the overload status of the system. The following states are defined: Color State Flashes three Indicates that demagnetizing or automatic zero adjustment cannot be per- times formed.
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Page 16: Sensor
® Product Description R&S RT-ZC31 Description of the Probe ● The sensor head is unlocked (JAW UNLOCKED LED is lit up) ● During an overload condition (the OVERLOAD LED is flashing) ● When a measured current is detected (Higher range) key / (Lower range) key Switch over to a next higher / lower current range. - Page 17 ® Product Description R&S RT-ZC31 Description of the Probe 1 = JAW UNLOCKED indicator 2 = Current direction indicator 3 = Opening lever 4 = Sensor aperture 5 = Jaws 6 = Sensor head JAW UNLOCKED indication If the sensor head is unlocked, you can see this indication on the probe.
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Page 18: Measuring Procedure
1. Have the R&S RT-ZA13 probe power supply, and an oscilloscope or waveform measuring instrument ready. 2. Turn off the power switch. Connect the power cord. 3. Connect the power plug of the R&S RT-ZC31 to the power receptacle of the R&S RT-ZA13 probe power supply. User Manual 1801.4949.02 ─ 01... - Page 19 The POWER LED lights up in green and the DEMAG/AUTO ZERO LED is slowly flashing in orange. 6. Connect the output connector of the R&S RT-ZC31 to one of the BNC input connectors of the oscilloscope. Turn the collar until it clicks, and check that it is locked securely.
- Page 20 ® Measuring Procedure R&S RT-ZC31 Preparing the Measurement Risk of instrument damage ● Check that the conductor being measured is not clamped when supply- ing power to the device. A demagnetizing waveform may be generated when power is supplied, causing damage to components connected to the circuit being measured.
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Page 21: Demagnetizing And Zero Adjustment
Demagnetizing and Zero Adjustment Risk of circuit damage ● Do not demagnetize while the R&S RT-ZC31 is clamping a conductor to be measured. Demagnetizing causes current to flow into the conductor, which may damage parts in the circuit to be measured. - Page 22 ® Measuring Procedure R&S RT-ZC31 Demagnetizing and Zero Adjustment 3. Wait for at least 30 minutes after starting the power supply to the device before executing demagnetization and automatic zero-adjustment. Otherwise the offset voltage may increase due to the heat generation of the device.
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Page 23: Connecting The Probe To The Dut
® Measuring Procedure R&S RT-ZC31 Connecting the Probe to the DUT Risk of instrument damage When opening the sensor head, always operate the opening lever. Subject- ing the sensor head to force from the directions shown in the figure while it is locked may damage the clamping mechanism. - Page 24 ® Measuring Procedure R&S RT-ZC31 Connecting the Probe to the DUT If the sensor head is not properly closed, accurate measurement is not possi- ble. 5. Check the LEDs on the junction box: a) POWER LED and one of RANGE LEDs light up: no error b) OVERLOAD LED blinks rapidly: the probe has detected measurement cur- rent in excess of the level defined for the current range.
- Page 25 ® Measuring Procedure R&S RT-ZC31 Connecting the Probe to the DUT Measuring low currents ● To measure DC or low-frequency current, multiple windings may be used to increase relative sensitivity (10 windings multiplies the mea- sured current by a factor of 10). However, in this case, the windings should be made radially, with a diameter of at least 20 cm.
- Page 26 ® Measuring Procedure R&S RT-ZC31 Connecting the Probe to the DUT Risk of instrument damage due to continuous input current ● The maximum continuous input range is based on heat that is internally generated during measurement. Always keep the input current below this level.
- Page 27 ® Measuring Procedure R&S RT-ZC31 Connecting the Probe to the DUT Risk of instrument damage due to continuous input current ● At high ambient temperatures, the built-in safety circuit may activate at current input levels below the rated continuous maximum current.
- Page 28 ® Measuring Procedure R&S RT-ZC31 Connecting the Probe to the DUT ● Immediately after powering on, this device may be subject to an appre- ciable offset drift due to the effect of self-heating. To counteract this, allow the device to warm up for about 30 minutes before carrying out measurements.
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Page 29: Disconnecting The Probe From The Dut
® Measuring Procedure R&S RT-ZC31 Disconnecting the Probe from the DUT At high frequencies, common mode noise may affect measurements taken on the high voltage side of circuits. If this occurs, reduce the frequency range of the waveform measuring instrument, or clamp onto the low-voltage side of the circuit, as appropriate. -
Page 30: How To Measure Current Accurately
® Measuring Procedure R&S RT-ZC31 How to Measure Current Accurately 5. Remove the power plug of the device from the R&S RT-ZA13 probe power supply. 6. Unplug the R&S RT-ZA13 probe power supply power cord from the electrical outlet. Risk of instrument damage ●... -
Page 31: Protection Mode
® Measuring Procedure R&S RT-ZC31 Protection Mode The DEMAG / AUTO ZERO LED lights up, and automatic zero-adjustment is performed alone. After the completion, the DEMAG / AUTO ZERO LED goes out. 6. Measure a current. Protection Mode To protect the device against self-generated heat, it enters protection mode when the temperature of the junction box exceeds a specified level. -
Page 32: Typical Characteristics
The DEMAG / AUTO ZERO LED blinks slowly, which indicates demagnetiza- tion and automatic zero-adjustment are required. Typical Characteristics All the characteristics shown in this section are typical for R&S RT-ZC31. User Manual 1801.4949.02 ─ 01... -
Page 33: Frequency Characteristics
® Measuring Procedure R&S RT-ZC31 Typical Characteristics 3.7.1 Frequency Characteristics Figure 3-2: Frequency characteristics 3.7.2 Frequency Derating Curve Fig. 3-3 shows the derating curves with a sine-wave current input. If the ambient temperature rises or the current being measured contains high-frequency compo- nents, the device temperature rises, and thus its continuously inputtable current value and frequency lowers. -
Page 34: Input Impedance
® Measuring Procedure R&S RT-ZC31 Typical Characteristics 3.7.3 Input Impedance The current probe inserts a load in the circuit to be measured as shown in fig. 3-4. In particular, take this characteristic into account when measuring a high-fre- quency current. -
Page 35: Influence Of Common-Mode Voltage
® Measuring Procedure R&S RT-ZC31 Typical Characteristics Figure 3-5: Consumption current (with the specified 30 A range ) 3.7.5 Influence of Common-Mode Voltage Fig. 3-6 shows the ratio of a common-mode voltage applied to the conductor being measured and the resulting output voltage. -
Page 36: Troubleshooting
® Troubleshooting R&S RT-ZC31 Possible Device Errors Troubleshooting If damage is suspected, observe the information in the following chapter before returning for servicing. Possible Device Errors No waveform is displayed on the host waveform measuring instrument 1. Re-execute demagnetization and automatic zeroadjustment. -
Page 37: Led Display Errors
® Troubleshooting R&S RT-ZC31 LED Display Errors ● A current exceeding 0.5 A rms has been detected. If you observe this, implement the remedy described in Table 4-1. Then repeat the demagnetization and automatic zero-adjustment, see Chapter 3.2, "Demag- netizing and Zero Adjustment",... - Page 38 ® Troubleshooting R&S RT-ZC31 LED Display Errors Table 4-1: LED errors Error state Meaning Protection mode A temperature anomaly has been detected and the device has entered protection mode. Remove the device from the conductor being measured immediately. Allow the device to cool under condi- tions of no input and then press the DEMAG/AUTO ZERO key.
- Page 39 ® Troubleshooting R&S RT-ZC31 LED Display Errors Error state Meaning Demagnetizing / automatic zero- adjustment unavailable This issue occurs when the DEMAG/ AUTO ZERO key is pressed under the circumstances described in the table below. Demagnetization and automatic zero adjustment cannot be performed. Per-...
- Page 40 ® Troubleshooting R&S RT-ZC31 LED Display Errors Error state Meaning All LEDs blink rapidly. Checksum error An internal CPU malfunction (checksum error) has occurred. Send it to the ser- vice center for repair. No LEDs light up. Malfunction The device has malfunctioned. Send it to the service center for repair.
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Page 41: Maintenance And Service
® Maintenance and Service R&S RT-ZC31 Contacting Customer Support Maintenance and Service If service or calibration is needed, contact your Rohde & Schwarz service center. Return a defective product to the Rohde & Schwarz service center for diagnosis and exchange. -
Page 42: Returning For Servicing
Figure 5-1: QR code to the Rohde & Schwarz support page Returning for Servicing Use the original packaging to return your R&S RT-ZC31 to your Rohde & Schwarz service center. A list of all service centers is available on: www.services.rohde-schwarz.com If you cannot use the original packaging, consider the following: 1. -
Page 43: Discarding The Product
® Maintenance and Service R&S RT-ZC31 Discarding the Product Discarding the Product Handle and dispose the product in accordance with local regulations. User Manual 1801.4949.02 ─ 01... -
Page 44: S Rt-Za13 Probe Power Supply
® R&S RT-ZA13 Probe Power Supply R&S RT-ZC31 R&S RT-ZA13 Probe Power Supply This unit is a special-purpose power supply for the current probes. You can connect up to four current probes to the power supply. Front view Rear view...