Page 1
CT4447 Series
30 MHz High-Voltage Differential
Probes, cTUVus Listed
User Manual
Page 2
Notices
Copywrite © 2022 Cal Test Electronics, Inc. All rights reserved.
Unauthorized duplication of this documentation material is strictly prohibited. Users are permitted to
duplicate and distribute this documentation for internal educational purposes only. Cal Test Electronics
is governed by United States and international copywrite laws.
Made in Taiwan
User Manual Part Number
451-043-001 Rev. D
Available in electronic format only
Published by:
Cal Test Electronics, Inc.
22820 Savi Ranch Parkway
Yorba Linda, CA 92887 USA
Warranty
LIMITED TWO-YEAR WARRANTY
Cal Test Electronics, Inc warrants these products to be free from defective material or workmanship for
a period of 2 years from the date of original purchase. Under this warranty, Cal Test Electronics, Inc
is limited to repairing this product when returned to the factory, shipping charges prepaid, within the
warranty period.
Units returned to Cal Test Electronics, Inc that have been subject to abuse, misuse, damage, or
accident, or have been connected, installed, or adjusted contrary to the instructions furnished by Cal
Test Electronics, Inc, or that have been repaired by unauthorized persons, will not be covered by this
warranty.
Cal Test Electronics, Inc reserves the right to discontinue models, change specications, price, or
design of this device at any time without notice and without incurring any obligation whatsoever.
The purchaser agrees to assume all liabilities for any damages and/or bodily injury which may result
from the use or misuse of this device by the purchaser, his employees, or agents.
THIS WARRANTY IS IN LIEU OF ALL OTHER REPRESENTATIONS OR WARRANTIES EXPRESSED
OR IMPLIED AND NO AGENT OR REPRESENTATIVE OF CAL TEST ELECTRONICS, INC IS
AUTHORIZED TO ASSUME ANY OTHER OBLIGATION IN CONNECTION WITH THE SALE AND
PURCHASE OF THIS DEVICE.
2 CT4447 Series High-Voltage Differential Probes User Manual
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Contents
Notices ......................................................2
User Manual Part Number .......................................2
Warranty .....................................................2
Contents ....................................................3
Compliance Information .........................................5
EMC ........................................................5
EC Declaration of Conformity - EMC ..............................5
Safety .......................................................5
EC Declaration of Conformity - Low Voltage ........................5
U.S. and Canadian Recognized Agency Certication .................5
Environmental ................................................5
Restriction of Hazardous Substances (RoHS 2) .....................5
Product End-of-Life Handling ...................................6
Terms & Symbols ..............................................7
Terms .......................................................7
Symbols .....................................................7
Safety Information .............................................8
Safety Notices ................................................8
IEC Measurement Category & Pollution Degree Denitions .............11
Introduction ..................................................12
Overview ....................................................12
Supplied Accessories ...........................................14
Setting Up and Using the Probe ...................................15
Setting Up ....................................................15
Using .......................................................15
Specications & Characteristics ...................................17
Performance Plots .............................................19
Performance Verication ........................................22
Required Equipment ............................................22
Test Procedures ...............................................23
Test Setup ..................................................23
Gain Accuracy ...............................................24
Rise Time ..................................................25
3CT4447 Series High-Voltage Differential Probes User Manual
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Cleaning .....................................................26
China RoHS 2 ................................................27
Hazardous Substances Disclosure Table ...........................27
4 CT4447 Series High-Voltage Differential Probes User Manual
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Compliance Information
EMC
EC Declaration of Conformity - EMC
Compliance was demonstrated to the following specications listed in the Ofcial Journal of the
European Communities: EMC Directive 2014/30/EU.
EN 61326-1:2013. Electrical equipment for measurement, control and laboratory use-
EMC requirements Part 1: General requirements.
Safety
EC Declaration of Conformity - Low Voltage
Compliance was demonstrated to the following specication as listed in the Ofcial Journal of the
European Communities: Low Voltage Directive: 2014/35/EU.
EN 61010-1:2010+A1:2019. Safety requirements for electrical equipment for
measurement, control and laboratory use - Part 1: General requirements
EN 61010-031:2015 Ed 2.0. Safety requirements for electrical equipment for
measurement, control and laboratory use - Part 031: Safety requirements for handheld probe assemblies for electrical measurement and test.
U.S. and Canadian Recognized Agency Certication
The probe is has been certied by TUV Rheinland Taiwan Ltd. (TUV) to conform to the following safety
standard and bears the cTUVus mark.
IEC 61010-031:2015 Ed. 2.0. Safety requirements for electrical equipment for
measurement, control and laboratory use - Part 031: Safety requirements for handheld probe assemblies for electrical measurement and test.
Environmental
Restriction of Hazardous Substances (RoHS 2)
The product and its accessories conform to the Directive 2011/65/EU (RoHS 2) on the restriction of the
use of certain hazardous substances in electrical and electronic equipment, inclusive of any modication
and addendum to said Directive.
EN ISO 63000:2018 Technical documentation for the assessment of electrical and
electronic products with respect to the restriction of hazardous substances.
China RoHS 2 refers to the Ministry of Industry and Information Technology Order No.
32, effective July 1, 2015. See “Hazardous Substances Disclosure Table” on page
27.
5CT4447 Series High-Voltage Differential Probes User Manual
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Product End-of-Life Handling
The equipment may contain substances that could be harmful to the environment or human health
if improperly handled at the product’s end of life. To avoid release of such substances into the
environment and to reduce the use of natural resources, we encourage you to recycle this product to an
appropriate system that will ensure that most of the materials are reused or recycled appropriately.
This product is subject to Directive 2012/19/EU of the European Parliament and the
Council of the European Union on waste electrical and electronic equipment (WEEE),
and in jurisdictions adopting that Directive, is marked as being put on the market after
August 13, 2005, and should not be disposed of as unsorted municipal waste. Please
utilize your local WEEE collection facilities in the disposition of this product.
6 CT4447 Series High-Voltage Differential Probes User Manual
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Terms & Symbols
The following terms, symbols, and denitions, individually or combination may appear on the product or
in this user manual.
Terms
A caution statement calls attention to an operating procedure, practice, or condition,
CAUTION
which, if not followed correctly, could result in damage to or destruction of parts or the
entire product.
MISE EN GARDE
A warning statement calls attention to an operating procedure, practice, or condition,
WARNING
AVERTISSEMENT
A note statement calls attention to an operating procedure, practice, or condition,
NOTE
REMARQUE
Une mise en garde attire l’attention sur une procédure, une pratique ou une condition
d’utilisation qui, si elles ne sont pas suivies correctement, pourraient endommager ou
détruire une partie du produit ou le produit entier.
which, if not followed correctly, could result in injury or death to personnel.
Un avertissement attire l’attention sur une procédure, pratique ou condition de
fonctionnement qui, si elles ne sont pas suivies correctement, pourraient entraîner des
blessures, voire la mort de l’utilisateur.
which, should be noted before proceeding.
Un énoncé de note attire l’attention sur une procédure, une pratique ou une condition
d’exploitation, qui doit être notée avant de continuer.
Symbols
CAUTION – Statements or instructions that must be consulted in order to nd
out the nature of the potential hazard and any actions which must be taken.
WARNING - HIGH VOLTAGE - possibility of electric shock.
Earth (ground) TERMINAL - Refer to the instructions accompanying this sym-
bol in this manual.
The Conformitè Europëenne (CE) mark is the European Union’s (EU) man-
datory conformity marking for regulating the goods sold within the European
Economic Area (EEA).
The cTUVus mark certies that a product complies with North American electri-
cal and safety standards, including those written by Underwriters Laboratories
and the CSA Group (CSA).
7CT4447 Series High-Voltage Differential Probes User Manual
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Safety Information
Safety Notices
These test probes have been designed and tested in accordance with accepted industry and has
been supplied is a safe condition. Before applying power, verify that the correct safety precautions are
taken (see the following warnings). In addition, note the external markings on the instrument that are
described under “Symbols” on page 7.
Throughout this manual and specically in this section, there are warnings, cautions, and notes that you
must follow to ensure safe operation and to maintain the probe in a safe condition.
To avoid personal injury and to prevent re or damage to the probe and the products
WARNING
connected to it, review and comply with the following safety Warning and Cautions.
AVERTISSEMENT
Do not use your probe in a manner not specied by the manufacturer. Be aware, that
WARNING
AVERTISSEMENT
Pour éviter les blessures corporelles et éviter un incendie ou des dommages à la
sonde et aux produits qui y sont connectés, lisez et respectez les avertissements et
mises en garde de sécurité suivants.
if used in a manner not specied by the manufacturer, the protection provided by the
probe assembly may be impaired.
N’utilisez pas votre sonde d’une manière non spéciée par le fabricant. Sachez que
s’il est utilisé d’une manière non spéciée par le fabricant, la protection fournie par
l’ensemble de sonde peut être altérée.
The Probe Must be Grounded.
WARNING
AVERTISSEMENT
Connect and Disconnect the Probe Properly.
WARNING
AVERTISSEMENT
Observe Maximum Working Voltages.
WARNING
Before making connections to the input leads of the probe, ensure that the output
BNC connector is attached to the BNC input channel of the oscilloscope AND the
oscilloscope is properly grounded.
La sonde doit être mise à la terre.
Avant d’effectuer les connexions aux ls d’entrée de la sonde, assurez-vous que le
connecteur BNC de sortie est connecté au canal d’entrée BNC de l’oscilloscope ET
que l’oscilloscope est correctement mis à la terre.
Connect the probe to the oscilloscope before connecting the probe inputs to the circuit
under test. Disconnect the probe inputs from the circuit under test before disconnecting
the probe from the oscilloscope.
Connectez et déconnectez correctement la sonde.
Connectez la sonde à l’oscilloscope avant de connecter les entrées de la sonde
au circuit à tester. Déconnectez les entrées de la sonde du circuit à tester avant de
déconnecter la sonde de l’oscilloscope.
To avoid injury, do not use the probes above 1000 Vrms in a CAT III environment
between each input lead and earth or between the two input leads.
Do not operate the CT4447-2 probe above 1000 Vrms mains isolated (200x
8 CT4447 Series High-Voltage Differential Probes User Manual
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attenuation) between the two input leads and above 1000 Vrms mains isolated (both
20x and 200x attenuation) between each input lead and earth.
AVERTISSEMENT
Respecter les tensions de fonctionnement maximales.
Pour éviter les blessures, n’utilisez pas les sondes au-dessus de 1000 Vrms dans
un environnement CAT III entre chaque l d’entrée et la terre ou entre les deux ls
d’entrée.
Ne pas faire fonctionner la sonde CT4447-2 au-dessus de 1000 Vrms isolé du secteur
(200x atténuation) entre les deux câbles d’entrée et au-dessus de 1000 Vrms isolé du
secteur (à la fois 20x et 200x atténuation) entre chaque câble d’entrée et la terre.
Do not attempt internal service or adjustment.
WARNING
Do not install substitute parts or perform unauthorized modications to the probe.
Service should be carried out by Cal Test authorized service personnel. For any
service needs, contact Cal Test Electronics.
AVERTISSEMENT
Ne tentez pas d’entretien ou de réglage interne.
N’installez pas de pièces de rechange et n’effectuez pas de modications non
autorisées sur la sonde. Le service doit être effectué par le personnel de service
autorisé par Cal Test. Pour tout besoin de service, contactez Cal Test Electronics.
Do Not Operate Without Covers. To avoid electrical shock, or re hazard, do not
WARNING
operate these probes with cover removed.
AVERTISSEMENT
Ne pas utiliser sans couvercles. Pour éviter les chocs électriques ou les risques
d’incendie, n’utilisez pas ces sondes avec le couvercle retiré.
Avoid Exposed Circuit. To avoid injury, remove jewelry such as rings, watches, and
WARNING
other metallic objects. Do not touch exposed connections and components when
power is present.
AVERTISSEMENT
Évitez les circuits exposés. Pour éviter les blessures, retirez les bijoux tels que
bagues, montres et autres objets métalliques. Ne touchez pas les connexions et les
composants exposés lorsque l’alimentation est présente.
Use Proper Power Source. To ensure these probes function well, use either four fresh
WARNING
AA batteries or the supplied USB power cord.
AVERTISSEMENT
Utilisez une source d’alimentation appropriée. Pour garantir le bon fonctionnement
de ces sondes, utilisez soit quatre piles AA neuves, soit le cordon d’alimentation USB
fourni.
For Indoor Use Only. To avoid electric shock, injury, or re hazard, do not operate this
WARNING
probe in wet or damp conditions or in an explosive atmosphere.
AVERTISSEMENT
Pour une utilisation en intérieur uniquement. Pour éviter les chocs électriques, les
blessures ou les risques d’incendie, n’utilisez pas cette sonde dans des conditions
humides ou humides ou dans une atmosphère explosive.
9CT4447 Series High-Voltage Differential Probes User Manual
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Periodically inspect your probe and probe wires to check for any damage. Do Not
CAUTION
WARNING
Operate with Visible or Suspected Failures. If you suspect there is damage, have it
inspected by Cal Test authorized service personnel.
AVERTISSEMENT
Inspectez périodiquement votre sonde et ses ls pour vérier qu’ils ne sont pas
endommagés. Ne pas utiliser avec des défaillances visibles ou suspectées. Si vous
pensez qu’il y a des dommages, faites-le inspecter par le personnel de service autorisé
de Cal Test.
When it is likely that the ground protection is impaired, you must make the instrument
WARNING
inoperative and secure it against any unintended operation.
AVERTISSEMENT
Lorsqu’il est probable que la protection au sol soit altérée, vous devez rendre
l’instrument inopérant et le sécuriser contre tout fonctionnement intempestif.
The probe and its cables are sensitive parts and therefore, you should be careful not
to damage them though excessive bending or pulling. Avoid any mechanical shocks to
the probe to guarantee accurate performance and protection.
MISE EN GARDE
La sonde et ses câbles sont des pièces sensibles et, par conséquent, vous devez faire
attention à ne pas les endommager en les pliant ou en tirant excessivement. Évitez
tout choc mécanique sur la sonde pour garantir des performances et une protection
précises.
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IEC Measurement Category & Pollution Degree Denitions
Measurement Category (CAT) - classication of testing and measuring circuits according to the types of
mains circuits to which they are intended to be connected.
Measurement Category other than II, III, or IV: circuits that are not directly connected
to the mains supply.
Measurement Category II (CAT II): test and measuring circuits connected directly
to ultilzation points (socket outlets and similar prints) of the low-voltage mains
installation..
Measurement Category III (CAT III): test and measuring circuits connected to the
distribution part of a building’s low-voltage mains installation.
Measurement Category IV (CAT IV): test and measuring circuits connected at the
source of the building’s low-voltage mains installation.
Mains Isolated: is for measurements performed on circuits not directly connected to a
mains supply.
Pollution - addition of foreign matter, solid, liquid, or gaseous (ionized gases) that may produce a
reduction of dielectric strength or surface resistivity.
Pollution Degree 2 (P2) - only non-conductive pollution occurs except that occasionally
a temporary conductivity caused by condensation is expected.
11CT4447 Series High-Voltage Differential Probes User Manual
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Introduction
Overview
The Cal Test CT4447 Series High-Voltage Differential probes allow conventional earth-grounded
oscilloscopes to be used for oating signal measurements - up to 700 V differential or common mode
voltage (CT4447-1) and up to 1400 V differential or common mode voltage (CT4447-2).
Each model offers user selectable attenuation setting of 10x & 100x (CT4447-1) and 20x & 200x
(CT4447-2), making both probes highly versatile and usable for a broad range of applications including
power supply measurements and moter controls.
Both probes are compatible with any oscilloscope with a 1 MΩ BNC female input and feature up to 30
MHz of bandwidth. The probes can be powered by any oscilloscope USB port, internal batteries (4 AA
batteries included with the probe), or included mains power adapter.
The gure below show some key features of the CT4447 series probe.
Input leads
Protective
Rubber Boot
(Removable)
Power and Over
Range Indicator
4mm Sheathed
Banana Plug
Connectors
USB-C Input
Power Port
Insulated BNC Male
Output Connector
Output Cable
(on side of probe)
Power Button
Figure 1 Probe and Supplied Accessories
LED
Attenuation Selection
Button & LED Indicators
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Table 1 Key Features
Features Description
Attenuation Selection
Button & LED Indicators
Power Button
Power and Overload
indicator LED
4 mm Sheathed Banana
Plug Connectors
Insulated BNC Male Output
Connector
USB-C Input Power Port
(on side of probe)
Press the Attenuation selection button to switch between the two
ranges. LED indicator will light green for attenuation selected.
Press to turn unit on.
Press and hold for 5 seconds to turn unit off.
LED will turn green when the unit is on.
LED will turn red when the unit is in voltage overload condiction.
(Dimming of LED may indicate low batteries.)
Connects the probe to the DUT using probe hook pair provided wih the
probe.
The probe’s output connect is full insulated and connects directly to an
oscilloscope’s BNC female input channel connector.
Use USB-C Power Port to connect with USB cable when powering from
mains adapter or oscilloscope’s USB port.
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Supplied Accessories
Table 2 CT4447 Accessories
Accessory Model No. Quantity
Probe Hook, Pair
(black & red)
Protective Rubber Boot, Black CT4470-0 1
USB Power Cord (1 m)
(USB-A to USB-C)
Power Adapter, N.A. Plugs USB Jack
Input: 100-240 Vac, 50/60 Hz
Output: 5 Vdc, 1 A
UL Listed
CT4386 1
CT4473-100 1
CT4471 1
EU Plug Converter
(NA to EU Plugs)
Batteries, AA – 4
14 CT4447 Series High-Voltage Differential Probes User Manual
CT4472 1
Page 15
Setting Up and Using the Probe
Before connecting the probe for your measurement, read all the warnings in this
WARNING
section and all of the warnings in the section “Safety Information” on page 8.
AVERTISSEMENT
Setting Up
1. To use this probe, rst insert the four AA batteries into the probe...
Avant de connecter la sonde pour votre mesure, lisez tous les avertissements de cette
section et tous les avertissements de la section « Informations de sécurité » à la page
8.
Remove protective
rubber boot to access
battery cover
2. OR, connect the USB power cord to the probe (see Figure 1 for the location of the input jack on the
probe) and a USB port on the oscilloscope or to the Power Adapter plugged into a mains circuit.
Remove battery
cover screw
Slide battery cover
off to access
compartment
Using
3. Connect the Insulated BNC male output connector to an input channel of the oscilloscope.
The Probe Must be Grounded.
WARNING
Before making connections to the input leads of the probe, ensure that the output
BNC connector is attached to the BNC input channel of the oscilloscope AND the
oscilloscope is properly grounded.
AVERTISSEMENT
La sonde doit être mise à la terre.
Avant d’effectuer les connexions aux ls d’entrée de la sonde, assurez-vous que le
connecteur BNC de sortie est connecté au canal d’entrée BNC de l’oscilloscope ET
que l’oscilloscope est correctement mis à la terre.
4. Select the desired attenuation ratio, 10x or 100x (CT4447-1); 20x or 200x (CT4447-2), via the
attenuation selection button.
5. Turn off the high voltage source.
6. Press the probe hooks on its matching color 4 mm sheathed banana plug input lead.
7. Connect the probe hooks to the circuit under test.
To protect against electric shock, use only the probe hooks supplied with this probe.
WARNING
AVERTISSEMENT
Pour vous protéger contre les chocs électriques, utilisez uniquement les crochets de
sonde fournis avec cette sonde.
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8. After conrming that the probe operator is not touching the device under test, turn on the high-voltage source.
9. Measure the voltage under test and observe the waveform on the oscilloscope.
Remember the actual voltage is the attenuation factor greater than the oscilloscope
WARNING
waveform.
AVERTISSEMENT
N’oubliez pas que la tension réelle est le facteur d’atténuation supérieur à la forme
d’onde de l’oscilloscope.
10. Turn off high voltage source.
11. Disconnect the probe inputs from the high-voltage source.
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Specications & Characteristics
The probe and oscilloscope should be warmed up for at least 20 minutes before any testing and the
environmental conditions should not exceed the probe’s specied limits.
All entries included in the following tables are characteristics unless otherwise stated.
NOTE
REMARQUE
Table 3 Safety Specications
Parameter Condition
IEC/EN 61010-031:2015 Measurement Category III
Table 4 Electrical Specications (Not Warranted)
Parameter CT4447-1 CT4447-2
Bandwidth (-3 dB) 30 MHz 30 MHz
Gain Accuracy ±2% ±2%
Toutes les entrées incluses dans les tableaux suivants sont des caractéristiques, sauf
indication contraire.
Attenuation Ratio 10x / 100x 20x / 200x
Rise Time 14 ns 14 ns
Absolute Maximum Rated Input
Voltage (each side to ground)
Maximum Differential Input
Voltage (DC + AC Peak)
Maximum Common Mode Input
Voltage (DC + AC Peak)
Input Impedance
Output Voltage ±7 V (driving 1 MΩ load) ±7 V (driving 1 MΩ load)
Offset (typical) ±20 mV ±20 mV
Noise (typical) 0.7 mVrms 0.7 mVrms
CMRR (typical)
Power Requirements
Mains Adapter (N.A. Plugs)
1000 V CAT III 1000 V CAT III
±70 V at 10x
±700 V at 100x
±70 V at 10x
±700 V at 100x
5 MΩ, 2 pF (each side to
ground)
50 Hz: -72 dB
20 kHz: -66 dB
200 kHz: -56 dB
4 x AA batteries or
USB-C cable
Input:100-240 V AC, 0.35 A
Output: 5 V DC, 1 A
±140 V at 20x
±1400 V at 200x
±140 V at 20x
±1400 V at 200x
5 MΩ, 2 pF (each side to
ground)
50 Hz: -72 dB
20 kHz: -66 dB
200 kHz: -56 dB
4 x AA batteries or
USB-C cable
Input:100-240 V AC, 0.35 A
Output: 5 V DC, 1 A
17CT4447 Series High-Voltage Differential Probes User Manual
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Table 5 Mechanical Specications (same for both versions)
Parameter Characteristic
Input Leads Length (each) 55 cm ±3 cm
BNC Cable Length 95 cm ±3 cm
Dimension (L x W x H) 220 mm, 68 mm, 28 mm (with protective rubber boot)
Weight 488 g (1.08 lb) (with batteries and protective rubber boot)
USB Type C Cable Length 100 cm ±3 cm
Table 6 Environmental Specications (same for both versions)
Parameter Characteristic
Operating Temperature -10°C to 40°C (14°F to 104°F)
Storage Temperature -30°C to 70°C (-22°F to 158°F)
Humidity ≤ 80% RH @ 25°C to 35°C (77°F to 95°F)
Altitude
Pollution Degree P2
Operating: 2000 m
Non-operating: 15000 m
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Performance Plots
Figure 3 Rise Time
10x attenuation, 10%-90%
Figure 4 Rise Time
100x attenuation, 10%-90%
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Page 20
TEK_SCOPE 10 Jan 2022 13:17:33
TEK_SCOPE 10 Jan 2022 13:20:17
Figure 5 Rise Time
20x attenuation, 10%-90%
Figure 6 Rise Time
200x attenuation, 10%-90%
20 CT4447 Series High-Voltage Differential Probes User Manual
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2,000
1,000
100
1 10
Frequency (MHz)
Figure 12 Typical Voltage Derating
Typical derating plog of the absolute maximum input voltage in commond mode
100
21CT4447 Series High-Voltage Differential Probes User Manual
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Performance Verication
Required Equipment
The follow procedures can be used to test the differential gain accuracy and rise time. Please note that
these procedures do not indicate that the characteristics are warranted. They are meant to indicate the
probe is functioning properly.
Allow the probe to warm up at least 20 minutes.
NOTE
REMARQUE
Table 7 Required Test Equipment
Description Minimum Requirements Recommended Product
Oscilloscope Bandwidth: ≥ 500 MHz, 1 MΩ/50Ω selectable inputs Tektronix TDS3052B
Generator/Calibrator ≥ 20 V variable amplitude, 100 Hz square wave, calibrated Fluke 5522A
Pulse Generator ≥ 50 V, 200 ns, ≤ 500 ps RT Avtech AVR E2-B
Digital Multimeter (DMM) 100 mV and 1 V True RMS AC ranges, <±0.3% Accuracy B&K 5492C
Coax cable BNC male to BNC male, 50Ω, 1 m (2) Cal Test CT4098-100
Adapter BNC female to 4 mm double banana plugs Cal Test CT2939
Laisser la sonde se réchauffer au moins 20 minutes.
Adapter BNC female to SMA male Cal Test CT3316
Adapter BNC female to female Cal Test CT2765
Adapter BNC male to 4 mm double sheathed banana jacks Cal Test CT2412
Adapter 4 mm banana plug to jack, pair (black & red) Cal Test CT3089
Terminator BNC male to female feed-thru, 50Ω Cal Test CT2944C-50
Attenuator BNC male to female, 50Ω, 6 dB (2x) Cal Test CT3369A-06
22 CT4447 Series High-Voltage Differential Probes User Manual
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Test Procedures
Test Setup
1. Turn on the oscilloscope.
2. Connect the probe to any channel on the oscilloscope (for warm-up).
It is recommended to operate the probe using USB power during verication testing.
NOTE
REMARQUE
3. Connect the USB cable’s to the probe’s USB-C power input jack and the AC power adapter to to
the cable’s USB-A connector. Plug the AC adapter into mains line voltage.
4. Turn on the probe and verify the LED lights.
5. Turn on the remaining test equipment and let the probe and equipment warm up for a minimum of
20 minutes.
Il est recommandé d’utiliser la sonde en utilisant l’alimentation USB pendant les tests
de vérication.
23CT4447 Series High-Voltage Differential Probes User Manual
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Gain Accuracy
Differential Probe
GA01-A-451043001
Dangerous voltages will be present on the generator/calibrator output terminals and
WARNING
connection cables. Always verify that the generator/calibrator is in the standby mode
before you make any connections to the generator.
AVERTISSEMENT
1. Verify that the generator/calibrator output is in standby.
2. Connect the probe output directly to the DMM through the BNC female to 4 mm double banana
plugs adapter.
Des tensions dangereuses seront présentes sur les bornes de sortie du générateur/
calibrateur et les câbles de connexion. Vériez toujours que le générateur/calibrateur
est en mode veille avant d’effectuer des connexions au générateur.
DMM
2
BNC f to double
banana plugs
4 mm banana
plug to jack
1
3
Generator/Calibrator
3. Connect the probe’s input leads to the generator/calibrator outputs using banana plug adapters.
4. Set the DMM to AC volts.
5. Set the probe’s attenuation range and the generator/calibrator to square wave output, frequency
and RMS voltage to the values show in “Table 8 Gain Accuracy Equipment Setting” on page 24,
for the probe being tested.
6. Enable the generator/calibrator output and record the probe output (as displayed on the DMM) in
the table.
7. Place the generator/calibrator output in standby.
8. Set the probe attenuation to the next range and repeat steps 5 through 8.
Table 8 Gain Accuracy Equipment Setting
Probe Generator/Calibrator Probe Output
Model Range Voltage Frequency Expected (rms) Measured (rms)
CT4447-1 10x 10 Vrms 100 Hz 1000 mV ±20 mV
CT4447-1 100x 30 Vrms 100 Hz 300 mV ±6 mV
CT4447-2 20x 20 Vrms 100 Hz 1000 mV ±20 mV
CT4447-2 200x 60 Vrms 100 Hz 300 mV ±6 mV
24 CT4447 Series High-Voltage Differential Probes User Manual
Page 25
Rise Time
RT01-A-451043001
1. Verify that the pulse generator output is off and then connect the probe to the oscilloscope input
channel.
2. Connect the probe inputs, through the adapters shown below, to the pulse generator output. Set
the probe input leads straight and parallel for best signal response.
Pulse Generator
Sync Out
4
BNC 6dB (2x)
Attenuator
BNC f-f
Out
SMA m to
BNC f
2
BNC cable
Oscilloscope
5
1 Trig In
6
Differential Probe
1
3
BNC cable
BNC m to double
banana jacks
BNC 50Ω Feed-thru
Terminator
3. Connect pulse generator output trigger to oscilloscope trigger input.
4. Set the output of the pulse generator to 50 V, 1 kHz, and 200 ns pulse output. Note: the probe input
voltage will be 25 V due to the 6 dB (2x) attenuator in the circuit.
5. Set the oscilloscope to 5 V/div, 10 ns/div, BW = full, average = 16.
6. Set the probe attenuation to the rst range listed in the table below.
7. Enable the pulse generator output and check that the rise time does not exceed the target rise time
value listed in the table. Use the auto-measure feature of the oscilloscope to determine the rise
time.
8. Record the rise time in the table.
9. Set the probe attenuation to the next range and adjust the vertical volts/div to display the signal.
10. Record the rise time in the table and disable the pulse generator output.
Table 9 Rise Time Test Equipment Settings
Probe Pulse Generator Output Probe Output
Model Range Voltage Frequency Expected (ns) Measured (ns)
CT4447-1 10x 50 V 1 kHz 11.7 ns
CT4447-1 100x 50 V 1 kHz 11.7 ns
CT4447-2 20x 50 V 1 kHz 11.7 ns
CT4447-2 200x 50 V 1 kHz 11.7 ns
25CT4447 Series High-Voltage Differential Probes User Manual
Page 26
Cleaning
Clean only the exterior probe body and cables. Use a soft cotton cloth light moistened with a mild
solution of detergent and water. Do not allow any portion of the probe to be submerged at any time.
Dry the probe thoroughly before attempting to make voltage measurements.
WARNING
AVERTISSEMENT
Do not subject the probe to solvents or solvent fumes as these can cause deterioration
CAUTION
MISE EN GARDE
Séchez soigneusement la sonde avant d’essayer d’effectuer des mesures de tension.
of the probe body and cables.
Ne soumettez pas la sonde à des solvants ou à des vapeurs de solvants car ceux-ci
peuvent détériorer le corps de la sonde et les câbles.
26 CT4447 Series High-Voltage Differential Probes User Manual
Page 27
China RoHS 2
Hazardous Substances Disclosure Table
China RoHS 2 refers to the Ministry of Industry and Information Technology Order No.
中國 RoHS 2 指工業和信息化部令第 32 號，自 2015 年 7 月 1 日起生效，題為《電氣電子產品有害物質限制使用管
理辦法》。為符合中國 RoHS 2，我們根據電子電氣產品有害物質限制使用標誌 SJT 11364 將本產品的環保使用期限
(EPUP) 確定為 25 年。
Part Name
零件名稱
32, effective July 1, 2015, titled Management Methods for the Restriction of the Use
of Hazardous Substances in Electrical and Electronic Products. To comply with China
RoHS 2, we determined this product’s Environmental Protection Use Period (EPUP)
to be 25 years in accordance with the Marking for the Restricted Use of Hazardous
Substances in Electronic and Electrical Products, SJT 11364.
Hazardous Substance 有害物質
Lead
(Pb)
鉛
Mercury
(Hg)
汞
Cadmium
(Cd)
鎘
Hexavalent
Chromium
(Cr (VI))
六價鉻
Polybrominated
biphenyls (PBB)
多溴聯苯
Polybrominated
diphenyl ethers
(PBDE)
多溴二苯醚
Printed Circuit Board Assemblies
印刷電路板組件
Electrical Components
電氣元件
Metal Components
金屬部件
Plastic Components
塑料部件
This table is made per guidance of SJ/T 11364.
該表是根據 SJ/T 11364 的指南製作的。
O: Indicates that this hazardous substance contained in all of the homogeneous materials for the part is below the
limit requirement in GB/T 26572.
O: 表示該有害物質在該部件的所有均質材料中的含量低於 GB/T 26572 中的限量要求。
X: Indicates that this hazardous substance contained in at least one of the homogeneous materials used for this
part is above the limit requirement in GB/T 26572.
X: 表示該有害物質在用於該部件的至少一種均質材料中的含量高於 GB/T 26572 中的限量要求。
x o o o o o
x o o o o o
x o o o o o
o o o o o o
27CT4447 Series High-Voltage Differential Probes User Manual
Page 28
© Cal Test Electronics, Inc.
Electronic Format Only
Manual Part Number: 451-043-001
Revision: D
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