Cal Test CT4196 User Manual

!

600V

CAT III

INPUT

65V

!

MAX

600V

CAT III

Over

Range

1x

5x

10x

OFF

POWER

±35 V±18 V @ 5x

Dierential Mode Common Mode

±35 V @ 10x

DC+AC peak

±3.5 V @ 1x

CT4196

60 MHz Dierential Probe

OUTPUT

≤ ± 8V

INTO 1MΩ

EXT.SUPPLY

9V

200mA MAX

CT4196

User Manual

Cal Test Electronics

CT4196 Differential Probe User’s Manual

© 2018 Cal Test Electronics. All rights reserved.

Unauthorized duplication of Cal Test Electronics documentation
materials is strictly prohibited. Customers are permitted to duplicate
and distribute Cal Test Electronics documentation for internal
educational purposes.

1 caltestelectronics.com 450888-001 Rev. A

Cal Test Electronics

Safety Summary

To avoid personal injury and/or product damage, review and comply with
the following safety precautions. These precautions apply to both operating
and maintenance personnel and must be followed during all phases of
operation, service, and repair of this probe.

A WARNING statement calls attention to an operating procedure,
practice, or condition, which, if not followed correctly, could result
in injury or death to personnel.

A CAUTION statement calls attention to an operating procedure,
practice, or condition, which, if not followed correctly, could result
in damage to or destruction of parts or the entire product.

Do Not Work Alone

Do not work alone when working with high voltages.

Inspect the Probe

Inspect the probe and accessories for cracks and frayed or broken leads
before each use. If defects or damages are noted, DO NOT USE the
probe.

Dry Conditions

Hands, shoes, oor, and work bench must be dry. Avoid making

measurements under humidity, dampness, or other environmental
conditions that might affect safety.

Do Not Remove the Probe’s Casing

Removal of the probe’s casing may expose you to electric shock. If
necessary, disconnect the inputs and outputs of the probe before opening
the case.

Hazardous Contact

To avoid injury, remove jewelry such as rings, watches, and other metallic
objects. Do not touch exposed connections and components when power
is present.

Unexpected Charges

Hazardous voltages may be present in unexpected locations in circuitry
being tested when a fault condition in the circuit exists.

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Capacitors inside the instrument may retain a charge even if the instrument
is disconnected from its source of supply.

Use Only in Ofce-Type Indoor Setting

The probe is designed to be used in ofce-type indoor environments. Do

not operate the probe:

z In the presence of noxious, corrosive, flammable fumes, gases,

vapors, chemicals, or finely-divided particulates.

z In environments where there is a danger of any liquid being

spilled on the probe.

z In air temperatures exceeding the specified operating

temperatures.

z In atmospheric pressures outside the specified altitude limits or

where the surrounding gas is not air.

Not for Critical Applications

This probe is not authorized for use in contact with the human body or for

use as a component in a life-support device or system.

Do Not Substitute Parts

Do not install substitute parts or perform any unauthorized modication to

the instrument.

Only Qualied Personnel

Only qualied personnel should use this probe. This differential voltage

probe is designed to be used by personnel who are trained, experienced,

or otherwise qualied to recognize hazardous situations and who are

trained in the safety precautions necessary to avoid possible injury when
using such a device.

Observe Maximum Working Voltage

Do not use any probe above its maximum working voltage ranges. See
“Electronic Characteristics” on page 11.

Use Proper Power Source

Do not operate this probe from a power source that applies more than the

voltage specied.

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Cal Test Electronics

Must be Grounded

This probe is grounded by the shell of the BNC connector through the
grounding conductor of the power cord of the measurement instrument.
Before making connections to the input leads of this probe, ensure
that the output BNC connector is attached to the BNC connector of the
measurement instrument, and that the measurement instrument is properly
grounded. Whenever it is likely that the ground protection is impaired,
you must make the instrument inoperative and secure it against any

unintended operation.

Compliance and Certications

CE Compliance

This product meets the essential requirements of the applicable European
Directives as follows:

z 2014/30/EU: Electromagnetic Directive (EMC)
z 2014/35/EU: Low-Voltage Directive (safety)
z 2011/65/EU: Restriction of Hazardous Substances Directive

(RoHS)

Electromagnetic Compatibility

This product meets the follow standard(s) of safety for electrical equipment
for measurement, control and laboratory use:

z IEC/EN 61326-1
z IEC/EN 55011

Safety

This product meets the follow standard(s) of safety for electrical equipment
for measurement, control and laboratory use:

z IEC/EN 61010-1

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Cal Test Electronics

Disposal of Old Electrical & Electronic Equipment

(Applicable in the European Union and other European
countries with separate collection systems). 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 and

otherwise observe all applicable requirements.

Terms and Symbols

The following symbols may appear on the product or in its documentation:

Direct current

5 caltestelectronics.com 450888-001 Rev. A

Both direct and alternating current

Caution, possibility of electric shock

Caution, see documentation for details

Double or reinforced insulation

Earth ground

Cal Test Electronics

Denitions

MEASUREMENT CATEGORY - classication of testing and measuring

circuits according to the types of mains circuits to which they are intended
to be connected.

MEASUREMENT CATEGORY II (CAT II) - measuring circuits
connected directly to utilization points of the low-voltage mains

installation

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 - only non-conductive pollution occurs except

that occasionally a temporary conductivity caused by condensation is
expected.

Working CAT rating is equal to that of the lowest rated element
within the test set-up.

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Cal Test Electronics

Introduction

Overview

The CT4196 differential probe allows safe, accurate measurement
between two voltage points where neither point is referenced to
ground. Designed for high sensitivity measurements, the probe offers
up to 60 MHz bandwidth. Compatible with oscilloscopes from all major

manufacturers, the probe is exclusively powered by the included 9 V

power adapter.

Features

z Meets IEC 61010-1 safety standard
z Selectable attenuation settings of 1x, 5x, and 10x
z 60 MHz bandwidth (at 10x attenuation setting)
z 50 MHz (at 5x attenuation setting)
z 15 MHz (at 1x attenuation setting)
z Up to ±35 V (DC + AC peak) common mode

z High accuracy (±2%)
z Power indicator LED
z Over range indicator LED

Initial Inspection

This unit is tested prior to shipment but an initial physical inspection
should be made to ensure that no damage has been sustained during
shipment. After the inspection, verify the contents of the shipment. The

included items for this product are:

z Differential probe
z (2) Pincer clips, black & red
z (2) Alligator clips, black & red
z (2) Sheathed 4 mm banana plug test leads, silicone jacketed,

black and red

z Insulated BNC cable, 100 cm
z 9 V power adapter
z User manual

7 caltestelectronics.com 450888-001 Rev. A

Product Overview

Probe Description

Test leads,

black and red

!

!

INPUT

65V

MAX

600V

CAT III

600V

CAT III

Over range

Indicator (Red)

Over

Range

1x

5x

10x

OFF

Dierential Mode Common Mode

±35 V @ 10x

POWER

±3.5 V @ 1x

±35 V±18 V @ 5x

DC+AC peak

CT4196

60 MHz Dierential Probe

Cal Test Electronics

Alligator Clips,

black and red

Attenuation

Selector Switch

External Power

OUTPUT

≤ ± 8V

INTO 1MΩ

EXT.SUPPLY

9V

200mA MAX

Connection

Power

Indicator (Red)

Pincer Clips,

black and red

Insulated BNC

Cable

Figure 1 CT4196: Front Panel Features

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Cal Test Electronics

Using the Probe

WARNING At the time of powering on the probe, the input

leads must not be connected to an item to be tested. Never
operate the probe with the case open.

CAUTION This probe is used to carry out differential mea-

surements between two points on the circuit under test. This
probe is not designed for electrically insulating the circuit
under test or the measuring instrument.

Getting Started

1. Connect the BNC output connector to the vertical input of a
general purposed oscilloscope. The oscilloscope must have a
ground referenced.

2. Connect power adapter.

3. Select the proper attenuation ratio. When measuring signals

below 3.5 V, switch the attenuation ratio to 1x. For voltages up
to 18 V, set the attenuation ratio to 5x and for voltages up to 35
V set the attenuation ratio to 10x.

4. The power indicator LED should turn on.

5. Plug the pincer or alligator clips onto the test leads and connect
the circuit under test.

Vertical Scale on Oscilloscope

The actual vertical scale of the oscilloscope is equal to the attenuation
factor multiplied by the range of vertical scale selected on the

oscilloscope. For example, with the probe on factor 10x and the
oscilloscope on 0.5 V/div, the real vertical scale is 10 x 0.5 = 5 V/
div. With the probe on 5x, the real vertical scale is 5 x 0.5 = 2.5 V/

div. These values apply when the oscilloscope is set to the typical 1

MΩ impedance input. When the scope is set to 50 Ω input, the actual
vertical scale will be doubled: 10 V/div for the 10x setting and 5 V/div

for the 5x setting. See the chart below.

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Cal Test Electronics

Vertical Scale on Oscilloscope

Scope Input

Impedance

1 MΩ 1x 1x 0.5 V/div 0.5 V/div

1 MΩ 5x 5x 0.5 V/div 2.5 V/div

1 MΩ 10x 10x 0.5 V/div 5 V/div

50 Ω 1x 2x 0.5 V/div 1 V/div

50 Ω 5x 10x 0.5 V/div 5 V/div

50 Ω 10x 20x 0.5 V/div 10 V/div

Table 1 Oscilloscope Readings

Probe

Attenuation

Setting

Actual

Attenuation

Setting

Vertical Scale

Reading on the

Oscilloscope

Actual Vertical

Scale of the

Oscilloscope

Cleaning

This probe does not require any particular cleaning. If necessary, clean
the case with a soft cloth.

WARNING

Dry the probe thoroughly before attempting to make voltage
measurements.

CAUTION

Avoid immersing or using abrasive cleaners or solvents
containing Benzene (or similar solvents) on the probe as
these can cause deterioration of the probe body and cables.

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Specications

All specications apply to the unit after a temperature stabilization time

of 20 minutes over an ambient range of 25°C ± 5°C.

Electrical Characteristics

Bandwidth

Rise Time

Attenuation

Accuracy ±2% *

AC CMRR

Maximum Input Voltage

Maximum Input Voltage

Maximum Input Voltage

Absolute Maximum Rated

Input Voltage (each side

Input Impedance (each

Output Voltage Swing

* Accuracy based on DMM with 10 MΩ input impedance.

(1x)

(DC + AC peak)

(5x)

(DC + AC peak)

(10x)

(DC + AC peak)

to ground)

Input Impedance

(Differential)

side to ground)

Offset (typical)

Noise (typical)

Source Impedance

Power Supply

±4 V (driving 1 MΩ oscilloscope input)

9 V power adapter (included)

60 MHz (10x attenuation)

50 MHz (5x attenuation)
15 MHz (1x attenuation)

5.8 ns for 10x
7 ns for 5x

23 ns for 1x

1x, 5x, 10x

80 dB @ 60 Hz

60 dB @ 100 Hz

50 dB @ 1 MHz

±3.5 V

±18 V

±35 V

600 Vrms

1 MΩ // 2.5 pF

0.5 MΩ // 5 pF

±5 mV

2 mVrms

50 Ω

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Mechanical Characteristics

Weight 250 g

Dimensions 195 x 55 x 30 mm

BNC Cable Length 100 cm

Input Leads Length 55 cm each

Environmental Characteristics

Operating Temp/Humidity

Storage Temp/Humidity

Pollution Degree Pollution Degree 2

0°C to 50°C / 10% to 85% RH

-30°C to 70°C / 10% to 90% RH

Safety Specications

IEC 61010-1 CAT II

Specications are subject to change without notice. To ensure the most current version of this

manual, please download the current version from our website: caltesetlectronics.com.

450888-001 Rev. A caltestelectronics.com 12

Cal Test Electronics

Volgage (DC+ACpeak)

Voltage Derating Curve

The derating curve of the absolute maximum input voltage in common
mode is shown as follows:

CT4196 Maximum Input Voltage Derating Curve

40

35

30

25

20

10

1KHz 1MHz 10MHz10KHz 100KHz 100MHz

Frequency

Figure 2 CT4196: Derating Curve

13 caltestelectronics.com 450888-001 Rev. A

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15

Cal Test Electronics

Service & Warranty Information

Limited One-Year Warranty

Cal Test Electronics warrants these products to be free from defective
material or workmanship for a period of 1 year from the date of original
purchase. Under this warranty, Cal Test Electronics is limited to
repairing the defective device when returned to the factory, shipping
charges prepaid, within the warranty period.

Units returned to Cal Test Electronics 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,
or that have been repaired by unauthorized persons, will not be
covered by this warranty.

Cal Test Electronics reserves the right to discontinue models, change

specications, 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 is authorized to assume any other obligation in connection
with the sale and purchase of this device.

Service

If you have a need for calibration or repair services, technical, or sales
support, please contact us:

22820 Savi Ranch Parkway

Yorba Linda, CA 92887

800-572-1028 or 714-221-9330

caltestelectronics.com

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