Cal Test Electronics CT4196 Bedienungsanleitung
CT4196
User Manual
!
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INPUT
EXT.SUPPLY
OUTPUT
65V
MAX
600V
CAT III
600V
≤ ± 8V
9V
200mA MAX
INTO 1MΩ
CAT III
Dierential Mode Common Mode
DC+AC peak
±35 V @ 10x
±35 V±18 V @ 5x
±3.5 V @ 1x
10x
OFF
POWER
Over
Range
5x
1x
CT4196
60 MHz Dierential Probe
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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 Ofce-Type Indoor Setting
The probe is designed to be used in ofce-type indoor environments. Do
not operate the probe:
zIn the presence of noxious, corrosive, flammable fumes, gases,
vapors, chemicals, or finely-divided particulates.
zIn environments where there is a danger of any liquid being
spilled on the probe.
zIn air temperatures exceeding the specified operating
temperatures.
zIn 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 modication to
the instrument.
Only Qualied Personnel
Only qualied personnel should use this probe. This differential voltage
probe is designed to be used by personnel who are trained, experienced,
or otherwise qualied 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 specied.
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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 Certications
CE Compliance
This product meets the essential requirements of the applicable European
Directives as follows:
z2014/30/EU: Electromagnetic Directive (EMC)
z2014/35/EU: Low-Voltage Directive (safety)
z2011/65/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:
zIEC/EN 61326-1
zIEC/EN 55011
Safety
This product meets the follow standard(s) of safety for electrical equipment
for measurement, control and laboratory use:
zIEC/EN 61010-1
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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
Both direct and alternating current
Caution, possibility of electric shock
Caution, see documentation for details
Double or reinforced insulation
Earth ground
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Denitions
MEASUREMENT CATEGORY - classication 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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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
zMeets IEC 61010-1 safety standard
zSelectable attenuation settings of 1x, 5x, and 10x
z60 MHz bandwidth (at 10x attenuation setting)
z50 MHz (at 5x attenuation setting)
z15 MHz (at 1x attenuation setting)
zUp to ±35 V (DC + AC peak) common mode
zHigh accuracy (±2%)
zPower indicator LED
zOver 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:
zDifferential 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
zInsulated BNC cable, 100 cm
z9 V power adapter
zUser manual
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Product Overview
Probe Description
!
!
INPUT
EXT.SUPPLY
OUTPUT
65V
MAX
600V
CAT III
600V
≤ ± 8V
9V
200mA MAX
INTO 1MΩ
CAT III
Dierential Mode Common Mode
DC+AC peak
±35 V @ 10x
±35 V±18 V @ 5x
±3.5 V @ 1x
10x
OFF
POWER
Over
Range
5x
1x
CT4196
60 MHz Dierential Probe
Pincer Clips,
black and red
Alligator Clips,
black and red
Insulated BNC
Cable
Test leads,
black and red
Figure 1 CT4196: Front Panel Features
Over range
Indicator (Red)
Power
Indicator (Red)
External Power
Connection
Attenuation
Selector Switch
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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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Vertical Scale on Oscilloscope
Scope Input
Impedance Probe
Attenuation
Setting
Actual
Attenuation
Setting
Vertical Scale
Reading on the
Oscilloscope
Actual Vertical
Scale of the
Oscilloscope
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
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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