Springburo CLIPPER User manual

Operating Instructions
Version: 1
.3
CLIPPER
TEST PROBE
Clipper Test Probe Operating Instructions
P/N CLP1500V15 1 V1.3 Page 1
EN 61010-1:2010 Safety requirements for electrical equipment for
measurement, control and la oratory use – Part 031: Safety requirements
for handheld pro e assem lies for electrical measurement and test.
EU RoHS Compliance
The Pro es and it’s accessories conform to the 2011/65/EU RoHS2
Directive, as they have een classified as Industrial Monitoring and Control
Equipment (per Article 3, Paragraph 24).
General Safety Information
Because of its application area (the measurement of high voltages), it is
particularly important to read the connection instructions and safety
instructions listed elow.
EC Declaration of Conformity
The product is marked with this sym ol to indicate
that it conforms to the applica le European Union
requirements per Low Voltage Directive LVD
2006/95/EC. Compliance was demonstrated to the
following specification as listed in the Official
journal of the European Communities.
O serve generally accepted safety procedures in
addition to those listed here to avoid personal injury or
damage to equipment. The overall safety of any
system incorporating the Clipper Test Probe is the
responsibility of the person using the system

Clipper Test Probe Operating Instructions
P/N CLP1500V15 1 V1.3 Page 2
Connect & Disconnect Properly:
The Clipper Test Pro e has an “IN” and an “OUT” connection. The “IN” is to
e connected across the Vds or the Vce of the DUT (Device Under Test).
The “OUT” terminal is to e connected to an Oscilloscope using a 10X
Pro e. Connections must only e made when the DUT is switched off, and
it is certain that no residual charge (eg in capacitors) remains. Further
instructions follow.
High Voltage Warning:
The Clipper Test Pro e is designed to measure max continuous voltages of
1500V DC. Do not apply any voltage to the pro e greater than the A solute
Maximum Rating (1700V). Before switching on the device under test, make
sure there is no part of the ody within 30cm of the test area. Do not leave
the test area switched on and left unattended, switch off immediately after
making the tests.
Negative Voltage Warning:
The Clipper Test Pro e is designed to “clip” positive voltages only. It can
withstand negative voltages not exceeding -5V. Any DC Voltage less than
this could permanently damage the device. Therefore it is essential to take
care when connecting the inner “Positive” terminal to the “Drain” or
“Collector” of the DUT.
Grounding and Isolation:
The Clipper is a passive test pro e, with no isolation etween IN and OUT.
Under normal conditions, no voltages a ove 15VDC appear on the output
terminals, ut e aware that under fault conditions it may e possi le to
have the IN voltages present on the OUT and the Pro e must e handled
with this consideration. ALWAYS keep a safe distance etween the DUT and
the IN / OUT terminals efore powering on the DUT. Under NO
circumstances touch the Clipper OUT terminal when the Test is live.
Clipper Test Probe Operating Instructions
P/N CLP1500V15 1 V1.3 Page 3
Environment:
The Clipper is designed for La oratory use only. Do not use in wet or
explosive atmosphere.
Cleaning:
Do not immerse the unit in water. Use a soft moist cloth to clean surfaces.
The pro e must e completely dry efore use
OPERATION
Functional Description:
The Clipper Test Pro e allows the measurement of low voltage signals
( elow 12V) in the presence of high voltages (up to 1500VDC). Without the
Clipper, the Oscilloscope must either ut switched into a high-range (say
100V/Div) with corresponding low resolution, or can e put into a low-
range (say 2V/DIv) with input uffer overload effects and offsets eing
generated y the overdriven Oscilloscope input amplifiers.
The Transfer function can e written as:
If Vin >= 2V (LO Range)
V(out) = 2V
Else
V(out) = V(in)
If Vin >= 12V (HI Range)
V(out) = 12V
Else
V(out) = V(in)
No signal conditioning of the input signal is performed. Measurement
accuracy of the input signal is >98%. Settling time is around 100nS.

Clipper Test Probe Operating Instructions
P/N CLP1500V15 1 V1.3 Page 4
Applications
The Clipper is perfect for o serving the Rds(on) of a switched FET, or IGBT.
With an Oscilloscope set to 200mV /division, the sta ility of Rds(on) over a
range of say 200mΩ to 1Ω can e clearly seen in good resolution, while the
power transistor is switching.
More details and full specifications and application help can e found on
our We site: www springburo weebly com
Contents of Packing
The Clipper and accessories are delivered in an Aluminium case as shown in
Fig 1:
Accessory List (ref Fig 2):
Pos Type Spec Qty
1 SMA to SMA Male 12GHz, 50Ω 2
2 SMA BU P 50Ω 4
3 SMA BNC Plug 50Ω 1
4 SMA BNC Socket 50Ω 1
Clipper Test Probe Operating Instructions
P/N CLP1500V15 1 V1.3 Page 5
Fig 2: The accessories are provided to allow different connection
possi ilities.
Operating Details
Overview
The Clipper is operated as follows:
Firstly, make sure DUT is switched OFF !!
INPUT:
1: Connect Solder terminals to SMA
2: Solder +/- connections to DUT
3: Screw SMA onto Clipper using SMA to SMA adapter
OUTPUT:
4: Connect 10X scope pro e to BNC terminal of Clipper
5: Set Range switch to either HI (12V) or LO(2V).
6: Adjust Oscilloscope to correct sensitivity (e.g. 200mV or 2V/Div)
depending on Range setting.
7: If using current pro e, set Oscilloscope channel accordingly, and use
MATH function to display Rds(on) = Vds/Ids
8: Switch on DUT and o serve Rds(on)
1
2
3
4

Clipper Test Probe Operating Instructions
P/N CLP1500V15 1 V1.3 Page 6
INPUT
Using adapter Nr 2, a small twisted pair can e connected as shown in Fig3
elow.
The RED wire is positive, and must e connected to the more positive
voltage (usually the DRAIN or COLLECTOR) of the transistor eing tested,
and to the centre pin of the SMA Plug. The Black wire is the negative (or
Ground) return, and must e connected to the SOURCE or EMITTER, and to
the outer screen of the SMA Plug. (ref Fig 4 for circuit diagram):
Fig 3: Connection details for INPUT terminal
Note: Keep the connection wires as short as possi le to minimise inductive
effects such as ringing.
Central Pin:
Positive - DRAIN
Outer Shield
:
Return/GND - SOURCE
Clipper Test Probe Operating Instructions
P/N CLP1500V15 1 V1.3 Page 7
Fig 4: Electrical Diagram showing typical connection schematic.
Notes:
• Inclusion of a sense resistor in the circuit will reduce the accuracy
of the Clipper. Measurements must e made across the DRAIN &
SOURCE directly for est results.
• Current drawn y the clipper is a constant 350μA, independent of
Input Voltage.
• Keep connections short and twisted for est possi le frequency
response.
OUTPUT
The Output terminal of the CLIPPER is designed to connect directly to an
Oscilloscope pro e. It is recommended to use a 10X high impedance
pro e. This is ecause as the Clipper is a passive device (no external power
supply required) there is no active impedance uffering in the device. To
protect the device, a series 300Ω resistor is included, so when using a 50Ω
connection, there will e an error in voltages measured, caused y the
To Clipper
INPUT

Clipper Test Probe Operating Instructions
P/N CLP1500V15 1 V1.3 Page 8
potential divider effect. With a high impedance pro e, this effect is
negligi le.
A typical OUTPUT connection looks like this:
MODE SWITCH
Range Switch
The Range switch sets the actual clipping voltage.
LO Range: Maximum Output Voltage 2V (nominal)
HI Range: Maximum Output Voltage 12V (nominal)
Load current is not affected,
Repairs / Service / Calibration
For high voltage protection, the internal electronics is sealed with a potting
compound. There are no user servicea le parts inside, no repairs are
possi le.
Clipper Test Probe Operating Instructions
P/N CLP1500V15 1 V1.3 Page 9
Because of the unique “pass-through” design, there is no need to cali rate
the device.
IP Protection:
The Clipper design and intellectual property is protected with an
International Patent (pending at time of writing, July 2014).
Recycling:
The Clipper can e recycled with the normal electronic recycling systems.
There are no hazardous materials included (such as atteries or Lead).
Spring uro Gm H is registered with the ear-stiftung in Germany, which
regulates the recycling of consumer and Industry electronic products.
Registration Num er: DE 77429530

Clipper Test Probe Operating Instructions
P/N CLP1500V15 1 V1.3 Page 10
DISTRIBUTORS
The product is supported by trained field technicians in the following
regions:
Germany:
ADMESS Elektronik GmbH
Ernst-Kiefer Str 9
67292 Kirchheimbolanden
Tel: [phone]
www admess de
China & Hong Kong:
REVEL Electronics Co Ltd
Hong Kong
www revel com hk
Taiwan and Singapore
INDUSTRADE Co, Ltd
Taiwan
www industrade com tw
USA & Canada
SAELIG Company INC
www saelig com
UK & Ireland
IMEX Ltd
www imex co uk
Clipper Test Probe Operating Instructions
P/N CLP1500V15 1 V1.3 Page 11
Manufacturer:
Springburo GmbH
Theodor-Ludwig-Strasse 24
D-79312 Emmendingen
Germany
Tel: [phone]
www springburo org