DP120 Fluke Electronics, DP120 Datasheet
DP120
Manufacturer Part Number
DP120
Description
PROBE VOLTAGE DIFFERENTIAL
Manufacturer
Fluke Electronics
Type
Voltage Probe, Differentialr
Datasheet
1.DP120.pdf
(2 pages)
Specifications of DP120
Includes
Alligator Clips, Battery, Pin-Grabber Test Clips
Attenuation Value
20:1, 200:1
Bandwidth
20MHz
Resistance - Input
1M
Voltage - Max
CAT III 600V, CAT II 1000V
Capacitance - Input
50pF
Cable Length
60.000" (1524.00mm)
Color
Gray
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
614-1104
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
DP120
Manufacturer:
TI/德州仪器
Quantity:
20 000
Company:
Part Number:
DP1205C433LF
Manufacturer:
MOLEX
Quantity:
5 000
Introducing the DP120
The DP120 is a safety designed differential voltage probe for
floating high voltage measurements. The probe can be used on
electronic high-power converters, motor speed controls, switch
mode power supplies, and other high voltage circuits.
Unpacking
Check that the following items are included with the DP120:
This Fluke product will be free from defects in material and
workmanship for one year from the date of purchase. This warranty
does not cover fuses, disposable batteries or damage from
accident, neglect, misuse or abnormal conditions of operation or
handling. Resellers are not authorized to extend any other warranty
on Fluke’s behalf. To obtain service during the warranty period,
send your defective product to the nearest Fluke Authorized
Service Center with a description of the problem.
THIS WARRANTY IS YOUR ONLY REMEDY. NO OTHER
WARRANTIES, SUCH AS FITNESS FOR A PARTICULAR
PURPOSE, ARE EXPRESSED OR IMPLIED. FLUKE IS NOT
LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
CONSEQUENTIAL DAMAGES OR LOSSES, ARISING FROM
ANY CAUSE OR THEORY.
Since some states or countries do not allow the exclusion or
limitation of an implied warranty or of incidental or consequential
damages, this limitation of liability may not apply to you.
April 1997, Rev. 5, 4/99
© 1997, 1999 Fluke Corporation
All rights reserved.
Printed in the Netherlands
All product names are trademarks of their respective companies.
Fluke Corporation
P.O. Box 9090
Everett WA
98206-9090, USA
DP120 - Differential Voltage Probe
AC85A - Large Jaw Alligator Clips (red and black)
AC83 - Pin-Grabber Test Clips (red and black)
9V Alkaline Battery
LIMITED WARRANTY & LIMITATION OF LIABILITY
Differential Voltage Probe
Fluke Industrial B.V.
P.O. Box 680
7600 AR Almelo
The Netherlands
Instruction Sheet
DP120
®
Using the DP120 Safely
In this manual a Warning identifies conditions and actions that
pose hazards to the user. Symbols used on the DP120 and in this
instruction sheet are explained in the next table.
Powering the DP120
Follow the procedure (steps 1 to 3) to power the probe from a
standard ac outlet.
The power adapter is optional. For available Power Adapter
models, see the section ‘Servicing the DP120’.
Storing the DP120
If you are storing the differential voltage probe for an extended
period of time, the battery should be removed and stored
separately.
Do the following to avoid electrical shock or fire if the
probe is connected to more than 42V peak (30V rms):
Use only Fluke power adapter, model PM8907
(option).
Connect the power adapter to the AC outlet
before connecting it to the DP120.
Do not insert metal objects in the power adapter
connector.
Use 600V rated test lead adapters. The maximum
allowable input voltage is 600V, Category III.
See explanation in
manual
Double Insulation
(Protection class)
Warning
Conformité
Européenne
UL3111 listed
Recycle
Using the DP120
To use the differential voltage probe, do the following:
Measurement tips:
Use the 20x range on the differential voltage probe for smaller
signals, such as ripple on a high voltage reference lead.
At 20x range, set the test tool range to 20:1 (or 10:1).
When the probe is battery operated, the red LED indicates
that the battery level is low and the battery needs to be
replaced.
When battery operated, the probe automatically goes to
standby mode after 30 minutes to conserve battery power. A
blinking green LED indicates that the probe is in standby
mode. To continue operation, turn the range selection switch
from OFF to 20x or 200x.
Connect the red probe cable to a higher voltage level than the
black probe cable.
For a dual measurement on test tool inputs A and B, connect
the common to earth ground. This ensures optimal
measurement accuracy on all inputs. For operating and
grounding principles of the differential voltage probe, see the
next figure.
Connect the probe’s output cable to the desired input on
the test tool. For Fluke 123, use the black banana-to-
BNC adapter (BB120).
On the probe, select the 200x range. Ensure that the
green POWER ON-indicator is lit.
On the test tool, ensure that the probe correction is set to
200:1. If not available, set to 100:1.
Connect both probe inputs to the measuring points.
When the test tool is not in auto range, adjust the vertical
range for optimal display.
When using the 100:1 probe correction, multiply the
voltage reading on the screen by 2x.
At completion, be sure to set the range selection switch
to OFF again.
Application of Testing an Adjustable
Speed Drive Timing Circuit
One of the tasks of the control circuitry in an adjustable speed drive
(ASD) is timing of the output inverter switching. The voltage
waveform of the pulse width modulated (PWM) output inverter is a
series of pulses of constant magnitude (height), but varying width.
The control circuitry manages the timing of these pulses.
When one of the stages of the output inverter does not function
properly, check the following:
The figure below shows how to connect a ScopeMeter test tool
and a DP120 to the circuitry.
Note that the timing circuit for the FET (Field Effect Transistor)
drive is referenced to earth ground. The gate drive signal is isolated
with a transformer coupling to the FET, which is connected to the
DC-voltage.
An example of comparing the timing signal to the signal at the drive
output can be seen in the screen below.
the output stage
the control circuitry
DCVOLTAGE
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TOMOTOR
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DP120 Summary of contents
Page 1
... Using the DP120 Safely ® In this manual a Warning identifies conditions and actions that pose hazards to the user. Symbols used on the DP120 and in this instruction sheet are explained in the next table. DP120 Differential Voltage Probe Instruction Sheet Introducing the DP120 The DP120 is a safety designed differential voltage probe for floating high voltage measurements ...
Page 2
... Max. Floating Output Voltage: 200x: @60Hz= >80 dB, @1 MHz= >50 dB 20x: @60Hz= >70 dB, @1 MHz= >40 dB 600V Category III 400 Hz. (From shielding to ground.) The DP120 conforms with the EEC directive 89/336 for EMC immunity, as defined by IEC801-3, with the addition of the following , 6 pF tables. ...