Datasheet

Datasheet
Four Isola
tedChannel™ inputs and isolated external trigger input for quick, accurate,
affordabl
e floating and differential measurements.
Make Floating and Differential Measurements –
Quickly, Accurately, Affordably
Unintentionally grounding a circuit under test is a common cause of
poor measurement results and circuit damage. Connecting two or more
grounded probes can cause ground loops, and if the current is high enough
can resul
t in ruined components and equipment. Most importantly, taking
floating m easurements w ithout the pro per instruments and probes can pose
a safety hazard.
Tektronix IsolatedChannel technology simplifies floating measurement s.
Unlike ground-referenced oscilloscopes, the TPS2 000B input connector
shells are isolated from each other and from e arth ground. Within the
specified 600 V
RMS
maximum float voltage, Iso latedChannel tech nology
keeps current from flowing between th e T PS2000B input BNC sh ells or
from any
BNC shell to earth.
Input signal and float voltage maximum safety ratings.
Different passive probes are available, depending on your application.
With the included TPP0101/TPP0201 passive probes, the TPS2000 B
can measure up to 400 V
p-p
. However, to meet the safety rating of the
TPP0101/TPP0201, the reference lead of the probe must be maintained
within 30 V
RMS
relative to ground. Because of this, the TPP0101/TPP0201
probes are well suited for working on digital and analog circuits in which the
maximum voltage never exceeds 30 V
RMS
.
Measurements on power conversion e lectronics usually require probes with
higher voltage ratings. Tektronix offers two passive probes with insulation
systems specifically designed for making floating measurements. Optional
P5122 probes, when coupled with the TPS2000B, are suitable for making
measurements on 480 V
RMS
devices in Category II environments, w ith a
maximum float voltage of up to 600 V
RMS
relative to earth ground. With the
optional P5120 probe the TPS2000B can measure up to 800 V
p-p
,witha
maximum float voltage within 600 V
RMS
of ground. With the optional P5120
probe the TPS2000B can measure u p to 8 00 V
p-p
with a maximum float
voltage within 600 V
RMS
of ground. T he P5120 is the best choice for making
AC-coupled ripple measurements on high-voltage DC power supplies.
Please s
ee “Characteristics” for complete safety ratings and specifications.
Selecting the Right Probes for the Job
Maximum Safety Ratings TPS2000B Viewable SignalScope/Probe (Attenuation)
Reference Flo at S a fety
Rating*
1
Input Sign al Safety Rating On-screen Peak-Peak
Voltage (Sinusoid centered
at 0 V)
On-screen RMS Voltage
(Sinusoidcenteredat0V)
TPS2000B Input (1X) 600 V
RMS
CAT II 300 V
RMS
CAT II
40 V
p-p
14.1 V
RMS
TPP0101 (100 MHz)
TPP0201 (200 MHz)
30 V
RMS
300 V
RMS
CAT II
400 V
p-p
141 V
RMS
P5120 (20X) 600 V
RMS
CAT II 1000 V
RMS
CAT II
800 V
p-p
282 V
RMS
P5122*
2
(100X) 600 V
RMS
CAT II 1000 V
RMS
CAT II
2828 V
p-p
1000 V
RMS
*
1
Passive probe reference leads have no attenuation so any working voltage or over-voltage transients pass straight through to the scope reference. Thus, a passive probe reference float rating can never exceed the scope
reference float rating.
*
2
The P5122 probe should not be used for AC-coupled measurements on signals with greater than 300 V DC offset. The P5120 is the recommended probe for measuring ripple on high-voltage DC supplies.
2 www.tektronix.com