xx
P5122 100X Probe
The P5122 Probe is a high voltage probe with 100X
attenuation and a compensation range of 10 to 25 pF.
The probe is designed for use with Tektronix TPS2000
and THS3000 series
fl
oating oscilloscopes with high
input impedance (1 M
Ω
). The probe has no user- or
Tektronix-serviceable parts.
WARNING.
The reference contact ring (see below) is
always the same voltage as the reference lead. To avoid
arc
fl
ash, always ensure the insulation sleeve or hook
tip is installed to cover the reference contact ring.
Connecting the Probe to the Oscilloscope
Connect the probe as shown in the illustrations below.
Compensating the Probe
Due to variations in oscilloscope input characteristics,
the low-frequency compensation of the probe may need
adjustment after moving the probe from one oscilloscope
channel to another.
If a 1 kHz calibrated square wave displayed at 1 ms/division
shows signi
fi
cant differences between the leading and
trailing edges, perform the following steps to optimize
low-frequency compensation:
1.
Connect the probe to the oscilloscope channel that you
plan to use for your measurements.
2.
Connect the probe to the probe compensation output
terminals on the oscilloscope front panel.
WARNING.
To avoid electric shock, only connect to the
Probe Comp signal on the oscilloscope when making
this adjustment.
3.
Depress the locking pin inside the protective sleeve.
4.
Turn the sleeve and the cable end until the adjustment
is visible through the opening.
5.
Push AUTOSET or otherwise adjust your oscilloscope
to display a stable waveform.
6.
Adjust the trimmer in the probe until you see a perfectly
fl
at-top square wave on the display. (See illustration.)
WARNING.
To avoid electric shock, only use the
insulated adjustment tool when making compensation
adjustments.
7.
Turn the sleeve back and lock the sleeve in place.
WARNING.
To avoid electric shock, ensure that the
sleeve is locked in the closed position after making
compensation adjustments.
Connecting the Probe to the Circuit
Use the standard accessories included with the probe to
connect to your circuit. (See Table 1.)
WARNING.
To avoid electric shock when using the probe
or accessories, keep
fi
ngers behind the
fi
nger guard of
probe body & accessories (as shown).
To reduce risk of shock, when using the probe on
fl
oating
measurements, ensure the reference lead accessories are
fully mated before connecting the probe to the circuit
under test.
Standard Accessories
The standard accessories included with the probe can be
reordered as a kit. The kit includes one of each item shown
below. Order Tektronix part number 020-3046-00.
Table 1: Probe accessories kit
Item
Description
Hook tip
1. Press onto
probe tip
2. Squeeze the
hook tip to extend
the conductive
hook
3. Clamp hook
onto conductor
Reference lead,
with hook clip
1. Secure lead to
probe head ground
pin
2. Connect hook
clip to circuit
reference
Reference
lead, with
mini-alligator clip
1. Secure lead to
probe head ground
pin
2. Squeeze clip
and connect to
circuit reference
CAUTION.
This accessory is rated 30 VAC
maximum. Do not use for MAINS connection.
Ground spring
for probe tip
1. Press onto
probe tip
2. Probe circuits
with nearby
reference test
points
Adjustment tool
Use only this
insulated tool for
compensation
adjustments
P5122
200 MHz 100X High Voltage Probe
Instructions
x
*P071272003*
071-2720-03
