Operating Basics
10
Z-Active Differential Probe Family User Manual
Probe Calibration
After you perform a functional check of the probe, run a probe
calibration routine. Probe calibration minimizes measurement errors
by optimizing the gain and offset of the probe and oscilloscope
combination. We recommend that you repeat the probe calibration on
each channel that you use. Individual calibration constants are stored
for each probe on each channel.
After you calibrate and then disconnect the probe, there may be a
slight offset displayed on the screen. This slight offset occurs if you
leave the probe inputs open. The normal measurement configuration
is to calibrate the probe offset with a low source impedance. To
check offset calibration, short the probe tips together. When the
offset returns to zero, you have completed a successful probe
calibration.
CAUTION.
To avoid ESD damage to the probe, always use an
antistatic wrist strap (provided with your probe), and work at a
static-approved workstation when you handle the probe.
You can use the equipment shown in the
Functional Check
in
Figure 3 on page 5 to perform the probe calibration.
Test Procedure
The Calibration Status of the instrument Signal Path Compensation
test must be pass for the probe calibration routine to run:
1.
From the Utilities menu, select Instrument Calibration.
2.
In the Calibration box, check that the Status field is pass. If it is
not, disconnect all probes and signal sources from the oscillo-
scope, and run the Signal Path Compensation routine.
When the Signal Path compensation test status is pass, run the
following probe calibration routine:
3.
Connect the probe to one of the oscilloscope channels, and set the
oscilloscope to display the channel. Allow the probe to warm up
for 20 minutes.
