Snap-On Zeus, Руководство пользователя

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Scope and Multimeter Operations Control Panel and Settings
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9.9.6 Peak Detect Icon
Peak Detect allows you to maximize the signal sampling rate in order to
capture fast events, such as spikes, glitches and other anomalies, that
may normally be undetected.
Peak Detect Off
When peak detect is off, the scope samples at a high rate but saves just enough
sample points to the data buffer memory to plot a waveform across the screen. No
preference is given to any point during the selection process.
NOTES
— Turning peak detect “off” is suitable for basic measurements, and viewing
waveforms (e.g. oxygen (O2) or Cam sensor) when capturing fast events is
not necessary.
— The longer the time sweep, the greater the chance a glitch could be missed
because it occurred in between the sample points saved to the data buffer
memory. To increase the chance of capturing a glitch with peak detect “off”, a
shorter time sweep should be selected.
— Turning peak detect “off” avoids the need for an external filter to decrease
the display of unwanted noise, which can make diagnosis more difficult.
Example: With a time sweep of 10 seconds on a screen 100 points wide, the
effective sample rate would be 10 times a second. Decreasing the time sweep
to 1 second, increases the effective sample rate to 100 times a second. At this
time setting, a fast occurring event is more likely to be captured due to the
increased rate. This is the standard mode of operation for many scopes.
Peak Detect On
When peak detect is “on”, all sample points are evaluated. The points stored to the
data buffer memory are intelligently selected to capture fast events that might be
missed at slower effective sample rates. Peak Detect captures fast events, spikes
and glitches for signals going in both positive and negative directions.
NOTES
— Turn peak detect "on" when capturing fast events (e.g. ignition firing
voltage, glitches, and intermittent events).
— Turning peak detect “on” may capture unwanted noise, therefore, using
peak detect may not be suitable for some tests (e.g. oxygen (O2) sensor), as
the waveform may be more difficult to evaluate due to the additional noise that
may be displayed.
— Peak Detect decreases the possibility of waveform aliasing.
Probe “test” Options
Menu Option Probe / Device Used
Test Lead - Volts DC
Standard Channels 1 to 4 test leads with
alligator clips or test probes
Vacuum 100
(optional) 0-100 psi pressure transducer
with pressure adapter
Pressure 100
Pressure 500
(optional) 0-500 psi pressure transducer
with pressure adapter
Pressure 5000
(optional) 0-5000 psi pressure transducer
with pressure adapter
Low Amps 20
(optional) Low Amp Probe Low Amps 40
Low Amps 60
Ignition
(optional) Secondary ignition adapter lead
with desired secondary ignition coil adapter
Peak Detect Icons (Typical)
On (Sampling maximized) Off (Sampling not maximized)