Soft Mode; Crest Mode - Urrea UD337 Manual De Usuario

Press the pushbutton to enable the
continuity testing mode. This Meter
defaults in the 400Ωrange and then
highest bar graph scale shows 400.
The digital display reads OFL.
Continuity testing
circuit connections are intact. Test
resistances below 35Ω cause the
Meter to emit a continuous tone.
Input range
400 Ω
Table 1. Beeper Response in Continuity Test
The continuity mode is extremely
fast and can be used to detect either
shorts or opens that last for as little
as 100 milliseconds. When a change
is detected, the beeper tone is
"stretched" to last at least 1/4 second,
so you can hear it and detect both
shorts and opens.
This can be a valuable troubleshooting
aid when looking for intermittents
associated with cables connections,
switches, relays, etc. If the test
value is very close to the threshold,
erratic beeps can also occur due to
environmental electrical noise (EMI).
5.11 Using SOFT mode
Observe that SOFT is displayed after
pressing the SOFT CREST pushbutton
once.
This SOFT mode digitally displays a
running average of readings over
verifies that
Beeper ON if
Aprox. < 35Ω
E N G L I S H
3-second interval to reduce the
fluctuation of the readings. The bar
graph is unaffected by this SOFT
function and updates 20 times per
second.
SOFT function can be used for ampere
readings or voltage readings.
Press the SOFT-CREST pushbutton
twice when in the AC or DC amperes
mode, or once when in the voltage
mode, in order to exit SOFT.

5.12 CREST mode

Observe that PEAK is displayed after
pressing the SOFT-CREST pushbutton
twice. PEAK is available for AC
ampere readings only and can not be
selected when in the other modes.
Both the digital display and bar
graph measure the half-cycle peak AC
amperes when PEAK is displayed.
The crest factor of a waveform is the
ratio of its half-cycle peak amperes to
its rms amperes.
The Crest Factor is a nominal 1.414 for
linear current flow without current
wave distortion. Crest Factors other
than 1.414 indicate the presence of
harmonic current flow. (See 6.1 Non-
Linear Loads.)
Press the SOFT-CREST pushbutton
once to exit CREST. Then, PEAK is no
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