User Manual

The AC crest factor of a non-sinusoidal wave decreases
linearly to about 1.8 at 6000 counts. The additional error
should be added for the corresponding crest factor as
follows:
a) Add 3% when crest factor is 1~2
b) Add 5% when crest factor is 2~2.5
4) Resistance
Accuracy
Resolution
Range
600.0Ω
6.000kΩ
60.00kΩ
600.0kΩ
6.000MΩ
60.00MΩ
0.1Ω
0.001kΩ
0.01kΩ
0.1kΩ
0.001MΩ
0.01MΩ
± (1.2%+2)
± (1.0%+2)
± (1.2%+2)
± (2.0%+5)
Measurement result = displayed value – resistance of
shorted test leads
Open circuit voltage: About 1V
Overload protection: 1000Vrms
Caution:
3）Continuity
Resolution
Range
600.0Ω 0.1Ω
Resistance <10Ω: Buzzer beeps
Resistance >100Ω: no beep
Remark
5) Audio/Visual alarm indicator
Status
< 12V (AC): Off
EFLo mode: Blinks in green
EFHI mode: Blinks in
yellow until it turns red
On, green
Off
<1000V: Off
≥1000V: On, red
<200A: Off
≥200A: On, red
Function
NCV
Continuity
AC/DC
voltage
Current
Description
No ACV signal
Weak ACV signal
Strong ACV signal
Continuity
Over range
Over range
X. Maintenance
Warning:
To avoid electric shock, make sure the test leads are
disconnected from the measured circuit before removing
the rear cover.
1. General Maintenance
1) Clean the meter casing with a soft cloth and mild detergent.
Do not use abrasives or solvents!
2) If there is any malfunction, stop using the meter and send
it for maintenance.
UT256A User Manual UT256A User Manual
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Open circuit