18 19
original accuracy in measuring low resistance, user can use it with assurance.
2 Power-off
Press key POWER to power-off after power-on.
After working 5 minutes, the LCD shall flicker continuously about 30seconds and
then power-off to reduce battery consumption. Press key POWER to delay power
-off, the clamp meter shall continue working.
Under the HOLD status, press key HOLD to exit the status and press key
POWER to power-off.
Under setting alarm critical value status, it is required to press key POWER or
key AL 3 seconds to exit the status and press key POWER to power off.
3 Resistance Measurement
If display OL after power-on self check, you can measure the resistance.
Pull the trigger and open clamp jaw, clamp the loop being measured to read the
resistance value.
Users are required to test by random test ring as shown in picture 5.
The displayed value should be the same with
standard value on the test ring (10.0 ), which
is the value under temperature 20 .it is normal
if there is a decimal difference between them,
for instance, standard value of the test ring is
10.0 ; the displayed value is 9.9 or 10.1 .
Display OL it means the resistance being
measured exceed the upper limit of clamp
meter, as shown in picture 2.
Picture 5
UT276A/278A OPERATING MANUALUT276A/278A OPERATING MANUAL
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