Measurement and instrumentation
Multimeter model UT70A
Réf:
291 034
ENGLISH
16
2) Make sure the insulation of the meter in good condition, no damage and
break before use.
3) Don’t use at all unless the back case is in place or there is danger of electric
shock.
4) Battery should be replaced to ensure an accurate measurement when " “
appears on LCD.
5) Set the Range Selector to a proper position.
6) The measured value shall not exceed the maximum range of each
measurement to protect the meter from damage and electric shock to user.
7) Range Selector shall not be switched during measurement to avoid damage
to the meter.
8) Cautions shall be taken to prevent electric shock when the measured
voltage is higher than 60V in DC or 42Vrms in AC.
9) Identical fuse shall be used when replacing the fuse:
•
5x20(mm) – F 0.5A 250V or
•
5x20(mm) – F 10A 250V
•
5x20(mm) – F 0.63A 250V
10) Avoid using the meter in a high temperature and high humidity condition,
the performance may deteriorate when the meter is dampened in a wet
condition in particular.
11) Please use test clips when measuring large size inductor and capacitor to
protect the multi-purpose socket from damage.
12) This digital multimeter is a precise instrument and its circuit and
potentiometer shall not be altered at will.
13) Soft cloth and mild detergent may be applied to clean the case for
maintenance of this meter while no abrasive or solvent shall be used.
14) Reset LC button, leaving LC circuit in Off mode, after a LC measurement
for comparatively large LC current.
4 Measurement
The sign (…) beside the input terminal indicates the maximum value that an
input voltage and current shall not exceed in order to protect the internal circuit
from damage. Red colour input jack and sign (…)
express High Voltage Input,
reminding you of cautious operation.
Please don't press down the "LC" functional button to reduce power
consumption when conducting measurement other than capacitance and
inductance.
Set Range Selector to your desired range before carrying out measurement.
Keep your test lead away from the measured point when changing over
function and range.
Some ranges cannot be reset due to the influence of input Impedance;
however, it shall not affect the accuracy of measurement.
4.1 DC Voltage Measurement (DV)
1) Insert red test lead into “V/
Ω
" jack and black test lead into "COM" jack,
2) Set Function/Range Selector to "Required Range". Set AC/DC Selector to
"DC". If the value of voltage to be measured is unknown, select the
maximum range first and reduce the range step by step until a satisfactory
reading is obtained.
3) Connect bath points of the tested voltage firmly with the test leads and the
tested voltage value shall show on the display immediately,
