HT Instruments HT7051 Manual De Instrucciones página 50

4. By pressing the arrow keys, the
instrument shows a screen similar to
that reported here to the side, which
contains the value of the input voltage.
5. Make sure that the set test voltage is the desired one. Should it not be the case,
please refer to § 5.3.1 to change it
6. Insert the measuring leads into the relevant input leads of the instrument -Rx, +Rx
and GUARD, if necessary (see § 4.5 and Fig. 5)
Make sure that there is no voltage at the ends of the measuring points before
connecting them to the measuring leads.
7. Connect the alligator clips to the part of the system to be tested.
8. Press the START/STOP key to perform measurement
The display shows the message "Measuring..." which indicates that the
instrument is performing the measurement. During this whole phase:
• Do not disconnect the measuring leads of the instrument from the
conductor being tested; the conductor could remain live at a dangerous
voltage because of possible stray capacitances in the circuit tested
• Never insert the power cord into the Europlug socket.
9. During measurement, the instrument
gives a short acoustic signal every
second and the display shows a
screen similar to that reported here to
the side, which contains:
• The ADJUST function selected
• The bar graph proportional to the
measured resistance value
• The numerical indication of the
measured resistance
• The actual test voltage
• The symbol of the alarm bell (if the measured value is not within the set limits
and/or if the value of the test voltage is lower than the set nominal value)
• The value of the test time elapsed or remaining (if a test has been set)
• The plug symbol (if the instrument is supplied from the mains)
• The battery symbol steadily illuminated or flashing (if batteries are flat or are
being recharged)
• The timer symbol if the duration of the test has been preset
• The two "flash" symbols to indicate a dangerous voltage
• The message "MEASURING..."
CAUTION
CAUTION
EN - 14
HT7051 - HT7051N