4.18.5 lf the resistan ce of the circuit being tested is less
than 400, the built-in buzzer will sound.
4.18.6 Read the resistan ce on the main indicator of the
LCD.
Note:
lf the test leads are open or the resistan ce of the circuit
is over 4000, "O L" will appear on the LCD.
4.19 Measuring Relative Humidity
4.19.1 This function is used for measuring the ambient
humidity around the meter.
4.19.2 Turn the rotary selector away from the OFF
position.
4.19.3 The current ambient humidity will be shown on
the humidity display of the LCD.
Note:
1) The humidity sensor is placed inside the front part of
the meter and therefore it may take a longer time to
reach balance with the environment being measured.
Furthermore, it takes a longer intermission time, about
20 seconds, for sampling and the meter has to be
exposed to the environment for a longer time for
accurate reading. Hence it is not suitable for
measuring rapidly changing ambient humidity.
2) lt will take sorne time for a steady RH reading when
the ambient humidity changes.
33
4.20 Measuring Temperature
(With T hermo-Resistor}
4.20.1 This function is used for measuring the ambient
temperature around the meter.
4.20.2 Turn the rotary selector away from the OFF
position.
4.20.3 The current ambient temperature will be shown
on the temperature indicator of the LCD.
4.20.4 Press the ''°C/"F'' button to switch between
º
and
F measurement.
Note:
1 ) The temperature sensor (thermo-resistor) is placed
inside the front part of the meter and therefore it may
take a longer time to reach thermal balance with the
environment. Furthermore, it takes a longer
intermission time, about 20 seconds, for sampling
and the meter has to be exposed to the environment
for a longer time for accurate reading. Hence it is not
suitable for measuring rapidly changing ambient
temperature.
2 ) The working temperature of the meter is O - 40
As the temperature sensor is placed inside the
meter, this function is applicable for measuring
ambient temperature between O and 40
3 ) lf exposed to an environment beyond O - 40
meter may show a wider range of temperature
measurement, but the accuracy cannot be ensured
and damage to the meter may be caused.
34
·e
º
C.
º
C.
º
C, the