Retlux RDM 9001 Manual Del Usuario página 77

Note: This function is not available when measuring diodes, capacitance,
transistor, and frequency.
Making Relative Measurements
When making relative measurements, reading is the difference between a
stored reference value and the input signal.
(1) Press
The measurement value when pressing
value.
In this mode, REL△ (current reading) = input value - reference value.
(2) Press it again to exit the mode.
In relative measurement, the manual range mode will be activated
automatically. (The relative measurement should be carried out under a
certain range, that is, this function is only available under the manual range
mode.) Analog bar graph is not displayed.
Note: This function is not available when measuring diodes, transistor, and
frequency.
Buzzer Feature
 Press the function key, the buzzer will sound "Be..." in short.
 One minute before Auto Power-off the buzzer will sound "BeBeBeBeBe"
five times to warn. Before it is shut off, the buzzer will sound
a long "Beee" then shut off.
 The buzzer will sound "BeBe..." continuously to warn when the
measured DC voltage is higher than 1000 V, AC voltage is higher than
750 V, or the measured DC/AC mV mode is higher than 600.0 mV.
 The buzzer will sound long when the short circuit resistance is less than
about 30Ω during the continuity test.
RDM 9001
to enter the relative mode.
is stored as the reference
9
EN