11. FREQUENCY MEASUREMENTS
NB : This function is only available on the F13N.
Warning : under no circumstances may the two-
types of input (voltage and current) be connected at
the same time.
Frequency measurements on the voltage input
Check that the clamp is not clamped around a cable.
Set the switch to the Hz function.
Connect the red lead to the + terminal and the black
one to COM then connect up to the element to be
measured.
Memorise the measurement, if necessary, by pressing
one of the HOLD keys.
Frequency measurements on the current input
Check that the leads are disconnected.
Set the switch to the Hz function.
Place the clamp around the cable.
If necessary, record the measurement by pressing one
of the HOLD keys.
12. GENERAL CHARACTERISTICS
12.1
Power supply
1 standard 9V alkaline battery (type IEC 6LF22 or NEDA
1604).
Service life : F11N : 180 hours without buzzer.
F13N : 100 hours without buzzer.
Typical consumption : F11N : 2,5mA without buzzer.
Low battery indication :
12.2
Buzzer
Continuous beep for the continuity sound test.
Typical sound level : 70dB(A) at 10cm.
F13N : 3,5mA without buzzer.
is displayed.
23