Vibration acceleration
or human vibration
1 mV/ms
-2
10 mV/ms
-2
Vibration velocity
1 mV/ms
-2
10 mV/ms
-2
Vibration displacement
1 mV/ms
-2
10 mV/ms
-2
Attenuation
at output
12 m/s²
peak
1.2 m/s²
peak
120 mm/s
peak
12 mm/s
peak
1.2 mm
peak
0.12 mm
peak
0 dB
120 m/s²
peak
12 m/s²
peak
1.2 m/s
peak
0.12 m/s
peak
12 mm
peak
1.2 mm
peak
-20 dB
1200 m/s²
peak
120 m/s²
peak
12 m/s
peak
1.2 m/s
peak
120 mm
peak
12 mm
peak
0 dB
6000 m/s²
peak
600 m/s²
peak
60 m/s
peak
6 m/s
peak
600 mm
peak
60 mm
peak
-20 dB
The output source impedance is < 100 Ω. The dynamic range is ± 2 V, i.e. at higher magnitudes
of the sensor signal the AC output will be clipped.
Figure 30: Pin assignment of the AC output socket (view from outside)
A protective cover makes the socket waterproof (IP65) when not in use.
19. Power Supply
19.1. Battery Operation
The VM30-H is powered from three Mignon / LR6 / AA type cells. It was designed particularly
with regard to a long battery life time.
Both Alkaline cells and NiMH accumulators can be used. A battery indicator with 20 segments
is displayed in the upper right display corner. For proper battery indication it is necessary to
select the correct battery type. Go to menu „8/8: Device settings“ and submenu „3/6: Battery
type“. Select the used battery type by the
▲▼
keys and confirm by OK.
If the battery voltage drops below a minimum value of 3.3 V, the text “Bat!” is displayed instead
of the battery indicator along with a beep sound (provided the beep sound is switched on, see
menu “1/6: Beeper on / off”). If the battery voltage drops further below 3.1 V, then the
instrument will switch itself off.
Important:
Switch off the VM30-H by the ON/OFF key before replacing the battery.
Otherwise the user settings may get lost.
Firmly press the two gray buttons on the side of the case (see Figure 1) and pull out the battery
holder. After replacing the batteries, put the battery holder back into the case with the cable
ahead and snap in the cover.
If the instrument cannot be switched on after replacing the batteries, press the RESET button as
described in section 21.
Important:
•
Use three batteries of the same type and manufacturing date.
•
Be sure to insert the batteries with the correct polarity as stamped on the battery holder.
•
Replace discharged batteries immediately and remove the batteries if the instrument is
not used for an extended period. Otherwise leakage may cause irreversible damage.
45
Z
Y
X
GND