Larson Davis HVM100, Manual

Page: 48 / 174

4-4 HVM100 User Manual 4/11/03
Step 1
Enter the menu for the channel you wish to cali-
brate.
Step 2
Make sure the transducer for channel X is firmly
attached to the calibrator.
Step 3
Start the calibrator.
Step 4
Press the
c
key on the HVM100. The screen will
start to flash values. When the level of your cali-
brator appears in the screen, and the reading is sta-
ble, press the
c
key again.
NOTE: After a given channel has been
calibrated using the shaker type calibra-
tor, the HVM100 calculates the sensitive-
ity of the attached accelerometer. To view
the sensitivity please see the next section
in this manual.
This will calibrate channel X of the HVM100. Repeat the
procedure for the channels Y and Z. The Calibrate Y and
Calibrate Z displays are located just below the Calibrate X
display. (From the Calibrate X display press the
d
arrow
key once to get to the Calibrate Y display, and press the
d
arrow key again to get to the Calibrate Z display.)
NOTE: If the integration setting is set to single or double,
the HVM100 will not calibrate using a calibrator. Specifi-
cally, the Cal Level, Calibrate X, Calibrate Y, Calibrate Z
menu items will not be displayed.
Sensitivity X, Y, Z
Hint: This setting is in the Range menu. To access the Range menu press the
RANGE key and then use the
u
and
d
arrow keys to navigate
through the menu items.
Another method of calibrating the HVM100 is to use the
published sensitivity of the accelerometer. This is accom-
plished through the Sensitivity menu item.
C A L I B R A T E X
m/s
2
rms
During stabilization (i.e. after the
c
key has been pressed once), the cali-
bration can be cancelled by pressing
the on/off key.