CEMB USA N300 - Manual (Page 26)

5 - 2 Vibrometer function
1. Enabling/Disabling a channel:
Each of the measurement channels of the N300 instrument can be:
-
enabled when you wish to connect a sensor and take a measurement
-
disabled when no sensor is connected
In the event that a channel is disabled, all of the other measurement settings disappear, and
pressing displays the OFF message.
2. Sensor type:
One of the sensors for which the sensitivity has been set must be selected (see 4.1 –
Sensor sensitivity):
− ACC-1 : type 1 accelerometer (powered – IEPE type)
− ACC-2 : type 2 accelerometer (powered – IEPE type)
− VEL-1 : type 1 velocimeter (not powered)
− VEL-2 : type 2 velocimeter (not powered)
− DIS-1 : type 1 displacement sensor (not powered)
− DIS-2 : type 2 displacement sensor (not powered)
When required, the N300 instrument automatically supplies power to the sensors
connected.
Warning:
To obtain a sufficiently accurate measurement the sensor effectively connected
must be correctly associated with each channel.
3. Measurement:
Indicates the type of measurement carried out:
− Overall: overall vibration value
− Synchronous measurement: value of the synchronous component at the rotation
velocity (1xRPM) or its multiples (2xRPM, 3xRPM, 4xRPM, 5xRPM)
4. Units of measurement
Select the unit of measurement in which the vibration is to be expressed: the possibilities
are:
− acceleration (g)
− velocity (mm/s or inch/s)
− movement (µm or mils)
Warning:
Displacement and speed measurements can be taken when displacement sensors
are used, however their use means acceleration measurements cannot be taken.