CEMB USA N300 - Manual (Page 22)

4 - 2 Setup function
Note:
Although the instrument can operate correctly with any combination of sensors, we
recommend that sensors of the same type and model are connected to the two
channels.
For both possible types:
-
accelerometer ACC
-
velocimeter VEL
-
displacement DIS
two different sensitivity levels can be set, identified respectively by “1” and “2”.
Therefore six different sensors can be defined:
- ACC-1 accelerometer 1 (powered – IEPE type)
- ACC-2 accelerometer 2 (powered – IEPE type)
- VEL-1 velocimeter 1(not powered)
- VEL-2 velocimeter 2(not powered)
- DIS-1 displacement sensor 1 (not powered)
- DIS-2 displacement sensor 2 (not powered)
making it possible to use the same types of sensors but with different sensitivity levels.
Typical sensitivity values for the various sensors are:
SENSOR TYPE SENSITIVITY TYPICAL VALUE
Accelerometer (ACC) mV/g 100
Velocimeter (VEL) mV/(mm/s) 21,2
Displacement (DIS) mV/µm 8
Warning:
The sensitivity of some models may differ from the typical values shown; make
sure that the sensor is set with the correct value taken from its documentation.
Date
The date must be entered in the N300 instrument using two figures for the day, two for
the month and two for the year, in this order. To assist the operator, the dd/mm/yy
format is displayed below the current date.
New values can be entered following the same procedure as that described above for
the sensitivity of the sensors (see above).