4
Engineering Unit Selection
Engineering Units are selected based on the sensor used in conjunction with the transmitter and the desired
output. When using an IEPE accelerometer, choose either A-
A, for a g’s Acceleration output, or A
-V for an output in
terms of Velocity. When using a Velocity sensor, the transmitter must be in V-V mode for an output in Velocity
only. Place the PCB in front of you with the BNC facing up. To turn a switch off, move the lever to the left. To turn
the switch on, place it to the right. Only one of the Engineering Unit switches may turned on at one time.
A-A
V-V
A-V
Range
Sensor Input
ON
OFF
OFF
Acceleration Output (g’s)
IEPE Accelerometer
OFF
ON
OFF
Velocity Output (in/s or mm/s)
Piezo-Velocity Sensor
OFF
OFF
ON
Velocity Output (in/s or mm/s)
IEPE Accelerometer
Full Scale Range Selection
One of three Full-Scale range options can be selected by using switches R1, R2 or R3. The Full-Scale Range controls
the 4-20mA output scaling. To determine the Full-Scale range, choose the sensor type in the left-hand column and
match it to the range setting. The factory default setting is Range 2 (R2) and will provide a 1.00 in/s (25.4mm/s) full
scale output when used with a 100mV/g accelerometer. For example, when Range 2 (R2) is used with a 500mV/g
accelerometer, the full-scale output is 0.2 in/s (5.0mm/s).Velocity measurements can be scaled for either English
(in/s) or Metric (mm/s) units.
R-1
(Range 1)
R-2
(Range 2)
R-3
(Range 3)
Sensor Sensitivity
Acceleration
Velocity
Acceleration
Velocity
Acceleration
Velocity
A
cc
e
le
ro
me
te
r
IO
n
p
u
ts
50mV/g
10g
’s
1.0 in/s
(25.4mm/s)
20g
’s
2.0 in/s
(50.8mm/s)
40g’s
4.0 in/s
(101mm/s)
100mV/g
5g’s
0.5 in/s
(12.7mm/s)
10g
’s
1.0 in/s
(25.4mm/s)
20g’s
2.0 in/s
(50.8mm/s)
500mV/g
1g
0.10 in/s
(2.5mm/s)
2g’s
0.2 in/s
(5.0mm/s)
8g’s
0.8 in/s
(20mm/s)
Pi
e
zo
-V
e
lo
ci
ty
100mV/in/s
(4mV/mm/s)
N/A
0.5 in/s
(12.7mm/s)
N/A
1.0 in/s
(25.4mm/s)
N/A
2.0 in/s
(50.8mm/s)
500mV/in/s
(20mV/mm/s)
N/A
0.10 in/s
(2.5mm/s)
N/A
0.2 in/s
(5.0mm/s)
N/A
0.8 in/s
(20mm/s)