
Installation
Page 7April 2018 DSY-PM-00022-EN-14
INSTALLATION
Connecting the B3000 to a Frequency Output Device
Most turbine flow sensors produce a frequency output that is directly proportional to the
volumetric flow through the sensor� There are, however, different output waveforms that
can be presented to the display device depending on the transducer that converts the
mechanical motion of the turbine into an electrical signal�
The B3000 monitor has two jumpers for setting the type of signal and the minimum
amplitude of the signal that it accepts� First, establish the type of output provided by the
flow sensor� The outputs almost always fall into one of two types�
• Type 1 is the unaltered frequency signal coming from an un-amplified magnetic
pickup� This signal is normally a sine wave in appearance, and the amplitude of the
waveform varies with the flow� Small turbines have comparatively small rotating
masses so they produce a smaller amplitude waveform and higher frequencies than
larger turbine sensors�
• Type 2 is the frequency signal from the transducer is amplified, wave shaped or both,
to produce a waveform of a specified type and amplitude� Most amplified transducers
output a square wave shape at one of many standard amplitudes� For example a
popular amplified output is a 10V DC square wave�
If the flow sensors output signal is type 1, you must also determine the minimum
amplitude of the frequency output� The B3000 monitor has a high or low signal sensitivity
setting� Use the high signal sensitivity (30 mV) with low amplitude (usually small) turbine
flow sensors� Use the low signal sensitivity setting (60 mV) for larger turbines and amplified
transducers (see Figure 3 and Figure 4)�
OTE:NUse the high signal sensitivity setting where the minimum signal amplitude is
below 60 mV� Setting the sensitivity lower than necessary may allow of noise
interference�
JP1
JP2
JP3
Input Total Pulse Signal
TB1
Mag
Pulse
Iso
OC
Low
High
Input Waveform Selection
(Magnetic Pickup Selection Shown)
Input Signal Level Selection
(Low Signal Sensitivity (60 mV) Selection Shown) Freq. In
+
–
Gnd
JP1
Input
MagPulse
JP2
TB2
TB1
P1
Signal
LowHigh
P1
Input Waveform Selection
(Magnetic Pickup Selection Shown)
Input Signal Level Selection
(Low Signal Sensitivity (60 mV) Selection Shown)
Figure 3: Input jumper settings (NEMA 4X) Figure 4: Input jumper settings (Ex-Proof)
When the type of waveform and input signal level (amplitude) are determined, set the
jumpers on the B3000 monitor circuit board�