Oval Delta Flowpet FLX B Series, Instructions Manual, Page: 29 / 40

D-555-3-E
9
9.2 Preamplifier Inspection
9.2.1 Switches, Potentiometers, and Test Pins
• Amplifier Board
Part Name Printed Label Description
Trigger level setup
potentiometer
TL
Adjusts trigger level (pulse generating sensitivity)
over a range 80mV
p-p
to 1500mV
p-p
.
Amplifier gain setup
potentiometer
AM Adjusts amplifier gain. (Do not change the setting.)
Amplified waveform monitor
test pins
⊖
0V to
⊕
VTX
Monitors amplified sensor output signal (sinusoidal
wave).
Trigger waveform monitor test
pins
⊖
0V to
⊕
TRG Monitors triggered waveform (rectangular wave).
Digital filtered waveform
monitor test pins
⊖
0V to
⊕
PLS
Monitors digital filtered waveform. With respect
to the trigger waveform, the following frequency
division applies.
Metered
fluid
Liquid Gas
Nominal
pipe size
10,15,25A
40,50,
80,100A
10,15,25A
40,50,
80,100A
Frequency
divide
/5 / /5 /5
• Output Board
Part Name Printed Label Description
Regulated current adjust
potentiometer
VR
Adjusts regulated current of the circuit (Do not
change the setting.)
Output select switch 1 SW1
"A" side: Analog output service (standard)
"P" side: SIG. 3 output service
* Center (12 o'clock position) is used only for
regulated current adjustment.
Output select switch 2 SW2
SIG. 3 output setup
"N" side: Unfactored pulse output
"C" side: Factored pulse output
* When SIG. 3 is not used, "N" setting applies.
Output select switch 3 SW3 Always "A1"
Output select switch 4 SW4 Always "A2"
Analog output test pins ⊖Ⓐ to ⊕ IN−
Monitors 40mV to 200mV voltage with respect to
analog 0 to F.S.
NOTE: Potentiometers and switches are factory adjusted before shipment of the product. Do not readjust
their settings.