INSTALLATION & OPERATION
MANUAL
SP714 REV. B
Pulse Amplifier
DOC#: MN-714-B
Sponsler, Inc.
SP714 Pulse Amplifier
pg
2
DOC#” MN-714-B
Temperature:
Input Voltage:
6-28 VDC; 5 mA @ 24 VDC
Frequency 0-10 KHz
6-28 VDC squarewave proportional to input voltage
Features:
Individual LED indicators for power and output signal
Enclosure:
FM Approved, CSA Certified
Weight 1.7 lbs.
SPECIFICATIONS
Operating -40 to 85°C
Storage -65 to 125°C
Protected against polarity reversal
Signal Input:
Amplitude 20 mVp-p minimum sine or square wave
Sensitivity field adjustable
Impedance 10K @ 10KHz
Output:
Minimum load @ 250 ohms
Short circuit protection
Built in test oscillator that injects 4 Hz test signal when test P/B
depressed
Mounts directly on flowmeter
Class I Groups B, C, D
Class II Groups E, F, G
The SP714 is a meter-mounted device that amplifies and conditions low amplitude signals such
as those developed by a magnetic pickup coil. The amplitude of the squarewave output equals
the input supply voltage of the SP714. Signal amplification and conditioning permits trouble
free interfacing between low amplitude signal sources and electronic devices requiring pulse
inputs.
The sensitivity adjustment permits the SP714 to discriminate between an input signal and noise
by increasing (CCW) or decreasing (CW) the input signal amplitude necessary to be processed
as a valid signal. This, in conjunction with direct mounting, allows the SP714 to operate
effectively in noisy environments.
The SP714 contains a built in test oscillator that enables the operator to verify the amplifiers
operation without a signal source. The power LED illuminates when the input supply voltage is
present.
Sponsler, Inc.
SP714 Pulse Amplifier
pg
3
DOC#” MN-714-B
A)
Connect power supply positive & negative leads to J1-3,5; Respectively
B)
Connect oscilloscope positive & negative leads to J1-4,5; Respectively
Connect frequency generator positive & negative leads to J1-1,2;
Respectively. Set function to sinewave, amplitude to zero
D)
Install jumper @ JU1, Set “Sensitivity” adjust (R1) to zero
E)
Turn power supply “ON”, observe LED D1 illuminates and oscilloscope
displays a .6V DC level maximum
F)
Depress S1, LED D2 flashes and the oscilloscope will display a 4Hz
and the negative amplitude will be .6V > power supply negative potential
G)
Release S1, Set “Sensitivity” adjust (R1) fully clockwise. On the frequency
generator set the amplitude to 20mV and the frequency between 1 to 10KHz
H)
Oscilloscope will display a squarewave at the same frequency selected in step
G. The squarewave amplitude will be the same as step F.
While observing the oscilloscope display, momentarily short pins J1-4 & 5
return to the normal amplitude squarewave.
A)
Insure that ALL connections are correct and secure.
B)
LED D1 should be illuminated, if not check supply voltage @ J1-3,5. Note that
J1-3 must be positive in respect to J1-5 to function.
C)
Install jumper JU1 if not already installed, set “Sensitivity”; R1 Mid range.
Retest, No go- replace pulse amplifier.
Given proper flow exists, LED D2 should be flashing (High flow rate will make
and flowmeter.
BENCH TEST CALIBRATION PROCEDURE
Required Equipment: Power Supply 6-28 VDC, Frequency Generator, Oscilloscope
Test Procedure:
C)
squarewave with a positive amplitude .6V < power supply positive potential
I)
together. The oscilloscope display will be a slight squarewave with an
amplitude .6 or less. When the short is removed the oscilloscope display will
Field Test:
Depress S1 and observe LED D2 flashes - No go; Remove wire @ J1-1
D)
E)
D2 appear to be illuminated steadily) If D2 is “OFF” rotate “Sensitivity” adjust
(R1) clockwise until D2 illuminates. If D2 remains “OFF” check pickup coil
Sponsler, Inc.
SP714 Pulse Amplifier
pg
4
DOC#” MN-714-B
3.00 DIA.
2.40 DP.
3.75 DIA.
5.60
1.40
3/4-14 FNPT
5-5-97
TN
EM SP714
SP714 REV. B PULSE
\ELECT\SP714.DW G
NONE
DRAWING NUMBER
MATERIAL
SPONSLER, INC.
SCALE
DRAWN BY
DATE
APPR. BY
DATE
REVIEWED BY
DATE
DESCRIPTION
REV. #
FILE NAME
COD
REVCKDR
AUTH
REVISION RECORD
DATE
INPUT VOLTAGE -
SIGNAL OUT +
INPUT VOLTAGE +
SIGNAL IN -
SIGNAL IN +
5
4
3
2
1
TERMINAL LOCATION
SENSITIVITY
TEST
ENABLE
POWER INDICATOR
OUTPUT SIGNAL INDICATOR LED
(JUMPER JU1 INSTALLED)
NOTE: DIMIENSIONS ARE IN INCHES
.90
J1-1
234
5
R6
R9
C4
+
Q1-Q4 Q5-Q8
D1
R11-R16
R17-R19
C8
C7
+
+
R21
R7
R10
R8
CR3
R5
R22-R24
S1
A1
C3
C2
+R2R3
C1
R1
CR1
CR2
A2
+
JU1
R20
CR4
C5
+
R4
C6
+
D2
CB
SP714-REV B
©2009
Pub. No. MN-714-B
(09/09)
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