Oval SU1312 User manual

Ins. No. E-414-1-E
PULSE-ANALOG CONVERTER
MODEL SU1312
Every OVAL product is fabricated and shipped from our factory under stringent quality control program. In
order to maintain its design performance throughout the life of this converter, this manual offers the operator
the necessary installation, operation and maintenance information.
Be well familiar with these instructions before you place the converter in service and keep this manual for your
quick reference.

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CONVENTIONS
Shown in this manual are the signal words NOTE, CAUTION and WARNING, as described in the
examples below:
NOTE: Notes are separated from the general text to bring the user's attention to
important information.
CAUTION: Caution statements signal the user about hazards or unsafe practices
which could result in minor personal injury or product or property damage.
WARNING: Warning statements signal the user about hazards or unsafe practices
which could result in severe personal injury or death.
CONTENTS
1. GENERAL............................................................................................................................ 3
2. FEATURES .......................................................................................................................... 3
3. OVERALL BLOCK DIAGRAM ............................................................................................ 3
4. INSTALLATION ................................................................................................................... 4
5. WIRING................................................................................................................................ 4
6. PREPARATION AND OPERATION..................................................................................... 5
7. QUICK TROUBLESHOOTING............................................................................................ 5
8. INDIVIDUAL JUMPER SWITCH AND POTENTIOMETER ADJUSTMENTS.................... 6
9. GENERAL SPECIFICATIONS ............................................................................................. 7
10. PRODUCT CODE EXPLANATION ................................................................................... 8

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1. GENERAL
This F/I converter accepts a train of incoming pulses from various kinds of flowmeters, or other signal
generating sources, shapes it and, after optical isolation, changes it into analog current and voltage signals.
Applications include flow indication, record and control.
2. FEATURES
1. Compactly built plug-in design. Easy to use and maintain.
2. Compatible with all kinds of analog signals.
3.Providesapowersupplytothepulsegeneratorandpreamplier(convertor)ofavarietyofowmeters.
4. If your converter is designed to operate on AC power, a free type power supply accepts 85 to 264VAC power
source(or20to30VDCintheDCversion).
3. OVERALL BLOCK DIAGRAM
GENERATOR
SELECT CIRCUIT
POWER SUPPLY
1/1 OUT
FLOW IN
POWER
2, 3, 4
5
11, 1
DC POWER TO PULSE GENERATOR
DC POWER TO F/I
DOUBLER F/I CIRCUIT
FREQUENCY
SYNC WITH INPUT
FREQ. RANGE
SW1 SW2
7, 8
9,10
I. OUT
V. OUT
P2P1
ZERO
SPAN
J1
OPEN: SINGLE
CLOSE: DOUBLE
TP1
FREQ. RANGE
FILTER TIME CONST.
{
{
Fig. 1
• Description of Individual Circuits (Blocks)
• Pulse Generator Select Circuit ... Selects the signal type of pulse generator and shapes the waveform of
incoming pulses.
• Power Supply ... Furnishes power of required voltage to individual circuits.
• Doubler .... Doubles the incoming pulse frequency so that a low-frequency pulse input is made
compatible with the F/I circuit in the following stage.
  (Withinarangeof2to4Hz,thiscircuitisusedforinputpulseswithapprox.1-to-1dutyfactor.)
• F/ICircuit... Convertstheincomingpulsefrequencytoa4to20mAand1to5Vanalogsignals.

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4. INSTALLATION
Installation Location
Select an installation location where
1. Mechanical vibration, shock and corrosive gases
least exist.
2. Air is dry and temperature is near to ambient and
stable.
NOTE : Although the max. allowable temp. is
   +50°C, use in place its temp. possibly
near to ambient is recommended.
3. Potential sources of inductive interference, such as
electromagnetic contactors, are located sufficiently
away.
4. A lightening arrestor is provided if incoming signals
aresubjecttopotentialinuenceoflightening.
5. A sufficient working space is secured behind the
instrument to facilitate wiring and maintenance.
5. WIRING
1. Separate field wiring from other power lines or
powercircuitstominimizethepossibilityofinductive
interference.
2. Terminal arrangement is shown in Fig. 5.
3. M3.5 x 7 screws are used for terminals. Ensure good
electrical connections.
4. Upon completion of wiring connections, install the
converter body into the socket. Then engage the
locking levers on the socket assembly with the
converter body.
5. For signal cables, electrostatically-shielded,
polyethyleneinsulated, vinyl-sheathed control cables
(CEVS1.25to2.00mm2,2-or3-conductor),or
equivalent, must be used. With a conductor area
2mm2, the maximum transmission length is typically
one kilometer.
2− φ4.5
7.8
35.4
118max.
4
4
5
33.5max.
81max.
4
40±0.2
51max.
TERMINAL
SCREW : 11−M3.5×7
LOCK LEVER
211110
3
4
5678
9
• OUTLINE DIMENSIONS,
SURFACE CONNECTION SOCKET ASSEMBLY
(11PFA)
Fig. 4
• CONNECTION TERMINALS
Fig. 5
POWER INDICATIOR
2-WIRE
INPUT 3-WIRE
INPUT
COM.
SIG.
SUP.
−
+
50
110.5
103.5
84 80
• OUTLINE DIMENSIONS, CONVERTER BODY
Fig. 2
• MOUNTING CENTERS
Fig. 3
2−M4FITTINGHOLE
40±0.2 40±0.2min.
20
IMPORTANT :
Make electrical connections upon confirmation of
validity of flowmeter (pulse generator) and receiving
instrument combination by their model No., serial No.,
etc.
CAUTION:
Notes on Wiring
- When I. OUT is not used, make a connection
between terminals (7) and (8). If L OUT is open, V.
OUT is not generated.
- When V. OUT is not used, make a connection
between terminals (9) and (10), then a
connection of load resistance up to 600Ωis
permitted for I. OUT.

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6. PREPARATION AND OPERATION
1. Ensure that the meter selector and related equipment are correctly installed and wired with no place left
unnished.
CAUTION: Make sure to see that the power terminals are connected to a power
source of the rated voltage.
Applying a power source of incorrect voltage could ruin your instrument.
2.Supplypowertothisinstrumentandmakesuretoseethatthepowerindicator(redLED)comeson.
3.Initiateoperationbyallowingtheuidtorun.
CAUTION: Allow a warmup period for 20 minutes or so after you turn on the power.
7. QUICK TROUBLESHOOTING
• If the trouble is suspected to be converter internal, seek our service.
PROBLEM CHECK POSSIBLE CAUSES
Powerindicatorlamp(LED)fails
to come on.
1. Inspect the analog board.
 Isthetypeofpowersupply(AC/DC)in
accordancewiththespecications?
2. Make sure of power surce voltage.
Isan85to246VAC(50/60Hz)poweror
20to30VDCpowerimpressedacross
terminals11(+)and1(-)?
1. Power supply board is improper.
2. Line voltage is improper.
3. A fault in the internal power supply
board.
Analog output is not produced. 1. Inputsignallinecorrectlywired?
2. Inputsignalcomingin?
3. Is the input signal in accordance with
thespecications?
1. Input wiring is incorredct.
2. Pulse generator is at fault.
3. Pulse generator select board in the
internal assembly is improper.
4. Power supply board or pules
generator select board or F/I board
is at fault.
• COMPONENT LOCATIONS
Fig. 6
SPAN POTENTIOMETER
ZERO POTENTIOMETER
POWERINDICATORLED(RED)
F/I BOARD
455004301
PULSE GENERATOR
SELECT BOAD
455901□0□
POWER SUPPLY BOARD
455004□01