Sponsler SP714-S2i Pulse Amplifier

Introduction

Safety Procedures

• Before using this product, read and understand the instructions.
• All work must be performed by qualified personnel trained in the proper application, installation, and maintenance of equipment and/or systems in accordance with all applicable codes and ordinances.
• When handling electronic components and boards, always use proper Electrostatic Discharge (ESD) equipment and follow the proper procedures.
• Make sure that all necessary safety precautions have been taken.
• Provide for proper ventilation, temperature control, fire prevention, evacuation, and fire management.
• Provide easy access to the appropriate fire extinguishers for your product.
• Consult with your local fire department, state, and local codes to ensure adequate preparation.
• Read this manual as well as all the literature provided in your owner's packet.
• Save these instructions for future reference.
• Failure to follow the instructions set forth in this publication could result in property damage, personal injury, or death from fire and/or explosion, or other hazards that may be associated with this type of equipment.

General Information

The SP714-S2i is a meter-mounted pulse amplifier that amplifies and conditions low amplitude signals, typically produced by the magnetic pickup coil of a Sponsler turbine flowmeter. The SP714-S2i transforms the low power input signal from the pickup coil into square-wave output signals with enough energy to travel a greater distance and be detected reliably by the electronic device, such as a flow computer or an electronic register.

SP714-S2i and Sponsler Turbine Flowmeter Shipped as Assembly: In order to maintain IECEx compliance, the SP714-S2i is connected to the turbine flowmeter boss. The turbine meter and SP714-S2i assembly is pressure tested at the factory, then shipped as an assembly.

The SP714-S2i includes an input signal sensitivity adjustment (R1) that permits the SP714-S2i to discriminate between an input signal and noise by increasing or decreasing the input signal amplitude necessary to be processed as a valid signal. This, in conjunction with being directly mounted onto the turbine flow meter, allows the SP714-S2i to operate effectively in noisy environments.

The SP714-S2i also includes diagnostic tools. The diagnostic test oscillator (SW2) enables the operator to verify the amplifier's operation without a signal source. The green LED (D1) indicates the power supply status. The red LED (D2) indicates the signal frequency status.

Notice

This manual provides warnings and procedures that are intended to inform the owner and/or operator of the hazards present when using the Liquid Controls Meter on LP-Gas and other products. The reading of these warnings and the avoidance of such hazards is strictly in the hands of the owner-operators of the equipment. Neglect of that responsibility is not within the control of the manufacturer.

Publication Updates and Translations

The most current English versions of all Liquid Controls publications are available on our web site, www.lcmeter.com. It is the responsibility of the local distributor to provide the most current version of LC manuals, instructions, and specification sheets in the required language of the country, or the language of the end user to which the products are shipping. If there are questions about the language of any LC manuals, instructions, or specification sheets, please contact your local distributor.

Dimensions and Specifications

Dimensions

Front View Diagram: Shows the front of the SP714-S2i with dimensions: 0.65 inches (width), 3 inches (height), 2.95 inches (overall width), and 2 inches (depth). Includes Sponsler logo, CE mark, and regulatory labels. The casing also displays warning text: "CAUTION: TO PREVENT IGNITION OF HAZARDOUS ATMOSPHERES, DISCONNECT FROM SUPPLY CIRCUIT BEFORE OPENING. KEEP COVER TIGHT WHILE CIRCUITS ARE LIVE." and its French equivalent.

Side View Diagram: Illustrates the side profile of the SP714-S2i with dimensions: 1.26 inches (depth), 3.29 inches (width), and 4.26 inches (overall depth). A 1/2-14 NPT threaded conduit hub is visible.

Assembly Diagram: Depicts the SP714-S2i unit mounted onto the boss of a Sponsler turbine flowmeter.

Specifications

Output Signal Characteristics

Standard Configuration (2-wire Current Mode)

*Depends on power supply voltage and total system resistance (Load impedance + signal cable resistance)

TTL Sourcing (3-wire)

*Depends on DC power supply voltage value

Open Collector (3-wire)

*Depends on external DC power supply voltage value

Typical Signal Output Waveform Diagram

Diagram of a typical signal output waveform. The graph shows voltage on the Y-axis (Maximum and Minimum levels) and time on the X-axis. A single cycle is shown, representing a square wave pulse.

Regulatory Compliance Tag

Explosive Atmospheres Symbol:

IECEx DNV 11.0012X: This equipment has been found to comply with the Certification Scheme for Explosive Atmospheres of INTERNATIONAL ELECTROTECHNICAL COMMISSION (IECEx). Evaluation was made in 2013 by Det Norske Veritas (DNV) to IECEx scheme with a certificate number IECEx DNV 11.0012X, where X represents the following Special Conditions for Safe Use: 1) Only Ex d certified cable glands are to be used; and 2) For ambient temperatures above 70 °C, use field wiring suitable for 20°C above maximum ambient temperature.

II: Suitable for use in surface (not mine) installations.

2 G: High level of protection is provided against flammable gases, vapors, or liquids, which may exist during normal operation.

Ex d: Explosion protection is provided by a flameproof enclosure.

IIB: Gas group, which includes ethylene, propane, and methane.

T6: Temperature class for surface temperature limitations. T6 is ≤ 85°C

Gb: Equipment group per IEC 60079-0:2007.

-40°C ≤ Tamb ≤ 80°C: Safe limits of ambient temperature.

IP66: Ingress protection: dust tight and protected against powerful water jetting.

Consult factory for current compliance status.

Installation Overview

In order to maintain IECEx compliance, the SP714-S2i is shipped as part of an assembly with a Sponsler turbine flowmeter. A complete installation of the flowmeter and pulse amplifier assembly includes the physical installation of the flowmeter and the electrical installation of the SP714-S2i. Guidelines for the physical installation of the flowmeter can be found in the Sponsler turbine flowmeter manual. Instructions for the electronic installation of the SP714-S2i are included in this manual.

Installation overview for the SP714-S2i:

1. Install Sponsler turbine flowmeter (with SP714-S2i) into system piping. Refer to the Sponsler Turbine Flowmeter Installation Manual.
2. Wire the SP714-S2i to a pulse acquisition device and set the S1 switches to the preferred output signal characteristics. (See page 7)
3. Perform field test and adjust the input signal sensitivity (if necessary). (See page 11)

Wiring the Output Signal Configurations

The SP714-S2i can be set to one of three configurations: 2-wire Standard, 3-wire TTL Sourcing, and 3-wire Open Collector. The 2-wire Standard configuration translates the output signal from the turbine flowmeter's pickup coil into a current value. 2-wire connections are effective transmitting the signal over long distances. The 3-wire TTL Sourcing configuration translates the output signal from the turbine flowmeter's pickup coil into a voltage value. The output of the 3-wire TTL Sourcing configuration is driven either positive or negative internally. The 3-wire Open Collector configuration translates the output signal from the turbine flowmeter's pickup coil into a voltage value. The output is driven by an "Open Collector" transistor.

Each configuration requires a specific positioning of the two S1 switches, specific wiring connections (to the power supply and the pulse acquisition device), and a resistor(s) spliced into the +V leg from the power supply (optional for the 3-wire TTL Sourcing configuration).

The best configuration for your application is determined by the specifications of the pulse acquisition device (typically a flow computer or electronic register) receiving the SP714-S2i signal and the electrical characteristics of the application.

Diagram of SP714-S2i PC Board Layout: Shows terminal blocks TB1, TB2, switches S1, SW1, potentiometer R1 for sensitivity adjustment, and LEDs D1 (green) and D2 (red). It indicates switch positions for different wiring configurations.

Materials Required (not supplied with SP714-S2i)

• 18 AWG stranded wire in shielded cable, UL Listed. For ambient temperatures above 70°C, use field wiring suitable for 20°C above maximum ambient temperature.
• 1/2"-14 NPT cable glands. Use Ex d certified cable glands only.
• Connectors for pulse acquisition device or DC power supply. Refer to "Observe National and Local Codes" on this page.
• PTFE tape or pipe sealant.

Observe National and Local Codes

Use the proper cable glands, conduit connectors, cables, conduit, and installation procedures when wiring the SP714-S2i. Installations must be in full accordance with national and local codes to maintain the hazardous location ratings on the product.

2-Wire Standard Wiring

The 2-wire Standard configuration translates the output signal from the turbine flowmeter's pickup coil into a current value. This configuration produces an output signal using a resistor to convert electrical current variations into voltages. In this setup, the power supply travels on the signal wire, making 2-wire connections effective for transmitting signals over long distances.

To connect the SP714-S2i for 2-wire Standard:

1. Remove the SP714-S2i housing cover.
2. Pull the SP714-S2i board from the housing for access to the TB1 terminal block and the S1 switches.
3. Attach proper cable glands and/or conduit connectors to the SP714-S2i, the pulse acquisition device, and DC power supply.
4. Run the wires (through proper conduit) between the SP714-S2i, the pulse acquisition device, and DC power supply.
5. Set the first S1 switch to the ON position and the second S1 switch to the OFF position.
6. Splice the resistor onto the +V leg from the DC power supply. The value of the resistor can be determined using the information below.
7. Wire the SP714-S2i to the pulse acquisition device and DC power supply as indicated in the schematic.
8. If necessary, adjust the input signal sensitivity (R1), activate the diagnostic test oscillator (SW2), and/or check the diagnostic operational LEDs (D1 & D2). (See page 11)
9. Coil the wires underneath the CPU board and place the board inside the housing, ensuring the wires are not pinched, and replace the housing cover.

2-Wire Standard Wiring Schematic: Illustrates the connection of the DC power supply, SP714-S2i, and an electronic register/flow computer. It shows the signal path, ground, cable shield, and the placement of a resistor (RP) on the +V leg from the power supply. The internal operating principle shows the signal flow through the pickup coil.

Maximum Cable Length: 380 m (1200')

Minimum Wire Gauge: 0.75 mm² (18 AWG)

SP714-S2i Connections

CAUTION: If the total system resistance in a 2-wire standard configuration exceeds the recommended value, the preamplifier may function irregularly as a result of insufficient supply voltage to the terminals.

Resistor Value - 2-wire Standard

• Maximum cable wire resistance must be less than 30 Ω (R_cable = R_w1 + R_w2, both wires in cable).
• Total system resistance with +24 VDC power supply must be between 250 and 400 Ω (R_system = R_cable + R_P).
• Maximum System Current I_MAX = 90 mA.
• Resistor (R_P) Power Dissipation P_RD = (V_DC)² / R_P.

Recommended Resistor Value (R_P)

3-Wire TTL Sourcing Wiring

The 3-wire TTL Sourcing configuration translates the output signal from the turbine flowmeter's pickup coil into a voltage value. The output is driven either positive or negative internally. Note that the name "TTL" is misleading as the output switches from 0V to +Vs, not 0V to +5V as the TTL standard indicates. In the SP714-S2i, "TTL" signifies that the output is driven in both positive and zero volt cases. A pull-up or pull-down resistor is optional, but can be installed to prevent damage from faults.

To connect the SP714-S2i for 3-Wire TTL Sourcing:

1. Remove the SP714-S2i housing cover.
2. Pull the SP714-S2i board from the housing for access to the TB1 terminal block and the S1 switches.
3. Attach proper cable glands and/or conduit connectors to the SP714-S2i, the pulse acquisition device, and DC power supply.
4. Run the wires (through proper conduit) between the SP714-S2i, the pulse acquisition device, and DC power supply.
5. Set the first S1 switch to the ON position and the second S1 switch to the ON position.
6. Splice the resistor onto the +V leg from the DC power supply. This step is optional. The value of the resistor can be determined using the information below.
7. Wire the SP714-S2i to the pulse acquisition device and DC power supply as indicated in the schematic.
8. If necessary, adjust the input signal sensitivity (R1), activate the diagnostic test oscillator (SW2), and/or check the diagnostic operational LEDs (D1 & D2). (See page 11)
9. Coil the wires underneath the CPU board and place the board inside the housing, ensuring the wires are not pinched, and replace the housing cover.

3-Wire TTL Sourcing Wiring Schematic: Depicts the connection of the DC power supply, SP714-S2i, and an electronic register/flow computer. It shows the signal path, ground, cable shield, and an optional resistor (RP) on the +V leg. The internal operating principle shows the output driven by a transistor.

Maximum Cable Length: 1000 m (3280')

Minimum Wire Gauge: 0.75 mm² (18 AWG)

SP714-S2i Connections

Resistor Value - 3-wire TTL Sourcing

• Limit total system current to 50 mA (I_MAX = V_DC / R_P).
• For 24 VDC operation pulse acquisition device impedance must be at least 1200 Ω.
• For 5 VDC operation pulse acquisition device impedance must be at least 250 Ω.
• Resistor (R_P) Power Dissipation P = (V_DC)² / R_P.

Recommended Resistor Value (R_P)

3-Wire Open Collector Wiring

The 3-wire Open Collector configuration translates the output signal from the turbine flowmeter's pickup coil into a voltage value. The output is driven by an "Open Collector" transistor. A resistor is required to "pull-up" the voltage when the transistor is 'off'.

To connect the SP714-S2i for Open Collector 3-Wire:

1. Remove the SP714-S2i housing cover.
2. Pull the SP714-S2i board from the housing for access to the TB1 terminal block and the S1 switches.
3. Attach proper cable glands and/or conduit connectors to the SP714-S2i, the pulse acquisition device, and DC power supply.
4. Run the wires (through proper conduit) between the SP714-S2i, the pulse acquisition device, and DC power supply.
5. Set the first S1 switch to the OFF position and the second S1 switch to the ON position.
6. Splice the resistors between the +V leg from the DC power supply and the signal input leg to the pulse acquisition device. The value of the resistor can be determined using the information below.
7. Wire the SP714-S2i to the pulse acquisition device and DC power supply as indicated in the schematic.
8. If necessary, adjust the input signal sensitivity (R1), activate the diagnostic test oscillator (SW2), and/or check the diagnostic operational LEDs (D1 & D2). (See page 11)
9. Coil the wires underneath the CPU board and place the board inside the housing, ensuring the wires are not pinched, and replace the housing cover.

3-Wire Open Collector Wiring Schematic: Shows the connection of the DC power supply, SP714-S2i, and an electronic register/flow computer. It includes signal path, ground, cable shield, and resistors (RI and RP) for pull-up functionality. The internal operating principle shows the output driven by an open collector transistor.

Maximum Cable Length: 1000 m (3280')

Minimum Wire Gauge: 0.75 mm² (18 AWG)

SP714-S2i Connections

Resistor Value - 3-wire TTL Sourcing

• Limit total system current to 50 mA (I = V_DC / R_P).
• Resistor (R_i) Power Dissipation P = (V_DC)² / R_i.
• Resistor (R_P) Power Dissipation P = (V_DC)² / R_P.

Recommended Resistor Value (R_i and R_P)

Settings & Diagnostics

Input Signal Sensitivity Adjustment (R1)

The R1 Input Signal Sensitivity Adjustment is a valuable tool that, in addition to the SP714-S2i being directly mounted to the turbine meter, allows effective operation in noisy environments. R1 is a potentiometer that sets the amplitude of the input signal (from the pickup coil) that the SP714-S2i will accept as a valid pulse.

Adjusting R1 allows the SP714-S2i to differentiate between the input signal and any noise in the system. Turning R1 clockwise decreases the amplitude of the input signal required for a valid pulse, and turning R1 counterclockwise increases the required amplitude.

The detection level of the R1 potentiometer is set at approximately 17 mV rms at the factory. A red varnish is applied to the potentiometer screw to seal the factory setting.

Diagram of SP714-S2i PC Board Layout: Shows the location of the input signal connector, terminal blocks (TB1, TB2), switches (S1, SW1), diagnostic test oscillator (SW2), diagnostic LEDs (D1 & D2), and the input sensitivity adjustment potentiometer (R1). A wiring harness connector is also shown.

Diagnostic Test Oscillator (SW2)

The SW2 Diagnostic Test Oscillator verifies that the SP714-S2i is operational. To activate the test, press the SW2 push button. A 10 Hz signal will be introduced into the SP714-S2i signal output pins (TB1). For best results, use the SW2 Diagnostic Test Oscillator without the presence of the pickup coil signal.

Warning: Do Not Use the SW2 During Operation: If an input signal from the pickup coil is present, the 10 Hz signal from the SW2 can disrupt the SP714-S2i output signal, and an error will be detected by the pulse acquisition device.

Diagnostic Operational LEDs (D1 & D2)

There are two Diagnostic Operational LEDs (D1 and D2) on the SP714-S2i PC board that indicate the current operational status of the preamplifier. The green LED (D1) indicates the power supply status. When the green LED is on, the power supply is sufficient. When the LED is dim or flashing, the preamplifier does not have sufficient power.

The red LED (D2) indicates the status of the signal traveling through the preamplifier. The red LED flashes at the same rate as the frequency of the signal passing through the SP714-S2i. If the LED is not flashing, no signal is passing through the amplifier. If the signal frequency is above 40 Hz, the light will flash very quickly and the LED will appear to be constantly illuminated. If the input into the SP714-S2i stops on a positive portion of the signal pulse, the LED will be illuminated constantly.

The D1 and D2 LEDs are inoperable in the 2-wire Standard configuration.

Maintenance - CPU Board Replacement

The CPU board (PN 85025) is the only SP714-S2i part available for purchase. If you are replacing the 85025 CPU board, the wiring harness, which connects the pickup coil and to the SP714-S2i CPU board, must be unplugged from the old CPU board and plugged into the replacement board, then wired appropriately.

To replace the 85025 CPU board:

1. Remove the SP714-S2i housing cover.
2. Pull the CPU board from the housing, disconnect the wires to the power supply and the pulse acquisition device, and unplug the wiring harness.
3. Plug the wiring harness into the replacement CPU board, wire the replacement CPU board to the power supply and the pulse acquisition device, set the board into the housing, and replace the housing cover. See pages 7-10 for detailed instructions.

Note: The polarity of the connector at the pickup coil is not important.

Contact Information

Liquid Controls
105 Albrecht Drive
Lake Bluff, IL 60044
(847) 295-1050

SampI
Via Amerigo Vespucci 1
55011 Altopascio (Lucca), Italy
+39 0583 24751

Toptech Systems
1124 Florida Central Parkway
Longwood, FL 32750
(407) 332-1774

Nateus Business Park
Nieuwe Weg 1-Haven 1053
B-2070 Zwijndrecht (Antwerp), Belguim
+32 (0)3 250 60 60

Corken
3805 Northwest 36th St.
Oklahoma City, OK 73112
(405) 946-5576

IDEX Fluid and Metering Pvt. Ltd.
Survey No. 256, Alindra
Savli GIDC, Manjusar
Dist. Vadodara 391 770
Gujarat, India
+91 2667 662001

Faure Herman
Route de Bonnetable
B.P. 20154
72406 La Ferté-Bernard Cedex, France
+33 (0)2 43 60 28 60

4702 North Sam Houston Parkway West, Suite 100
Houston, TX 77086
(713) 623-0808

Liquid Controls Sponsler
105 Albrecht Drive
Lake Bluff, IL 60044
(847) 295-1050

General Contact:
105 Albrecht Drive
Lake Bluff, IL 60044-2242
1.800.458.5262 | 847.295.1050
Fax: 847.295.1057
www.lcmeter.com

© 2013 Liquid Controls
Pub. No. 500372 (8/2013)