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FCS Sentinel 2 User Manual

2-point pressure control system
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User Guide: Sentinel 2
(2-point Pressure control system)
Warning: This manual contains important safety and operating information.
Please read, understand, and follow the instructions in the manual.
MAN-163-0004-B
September 2022
1

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Summary of Contents for FCS Sentinel 2

  • Page 1 User Guide: Sentinel 2 (2-point Pressure control system) Warning: This manual contains important safety and operating information. Please read, understand, and follow the instructions in the manual. MAN-163-0004-B September 2022...

  • Page 2: Table Of Contents

    Connecting the Comms Cable ................. 10 2.3.3 Loading Sentinel 2 settings into IDT ..............11 2.3.4 Saving settings from IDT into Sentinel 2 ............13 Sentinel 2 System Kits....................15 Sentinel 2 Control Box – Description ..............15 2.5.1 Logger functions ....................15 2.5.2...
  • Page 3 4.1.3 Hydroswitch ...................... 35 Connection to the Flow meter ................36 Connect External Pressure transducers to Sentinel 2 .......... 36 Check / modify Sentinel 2 channel settings ............37 Re-zero Pressure transducers ................43 Prepare the pipework for the Sentinel 2..............45 Prepare the PRV for Sentinel water feed / pressure transducers......
  • Page 4 Graphing / data download and preview ................ 69 Manual download of data into IDT / Preview as a graph ........69 Connection Information ....................71 6.1.1 FLOW Meter connection / cable RAG 93 ............71 Maintenance, Service and Repair................... 72 7.1.1 Return of product for Investigation, Service.

  • Page 5: System Documentation And Support Of Product

    Thank-you for choosing a HWM device. We trust it will provide you with many years of service. The Sentinel 2 system is designed to control the outlet pressure from a clean-water pressure reducing valve. This user-guide provides details of the Sentinel 2 system components. It provides details of how to install the product in a stand-alone mode and also (optional) integration with the HWM DataGate system, providing on-line viewing of pressure measurements.

  • Page 6: Overview

    2.1 I NTRODUCTION Sentinel 2 is a system that is used to control the outlet pressure of a pressure reducing valve (PRV) within a clean-water supply pipe network. This section gives an overview of Sentinel 2, the equipment that is required to use it, and other (optional) system elements.
  • Page 7 The Sentinel 2 system replaces previous generations of HWM pressure control systems, known as Sentinel Plus. Existing sensors and pipework may be compatible and may be re-used with a Sentinel 2 installation if in good condition; Discuss with your HWM sales representative if required.
  • Page 8 The Sentinel 2 system controls the PRV by means of hydraulic actuation. It can monitor upstream pressure, downstream pressure, and flow through the PRV. It may therefore require connection to various points in the water supply and PRV. An example of a PRV...

  • Page 9: Server Integration Option: Datagate And Pressview Websites

    Sentinel unit. This feature is not covered further in this document; refer to the User-Guide or instructions for PressView for more details. The Sentinel 2 can also send any fault notifications (alarms) to the server for forwarding to interested parties.

  • Page 10: Communicating With Sentinel 2

    Attach the Comms cable to the “COMMS / EXT.BATTERY” connector of the Sentinel 2 Control Box. Connect the other side of the connector to the PC (USB port). It is now possible to communicate with the Sentinel 2 system using IDT.

  • Page 11: Loading Sentinel 2 Settings Into Idt

    This copy can be edited. The unit itself is not updated with any of the program changes unless the user later saves the settings stored in IDT back to the Sentinel 2 Control unit by clicking on the ”Setup Device” button in IDT.
  • Page 12 The “Hardware Test” / “Data Collection” / ”PRV Installation” tabs shown in the above image provide access to information, settings, and control functions available in Sentinel 2 and will be explained later in this manual. e.g. The “PRV Installation” tab is used during installation.

  • Page 13: Saving Settings From Idt Into Sentinel 2

    IDT tool. After reading (copying) the current program settings into IDT, the user can modify them (as explained within this manual) and then update the Sentinel 2 by writing back the settings into the unit. This action can also be used to activate the built-in logger.
  • Page 14 If the PRV control function of Sentinel 2 has not yet been started, IDT will ask if you wish to start it now. Since we have not yet set these parameters but will do so later, click “No”. IDT reports that the unit has been given the new settings successfully.

  • Page 15: Sentinel 2 System Kits

    No components will be labelled with the kit part number; Each item will be labelled using its regular part-number (as described within sections that follow). Please discuss any requirements for ordering Sentinel 2 as a system kit with your sales representative. 2.5 S –...

  • Page 16: Prv Control Functions

    Other interface options can be included (at the time of ordering). An example of a Sentinel 2 Control Box is shown opposite. It contains the following standard interfaces: A connector for attachment of an antenna for the cellular •...
  • Page 17 The part-number is useful to verify the interface content of the unit, summarised as follows ... Model Number(s) Description C163C / * / * / * / S* Sentinel 2 Controller (Reserved by HWM). Electrical options. “Electrical options” is a 6-character field, as follows: c c c H c c...

  • Page 18: Hydroswitch - Description

    The unit attaches to the control box via a built-in cable with MIL-spec connector. The Hydroswitch is powered by internal batteries. Its operation is directed by the Sentinel 2 Control Box but takes approximately 10 seconds to change.
  • Page 19 This will be the assumed requirement for the descriptions within this manual. Note: Sentinel 2 units can also be factory configured to support a low-pressure condition during a fault. This is non-standard and requires changes to installation plumbing and hidden software settings in the Control box.
  • Page 20 The diagram opposite shows how to connect the Hydroswitch to the 3-pin connector on the Sentinel 2 Control box. If required, the Hydroswitch can be tested prior to plumbing it into the system: Connect the communications cable to the Sentinel2, read the settings, and then select the PRV installation tab.

  • Page 21: Mechanical Actuator

    ECHANICAL CTUATOR In order to control the outlet pressure of a PRV the Sentinel 2 system is required to modify the PRV behaviour so that it produces downstream water pressure which follows the programmed pressure profile. This is achieved with the help of the HWM Mechanical Actuator, shown opposite.

  • Page 22: Pilot Valve Operation

    2.8.2 Pilot Valve operation A typical pilot valve is shown in the diagram opposite. Spring It is constructed with a plunger which has its stem adjustment bolt connected to a diaphragm. The position of the plunger is dependent on any forces acting either side of the diaphragm;...

  • Page 23: Prv Function (Under Sentinel 2 Control)

    Sentinel 2 is able to control the spring force by adding or removing water from the upper chamber of the actuator. This operates a rod internal to the device (the stem of the plunger) which connects to the seat of the spring.

  • Page 24: Theory Of Operation (2-Point Pressure Modulation; High And Low)

    2.9.2 Theory of operation (2-point pressure modulation; High and Low) The plumbing of a Sentinel installation (hydraulic control circuit only) is illustrated below: The Inlet port connects to the upstream side of the PRV (as long as its pressure is below 90m;...
  • Page 25 Hydroswitch Solenoid. Path when at “Low”. (Common) Pressure Feed With the valve in the position shown (above), which is the “Low” pressure position, the actuator has no water pressure applied, but instead is vented to atmospheric pressure. The water in the upper chamber of the actuator can escape via the vent pathway, which causes the plunger to depress the spring less.

  • Page 26: Configuration Options (Diagrams)

    ONFIGURATION OPTIONS DIAGRAMS The following sections illustrate some of the possible installation configurations that are achievable using the basic Sentinel 2 system. 3.1 K EY TO COMPONENTS WITHIN THE DIAGRAMS To assist understanding of the diagrams, details of the various other components surrounding the PRV are shown below.
  • Page 27 (Image shown is for illustration purposes only) Sentinel 2 Control box A Sentinel 2 control box is shown opposite. (To Hydroswitch) The unit has an interface for connection to the Hydroswitch unit.
  • Page 28 Hydroswitch Valve The Hydroswitch valve is a 3-way solenoid valve controlled by the output from the Hydroswitch. It is used to drive the HWM mechanical actuator. Vent (to drain) Pressure feed Common (to 3-way tap / Actuator) Cable (from Hydroswitch) The Hydroswitch valve body is labelled (red and green dots) to assist in identifying the ports during installation.

  • Page 29: Standard Installations: 2-Point Pressure Control

    3.2 S : 2- TANDARD INSTALLATIONS POINT PRESSURE CONTROL 3.2.1 Using: internal transducers (Upstream pressure < 90 m)

  • Page 30: Using: External Pressure Transducers (Upstream Pressure < 90 M)

    3.2.2 Using: external pressure transducers (Upstream pressure < 90 m)

  • Page 31: Using: Internal Transducers (Upstream Pressure > 90 M)

    3.2.3 Using: internal transducers (Upstream pressure > 90 m)

  • Page 32: Using: External Pressure Transducers (Upstream Pressure > 90 M)

    3.2.4 Using: external pressure transducers (Upstream pressure > 90 m)

  • Page 33: Other Installation Options)

    PTIONS 3.3.1 Additional Data Logging interfaces Sentinel 2 includes data-logger functions. Spaces are available to install additional interfaces for data-logging. These must be fitted and enabled at the time of manufacture. Select the appropriate model part-number; Refer to your sales representative for assistance if required.

  • Page 34: Installation Procedure

    The installer will be required to become familiar with the use of IDT as it is used at various parts of the installation process. (e.g., It is required in order to bleed air out of the system, test Sentinel 2 and Hydroswitch operation, and program a Sentinel 2). Summary of system selection and Installation: The system can be fitted to an operating PRV, however some flow pressure variation will be experience whilst testing the system.

  • Page 35: Position Control Box And Hydroswitch / Connect

    ONTROL BOX AND YDROSWITCH ONNECT The Sentinel 2 Control Box can be secured to a wall using an optional bracket, shown opposite. Ensure the wall and fixings used are able to bear the weight of the Sentinel 2 and any cables.

  • Page 36: Connection To The Flow Meter

    ONNECTION TO THE LOW METER Connection to the flow meter is required for any Sentinel 2 that uses a pressure profile that is dependent on flow (i.e., flow or combined time and flow). For other situations it is optional and will be used only by the data-logger functions.

  • Page 37: Check / Modify Sentinel 2 Channel Settings

    ENTINEL CHANNEL SETTINGS In order for Sentinel 2 to operate correctly, any input channels must be set up, along with any calibration data and also various other settings. Select the Setup tab in IDT. Scroll to the “Logging Channels” panel.
  • Page 38 Note: The pressure range can be found from examination of the model number for internal transducers, or a calibration details label on the cable of external transducers supplied by HWM. Our example unit, Sentinel 2 unit has 4 available input transducers (input sensors): Pressure1: An internal pressure •...
  • Page 39 0.1 to convert it to metres (m, the selected recording unit). “Input multiplier” is therefore set “0.1”. The “Logging Mode” should be set at “average” for Sentinel 2; this will smooth-out any noise (short fluctuations) in the readings and give a representative value of pressure.
  • Page 40 It should be modified if required. The Flow input for Sentinel 2 PRV control is required to be a volt-free pulse input. This could be one of the following: Flow Bi (for a Bidirectional Flow meter), as in this example or •...
  • Page 41 If 1 pulse represents 10 litres, “Units per pulse” should be set to “10”. “Logging Mode” should be set at “average” for Sentinel 2; this will smooth-out any noise (short fluctuations) in the readings and give a representative value of flow.
  • Page 42 External Pressure Transducers – Entering Calibration coefficients External pressure transducers from HWM have calibration coefficients that must be entered into IDT in order for Sentinel 2 to use them correctly. Enter the values, as per the example opposite (including any negative symbols).

  • Page 43: Re-Zero Pressure Transducers

    4.5 R ZERO RESSURE TRANSDUCERS Ensure any external pressure transducers are connected to the Sentinel 2 at this stage. Be sure to connect the inlet pressure transducer to the connector labelled “PRV • Inlet pressure”. Be sure to connect the outlet pressure transducer to the connector labelled “PRV •...
  • Page 44 This starts the re-zeroing process of the Sentinel 2, which repeatedly reads the numeric output from the transducer. …Wait for this to stabilise (e.g. wait for 10 readings) and then click the “Save” button. The value is stored. Note: If the value does not stabilise and is showing readings with a difference of more than 5, contact a HWM representative for advice.

  • Page 45: Prepare The Pipework For The Sentinel 2

    4.6 P REPARE THE PIPEWORK FOR THE ENTINEL Accessory kits which include coloured hoses are available from HWM (ACT00* series accessory kits); Coloured hoses makes identification easier. A manual 3-way valve and quick-connect fittings are also available. The standard ACT002/STD kit is shown below: Use the installation diagrams to select the type of installation required: Standard installation where inlet pressure to PRV is less than 90m.

  • Page 46: Prepare The Prv For Sentinel Water Feed / Pressure Transducers

    Close those required for transducers and connectors to the PRV, as water feed to Hydroswitch solenoid valve. required, to allow connection to Sentinel 2 at a later stage. Do not fit any hoses or pressure transducers to the PRV at this stage.

  • Page 47: Connect Sentinel Side Pipework

    4.8 C ONNECT ENTINEL SIDE PIPEWORK The pipes will be sealed and retained by the connector (until they are manually released, which requires pushing on the connector’s ring whilst pulling the pipe away from the connector). Where the Control box has internal pressure transducers, a quick-release adaptor is required to be fitted to the pipe-end before it can be attached.

  • Page 48: Set Hydroswitch Valve Into Auto Mode

    Fit adaptors as required to the 3-way valve of Hydroswitch. Vent Attach water pressure hose to the port shown as “Pressure Feed” in the diagram opposite. Attach a water hose to the port shown as “Vent” in the diagram opposite, and route to a suitable drainage point.

  • Page 49: Connect Transducers And Control Pipework On Prv Side

    4.10 C ONNECT TRANSDUCERS AND CONTROL PIPEWORK ON SIDE Before proceeding, confirm that any pressure transducers are of a suitable pressure range, that the channels have been set up, and the transducers have been re-zeroed at atmospheric pressure. Connect any external pressure transducers to the appropriate location on the PRV valve, ensuring that: The upstream side is connected to the “PRV Inlet Pressure”...
  • Page 50 Lock the PRV top chamber by closing the valve to the top chamber, if possible. Close PRV top chamber valve If your PRV has taps on the pipe rail, shut both the input and output path of the pilot valve together (at the same time).

  • Page 51: Fitting And Adjusting The Hwm Mechanical Actuator

    4.12 F ITTING AND ADJUSTING THE MECHANICAL ACTUATOR Ensure that the thread of the HWM mechanical actuator being used is the same type of thread as the existing adjustment bolt on the PRV pilot valve. (HWM can supply alternative threads if the actuator is unsuitable). Screw the top nut and bottom nut towards the middle nut so that they are together (see picture).
  • Page 52 Whilst checking the outlet pressure of the PRV, set the maximum pressure required by adjusting the position of the actuator bolt. To do this, use the middle nut (fixed) on the actuator thread: Screw it clockwise / inwards to increase the output pressure. •...

  • Page 53: Bleed Air From The Pipework And Actuator

    Where internal transducers are fitted, detach and then re-attach the pipes using the quick-release connectors at the Sentinel 2 side (several times). This will allow air to escape from the pipes via the quick-release connector and be replaced by water.

  • Page 54: Test Pressure Transducers

    Set the Sentinel to Override to a target pressure of Low for a suitably long duration (e.g. 30 mins). This will open the path between the 3-way tap and vent. Change the position of the 3-way tap, allowing water to enter the red pipe from the PRV service valve.

  • Page 55: Testing The Actuator And Prv Pressure Change Response

    High or Low pressure settings and then stabilise. The pressure can be verified using an external pressure meter or by using the Sentinel 2 pressure transducers with IDT. To use the Sentinel 2 transducers, click the “Live Values” button. The display will update to show pressure and flow values.

  • Page 56: Prv Control Method And Settings

    4.16 PRV C ONTROL METHOD AND ETTINGS Sentinel2 provides 2-point pressure control; It is used to switch the output pressure for the PRV between either a High or Low pressure setting, with the needle valve of the pilot controlling the gradual downstream pressure changes between any transition in the target pressure.
  • Page 57 To enter a time, select either the hours or minutes digits and over-write them with your settings. The Time Control profile of Sentinel 2 causes a switch-over of the actuator to the new setting when reaching an entered time. Lines can be added to IDT in any order. After the program has been saved to the device and read back, the profile can be checked;...

  • Page 58: Setup Of A (Pressure) Safety Override For Time Control

    4.16.2 Setup of a (pressure) Safety Override for Time Control When time control is exclusively selected, a Safety Override control is made available. To use this feature, a Sentinel2 model with a pressure transducer for monitoring the downstream pressure is required to be installed.
  • Page 59 Units per pulse, for a flow pulse counter interface. It does not require adjustment). Since the pressure profile is dependent on Flow, certain settings in Sentinel 2 define what should happen if there is a fault detected in the Flow meter: The target pressure will be as per the setting “Default Pressure”.
  • Page 60 There should be some strategy employed to prevent the PRV being driven into making chaotic (frequent) pressure changes: Make a careful consideration as to the difference should exist between the Low and • High thresholds, (this is commonly known as “hysteresis”). Between the two thresholds there will be no change;...

  • Page 61: Setup Of Pressure Control Using A Combined Time And Flow Profile

    4.16.4 Setup of pressure control using a combined Time and Flow profile To use a pressure profile that is based on both time and Flow, tick both the “Time control” and “Flow control” options. … An additional choice becomes visible, which is required to be set.

  • Page 62: Save Program / Activating Sentinel Prv Control

    4.18 S ROGRAM CTIVATING ENTINEL CONTROL For Sentinel to be able to control the PRV using the current program settings (held by the IDT program), IDT must send the settings to the unit, which must then store it. Click on the “Setup Device” button, found by selecting the “setup”...

  • Page 63: Setting Logger Startup / Measurement Sample Rates

    The “Logging Parameters” panel shows timing parameters for the logger functions within Sentinel 2. For Sentinel 2, the built-in logger should be set for the measurement interfaces to be logged frequently. Therefore, set to “Log data at specified time interval”.

  • Page 64: Destination

    When Frequency is selected, it is not possible to add any additional lines to the table; just one exists. The frequency is set by entering the required time interval between call-ins. When time is selected, additional lines will automatically be added if a line is enabled (by selecting “On”) using the call-in control.

  • Page 65: Setting Network Access Parameters

    The remaining options in the “Data Destination” panel are related to potential power saving: The setting for “Logger is Battery Powered” does not matter for Sentinel2; It automatically detects if an external battery is connected during its operation. Data compression can be set to minimise length of messages and hence call times. When Sentinel2 operates with DataGate / PressView it should always be set to “Call in anyway”;...

  • Page 66: Communications / Antenna Location Check

    Alternatively, the user can enter the parameters for their fitted SIM card. If the connection requires authentication, enter the username and password for gaining access to the network connection. Note: The settings required will be provided by your system administrator. 4.21 C OMMUNICATIONS NTENNA LOCATION CHECK...
  • Page 67 Select the “Hardware tests” tab. Then click on the “Modem” button. The modem is the cellular communications module built into Sentinel 2. A new window will open with various types of modem tests. Click on the “CSQ” button. This measures the received signal strength, and a new measurement is made every few seconds.

  • Page 68: Verification Of The Configuration

    These can be supplied upon request at additional cost or sourced locally from a hardware store. To protect any required pressure transducers from frost, Sentinel 2 has the option of being supplied with external transducers, rather than internal transducers. This...

  • Page 69: Graphing / Data Download And Preview

    RAPHING DATA DOWNLOAD AND PREVIEW Measurements are saved by the Logger functionality built-into Sentinel. Measurements are normally incrementally uploaded to the DataGate server so that they can be: Viewed remotely. • Optionally, be used by a user of the PressView system to fine-tune the •...
  • Page 70 A graph will be displayed of the channels being logged. To zoom to specific times/dates, click and drag over the part of the screen required. Click the ”Zoom Full” button to show all data once more. A larger display can be shown by clicking the button shown opposite.

  • Page 71: Connection Information

    ONNECTION NFORMATION 6.1.1 FLOW Meter connection / cable RAG 93 Flow meter pulse unit cable (RAG R93). (Flow meter side: Volt-free) Open Collector (Sentinel2 side) LINK Contact Closure Connect the cable to the flow meter’s volt-free pulse interface: Use the green wire as ground. •...

  • Page 72: Maintenance, Service And Repair

    AINTENANCE ERVICE AND EPAIR Unauthorised servicing will void the warranty and any potential liability for “HWM-Water Ltd”. Electronic controller The built-in logger will continue to record data in its memory until the battery completely fails. The data logger cannot be downloaded after this condition occurs. Batteries Only use batteries and parts recommended and provided by HWM.

  • Page 73: Putting The Equipment Into Shipping Mode

    7.1.2 Putting the equipment into Shipping Mode Before long term storage, moving an installed unit, or shipping for repair, the Sentinel2 unit should be put into “Shipping mode”. Be sure to upload any unsent data before this operation. To put the Sentinel2 into shipping mode: Read the current configuration of the Sentinel2 using IDT.
  • Page 74 The unit will be re-programmed. • IDT will warn that the logger device has been stopped. Click “OK” and confirm that the • status of “(Stopped)” is shown at the top of the IDT Logger panel. Note: The unit may now be re-packed for shipping or long-term storage.

  • Page 75: Appendixa - Idt Options

    Pick a selection using the drop-down selector. This is entirely a user preference for using IDT. (Sentinel 2 is unaware of the user’s choice and is not in any way affected. IDT will convert between the display settings and the...
  • Page 76 Pick a Live Value Rate selection using the drop-down selector. The Flow selections are entirely a user preference for using IDT. (Sentinel 2 is unaware of the user’s choice and is not in any way affected. IDT will convert between the display settings and the units Sentinel 2 requires).
  • Page 77 Fluid Conservation Systems 1960 Old Gatesburg Road Ste #150 State College, PA 16801(800)531-5465 fluidconservation.com ©HWM-Water Limited. This document is the property of HWM-Water Ltd. and must not be copied or disclosed to a third party without the permission of the company. All images, text and designs are protected by international and UK copywrite law and remain the property of HWM-Water.

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