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Summary of Contents for Shaw AcuTrak
- Page 1 AcuTrak & AcuDew Inline Hygrometer Dewpoint Transmitter Instruction Manual Issue 1...
- Page 2 EU Declaration of Conformity Shaw Moisture Meters Len Shaw Building, Bolton Lane, Bradford, England, BD2 1AF Declare that Model Name: Shaw AcuTrak Description: Mains powered single channel moisture analyser with two alarms and 4-20mA output Conforms to the following Directives:...
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Page 3: Table Of Contents
1.5 Normal Operation ................. 8 1.6 Cleaning ..................8 1.7 Maintenance ................. 8 AcuTrak and AcuDew Transmitter Quick Start Guide ......9 Connecting the AcuDew ..............9 3.1 AcuDew 4 - 20 mA Cable Assembly ..........9 3.2 Wiring the AcuDew ..............11 3.3 AcuDew - Normal Operation ............ - Page 4 Appendix A - AcuTrak Setup Menu ..........41 Appendix B - AcuTrak Configuration Sub Menu ......... 42 Appendix C - AcuTrak Alarm, RS485 and Password Setup Sub Menu ..43 Appendix D - Default Instrument Configuration ......44 Appendix E – Communications Protocol ........45 Appendix F –...
- Page 5 Unpacking Your Shaw Moisture Meters AcuDew & AcuTrak Please examine the AcuDew package for any damage or mishandling. If any damage is evident please notify the carrier and the Shaw Moisture Meters representative from where this unit was purchased. You should have received (if ordered): ●...
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Page 6: Safety Instructions
AcuTrak, this manual must be examined carefully. Only qualified personnel (technicians) should install this AcuTrak. • If the AcuTrak is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired. Warning •... -
Page 7: Definitions
Trouble shooting of the AcuDew - AcuTrak system should only be carried out on a disconnected AcuDew - AcuTrak and under safe conditions. • Do not modify the unit. Repairs to the AcuTrak must be done by Shaw Moisture Meters or authorized distributors only. Warning •... -
Page 8: Normal Operation
1.5 Normal Operation Operators are only allowed to adjust and operate the AcuTrak when it is safely fixed to a panel, thus avoiding the danger of personal injury and damage. This means there is no electrical shock hazard and the AcuTrak front panel is easily accessible. -
Page 9: Acutrak And Acudew Transmitter Quick Start Guide
2 AcuTrak and AcuDew Transmitter Quick Start Guide The AcuDew Dewpoint Transmitter is a 2 wire, 4 to 20mA loop powered device, used for continuous measurement of moisture in process gases, including the most common application, compressed air. The AcuDew transmitter is configured to output a 4 to 20mA linear signal for the following moisture units: •... - Page 10 Gently push the AcuLoop display on to the AcuDew turning the locking ring clockwise to secure. 3.1.3 Connecting the AcuDew to an AcuTrak The AcuTrak displays a digital readout of the 4-20 mA input signal derived from an attached AcuDew. The AcuTrak indicator has: A five digit, red LED display, relay •...
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Page 11: Wiring The Acudew
3.2 Wiring the AcuDew The AcuDew is a 2-wire, 4-20 mA transmitter. Typical electrical connection to generate a voltage output is shown below. Note: the maximum value for Rs in this circuit can be calculated by the formula: Rs max = [40 x (Vs – 7)]Ω If the wiring resistance is S D T expected to be more than a... -
Page 12: System Components
4 System Components 4.1 AcuDew The AcuDew Dewpoint Transmitter is a 2 wire, 4 to 20mA loop powered device, used for continuous measurement of moisture in process gases, including the most common application, compressed air. The AcuDew transmitter is configured to output a 4 to 20mA linear signal for the following moisture units: •... - Page 13 Section 9 of this operating manual details the available methods offered by the AutoCal feature. The rugged mechanical design and the industrial type transmitter cable connector of the AcuDew, including its stainless-steel construction, provide outdoor environmental protection to NEMA 4X (IP66). The AcuDew transmitter can withstand maximum process pressures of 350 bar (5000 psig) and support cable lengths up to 1000 meters (3200 feet).
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Page 14: Acutrak
• AC or DC voltage supply versions available 4.3 AcuTrak/AcuDew System Application The AcuTrak displays a digital readout of moisture content, derived from the AcuDew. 5-digit, 8 segment, Red LED indicator, relay ON/OFF indication. Programmed to the range of the AcuDew. Process control with 2 adjustable alarm set points and an analogue output. -
Page 15: Mounting The Acutrak
AcuTrak. Should there be any doubt as to the correct handling of the AcuTrak, please contact your local dealer. Mounting and connection of the AcuTrak should comply with the National Electric Code for the mounting of electric materials, i.e. -
Page 16: Acudew System Installation
The AcuDew is a 2-wire 4 to 20mA transmitter, loop powered by 12 to 28V DC. Notes: Pin 1 connects to the power supply (red wire in a Shaw Moisture Meters supplied transmitter cable). Pin 2 connects to the 4 to 20 mA current loop return (blue wire in a Shaw Moisture Meters supplied transmitter cable). -
Page 17: Acudew Installation: Direct Into Process Line
The process thread on the AcuDew is ¾”-16 UNF straight thread. The process seal is a Viton O-ring, so pipe thread tape should not be used on the threads. SHAW offers a standard sensor holder for installation of the AcuDew, typically on a sample line or sample system. -
Page 18: Instrument Air / Inert Gas Sampling System
6.4 Instrument Air / Inert Gas Sampling System The piping installation schematic diagram shows all components which could be used in a dry gas measurement application, although not all the items shown will be required for every installation. MAIN PROCESS LINE Notes a. -
Page 19: Piping Schematic Component Index
6.5 Piping Schematic Component Index Sample Isolation Valve - This is a recommended item as it allows access to the sample system without interrupting the main process line. Filter Unit – A filter unit is recommended when the samples are likely to contain particulate matter. -
Page 20: Installing And Commissioning The Acudew Transmitter
6.6 Installing and Commissioning the AcuDew Transmitter It is advisable to carry out an initial purge routine of the sample loop, before installing the sensor, in order to remove the possibility of sensor damage on start-up. Refer to the sample system schematic on page 18 of this manual and open the inlet isolation valve slowly, until a small flow of air/gas at atmospheric pressure flows through the inlet pipework to the sensor holder and exhausts through the sensor entry port of the sensor holder. -
Page 21: Wiring The Acudew And Acutrak
Should it be necessary, at any time or for whatever reason, to change either the AcuTrak or AcuDew, it should be noted that the components of the system are fully and completely interchangeable provided that the same 4 to 20mA range is maintained. -
Page 22: Analogue Output And Serial Communications Cable
7.4 Analogue Output and Serial Communications Cable Make the appropriate connections, ensuring that the correct polarity and the maximum load specification are strictly observed on connector 2. 7.5 Rear Connections: Viewed from the rear and on the left is the AcuDew sensor input. Alarm 1 Alarm 2 AC Wiring... -
Page 23: Connecting An Acudew To A Acutrak
4 to 20mA input signal derived from an attached AcuDew. The AcuTrak has a 5 digit, 8 segment, red LED indicator, characters size 15mm, relay ON/OFF indication. Process control with 2 adjustable alarm set points and an analogue output. -
Page 24: Acutrak User Interface And Controls
User Input and Hotkeys AcuTrak DEWPOINT HYGROMETER Every key on the AcuTrak has two functions, the control function ( & ) and the hotkey function (menu, units, alarm 1 and alarm 2). The use of these commands is described in the following table:... - Page 25 ● A user controllable security system. ● The AcuTrak has two full range alarms that can be set as rising or falling edge triggered. These alarms have visual indication (LEDs) and activate changeover relays for remote indication or control. ●...
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Page 26: Hot Keys
°C and °F are fixed to 1 decimal place. Note: The Password used within the AcuTrak is made of four integers and does not use the dp. Note: To leave the numerical part of this routine without saving, simply press key. - Page 27 Press the key at any time sets the currently displayed units as the AcuTrak active unit. For example: To change from a ‘dewpoint °C’ to a ‘dewpoint °F’, whilst UnitS is displayed press the key to enter the subroutine.
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Page 28: Using The Acutrak Setup Menu
The rAngE option allows the user to select the required sensor range. This option is used to match the AcuTrak to the sensor connected to the unit. Press the while rAngE is displayed to enter the submenu. The currently selected range is displayed. -
Page 29: Configuration Parameters
8.4 Configuration Parameters (See Appendix B Configuration Sub Menu) 8.4.1 Choosing Moisture Units The UnitS sub menu allows the user to alter the displayed units. While UnitS is displayed press the key to enter the sub menu. The currently selected unit is displayed. -
Page 30: Analogue Output
Gas correlation. If No, the sensor follows the ideal gas linearisation. 8.5 Analogue Output The AcuTrak features an analogue output port which the user may use to retransmit the moisture reading to another system. The output benefits from galvanic isolation and segregation by isolated electrical circuits. - Page 31 4 to 20 mA. Therefore using the above example the port will output 4mA when the AcuTrak displays -80°C dewpoint. And 20mA when the AcuTrak displays +20°C dewpoint. If a sensor is detected as short circuit then the current output will rise to +20.25mA.
- Page 32 For example: Moving the lower scale point from -80°C dewpoint to –60°C may be desirable and can be achieved by the following entry to the instrument configuration. When OutPt is displayed press the key to enter the routine displaying SPAn. Use the key to select either the Hi or Lo mA setting.
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Page 33: Alarms
A single instrument may be connected using the universal address of 0. Up to 32 instruments may be connected using addresses 1 to 32 Note: Do not use the universal address 0 when 2 or more AcuTrak are connected together. The instrument is the slave and must be poled for data. -
Page 34: Security Passwords
Refer to Appendix E for communications protocol. 8.8 Security Passwords The PASS function allows the user to protect certain functions within the AcuTrak. While PASS is displayed press the key to enter the sub menu. The unit displays SEtPt. Use the key to select the required function and then press key. -
Page 35: Panel
8.9 Panel The panel option allows the user to restrict the function of the front panel Hot Keys. If the option is selected, the Hot Keys are restricted. While panel is displayed press the to enter the sub menu. The main display now displays either on or oFF. -
Page 36: Types Of Autocal
The AutoCal feature is controlled by an adjustable potentiometer located under the weatherproof guard. Note: The AcuDew must be powered by an AcuTrak or AcuVu or some other device able to supply 4 to 20mA loop power. -
Page 37: Known Moisture Level Autocal - Method 2
9.3.2 Performing an AutoCal in ambient Not available on AcuDews with an upper range (wet-end) above 0°C, 32°F or 6032ppm(v). After allowing the sensing element to stabilize, the following sequence should be followed: Locate and remove the large screw from the side of the AcuDew. The screw is retained by the sealing gasket. - Page 38 Locate and remove the large screw from the side of the AcuDew. The screw is retained by the sealing gasket. Ensure that the AcuDew has been powered up for longer than 90 seconds. Note: Because the AcuDew has been pre-conditioning for a period of time, the power supply is not likely to be have been recently interrupted.
- Page 39 The instrument should not require any routine maintenance, but if any malfunction is suspected, it is advisable to contact your local dealer. Should it be necessary at any time or for whatever reason, to change either the AcuTrak or AcuDew, it should be noted that they are both completely interchangeable.
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Page 40: Error Messages
11 Error Messages Message Description Sensor or sensor cable is short-circuited. The current output ----- will drive to 20.25 mA. Please contact your local dealer. Attempt was made to change displayed units or Alarm Set point rOnLY when Hot Key settings editing is prevented by PANEL submenu. Refer to Section 7 for more information. -
Page 41: Appendix A - Acutrak Setup Menu
12 Appendix A - AcuTrak Setup Menu... -
Page 42: Appendix B - Acutrak Configuration Sub Menu
13 Appendix B - AcuTrak Configuration Sub Menu... -
Page 43: Appendix C - Acutrak Alarm, Rs485 And Password Setup Sub Menu
14 Appendix C AcuTrak Alarm, RS485 and Password Setup Sub Menu... -
Page 44: Appendix D - Default Instrument Configuration
15 Appendix D - Default Instrument Configuration Configuration Contains submenus for choosing engineering units, choice of gas types: Defaults are: • the moisture content in °C dewpoint • the ppm(w) calculations use the gas type as Air • the model for natural gas is disabled •... -
Page 45: Appendix E - Communications Protocol
16 Appendix E – Communications Protocol RS485 Request Protocol (as seen by AcuTrak) Byte Description 0, first Preamble Master-to-Slave Address 0 to 32 Command Data Length Data Bytes 10, last Checksum 8-bit Arithmetic Exclusive-Or of bytes 5 to 9 RS485 Reply Protocol (as seen by AcuTrak) - Page 46 Reply Status Description 15, first (ms) Not defined Alarm 2: user to clear Alarm 1: user to clear Alarm 2 Alarm 1 Not defined Sensor short Not defined 0, last (ls)
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Page 47: Appendix F - Acudew Cable Assembly
17 Appendix F – AcuDew Cable Assembly... -
Page 48: Acutrak General Assembly Diagram
18 AcuTrak General Assembly Diagram FRONT SIDE REAR... -
Page 49: Transmitter Diagram
19 Transmitter Diagram 20 Sensor Holder Diagram 4 Mounting Holes 5.5 mm ø ( 0 " ø ) ⁄ 54 mm ( 2 " ) 60 mm ( 2 " ) ⁄ ⁄ 46 mm ( 1 " ) 38 mm ø ( 1 "... - Page 50 AcuTrak & AcuDew Instruction Manual_Issue 1 © SHAW MOISTURE METERS UK (LTD) 2021 Shaw Moisture Meters (UK) Ltd. Len Shaw Building Bolton Lane Bradford BD2 1AF England t. +44 (0)1274 733582 f. +44 (0)1274 370151 e. mail@shawmeters.com www.shawmeters.com...
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