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Macnaught ERST-RM Instructions Manual

Flowrate indicator / totalizer
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MXL-INST_ERST
REV 1
03/20
FLOWRATE INDICATOR / TOTALIZER
ERST-RMA (F127-P-AP-CX-EL-HA-OT-PD-TP-XX-ZB)
To the Owner
Please read and retain this instruction manual to assist you in the operation
of this product. This Instruction Manual provides instruction guide on the
operation and programming of the Type ERST, 17 mm LCD Digital Register.
Should you require further assistance please contact your local Macnaught
representative. Macnaught offer a comprehensive set of web-based
support materials to complement our product range. Access the instruction
manual by scanning the QR code.
Electronic Register (ERST)
REMOTE MOUNT
Signal input flowmeter: Reed and NPN
Signal input temperature: PT100
Output: 4-20mA, corrected flow rate, scaled pulse ref.
accumulated total, Backlight

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Summary of Contents for Macnaught ERST-RM

  • Page 1 This Instruction Manual provides instruction guide on the operation and programming of the Type ERST, 17 mm LCD Digital Register. Should you require further assistance please contact your local Macnaught representative. Macnaught offer a comprehensive set of web-based support materials to complement our product range.

  • Page 2: Table Of Contents

    CONTENTS MANUAL Content’s manual Safety instructions Disposal of electronic waste Safety rules and precautionary measures About the manual Warranty Introduction System description (functions and features) Operational Control panel Operator information and functions CONFIGURATION Introduction How to program the ERST (Programming Set-up Level) Setup menu - Settings Explanation of SETUP Explanation of SETUP-menu 1 - Total-A...

  • Page 3: Safety Instructions

    SAFETY INSTRUCTIONS • Any responsibility is lapsed if the instructions and procedures as described in this manual are not followed. • LIFE SUPPORT APPLICATIONS: The ERST is not designed for use in life support appliances, devices, or systems where malfunction of the product can reasonably be expected to result in a personal injury.

  • Page 4: About The Manual

    These provide a detailed description of all software settings and hardware installation guidance. This manual describes the standard Macnaught unit (ERST – F127-P). For additional information, please contact your supplier. A hazardous situation may occur if the ERST is not used for the purpose it was designed for or is used incorrectly.

  • Page 5: Introduction

    INTRODUCTION 1.1 SYSTEM DESCRIPTION (Functions and features) The flow computer, model ERST is a microprocessor driven instrument for the calculation of differential flow measurement applications using flow equations for liquids. This product has been designed with a focus on: • two multi-purpose pulse inputs;...

  • Page 6: Operational

    Configuration of the unit The ERST is designed for use in many types of applications. For that reason, a setup menu is available to program the ERST according to your specific requirements. The setup includes several important features, such as K-Factors, engineering units, signal selection, power management (to extend battery life-time), etc.

  • Page 7: Operator Information And Functions

    This key is used to reset the total. The “CLEAR”is also used to select a digit or an option after the PROG/ENTER key has been pressed (read chapter 3). 2.2 OPERATOR INFORMATION AND FUNCTIONS In general, the ERST operates in the operator mode. The shown information depends on the settings which are made in the setup menu.

  • Page 8: Configuration

    Low-battery alarm At the end of the battery’s life-time, the voltage starts to drop. When the voltage becomes too low, the battery indicator comes on. When the battery indicator is on, install a new and fresh battery as soon as possible.
  • Page 9 SCROLLING THROUGH SETUP-LEVEL Selection of function-group and function: SETUP is divided into several function groups and functions. Each function has a unique number, which is displayed below the word "SETUP" at the bottom of the display. The number is a combination of two figures. The first figure indicates the function-group and the second figure the sub-function.

  • Page 10: Setup Menu - Settings

    To change or select a value:   To change a value, use to select the digits and to increase that value.   To select a setting, is used to select in one direction and can be used to select in the other direction. ...
  • Page 11 k-factor 0.000010 - 9,999,999 decimals k-factor 0 - 6 filter 0 - 99 period 0.1 - 99.9 seconds TOTAL-B K-factor: 0.000010 - 9999999 decimals K-factor 0 - 6 FLOWRATE-B K-factor 0.000010 - 9999999 decimals K-FACTOR 0 - 6 DISPLAY function total;...

  • Page 12: Explanation Of Setup

    3.4 EXPLANATION OF SETUP-FUNCTIONS 1 – TOTAL-A MEASUREMENT UNIT SETUP - 11 determines the measurement unit for total and accumulated total. The following units can be selected: L - m³- kg - lb. - GAL - USGAL – bbl. - (no unit) Alteration of the measurement unit will have consequences for operator and SETUP- level values.

  • Page 13: Explanation Of Setup-Menu 3 - Total-B

    00000 - 1111.1 - 2222.22 - 3333.333 K-FACTOR With the K-factor, the flowmeter pulse signals are converted to a flowrate. The K-factor is based on the number of pulses generated by the flowmeter per selected measurement unit (SETUP 21), for example per litre. The more accurate the K-factor, the more accurate the functioning of the system will be.

  • Page 14: Explanation Of Setup-Menu 5 - Display

    DECIMALS K-FACTOR This setting is used to set the number of digits behind the decimal point for the K- Factor (B). 5 - DISPLAY FUNCTION This setting can be set to display total or rate. • When 'total' is selected, simultaneously, total is shown with the large digits and flow rate with the smaller digits.

  • Page 15: Explanation Of Setup-Menu 7 - Flowmeter

    LCD NEW The calculation of the display-information influences the power consumption significantly. When the application does not require a fast display update, it is strongly advised to select a slow refresh rate. Please understand that NO information will be lost; every pulse will be counted and the output signal will be generated in the normal way.

  • Page 16: Explanation Of Setup-Menu A - Analog Output

    Q: measured volume α: thermal expansion coefficient T-normal: reference temperature T: measured temperature Enter here the thermal expansion coefficient (α) for the liquid used. The value to be THERMAL EXPANSION entered has to be multiplied with 1000. The decimal position is fixed but cannot be COEFFICIENT shown.

  • Page 17: Explanation Of Setup-Menu B - Impulse

    TUNE MAX / 20MA 66 The initial maximum analog output value is 20mA. However, this value might differ slightly due to external influences such as temperature for example. The 20mA value can be tuned precisely with this setting. Before tuning the signal, be sure that the analog signal is not being used for any application! After pressing PROG, the current will be about 20mA.

  • Page 18: Explanation Of Setup-Menu C - Others

    It might be that pulses will be missed due to a buffer-overflow, so it is advised to program this setting within its range! Decimals This setting is used to set the number of digits behind the decimal point for the amount. Amount A pulse will be generated every time a certain quantity is added to the total.

  • Page 19: Dimensions- Enclosure

    • Take the relevant IP classification of the casing into account (see manufactures plate). Even an IP67 (NEMA 4X) casing should NEVER be exposed to strongly varying (weather) conditions. • When used in very cold surroundings or varying climatic conditions, take the necessary precautions against moisture by placing a dry sachet of silica gel, for example, inside the instrument case.

  • Page 20: Installing The Hardware

    4.4 INSTALLING THE HARDWARE • Electro static discharge does inflict irreparable damage to electronics! Before installing or opening the unit, the installer has to discharge himself by touching a well-grounded object. • This unit must be installed in accordance with the EMC guidelines (Electro Magnetic Compatibility).
  • Page 21 It is possible to use some low power NPN output signals, but the battery life time will be significantly reduced (consult Macnaught). Warning: be sure that all the leads to the terminals are disconnected from the unit when the internal plastic protection cover has been removed! First, remove the terminal strip(s) after which the internal plastic cover can be removed.

  • Page 22: Terminal Connectors

    4.6 TERMINAL CONNECTORS The following terminal connectors are available: Fig. 7: Overview of terminal connectors standard configuration ERST and options. Terminal GND- 01- 02: Power Supply and Backlight: Type Sensor Supply Terminal Backlight 8 - 30 V DC 3.2 / 8.2 / 12 / 24V max. DC - DC + ◊...
  • Page 23 Fig. 8: Terminal connections - Pulse output (typical) Terminal 07-08; Analog Output - output loop powered Connect an external power supply of 8 – 30 VDC to these terminals for passive 4-20mA loop. Do connect the "-" to terminal 7 and the "+" to terminal 8. When power is applied to these terminals, the (optional) internal battery will be disabled / enabled automatically to extend the battery life time.

  • Page 24: Maintenance

    Fig. 10: Terminal connections - NPN signal input (typical) Reed-switch: The ERST is suitable for use with flowmeters which have a reed-switch. To avoid pulse bounce from the reed-switch, it is advised to select REED LP - low-pass filter (read chapter 3). Fig.

  • Page 25: Instructions For Repair

    occur, e.g. to put a dose of desiccant (drying agent) inside the enclosure just before closing it. Furthermore, it is required to replace the desiccant periodically as advised by its supplier. Battery life-time: It is influenced by several issues: • Type of sensor (read chapter 3): NPN inputs consume more energy than coil inputs;...

  • Page 26: Appendix A: Technical Specifications

    APPENDIX A: TECHNICAL SPECIFICATIONS GENERAL Display Type High intensity reflective numeric and alphanumeric LCD, UV-resistant. Dimensions 90 x 40mm (3.5”x 1.6”) Digits Seven 17 mm (0.67") and eleven 8 mm (0.31"). Various symbols and measuring units. Refresh rate User definable: 8 times/sec - 30 secs. Backlight LCD with green LED backlight.
  • Page 27 Temperature range -100°C to +200°C (-148°F to 392°F) Update time four times a second NOTE: The linearity is internally compensated. OUTPUTS Analog Output Function Transmitting calculated differential or sum flowrate. 10 bits. Error < 0.05% - update 10 times a second. Accuracy Software function to calibrate the 4.00mA and 20.00mA levels precisely within set-up.

  • Page 28: Appendix B: Problem Solving

    APPENDIX B: PROBLEM SOLVING In this appendix, several problems are included that can occur when the ERST is going to be installed or while it is in operation. Flowmeter does not generate pulses: Check: • Signal selection • Pulse amplitude •...

  • Page 29: List Of Figures In The Manual

    ALARM When the alarm flag starts to blink an internal alarm, condition has occurred. Press the "select button" several times to display the error code. When multiple errors arise at the same time, their error codes are added and their sum is shown. The digital [d] codes are: Not recoverable by the end user: [d] 0 = No error;...

  • Page 30: List Of Configuration Settings

    LIST OF CONFIGURATION SETTINGS SETTING DEFAULT DATE: DATE: 1 - TOTAL A Enter your settings here 11 unit 12 decimals 13 K-factor 0000001 14 decimals K-factor 2 - FLOWRATE A 21 unit 22 time unit /min 23 decimals 0000000 24 K-factor 0000001 25 decimals K-factor 26 filter...
  • Page 31 0000000 B4 amount 1000 C - OTHERS C1 model ERST C2 Software Version C3 Serial number C4 pass code 0000 C5 tagnumber 0000000 Macnaught Pty Ltd 41 - 49 Henderson Street Turrella, NSW, 2205 Australia Website: www.macnaught.com.au Support: info@macnaught.com.au MXL-INST_ERST...

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F127-p-ap-cx-el-ha-ot-pd-tp-xx-zb

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