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London Electronics Limited
Thorncote Road, Near Sandy, Bedfordshire SG19 1PU
Tel +44(0)1767 626444
Fax +44(0)1767 626446
www.london-electronics.com help@london-electronics.com
Large display scalable process signal display
EasyReader Model ER4P
Connection details, scaling and general information
Rear case screws - please note
The rear panel is held in place with finger-screws, which
only need to be gently tightened.
Do not use tools to tighten or loosen the screws, as
this could cause damage to the internal threads.
Document Ref: manuals\english\EasyReader\EasyReader_4P.p65
Dated: 30 June 2009
Rev. 4
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Table of Contents
Related Manuals for London Electronics EasyReader ER4P
Summary of Contents for London Electronics EasyReader ER4P
- Page 1 London Electronics Limited Thorncote Road, Near Sandy, Bedfordshire SG19 1PU Tel +44(0)1767 626444 Fax +44(0)1767 626446 www.london-electronics.com help@london-electronics.com Large display scalable process signal display EasyReader Model ER4P Connection details, scaling and general information Rear case screws - please note The rear panel is held in place with finger-screws, which only need to be gently tightened.
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Page 3: Table Of Contents
Alphabetic Index Warnings - Read First ! Automatic zero drift correction Calibration method selection 6, 10 Calibration - Direct method Calibration - Theoretical method Calibration - Tamper detection Connections Wiring and jumper record sheet Count-By (last digit round-up) adjustment 7, 8, 9 Decimal point position selection 7, 8, 11 Declaration of Conformity... -
Page 4: Introduction
Introduction Please contact us if you need help, if you have a complaint, or if you have suggestions to help us improve our products or services for you. If you contact us about a product you already have, please tell us the full model number and serial number, so that we can give you accurate and fast help. -
Page 5: Warnings - Read First
Please carefully read all warnings and ONLY install the meter when you are sure that you’ve covered all aspects. Connect the meter according to current IEE regulations and separate all wiring according to IEC1010. Power supplies to this equipment must have anti-surge (T) fuses at 125mA for 230V supply, 250mA for 110V supply or 1A for DC supplies in the range 11-30VDC. -
Page 6: General Description
General Description The EasyReader displays are large versions of the popular “Intuitive” Lite process meter family. They use a dual slope integration method to give up to 9999 count resolution of +/-20mA or +/-10V analogue input signals. This allows for normal 4-20mA and 0-10V process signals with 9999 count resolution, and 1-5V process signals with at least 9999 count resolution. -
Page 7: Getting Started
Getting Started First, check that the display will suit your application and the available power source (either 95-265 VAC or 11-30 VDC). If you asked us to configure the display for you, please check that the scaling and settings agree with your requirements. -
Page 8: Connections
Connections We supply detachable screw terminal connectors to make installation as easy as possible for you. You should use multistrand insulated wire with ferrules to DIN46228/1. You can use stripped wire with cross sectional area from 0.5 to 2.5mm . Strip back insulation 7mm. 3 cable glands accept the 3 groups of cables up to 6mm diameter. -
Page 9: Calibration Method Selection
Calibration Methods There are two ways you can calibrate your meter. You can type-in theoretical calibration values, or you can connect the meter to your system and make the meter’s readings agree with known conditions in the system. 1) Calibration without the need for an input signal. This is known as the ‘THEORETICAL’... -
Page 10: Calibration - Theoretical Method
‘THEORETICAL’ Calibration Connect ‘Lockout’ terminal to ‘Common’ terminal. Disconnect the ‘calibration mode’ terminal from common. 1) How to set SPAN and DECIMAL POINT Press the SPAN button for 3 seconds. You’ll see ‘dC V’ or ‘dC A’ if the meter is set for DC Voltage or DC current. -
Page 11: Calibration - Direct Method
‘DIRECT’ Calibration Connect ‘Lockout’ terminal to ‘common’ terminal Connect ‘calibration mode’ terminal to ’common’ Connect the display to power and a steady input signal before you start. Leave the display powered for 15 minutes before you start, to allow it to reach normal operating temperature. 1) How to set the Span Calibration and Decimal Point position Apply 100% Cal. -
Page 12: Automatic Zero Drift Correction
Features Automatic Zero-Drift Compensation This cancels long-term zero drift due to ageing, temperature drift, etc. If the reading is within 7 counts of zero for around 100 seconds, the reading will go to zero without changing basic calibra- tion. The correction is not stored when the meter is switched off and is cleared with a RESET input. -
Page 13: Min/Max Button
Contact closure inputs The contact closure inputs allow you to operate the Tare, peak/valley and reset functions remotely, but only when the meter is ‘locked’ - see page 5. The switched signal is 5V DC at a current of 1.5mA Remote contact-closure inputs Common Calibration mode... -
Page 14: Front Panel Controls
Front panel controls Control Type 4 pushbutton switches located behind a flexible overlay. Function Depends on mode (whether locked or in setup mode) Also depends on remote input contact status - see below.. ZERO SPAN DIGIT Tare Min/Max Reset Contact-closure inputs are used to activate front-panel buttons Common Calibration mode Tare... -
Page 15: Specifications
Specifications Bezel size 415mm wide x 195mm high Case Depth 75mm Weight 900 grammes Case Material Black uPVC with Acrylic lens Connectors Internal Detachable Screw Terminal connectors Operating Temp. 0 to 50 degrees C, non condensing humidity Storage Temp. -20 to 70 degrees C Power supply 95-265 VAC or 11-30 VDC optional Power consumption... -
Page 16: Mounting Methods
How to Mount your display 1. Wall Mounting Wall mount your EasyReader display in a clean, dry environment. Drill 4 holes in your wall, spaced as you see in this diagram... The mounting screws you use should have a diameter between 3.4 and 4.6 mm and should be suitable for the material of the wall. -
Page 17: Suspension Mounting
How to Mount your display ... continued 1. Suspension Mounting Suspension mount your EasyReader display in a clean, dry environment. The mounting screws you use should have a diameter between 3.2 and 3.8 mm and should be suitable for the supporting material. You may need to use screw plugs or other screw accessories, if the material is not suitable to take screws directly. -
Page 18: Revision Record
Record of Revisions 16 December 2003 Product released 25 March 2004 Added Wiring and Jumper record sheet to page 16 8 November 2005 Added side view for wall mounting case on page 13... -
Page 19: Wiring And Jumper Record Sheet
Wiring and jumper record For future reference, record all the jumper positions and wiring colours you used in your installation. -
Page 20: Declaration Of Conformity
Signal cabling shall be routed separately to power carrying cabling (includes relay output wiring) All signal cabling shall be screened. The screen shall only be terminated to the power earth terminal Declared as true and correct, for and on behalf of London Electronics Ltd. J.R.Lees...