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Document Ref: manuals\english\EasyReader\EasyReader_2C.p65 Dated: 30 June 2009

Rev. 4

Large display pulse input counter & frequency meter

EasyReader Model ER2C

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.

London Electronics Limited

Thorncote Road, Near Sandy, Bedfordshire SG19 1PU

Tel +44(0)1767 626444 Fax +44(0)1767 626446

www.london-electronics.com [email protected]

Содержание EasyReader ER2C

Страница 1: ...ormation 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 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 ...

Страница 2: ......

Страница 3: ... Description 3 Getting Started 4 Input stage circuit 13 Introduction 1 Input connection examples 5 Lockout connection 5 7 8 MIN MAX button 9 10 Mounting methods 13 14 Peak reading memory 9 10 RESET button 9 10 Revision record 15 Specifications 11 Suspension mounting 14 TARE control 9 10 Valley reading memory 9 10 Wall Mounting 13 Warnings 2 index ...

Страница 4: ...lent replacement Or we may have no stock at the time you urgently need it You may also need to pay extra carriage charges if you want a fast guaranteed courier service Warranty repairs or replacements are normally returned with a standard courier service We do not offer any compensation for losses caused by failure of this instrument If you do not agree with these conditions please return this ite...

Страница 5: ...or 110V supply or 1A for DC supplies in the range 11 30VDC Check that the model number and supply voltage suit your application before you install the meter Don t touch any circuitry after you have connected the meter because there may be lethal voltages on the circuit board We designed this meter for Pollution Degree 2 environments only This means you must install it in a clean dry environment On...

Страница 6: ...cy and speed They also accept quadrature input signals so are ideal for bidirectional position monitoring too Their unique INTUITIVE programming system gives the simplest possible setup procedure You can scale the counter and ratemeter so that a given number of pulses gives a certain display value The scaling is digital and highly stable thanks to a trimmed quartz crystal timing oscillator Scale f...

Страница 7: ... useful to check that everything works as needed Remove the screws which hold the rear panel in place Feed the signal and power cables through the cable glands Connect the signal and power cables to the appropriate screw terminal connectors See our connection drawing to check that you are using the correct terminals Check before switching on that the power is suitable for the unit Switch on and th...

Страница 8: ...ked Unlocked Locked Unlocked Excitation Input 2 Input 1 Common Lockout Excitation Input 2 Input 1 Common Lockout You can operate the Tare Peak Valley and Reset functions remotely with contact closures or with the front panel buttons To activate the front panel buttons you must make permanent connections between the desired function connector and Common Off On for contact closure inputs Pullup down...

Страница 9: ...up or negative count down scale factor The gate is on INPUT2 Gate open HI Gate closed LOW 3 Totaliser 1 pulse input and 1 direction input If you use a positive scale factor the counter will increase for pulses on INPUT1 if INPUT2 is high decrease if INPUT2 is LOW 4 Totaliser 1 input UP count 1 input DOWN count Pulses on INPUT1 count down Pulses on INPUT 2 count up 5 Totaliser with 2 pulse inputs f...

Страница 10: ...IGIT button to select other digits Select decimal point with the DIGIT button if you want to change the decimal point position Move the decimal point with UP DOWN buttons Press OK when you have set the whole number to move on to the next variable Pulses In Display Preset pre load The value you can set for each of these 3 variables You have a rotary encoder which gives 5000 pulses per rotation 360 ...

Страница 11: ...quency For example if you have a sensor which gives 200Hz at 5 litres per minute and you want to measure flowrate in litres minute F in 200 disp 5 or 5 0 or 5 00 depending on the resolution you want Possible values 0 2 4 8 16 32 and 64 Averaging is useful if the input frequency is not stable The bigger the averaging number the more stable will be the display Big averaging numbers also make the dis...

Страница 12: ...econds If you make a permanent connection between Common and Min Max you can access this function with the button labelled Max Min on the display s front panel RESET In any one of the 6 Totalsing modes contact closure will reset the accumulated total In Rate mode Contact closure will reset the stored Max and Min and averaging history values If you make a permanent connection between Common and Res...

Страница 13: ...ked Mode Press for more than 3 seconds Lets you adjust the functional mode of the display if the display is unlocked DIGIT Chooses a digit to be changed on the display while adjusting a variable when the display is unlocked UP arrow Each press increases a chosen digit value while adjusting a variable when the display is unlocked DOWN arrow Each press decreases a chosen digit value while adjusting ...

Страница 14: ...umpers 0 to 50 KHz scalable Operating Overload Can accept up to 60V without damage Display type High efficiency LED red or green Digit height 57mm A 102mm high model is also available Viewing distance 25 metres 50 metres with 102mm digit model Accuracy 0 05 of range 2 counts in Frequency mode Scaling tempco 20ppm Degree Celsius max for Rate Frequency Excitation voltage 24VDC 20 rated at 100mA Nois...

Страница 15: ...p Pull Down Debounce 3V 1V 20mV Threshold Input comparator 47K 18K 0 1uF Excitation Input Common Circuit diagram showing one of the two input stages This shows the pullup debounce and sensitivity setting methods 12 ...

Страница 16: ... the wall material is not suitable to take screws directly Route cables neatly away from the display If the cables may become damaged in the environment protect them with suitable conduit or trunking 253 mm Place the brackets as shown so that the display covers the 4 mounting screws 211 mm The 4 bracket holes are all 5mm diameter Fit the brackets to the wall Then fit the display between the bracke...

Страница 17: ...ay need to use screw plugs or other screw accessories if the material is not suitable to take screws directly Mount the brackets first then fit the display to the brackets Route cables neatly away from the display If the cables may become damaged in the environment protect them with suitable conduit or trunking 85 0 mm 85 0 mm View down onto top of bracket 3 holes 4 5mm diameter M8 Spring Washer M...

Страница 18: ...Record of Revisions 30 January 2004 Product released 16 February 2004 Added input stage diagram to page 12 25 March 2004 Added wiring and jumper record sheet on page 16 30 June 2009 Address updated 15 ...

Страница 19: ...Wiring and jumper record 16 For future reference record all the jumper positions and wiring colours you used in your installation ...

Страница 20: ... to the power earth terminal This is to confirm that the Product covered by this declaration has been designed and manufactured to meet the limits of the following EMC Standard EN61326 1 1997 and has been designed to meet the applicable sections of the following safety standards EN61010 1 2001 Declaration Reference EasyReader Issue Date 16 December 2003 Products Covered EasyReader series Title DOC...

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