London electronics R175x series User manual

NPN, PNP, Contact Closure, TTL, CMOS logic Inputs

Including Sensor Excitation and RS485 Data Output

Scaleable Ratemeters

R175X Series of Large Displays

Rev. 11.0 30 June 2008

Doc. R17CE.pm5

User's Manual

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]

CONTENTS.

SECTION

PAGE

INTRODUCTION................................................................................................ 3

1.0 UNPACKING AND INSPECTION................................................... 4

2.0 GENERAL INFORMATION............................................................ 4

2.1 General specifications........................................................................... 5

3.0 INTERNAL CABLES........................................................................ 6

3.1 Signal cables......................................................................................... 6

3.2 Mains cables......................................................................................... 6

4.0 DETAILED OPERATING INFORMATION

4.1 Pulse I/P Selection................................................................................ 7

4.1.1 Jumper Functions and Positions............................................................ 7

4.2 Typical Input connections..................................................................... 8

4.3 RS485 output option notes..................................................................... 8

4.4 Contact Closure Remote Programmer connections............................... 9

4.5 Programming your display................................................................... 9

4.6 The Programming Menu & Brightness adjustment................................ 10

4.7 Programming Flow Chart..................................................................... 11

4.8 Application Example............................................................................ 12

5.0 INSTALLATION............................................................................... 13

5.1 Mounting positions.............................................................................. 14

5.2 Panel mounting.................................................................................... 14

5.3 Wall mounting...................................................................................... 14

5.4 Suspension mounting........................................................................... 14

5.5 Multiple display mounting.................................................................... 15

6.0 TROUBLE SHOOTING AND MAINTENANCE............................ 15

7.0 SAFETY CONSIDERATIONS..N................................................ 15

8.0 WARRANTY...................................................................................... 16

9.0 OTHER LONDON PRODUCTS...................................................... 17

10.0 AND FINALLY................................................................................... 18

THE RATEMETER MODEL - R175X

INTRODUCTION

The R175X is one member of a broad family of Large Displays. The family is the '1700 Series', and

the part number tells you a little about the display's function......

R175X

This model is intended for large measurement display use. It accepts the most commonly encountered

proximity sensors, of NPN or PNP type, contact closures, TTL and CMOS logic levels.

The incoming signal can be measured over a choice of gate times, and the readings can be averaged

over a number of gate periods, givin very long effective average measurements. This allows the rate

over an 8 hour shift to be accurately shown, for example, though the display is similarly well suited

to displaying powerline frequency.

If specifically ordered , we can supply the displays with a silk screened legend identifying the

measurement being displayed, for example, units/hour, bottles/shift etc..

An optional RS485 output is available , useful for feeding remote mimic displays. If you require serial input

only, and do not require analogue input, a simpler, model is available, S17XX series. The serial input

models can have 5 or 7 digits.

The configuration settings and calibration constants of the display are stored in non-volatile E2PROM

memory, which is retained for at least 10 years. Change to the settings is achieved by way of remote

contact closure inputs, allowing alteration of the unit’s configuration menu, calibration and brightness.

The case is sealed to IP65, and the lens is 4mm thick polycarbonate, making it ideal for use in food

industry washdown applications.

'17' identifies the model as

being in the 1700 series

Tells us how many digits the display has

(5 always for this model)

Tells us how many

inches high the digits are

'R' for Rate I/P

PLEASE check the carton’s contents as soon as possible after receipt, to detect any transit damage or

losses.Unpack the contents and check each item in the box against the check list below to make sure you

have all items.

Check List :

Handbook

Display

Mounting kit ( where appropriate )

Programming Unit ( If Ordered )

In the event of damage, please contact the carrier and advise our sales office of the fault.

Please retain the carton packing material, for future possible use.

2.0 GENERAL INFORMATION

This handbook covers the Ratemeter model of the 1700 series large displays.

The 1700 series is a family of units for broadcasting process values and data on easy to read large

7 segment displays. Character heights of 2", 4" or 6" are standard, and, dependent on type, displays

are 5 or 7 digit. Extra-large and Daylight viewing displays are available to special order.

The enclosures for the displays are of welded UPVC material with tough lenses, providing certified

protection to IP65/66 for the internal electronics. Thermostatic heater options may be installed for

outdoor mounting in cold climates.

Case colours are white or black.

The units incorporate a 95 to 265VAC power supply ( Which can be used on DC in the range 100 to

300 VDC ) for operation off any mains source without the need to re-configure.

Display brightness is settable to 4 levels to accommodate differing ambient light conditions and the

3 standard character heights provide a choice of viewing distances of up to 20, 40 and 60 metres.

Other character heights and brightnesses are available to special order.

The large displays are based around a common power and control card which is linked to display

units of different sizes.

Instrument behaviour is set by way of remote contact closure pushbuttons, which provide access to

and alteration of the instrument’s menu, and the settings are stored in 10 year non-volatile memory.

2.1 GENERAL SPECIFICATIONS

Display type Scaleable rate/frequency meter, adjustable averaging and

resolution

Signal inputs Contact closure, NPN, PNP, 5V TTL/CMOS, 24VDC

Debounce jumpers available, limiting inputs to <10Hz.

Max I/P rate without debounce = 10Khz.

Input Resistances: 2200 Ohms if internal pull-up/down enabled. Otherwise 10M

Excitation Supply: Nominally 13VDC at 60mA max.

Accuracy: 0.01% of range , 20ppm/oC Quartz Crystal controlled

Scaling Scale fully adjustable remotely.

Decimal point position selectable

Optional Signal Output RS485 at 300, 1200, 2400 or 9600 Baud

Data format Serial ASCII at 300,1200,2400 or 9600 baud; 1 start bit,

8data ( or 7 data plus parity ) and 1 or more stop bits.

Handshake No handshake, unit always transmits data

Case material: UPVC, White or Black

Case size:(mm WxH) 5 digit 7 digit

2" 288x120 384x120

4" 480x168 672x168

6" 624x192 864x192

Case depth : 90mm ( 115 mm including rear cable/glands)

Weight : 5 digit 7 digit

2" 2.5Kg 3Kg

4" 4.5Kg 5Kg

6" 5.0Kg 6Kg

Display type:

2" digit height High efficiency red LED 57mm high 7 segment display tiles

4" digit height Ultrabright red LED 102mm high 7 segment display tiles

6" digit height 144mm high characters formed from twinned individual

5mm round red LEDs

Daylight viewing versions, whether 2", 4" or 6" are made up of individual 5mm round lensed LED's

Power supply : 95-264VAC, 100 to 300 VDC, Via Rectifier, non-specific polarity

Power consumption : 20W typ. without thermostatic heater.

3.0 INTERNAL CABLES

The units are supplied with approximately 2 metres of free ended cable for mains, signal and serial ports.

You may connect your own cable to this, via a junction box, or completely remove the supplied cable and

install your own.

REMEMBER The signals you will be feeding to the displays are quite small in comparison to some of the

undesirable ‘noise’generated by certain types of common electrical equipment. To obtain the highest degree

of accuracy and reliability from your indication equipment, we strongly suggest that you....

DO NOT run signal cables adjacent to power/switching lines or near equipment liable to generate large

amounts of electrical noise, such as contactors, solenoids, fluorescent tubes, discharge lamps, motor control

equipment, etc.

Do use screened, twisted-pair extension cable to minimise the amount of noise being fed into the display.

WARNING: RISK OF LETHALELECTRICAL SHOCK

YOU MAYNEED TO OPEN THE CASE TO ALTER JUMPER POSITIONS OR TO PANEL MOUNT

THE DISPLAY. BEFORE COMMENCING TO OPEN THE CASE YOU MUST ENSURE THAT

POWER HAS BEEN DISCONNECTED, AND MUST ENSURE THATPOWER CAN IN NO

CIRCUMSTANCES BE RE-APPLIED TO THE DEVICE WHILST THE CASE IS OPEN.

3.1 SIGNAL CABLES

The signal and data connectors are at the left hand end of the power and control card. They are connected

to extension cables, which are accessible from the rear of the display.

Do not earth the screen or braid of the input, data output or programmer cable outside the display, as it

is already internally earthed to the 'screen' terminal.

3.2 MAINS CABLES

The unit incorporates a switching power supply to enable the unit to operate over the full 95 to 265 Volts

range.

The mains lead must be of 3 core construction, with the earth wire bonded to a good earth.

Line (Brown) (+DC for DC option)

Neutral (Blue)(-DC for DC option)

No Connection

Earth (Green/Yellow)

1=Screen Braid

2=Common Blue

3=Input ARed

4=Input B Green

5=+Excitation Yellow

1=Screen Braid

2=Common Red

3=Select Green

4=Increment Blue

5=Menu Yellow

1=Screen Braid

2=Common Yellow

3=Data B Green

4=Data ABlue

Pulse Inputs

Remote Programmer

Optional Serial

Data O/P

1 2 3 4 5

1 2 3 4

Top Connector P1

Middle Connector P3

Bottom ConnectorP2

4.1 PULSE INPUT SELECTION

If, when ordering your display you specified the input type required, this will have been set for you prior to

despatch, and should be noted on the label on the rear of the display. If you did not specify the input type,

this will be the factory default of NPN/Contact closure . You can re-configure the meter, by making

internal jumper alterations, to accept PNP, 24VDC, TTL etc.

4.1.1 JUMPER FUNCTIONS AND POSITIONS

The internal circuitry is arranged as follows:-

Power

Brown = AC Hi

Blue = AC Lo

Gn/Yw = Ground

Remote Programmer Pulse Input

Red = Common

Yellow =Menu/Reset

Green = Select

Blue = Increment

Blue = A

Green = B

Yellow = Comm.

Serial O/P Option

Yellow = + Sig.Excitation

Red = Input A

Green = Input B

Blue = Common (-)

Fit to give Debounce I/P A

Fit to give Debounce I/P B

Pull-up

Pull-down

For no debounce, remove

appropriate jumper. Debounce

limits

input pulse rate to approx. 10Hz.

max

+ Excitation

2K2

100K

0.22uF 0.22uF

74HC14

Debounce jumpers

Pull up/down jumper

Comm.

I/P B

I/PA

74HC14 To processor

Pull-up

Pull-down

P1 Pulse inputs

P3 Programmer

P2 Serial output

option

Falling

Rising

I/P B

I/PA

Active Edge Selection

SIGNAL, DATA AND CONTACT CLOSURE CONNECTIONS

4.2 Typical Input Connections

The most common input sensor types are shown below, with a wiring guide, to assist you in the

installation of your totaliser. Only one input is shown, as they both have identical input circuitry.

Because the pullup resistors are not independent ( both inputs will be pulled up or down), you

should choose sensors which require the same pullup format, if using both inputs. In other

words, do not use a PNP sensor for one input and an NPN sensor for the other. You could ,

however, have a NPN sensor for one input and a contact closure for the other.

4.3 RS485 Data Output option (Factory installed only):

The Serial Data O/P cable allows you to feed the measured reading to serial input slave displays,

such as our S17XX series, or small 1/8 DIN SER-06 models, for remote indication purposes.

The output is continuous, with a new string transmitted at roughly 1 second intervals. The format is

the reading itself, including decimal point character, in ASCII, terminated by a Carriage Return.

The data format is 1 start bit, 8 data bits and 1 stop bit. The Baud rate is selectable, and is determined

by the fourth character of the Configuration Number. Extension cable should be screened, high

quality data cable, and should be routed away from sources of electrical noise such as motors,

power cables, inductive devices, discharge lighting circuits etc. Do not earth the screen of the data

cable, however, as it is already connected to internal earth on the display itself.

Up to 32 slaves having RS485 inputs can be driven from the output port.

NPN

To totaliser

I/P. ASignal

+ Excitation

Common

Sig.

Jumper Settings: Fit Debounce jumper if input rate is less than 10 per second

Fit Pull-up jumper

If display is to sense when item approaches sensor, fit falling edge jumper.

If display is to sense when item leaves sensor, fit rising edge jumper.

PNP

To totaliser

I/P. ASignal

+ Excitation

Common

Sig.

Jumper Settings: Fit Debounce jumper if input rate is less than 10 per second

Fit Pull-down jumper

If display is to sense when item approaches sensor, fit rising edge jumper.

If display is to sense when item leaves sensor, fit falling edge jumper.

To totaliser

I/P. ASignal

Common

Jumper Settings: Fit Debounce jumper. Input rate must not be greater than 10 closures per second

Fit Pull-up jumper

If display is to sense when contacts close, fit falling edge jumper.

If display is to sense when contacts open , fit rising edge jumper.

4.5 PROGRAMMINGYOUR DISPLAY

The Ratemeter offers useful flexibility in scaling and display presentation, and all parameters are adjusted

by using the three contact closure programming pushbuttons.

It is worth spending a little time familiarising yourself with the menu and the programming technique

before carrying out a full calibration. The menu structure is described below, and is followed by a

flow diagram to add clarity.

The flow diagram uses pictures of our Remote Programmer , consisting of three pushbuttons, arranged

as follows....

If you make up your own programmer, please

be sure to use good quality pushswitches, and

lay them out in the same order as shown here. MENU SELECT INCR.

Yellow = Menu

Green = Select

Blue = Increment

Red = Common

SELECT

INCREMENT

Allows you to enter the programming menu and step down all the variable options

when in programming mode.

Allows you to select a digit within a variable, for alteration. The digit which can be

altered flashes. Each time you press 'SELECT' the flashing digit moves one place to the

right.

Allows you to increase the value of any flashing digit. Each press will increase the

value by 1 .

4.6 The Programming Menu

As you enter the menu, prompts will appear on the display. Because they are formed with simple

7 segment displays, they do not appear to be familiar letter shapes, but are described in detail here.

SCALE This is the scale factor, which allows you to multiply or divide the input frequency (in Hz.)

by a constant. To divide, use a constant less than 1. The decimal point position in the scale factor

will determine the available display resolution, although the actual position of the decimal point in

display mode is set in the ZERO figure, below..

ZEroThis is the number of readings the display will use in its moving average calculations. If you

set it to 5, for example, the next displayed value will be the average of the last 5 displayed values.

How often the display updates is determined by the Configuration number (see below) , and you

can choose between 3, 10 or 30 seconds.

So, let us assume you select a zero value of 3, and an update time of 30 seconds, the display will

update every 30 seconds, and show the average rate over the preceding 90 seconds.

You can set the decimal point position on the display in the zero number, athough you should be

aware that the decimal point is not influential in the zero number itself. So, a zero number of 000.05

will give 2 decimal places on the display, and the display will average over the last 5 readings ! The

resolution in the span figure will need to match that of the decimal point position. So if you want to

read the power line frequency in Hz. to 2 decimal places, showing the average of the last 20 readings,

set Scale to 001.00 and zero to 000.20

CnFIg is the Configuration number. This determines the display update rate, sets output data baudrate,

and determines the brightness setting. See below for Configuration number makeup..........

88888

Data O/P Baud Rate

300 baud =4

1200 baud =5

2400 baud =6

9600 baud =7

Always set

to zero

BRIGHTNESS ADJUSTMENT:Using SELECT, move to the right hand digit of the CnFG number. Press

SELECT once more, and the whole display will flash. now, each time you press INCREMENT the brightness will

move to a new level. Press MENU when you have selected the desired brightness

Ratemeter Mode Set to 4 always

3 second update rate 5

10 Second update rate 6

30 second update rate 7

12345

Shows you have entered Setup

123456

SUrE? YES, SAVE NEW SETTING

NO, SKIP TO END & QUIT

INCREMENT

SELECT

Keep Pressing

INCREMENT,

and now also

press SELECT

PRESS MENU

R175X Menu Flow Diagram

1234567

X.X.X.X.X.

SELECT

INCREMENT

Scale Correct? N

Visible for 1 second

SCALE FACTOR

SCALE

12345

ZErO

12345

X.X.X.X.X.

SELECT

INCREMENT

Zero Correct? N

Visible for 1 second

NUMBER OF AVERAGE

SAMPLES & DISPLAYDECIMAL

POINT POSITION

12345

CnFig

12345

X.X.X.X.X.

SELECT

INCREMENT

Correct?

CONFIGURATION NUMBER

Configuration Number

SEtUp

Zero & Decimal-Point Figure

MENU(3 seconds)

Reverts

display

4.8 Application Example

Below is a commonly encountered application, with details of suggested configurations, to aid in

commissioning your ratemeter.

Please feel free to call our Application Engineering Department for assistance with your particular

application, if you so wish, and we shall be pleased to help you.

Athrough-beam system is often the most effective method of sensing objects as they pass along a

conveyor. The system relies on the containers breaking a light beam as they pass along the

conveyor, and is quite insensitive to reflections, and does not rely on the surface colour or tint of

the objects passing by.

The transmitter and receiver are powered by the totaliser's excitation supply, and the receiver

provides and NPN or PNP output signal.

To operate reliably, the items on the conveyor must always be separated, to allow the beam to pass

between them individually. If the items have transparent areas, such as bottles or jars, avoid

passing the beam through the transparent area, as this can give false signals due to refractive

effects.

Fit the debounce jumpers, if the throughput is less than 10 items a second, so that maximum

immunity to electrical noise is available .

Use I/P B Control to freeze the sampling action during periods of down-time, such as lunch

breaks etc, so that the display shows true working-time average rates of production. When

enabled, the display will indicate the actual rate during the enabled period.

Remember to use screened cables for all signal lines, to avoid picking up noise from electrical

machinery.

Counting rate of objects passing along a conveyor.....

Excitation +

Common

Input A or B

Receiver

Transmitter

5.0 INSTALLATION

If possible position the display away from heat and direct sunlight on the display face. The displays

should not be exposed to substances liable to damage uPVC, acrylic or glass.

If mounted outside, the display should be protected by a shroud to limit direct falls of rain, the

cooling effect of which can give rise to the display sucking in moisture.

DO NOT remove the cables supplied with the indicator, as these contain essential filter components.

You should extend cables with a junction box rather than remove and substitute cabling. Screening

must be used on your cables.

REMEMBER The signals you will be feeding to the displays are quite small in comparison to

some of the undesirable ‘noise’ generated by certain types of common electrical equipment. To

obtain the highest degree of accuracy and reliability from your indication equipment, we strongly

suggest that you....

DO use screened, twisted-pair cable to minimise the amount of noise being fed into the display.

DO NOT run signal cables adjacent to power/switching lines or near equipment liable to generate

large amounts of electrical noise, such as contactors, solenoids, fluorescent tubes, discharge lamps,

motor control equipment, etc. DO NOT earth the screens of signal , data or programmer cables, but

DO earth the screen on mains cables.

12345678901234567890123456789012123456789012345

Case sizes are subject to change, so we recommend you refer to our datasheet at

http://www.london-electronics.com/pdf/1700.pdf for latest details

5.2 PANEL MOUNTING

Seals IP65 from the front, IP54 from behind.

Mounts into a panel cutout.

5.3 WALL MOUNTING

A pair of swivel brackets, complete with fixing

screws to the case, but excluding fixing screws

to the wall.

5.4 SUSPENSION MOUNTING

A pair of swivel brackets, complete with fixing

screws to the case, but excluding fixing screws

to the support.

5.1 MOUNTING POSITIONS

For the standard-stock single line displays:

Case Material : uPVC, welded. Gasket Material: Neoprene Sealing screws: Stainless Steel

Case dimensions* Panel Cutout dimensions

Depth = 75mm + cables

Digit Height 5 digit mm (Kg) 7 digit mm (Kg) 5 digit mm 7 digit mm Sealing

57mm 291x142 (2.5) 387x142 (3.0) 293x144 389x144 IP65

102mm 483x179 (4.5) 674x179 (5.0) 485x181 676x179 IP65

144mm 642x181 (5.5) 883x181 (6.0) 644x183 883x183 IP65

200mm 824x237 (7.0) 1140x237 (8.0) 826x239 1142x239 IP65

280mm 1169x327(12.0) 1606x327(13.5) 1171x329 1608x329 IP65

400mm 1515x456(16.0) 2135x456(18.0) 1517x458 2137x458 IP65

* Panel mounting bezel (if requested) adds 18mm to width and height

Mounting methods : Wall, panel or suspension, mounting kit included in price, specify when ordering. Cowl extra.

Operating temperature : -10 to +50 degrees C

Storage temperature : -40 to +60 degrees C

Humidity : 57-144mm types 100% (IP65), 200-400mm types 0-95% non-condensing (IP54)

General specifications for the 1700 series

88888

12345678901234567890123456789012123456789012345

88888

6.0 TROUBLE SHOOTINGAND MAINTENANCE

The Large displays have been designed to provide a long trouble-free life and require no routine maintenance.

An annual calibration check is recommended.

The front lens may be cleaned with a proprietary window cleaner, and the case may be hosed down, and

cleaned with a cloth dampened with mild detergent. Surface scratching can be polished out with a mildly

abrasive cleaner such as perspex cleaner.

The mains power supply is for 95 to 264 volts AC, so there is no risk of applying 240 volts to a 110 volt

unit. Filtering is incorporated on the mains input, to prevent damage due to short spikes on the mains.

Damage will occur if the unit is subject to 415 volt mains application.

Check wiring prior to powering the units!

Technical helpline 01767 626444 Please make a note of full model number, serial number and

configuration number before calling us. Please also read the manual before calling, and , if you find

any part unclear, or do not find the information you need, let us know. That way we can improve future

editions of the manual for you.

7.0 SAFETY CONSIDERATIONS

The 1700 series is protected in accordance with IEC Safety Class 1. The instruments are designed and

tested in accordance with IEC publication 348, ‘Safety Requirements for Electronic measuring apparatus’,

and are supplied in a safe condition.

Whenever protection is likely to have been impaired by damage, the equipment shall be made

inoperative and be secured against any intended operation.

Removal of the rear cover WILL EXPOSE LIVE PARTS. The equipment must be disconnected

from the supply before carrying out any adjustments, replacement, or repair with the case opened.

If any work is carried out with the equipment opened and powered, it shall only be carried out by a

skilled person who is aware of the hazard involved.

Mains connections:

The unit is operable as soon as the mains is applied, there is no mains switch.

The equipment must be connected to a protective earth. Any interruption of the earth conductor

inside or outside the equipment is likely to make the equipment dangerous.

The mains and signal leads should not be allowed to collect within the instrument; all excess lead

must be pulled out through the cable glands.

Note that capacitors inside the instrument may still be charged when the equipment has been

disconnected from the supply. Before carrying out any work inside the equipment, a period of one minute

should be allowed for capacitors to discharge; to discharge the mains filter capacitors, short together the

live and neutral mains wires.

R F I

The equipment generates and uses radio frequency energy, but when properly installed as described,

complies with EN55022. The equipment is certified as meeting EN50081-1 and EN50082-1

Shielded cables MUST be used for all signal and data leads, but use of a shielded mains lead is not

required. The power earth wire must be bonded to a good earth, but DO NOT earth the signal, data or

remote programmer screens.

8.0 Warranty

London Electronics Ltd. warrants its products against defects in materials or workmanship for a period of

one year from the date of purchase.

In the event of a defect during the warranty period, the unit should be returned, freight( and all duties and

taxes ) prepaid by the Buyer to the authorised London Electronics Ltd. distributor from where the unit

was purchased. The Distributor, at its option, will repair or replace the defective unit. The unit will be

returned to the Buyer with freight charges prepaid by the distributor.

LIMITATION OF WARRANTY

The foregoing warranty shall not apply to defects resulting from:

1. Improper or inadequate maintenance by the

buyer.

2. Unauthorised modification or misuse.

3. Operation outside the environmental specification of the product.

4. Mishandling or abuse.

The warranty set forth above is exclusive and no other warranty, whether written or oral is expressed or

implied. London Electronics Ltd. specifically disclaims the implied warranties of merchantability and fitness

for a particular purpose.

EXCLUSIVE REMEDIES

The remedies provided herein are the buyer’s sole and exclusive remedies. In no event shall London

Electronics Ltd. be liable for direct, indirect, incidental or consequential damages (including loss of

profits) whether based on contract, tort or any other legal theory.

Other London Products

We also design and manufacture a broad range of panel meters, controllers, transmitters, and other

types of Large Displays.

1/8 DIN Panel meters

Inputs accepted include...

Pulses- Totalisers & Quadrature

Pulses - Ratemeters

4-20mA

0-10V

Thermocouples

RTD's

AC Volts and Current

Resistance

Slidewire postion tranducers

Loadcells

Torque transducers

RS232, RS485, RS422, 20mA TTY

BCD

We also produce Custom special instruments, designed for you from your requirement specifications

Large Displays

Other forms of large displays manufactured by London Electronics Ltd. include.....

Serial Input remote displays

Ratemeters

Proces Indicators

Weight Indicators

Draw Meters

Rate of Change indicators

Clocks

For a Full Catalogue and PriceList, please call us on 01767 626444, and we will despatch details

immediately.

9.0

9.0 AND FINALLY...

We really would appreciate receiving any comments you may wish to make after receiving your

LONDON ELECTRONICS LTD. Large displays.

In particular , if you experienced any difficulties during any stage of your purchase, your com-

ments will enable us to serve you better in the future.

Similarly, if there are any additional features you feel you would benefit from by having them

included in our range of equipment , please let us know and we will give your suggestions

serious consideration.

Please complete the section below and return it to us as soon as possible so that changes can be

made without delay.

Thank you for choosing products from LONDON ELECTRONICS LTD. !

NAME_____________________________JOB FUNCTION____________________________

COMPANY____________________________________________________________________

ADDRESS____________________________________________________________________

__________________________________________________________________________

POST CODE _______________________TEL. NO._________________________________

MODEL NUMBER_________________________SERIAL NUMBER____________________

BRIEF APPLICATION DESCRIPTION_____________________________________________

_____________________________________________________________________________

COMMENTS__________________________________________________________________

_____________________________________________________________________________

SIGNED______________________________ DATE__________________________________

NOTES

Declaration of Conformity

Conditions

The meters are permitted a worst case error of 1% of A/D range during electro-magnetic disturbance,

and must recover automatically when disturbance ceases without the need for human intervention,

such as resetting, power-down etc.

The meters covered by this certificate must be installed in adherence to the following conditions :-

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

This certificate applies only to meters carrying Serial Numbers 601001 or higher.

Signed as true and correct, for and on behalf of London Electronics Ltd.

J.R. Lees

Director

Declaration Number : EMC1700 Iss. 3

Issue Date : 21 April 1997

Products Covered : 1700 Series Large Displays

Title : Large Process, Serial

Rate & Totalising Displays

This is to confirm that the Products covered by this declaration have been designed and manufactured

to meet the following specifications :

EN55022:1987 Conducted Emissions: Class B

EN55022:1987 Radiated Emissions : Class B

IEC801-2:1984 Electro-Static Discharge Immunity: 8kV Air

IEC801-3:1984 Radiated ElectroMagnetic field Immunity: 3V/m

IEC801-4:1988 Fast Transient Immunity : AC 1kV, cable 0.5kV

Thus the products conform with the applicable sections of the following standards:

EN50081-1:1992 (normative)

EN50082-1:1992 (normative)

and comply with the requirements of Council Directive 89/336/EEC relating to Electro-Magnetic

Compatibility.

To confirm compliance, representative models within the range have been independently tested and

certified by MARCONI INSTRUMENTS EMC Department.

MARCONI CERTIFICATE # : TC96/029C

MARCONI CERTIFICATE Issue #: 1

MARCONI Certificate Issue Date : 14 February 1996

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