United Kingdom of Great Britain and Northern Ireland

Certificate of EC type-approval of a measuring instrument

Number: UK 2784 Revision 2issued by the Secretary of State for Business, Innovation & Skills

Notified Body Number 0126

In accordance with the requirements of the Non-automatic Weighing Instruments Regulations 2000 (SI 2000/3236) which implement, in the United Kingdom, Council Directive 2009/23/EC, this certificate of EC type-approval has been issued to:

Central Weighing LtdUnit 142Hartlebury Trading EstateKidderminsterWorcestershire, DY10 4JBUnited Kingdom

in respect of a class IIII non-automatic weighing instrument designated the Checklode DP Portable Vehicle Weighing System.

Wheel load Axle loadMax: 15000 kg 30000 kgMin: 500 kg 1000 kg

e = 50 kg 100 kg

The necessary data (principal characteristics, alterations, securing, functioning etc) for identification purposes and conditions (when applicable) are set out in the descriptive annexto this certificate.

This revision replaces earlier versions of the certificate.

Signatory: P R Dixonfor Chief Executive

National Weights & Measures Laboratory(Part of the National Measurement Office)Department for Business, Innovation, & SkillsStanton Avenue

Date: 08 September 2010 TeddingtonValid Until: 06 April 2016 TW11 0JZReference No: T1128/0251 United Kingdom

(UK 2784) V(0)a

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Descriptive Annex1 NAME AND TYPE OF INSTRUMENT

This pattern, designated the Cheklode DP Portable Vehicle Weighing System can be configured as a cable or RF version. It comprises three main elements, depending upon the configuration:

Cable version

Cheklode DP indicator unit with an integral printer (Figure 1) DP-L left weigh-pad DP-R right weigh-pad

RF version

Cheklode Freeweigh indicator unit with an integral printer (Figure 2) DP-L left weigh-pad DP-R right weigh-pad

NOTE: The use of individual wheel and/or axle loads for some Article 1.2(a) applications under EC Directive 2009/23/EC may be prohibited in some Member States.

2 DESCRIPTION

2.1 General information

2.1.1 Hardware

2.1.1.1 The individual weigh-pads (Figures 3 and 4) are laid side by side on a suitably prepared and level paved road surface. Surface ramps can be used, or a shallow slot can be cut into the road surface.

2.1.1.2 Cable version

The two weigh-pads are connected via an interconnection lead; the indicator is then connected via a second cable to the nearest weigh-pad. The two weigh-pads function individually and connect to independent A/D channels within the instrument allowing both wheel & axle weights to be calculated.

2.1.1.3 RF version

Each individual weigh-pad has its own combined A/D circuit with Bluetooth communications. The RF-L & RF-R pads are configured to transmit data directly to the Cheklode Freeweigh console on separate channels configured by the Bluetooth modules. Each weigh-pad sends a data string comprising Synchronisation, data and a status.

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2.1.1.4 The remote indicator, which may be located up to 30 metres away, receives data by cable or Bluetooth communications. The received data is encoded and checked for errors. The data is stored if it has been received error free. If an error is received it is flagged as a signal loss and the data packet is ignored.

2.1.2 Indicator

2.1.2.1 Cable version

The indicator is mounted in a carrying case and comprises an LCD display, LCD panel, keypad, thermal printer, motherboard, twin A/D boards model “E811A, rechargeable battery and power supply (battery charger). Figure 5 shows the layout of the instrumentation panel.

2.1.2.2 RF version

The indicator is mounted in a carrying case and comprises an LCD display, LCD panel, keypad, thermal printer, motherboard, dual-channel Bluetooth module type “E880A” (communications method configurable), rechargeable battery and power supply (battery charger).

2.1.3 Software

2.1.3.1 The individual left and right weigh-pad loads are displayed on a secondary display window on the indicator. The sum of the two weigh-pads (axle load) is shown on the primary weight display window of the indicator.

2.1.3.2 Unauthorised access to the various configuration menus is protected by passwords which are entered via the keyboard.

NOTE: The software contains configurable options for weighing in other modes of operation which do not form part of this approval.

2.1.4 Calibration

2.1.4.1 The calibration process involves loading each weigh-pad up to its maximum capacity in steps of 500 kg or 1000 kg. At each step the calibration factor is calculated by the readout and stored in non-volatile memory.

2.1.4.2 Alternatively, each weigh-pad can be calibrated at a single point, e.g. 8000 kg, rather than the steps described above.

2.1.5 Operation

2.1.5.1 Wheel and axle loads are recorded and/or printed by pressing the store or print button respectively.

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3 TECHNICAL DATA

3.1 Technical characteristics

weigh-pads are powered by 8 x 1.2 V DC rechargeable Ni-Cad batteries; indicator is powered by a rechargeable 12 V DC lead acid battery; external transformer/battery charger requires an input voltage of 95-265 V

AC, or a DC voltage of 12 V; signal transmission from weigh-pad to indicator is by cable or Bluetooth; weigh-pad to weigh-pad communication is by cable (cable version only); operating temperature range is -10 º C to + 40 º C.

3.2 Devices

3.2.1 The instrument is provided with the following devices:

display check during power-up; determination of stability of equilibrium; calibration / set-up access via keyboard with audit trail number; linearity calibration; initial zero-setting; semi-automatic zero-setting; zero-tracking.

3.3 Weigh-pads

3.3.1 The weigh-pads are of type DP, each having a maximum capacity of 15 t. The weigh-pads will bear either the same serial number as the indicator or be sealed to the indicator.

3.3.2 Weigh-pad drawings

Weigh-pad Drawing No. Issue NoDP / DP RF C 03389 3

4 PERIPHERAL DEVICES AND INTERFACES

4.1 Interfaces

4.1.1 The Cheklode DP is provided with the following interfaces which are located on the instrumentation panel:

Mains connector (95 – 265 V AC) for charging of the indicator battery 12 V DC connector 1 x weighpad connector (cable version only) RS232 / USB

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4.2 Peripherals

4.2.1 The following peripheral devices may be connected to the RS232 interface:

(i) Peripheral devices that have been issued with a test certificate by a Notified Body responsible for type approval under Directive 2009/23/EC; or

(ii) Peripheral devices without a test certificate under the following conditions:

it bears the CE marking for conformity to the EMC Directive;

it is not capable of transmitting any data or instruction into the weighing instrument, other than to release a printout, checking for correct data transmission or validation;

it prints weighing results and other data as received from the weighing instrument without any modification or further processing;

it complies with the applicable requirements of EN45501, i.e. 4.2, 4.4, 4.6 and 4.7.

A printing device may print additional information such as date or number to identify the printed weighing result(s) or sets of weighing results.

5 APPROVAL CONDITIONS

5.1 Legends

5.1.1 The instrument bears the following legends near to the electro-mechanical and LCD displays:

Wheel load Axle loadMax: 15000 kg 30000 kgMin: 500 kg 1000 kg

e = 50 kg 100 kg

5.1.2 The rating plate is mounted in the left-hand corner of the instrumentation panel, and bears the following markings:

Manufacturer’s name Class IIII Max Min e = Certificate No. Serial No.

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6 SEALING AND VERIFICATION MARKINGS

6.1 The instrument calibration/configuration is protected by means of passwords. When the instrument is re-calibrated and/or re-configured a non-erasable audit trail number is generated. The current value of the audit trail number can be displayed on the LCD panel. The number is recorded on a tamper-evident label on the rating plate.

6.2 The rating plate is secured against removal by sealing or by being destroyed when removed.

6.3 Components that may not be dismantled or adjusted by the user must be secured by a suitable manufacturer's mark such that the seal is broken if opened.

6.4 The green "M" metrological marking and the EC verification mark are located in the left-hand corner of the instrumentation panel.

7 LOCATION OF CE MARK

7.1 The CE mark is located in the left-hand corner of the instrumentation panel.

8 AUTHORISED ALTERNATIVES

8.1 Having the Cheklode Freeweigh indicator with a new PCB for the display/keyboard and a remodelled housing (Figure 6), in which case the instrument is designated the Cheklode Freeweigh indicator V2.

9 ILLUSTRATIONS

Figure 1 Cheklode DP indicatorFigure 2 Cheklode Freeweigh indicatorFigure 3 Cheklode DP cabled indicator and cabled padsFigure 4 Bluetooth weighpad Figure 5 Instrumentation panelFigure 6 Cheklode Freeweigh indicator V2

CERTIFICATE HISTORY

ISSUE NO. DATE DESCRIPTIONUK 2784 07 April 2006 Type approval first issuedUK 2784 Revision 1 03 August 2007 Amendments to include Bluetooth

configuration.UK 2784 Revision 2 08 September 2010 Addition of Section 8.1

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Figure 1 Cheklode DP indicator Figure 2 Cheklode Freeweigh indicator

Figure 3 Cable weigh-pads Figure 4 Bluetooth weigh-pad

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Figure 5 Instrumentation panel

Figure 6 Cheklode Freeweigh indicator V2

Crown Copyright 2010NATIONAL WEIGHTS AND MEASURES LABORATORY(Part of National Measurement Office)Department for Business, Innovation & Skills

PRINTER

Charging LED Indicator

Power On

USB Port

Mains ConnectorIncluding Fuse

DC Input Fuse

12V DC Connector

Weighpad Connector

MAIN WEIGHT DISPLAY

DATA ENTRY DISPLAY

KEYBOARD

CHEKLODE DP PORTABLE AXLE WEIGHING SYSTEM

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