EEC type-examination certificate UK 2185 Revision 3

UK 2185

VII(1)

Issue Date: Valid Until: Reference No:

01 April 2014 12 January 2022 TS14/0005

Signatory:

for P R Dixon Chief Executive

National Measurement Office | Stanton Avenue | Teddington | TW11 0JZ | United Kingdom Tel +44 (0)20 8943 7272 | Fax +44 (0)20 8943 7270 | Web www.bis.gov.uk/nmo NMO is an Executive Agency of the Department for Business Innovation & Skills

EEC type-examination certificate UK 2185 Revision 3 issued by

The National Measurement Office

In accordance with the provisions of regulation 8(5) of the Measuring Instruments (EEC Requirements) Regulations 1988 (SI 1988 No 186) which implement in the United Kingdom the Council Directives 71/316/EEC as amended and 86/217/EEC relating to tyre pressure gauges for motor vehicles, this certificate of EEC type-examination has been issued to:

Pneumatic Components Limited Holbrook Rise Holbrook Industrial Estate Sheffield S20 3GE United Kingdom

in respect of: A tyre pressure gauge for motor vehicles model: WALLAIR 60 GAUGE maximum operating pressure: 10 bar

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

This revision replaces previous versions of the certificate.

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Descriptive Annex

1 REGULATIONS

The measuring instrument in respect of which this certificate of EEC type examination has been issued is subject to the provisions and requirements of the requirements of the Measuring Instruments (EEC Requirements) Regulations 1988 (SI 1988 No 186) as amended which implement in the United Kingdom the Council Directive No 73/362/EEC as amended by Directives 78/629/EEC and 85/146/EEC.

2 DESCRIPTION OF THE PATTERN

This pattern of a wall-mounted motor vehicle road tyre pressure gauge, as shown in Figure 1, comprises a gauge and pneumatic hose assembly with a tyre inflation/deflation control unit. The system allows:

(i) measurement of road tyre pressure (ii) inflation of tyre pressure (iii) deflation of tyre pressure.

The maximum pressure capable of being measured is 10 bar (gauge)

3 CONSTRUCTION

3.1 Mechanical

The gauge, as shown in Figure 2, consists of a phosphor bronze bourdon tube (1) soldered at one end to the gauge chassis (2) which is bolted to the rear of the faceplate (3) with three bolts (4). The free end of the tube has soldered fitting (5) providing a pivoted mount for adjustable connecting link (6) to the quadrant rack (7) interfacing with pinion (8). Two mounting plates (9) and (10) locate the quadrant rack pivot spindle and pinion spindle, held apart by two cylindrical tube spacers through which two screws (11) hold the assembly together. A laminated plastic gasket is compressed between mount plate (9) and the chassis which are bolted together with two bolts (12). Mounted on the tapered pinion spindle is hair spring (13) being also located on the adjacent cylindrical spacer, the spindle protrudes through the chassis and faceplate and locates a black coloured knife-edged pointer (14). Bolt (15) and nut (16) provide an under range stop.

The general assembly is shown in Figure 3. The metal casing (1) houses the gauge which is retained in position by four bolts, also securing plastic cover (2). The translucent window (3) through which the gauge is viewed is held in position by metal clip (4) and two metal clamps (5) being secured by two bolts (6) which also locates the gauge and plastic cover. Pneumatic input to the bourdon tube is through a 2 mm nylon tube (7) having a threaded compression fitting at either end, being assembled to both the gauge chassis and the air supply/gauge line fitting (8) being bolted to the casing with three bolts (9). Fitting (8) also carries the external air supply connection (10) capable of swivelling to accept the supply hose. The metal casing is closed with a metal lid (11) being bolted in position with three bolts and having a fitting (12) for a light bulb operating on mains voltage.

The pneumatic hose assembly consists of a parallel threaded connector (13) having a locating peg with orifice for the gauge line and plain orifice for air supply, this connector is coupled with fitting (8) also assembled with a male parallel thread to the main concentric reinforced nylon hose (14). This hose has both ends terminated with a crimped fitting having a swivel, female parallel thread connector, being also assembled to the inflation/deflation control unit (15). Routed along the bore of the hose is a 2 mm nylon hose (16) having threaded compression fittings at either end by which it is assembled to the connector (13) and the inflation/deflation control. Pneumatic hose (17) having crimped, male threaded end fittings is assembled to the inflation/deflation control and tyre valve connector (18) having

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two in line hold-on ports (19) in which a non-metallic seal is located in each and a free moving valve (20).

3.2 Display

The gauge faceplate (Figure 4) indicates a pressure range of 0 to 10 bar, each one tenth of a bar is shown by a red graduation line with every fifth line being of greater length. Each bar, including the zero, is permanently marked in red. Extending over the pressure range of 1.4 bar to 4.5 bar is a yellow coloured overlay.

The gauge faceplate also carries an additional pressure range scale, 0 to 140 lbf/in², marked in black and arranged on a lesser radius than the bar scale.

3.3 Technical data

pressure range: 0 to 10 bar scale graduations 0.1 bar faceplate (mounted) 210 mm diameter (nominal) pointer radius 77 mm (nominal) bar scale radius 74 mm (nominal) bar scale arc 270@ (nominal) bourdon tube 115 mm diameter (nominal) operating temperature range - 10 °C to + 40 °C overall length of pneumatic hose 9.5 metres (minimum) (including inflation/deflation control)

3.4 Sealing and stamping

In Figure 3, the two bolts (6) securing metal clamps (5) also locate and retain metal cups, which are undercut, in which lead seals are fixed for stamping. These bolts have threaded fasteners securing the plastic cover (2) to the casing (1). Removal of the cover shall necessitate withdrawing both bolts.

4 OPERATION

The pneumatic circuit is shown in Figure 5. To obtain the vehicle tyre pressure the tyre connector is pushed onto the tyre valve, the connector valve (20) (Figure 3) then depresses the tyre valve so enabling the pressure to be communicated to the bourdon tube by way of the gauge line (Figure 5).

To increase the vehicle tyre pressure, the inflation lever (Figure 5) is depressed, unseating the inflation valve (1) and allowing air to be supplied to the tyre. Allowing the inflation lever to return to its rest position restores the gauge line enabling tyre pressure to be indicated on the gauge.

To decrease tyre pressure, the deflation button is depressed, unseating deflation valve (2) and allowing air from the tyre to vent to atmosphere through the deflation button housing. Allowing the deflation button to return its rest position restores the gauge line permitting tyre pressure to be indicated on the gauge.

The gauge operates using a bourdon tube mechanism. Vehicle tyre pressure is indicated on the gauge by air entering the elliptical shaped bore of the bourdon tube (1) (Figure 2) exerting a pressure on the free end of the tube causing it to move radially. This movement is transmitted by the adjustable connecting link (6) to the quadrant rack (7) which rotates about its pivot and drives the pinion (8). The rotating movement of the pinion is transmitted by its spindle to the knife-edged pointer (14). The hair spring (13) acts on the pinion to eliminate any lost motion between it and the quadrant rack and the laminated gasket reduces mechanical shock to the mechanism.

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5 INSCRIPTIONS

5.1 The following inscriptions are marked on the faceplate:

(i) PCL AIR TECHNOLOGY (ii) ONLY bar SCALED APPROVED (iii) Pe

(iv) 100°

(v) THE SIGN OF EEC PATTERN APPROVAL (vi) IMPORTANT

TO REGISTER TYRE PRESSURE RELEASE INFLATOR LEVER

5.2 The unit of denomination "bar" is marked adjacent to the red coloured numeral “10”. An adhesive label affixed to the air receiver identifies the instrument as a "WALLAIR 60 GAUGE".

5.3 The face of the inflation lever is stamped with:

�

-

+

6 AUTHORISED ALTERNATIVES

6.1 Having the inflation/deflation control unit with a single hold-on tyre valve connector, as shown in Figure 6a.

6.2 Having the inflation/deflation control unit with a single clip-on tyre valve connector, as shown in Figure 6b.

6.3 Having the inflation/deflation control unit with a twin clip-on tyre valve connector, as shown in Figure 6c.

6.4 Having separate hoses, of 6 mm bore twisted together for the supply of air and return line to gauge, as shown in Figure 6d.

6.5 Having alternative PCL brand logos for the dial face and any affixed labels, as shown in Figure 7.

6.6 Having the modification of a simplified bourdon tube mounting system. The external appearance remains unchanged except that three mounting screws are now visible below the pointer in the faceplate. The mounting system is shown in Figure 8.

6.7 Having an alternative case to house the bourdon tube assembly, as shown in Figure 9. The case is sealed by having one of the lid retaining screws at the rear of the case fitted with a metal cup into which a lead slug is fixed for stamping.

6.8 Having the modification of inflate and deflate buttons mounted on the front face of the case, as shown in Figure 10. The model designation for this modification is Wall Meter 3 (WM3), alternatively the case may be mounted on a pedestal having the model designation, Post Meter 3 (PM3).

6.9 Having alternative New Corporate Logo(s) for the dial face and any affixed labels, as shown in Figure 11.

6.10 Having an alternative case to house the bourdon tube assembly, as shown in Figure 9a. The case is sealed by having one of the lid retaining screws at the rear of the case fitted with a metal cup into which a lead slug is fixed for stamping.

6.11 Having an alternative mount, shown in Figure 12, for the alternative case described in section 6.10.

6.12 Having alternative instructions on front panel, in pictorial form (Figure 13).

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6.13 Having alternative language instructions mounted on right hand side panel of housing.

6.14 The gauge housings may be different colours from the examples shown in this certificate.

6.15 Having an alternative dial face with a brushed aluminium or white background with black scale markings and technical data as shown in Figure 9a.

6.16 Having an alternative dial design showing a “bar” measurement unit scale only, as shown in Figure 14.

7 ILLUST RATIONS

Figure 1 The pattern Figure 2 The gauge Figure 3 General assembly of pattern Figure 4 Displays and legends Figure 5 Pneumatic circuit Figure 6 Alternative inflation/deflation control units, and separate hoses Figure 7 Alternative, black & white and colour, PCL brand logos Figure 8 Simplified bourdon tube mounting system Figure 9 Alternative case and sealing arrangement Figure 9a Alternative case Figure 10 Alternative case with inflate and deflate buttons Figure 11 Examples of New Corporate Logo(s) Figure 12 Alternative mount. Figure 13 Alternative pictorial instructions. Figure 14 Alternative dial design - “bar” unit scale only

8 CERTIFICATE HISTORY

ISSUE NO. DATE DESCRIPTION

2185 19 February 1992 Type examination certificate first issued.

2185 18 February 2002 Type examination certificate first renewed.

2185 Amd 1 31 October 2007 Alternative PCL brand logos

2185/1 12 April 2002 Simplified bourdon tube mounting system

2185/2 18 February 2003 Alternative case and sealing arrangement

2185/3 16 July 2004 Alternative case with inflate and deflate buttons

2185 Revision 1 13 January 2012 Consolidation of Certificates:2185, 2185 Amd 1, 2185/1, 2185/2 & 2185/3.

Certificate renewed for further 10 years

2185 Revision 2 04 October 2012 Addition of section 6.9, and Figure 11, for New Corporate Logo(s)

2185 Revision 3 01 April 2014 Addition of sections 6.10 to 6.16 and figures 9a, 12, 13 and 14.

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Figure 1 The pattern

Figure 2 The gauge

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Figure 3 General assembly of pattern

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Figure 4 Displays and legends

Figure 5 Pneumatic circuit

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Figure 6 Alternative inflation/deflation control units, and separate hoses

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Figure 7 Alternative, black & white and colour, PCL brand logos

Figure 8 Simplified bourdon tube mounting system

Figure 9 Alternative case and sealing arrangement

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Figure 9a Alternative case

Figure 10 Alternative case with inflate and deflate buttons

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Figure 11 Examples of New Corporate Logo(s)

Figure 12 Alternative mount.

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Figure 13 Alternative pictorial instructions.

Figure 14 Alternative dial design - “bar” unit scale only.

© Crown Copyright 2014

NATIONAL MEASUREMENT OFFICE

Department for Business, Innovation & Skills