560550-0078 Issue D Page 1 of 7

GEMS SENSORS & CONTROLS

OPERATING & INSTALLATION INSTRUCTIONS

CE MARKED SERIES 6700B

PLEASE READ CAREFULLY BEFORE INSTALLING

PART NUMBER: 560550-0078 ISSUE: D

Please Note: The Series 6700B is designed and manufactured in accordance with sound

engineering practice as required by the Pressure Equipment Directive 2014/68/EU. This product

must not be used as a “safety accessory” as defined by the Pressure Equipment Directive, Article

1, Point 4. The CE Mark on the unit does not relate to the Pressure Equipment Directive.

INTRODUCTION

Series 6700B are fluid pressure measuring transmitters in which a four active arm Wheatstone

bridge of thin film CVD gauges, integral with a beam structure connected to a pressure summing

diaphragm, is used to convert fluid pressures into a proportional electrical signal.

Common integral electronics converts the input from the gauge to a 4-20mA 2-wire output signal.

Series 6700B conform with the essential protection requirements of the EMC Directive

2004/108/EC amended by certified type testing to EN 61326-1 and EN 61326-2-3.

Conformity with the requirements of the CE mark only applies when the installation

conditions described in these instructions have been met. For units supplied without a

cable assembly connection to the transmitter must be accomplished using Gems Sensors

approved cable. see APPROVED CABLE section.

All instruments conform to the appropriate specifications and/or drawings applicable and have

been subjected to relevant strict quality control procedures.

HAZARDOUS PRODUCTS

The Consumer Protection Act of 1987, Section 6 of the Health and Safety at Work Act 1974 and

the Control of Substances Hazardous to Health Regulations 1988 require that we advise

recipients and users of our products of any potential hazards associated with their storage,

handling or use.

The products which our Company supplies may be classified as Electrical, Electro-Mechanical

and Electronic equipment.

These products are tested and supplied in accordance with our published specifications or

individual special requirements that are agreed in writing at time of order. They are constructed

so as not to affect adversely the safety of persons and property when properly installed,

maintained and used by qualified personnel, in the applications for which they were designed and

manufactured

560550-0078 Issue D Page 2 of 7

ACTION ON RECEIPT

* Check details on Calibration Certificate agree with data etched on transmitter body.

* Check accessories supplied include:

Calibration Certificate (or QA Certificate)

Seal, Dowty Bonded

Mating Connector (where applicable)

GENERAL

* Transmitter should not be subjected to greater than the maximum allowable pressure as

defined on the transmitter label.

* Transmitter should not be subjected to mechanical impact.

* In the event of fire the end user must ensure that the system pressure is vented to a safe

area.

* The effects of decomposition of unstable fluids should be considered by the user when

placing this device in service.

* The pressure transmitter has no means of draining or venting, this must be performed by

another component in the end users system.

* Pressure range must be compatible with the maximum pressure being measured.

* Pressure media must be compatible with the transmitter wetted parts which are 17-4 PH

stainless steels and Nickel Braze to BS 1845 : NK3/HTN2

* Exposed end of cable must be kept free from moisture.

* Liquid must not be allowed to freeze in the pressure port.

Full specifications for all products available on request from our Service Department.

MECHANICAL INSTALLATION

Pressure Connections: G¼ internal pressure connection to BS2779 as standard. Alternative

fitted as specified at time of order.

Pressure couplings screwed into G¼ pressure ports should have a maximum thread engagement

13 mm and UNDER NO CIRCUMSTANCES be allowed to touch the pressure sensitive

diaphragm. Pressure couplings should be sealed against the outer face at the pressure port entry

using bonded seal washer such as:-

Part Number Description

234646-0002 G¼ bonded seal up to +100°C operation.

Dowty Ref: 400-021-4490-02

Refer to Dowty for external pressure ratings.