Siemens Sitrans instruction manual SITRANS LC 500 Installation, Handling Electrodes

Installation

SITRANS LC 500: Installation

Notes:

•Installation shall only be performed by qualified personnel and in accordance with local governing regulations.

•This product is susceptible to electrostatic discharge. Follow proper grounding procedures.

WARNINGS:

•Disconnect the device before any welding is carried out in the vicinity of the instrument.

•Provide protection when the solid-state switch is activating an external relay to prevent possible switch/relay damage resulting from inductive spikes generated by the relay coil. (See Protection for solid- state switch on page 21 for details.)

Handling Electrodes

WARNINGS:

•Do not scratch or gouge the PFA electrode insulation since this could reduce the integrity of the insulation and the useful life of the electrode.

•Be careful with an enamel-insulated electrode1.

•Do not damage the insulation jacket on the electrode during shipping, packing, and installation2. Any damage to the electrode can prevent proper performance.

•(ATEX 100): Precautions MUST be taken to avoid ignition due to hazardous electrostatic discharges:

a.Where an isolated probe is used in gas, vapor, or a non- conductive liquid that is potentially explosive, requiring apparatus group IIC equipment.

b.Where the probe is used in a potentially explosive dusty atmosphere.

1.Normally the enamel insulation is protected by a stilling well, which is part of the design.

2.Most electrodes use PFA insulation, a very dense and reliable type of Teflon® that prevents leakage and corrosion of the metal electrode and acts as an insulator when conductive materials are being measured.

Page 20 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01