STEDCOM TELECOMMUNICATIONS cc

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GENERAL

Case: Cast in Leaded Brass.

Handset: Hard Rubber with tough P.V.C. Cord.

Capsules: Both Dynamic.

TECHNICAL

Ring Voltage: 25-110 a.c. 16-60 Hz

D.C. Loop 25 – 75v

Loop length up to 1800 ohms

Dialling: Tone/Pulse (B/M 2:1 10 p.p.s.) Switchable.

T.P.B. 100ms

Last number redial

Keypad & Handset intrinsically safe (Protected by Triple Zener Barrier) I.A. Rated

Ringing – Mouthpiece in Handset

These telephones are suitable for use on exchanges built to British, German as well as South African standards, in compliance with the relevant requirements of SABS Standards.

SABS 314-1: 1994 "Flameproof Enclosures for Electrical Apparatus, Part 1: International requirements", SABS 60079-0:200 Electrical apparatus for explosive gas atmospheres Part 0: General requirements." and SABS IEC 60079-11:1999 "Electrical apparatus for gas atmospheres – Part 11: Intrinsic safety "i"’.
Locations

Gas
Underground and Surface
Hazard Frequency Intermittent as could occur under normal operating conditions in a hazardous area.
Environment Group I/IIA Methane to Hydrogen
Limiting Temperature T6