Page 420 - IRSEM_Main Book

(e) Extracting of/replenishment of tokens in Token instruments shall be done
when the instruments are in the "Line Closed" position.

(f) Token pouches shall be kept in proper repair by the Traffic Department and
damaged pouches shall not be allowed to be used.

Note: Also refer to para No. 18.9.1.

18.7.6 Responsibility of the Operating Staff

(a) Staff operating the instruments is responsible for the safe working of the
instruments, which is dependent on the correct use of the code of bell
signals and the correct operation of the instruments being carried out in
proper sequence.

(b) Importance of Bell Signals: The provision of telephones does not do
away with the necessity for use of authorised code of bell signals.

Section 8: Maintenance of Block Instruments & their Ancillary
Apparatus - General Instructions

18.8.1 (a) Technician shall ensure by a fortnightly check that

(b) Locks: Electrical or Mechanical Locks are in a condition that they are not
liable to be forced.

(c) Indicators: Indicators operate fully and return to the normal position
correctly when released.

(d) Contacts: All contacts are clean and free from pitting, if surfaces are pitted,
they shall be cleaned with chamois leather and refurbished.

(e) All springs are in good condition and kept properly adjusted.

(f) Relay Armatures: Relay armatures are free and return to their normal
position when no current is flowing.

(g) Track Circuits: Instructions as laid down in Chapter 17 of SEM shall be
adhered to.

(h) External Wiring: All wiring is in good condition and free from joints. Joints,
wherever necessary, are properly soldered and insulated.

(i) Terminal Screws: All terminal screws, lock nuts and locking screws are
kept tight and split pins opened.

(j) Batteries: All batteries are kept clean, terminals tight and free from dirt or
corrosion and maintained in accordance with instructions in Chapter 16 of
SEM.

(k) Lightning Protector: Lightning and power protective devices and earth
connections are effective and in good condition.

Chapter 18: Block Instruments, BPAC & IBS Working Page 368 of 535