TM-9-2350-311-10
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5
TECHNICAL MANUAL; OPERATOR’S MANUAL
NOVEMBER 1994
TM-9-2350-311-10 - Page 571 of 775
TM 9--2350--311--10
5--2
AUTHORIZED MUNITIONS — CONTINUED
5--2.3
Authorized Propelling Charges — Continued
k. Fuzes Artillery, Multi--Option (MOFA): M782
These fuzes are intended for use with fragmentation (HE loaded) and burster--type projectiles. They are automatically
remote set prior to launch via an inductive communication link. There are four functional modes on these fuzes: point
detonation (PD), delay (DLY), variable time (VT), and time (TIME). An electronic subassembly containing integrated
circuits provides control and logic for 199.9 seconds electronic timing, and transmits a fire pulse signal for time and
proximity functions. The mission data transferred from the M1155 Portable Inductive Artillery Fuze Setter (PIAFS) to
the fuze is confirmed by the setter and is displayed on a Liquid Crystal Display (LCD) module found on the setter. The
readout provided for the fuze setting is as follows:
Fuze Menu
£
M762
DM--52
M767
DM--74
M782
*MORE*
C32
*QUIT*
Fuze Setting Menu
FUZE:
M782
MODE:
VT
TIME:
187 sec
SET FUZE
Mode Menu
TIME
VT
DELAY
PD
Time Menu
100.0 sec
MULTI-- OPTION FUZE ARTILLERY (MOFA), M782
MOFA utilizes a standard M739 Safety and Arming (S&A) mechanism that is housed in a retaining cup just below the
detonator block. Both setback and spin locks are used to prevent accidental arming of the S&A prior to firing. This S&A
mechanism provides a safe separation distance of at least 400 calibers of projectile travel when fired.
These fuzes are set remotely by a weapon equipped with auto--set fire control system or by a Portable Inductive
Artillery Fuze Setter (PIAFS) M1155 (TM 9--1290--210--12&P). The setting can be changed as many times as
required.
This fuze is not sensitive to rain.
Change 6
5--40.3/(5--40.4 blank)
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