TM 11-4920-292-15
n. Rotate monitor to 0-degree heading.
CHECK control will cause a right-scale de-
flection on NULL INDICATOR,
HEADING and ERROR readout shall indicate
0 DEGREES 30 MINUTES.
k. Set E1 CHECK-E2 CHECK switch to E2
CHECK.
o. Set MODE SELECTOR control to CAL.
l. Adjust E2 VOLTS controls to null the
p. Rotate turntable until HEADING and
NULL INDICATOR meter.
ERROR readout indicates 0 DEGREES 10
m. Observe that a clockwise rotation of the
MINUTES,
E2 VOLTS controls vernier will cause a left-
q. Set azimuth scale of turntable to 0 degree.
scale deflection on NULL INDICATOR.
r. Set E1 CHECK, E2 CHECK, and AREA
n. Observe that a clockwise rotation of E2
COMP controls to 500.
CHECK control will cause a right-scale deflec-
s. Set E1 NORM-E1 REV switch to E1
tion on NULL INDICATOR.
NORM.
o. Set POWER ON-POWER OFF switch to
t. Set E2 NORM-E2 REV switch to E2
POWER OFF.
NORM.
∆270
u. Set READOUT SELECT control to 90.
Range Test
v. Set MODE SELECTOR control to MON.
w. Set E1 CHECK-E2 CHECK switch to E1
b. Set up and level monitor assembly and
CHECK.
turntable assembly on tripods at respective lo-
x. Adjust El VOLTS control until NULL
cations established during area magnetic sur-
INDICATOR indicates a null. Lock E1 VOLTS
vey.
control.
c. Mount magnetic azimuth reference detec-
tor on turntable assembly with telescope above
y. Set E1 CHECK-E2 CHECK switch to E2
turntable assembly plate.
CHECK.
d. Connect cable W3 between control console
z. Adjust E2 VOLTS control until NULL
connector 1J3 MONITOR and connector 3J1
INDICATOR indicates a null. Lock E2 VOLTS
of monitor assembly.
control.
e. Connect cable W2 between control console
Set E1 CHECK-E2 CHECK switch to
connector 1J2 TRANS and connector 4J1 of
aa.
turntable assembly,
ab. Set MODE SELECTOR control to CAL,
f. Set E1 CHECK-E2 CHECK switch to
ac. Set READOUT SELECT control to F.V.
OFF.
ad. Set MISAL polarity switch to +MISAL.
g. Set E1 NORM-E1 REV switch to OFF,
ae. Record readout ERROR.
h. Set E2 NORM-E2 REV switch to OFF.
af. Rotate MISAL MINUTES switch clock-
i. Set POWER ON-POWER OFF switch to
wise, step by step. Readout ERROR shall
POWER ON.
change in-a negative direction in increments of
j. Adjust VOLTS ADJUST control for 23.5
about 3 minutes for each position. At +120
volts on EXC VOLTS meter.
minutes, the error shall be 120 4 minutes more
k. Set READOUT SELECT control to F.V.
negative than error recorded in step ae, above.
ag. With MISAL MINUTES switch at 120,
l. Rotate monitor to sight target established
set MISAL polarity switch to - MISAL, The
during the area magnetic survey,
error shall be 120 4 minutes more positive
m. Set azimuth scale to previously deter-
than error recorded in step ae, above.
mined target bearing marked at monitor loca-
ah. Rotate MISAL MINUTES switch to 0.
tion.
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