TM 11-6625-3081-23
2-17. OPERATOR INSTRUCTION MESSAGES (cont)
2-17
C. CONNECT SPOTMETER POWER CABLE P1 TO
RADI0METER TEST CABLE TE782073-J1.
D. CONNECT RADIOMETER CABLE TE782073-P1
TO TEST ADAPTER PANEL A2A4-J3 (14).
A. SET SPOTMETER ‘SHUTTER AND X1OO
ATTENUATOR’ KNOB (15) TO ‘CLOSE’.
B. SET SPOTMETER ‘ON/OFF/STANDBY’ SWITCH
(16) T0 ‘ON’.
A. SET SPOTMETER ‘FILTER SELECTOR’ KNOB
(17) T0 ‘ZERO].
B. SET SPOTMETER ‘SENSITIVITY
MULTIPLIER’ KNOB (18) TO 'ZERO AMP'.
C. SET SPOTMETER ‘FAST/SLOW’ SWITCH (19)
TO ‘FAST’.
D. ADJUST SPOTMETER 'AMP ZERO' KNOB
(20) UNTIL DISPLAY READS ‘0.00’
(+/- 0.05).
A. SET SPOTMETER ‘SENSITIVITY
MULTIPLIER’ KNOB (18) TO 'ZERO DK
CRNT'.
B. ADJUST SPOTMETER ‘DK CRNT ZERO’ KNOB
(21) UNTIL DISPLAY READS ‘0.00’
(+/- 0.10).
NOTE:
ADJUST KNOB SLOWLY - SPOTMETER
RESPONDS SLOWLY TO THIS ADJUSTMENT.
A.
SET SPOTMETER ‘FILTER SELECTOR’ KNOB
(17) TO ‘CAL’.
B. SET SPOTMETER ‘SENSITIVITY’ KNOB (18)
TO POSITION DEFINED FOR LUMINANCE FOR
THIS SPOTMETER. THE CALIBRATED
NUMBER FOR LUMINANCE CAN BE FOUND ON
THE TOP OF THE SPOTMETER LABELED
‘SENSITIVITY FACTORS’.
C. ADJUST SPOTMETER ‘SENS ADJUST’ KNOB
(22) UNTIL DISPLAY READS THE
CALIBRATED NUMBER FOR LUMINANCE
(+/- 0.05).
VERIFY STABILITY OF SPOTMETER BY
OBSERVING DISPLAY (APPROXIMATELY ONE
MINUTE) FOR VARIATIONS GREATER THAN
+/-. 0.05 OF INITIAL READING.
Change 9
2-142.33
