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
