Model B Camera Tester

more times. The READY and FLASH indicator lamps should sequence as in step 3.

(6)On the flash simulator assembly, press and release the RESET button.

(7)Press the exposure button actuator. The number one READY indicator lamp should remain lighted and the number one FLASH indicator should not light. (Checks S9.)

NOTE : The toggle switches on the flash simulator assembly can be used to simulate normal or used flash lamps. By settinàg the individual switches, partially exhausted or deflective flash bars can be simulated.

d. Follow-Focus Test

The follow-focus test is used to determine how well the shutter blade opening follows the focusing of the lens in flash mode operation. The APERTURE meter is used in this test. It is calibrated in stops and when the test is performed, it will indicate stops deviation from the ideal design aperture. To perform the follow- focus test, proceed as follows :

(1)Set the camera focus to infinity and the L/D control to mid-range. Set the power supply to 5.8 volts.

(2)Remove the front cover from the camera and install the S7 switch actuator.

(3)Install the camera on the horn of the tester. The camera should go through its dark slide cycle.

(4)Remove the camera from the tester and set it on the collimator.

(5)Swing the 8’ and infinity lenses into their vertical positions on the collimator and look through the camera.

(6)Turn the focus wheel unti the vertical line in the center target is straight (refer to Figure 3-4). The camera is now collimated for the 8’ setting. Tape the focus wheel so it can’t be accidently moved.

(7)Remove the camera from the collimator and place it on the tester.

(8)Install the flash simulator plug into the socket on the camera and close the S2 CLOSE OPEN SWITCH

(9)Set the light level selector to 800 cdls/ft².

(10)Set the flash mode aperture switch to 8’.

(11)Block any light from the photocell on the

camera using a square of cardboard or other material.

(12)Depress the exposure button and observe the APERTURE meter.

(13)Record the 8’ APERTURE reading and compare it to the STANDARDS Chart.

(14)Remove the tape form the focus wheel and rotate the wheel to the 10.4’’ setting.

(15)Set the flash mode aperture switch to 10.4’’.

(16)With the photocell still blocked, press the exposure button and observe the APERTURE meter.

(17)Record the 10.4’’ APERTURE reading and compare it to the STANDARD Chart.

(18)If the reading is high at the 8 foot setting, and the needle goes off scale at the 10.4 ‘‘ setting, the interceptor mechanism is defective. (See Section IV for repair/adjustment.)

(19)If on scale readings are obtained for 8’ but the 10.4’’ reading is either high or low, the interceptor can be adjusted. The problem can be either the interceptor link or the interceptor cam. (See Section IV for repair/adjustment.)

(20)When repairs/adjustements, «interceptor on Wrong Side of Stop Pin».

a.Set-up

(1)Be certain that the comparalumen light source and electronics module are on a flat work surface and plugged into separate 110 VAC outlets.

(2)Plug the cable assembly from the horn into the socket located on the front of the electronics module.

NOTE : There is no warm up time required for the Model B Tester components.

b. Comparalumen Light Specifications

The following table shows the luminance levels of various setting used for camera testing.

c. Ambeint Exposure Measurements

(1)Remove the front cover from the camera.

(2)Close the S7 switch using the S7 actuator.

(3)Set the L/D control to the mid-range position using the trim reset cam and focus teh camera at infinity.