Ectron 441A, Instructions Manual, Page: 54 / 74

ALIGNMENT
Setup
Connect the Model 441A as shown in Figure 6-3 and
set S1 to On.
Screen Adjustment
From the
OPERATE
screen, press and hold the dis-
play/push button for one second to activate the
VIEW ANGLE
screen. Adjust the encoder counter-
clockwise and clockwise to verify the view angle is
adjustable in both directions. Turning it clockwise dark-
ens the screen and counterclockwise lightens it. When
finished, set the knob for the best viewing contrast.
Voltage Alignment
While still at
VIEW ANGLE
, press the display once
to go to
ADJUST − 10 V
. Adjust the encoder until
−
10.000 V
±
0.005 V is obtained on the DMM. The
three digits on this display (maximum range of
±
750
counts) are provided as a reference if needed. The least
count is
≈
1.3 mV. Record the DMM reading.
Press the display again to go to
ADJUST + 10 V
. Rotate
the encoder until the DMM reads
+
10.000 V
±
0.005 V.
The three digits on this display (maximum range of
±
750 counts) are provided as a reference if needed. The
least count is
≈
1.3 mV. Record the DMM reading.
Press the display again to the return to the
OPERATE
screen.
0RGHO
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2Q
Figure 6-3
Alignment
Alignment and Calibration Model 441A
6-4