Ectron 441A, Instructions Manual, Page: 23 / 74

digit is set. Continue until all the digits are set. Remem-
ber that the two frequencies can never be closer to each
other than 10 Hz.
VOLTAGE-SET SCREEN
Function
To set the upper- and lower-voltage set points.
From the OPERATE screen
Press the display twice.
To the OPERATE screen
Press the display six times or wait approximately twenty
seconds.
Defaults +10.0
V and
+00.0
V.
Discussion
The upper-voltage set point can be any voltage from
−
9.9 V to
+
10.0 V while the lower-voltage set point
can be any voltage from
−
10 V to
+
9.9 V.
Operation
There are four possible characters to set on this screen.
When the screen is first displayed, the blinking cursor
is on the 1’s digit of the upper-voltage set point. Press
(and release) the encoder until the cursor is at the digit
to be changed. Then, rotate the encoder until that digit
is set. Continue until all the digits are set. Remember
that the two voltages cannot be closer to each other
than 0.1 V.
INPUT-SIGNAL SCREENS
There are three screens to filter and condition the input signal to enhance the performance
of the Model 441A. The first,
PULSES/REV
olution, eliminates input-signal error due to
periodic, repetitive variations or errors. The next two screens,
INPUT SENS
itivity and
INPUT B/W
, work in conjunction with each other to provide the user nine combinations
of input conditioning for the input signal. See the Applications section for further discussion.
Pulses/Revolution Screen
Function
To set the number of pulses of the input signal that
occur during one revolution (or cycle).
From the OPERATE screen
Press the display three times.
Figure 3-5
Voltage Set
Upper-voltage set point of
+3.4 V and a lower-voltage
set point − 1.7 V
Model 441A Operation
3-7