TB 9-6625-2057-24
8. Output Voltage
a. Performance Check
(1) Connect 600
output to multimeter using voltage divider.
(2) Set RANGE switch to X100 and frequency dial to 10.
(3) Adjust AMPLITUDE control fully cw.
(4) Multimeter will indicate at least 2.5 V ac.
b. Adjustments. No adjustments can be made.
9. Frequency Accuracy and Stability
a. Performance Check
(1) Connect 600
output to frequency counter using voltage divider.
(2) Position controls as listed in (a) through (d) below:
Frequency dial to 1.
(a)
AMPLITUDE control full cw.
(b)
NORMAL/LOW DIST switch (rear panel) to NORM.
(c)
Set RANGE switch to X5.
(d)
(3) If frequency counter does not indicate between 4.85 and 5.15 Hz, perform b below.
NOTE
On models that are battery operation only, disregard (4) and (5)
below.
(4) Vary autotransformer output between 105 and 125 V ac. Frequency counter
indication will remain between 4.85 and 5.15 Hz.
(5) Adjust autotransformer output to 115 V ac.
counter does not indicate within limits specified, perform b below.
Table 3. Frequency Dial Accuracy
Test instrument
Frequency counter indications
RANGE switch settings
Frequency dial settings
Min
Max
X5
6
29.1
Hz
30.9
Hz
X5
12
58.2
Hz
61.8
Hz
X10
1
9.7
Hz
10.3
Hz
X10
6
58.2
Hz
61.8
Hz
X10
12
116.4
Hz
123.6
Hz
X100
1
97
Hz
103
Hz
X100
6
582
Hz
618
Hz
X100
12
1164
Hz
1236
Hz
X1K
1
970
Hz
1030
Hz
X1K
6
5820
Hz
6180
Hz