TB 9-6625-2057-35
CAUTION
On models with rechargeable batteries, do not apply 115 V ac if
batteries are removed; otherwise, damage will result.
NOTE
On models that are battery operation only, disregard b and c
below.
b. Connect TI to autotransformer.
c.
Connect autotransformer, to a
115 V ac
source and
adjust for 115 V
output.
d. Position controls as listed in (1) through (3) below:
(1) FREQ dial to 5.
(2) FREQ VERNIER control to center position.
(3) RANGE switch to X1.
e. Wait 20 minutes for equipment to warm-up and stabilize.
15. Frequency Accuracy and Stability
a. Performance Check
(1) Connect OUTPUT 600 Ω to frequency counter using voltage divider.
(2) Adjust AMPLITUDE control fully cw. 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 (3) and (4)
below.
indication will remain between 4.85 and 5.15 Hz.
(4) Adjust autotransformer output to 115 V ac.
(5) Set RANGE switch and FREQ dial for settings listed in table 6. If frequency
counter does not indicate within limits specified, perform b below.