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  TB 11-6625-821-35
Figure 4. Test equipment connections for frequency measurement of Static Power Inverter
CV-2128/ARN-83 output.
(c) Frequency meter should indicate 400 ±40 cps. If not, perform b(2) below.
Readjust R8 and R1 as necessary for best possible compromise of 26 volts ac and 400 Hz, as
these adjustments sometimes interact.
(d) Set D.C. POWER switch on the unit under test to OFF.
b. Adjustments
(1) Voltage adjustments.
(a) Set D.C. POWER switch on the unit under test to OFF.
(b) Loosen the screws holding the front panel to the unit under test. Remove
the front panel.
(c) Connect the equipment as shown in figure 2.
(d) Set D.C. POWER switch on the unit under test to ON.
(e) Turn the function switch to ADF.
(f) Adjust potentiometer R8 (see fig 5 for location) in the unit under test until
multimeter indicates 26 volts ac. (R)
(g) Set D.C. POWER switch to OFF. (R)
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