|
| |
CAP (pF)
A-B
LOW TEST
OFF
TM 55-4920-383-13&P
DISPLAY SELECT (8)
RESISTANCE FUNCTION (11)
RESISTANCE RANGE (12)
POWER ON/OFF (20)
(2) Connect equipment as shown in figure 4-1.
(3) Set POWER ON/OFF switch (20) to ON.
Check that POWER ON indicator (19)
lights.
(4) Depress DISPLAY TEST pushbutton switch (4). Check that digital display (7)
reads 8.8.8.8.8.8.
b.
Capacitance LOW ADJ & HIGH ADJ Checkout.
(1) Remove CAPACITANCE-LOW ADJ control (2, figure 2-1) protective cap. Using a
screwdriver, adjust CAPACITANCE -LOW ADJ control (2) until digital display (7) reads LOW
values stamped on CAPACITANCE STANDARDS (5).
(2) Set CAPACITANCE RANGE switch (6) to HIGH ADJ position. Remove protective
cap from CAPACITANCE -HIGH ADH control (3).
(3) Adjust CAPACITANCE-HGIH ADH control (3) until digital display (7) reads HIGH
value stamped on CAPACITANCE STANDARDS placard (5).
(4) Set CAPACITANCE RANGE switch (6) to LOW ADJ position. Check that digital
display (7) reads LOW value stamped on CAPACITANCE STANDARDS placard (5).
NOTE
Repeat steps 2 through 4 until no further adjustment is required.
(5) Mount protective caps on CAPACITANCE HIGH ADJ (3) and LOW ADJ (2) controls.
c.
Capacitance Measurement Accuracy Checkout.
(1) Set CAPACITANCE RANGE switch (6) to 200 pF and adjust precision variable
capacitor No. 1 to 6.00 pF.
Check that digital display (7) reads between 5.50 and 6.50 pF.
4-2
|
