Click here to make tpub.com your Home Page

Page Title: Operating Procedure.
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home


   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 

TM 55-4920-325-14&P
d. Set Power ON/OFF switch (2, figure 2-1)
i . Set Capacitance RANGE SELECTOR
to ON and allow test set to warm up for at least
switch (7) to lowest multiplier at which CAPAC-
five minutes.
ITANCE INDICATOR (6) pointers come to rest.
For example, if capacitance being measured is
e. Set CAP-RES CHECK switch (13) to CAP.
270 pF, CAPACITANCE INDICATOR' (6) pointers
f. Check calibration of CAPACITANCE lN-
will come to rest when Capacitance RANGE SE-
DICATOR (6) as follows:
LECTOR switch (7) is set to X50, X10, and X3 po-
sitions. Although the capacitance indicated on
(1) Set FUNCTION SELECTOR switch
CAPACITANCE INDICATOR (6) can be guessed
(25) to CAP IND ZERO CAL and Capacitance
at the X50 setting of the Capacitance RANGE SE-
RANGE SELECTOR switch (7) to X1.
LECTOR switch (7), and approximated at the X10
( 2 ) Check that CAPACITANCE lNDl-
setting, an accurate value can be measured only
CATOR (6) reads 0 pF. If not, remove Capac-
at the X3 setting. If Capacitance RANGE SE-
itance ZERO ADJ control (9) protective cap and,
LECTOR switch (7) is too low to measure capac-
using insulated screwdriver, adjust capacitance
itance of tank unit probe, CAPACITANCE lNDl-
ZERO ADJ control (9) until CAPACITANCE lNDl-
CATOR (6) pointers will rotate clockwise without
CATOR (6) reads exactly 0 pF.
stopping. In the example given, setting Capac-
itance RANGE SELECTOR switch (7) to X3 will
(3) Set FUNCTION SELECTOR switch
cause CAPACITANCE INDICATOR (6) to indicate
(25) to CAP IND HIGH CAL and Capacitance
90. Multiply reading displayed on CAPACITANCE
RANGE SELECTOR switch (7) to X50.
I N D I C A T O R (6) by setting on Capacitance
( 4 ) Check that CAPACITANCE lNDl-
RANGE SELECTOR switch (7) to determine actu-
CATOR (6) reads value stamped on STANDARD
al capacitance in pF.
CAPACITOR MMF nameplate (24). If not, remove
For example:
Capacitance HIGH ADJ control (8) protective cap
and use insulated screwdriver to adjust control (8)
CAPACITANCE
INDICATOR
until CAPACITANCE INDICATOR (6) reads ex-
display=
90
actly value stamped on STANDARD CAPACITOR
Capacitance RANGE SELECTOR
MMF nameplate (24).
x3
switch setting=
(5) Repeat steps (1) through (4) above as
Actual capacitance=
270pF
often as necessary until proper indications are ob-
tained.
NOTE
(6) Reinstall protective caps on Capac-
When power is removed from test set,
itance ZERO ADJ (9) and HIGH ADJ (8) controls.
reading displayed on CAPAClTANCE
lNDICATOR (6) may not return to zero.
g . Set Capacitance RANGE SELECTOR
No harm or damage will result to the
switch (7) to X50.
test set if CAPACITANCE INDICATOR
does not indicate a reading of zero.
h. To measure tank unit main probe capac-
itance, set FUNCTION SELECTOR switch (25) to
j.  When all tank unit probe capacitance
TANK UNIT TEST-UNSH position. To measure
measurements have been made, set Power ON/
tank unit compensator probe capacitance, set
OFF switch (2) to OFF.
FUNCTION SELECTOR switch (25) to TANK
k. Disconnect test set from aircraft and re-
UNIT TEST-COMP.
connect aircraft wiring.
2-11

Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business