SIMMONDS
PRECISION
ON PF
PRESS FOR
TWO TERM.
MEG READINGS
506.6
CHASSIS
M
OFF
PSD60-1
AIRCRAFT ONLY
SIM TU ONLY SIMULATOR
F
SIM TU & COMP U
INDICATOR TANK N
UNITS
TU
MEASURE INT C COMP
T MEASURE EXT
0 2 0 42
LOZ
T
TU
PF COMP
T
LOZ-HIZ
U
10-200 PF
10-2000 PF LOZ-COMP S
COMP-HIZ
HIZ
LOZ-SHLD E
C
L
SHLD H COMP-SHLD
O
E
M
HIZ-SHLD
M
C
P
SHLD-GND
T
COMP
LOZ-GND
COMP-GND
C
HIZ-GND SYSTEM TESTER
ADAPTER
TANK
CABLES
CONNECT TO
AIRFRAME
WING
PSD40-502-3GROUND
CENTER
PSD40-502
DO NOT TO
CONNECT TO PSD40-503 COMPENSATOR
FUEL AND TANK
QUANTITY UNITS
INDICATOR AIRCRAFT
ADAPTER
T-CABLE WIRINGCABLE
SIMMONDS PSD60-1 SYSTEM TESTER
Test Equipment Set-Up for Resistance Measurement
Figure 504 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIMMONDS DIGITAL FUEL ú
28-41-02 QUANTITY INDICATORS ú CONFIG 2
ú 01 Page 521 (SIMMONDS SYSTEM TESTER) ú Jul 15/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500
MAINTENANCE MANUAL
FUNCTION MEASURE SWITCH
FUNCTION HIZ-SHLD SHLD-GND
SIMULATOR COMP-SHLD LOZ-GND
SIMMONDS
LOZ-SHLD
COMP-GND COMP 2 LOZ-COMP HIZ-GND
PRECISION
X100 PF
PF
V1 M^ D1
COMP
D4
COMP-HIZ HIGH TU LOW
FUNCTION
LOZ-HIZ 0-200 PF
S3
TU
SWITCH
MEASURE
SELECT
INT CAP
SIM EXT CAP CAP SELF TEST
MEG MEG
X10 PF V2 FUNCTION SEL S2 D2
0-25 PF
J1 LOZ J4 PSD40-1 COMP
J2 HIZ
TESTER
POWER
J3 COMP
X10 PF V3 INDICATOR TAN
SWITCH
D3
0-25 PF ON
J7 COMP
J9
O F
S1
CHA SIS LOZ 2 HIZ COMP 2
UNSHIELDED
GROUNDED TO
AIRPLANE
COMP COAXIALSTRUCTURE F72731
FUEL QUANTITY INDICATOR
TO COMPENSATOR AND TANK UNITS
DO NOT CONNECT
SIMMONDS PSD40-1 SYSTEM TESTER WITH THE F72731 CABLE
Test Equipment Set-Up for Resistance Measurement
Figure 504 (Sheet 3)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIMMONDS DIGITAL FUEL ú
28-41-02 QUANTITY INDICATORS ú CONFIG 2
ú 01 Page 522 (SIMMONDS SYSTEM TESTER) ú Jul 15/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
C40193
A
737-300/400/500MAINTENANCE MANUAL
E. System Test Procedure
S 975-038-002
(1)
Measure the empty tank resistances.
(a)
Set the power switch on the test unit to ON.
(b)
Set the FUNCTION SEL switch to MEG (not SELF TEST MEG) (PSD40-1) or set the FUNCT switch to MEASURE EXT (PSD60-1).
(c)
Set the FUNCTION MEASURE switch (PSD40-1) or set the SELECT switch (PSD60-1) to LOZ-HIZ.
(d)
Read the total resistance for the tank units.
1) Make sure the resistance shown on the test unit is more than 250 megohms.
(e)
Set the FUNCTION MEASURE switch (PSD40-1) or set the SELECT switch (PSD60-1) to COMP-HIZ.
(f)
Read the total resistance for the compensator.
1) Make sure the resistance shown on the system tester is more than 250 megohms.
(g)
Set the FUNCTION MEASURE switch (PSD40-1) or set the SELECT switch (PSD60-1) to each of the SHLD or GND positions.
(h)
Make sure that each resistance shown on the test unit is more than the applicable minimum resistance: ~................................................. | SWITCH SETTING | MINIMUM RESISTANCE | ................................................... | LOZ-SHLD | 1 Megohm | ................................................... | COMP-SHLD | 1 Megohm | ................................................... | HIZ-SHLD | 1 Megohm | ................................................... | SHLD-GND | 10 Megohms | ................................................... | LOZ-GND | 10 Megohms | ................................................... | COMP-GND | 10 Megohms | ................................................... | HIZ-GND | 10 Megohms | 2.........................….......................1
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