TM 55-2090-201-14&P
3-49. MINI-PROBE, TYPE A AND B SEPARATORS (Continued).
L O C A T I O N
ITEM
ACTION
R E M A R K S
2.
Type B Mini-probe
Meter
Reading
Test Procedure
(VDC)
Test Conditions
R e m a r k s
1. To verify 24
VDC output of
power supply:
A. Unlock, open
control pan-
el (1) and,
B. Connect a
test meter
across ter-
minals con-
tacts 8 and
9 on terminal
board TB1
2. Verify the
operation of
the first
stage (pre-
filter) mini-
probe (4) and
the printed
circuit board:
1. Auto controls
switch (2) and
facility power
are on, supply
pump switch
(3) is on.
24
2. Facility power
and auto con-
1.
If there is no out-
put power, check
that facility power
is on. Electrical
input lines must
be connected pro-
perly. There
should be no loose
or broken wires.
Check that the l-
amp fast blow fuse
is not blown.
120
VDC facility input
power can be read
across terminal
contacts 14 and 17.
2. The normal opera-
tion of the mini-
trols switch (2)
probe is to trans-
are on:
pump
switch (3) on;
mit a 24 VDC sig-
nal to open the
both mini-probes
solenoid operated
(4 and 5) im-
oil discharge valve
mersed in water.
and close the sole-
noid operated water
discharge valve
only when the mini-
probe senses oil or
air.
The mini-
probe should be
replaced if either
a signal is gene-
rated while the
mini-probe is in
water or a signal
is not transmit-
ted when the first
stage (prefilter)
3-382
