TM 11-5820-801-30
c.
Terminal Board El.
as connecting points for VACUUM meter M2 circuits.
(2) The ac voltages listed in the chart below
WARNING
can be measured at tie points EI-16 through El-22.
Voltages dangerous to life exist in Unit 1.
Normal operating voltages shall be applied to Unit 1
(1) For convenience 22 tie points-(fig. 2-17) are
mounted on terminal board El that is mounted to the
voltages. Measurements are given for three conditions:
chassis on standoffs (fig. 3-3). A clear plastic card is
normal operational voltages, voltages that occur when
mounted on standoffs above the terminal board to
Vacuum Vessel Module 2A3 is at atmospheric pressure
protect personnel Seventeen of the 22 tie points on E1
(no vacuum), and voltages that occur when an open
are used (fig. 2-10, 2-15, 2-16). Tie points E1-1 through
circuit exists between VACUUM meter M2 and the
E1-10 are used to mount resistors EIRI, EIR2, EIR3,
vacuum gage circuit 2A3J2 (cable open-WIP4 not
E1R8, and E1R9 respectively, as shown in figures 2-10,
connected to 2A3J2).
2-15 and 2-16. Tie points E1-16 through E1-22 are used
Atmospheric
Open Circuit
Pressure in
(WIP4 Removed
El
Normal Operation
Module 2A3
from 2A3J2)
Tie Points
volts, ac
volts, ac
volts, ac
20-22
0
0
0
20-21
0.2 + 0.02
1.2 + 0 1
0
21-22
0.2 + 0.02
1.2 + 0 1
12+0I
19-22
0.2 + 0.02
1.2 + 0 1
0
19-21
0
0
0
19-20
0.2 + 0.02
1.2 + 0 1
12+ 01
17-18
120 12
120 12
120 + 12
16-18
120 12
120 12
120 + 12
16-17
0
0
0
(3) At tie points E1-1 through E1-10, the
E1
Voltage
Resistance 4
voltage and resistance in the chart below can be
Tie Points
volts, dc-
kilohms
measured. For voltage measurements, normal operating
9-10
6+01
0 75 + 0 1
voltages shall be applied (para 3-2a). Exercise care to
7-8
6+01
0 75 + 0 1
1
5-6
500 + 50
510 + 35
avoid contact wit} dangerous voltages. For resistance
1
3-4
500 + 50
510 35
measurements, first disconnect all cables to Unit 1 and
2
3
1-2
10 0.5
30 + 1.5
disconnect P1 from PS1J1.
d. Temperature Monitor Card A 1.
NOTES
WARNING
1. Voltages at E1 tie points 3-4 and 5-6 increase
Voltages dangerous to life exist in Unit 1.
about 10 V when S2 is set at BEAM. Listed voltages
(1) Voltage measurement on A1 shall be made
are for S2 set at OFF.
with A1 inserted in its socket J4 and normal power
2. Listed voltage is for S2 set to BEAM. When S2 is
applied to Unit 1 (para 3-2a). Connector pins on the card
set to OFF voltage is 27.5 + 3 V.
feed through the card connector so that voltage probes
3. Listed resistance is for S2 set to OFF. When S2 is
can be inserted into the desired pins (from the top of the
set to BEAM, resistance is 11 + -1 kilohms.
chassis) while the card is mounted in J4 (fig. 3-1). When
4. With S4 and S5 set to BYPASS, measure 1 + 0.1
A1 is mounted in J4, pin L is the pin closest to the front
kilohms from J4, pin K to E1-8 (R5 measurement)
panel. Al (and J4) pin layout is as follows: L K J H
and to E1-10 (R6 measurement).
F E D C B A With a multimeter measure
the following voltages:
Pin terminals
K-E
K-C
BF
J-H
volts, dc
-12 + 0.5
+12 + 0.5
0 005 0.002
0.07 + 0 03
Terminals
(kilohms
Terminals
(kilohms)
(2) Resistance measurements can be made on A1 if A1
is removed from Unit 1. The card is firmly fastened in its
B-C
3.1 + 0.3
E-J
12 + 2
B-F1
30 + 3
F-H1
500 + 50
socket (J4) by two nylon screws through the pin
B-K
0.08 + 0.08
F-K1
500 + 50
connector into the socket (fig. 3-3). Remove the screws
C-F
12 + 2
H-K
8+3
and pull out the card. The card, if faulty, shall be
C-K
3.1 + 0.3
replaced, not repaired. Measure the following resistance:
Pin
Resistance
Pin
Resistance
3-5
