3
2
1
+
-
Page2of 8
Filename:Amp-e2.tcw
AMP-E
SCHEMATIC
BLACK
RED
10OHM
7.5OHM
LM338
REGULATOR
BOTTOMVIEW
TCDGAIN
SWITCH
U3
R30
1K
Q1
2N3903
HIGH
OFF
LOW
HIGHGAIN
LOWGAIN
ac
ac
BRIDGE
RECTIFIER
-
+
18VAC
INPUTFROM
TRANSFORMER
PINS15&16
4700uF, 35V
CAPACITOR
+
BR805D
R1
20K
+12V
FROMDISPLAY
BOARD
LOCALSETPOINT
10mV = 1 PSI
GREEN
WIRE
OFPHONE
CABLE
FROM
DISPLAY
BOARD.
TCD
PROTECT
"LOCAL
SETPOINT"
J1
REDWIREOF
PHONECABLE
FROMDISPLAY
BOARD.
TCDPROTECT
"TOTAL SETPOINT"
(CARRIERPRESSURE
ACTUAL FROMDISPLAY
BOARD. 10mV = 1 PSI)
J1
+12V
RELAYOPENS IF
CARRIERPRESSURE
ISLESSTHANSETPOINT
RELAY1
BLACKWIREOF
PHONECABLE
TODISPLAYBD.
"TCDPROTECT LED"
TO
DISPLAY
BOARD
R29
1K
J1
YELLOWWIREOF
PHONECABLE
TODISPLAYBD.
TCDPROTECT
"ACTUAL"
(VOLTAGE TO
GROUNDONRED
FILAMENT)
TCDSECTIONOFAMPLIFIERBOARD
453K
1K
R32
1M
R31
C22
0.1uF
C23
0.1uF
NOTE: MODEL 310 STUDENT TCD
G.C.s ANDMODEL 110 STANDALONE
DETECTORSDONOTHAVEANA/D
BOARD. THESEMODELSREQUIRE
ZEROPOTSANDATTENUATORS TO
ADJUST THEDETECTOROUTPUTS
TO THEIRDESIRED LEVEL. SEE THE
"ZEROPOTSANDATTENUATORS"
PAGE INTHISSECTION.
BK
R
B
G
TCD
HEAT
FROM
HEAT
BOARD
THERMO-
COUPLE
TO
HEAT
BOARD
CHASSIS
MOUNTED
TCDCELL
SCREW
TERMINAL
ONAMPBD.
Date: 12/20/97
By:M.Watts
By:R. Fenske
Rev.Date:10/08/03
GREEN
BLUE
BLK SIGNAL
OUTTO
A/D
BOARD
ZERO
WHT
REPLACERESISTOR
ATR32WITHA JUMPER
NOTE:FOR
MULTIGAS2
ONLY
