Fluke 732B - Page 58

732B/734A
Instruction Manual
4-4
OVEN
TEMPERATURE
CONTROLLER
OVEN ASSEMBLY
10V SERIES
PASS CIRCUIT
GUARD
CHASSIS GROUND
LO BAT LED
IN CAL LED
1.018V LO
10V SENSE LO
10V BIAS LO
COM1
10V INPUT HI
10V BIAS HI
10V HI OUTPUT
STAGE
1.018V COM
1.018V HI
10V COM
10V HI
GROUND
10 VOLT
REFERENCE
CIRCUIT
BCD SWITCH
BOARD
10V SENSE HI
1.018V HI
AC POWER ON LED
RECTIFIER
AND FILTER
BATTERY
+11.5V
REGULATOR
K500
BATTERY
DISCONNECT
SWITCH
PTC
PTC
NOTE: RELAY
ENERGIZED
WHEN AC
POWER ON
-6V
REGULATOR
11.5V
REGULATOR
SENSING. LOGIC AND
COMPARATOR CIRCUITRY
POWER SUPPLY ASSEMBLY
IN CAL LOGIC OUTPUT
(ISOLATED)
CHASSIS GROUND
OVEN TEMPERATURE 1A OVEN TEMPERATURE 1B
EXT-BATT AC NEUTRAL AC LINE
AC LINE SWITCHES
AND LINE FILTER
POWER TRANSFORMER
BATTERY
CHARGER
BATTERY CHARGER ON LED
VOLTAGE GUARD
k16f.eps
Figure 4-1. 732B Overall Block Diagram
www.valuetronics.com