Instruction Manual

Instruction Manual
748213-S
April 2002
Rosemount Analytical Inc. A Division of Emerson Process Management Circuit Analysis 5-3
Model 755R
Figure 5-2. Case Heater Control Circuit
Figure 5-3. Ramp Generator Circuit
120 V
RMS
T1
19 VAC
TO POWER
SUPPLY
19 VAC
12
R67
10K
R72
4.75K
C36
.18uF
CR10
CR9
-15V
R71
21.5K
R69
2 M
R68
3.3K
R70
20M
R73
20M
R74
590K
+15V
-
+
1
-
+
2
-
+
3
-
+
4
R75
210K
R85
11.0K
R86
20M
R76
37.4K
C40
2200uF
C37
1.0uF
C39
.01uF
R83
63.4K
R84
169K
R82
9.07K
RT1
-15V
Q6
R80
10K
R79
10K
R81
56.2
C38
.18uF
R87
10K
R78
249K
R77
10K
CR11
T2
-15V
R74
590K
-
+
3
R75
210K
R76
37.4K
C40
2200uF
C37
1.0uF
Q6
R80
10K
R79
10K
R81
56.2
C38
.18uF
R87
10K
R78
249K
R77
10K
TO
COMPARATOR
R83
63.4K
R84
169K
R82
9.09K
RT1
-15V
-15V to 1.88V
±
0.3V
+15V
+15V
-15V
INPUT FROM
MULTIVIBRATOR
-15V
OFF OFF
OFF
-2.3V
+2.3V
6 Hz
T2