Emerson 755A 用户手册
Instruction Manual
245364-V
May 2002
Rosemount Analytical Inc. A Division of Emerson Process Management Installation 2-3
Model 755A
R2 R1
R3
R4
R4
R5
R6
R6
R8
R9
R9
CR2
U6
I G O
U3
U2
1
2
3
4
I
G
O
C5
C4
C2
U4
U5
I G O
C3 CR1 C1
U1
J1
JP3
Control Board
Current Output
Board
Board
5V 1V 0.1V 0.01V
Recorder Output Voltage
Selection Jumper
Selection Jumper
Figure 2-2. Control Board
Figure 2-3. Connections for Potentiometric Recorder with Non-Standard Span
755A
Analyzer
Potentiometric
Recorder
Input
Terminals
Terminals
(Make sure polarity
is correct)
is correct)
Voltage Divider
(Customer Supplied)
(Customer Supplied)
Position of Recorder Output
Selector Plug
Selector Plug
Minimum Permissible
Resistance for R1 + R2
Resistance for R1 + R2
10 mV 1K Ohm
100 mV 10K Ohm
1 V 100K Ohm
5 V 2K Ohm