Guildline 9340 Series, Техническое руководство

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Section 1
TM9340-G-00
15 August, 2019
1-2
1.2. FEATURES
The main features of the Model 9340 series are:
•
Resistance range from .01

to 11 T

•
Accuracy better than

0.01%
•
Temperature coefficient less than 5 ppm/
o
C
•
Zero resistance less than 1 m

/decade
•
High reliability switches noted for 1,000,000 cycles
1.3. GENERAL THEORY
The 9340 series of decade boxes consist of 3, 4, 5, 6 or 7 decades of resistors switched in
a series circuit. Figure 1-1 illustrates schematically the circuit of the Model 9347. The
Models 9343, 9344, 9345, 9346 and 9347 are identical except for the number of decades.
The value of the resistances are related to the total resistance of the unit. These values
are listed in Table 2-2.
Figure 1-2: Decade Box Schematic Diagram
R1 R2 R3 R4 R5 R6 R7
RED
BLK
GRN
R1 R2 R3 R4 R5 R6 R7
R1 R2 R3 R4 R5 R6 R7
R1 R2 R3 R4 R5 R6 R7
R1 R2 R3 R4 R5 R6 R7
R1 R2 R3 R4 R5 R6 R7
R1 R2 R3 R4 R5 R6 R7
R1 R2 R3 R4 R5 R6 R7
R1 R2 R3 R4 R5 R6 R7
R1 R2 R3 R4 R5 R6 R7
Outer Case