Guildline 6530 Series, Руководство оператора

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Section 1
OM6530-C1-00
19 November, 2019
1-3
Figure 1-3: 6530 Simplified Block Diagram
1.1.2. PRINCIPLE OF OPERATION
The simplified block diagram of Figure 1-3 details the major components of the
TeraOhm Bridge-Meter.
When measuring resistance, a known DC test voltage is supplied by the 6530, which
causes a current to flow through the unknown resistor into an integrator. The magnitude
of this current is determined by the time required for the integrator output to pass
between two different threshold voltage points. Knowing the test voltage and magnitude
of the current, the microprocessor can determine the value of the unknown resistor. The
test voltage is selectable from 7 standard values in the range ± (1 to 1000) DC V. The
standard values are: ± (1; 3; 10; 30; 100; 300; 1000) DC V. Custom voltage values can
be provided upon request.
COMPARATO
R
CONTROL
THRESHOLD VOLTAGE
DETECTOR
+
-
27 pF
270 pF
2700 pF
10V
THRESHOLD
1V
THRESHOLD
0.1V
THRESHOLD
x
100
x
10
x
1.0
LOGIC
CONTROL
CONTROL
x -
1
INTEGRATOR
UNKNOWN RESISTANCE
OR CURRENT
MICROPROCESSOR AND MEMORY
GPIB
INTERFACE
TIME
MEASUREMENT
TEST VOLTAGE
POWER SUPPLY
DISPLA
Y PANEL SWITCHES
RS232
INTERFACE
+/- 10 VOLT
REFERENC
E
CONTROL
CONTROL