4-10
Troubleshooting
Models 2510 and 2510-AT
Measurement circuits
Signal conditioning for the external temperature sensor is provided by U124, U149, and
associated components. Voltage and current feedback signals from the TEC output terminals
are developed by U147 and U151.
The conditioned temperature sensor, voltage, and current, feedback signals are fed to the
multiplexer IC, U142, that switches among the signals during the various phases of the mea-
surement cycle. The output of the mux is fed to the A/D converter for conversion to digital
data. Additional signals switched by the mux during the measurement cycle include a reference
voltage, reference temperature, internal circuit board temperature signal, and an in15V
measurement.
Sensor conditioning
Figure 4-6 shows a simplified schematic of the sensor conditioning circuits. In this example,
measurement using a 10k
Ω
thermistor is assumed. Sensor conditioning for other thermistor
ranges and sensor types is similar.
+15V
DUT
GND +
GND -
THPFBK
2 Wire
2 Wire
MEAS_10K
SHUNT_10K
10K
100K
Figure 4-6
Sensor conditioning
for 10k
Ω
thermistor
2510-902-01 (E - Mar 2010)(Service).book Page 10 Tuesday, March 16, 2010 1:04 PM
Содержание TEC SourceMeter 2510
Страница 3: ...2510 902 01 E Mar 2010 Service book Page 2 Tuesday March 16 2010 1 04 PM...
Страница 14: ...1 PerformanceVerification 2510 902 01 E Mar 2010 Service book Page 1 Tuesday March 16 2010 1 04 PM...
Страница 28: ...2 Calibration 2510 902 01 E Mar 2010 Service book Page 1 Tuesday March 16 2010 1 04 PM...
Страница 54: ...3 RoutineMaintenance 2510 902 01 E Mar 2010 Service book Page 1 Tuesday March 16 2010 1 04 PM...
Страница 58: ...4 Troubleshooting 2510 902 01 E Mar 2010 Service book Page 1 Tuesday March 16 2010 1 04 PM...
Страница 76: ...5 Disassembly 2510 902 01 E Mar 2010 Service book Page 1 Tuesday March 16 2010 1 04 PM...
Страница 82: ...6 ReplaceableParts 2510 902 01 E Mar 2010 Service book Page 1 Tuesday March 16 2010 1 04 PM...
Страница 92: ...A Specifications 2510 902 01 E Mar 2010 Service book Page 1 Tuesday March 16 2010 2 33 PM...
Страница 96: ...B CalibrationReference 2510 902 01 E Mar 2010 Service book Page 1 Tuesday March 16 2010 1 04 PM...
Страница 110: ...C CalibrationProgram 2510 902 01 E Mar 2010 Service book Page 1 Tuesday March 16 2010 1 04 PM...
Страница 119: ...2510 902 01 E Mar 2010 Service book Page 4 Tuesday March 16 2010 1 04 PM...