299
Input Circuit Schematics
11.12
Input Circuit Schematics
This section provides input circuit schematics for the instrument.
Analog input circuit: U8550, U8551, U8552, LR8530, LR8531, LR8532
• Voltage (10 mV f.s. to 2 V f.s. ranges), thermocouple
+
-
Channel switching relay
• Voltage (10 V f.s. to 100 V f.s. ranges, 1-5 V f.s. range), humidity
+
-
Channel switching relay
1 M
Ω
• Resistance temperature detector (4-wire), resistance
+
-
SoH
SoL
Channel switching relay
Constant-current circuit
SoL terminal is common to all channels.
11
Knowledge and Information
Summary of Contents for LR8450
Page 68: ...64 Observing Waveforms Alarm...
Page 72: ...68 Observing Waveforms 3 Numerical calculation Numerical calculation results...
Page 131: ...128 Acquiring Data with a Computer PC...
Page 175: ...172 Controlling the System...
Page 233: ...230 Controlling the Instrument with Communication Commands...
Page 271: ...268 Plug in Module Specifications...