User`s guide
M3000A/M3046AM3015A/M3016A Service Guide
1-38 Introduction to the Instrument
Each temperature value consists of 16 averaged samples and the test resistor verifies the
linearity of the measurement. With an offset resistor all offsets are eliminated.
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The CPU switches between two different A/D converter controls and wave processing
algorithms depending on the connected transducer: Pressure or Temperature. To recognize
the presence of a pressure transducer, a coding within the transducer is checked. To recognize
the presence of a temperature transducer, the transducer’s resistance is measured and must be
within specified limits. This is only done when no pressure transducer is present.
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This module is responsible for the A/D conversion of the analog signal from the temperature
transducer. The Signal Acquisition module provides a raw temperature value to the Average
Calculation module. The module also performs various self-tests and consistency checks to
ensure proper operation and reports errors and failures to the Alarming Module.
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This component averages the raw measured temperature values over an interval of 1 second.
The averaged values are converted to the user-selected unit.
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This component generates high/low alarms if an alarm limit is exceeded. Additionally, a
technical alarm is generated if no temperature can be measured.
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This component controls the user-selected settings:
• Set temperature alarm limits
• Select the temperature measurement units
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Average
Calculation
Temperature
Alarming
Temperature
Controls
Pressure Waveform
Temp. Value
Temp. User Controls
Temp. Alarms
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