Sensor Parameter Setting For Co2 And N2; Function; Processing The Measuring Signals - TESTO 6457 Instruction Manual

• Sensor parameter setting for CO2 and N2

Six measuring points are parametrised with specified nominal widths,
standard temperatures and pressures for nitrogen or carbon dioxide,
then moved to the test stand where the standard volume is tested.
4.3

Function

▪ The flow is monitored by a calorimetric measuring system, the
measuring signals are evaluated by the electronics.
▪ The instrument records the media temperature during flow as an
additional process value.
▪ The instrument displays the current process values.
▪ The instrument has extensive self-diagnostic capabilities.
▪ A simulation mode enables simple commissioning of the sensor.
4.3.1

Processing the measuring signals

The instrument generates 2 output signals according to the parameter
settings:
OUT1: 5 options
- Switching signal for flow quantity limit value
- Switching signal for temperature limit value
- Switching signal for preset counter
- Pulse signal for quantity counter
- OFF (output switched to high impedance)
OUT2: 9 options
- Switching signal for flow quantity limit value
- Switching signal for temperature limit value
- Switching signal for preset counter
- Switching signal for quantity counter
- Analog signal for flow quantity
- Analog signal for temperature
- Input for external counter reset signal (InD)
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