Campbell-scientific EC150 CO2 and H2O Open-Path Gas Analyzer and EC100 Bedienungsanleitung Seite 54
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Appendix A. EC150 Settings
3. The option of a third barometer choice is also available but is rarely
used. A user-supplied barometer option can also be programmed in
the EC100 electronics. This setting determines which pressure sensor
will be used to measure the barometric pressure.
User-supplied Barometer:
When a user supplies a barometer, the setting should be changed to
User Supplied and the appropriate values for gain and offset must be
entered.
Sampling Frequency:
The enhanced barometer is sampled at 1 Hz. If the user supplies an external
pressure sensor, it is sampled at 1 Hz. The on-board pressure sensor is
measured at 10 Hz. In all cases, the pressure sensor measurement is not
synchronized to the CO
2
and H
2
O measurements.
The pressure sensor also allows the setting None for the Pressure Sensor.
This mode is intended for troubleshooting only. The EC100 will use a fixed
value for pressure.
The Pressure Sensor setting is stored in non-volatile memory in the EC150
head.
A.2.10.1 Pressure Gain
This setting is not used unless the Pressure Sensor is set to User Supplied.
Then this setting gives the gain factor (kPa/V) used to convert measured
voltage to pressure. If the Pressure Sensor is set to EC100 Basic or EC100
Enhanced, this setting is not used.
The Pressure Gain setting is stored in non-volatile memory of the EC100.
A.2.10.2 Pressure Offset
This setting is not used unless the Pressure Sensor is set to User Supplied.
Then this setting gives the offset (kPa) used to convert measured voltage to
pressure. If the Pressure Sensor is set to EC100 Basic or EC100 Enhanced,
this setting is not used.
The Pressure Offset setting is stored in the EC100 electronics.
A.2.10.3 Fixed Pressure Value
If the Pressure Sensor setting is None, the EC150 will use the value of this
setting for the barometric pressure. This mode is intended for troubleshooting
only. In normal operation this setting is not used.
The Fixed Pressure Value setting is stored in the EC100 electronics.
A.2.11 Pressure Differential Enable
This setting should remain disabled. It is used only for closed-path analyzers.
The Pressure Differential Enable setting is stored in non-volatile memory in
the EC150 head.
A-6
- INSTRUCTION MANUAL 1
- Limited Warranty 3
- Assistance 4
- Precautions 5
- Table of Contents 7
- Figures 9
- EC150 CO 11
- O Open-Path Gas 11
- Analyzer 11
- 3. Initial Inspection 12
- 4. Overview 12
- 4.3 Gas Head Memory 13
- 4.6.2 EC100 Outputs 14
- 4.8 Theory of Operation 16
- 5. Specifications 17
- 5.2 Output Signals 19
- 5.3 Physical Description 19
- 5.4 Power Requirements 20
- 6. Installation 21
- 6.3 Wiring and Connections 29
- 7. Zero and Span 32
- 7.2 Zero and Span Procedure 33
- or gain) for CO 37
- 8.2 Gas Analyzer Wicks 38
- 8.4 Zero and Span 39
- 8.5 Replacing CO 40
- Scrubber Bottles 40
- 8.6 Factory Recalibration 41
- 8.7 Troubleshooting 42
- 8.7.4 Diagnostic Flags 43
- Appendix A. EC150 Settings 49
- A.2.1 SDM Address 50
- A.2.2 Bandwidth 50
- A.2.3 Unprompted Output 50
- A.2.5 RS-485 Baud Rate 51
- A.2.6 Analog Output 51
- A.2.7 ECMon Update Rate 51
- A.2.8 Temperature Sensor 51
- A.2.10 Pressure Sensor 52
- A.2.10.1 Pressure Gain 54
- A.2.10.2 Pressure Offset 54
- A.3 ECMon 55
- A.6 Example CRBasic Program 60
- C.1 USB or RS-485 Output 65
- C.2 Analog Output 67
- Analog Outputs 68
- 109.5102.300072.1 PTPf 70
- Sheets (MSDS) 73
- E.2 Decarbite MSDS 80
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