Analytical Gas Monitoring System : User Guide
Introduction
The analytical gas monitoring system is a collection of hardware, software, and infrastructure designed to record, report, and alert interested parties in the current and historical status of various analytical gases. The monitoring system currently comprises 4 primary parts:
- Hardware
- Data logging software
- Database/Web services (??)
- Reporting/viewing software
Data Reporting Services
Data is reported through two Labview gas monitoring programs. One master/main gas monitor which can only be used on one location, and a remote gas monitor for use in other locations. The master version communicates with the loggers and collects data; and the remote version receives data shared by the master version.
Remote gas monitoring display
This display allows the user to view the actual pressure of the Helium and Argon gasses connected on Upper Tween. Red zones indicate that the gas lines should be switched to a new set of bottles. The stop button stops data updating. The play button in the upper left of the window will start it again.
Figure 14. Overview/alarm display screen.
Hardware
This system is comprised of four pieces of hardware purchased from National Instruments (http://www.ni.com/en-us.html).
Part Number | Description | Quantity |
NI-9237/779521-01 | 4-channel C series strain/bridge input module (RJ50 connectors) | 1 |
| cDaq-9181/781496-01 | 1-Slot, ethernet CompactDAQ chassis | 1 |
FSH00827 | Female port pressure sensor (PFP350 Series) 0-3000psi | 3 |
FSH01785 | Thirty foot cable with LEMO connector. | 3 |
cDaq-9181/781496-01
The cDaq 9181 is a chassis used for housing NI C series I/O modules. The chassis controls the timing, synchronization, and data transfer between the module and an external host.
NI-9237/779521-01
The NI-9237 includes all signal conditioning required to power and measure up to four bridge-based sensors simultaneously.
FSH00827 0–3000 psi Futek pressure sensor
The pressure sensor measures pressure in the 0–3000 psi range. It is supplied an excitation of 10 V and has an LEMO connector. Connector pin out is listed on the side of the sensor, with an output positive and negative and excitation positive and negative.
Three of these sensors are currently installed. These require no maintenance or special considerations, other than taking care not to physically crush them when working near them.
0–3000 psi pressure sensor.
30 foot LEMO cables
These 30 foot braided steel shielded cables have a LEMO connector on one end to plug directly into the sensor and 4 bare wire terminals on the other end to connect to the data logger.