Analytical Gas Monitoring System : User Guide

Author(s)

Chris Bennight

Original

8/10/2010

Revision

V378P, Sept 2018

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

Quick Start

Load the web page: {*}{_}http://web.ship.iodp.tamu.edu/tasapps/gasstatus_* on any computer on the ship to view the current status of gas supply (Figure 1).

Image Removed

Hardware

This system comprises four pieces of hardware purchased from DataQ Instruments (http://www.dataq.com).

Part Number

Description

Quantity

DI-718B-E

Ethernet data logger/data acquisition system

1

DI-8B38-05

Isolated signal conditioning module, strain, 10 VDC, 2 mV/V

3

FSH00827

Female port pressure sensor (PFP350 Series) 0-3000psi

3

FSH01785

Thirty foot cable with LEMO connector.

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.

Image Added
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).

cDaq-

The data acquisition system is an input-conditioned intrinsically safe Ethernet-based data logger and data acquisition board. It has 8 input channels, of which we currently use 3. The device collects data from the module installed in each of these inputs and sends it over an Ethernet network to client software (either WinDaq or client software written using the DataQ SDK).
The device is currently installed in the lower pallet stores, against the back wall.
The Mac address is 00:29:4A:C4:59:E8. It connects via Ethernet to port 39 in the pallet stores.
Image Removed
Data logger 
Image Removed
Data acquisition board

Image Removed

Image Removed

8B38 Isolated signal conditioning module

Three of these signal conditioning modules are currently installed in the data logger. They provide electrical isolation and signal conditioning necessary to convert the output of the pressure sensors to a 0–5 V final output range.

One of these units is required for each sensor connected to the data logger, up to a maximum of 8.

Image Removed

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.

Image Added

NI-9237/779521-01

 The NI-9237 includes all signal conditioning required to power and measure up to four bridge-based sensors simultaneously.

Image Added

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.

Software

Software

The data logging portion of this system is composed of two parts:

• WinDaq to communicate with the actual logger and perform the data translation
• GasMonitor, in-house .NET software that communicates with WinDaq to collect sensor data and then with Web services to store the data in a database

Data Logging Services

The DataQ Instrument Hardware Manager searches the network for available data loggers. If none are detected, verify that the DI-718 logger has power and is connected to the Ethernet. If the status light near the ethernet port is red (Figure 7), power cycle the device (unplug/plug in power). The data logger can only be attached to one instance of the DataQ hardware manager/WinDaq at a time, so typically one computer is designated as the data collection box.
To start software monitoring of gas pressure, follow these steps:

1. Start DataQ Instrument Hardware Manager.
2. Once a logger has been detected (Figure 11), select the Start WinDaq button.
3. WinDaq can be run in default mode (Figure 12).
4. An ISO of the WinDaq CD is located on the ship developer box under /Volumes/Ozymandias/ConfigurationManagement/software/WinDaq/windaq_april_15_2010.iso
5. Close the DataQ Instrument Hardware Manager screen.
6. Once WinDaq is communicating with the data logger, start the Gas Data Collector software (Figure 13) ({*}{_}http://web.ship.iodp.tamu.edu/tasapps/gasmonitor_*).
7. This requires the .NET 3.5 run time and WinDaq to be installed. Source code is located at {*}{_}https://shiptest.ship.iodp.tamu.edu/svn/jr/NET/GasMonitorUploader_*)
8. Press Start, then minimize the application and leave running in the background.

Image Removed

Image Removed

Image Removed

Database/Webservices

The data back end consists 2 parts:

• A database table: LIMS.MONITOR (see below)
• A set of Web services: resteasy-monitor

Column Name

Data Type

Nullable

MONITOR_ID

NUMBER

No

TIMELOGGED

TIMESTAMP(6)

Yes

EXPEDITION

VARCHAR2(20 BYTE)

Yes

DATA_GROUP

VARCHAR2(100 BYTE)

Yes

DATA_DURATION

VARCHAR2(100 BYTE)

Yes

DATA_INSTRUMENT

VARCHAR2(100 BYTE)

Yes

DATA_SENSOR

VARCHAR2(100 BYTE)

Yes

DATA_LOCATION

VARCHAR2(100 BYTE)

Yes

DATA_COMMENTS

VARCHAR2(4000 BYTE)

Yes

DATA_NAME

VARCHAR2(50 BYTE)

Yes

DATA_VALUE

VARCHAR2(50 BYTE)

Yes

DATA_UNITS

VARCHAR2(20 BYTE)

Yes

DATA_LOGGED_BY

VARCHAR2(50 BYTE)

Yes

Data Reporting Services

GasStatus is the only current data reporting service for the system. Data is reported in one of two ways:

• Overview/alarm display (Figure 14)
• Gas details display (Figure 15)

Overview/alarm display

This display allows the user to view the actual pressure of any configured analytical gas. The check box near the Alarm label enables or disables the alarm's audible alert. Use the entry field under the Alarm label to set the pressure at which, when both banks decrease below this value, an alarm condition will exist. If enabled, an audible alarm will sound and the color of the status circle will change from green to red.

Image Removed

Gas details view

This view provides a detailed history of each gas bank. The current status is displayed for the selected gas, as well as a visual indicator (gauge). A history displays the history of gas pressures over time. Access the details view by clicking on the desired analytical gas in the top menu. This reporting page can be accessed at [{*}{_}http://web.ship.iodp.tamu.edu/tasapps/gasstatus._*

Image Removed

Archived Versions

LMUG-AnalyticalGasMonitoring-230220-1710-106.pdf