FAQs

Below are some of our frequently asked questions and their answers.

Click on a question from the following list to view the answer:

Answers - General

1. Can you provide a redundant tank gauging system?

Yes, a fully redundant system would start with at least 2 gauges on the tank. Each gauge would be cabled back to a separate interface device via separate cabling. Ideally each gauge should have dual independent fieldbus lines so that it could be connected to both redundant interface units. The interface unit could be a simple converter or a standalone data acquisition system. Each interface unit could then be connected to at least two host systems. A host system could be a tank gauging P.C. or D.C.S. The system should have no loss of functionality for a single sub-system failure e.g. tank gauge or interface unit.

∧ Back to top

2. Does your tank gauging system meet the requirements of the Buncefield recommendations?

Yes, the systems specifically addresses Recommendations 2, 8 & 9 to the extent possible by a tank gauging system. In brief, the system has extensive use of gauge diagnostics to check validity of data, provides automated and manual test facilities to verify the operation of the gauge and its alarms, and can store critical records both on and off-site for analysis. For more information please contact our office.

∧ Back to top

3. Can your system be provided in different languages?

Yes, the total system has been “internationalised” where it can easily be translated to any language and it supports both imperial and S.I. units. For a list of languages already supported please contact our office.

∧ Back to top

4. What operating systems do you support?

Microsoft Windows Server 2003, Windows XP Professional, Windows Vista.

∧ Back to top

5. What database does your system use?

Microsoft SQL Server

∧ Back to top

6. What PC specification do I need to run your tank gauging software?

It depends on the application e.g. no. of tanks, no. of host/field interfaces etc. In general, most standalone applications with Windows XP can be run on a PC with the following specification:

 

  • 2.5 GHz Pentium (min), 2 Gb RAM (min)
    160Gb Hard Drive (min)
    20” Flat Panel Monitor (resolution 1280 x 1024 min)
    2 Serial RS232 interfaces
    2 x serial ports, 2 x USB ports

 

For a more detailed specification please contact the office with details of your application.

∧ Back to top

7. Does your system calculate volumes to any recognized standards?

Yes, the system calculates volumes to all the common API/ASTM standards e.g. Table 54A, 54B etc. For a complete list please contact the office.

∧ Back to top

8. I have gauges from several different vendors e.g. Enraf, Saab, Whessoe and want to get all the data into a single inventory management system. Can it be achieved?

Yes it can. MHT Technology Ltd offer a range of open, scalable solutions that are designed to interface to any gauge vendor. Their Datacon unit has all the native fieldbuses out of one box; the Datacon is a data acquisition system which can provide multiple host interfaces to a range of systems including an inventory management system, site PLC, or SCADA system all at the same time if necessary.

∧ Back to top

9. My tank gauging system comprises old legacy tank gauges which according to the manufacturer are obsolete. They want to sell me a complete new system but I would like to upgrade in stages and make a choice of different vendors. Can this be achieved?

Yes it can. MHT Technology have a product called a gauge emulator that allows you to install another vendors gauge onto an existing system without having to change any of the cabling infrastructure. It can be used as a one to one replacement or it can be used in a one to many mode where you can replace multiple gauges to a different vendor transparent to the remainder of the system. In addition MHT could replace the old tank inventory management system in the control room and interface to the old legacy gauges.

∧ Back to top

10. We would like to upgrade our inventory management system and in the process achieve compliance with the appropriate Buncefield Requirements. Is there currently a system on the market that achieves this?

MHT Technology’s system, Visual Tank for Windows (VTW) has been enhanced to include compliance with Recommendation 2, 8 and 9. Most of the features revolve around increased use of gauge diagnostics, validating the operation of devices through new test features, a “black box” flight recorder for logging all changes to the system, a configurable alarm sub-system where alarms can be grouped by severity, enunciated by severity etc and a comprehensive movement system for monitoring tanks whilst they are loading/receiving product.

∧ Back to top

11. We have several tanks where stratification is a problem. Is it possible to buy an instrument that can detect stratification?

Some servo operated level gauges have this capability. In particular the Servo Gauge from Enraf has the ability to make a 10 point profile over the height of the liquid. Clearly, the application of such gauges has to be on “clean” products so that the displacer does not become contaminated. When the profile is uploaded to the host system it can be manually viewed as a graph to see if the tank is stratified. In addition a package called VTW from MHT Technology can automatically analyse the profile to give an alarm if stratification is detected.

∧ Back to top

12. I want to use a radar gauge as an independent alarm gauge and another gauging technology for my Primary level measurement. Can a tank gauging system handle more than one gauge on a tank?

MHT’s software has always been able to handle more than one gauge in a tank. MHT’s have tank gauging software for the LNG market where there is commonly up to 4 gauges on one tank. Where there are more than one gauge on a tank, the system can compare the values from each and provide warnings and alarms to the user if values differ from each other by a pre-configured tolerance.

∧ Back to top