Having one instrument that does all of this begs the question: "How hard is this thing to install and use?"
The Master Thermometer receives and displays data from four sensors. Whether the sensors are sending temperatures from refrigerators, freezers, incubators, or rooms the current condition each sensor sees it displayed on the 'Current Status' screen and on the individual charts. The maximum and minimum temperature is also displayed along with the battery level of each senor if the senor is wirelessly transmitting to the monitor. The maximum and minimum temperature can be reset or 'zeroed' out by touching the display so that it starts over again. This is useful if the user needs to routinely record the maximum and minimum temperature during some period of time.
The display also reflects the safety condition of each refrigerator or freezer. The current temperature along with the maximum and minimum temperature appear in green as long as the temperature is within the safe range. However, if the temperature moves above the high alarm point it immediately turns red. Once the temperature moves back into the safe zone it again turns green, except for the maximum temperature which stays red until it is reset. Because the color of the temperature reflects the conditions of the refrigerator It only takes a quick glance at the display to see if the temperature is safe or not.
Since a delay can be set for the actual high and low temperature alarms it is possible for a temperature to appear red, indicating it is outside the safe zone, without an alarm being triggered. So a temperature that gets too warm and then cools off before the delay time elapses would show as red and then green, but no alarm would sound.
The sensor battery indication on the display will turn red if the battery voltage drops below 20% to alert the user to the need to replace it.
The Master Thermometer has an external normally open (N/O), dry contact relay, to trigger a phone call when an alarm occurs. The optional Auto Dialer will call four or more phone numbers and leave a message to alert you when an alarm occurs. The external relay connection can also be wired into a building alarm system or used to trigger an powered external alarm.
The Master Thermometer can also send an email or text alert if an alarm occurs as long as the Master Thermometer is plugged into a computer and you are using our PC interface software, TView, with the email option.
The TView software is a powerful part of the Master Thermometer. It runs on your computer and can be configured to automatically copy the stored temperatures to your computer, in addition to downloading data on-demand. This ensures that you will always have a backup of your temperature history.
It can also be used to display current temperatures on your computer from multiple TV2s. So if you are using five monitors to keep tabs on twenty different refrigerators you could have a mini-chart displayed for each one of them on your computer. This mini chart would show the last 100 saved temperature readings along with the current temperature. And should an alarm occur, the temperature immediately turns red.
Our optional Email software will send an email or text message when an alarm occurs as long as the Master Thermometer is attached to a USB port on your computer. The USB power/interface cable can be plugged into any USB port on your computer. Once the connection between your computer and the TV2 has been established an automatic download can be started so that every few seconds the collected data stored in the TV2 will be copied onto your computer. This automatic backup can be accessed at any time to view the temperature history or print out charts for audits.
Whether you are protecting vaccines your patients depend on, laboratory experiments in process, priceless art treasures, or airplane wings stored at a constant temperature and humidity the Master Thermometer ensures all is well.
If you are storing tissue samples or human embryos in a -80° freezer you can sleep easy at night knowing that the Master Thermometer is on the job. If the temperature in a refrigerator or freezer gets too high or low it will notify you either with a phone call, email or text so you can move the product to a safe location.
The Master Thermometer keeps a log of all the temperatures so you can verify that your refrigerators and freezers have maintained a safe temperature. And printing out a chart for the auditors or inspectors is simple. The Master Thermometers stores over 1.5 years of temperature history for each of the cold storage units being monitored. All of that stored history can be copied over to your computer with the free TView software.
TV2, the Master Thermometer, has a number of alarms which have to do with the TV2 itself, and additional alarms for the sensors or the conditions being monitored by the sensors. All alarms are indicated visually on the TV2 with a message, a blinking screen and in some cases will cause an area of the screen to turn red. Some alarms are logged in the TV2 non-volatile memory and in files stored on your computer. Additionally if the TV2 is wired to a computer at the time an alarm occurs they will be indicated on the computer in real time.
All temperature and humidity alarms cause the external normally-open (N/O) relay to close. This can be used to trigger an auto dialer so that phone calls are made to alert the staff that an unsafe condition has occurred
Your temperature data is stored in non-volatile memory so even if you turn the Master Thermometer off and come back 10 years later all of your data will still be there.
During power outages the internal batteries (3 AA) will continue to operate the TV2 for up to 40 hours. And by operate we mean everything continues to work as if it was not operating on batteries:
The Master Thermometer can be used anywhere temperature or humidity is a critical condition.
Since the Master Thermometer can track four different temperatures and humidity readings simultaneously you only need one display for all four sensors. This lowers the cost of monitoring multiple areas and means that you only have to look at one display to see what the current conditions are for all four areas. The picture at the right is of one fourth of the current status display showing the current conditions for one of the four sensors and the maximum and minimum temperature recorded. The current battery charge for the sensor is also displayed.
In addition to the current status display you can also view the historical conditions for each area. The Master Thermometer has an 'Easy Touch' display for simple operation. To look at detailed information for one of the sensors you simply touch that temperature.
With one touch on the display a temperature chart immediately opens up so you can see what happened last night, last week, last month or even last year. To see additional temperature history just touch the display again and scroll bars will appear on the chart. The chart can be scrolled to the left or right to show earlier data. It can also be zoomed into or out of to show much more historical information. The chart is not only paperless it is never ending. Once all of the non-volatile memory is filled with data the newer data will roll over oldest data, so you will always have the last 80,000 measurements stored for each sensor.
Being able to see the temperature history makes it easy to spot trends. This is particularly useful for troubleshooting issues with refrigerators, freezers or areas in a warehouse or building.
Once the temperature and/or humidity data is collected from the sensors it is stored in the non-volatile memory of the Master Thermometer. It is impossible for the user to change the data once this happens. It can only be viewed on the monitor, not changed.
It can be downloaded with the TView software so that it can be seen on a computer and even saved as a file on a computer but as it is saved it is encrypted with a 256 bit encryption algorithm. And once this happens it can only be viewed and/or printed out as a chart with the TView software. If a saved chart is opened with the TView software a small 'padlock' icon is displayed indicated that the file is encrypted. Additionally another icon indicated whether the file has been verified or not. Verification indicates that a username and password has been entered which exactly matches the username and password that was used to download the data from the Master Thermometer.
Likewise if a chart is printed out from TView a 'signature verified' or 'signature unverified' text box will appear at the top of the printed chart. This procedure is followed to ensure that the 21 CFR 11 standard is complied with.
The data can also be exported in unencrypted form to Excel where it can be viewed and manipulated if the user wants to analyze it. In this case the data is not encrypted and no padlock or verification indication is shown. The padlock and verification pen only appears on printouts or on a computer screen if the data integrity has been maintained. This is comply with various regulations, such as 21 CFR 11.
© 2009 Two Dimensional Instruments, LLC