The Fluke MET/CAL compatible 1621AH "DewK" Thermo-Hygrometer High-Accuracy Kit with LogWare III Software revolutionizes environmental monitoring for calibration laboratories.

Now users can easily monitor and record conditions throughout the entire facility with the DewK's new Ethernet and wireless connections, and set the upgraded LogWare III software to notify users immediately of changing conditions.

Users will still have the superior convenience, dependability, and NIST-traceable accuracy of a 1620, but the 1620A will give users added accessibility and peace of mind.

Accuracy

Two types of sensors are available from Fluke Calibration, and the DewK may be originally purchased with either one. The high-accuracy sensor reads temperature to ± 0.125 °C over a calibrated range of 16 °C to 24 °C. Relative humidity readings are to ± 1.5 %RH from 20 %RH to 70 %RH.

All DewK sensors come with NVLAP accredited certificates of calibration for both temperature and humidity, complete with data and NIST traceability. Fluke provides exceptional uncertainties, including total test uncertainty ratios better than 3:1 for both temperature and relative humidity-even for the high-accuracy sensors.

Both sensors can also measure temperature below their respective calibrated ranges to 0 °C and above their respective calibrated ranges to 50 °C with typical accuracy of ± 0.5 °C. And RH readings from 0 %RH to 20 %RH and from70 %RH to 100 %RH are typically within ± 3%.

Ethernet and wireless capability

The 1621A-H gives users all the communications options they expect, and then some. With its built-in Ethernet RJ45 jack, multiple DewKs can be monitored from the same screen using our new LogWare III client-server software. Ethernet also gives users the possibility for remote connectivity over the internet, so they can monitor critical conditions while they are away.

Cables running along the floor can be a safety hazard, and cables hanging from the ceiling and walls are an eyesore. With the 1621A-H, users can connect their computer through an RF modem up to 100 ft away, without the clutter of all the extra cables.

Finally, if a printout is necessary, send data to a printer through the RS-232 interface in real time.

Math and statistical functions

In addition to temperature and humidity, the 1621A-H calculates dew point, heat index, and rates of change for both temperature and humidity, without the need to buy additional software. Min, max, and a variety of other statistics are also calculated and can be shown onscreen. Daily summary statistics, including min, max, and maximum rates of change are stored for the most recent sixty days.

Calibrated sensors

Having inputs for two sensors, each measuring both temperature and relative humidity, one DewK can monitor two locations at the same time. Both sensors can be run via extension cables to remote locations up to 100 feet away, or one sensor can be directly mounted to the top of the DewK.

Each sensor is calibrated for both temperature and humidity. The calibration constants assigned to the sensors reside in a memory chip located inside the sensor housing, so sensors may be used interchangeably between different DewKs, and the recalibration of sensors doesn't require an accompanying DewK.

Sensors may also be assigned a unique identifier (up to 16 characters) to facilitate record keeping by matching the sensor identifier with the collected data. Each 1621A-H ships with one sensor, with additional sensors available from Fluke. Spare sensors may also be purchased as a kit, which includes a case for the sensor, a wall mounting bracket, and a 25-foot extension cable.

Memory

The 1621A-H has enough on-board memory to store up to 400,000 date-and time-stamped data points. That's two years' worth of data for both measurements from two sensors if readings are taken every ten minutes.

Alarms and battery backup

Alarm settings can be set up quickly in the 1621A-H based on temperature, the rate of change in temperature, RH, the rate of change in RH, and instrument fault conditions. Alarms can be both visual (flashing display) and audible (beeping). Likewise, alarm settings can be set up and events triggered in LogWare III. The 1621A-H is also equipped with a 0 to 12 volt alarm output that can trigger a process control system.

A backup battery shuts down the 1621A-H's display but maintains measurements for up to 16 hours in the event of a power failure.

One very cool display

Want to view data from across the room? Want to view data from two temperature and two humidity inputs simultaneously? Want to view data graphically, statistically, or both? At the same time? The DewK does everything a user could want: up to sixteen different display setups can be stored and recalled at the touch of a single button; and all 16 can be easily modified.

LogWare III

If users really want to get the most out of their 1621A-H, LogWare III is an investment worth every penny. As client-server or stand-alone software, it remotely monitors and logs an unlimited number of concurrent log sessions into a single database. That means data from many DewKs can be managed in real time via Ethernet, RS-232, or wireless connections.

LogWare III allows users to customize their graph trace colors, alarms, and statistics as they go. Users can start/stop log sessions and modify sample intervals from their computer. LogWare III supports "hot-swapping," which allows users to remove and replace sensors without shutting down the log session. LogWare III also supports security features such as passwords for individual users or groups/teams, a built-in administrator account, pre-defined user groups, and customizable permissions.

Never again be the last to know about a problem. Customizable email settings allow users to send emails to designated recipients, including cell phones and PDA's, when a log session begins, ends, or is aborted; when the 1621A-H's battery is low; when a sensor calibration is due; or when a temperature/humidity alarm is exceeded.

If a user cannot be reached via email, that can always arrange to be paged instead. Data stored on the 1621A-H can be imported into the software, which is a handy feature when power outages disable the network.

Historical data can be viewed by sensor (model/serial number) location, or log session and displayed in a spreadsheet style grid. Logged data can also be exported to HTML, RTF or ASCII text for use in analytical software, or simply print historical data and graphics.

Customizable graphs in LogWare III with zooming capability are an easy way to analyze data history, and data points that need to be explained can be highlighted, annotated, and referred to later. LogWare III statistics include min, max, spread, average, and standard deviation functions, and printed reports keep track of the number of temperature and humidity measurements that were found to be out of tolerance.