1620A High Accuracy Temperature and Humidity Logger

Two types of sensors can be used.

The high accuracy sensor ("H" model) is accurate to ± 0.125 °C over a calibration range of 16 °C to 24 °C. The relative humidity is accurate to ± 1.5 % RH over a range of 20 % RH to 70 % RH. Relative humidity is accurate to ± 1.5 % RH over a range of 20 % RH to 70 % RH.

The standard accuracy sensor ("S" model) is accurate to ± 0.25 °C over a calibration range of 15 °C to 35 °C. The relative humidity is accurate to ± 2 % RH over a range of 20 % RH to 70 % RH. Relative humidity is accurate to ± 2 % RH over a range of 20 % RH to 70 % RH.

All 1620 sensors come with NVLAP-approved temperature and humidity calibration certificates, complete data and NIST traceability.

Ethernet and wireless connectivity

Using the built-in Ethernet RJ45 socket, you can monitor multiple 1620s on a single screen using the LogWare III client-server software, and the Ethernet connection allows you to connect remotely via the Internet to monitor important data while you're away.

Wiring on the floor is a safety hazard, and pulling cables through ceilings and walls interferes with line of sight. the 1620 simply connects to a computer up to 100 feet away via an RF modem, eliminating the need for messy cables.

If you need a printout, you can send the data to the printer in real time via the RS-232 interface.

Arithmetic and statistical functions

In addition to temperature and humidity, the 1620 can calculate dew point, thermal index, and rate of change of temperature and humidity. It displays the minimum and maximum values of measurements on the screen, as well as a variety of other calculated statistics. Daily statistics for the last 60 days can be stored in the instrument, including minimum, maximum and maximum rates of change.

Calibrated sensors

One 1620 can monitor two locations simultaneously, with both sensor inputs measuring temperature and relative humidity. Both sensors can be mounted as far as 100 feet away with extension cables, or one sensor can be mounted directly on top of the 1620.

Each sensor has been calibrated for temperature and humidity by Fluke's Metrology Calibration Department. The sensor's calibration constants are stored in the sensor's internal memory chip, so the sensor can be used with a different 1620 and no 1620 is required to recalibrate the sensor.

Sensors can also be assigned a unique identifier (16 characters) to match the sensor identifier to the data collected for better record keeping. One sensor is included with each 1620, and additional sensors are available from Fluke's Metrology and Calibration Department. Spare sensors can be purchased as a kit that includes a sensor box, a wall mounting bracket, and a 25-foot extension cable.

The 1620 Hygrometer and Humidity Detector has enough on-board memory to store up to 400,000 time and date stamped data points. This means that if two sensors take a measurement every 10 minutes, the memory can store up to two years of measurement data!

Alarm and battery backup

The 1620 can be quickly configured with alarm settings based on conditions such as temperature, rate of change of temperature, relative humidity, rate of change of relative humidity, and fault conditions of the instrument. Alarms can be visual (display flashing) or audible (beeping). Again, alarm setup and event triggering can be accomplished in LogWare III. The 1620 also provides a 0 to 12 V alarm output signal that can trigger the process control system.

In the event of a power failure, the 1620 will use the backup battery, turn off the display and continue to measure for 16 hours.

Large, easy-to-read display

Want to view data from the other end of the room? Want to view data from two temperature and two humidity inputs at the same time? Want to view data graphically? Want to view data statistically, or in both formats? If you need to do everything at once, the 1620 Hygrothermometer and Humidity Detector can do it all, or at least everything we can think of. Users can set up and save up to 16 different display formats, which can be recalled at the touch of a button. All 16 settings can be easily modified to get exactly the data you want.