Instructions

WARNING: To satisfy FCC RF exposure requirements for mobile trans
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mitting devices, a separation distance of 20 cm or more should be main
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tained between the antenna of this device and persons during device
operation. To ensure compliance, operations at closer than this distance is
not recommended. The antenna used for this transmitter must not be
co-located in conjunction with any other antenna or transmitter.
11.3.3.2 Canada
The transceiver used in the 1620A Thermo-Hygrometer has been certified for
use in Canada, IC certification number IC:4214A-XBEE.
11.3.3.3 Europe
The transceiver used in the 1620A Thermo-Hygrometer conforms to European
Union EMC Directive 89/336/EEC, ETSI EN 301 489-1 and EN 301 489-17;
and R&TTE Directive 1999/5/EC, ETSI EN300 328.
11.4 Frequently Asked Questions
Q. Can the 1620A operate on battery power?
A. No. The 1620A requires AC power to be fully functional. However, it
does utilize a 9V backup battery that runs the data collection in the event of a
power outage. When AC power is interrupted, the display will go blank and an
audible alarm will sound to alert you that the 1620A is running on backup
power. The 1620A will continue to collect data on backup power for approxi-
mately 16 hours. When AC power is restored, the display will come back on
and show a message stating the AC power was interrupted. See Section 6.2
Battery.
Q. Can I swap out sensors in the field?
A. Yes. The sensor's calibration information is stored in the sensor itself.
When you change out the sensor, this information is automatically downloaded
to the 1620. There is no need to reprogram probe coefficients into the 1620.
See 6.12 Sensors.
Q. How many readings can the 1620A store in onboard memory?
A. The 1620A can store 400,000 date- & time-stamped data points.
Q. What happens when memory is full?
A. The oldest block of data is discarded to allow the most recent measurements
to be recorded. See Section 7.3.1 Data Record.
Q. How do I tell how much memory has been used?
A. The memory usage expressed as a percent filled is found in the DATA menu
under DATA RECORD and DATA STORAGE. See Section 7.3.1 Data Record.
Q. How do I get data from the 1620?
1620A “DewK” Thermo-hygrometer
User’s Guide
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