DigitalFilter Exponentialwith adjustable time constant (1 to 60 seconds)
RemoteCommunications RS-232serial
Display LCD,6-digit x 7-segment with 16-character alphanumeric
OperatingTemperature Range 0to 40°C (32 to 104°F) absolute
15to 35°C (59 to 95°F) full accuracy
Power 12VDC (AC adapter included)
RechargeableNiMH batteries (included)
Safety OVERVOLTAGE(Installation) CATEGORY II, Pollution Degree 2 per
IEC1010-1refers to the level of Impulse Withstand Voltage protec-
tionprovided. Equipment of OVERVOLTAGE CATEGORY II is en-
ergy-consumingequipment to be supplied from the fixed installation.
Examplesinclude household, office, and laboratory appliances.
Size 7.75"Hx4.2"Wx1.5"D (20 cm H x 11 cm W x 4 cm D)
Weight 0.4 kg (1.0 lb.)
†
Accuracyspecifications apply from 15 to 35°C. Accuracy specifications over the entire absolute operating
rangeare 1.5 times the stated values. Temperature accuracy does not include probe uncertainty or probe
characterizationerrors. The practical measurement range may be limited by the sensor.
3.2 Environmental Conditions
Although the instrumenthas been designed for optimum durability and trou-
ble-freeoperation, it must be handled with care. The instrument should not be
operated inan excessively dusty, dirty, or wet environment.Maintenance and
cleaning recommendationscan be found in the Maintenance section of this
manual.
Forfull accuracy, operate the instrument in ambient temperatures between
15-35°C (59-95°F). Do not operate the instrumentin an environmentcolder
than 5°C (41°F) or warmerthan 50°C (122°F).
The instrument operates safely under thefollowing conditions:
•Operating temperature range: absolute 5–50°C (41–122°F);
full accuracy15-35°C (59-95°F)
•ambient relative humidity: maximum 80% for temperature <31°C, de-
creasing linearly to 50% at 40°C
•Pressure: 75kPa-106kPa
•Vibration should be minimized
•Altitude less than 2,000 meters
•Indoor use only
1521 Handheld Thermometer Readout
User’s Guide
10