Technical Information
|
External Event Input
|
| Event Sensor |
Two-wire interface suitable for measuring mechanical and electrical contact
closures |
| Maximum Input Frequency |
1 Hz (1 pulse per second) |
| Lockout Time |
500 ms |
| Minimum Pulse Width |
1 ms (hardware debounce) |
| Input/Output Impedance |
100 kΩ |
| Edge Detection |
Falling edge, contact closure, or Schmitt-trigger buffer |
| Preferred Switch Type |
Normally open. For maximum battery life, the event input should be used
with its preferred switch type. The logger will work with normally closed
switches, but battery life will be compromised. |
| Open Circuit Input Voltage |
Battery voltage; nominally 3.0 V |
| Maximum Input Voltage |
Battery voltage + 0.3 V |
| User Connection |
24 AWG, 2 leads: white (+), black (-) |
Temperature Measurement
|
| Measurement Range |
-20° to 70°C (-4° to 158°F) |
| Accuracy |
±0.53°C from 0° to 50°C (±0.95°F from 32° to 122°F), see Plot A. A solar
radiation shield is required for accurate temperature measurements in
sunlight. |
| Resolution |
0.14°C at 25°C (0.25°F at 77°F), see Plot A in Manual |
| Drift |
Less than 0.1°C/year (0.2°F/year) |
| Response Time |
Airflow of 2 m/s (4.4 mph): 10 minutes, typical to 90% |
Logger
|
| Time Accuracy |
±1 minute per month at 25°C (77°F), see Plot B in Manual |
| Operating Range |
-20° to 70°C (-4° to 158°F) |
| Environmental Rating |
Tested to NEMA 6 and IP67; suitable for deployment outdoors |
| Drop Specification |
1.5 m (5 ft) onto concrete |
| NIST Traceable Certification |
Available for temperature only at additional charge; temperature range
-20° to 70°C (-4° to 158°F) |
| Battery |
CR-2032 3V lithium battery; 1 year typical use |
| Memory |
64K bytes; see Data Storage. |
| Materials |
Polypropylene case; stainless steel screws; Buna-N o-ring; PVC cable
insulation |
| Weight |
50 g (1.7 oz.) |
| Dimensions |
71 x 33 x 23 mm (2.8 x 1.3 x 0.9 inches); 1.8 m (6 ft) cable |
| The CE Marking identifies this product as complying with all relevant directives in the European Union (EU). |
