Downloads:
|
| CO2 |
|
| Sensor type |
Non-Dispersive Infrared (NDIR) |
| Range |
0-5000 ppm |
| Accuracy |
±3% of reading ±50 ppm at 25°C (77°F). (add uncertainty of ±0.36% per °C (±0.2% of reading per °F) for change in temperature) |
| Resolution |
1 ppm |
| Response time |
20 seconds (for 63% of final value For 500 ppm step change) |
| |
|
| TEMPERATURE |
|
| Sensor type |
Thermistor |
| Range |
0 to 50°C (32 to 122°F) |
| Accuracy |
±0.6°C (1.0°F) |
| Resolution |
0.1°C (0.1°F) |
| Response time |
120 seconds (for 63% of final value) |
| Display units |
°C or °F (user selectable) |
| |
|
| HUMIDITY |
|
| Sensor type |
Thin-film capacitive |
| Range |
5 to 95%rh |
| Accuracy |
±3%rh (Includes ±1% hysteresis.) |
| Resolution |
0.1%rh |
| Response time |
20 seconds (for 63% of final value) |
| |
|
| CO (Model 8551 only) |
|
| Sensor type |
Electro-chemical |
| Range |
0-500 ppm |
| Accuracy |
±3% of reading or 3 ppm whichever is greater (add ±0.5%/°C (0.28%/°F) away from calibration temperature) |
| Resolution |
1 ppm |
| Repeatability |
±2% of reading |
| Response time |
<60 seconds to 90% of final value |
| |
|
| INSTRUMENT TEMPERATURE RANGE |
| Operating range |
5 to 45°C (41 to 113°F) |
| Storage range |
-20 to 60°C (-4 to 140°F) |
| |
|
| TIME CONSTANT |
|
| Range |
Adjustable from 2 to 60 seconds |
| |
|
| DATA LOGGING |
|
| Data points |
63,000 (14 days of logging simultaneous CO2, Temperature, and Humidity at 1-minute intervals) |
| Logging interval |
User adjustable from 1 second to 1 hour |
| |
|
| POWER REQUIREMENTS |
|
| Batteries |
Four AA-size Alkaline or NiCd |
| AC adapter |
6 VDC nominal, 300 ma, (Q-TRAK mates with 5.5 mm OD x 2.1 mm ID plug, center pin positive(+)) |
| Approx. battery Life |
13.5 hours (Alkaline), 4.75 hours (NiCd) |
| |
|
| PHYSICAL |
|
| External dimensions |
107 mm x 183 mm x 38 mm
(4.2 in x 7.2 in x 1.5 in) |
| Probe length |
Model 8551: 16.5 cm (6.5 in)
Model 8550: 13.5 cm (5.375 in) |
| Probe diameter |
1.9 cm (0.75 in) |
| Weight |
0.59 kg (1.3 pounds)(with batteries) |
| Display |
4-digit LCD, 15 mm (0.6 in) digit Height |
| |
|
| MAINTENNCE SCHEDULE |
|
| Factory calibration |
Annually |
| User calibration |
Before each rental |
| |
|
| SERIAL INTERFACE |
|
| Type |
RS-232 |
| BAUD rate |
1200 |
| Data bits |
8 |
| Stop bits |
1 |
| Handshaking |
None |
| Data format |
ASCII |
