TSI Instruments DustTrak 8520, Operation And Service Manual

Page: 59 / 89

49
Appendix A
Specifications
Specifications are subject to change without notice.
Sensitivity:
Sensor type: ..................... 90
°
light scattering, laser diode
Range: ............................. 0.001–100 mg/m
3
(calibrated to respirable
fraction of standard ISO 12103-1, A1 test
dust)
Resolution: ...................... ±0.1 % of reading or ±0.001 mg/m
3
,
whichever is greater
Zero stability: .................... ±0.001 mg/m
3
over 24 hours using
10-second time-constant
Particle size range: .......... 0.1–approximate 10 µm (Upper limit is
dependent on flow rate)
Flow rate range: ............... 1.4–2.4 L/min.
Temperature coefficient: .. +0.001 mg/m
3
per
°
C (for variations from
temperature at which D
UST
T
RAK
monitor
was zeroed)
Instrument Temperature Range:
Operating range: ............. 0
°
C to 50
°
C (32
°
F to 120
°
F)
Storage range: ................ -20
°
C to 60
°
C (-4
°
F to 140
°
F)
Time Constant:
Range: .............................. Adjustable from 1 to 60 seconds
Data Logging:
Data points: ...................... >31,000 (21 days logging every minute)
Logging interval: ............... Adjustable from 1 second to 1 hour
Analog Output (selected instruments only):
Selectable ranges: ........... 0 – 0.100 mg/m
3
0 – 1.0 mg/m
3
0 – 10.0 mg/m
3
0 – 100 mg/m
3
Voltage output .................. 0 – 5 VDC
Output impedance ............ 0.01 ohms
Maximum current ............. 15 mA