Teledyne 633 user manual User and Communications Interfaces

Teledyne Advanced Pollution Instrumentation Model 633 Aethalometer® Black Carbon Monitor User Manual

2500
				1 second time-base
2000				30 per. Mov. Avg. (1 second time-
				base)
1500
			Point-to-point variation @ 1 second:
1000					126 ng/m3
	131 ng/m3								119 ng/m3
500
0
	14:35:00	14:40:00	14:45:00		14:50:00	14:55:00	15:00:00	15:05:00		15:10:00
14:30:00

-500

Figure 4. ‘Zero­air’ check – the Model 633 Aethalometer switches from sampling ambient air to filtered

air – 1 second time resolution point­to­point variation is very stable.

The response of the optical detectors of the Model 633 Aethalometer may be verified using a standard kit of Neutral Density optical filters. These are glass elements with a range of known and stable optical absorptions, from light to dark, which are traceable from manufacturing records back to primary standards. When these are inserted into the Model 633 Aethalometer, its photodetectors will give a certain output signal. The stability and reproducibility of the relationship between optical signal and ND Filter density from one validation test to another; and the comparison with the original factory values; is a measure of the consistency of performance of the instrument’s optics.

1.1.3 User and Communications Interfaces

The Model 633 Aethalometer incorporates the following user, data and communications features:

•21‐cm (8.25”) color graphics touch‐screen for data display and local user interface;

•USB ports for insertion of a memory stick for local data download;

•USB ports for connection of a keyboard, if necessary for initial setup of parameters, such as station identification;

•RS‐232 COM ports for data transmission from auxiliary instruments or to the digital datalogger;

(Ethernet port installed for future software implementation).

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