Instrument Status - MAGEE Scientific Aethalometer AE33 User Manual

Aethalometer
Model AE33

8.2 Instrument Status

The Instrument Status is shown by a status flag constructed as a 16-bit value composed of
codes for various instrument functions. These include the Detector Status (bits 0,1); Flow (bits
2,3); Optical Source (bits 4,5); Chamber Position (bit 6); Tape Sensors (bits 7,8); Ball Valve (bit
9); Test Procedures (bits 10, 11 and 12); and other functions as shown in the table below.
The overall Status Code Number is the sum of all the decimal values of all of the possible
status flag values.
Status bit
relates to: position
Operation 1 and 0
Flow 3 and 2
Optical 5 and 4
Source
____________________________________________________________________________________________________________
User's manual – Ver. 1.55
status flag description
binary decimal
00 0 Measurement
01 1 Tape advance (tape advance, fast
calibration, warm-up)
10 2 First measurement – obtaining ATN0
11 3 Stopped
00 0 Flow OK
01 4 Flow low/high by more than 0.5 LPM or
F1 < 0 or F2/F1 outside 0.2 – 0.75 range
10 8 Check flow status history
11 12 Flow low/high & check flow status
history
00 0 LEDs OK
01 16 Calibrating LED
10 32 Calibration error (at least one channel
OK)
11 48 LED error (all channels calibration error,
COM error)
July 2017 56/146