FLIR X6570sc series, Руководство пользователя

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Radiometric measurement 8
8.8.2 Characteristics
Name Value
Amplitude Rising edge TTL, 0/+5 V
High-state minimum voltage >3.5 V
Low-state maximum voltage <0.5 V
Minimum pulse width One frame period
Impedance User selectable. 50 Ω/10 MΩ
Protection
Voltage peaks (500 V/<1 ns)
Overvoltage (15 V)
Reversed polarity
Connector type Coaxial BNC jack
8.8.3 LED description
LED status Description
Off No signal detected. Check the connection and
signal levels.
Green Signal detected and the signal voltage is correct
but the signal is continuous.
range
Signal detected.
Signal voltage is incorrect .
Blinking green Signal detected.
LED is blinking at the signal frequency.
Signal voltage is correct .
Blinkingorange Signal detected.
LED is blinking at the signal frequency.
Signal voltage is incorrect .
8.9 Lock-in
8.9.1 General
The lock-in technique is commonly used in thermography to improve the sensitivity of the
camera and to extract from the thermal signal the thermal effects corresponding to an ex-
ternal excitation in the object under evaluation.
The FLIR X6570sc features a lock-in signal input BNC connector on the back panel of
the camera (7 in Figure 5.3
Camera back panel description. , page 11).
The value of the signal is digitalized during the integration of the infrared image and em-
bedded within it. It is then recorded by ResearchIR Max and stored in the sequence file
image headers. Files recorded with ResearchIR Max can subsequently be exploited with
FLIR Thesa software. Contact your FLIR representative for further information.
Note When conducting lock-in experiments it is highly recommended to place a large
non-polarized capacitor (e.g., 1 µF 100 V or 1 µF 63 V) in series with the input.
8.9.2 Characteristics
Name Value
Amplitude 150 mV < V
lock-in
< 10 V
Frequency 10 mHz < F
lockin
< 6 kHz
Maximum signal offset sweep rate Half-amplitude per period
Impedance High Z
#T810204; r. AA/43079/43091; en-US 43