Led Description; Lock-In; General; Characteristics - FLIR X6520sc Series User Manual

8 Radiometric measurement
Name
Protection
Connector type

8.8.3 LED description

LED status
Off
Green
range
Blinking green
Blinkingorange

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 X6520sc 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
Amplitude
Frequency
Maximum signal offset sweep rate
Impedance
Protection
Connector type
#T810207; r. AA/43061/43086; en-US
Value
Voltage peaks (500 V/<1 ns)
Overvoltage (15 V)
Reversed polarity
Coaxial BNC jack
Description
No signal detected. Check the connection and
signal levels.
Signal detected and the signal voltage is correct
but the signal is continuous.
Signal detected.
Signal voltage is incorrect.
Signal detected.
LED is blinking at the signal frequency.
Signal voltage is correct.
Signal detected.
LED is blinking at the signal frequency.
Signal voltage is incorrect.
Value
150 mV < V < 10 V
lock-in
10 mHz < F < 6 kHz
lockin
Half-amplitude per period
High Z
Peak voltage 500 V
Clamping voltage 150 V
Rated voltage 24 V
Electrostatic discharge (ESD) contact 8 kV
ESD air 15 kV
Coaxial BNC jack
44