TB 9-6625-2264-24
8. Light Level Accuracy
NOTE
If the night vision device detector standard is exposed to
overload light conditions, several minutes are needed in low
light level conditions for the night vision device detector
standard to recover.
a. Performance Check
(1) Connect multimeter Input HI and LO to night vision device detector standard
BNC CONNECTOR (fig. 1).
(2) Install night vision device detector standard into TI RIGHT TEST PORT
(3) Turn night vision device detector standard power ON/OFF SWITCH (fig. 1) to
ON and allow night vision detector standard to warm-up 5 minutes and record multimeter
indication.
NOTE
Multimeter must not be in autoranging.
(4) Set TI ON-OFF-POWER CHECK switch to ON and rotate selector switch to
LOW LIGHT LEVEL RESOLUTION.
(5) Pull TI ANVIS/NVG GOGGLE SWITCH (fig. 2) to NVG (up) position. If
multimeter does not indicate between 3.04 and 5.90 mV dc after algebraically subtracting
indication recorded in (3) above, perform b (1), (2), and (4) below.
(6) Push TI ANVIS/NVG GOGGLE SWITCH (fig. 2) to ANVIS (down) position. If
multimeter does not indicate between 0.82 and 1.60 mV dc after algebraically subtracting
indication recorded in (3) above, perform b (1), (3), and (4) below.
(7) Remove lens cap/target from TI Left Test Port (fig. 1) and remove night vision
device detector standard from RIGHT TEST PORT (fig. 1) and install in TI LEFT TEST
(8) Repeat (5) and (6) above.
(9) Rotate TI selector switch to SELF TEST. GO (green) light will illuminate.
(10) Rotate TI selector switch to HIGHLIGHT LEVEL RESOLUTION.
(11) Pull TI ANVIS/NVG GOGGLE SWITCH (fig. 2) to NVG (up) position.
Multimeter will indicate between 0.570 and 1.710 V dc.
(12) Push TI ANVIS/NVG GOGGLE SWITCH (fig. 2) to ANVIS (down) position.
Multimeter will indicate between 0.155 and 0.464 V dc.
(13) Remove lens cap/target from TI RIGHT TEST PORT (fig. 1) and remove night
vision device detector standard from LEFT TEST PORT (fig. 1) and install in TI RIGHT
(14) Repeat (11) and (12) above.