Escene ES310 Bedienungsanleitung PDF herunterladen (Seite 28)

3.10

Setting Exposure Time

EXPOSURE

This command sets the camera exposure time. Enter an exposure time value

between 94 microseconds, and about (1/frame rate), in milliseconds, when you

are in continuous mode. The maximum exposure time is 96 milliseconds in

trigger and retrigger modes. The camera picks a valid exposure time closest to

the value you entered. The exposure time setting is not valid in control mode.

The exposure time range is affected by the alternate row and block mode settings.

Type In Response Explanation

EXE xx.xxx CR-LF Sets the exposure time in milliseconds

EXE? Queries the current exposure setting.

EXE xx.xxx Where xx.xxx is the exposure time expressed in

milliseconds.

AUTO EXPOSE SELECT

The camera adjusts its exposure time to hold a user set video level as scene

illumination changes. The camera takes a digital video sample within an expo-

sure window. The exposure window is a 128 pixels wide by 256 rows high. The

user can set the location of the exposure window or accept the default location

near the center of the image. The average amplitude of the video in the exposure

window is then used to control the exposure time.

Type In Response Explanation

AEX ON CR-LF Turns auto expose on, holding the video in the

exposure window to the value selected by the SET

command.

AEX OF CR-LF Turns auto expose off.

AEX CAL CR-LF The camera checks the video level within the expo-

sure window, and then turns on the auto exposure

function to maintain that video level, rather than

using the level selected by the SET command.

AEX? Queries the auto expose status.

AEX x Means that auto expose is set to x.

NOTE

When you are using alternate row and/or block readout modes avoid having black

pixels fall inside the exposure window. Black areas inside the exposure window

will cause errors in the auto exposure process. Adjust the block start and stop

values or the exposure window position so that only valid video data is sampled

for the auto exposure function.

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Escene ES310 Bedienungsanleitung Seite 28