Data Item _em_image_recording.average_exposure_time
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General 
- Item name
- _em_image_recording.average_exposure_time
- Category name
- em_image_recording
- Attribute name
- average_exposure_time
- Required in PDB entries
- no
- Used in current PDB entries
- Yes, in about 2.1 % of entries
Item Description
The average exposure time for each image.
Item Example
2.0
Data Type 
- Data type code
- float
- Data type detail
- float item types are the subset of numbers that are the floating numbers.
- Primitive data type code
- numb
- Regular expression
- -?(([0-9]+)[.]?|([0-9]*[.][0-9]+))([(][0-9]+[)])?([eE][+-]?[0-9]+)?
- Units
- seconds
Allowed Boundary Conditions
| Minimum Value | Maximum Value |
|---|---|
| 0.0 | 240.0 |
Advisory Boundary Conditions
| Minimum Value | Maximum Value |
|---|---|
| 0 | 180 |