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6 Operation | 6.5 Finding Appropriate Detector Settings
ZEISS
6.5.4 Setting up the VPSE Detector
The VPSE detector is designed for VP applications. The VP mode enables analyzing and imaging of
non-conducting, strongly gassing or moist specimens without any need for specimen preparation.
Fig. 32: A rosemary leaf.
The following settings are recommended for the VPSE detector:
Typical WD
Collector bias voltage
1 kV - 30 kV
7 - 10 mm
§
Adjustable from 0 to +1 kV.
§
The optimum value depends on the pres-
sure in the specimen chamber.
Prerequisite
ü
The microscope is operating in VP vacuum mode
1. In the Crossbeam SEM Control panel, select the Imaging tab.
2. From the
Signal A
drop-down list, select
VPSE
.
3. Adjust the EHT and the working distance (WD) according to the suggestions in the table.
à
First adjust the collector bias voltage until the image appears white.
à
Then slightly reduce the collector bias voltage to optimize the image.
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Instruction Manual ZEISS Crossbeam 350 | en-US | Rev. 3 | 349500-8111-000