Sample code (TEM3)¶

This page presents a simple sample code using the TEM3 package.

The functions to be introduced are as follows

Get a list of detectors that can be controlled
Get or set a detector information
Image capturing

Prerequisites

TEMCenter is running (in the case of online)
TEMServer is running (in the case of online)
Ver.1.3.0 (Operation check environment)

0. Import TEM3¶

[1]:

# online
from PyJEM import TEM3
TEM3.connect()

## offline
#from PyJEM,offline import TEM3
#TEM3.connect()

1. Get current mag value¶

Use GetMagValue() function in EOS class to get the value.

1.1. Create EOS instance¶

[2]:

eos = TEM3.EOS3()

1.2. Call GetMagValue method¶

[3]:

eos.GetMagValue()

[3]:

[200, 'X', 'X200']

2. Change the magnification¶

The magnification can be changed with SetSelector() defined in TEM3.EOS3().
- SetSelector () has one argument and will be changed to a magnification according to the entered value.
- The input value is 0 to 40 in index.
The Set function has no return value. You can check the changed magnification with GetMagValue ().

2.1. Call a SetSelector method¶

change to 1 (index) mag value.

[19]:

eos.SetSelector(1)

2.2. Check TEM state¶

[6]:

eos.GetMagValue()

[6]:

[250, 'X', 'X250']

3. Increase the magnification by some step¶

10 steps from the current magnification using the for statement

Use “for” statement
```
>>> for i in range(10):
```
Use function UpSelector() to increase the magnification one step at a time.

3.1. Execute¶

[20]:

for i in range(10):
    eos.UpSelector()
    print(eos.GetMagValue())

[300, 'X', 'X300']
[400, 'X', 'X400']
[500, 'X', 'X500']
[600, 'X', 'X600']
[800, 'X', 'X800']
[1000, 'X', 'X1000']
[1200, 'X', 'X1200']
[1500, 'X', 'X1500']
[2000, 'X', 'X2000']
[2500, 'X', 'X2500']