PerkinElmer STA 8000, Installation And Hardware Manual

Page: 51 / 64

Install an STA 8000 . 51
Calibration of the STA 8000
The STA 8000 has been calibrated at the factory for both temperature and heat flow. As a
result of the use of high-precision sensors, the temperature accuracy does not vary over the
temperature range and remains constant for long periods of time. Under normal conditions,
the only calibrations required at installation are the weight calibration and baseline
optimization. The weight calibration should also be performed if the analyzer is physically
moved, and the baseline optimization should be repeated whenever there is a substantial
change in chiller temperature or purge gas flow rate, or when the sensor is replaced.
We do recommend that the temperature and heat flow calibrations are verified using the
samples of indium and gold (which are provided in the Spares and Accessory Kit) before
obtaining data. When installing a new analyzer, carry out these steps in order:
1. Weight Calibration and Verification
2. DTA Baseline Optimization
3. Temperature Verification
4. Heat Flow Verification
For general guidance on loading samples into the analyzer, see
Sample Handling
on page 57.
Weight Calibration
1. Once all the system components are installed and the system purge and coolant flow
have been turned on, leave the instrument for 4–8 hours to fully equilibrate and
stabilize the balance to the laboratory environment.
2. Place a ceramic pan on each platform of the sensor.
3. Open the calibration routine and click
Start Calibration
.
4. Enter the value of the calibration weight.
Use a Class '0' 100 mg weight or the weight provided with the STA 8000.
5. Click
Run Calibration
and follow the instructions on the screen.
6. At the end of the calibration, save and close the calibration.
7. Remove the weight.
Weight Verification
1. After the balance has stabilized and the weight has been calibrated, tare an empty pan,
place the calibration reference weight provided into the sample pan and record the
weight displayed in the status panel.
2. Verify that the weight reading is in good agreement with the certified value of the
calibration reference weight.