Lake Shore Model 421 Gaussmeter User’s Manual
C-8 Hall Generator
C6.0 HALLCAL.EXE PROGRAM
The HALLCAL.EXE program was developed by Lake Shore Cryotronics, Inc. to allow the interfacing of
customer attached Hall generators to the Model 421 Gaussmeter. (Please refer to the Software License
Agreement behind the title page of this manual.) This program is provided with the purchase of a Model
MCBL-6 or -20 Cable Assembly. Because of the many intricacies involved with proper calibration, the
Customer must accept responsibility for the measurement accuracy.
Requirements:
• Lake Shore Model 421 Gaussmeter (connected via RS-232 to the computer in the COM1 port).
• Lake Shore Model MCBL-6 or -20 Cable Assembly.
• IBM or compatible CPU.
• Hall generator meeting the sensitivity ranges given below.
• Calibration or sensitivity constant and serial number of the Hall generator.
1. Set the Lake Shore Model 421 Gaussmeter to 300 Baud. Refer Paragraph 3.11 of this User’s Manual on
how to set the Gaussmeter to communicate at 300 Baud.
2. Insert the 3.5-inch disk and type in the default drive (A: or B:).
3. Type in HALLCAL. This will execute the HALLCAL.EXE program.
4. The program will prompt for the Probe serial number. Any combination of 6 letters or number can be
entered. Press Enter when this is accomplished.
5. The program will prompt for the probe type (0 or 1).
Enter “0” for Hall generators with sensitivities between 5.5 and 10.5 mV/kG (@ 100 mA current).
Enter “1” for Hall generators with sensitivities between 0.55 and 1.05 mV/kG (@ 100 mA current).
6. The program will prompt for the “Calibration Constant.” Enter the magnetic sensitivity in mV/kG at a
control current of 100 mA. Remember to account for the 420 Ω input impedance of the Gaussmeter when
calculating the proper load resistor to install.
7. The program will display all the values entered along with designated F keys:
F1 Probe Serial Number ABC123
F2 Probe Type 0
F3 Calibration Constant X.XXX
F10 Program Probe
Esc Exit Program
8. At this time, if any of the parameters need to be changed, just press the appropriate F key and type in the
new value. When everything appears correct, press F10 to program the probe.
9. It takes about 20 seconds to program the probe. After the probe is programmed, press the Esc key to exit
the program.
SOFTWARE LICENSE AGREEMENT
This software is protected by United States copyright law and international treaty provisions. Lake Shore provides this software package
and grants you (the user of the software) a non-exclusive and non-transferable right to use this software. Unless as provided in this
Agreement, any attempt to sublicense, lease, rent, assign, or transfer this license or this software is void. To maintain software warranty,
the source code must not be modified. Any changes made to the HALLCAL.EXE source code is at the user’s risk. Lake Shore assumes
no responsibility for damage or errors incurred as result of any changes made to the source code.
This agreement allows you to use the HALLCAL.EXE Software on any one computer system. One archival floppy disk is permitted. Any
unauthorized duplication or use of the software in whole or in part, in print, or in any other storage and retrieval system is forbidden.
Lake Shore works to ensure the HALLCAL.EXE Software is as free of errors as possible, and that the results you obtain from the system
are accurate and reliable. However, understand that with any computer software the possibility of software errors exist. In any important
research, as when using any laboratory equipment, results should be carefully examined and rechecked before final conclusions are
drawn. Neither Lake Shore nor anyone else involved in the creation or production of this software can pay for loss of time, inconvenience,
lost of use of the product, or property damage caused by this product or its failure to work, or any other incidental or consequential
damages. Use of our product implies that you understand the Lake Shore license agreement and statement of limited warranty.
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