Lake Shore Cryotronics 121, Руководство пользователя

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Chapter 6: Service
6.1 General
This chapter provides basic service information for the Model 121 cur-
rent source. Customer service of the product is limited to the informa-
tion presented in this chapter. Factory trained service personnel should
be consulted if the instrument requires repair.
6.2 USB Troubleshooting
This section provides USB interface troubleshooting for issues that arise
with new installations, existing installations, and intermittent lockups.
6.2.1 New Installation
1. Check that the instruments interface is set to USB.
2. Check that the USB driver is installed properly and that the device is
functioning. In Microsoft Windows®, the device status can be
checked using Device Manager by right-clicking
Lake Shore Model
121 Current Source under Ports (COM & LPT) or Other Devices and
then clicking Properties . Refer to section 4.2.3 for details on install-
ing the USB driver.
3. Check that the correct com port is being used. In Microsoft Win-
dows®, the com port number can be checked using Device Manager
under
Ports (COM & LPT).
4. Check that the correct settings are being used for communication.
Refer to section 4.2.3 for details on installing the USB driver.
5. Check cable connections and length.
6. Send the message terminator.
7. Send the entire message string at one time including the terminator.
(Many terminal emulation programs do not.)
8. Send only one simple command at a time until communication is
established.
9. Be sure to spell commands correctly and use proper syntax.