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Chapter 6: Service
6.1 General
This chapter provides basic service information for the F71/F41 teslameter. Customer
service of the product is limited to the information presented in this chapter.
Lake Shore service personnel should be consulted if the instrument requires repair.
The purpose of this chapter is to help determine if there is a simple solution to your prob-
lem, or if something is out of working order. If you verify that there is something wrong
with your instrument, do not attempt to open the instrument as there are no serviceable
parts inside; contact Lake Shore for service (section 6.9).
6.2 General
Troubleshooting
If the F71/F41 teslameter registers a reading that is not appropriate to the situation,
try the following solutions.
D
Refer to section 6.5 for a list of error messages
D
Cycle the power
D
Reset the instrument to factory defaults (section 3.5.10)
D
To determine whether the issue is with the probe or the instrument, test the
instrument with a different probe, or try disconnecting and reconnecting the
probe
D
If none of these solutions work, contact Lake Shore (section 6.9)
6.3 USB
Troubleshooting
This section provides USB interface troubleshooting for issues that arise with new
installations, existing installations, and intermittent lockups.
6.3.1 New Installation
1. Check that the instrument’s 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 Instrument
under Ports (COM & LPT) or Other
Devices and then clicking Properties. Refer to Chapter 4 for details on installing
the USB driver.
3. Check that the correct com port is being used. In Microsoft Windows®, 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
Chapter 5 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 ter-
minal 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.
6.3.2 Existing
Installation No Longer
Working
1. Power the instrument off, then on again to see if it is a soft failure.
2. Power the computer off, then on again to see if communication port is locked up.
3. Check all cable connections.
4. Check that the com port assignment has not been changed. In
Microsoft Windows®, the com port number can be checked in the Device Manager
window, under the
Ports
(COM & LPT) device type.
5. 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 Instrument
under Ports (COM & LPT) or Other
Devices and then clicking Properties.
