598220

Keithley 2001 Manual

59
Zoom out
Zoom in
Previous page
1/476
Next page
Front Panel Operation
2001-900-01 Rev. K/ August 2010 3-27
Crest factor: The crest factor of a waveform is the ratio of
its peak value to its RMS value. Thus, the crest factor
specifies the dynamic range of a true RMS instrument. For
sinusoidal waveforms, the crest factor is 1.414. For a
symmetrical square wave, the crest factor is unity. The crest
factor of a rectangular pulse is related to its duty cycle; as the
duty cycle decreases, the crest factor increases.
For the Model 2001, the additional error term for RMS
measurements caused by a high crest factor is specified up to
a value of five. The maximum displayable value is 9.99, or
else it shows “over”.
Note that the crest factor is not calculated if dB or dBm is the
presently selected units.
Low level considerations
For sensitive measurements, external considerations besides
the Model 2001 affect the accuracy. Effects not noticeable
when working with higher voltages are significant in
microvolt signals. The Model 2001 reads only the signal
received at its input; therefore, it is important that this signal
be properly transmitted from the source. The following
paragraphs indicate factors that affect accuracy, including
thermal offsets and stray pick-up.
Shielding: AC voltages that are extremely large compared
with the DC signal to be measured may produce an
erroneous output. Therefore, to minimize AC interference,
the circuit should be shielded with the shield connected to
the Model 2001 INPUT LO (particularly for low-level
sources). Improper shielding can cause the Model 2001 to
behave in one or more of the following ways:
• Unexpected offset voltages.
• Inconsistent readings between ranges.
• Sudden shifts in reading.
To minimize pick-up, keep the voltage source and the Model
2001 away from strong AC magnetic sources. The voltage
induced due to magnetic flux is proportional to the area of
the loop formed by the input leads. Therefore, minimize the
… 59 …


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Keithley 2001 at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Keithley 2001 in the language / languages: English as an attachment in your email.

The manual is 2,31 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info