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Response time
The filter parameters have speed and accuracy tradeoffs for the time needed to display,
store, or output a filtered reading. These affect the number of reading conversions for speed
versus accuracy and response to input signal changes.
Relative
The rel (relative) function can be used to null offsets or subtract a baseline reading from
present and future readings. When rel is enabled, the instrument uses the present reading
as a relative value. Subsequent readings will be the difference between the actual input val-
ue and the rel value.
You can define a rel value for each function. Once a rel value is established for a mea-
surement function, the value is the same for all ranges. For example, if 50V is set as a rel
value on the 100V range, the rel is also 50V on the 1000V, 10V, 1V, and 100mV ranges.
Thus, when you perform a zero correction for DCV, Ω2, and Ω4 measurements by en-
abling REL, the displayed offset becomes the reference value. Subtracting the offset from
the actual input zeroes the display, as follows:
Actual Input – Reference = Displayed Reading
A rel value can be as large as the highest range.
Selecting a range that cannot accommodate the rel value does not cause an overflow
condition, but it also does not increase the maximum allowable input for that range. For ex-
ample, on the 10V range, the Model 2000 still overflows for a 12V input.
To set a rel (relative) value, press REL key when the display shows the value you want
as the relative value. The REL annunciator turns on. Pressing REL a second time disables
rel.
You can input a REL value manually using the mX+b function. Set M for 1 and B for any
value you want. Pressing REL enables that value to be the relative value. See Section 2 for
more information on the mX+b function.
Digits
The display resolution of a Model 2000 reading depends on the DIGITS setting. It has no
effect on the remote reading format. The number of displayed digits does not affect accuracy
or speed. Those parameters are controlled by the RATE setting.
Perform the following steps to set digits for a measurement function:
1. Press the desired function.
Press the DIGITS key until the desired number of digits is displayed (3½ to 6½).
NOTE Frequency and period can be displayed with four to seven digits.
2000-900 (J - Aug 2010) BOOK.fm Page 5 Wednesday, October 12, 2011 12:29 PM
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