Model 2750 Multimeter/Switch System User’s Manual Rel, Math, Ratio, Channel Average, dB 5-9
mX+b
This math operation lets you manipulate normal display readings (X) mathematically
according to the following calculation.
Y = mX + b
where: X is the normal display reading.
m and b are the user-entered constants for scale factor and offset.
Y is the displayed result.
NOTE When using Rel, the rel’ed reading of the input signal is used by the mX+b
calculation.
mX+b configuration
1. Press SHIFT and then MATH to display the math menu.
2. Press the RANGE
Δ and ∇ key to display “mX+b”, and press ENTER to display
the present scale factor:
M: +1.000000
Δ (factory default)
3. Key in the scale factor value. The and keys control cursor position, and the
Δ
and
∇ keys increment/decrement the digit value. To change range, place the cursor
on the multiplier and use the
Δ and ∇ keys (m = × 0.001, Δ = × 1, K = × 1000,
and M = × 1,000,000). With the cursor on the polarity sign, the
Δ and ∇ keys tog-
gle polarity.
4. Press ENTER to enter the M value and display the offset (b) value:
b: +00.00000 m (factory default)
5. Key in the offset value.
6. Press ENTER to enter the b value and display the one-character units designator:
UNITS: X (factory default)
7. Use the cursor keys and the
Δ or ∇ key if you wish to change the units designator.
The character can be any letter in the alphabet (A through Z), the degree symbol
(°), or the ohms symbol (Ω).
8. Press ENTER. The MATH annunciator will turn on, and the result of the calcula-
tion will be displayed. Note that the calculation will be applied to all measurement
functions.
9. To disable mX+b, again press SHIFT and then MATH. The MATH annunciator
will turn off.
2750-900-01.book Page 9 Wednesday, August 3, 2011 7:56 AM
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