Model 2700 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 toggle
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
calculation 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.
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