What does this multimeter tempco spec mean?
No, &quot;coefficient&quot; means factor by which temperature change is multiplied.
I.E., using the 100,000 mV range at full scale (0.1V), a change from 0°C to 18°C. a 18°C rise, could change reading by as much as 18 x 0.0005% = 0.009% (ignoring the additional error allowance of 0.0005) x 200,000 mV [% reading + % range] = 0.0018 V. (Hoepfully, I've kept track of the decimal place... verification is left to the student ;-)