Rel Function; Measuring Point Illumination - VOLTCRAFT 1665555 Bedienungsanleitung

d) REL function
Use the REL function to conduct relative value measurements to prevent line losses during
resistance measurement, for instance. The function sets the current display value to zero
(zeroing). A new reference value is now set. The smaller upper display shows the basic value
(relative difference).
Push the REL key (11) to activate this measuring function and save the reference value. The
display shows "REL". Push the REL key (11) again to display the saved difference value with the
delta symbol "Δ" in the small upper line.
The main display is zeroed and automatic range selection is deactivated.
To turn off this function, push the REL key again or switch to a different measuring function.
The REL function is not available in the measuring ranges A-DC, continuity
check, diode test and NCV.
e) Measuring point illumination
The illumination key (14) located on the side of the DMM can be used to activate/deactivate
measuring point illumination when the device is on. Push the key once to turn illumination on and
twice to turn it back off. A confirmation beep sounds each time the key is pressed.
The illumination remains on until the function is deactivated using the illumination key (14), the
rotary switch (to "OFF") or automatic power-off.
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