User Manual

20 GMC-I Messtechnik GmbH
Control Functions
➭ Briefly press the ZERO | ESC key.
The instrument acknowledges storage of the reference value
with an acoustic signal, and the “ZERO REL” or the “REL”
symbol appears at the LCD. The value measured at the
moment the key is pressed serves as a reference value.
➭ The reference value can be cleared by once again pressing the
ZERO | ESC key.
Notes Regarding Relative Measurement
• Relative measurement effects the digital display only. The
analog display continues to read out the original measured
value.
• In the case of relative measurement,  F or AC quantities may
also appear as negative values.
4.3 Display (LCD)
4.3.1 Digital Display
Measured Value, Unit of Measure, Type of Current, Polarity
The measured value with decimal and plus or minus sign appears
at the digital display. The selected unit of measure and current
type are displayed as well. A minus sign appears to the left of the
value during the measurement of zero-frequency quantities, if the
plus pole of the measured quantity is applied to the “” input.
The “0.d iSP” parameter can be used to determine whether lead-
ing zeros will be appear or be suppressed at the measured value
display (see chapter 6.4).
Overranging
If the upper range limit of 3100 digits is exceeded “0L” (overload)
appears at the display.
Exceptions: “0L” appears at the display as of 1000.0 V in the case
of voltage measurement in the 1000 V range, as of 5.100 V for
diode testing, and as of 11.00 A in the 10 A range.