User Manual

6 GMC-I Messtechnik GmbH
3.4 Relative Measurement REL
A reference value for relative measurements can be stored to
memory with the keys MAN / AUTO and HOLD.
The applicable reference or correction value is substracted
individually for the respective measuring function as an offset
from all subsequent measurements, and remains in memory
until deleted, or until the multimeter is switched off.
Reference value setting is only possible for the respective
manually selected measuring range.
Setting the Reference Value
Plug the measuring cable into the instrument and
measure a reference value
Press the MAN / AUTO key and then the HOLD key.
The instrument acknowledges storage of the reference
value with an acoustic signal, and the REL symbol
appears at the LCD. The value measured at the
moment the keys are pressed serves as a reference
value.
The reference value can be cleared by once again
pressing the MAN / AUTO and HOLD keys.
Note!
Relative measurement effects the digital display only.
Relative measurement is not active during overflow.
In the case of relative measurement, quantities may
also appear as negative values.
4LCD
4.1 Digital Display
The measured value with decimal and plus or minus sign
appears at the digital display. The selected unit of measure
and the 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. “OL” is displayed if the
upper range limit of 6039 is exceeded (or 1999 in the
range).
The digital display is refreshed twice per second during V, A
and measurements.
4.2 Analog Display
The analog display with simulated pointer and the same
dynamic performance as a moving-coil mechanism is
refreshed 20 times per second during V, A and
measurements. This display is especially advantageous for
observing measured value fluctuation, and for balancing
procedures.
The analog display has its own polarity indicator. If the
measured value exceeds the display range, polarity at the
analog display is switched after approximately 0.7 seconds.
Overranging is indicated by the triangle at the right (> 6039
digits).
4.3 Display Illumination
After the instrument has been switched on, background
illumination can be activated by briefly pressing the
ON / OFF LIGHT key. Illumination is switched back off by once
again pressing the same key, or automatically after
approximately 1 minute.
5 Measured Value Memory “HOLD”
By pressing the HOLD key, the currently displayed
measurement value can be “frozen” in the display, and “Hold”
is simultaneously indicated. Automatic shutdown is
deactivated during this process.
The Hold display is deactivated if:
•the HOLD key is pressed and held
•the rotary selector switch is activated
•the FUNC multifunction key is pressed for a change of
function, e.g. AC
Hz.
6 Saving Minimum or Maximum Values
“MIN/MAX” Hold
Minimum and maximum measured values applied to the
measuring instrument’s input after the MAX/MIN function has
been activated, can be “frozen” at the display with the MAX/
MIN function. The most important use of this function is the
determination of minimum or maximum values during long-
term measured quantity observation.
Select the measurement function with the
rotary selector switch and, if appropriate, with the FUNC
multifunction key.
Connect the device under test as described in the
following measurement instructions.
Press the HOLD key twice.
MAX is displayed. The measuring instrument continually
updates and digitally displays the largest occurring
measured value.
Press the HOLD key.
MIN is displayed. The measuring instrument continually
updates and digitally displays the lowest occurring
measured value. Pressing HOLD once more switches this
function back to MAX.
Press and hold the HOLD key for approx. 2 seconds, to
quit the HOLD function.
* range selection is not provided for with MAN + MIN / MAX
MAX MIN
MAN / AUTO *
HOLDHOLD x 2
HOLD long