49
Mathematical Functions
Fig. 6.1: Display of statistic values
6 Mathematical
Functions
In addition to the basic functions of the
multimeter, mathematical functions are also
available. These can be accessed by pressing
the MEAS key on the front panel of the instru-
ment. Tab. 6.1 describes which mathematical functions can
be used with which measurement functions.
6.1 Statistic
The soft menu STATS allows the user to activate the stati-
stic functions (Min/Max, Mean, StdDev, Pk to Pk, Count).
Use the soft menu key STATS to activate (ON) or deacti-
vate (OFF) statistic values. The statistic functions will be
displayed below the main measurement value (Main). You
can use the soft menu key #MEAS to determine how many
measurement values are to be included in the statistic. You
can select the number of measurement values via knob
or via numeric keypad (SHIFT key). The statistic may be
performed on a maximum of 50,000 measurement values.
If #MEAS is set to „0“, the statistic will be performed on all
measurement values. If #MEAS is set to „7“, for instance,
the statistic will be performed on 7 measurement values.
The soft menu key RESET resets the statistic. Additionally,
Measurement
function
Mathematic
functions
Stats
Limits
HOLD
NULL
DC V
●
●
●
●
AC V
●
●
●
●
DC I
●
●
●
●
AC I
●
●
●
●
Ω
●
●
●
●
CAP
●
●
●
●
SENSOR
●
−
●
●
−
−
−
−
Tab. 6.1: Measurement functions with possible math options
between the recorded measurements. For instance, if the
function Interval is set to 2, all 2s will be included in the
measurements. In addition, the soft menu key COUNT
and the knob enable you to set the number of measure-
ment values to be captured. Pressing the TRIG key starts
the capture of measurement values. For instance, if you
set an INTERVAL of 2s and a COUNT of 5, 5 measure-
ment values will be captured in intervals of 2s. During the
capture of the measurement values, the LED for the TRIG
key is blinking and the label „Trig“ is displayed on the
upper right of the screen. Alternatively, the label „Armed“
indicates that the instrument is waiting for a trigger (e.g.
waiting for the TRIG key to be pressed again) and is
consequently not triggering at the moment.
❙
Auto
(Default Setting):
In the trigger mode AUTO, the instrument does not wait
for a specific event. Instead, it performs permanent
measurements. The number of measurements is depen-
dent on the selected ADC rate. In addition, you may
define a threshold. The measurement value display
changes depending on the selected treshold settings. If
the function CONTINUE is activated, the display runs
continuously. For the function ABOVE/BELOW THRES-
HOLD a measurement value is not captured until the
current value falls below or exceeds the set treshold. If
the instrument triggers permanently, the label „Trig“ will
be displayed on the upper right of the screen.
Depending on which settings for the time interval and the number
of measurement values to be captured have been confirmed in the
trigger menu, these settings will be synchronized with the logging
menu (see chapter 6: Mathematical Functions).
Summary of Contents for HMC8012
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