43
Instrument Functions
type. The measurement value may be displayed in °C, K or
°F (Unit). To perform precise measurements, it is neces-
sary to compensate for the measurement section with the
NULL function, especially for the two-wire measurement.
PT sensors include a lead resistance which is typically
indicated on the data sheet. For an optimally adjusted mea-
surement section, it is necessary to know the exact lead
resistance. The measurement rate in this case is 10 measu-
rements per second.
5.7 Continuity / Diode Testing
Pressing the key
opens the main menu for the diode
and continuity testing If the soft menu key is marked in
yellow, the respective function „Diode or Continuity is
activated. For both functions, you can define / set a so-
called thres-hold via soft menu key „Threshold. In addition,
the soft menu key Beep allows you to activate (On) or
deactivate (Off) an acoustic signal to be used in case of a
threshold violation. For the diode testing, the measurement
rate is 10 measurements and for the continuity testing 200
measurements per second.
5.8 Measuring with HOLD Function
The HOLD function allows you to maintain the current
measurement results on the display. If you press the HOLD
key (white LED is illuminated), the measurement result(s)
will be frozen on the display. Press the HOLD key again
(LED is off) to deactivate the function.
5.9 Trigger Function
Pressing and holding the TRIG key or pressing the SETUP
key (submenu TRIGGER) opens the trigger menu. The soft
menu key Mode and the knob allow you to select the res-
pective trigger mode. There are three different options to
trigger a measurement:
Manual:
If the trigger mode „Manual“ is selected, press the key
TRIG to start recording measurement values. The TRIG key
blinks while measurement values are captured. Press the
TRIG key again to stop the capture of measurement values.
The TRIG key will stop blinking. The label „Armed“ indica-
tes that the instrument is waiting for a trigger (waiting for
the TRIG key to be pressed again) and is consequently not
triggering at the moment.
Fig. 5.9: Diode testing
- +
Diode
Single:
In the trigger mode Single, the soft menu key „Interval“
and the knob allow you to select a measurement interval.
The measurement interval describes the time between the
recorded measurements. For instance, if the function Inter-
val 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 measurement values to be captu-
red. Pressing the TRIG key starts the capture of measure-
ment values. For instance, if you set an Interval of 2s and a
Count of 5, 5 measurement values will be captured in inter-
vals 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 measure-
ments. The number of measurements is dependent 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 Threshold a measurement value is not cap-
tured 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.
Fig. 5.10: Trigger menu Auto
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).
