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MEASURING PROCEDURES
General Procedures:
When connecting or disconnecting test leads to
a circuit, always first turn off power to device or circuit being tested and
discharge all capacitors.
If magnitude of signal is not known, set
switch to highest range and reduce until satisfactory reading is
obtained.
Strictly observe the max input limits.
D • Meßprozeduren
Allgemein:
Vor Verbinden und Trennen der Meßkabel mit dem Schaltkreis,
diesen abschalten und Kondensatoren entladen,
Bei unbekannter Signalgröße,
bei höchstem Bereich beginnen and dann niedriger schalten bis gate Auflösung
erreicht wird.
Maximale Grenzen nicht überschreiten.
E • Procedimientos de medida
En general:.
Cuando vaya a aplicar o retirar las pumas de prueba a/de un cir-
cuito, en primer lugar desconecte siempre la alimentación del dispositivo o cir-
cuito sometido a prueba y descargue todos los condensadores.
si no conoce
la magnitud de la señal, ponga el selector en la escala más alta y vaya reducien-
do hasta obtener una lectura satisfactoria,
Observe estrictamente los límites
máximos de entrada .
F • Procédures de Mesure
Général:
Avant de connecter ou de déconnecter les cordons de test, coupez I
lálimentation du circuit mesuré et déchargez les condensateurs.
Si la magni-
tude du signal n'est pas connue, commencez avec le calibre le plus élevé, et
diminuez ensuite jusqu'à obtenir une bonne lecture.
Ne dépassez pas les lim-
ites d'entrée.
DC AND VOLTAGE MEASUREMENT (See Fig 1)
Connect red test lead to V-W Input and black test lead to COM Input.
Set
Function/Range Switch to desired DCV or ACV position.
Touch Probe tips
across voltage source (in parallel with circuit).
Voltage value will appear on
Digital Display along with the voltage polarity (negative DC measurements).
N N o o t t e e f f o o r r A A C C M M e e a a s s u u r r e e m m e e n n t t s s : : The AC converter used in the HD110, HD110T and
320 models is "average-responding." An RMS value is determined by first recti-
fying and filtering the signal to obtain the average value. The average value is
then scaled upward by a factor of 1.11 to obtain the RMS value. Different scaling
factors need to be applied for other waveforms (1 for square waves; 1.733 for
triangle; 3.247 for full wave rectified sine wave; 2.591 for half wave rectified sine
wave). Please note that these correction factors only apply for standard wave-
forms that are free from noise and distortion. True RMS values of nonsinusoidal
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