Measurem Ent Operation; Dc Voltage Measurement - Digimaster DM38A Manual De Empleo

Measurem ent Operation

Make s ur e the Sl ee p Mo d e is not on if y ou f ound the re is n o d ispl ay on th e LCD af ter turni ng on th e Meter.
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Make su re th e Lo w Batte ry Displ ay is
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Pay extr a attention to the sy mbol
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bef ore c arry in g o ut measurem ent.
A. DC Volta ge Mea sure ment
Warning – To avoid har ms to you or da m age s to the Met er fro m electric shock, pl ea se do not at te mp t to
mea sure voltag es high er th an 1 00 0V or 75 0V r ms although r eadings ma y be obt aine d.
Tak e extra attention wh en me asuring high vol tag es t o avoid electric shoc k.
To measure DC v oltage, con nect the Meter as f ollows:
7. Insert th e red test lea d into t he VΩ inp ut termin al a nd t he black test lea d int o the C O M input ter mi nal.
8. Set th e rot ary switch to a n appro pri ate measur em ent p ositi on i n V
9. Con nect the test le ads acr oss with th e obj ect bein g me asu red.
The m eas ur ed v al ue s ho ws on th e dis play
Note
If the v alue of v oltag e to be meas ur ed is unkn own, us e th e m axim um me asu reme nt p ositi on (100 0V) an d red uce
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the r ange ste p by step u ntil a satisfactory rea din g is o btai ned.
The LCD disp lay s "1" in dicati ng the existi ng s elect ed rang e is ov er lo ad ed, it is re quire d to select a hi g her rang e i n
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ord er to obt ain a cor rect r ea di ng.
In e ach r an ge, t he Meter has an input im pe dance of appr ox. 10 MΩ. This load ing eff ect can c ause me asu rement
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err ors i n hig h im ped anc e circ uits. If the circu it impe dance is less t ha n o r e qual to 1 0k Ω, th e err or is ne gli gi bl e
(0.1 % o r less ).
When DC v oltag e m eas urement has be en c omp let ed, discon nect the co nnectio n bet we en th e testin g le ads a nd
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the circ uit u nder test.
not o n, other wise f alse r ea di ngs m ay be pr ov ided.
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which is loc ated besides the input te rmi na ls of the Meter
(figure 3)
black red
rang e.