Ht-instruments M71 Manuel d'utilisateur télécharger pdf (Page 10)

M71

EN – 9

CAL

After pressing the CAL key the instrument carries out zero setting of cables'

resistance (this procedure takes approx. 30sec). Cables with a resistance up

to 2Ω can be calibrated.

CAUTION

When “Measuring…” is displayed the instrument is effecting measurement.

During this phase do not disconnect test leads from the instrument.

7. At the end of the test the measured value

is stored by the instrument and used as

OFFSET (that is to say deduced from all

EARTH 2W measurements) for all

subsequent measurements till a further

zero setting. The instrument emits a

double sound tone indicating the positive

outcome for zero setting and displays

again the initial screen by the symbol

CAL.

Symbol CAL:

indicates that the

instrument was

calibrated; this

symbol is

displayed for each

subsequent

measurement

even though the

instrument is

switched off and

on again.

8. If during cables' zero setting the value

measured is higher than 2Ω the

instrument interrupts such setting

procedure, removes the previous offset

value and does not display the symbol

CAL until a cables' zero setting is

successfully carried. out The instrument

emits a long sound tone indicating the

unsuccessful setting outcome and has

been displaying a screen similar to the

side one for about 2 seconds, then it

displays a default screen.

Note: this procedure can be used also to

cancel the last value stored for cables'

zero setting.

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Ht-instruments M71 Manuel d'utilisateur Page 10

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