Description; Operating Procedure; Switching On; Dc Zero Adjustment - Chauvin Arnoux PAC 11 Manual De Instrucciones

2/ DESCRIPTION

See descriptive diagram at the end of the User Manual :
ΠPassage of the conductor
 Jaws
Ž Protective non-slip guard
 Automatic zero DC button
 Red fault light (over range / incorrect zero adjustment)
‘ Green light indicating correct power supply
’ 3-position sliding switch (off / selection of 1 mV/A or 10 mV/A ranges)
“ Hand-held parts
” Fitted lead 1.5 m
• Safety plugs ∅ 4 mm

3/ OPERATING PROCEDURE

3.1/ SWITCHING ON

Set the sliding switch ’ to the appropriate position, 40 A range (sensitivity
10 mV/A) or 400 A range (sensitivity 1 mV/A). Correct operation is
indicated by a green light ‘ indicating that the battery is in good condition.
After approximately 10 minutes of operation of the clamp without manipu-
lation of the control buttons, the power supply cuts off automatically (see
" Auto off " below).
If this green indicator does not come on when the clamp is switched on,
or goes out before it has operated for 10 minutes, it is necessary to replace
the battery (see MAINTENANCE chapter).

3.2/ DC ZERO ADJUSTMENT

Ensure that the jaws of the clamp are correctly closed and that they do not
enclose any conductor. Connect the clamp to your measurement instru-
ment. Press the auto zero button . The red light  comes on for
approximately three seconds to indicate that the instrument is on zero
calibration. If zero can not be obtained, this indicator light remains lit to
indicate the fault.

3.3/ MEASUREMENT

After having switched on the clamp, connected it to the measurement
instrument on the appropriate range, and followed the auto zero procedure
(see the two paragraphs above), clamp the conductor to be measured Œ
between the jaws of the clamp.
The value is displayed on the measurement instrument.
Depending on the sensitivity selected on the clamp and the range of your
measurement instrument, apply the conversion ratio to get the value of the
current.
On DC current measurement, ensure that the arrow located on the
external edge of the jaws  corresponds to the direction of the
current flowing in the conductor. (source ⇒ receiver)

3.4/ OVERLOAD INDICATION

Detection of overload of the range of the clamp is indicated by the red light
. This indicator flashes for a peak current greater than 60 A on the 40 A
range (10 mV/A) or 600 A on the 400 A range (1 mV/A).
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