Adjustment - Chauvin Arnoux C.A 6250 Manual De Instrucciones

When the password has been validated, a submenu proposes the various maintenance functions :
- the 56 key is then used to navigate in the functions menu,
- the desired function / command is selected by pressing the4key
CPt A
(1st press)
AdJ
(2nd press)
nCOEF
(3rd press)
UP9
(4th press)
FrEq
(5th press)

5.2.1 Adjustment

As part of the tracking of metrological quality, the user may be led to perform periodic performance
checks him/herself. The checks must include the usual metrological precautions. Comply with the
following instructions.
The operations are performed in the reference conditions, i.e.:
Temperature of the room: 23 °C ± 5 °C.
Relative humidity: 45 % to 75 %.
The standards that make up the checking chain must be such that the errors at the testing points are
known and are ≤ ± 0.01 % for the resistance standards, with allowance for the factors of influence
encountered.
If this check shows that one or more characteristics of the instrument are outside the specified
tolerances, you must:
either return the instrument for verification and adjustment:
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- in mainland France, to our COFRAC-accredited metrology laboratories or to a Manumesure
agency - Information and coordinates on request (tel.: 02 31 64 51 43)
- outside mainland France: to a Chauvin Arnoux subsidiary or to the dealer who sold you this
equipment
or make the adjustment using the procedure below, which requires equipment at least as effective
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as that used for the check performed previously.
Adjustment procedure
RECOMMENDATIONS
The instrument was adjusted in the factory. Any untimely work irreversibly alters the adjustments
of the instrument.
The person responsible for the use of this instrument must make sure that the person in charge
of the work has been informed of the precautions to be taken in performing this operation.
For the adjustment to be performed under ideal conditions, Chauvin Arnoux recommends
returning the instrument to its workshops.
Failure to comply with these recommendations may void the warranty.
Display the values of adjustments counters for the various ranges
Pt100, 2500 Ω, 250 Ω, 25 Ω, 2500 mΩ, 250 mΩ, 25 mΩ, 5 mΩ
Adjust the instrument, refer to § 5.2.1
Delete the adjustment coefficients and use the default coefficients.
Restarting the instrument cancels the previous action.
Update the program of the instrument, refer to § 5.2.2
Select the line power frequency, 50 or 60 Hertz
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