Chauvin Arnoux C.A 6116, User Manual

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8.4. IntRInsIC UnCERtAInty AnD oPERAtInG UnCERtAInty
The C.A. 6116 installation tester complies with standard IEC-61557, which requires that the operating uncertainty, called B, be
less than 30%.
„ In insulation, B = ± ( |A| + 1,15
√
E
1
² + E
2
² + E
3
² )
with A = intrinsic uncertainty
E
1
= influence of the reference position ± 90°.
E
2
= influence of the supply voltage within the limits indicated by the manufacturer
E
3
= influence of the temperature between 0 and 35°C.
„
In continuity measurement, B = ± ( |A| + 1,15
√
E
1
² + E
2
² + E
3
² )
„
In loop measurement, B = ± ( |A| + 1,15
√
E
1
² + E
2
² + E
3
² + E
6
² + E
7
² + E
8
² )
with E
6
= influence of the phase angle from 0 to 18°.
E
7
= influence of the network frequency from 99 to 101% of the nominal frequency.
E
8
= influence of the network voltage from 85 to 110% of the nominal voltage.
„
In earth measurement, B = ± ( |A| + 1,15
√
E
1
² + E
2
² + E
3
² + E
4
² + E
5
² + E
7
² + E
8
² )
with E
4
= influence of the interference voltage in series mode (3 V at 16.6, 50, 60, and 400 Hz)
E
5
= influence of the resistance of the rods from 0 to 100 x R
A
but ≤ 50 k W .
„ In test of residual current device, B = ± ( |A| + 1,15
√
E
1
² + E
2
² + E
3
² + E
5
² + E
8
² )
with E
5
= influence of the resistance of the probes within the limits indicated by the manufacturer.
8.5. PowER sUPPly
The device is powered by a 9.6 V, 4 Ah rechargeable NiMH battery pack.
8.5.1. nIMH tECHnoloGy
The NIMH technology has many advantages:
„
long life between charges with limited bulk and weight,
„
the possibility of recharging your battery rapidly,
„ a very small memory effect: you can recharge your battery even if it is not fully discharged, without reducing its capacity,
„
protection of the environment through the absence of polluting materials such as lead and cadmium.
The NiMH technology allows a limited number of charging/discharging cycles that depends on the conditions of use and the
charging conditions. Under optimum conditions, this number of cycles is 200.
8.5.2. bAttERy CHARGE
The battery charger of the device is in two distinct parts: an external power supply and a charger built into the device.
The built-in charger manages the charging current, the battery voltage, and the internal temperature of the battery simultaneously.
This optimizes charging while guaranteeing a long battery life.
The day before you use your device, check its charge condition. If the battery level indicator shows less than three bars, charge
the device overnight (see §1.2).
The charging time is approximately 6 h.
In order to extend the life of your battery:
„
Use only the charger supplied with your device. The use of another charger may prove dangerous!
„
Charge your device only between 10 and 35°C.
„
Observe the conditions of use and storage stated in this data sheet.
Do not make measurements on mains while charging the battery.
A new battery reaches its full efficiency only after several complete charging/discharging cycles. This will not however prevent
you from using your device when it has been charged for the first time. However, we recommend making the first charge a full
charge (at least 7 hours).