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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.

070615/8

Response and reaction times

The response time t

next figure.

Both depend on the primary current di/dt. They are measured at

nominal ampere-turns.

The "di/dt accurately followed" mentionned in the electrical data

table is defined as the di/dt of the primary current for which the

response time is equal to 1 µs.

Figure 20: response time t

t

ra

Electrical offset

The electrical offset current I

when the ferro-magnetic parts of the transducer are:

shown above.

Using the current cycle shown in figure 19, the electrical

offset is:

The temperature variation I

I

considered temperature:

Note: the transducer has to be demagnetized prior to the

application of the current cycle (for example with a

demagnetization tunnel).

Overall accuracy

The overall accuracy at 25°C X

range, relative to the rated value I

It includes:

OE

ε

G

ε

The magnetic offset is part of the overall accuracy. It is

taken into account in the linearity error figure provided the

transducer has not been magnetized by a current higher

than I

2

)

(

)

(

2

1

t

Is

t

Is

OE

I

+

=

)

25

(

)

(

)

(

C

I

T

I

T

OT

I

OE

OE

°

−

=

Performance parameters definition (continued)

LAX series 16-100 A

I

90

%

10

%

t

100

%