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without prior permission of CHIPSEA

聚点滴之芯．成浩瀚之海

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Calibration

disabled

Allowable calibration times are 6 at present. The chip will be calibrated before it is

delivered.

3.6.2 Delivery Calibration Parameters as Well as Current, Voltage and Power Formula of

the Chip

Delivery calibration parameter of CSE7759B is 1mR manganin resistor (resistor at V1P and

V1N will be identified as V1R hereunder) at V1P and V1N, and is 1M resistor at V2P (resistor at

V2P will be identified as V2R hereunder) and input load signal is 5A, 220V(see Figure 2). Thus,

V1R and V2R may be neglected when calculating if external hardware is consistent with

calibration parameter upon delivery.

◆Current calculation formula:

Measured current Ix(A)=

current coefficient （hexadecimal number）

current cycle (hexadecimal number) ∗ V1R

◆Voltage calculation formula:

Measured voltage Ux(V)=

voltage coefficient （hexadecimal number） ∗ V2R

voltage cycle (hexadecimal number)

◆Power calculation formula:

Measured power Px(W)=

Power coefficient（hexadecimal number） ∗ V2R

Power cycle (hexadecimal number) ∗ V1R

Note: If the parameter at V1P and V1N is 1mR manganin resistor, V1R=1; if the parameter

at V1P and V1N is 2mR manganin resistor, V1R=2 and so forth; if the parameter at V2P is 1M

resistor, V2R=1; if the parameter at V2P is 2M resistor, V2R=2 and so forth.

It is only the chip that is calibrated upon delivery calibration rather than complete machine.

Thus, little error will exist (different from the noise generated by PCB; the error range is

different tool). If the error is unacceptable to the user after testing, it may be calibrated by the

user. Consult to the Company for details.

3.7 Electric Quantity Calculation

3.7.1 Frequency of CF