PS081 datasheet(109/155 Pages) AMSCO

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6-6

PSØ81

Descriptions:

A :

Discharge time measurement at SG_A1

B :

Discharge time measurement at SG_A2

C :

Discharge time measurement at SG_B1

D :

Discharge time measurement at SG_B2

E :

Discharge time measurement at SG_C1

F :

Discharge time measurement at SG_C2

G :

Discharge time measurement at SG_D1

H :

Discharge time measurement at SG_D2

P1:

Discharge time measurement at TMP_1

P2:

Discharge time measurement at TMP_2

Formats:

HB1:

Result in 100 ppm, HB1/100 = result in ppm

HB2:

Result in 100 ppm, HB2/100 = result in ppm

HB3:

Result in 100 ppm, HB3/100 = result in ppm

HB4:

Result in 100 ppm, HB4/100 = result in ppm

HB0:

Result in 100 ppm, HB0/100 = result in ppm

TMP:

Result(Tmp)

= TMP/224

Status: See above

HB1+: Result (HB1+)/ns = 250 * HB1+ /214 [4MHz clock]

CAL:

Result (Cal)/ps = 250,000 / CAL

[4MHz clock]

UBATT: Result (UBATT)/V = 2.0+1.6*UBATT/64

HB1, HB2, HB3, HB4, HB0 and TMP are given as two’s complement. MSB = 1 indicates a negative

value. To get the positive value calculate X – 224.

Explanation:

Based on a standard extension of a load cell (2 mV/V) the resistance variation is 0.2 %, e.g. 2

Ω at

a 1000

Ω load cell. The change of 0.2 % corresponds to 2000 ppm. For reasons of internal calcula-

tions and accuracy, the result is given in x100 of 2000 ppm (= 200,000 ppm). Please note, that the

value in this register depends not only on the load cell’s sensitivity but also on the Mult_HBx setting in

PS081. This explanation is based on Mult_HBx = 1.

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