Honeywell DCP552 Mark II Input Process Functions, Model without carbon potential CP compensation

Chapter 5. FUNCTIONS

5 - 4 Input Process Functions

This section uses diagrams to describe input processes.

■Model without carbon potential (CP) compensation

Analog input 1

Input range type

A/D conversion

Wiring resistance compensation

Cold junction compensation

Square-root extraction

Upper and lower limit value scaling

Temperature unit range

Upper and lower limit alarm

Equalizer (approximation by linearization table)

Bias

PV shift

Digital filter

Setting: setup data C01

(For resistance temperature detector)

(For thermocouple)

Setting: setup data C07, C10

(For DC current or voltage) Setting: setup data C08, C09

(For DC current or voltage) Setting: setup data C04 to C06

(For thermocouple or resistance temperature detector) Setting: setup data C02, C03

Setting: setup data C30

Variable parameters PA51 to PA70

Setting: variable parameter PA13

Setting: program setting PV shift item

Setting: variable parameter PA12

Analog input 2

Input range type

A/D conversion

Wiring resistance compensation

Cold junction compensation

Square-root extraction

Upper and lower limit value scaling

Temperature unit range

Upper and lower limit alarm

Equalizer (approximation by linearization table)

Bias

PV shift

Digital filter

Setting: setup data C11

(For resistance temperature detector)

(For thermocouple)

Setting: setup data C17, C20)

(For DC current or voltage) Setting: setup data C18, C19

(For DC current or voltage) Setting: setup data C14 to C16

(For thermocouple or resistance temperature detector) Setting: setup data C12, C13

Setting: setupdata C30

Variable parameters PA71 to PA90

Setting: variable parameter PA23

Setting: PV shift item in program setting

Setting: variable parameter PA22

PV (PV1) PV2

NOTE

The use of equalizer (approximation by linearization table) is shown in the figure below.

When a sensor with curved characteristics is used to measure PV, a linearization table is used.

PV input (sensor output)

Correction point no.10 Correction point no. 9 Correction point no. 8

Correction point no. 7

Correction point no. 6

Correction point no. 5

Correction point no. 4

Correction point no. 3 Correction point no. 2 Correction point no. 1

No.10

No.9

No.8

No.7

No.6

No.5

No.4

No.3

No.2

Actual PV

No.1

: (right facing arrow) indicates negative correction.

: (left facing arrow) indicates positive correction. : (bullet) indicates 0 correction.

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