Siemens SITRANS P Instruções de Operação descarregar pdf (Página 81)

6.5.3.2 Setting/adjusting the start of scale value

NOTICE

Inadvertent adjustment of parameters on devices without display or without visible display

Key lock is canceled if you press the [M] key for longer than 5 seconds, see chapter

"Releasing key lock or function lock

(Page 91)". In the case of a device without display or

without a visible display, you could inadvertently change parameters.

● Always press the [M] key for less than 5 seconds.

Introduction

Set or adjust the start of scale value of the pressure transmitter in mode 2.

You

can also adjust the start of scale value or the full scale value separately as well as adjust

both these values one after the other.

Condition

You are familiar with the correct operation of the transmitter and the associated safety notes.

You have selected a reference pressure that corresponds to the start of scale value and is

within the permissible tolerance range.

The transmitter is in "Pressure" measuring mode.

Setting start of scale value

To set the output current of the start of scale value to 4 mA, proceed as follows:

1. Create the reference pressure.

2. Set mode 2.

3. Set the start of scale value to 4 mA.

4. Save with the [M] button.

Adjusting start of scale value

If you do not set the output current but constantly adjust it, you need to calculate the currents

to be adjusted mathematically.

To the adjust the output current of the start of scale value, proceed as follows:

1. Create the reference pressure.

2. Set mode 2.

3. Adjust the output current of the start of scale value to the calculated value.

4. Save with the [M] button.

Operation

6.5 Local operation

SITRANS P, DS III series with HART

Operating Instructions, 09/2012, A5E00047092-08 79

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Siemens SITRANS P Instruções de Operação Página 81