Siemens Pacemaker UM344-2 Bedienungsanleitung PDF herunterladen (Seite 87)

UM344-2 ON-LINE AND OFF-LINE OPERATION

August 1995

5.1.3.2 Local Pushbutton Input

Ranging (Controller OFF)

The low and high process temperatures selected as the 0%

and 100% span points may be applied to the transmitter and

stored in the EEPROM using the ZERO/FULLSCALE

pushbuttons. This procedure assumes the transmitter is field

mounted to an operating process. If the transmitter does not

contain an optional Digital Meter to report the process

variable, other instrumentation on the Network must be

available to provide this information.

1. Open the sliding cover on top of the Transmitter's

housing to access the ZERO/FS pushbuttons. See Figure

1-1.

2. Change ZERO range value:

1) Supply new ZERO value.

If the process variable currently being reported by

the Transmitter is not the desired ZERO value, then

the process must be manipulated by an operator to

arrive at the desired value.

2) Activate the Pushbutton Mode

Press and hold for 5 seconds or more the ZERO

pushbutton, then release the pushbutton

3) Enter ZERO Value

Press and release the Zero pushbutton. The new

0% range value is stored in memory. If an optional

Digital Meter is installed, observe that the "PB"

annunciator in the display extinguishes (Normal

Mode).

When a new 0% value is set, the Transmitters 100%

value is automatically shifted to maintain the original

span except as follows:

• If the process is out of range, no new ZERO

value is stored.

• If the new ZERO value would shift the

FULLSCALE value past the sensor limit, the

new FULLSCALE value is automatically set

to the appropriate sensor limit (except in the

case where this would produce a span that is

1 2 ... 82 83 84 85 86 87 88 89 90 91 92 ... 182 183

Keine Kommentare

Siemens Pacemaker UM344-2 Bedienungsanleitung Seite 87