WIKA operating instructions attachable indicator model A-IAI-1
5
EN
14016825.04 07/2021 EN/DE
2. Design and function
2. Design and function
2.1 Description
The model A-IAI-1 attachable indicator is a general-purpose, microproces-
sor-controlled indicator for standard 4 ... 20 mA signals. It does not require
its own power supply, but rather, it is powered directly from the measuring
current. The display of the measured value is made on a 4-digit LC display
with a maximum indication range of -1999 ... 9999 digits.
The model A-IAI-1 attachable indicator is suitable for use in hazardous areas
in accordance with:
II 2G Ex ia IIC/IIB T4 Gb or II 2G Ex ib IIC/IIB T4 Gb
The A-IAI-1 has been designed for the connection of any intrinsically safe
transmitter (with 4 ... 20 mA output). The matching of the indicator range to
the transmitter is made without external aids through the direct input of the
upper and lower measuring range limits and the decimal point position. The
parameters and limit values are entered using three keys. All programmable
parameters are saved in an EEProm and are retained in the event of a loss of
power (for a minimum of 10 years).
The attachable indicator has its own integrated self-diagnostics, which
continuously checks that the key components of the instrument are working
properly. The integrated self-diagnostics, as well as the reporting of an
over-range or under-range condition, ensure high operational safety.
The attachable indicator is delivered tested and fully calibrated. It is therefore
ready for operation, though it must first be configured for the particular appli
-
cation. See chapter 5.3 “Configuration of the display”.
2.2 Scope of delivery
The scope of delivery includes the following components:
■
Attachable indicator
■
2 mounting screws (68 mm and 75 mm)
■
Black profile sealing
■
Operating instructions
Cross-check scope of delivery with delivery note.
