Characteristics
•
The sample gas line is thermostatted to prevent condensation of the flue gas.
•
The measuring device regulates the heating.
•
When free from voltage, the heated sample gas line is purged with instrument air.
3.3.8
Instrument air, conditioning
Overview
If the supplied instrument air does not meet the required quality, an instrument air
conditioner can be connected upstream from the pressure gauge.
Important information
NOTICE
Malfunction of the measuring device due to unsuitable instrument air
Operation with air not satisfying the specifications voids the warranty and does not
ensure proper functioning of the measuring device.
b
Only feed conditioned instrument air to the measuring device.
b
The instrument air quality must meet the specification.
Function
The instrument air conditioning serves to condition the compressed air provided by the
operator.
Additional information
A separate instrument air supply as zero gas or test gas can be connected as an
alternative.
Related topics
•
Instrument Air Conditioning Operating Instructions
•
Instrument air quality:
3.4
Interfaces
3.4.1
Extended interfaces (option)
As standard, analog and digital signals are used for device communication with cus‐
tomer peripherals. Alternatively, output can be performed using the Modbus-TCP proto‐
col.
Optionally, SICK offers various converter modules that are installed by the customer
and communicate with the device via Modbus® TCP.
Optionally available
•
PROFIBUS / PROFINET
Modbus
Modbus
®
is a communication standard for digital controls to create a connection
between a »Master« device and several »Slave« devices. The Modbus protocol defines
the communication commands only but not their electronic transfer; therefore it can be
used with different digital interfaces (Ethernet).
PRODUCT DESCRIPTION
3
8021339/1CHC/V1-1/2021-07 | SICK
O P E R A T I N G I N S T R U C T I O N S | MARSIC280
21
Subject to change without notice
