Honeywell AirScan iR Instruction Manual page 12

Refrigerant sensor for industrial applications

Hide thumbs

Table Of Contents

Operation

Modes of Operation

The Manning AirScan

operation and calibration:

•

Normal run mode with output filtering

•

Normal run mode without output filtering

•

4/20 mA loop check

•

4/20 mA calibration to an external PLC or

read-out panel

•

Neutral gas resting point or "zero" calibration

mode

•

Span calibration modes

Normal Run Modes

Normal run mode with output filtering

This mode outputs a signal from 4 to 27 mA with a

"dead band" from 4 to 4.6 mA. This "dead band"

masks small environmental anomalies that could

facilitate output signal fluctuations or transients

around the 4 mA resting point when the unit is not

sensing target gas.

Start: If the "system" LED is blinking slowly, press

and hold both S1 and S2 simultaneously for 1 second

or more until the "system" LED is continuous ON,

then release both buttons. If the "system" LED is

blinking fast, this mode cannot be engaged and the

factory needs to be contacted. See the following

example.

LED

SEQUENCE

POWER

SYSTEM

CALIBRATE

FAULT

mA FAULT

SOURCE

ATMOS

Manning AirScan-iR Refrigerant Sensor

continued

iR has various modes of

OFF

N/A

Normal run mode without output filtering

This mode outputs a signal that nominally rests at 4

mA and can range continuously from 0 to 27 mA. Any

subtle changes in sensor response will be sent to the

mA loop output. This mode is entered automatically

when the calibration modes are activated. Some users

may wish to see the subtle anomalies in the signal

near the nominal 4 mA rest area.

Start: If the "system" LED is continuous ON, press

and hold both S1 and S2 simultaneously for 1 second

or more until the "system" LED is blinking slowly then

release both buttons to enter this mode. If the

"system" LED is blinking fast this mode is always

engaged and can only be exited by fully calibrating

the unit. See the following example.

LED