D e t e c t i o n
AirWatch MK 1.2
User Manual
10
5. Various Parts Highlighted
PUMP
(ART.# 501213/ 501214)
The pump has large valves. If you replace the filters regularly and on time, it will enhance the lifespan of the pump. On
average, it will last at least 5,000 hours, and may be replaced only by trained personnel or by request your distributor.
FILTERS
(ART.# HW-008-3022-010M FOR 10 FILTERS OR HW 008-3022-0100M FOR 100 FILTERS)
It is essential that the AirWatch must always be used with the 0.22- micron PTFE filter supplied. This filter is installed at
the bottom of the device. Without it, dirt and dust can be sucked into the device and damage the pump, electronics and
sensors. The external filters must be replaced regularly: how often depends on the environment in which the unit is being
used. Steam and dust shorten the lifespan of the filter. Filters are available from your distributor.
LIGHTING
The AirWatch has a backlight display so that it is visible in dark areas or when built in to a machine. The protective cover
must be kept closed as much as possible to keep out moisture and dirt. The activation buttons are located outside of the
protective cover, so they too, are moisture and dirtproof.
RS485 MODBUS
RS485 is a serial communication method for PCs and other devices. It is widely used where multiple data acquisition and
control systems communicate with each other. The AirWatch is equipped with it as standard, and is available through 3
pins connector (art.# 501143).
Protocol available on www.WatchGas.eu or ask your distribitor.
NOTE:
If the AirWatch is equipped with a wireless module you have to choose between using modbus or wireless.
DELAY TIME
The AirWatch has a delay time of 0-60 minutes (this can be configured with configuration software, which you can find
on www.watchgas.eu). With a delay time, it will continue to measure after the machine has been turned off and while the
engine and exhaust remain hot. When the preset time has elapsed, it shuts down.
PROTECTIVE COVER
The cover has multiple functions, protecting the AirWatch against dust and moisture and against use by untrained person-
nel.
DATA LOGGING
Datalog is basic. The datalog interval can be setup with the configuration software. SD cards for the data logger and
configuration files can be inserted in the appropriate slot, making it easy to configure your device for a different
application. The SD card can easily be removed by opening the protective cover and carefully pressing the card with one
finger until it pops out. The SD can be read using your computer. To read the card, select it in Windows Explorer and open
the ‘logs’ folder to view log files arranged by date and in text format. This data can be imported into Microsoft Excel and
other tools. A 4GB SD card will be full in approximately 166 days if the data logging interval is one second.
NOTE:
If the files are not arranged by date, click on ‘last modified’ and the latest data will appear at the top.
HOUSING
The electronics and components in the AirWatch are protected by a robust IP65 housing with reflective contrast areas on
the outside to enhance its visibility. The metal mounting plate also serves as protection for the connections on the bottom.
LAST-O-MORE HOSE (
ART.# 8719992974764)
AND BALLFLOAT (
ART.# 8719992974764)
If you are going to carry out a measurement at a distance from the device, for example in a confined space, you must
use our WatchGas Last-o-More sampling hose (3x5 mm Art.Nr. 411 0018 038 and 5x8 mm Art.Nr. 411 0018 039) and our
WatchGas Ball float. When you carry out a measurement in this way, there is a delay of approximately three seconds per
linear metre of hose.
FLOW REGULATOR (
ART.# CAL-C000001)
For bump test and calibration a demand flow regulator is recommend, for the toxic gases we recommend to use a stain-
less steel flow regulator 1.0 lpm with use of an t piece see figure below the demand regulator on a gas bottle ensures the
correct quantity of gas necessary to carry out a calibration or bump. Because the pump creates a vacuum, the regulator will
release the gas, enabling it to flow over the sensors. The supply is demand-based to prevent the loss of gas.
For good bump results, the system must be leakproof. Connect the hoses tightly and screw the regulator onto the bottle so
that it is straight. The connections should be hand-tight, so do not use wrenches, pliers etc.
