![background image](http://html.mh-extra.com/html/aeroqual/930-series/930-series_user-manual_2862863017.webp)
Page | 17
Aeroqual Series 930 User Guide
Section 5
Data transfer mechanism
1. Floating point data (4 bytes) send sequence is low byte first, high byte last, such as section 4's data
DATA1, ALARM1, ALARM2 etc.
2. Broadcast command - when network master broadcast a command to RS485 bus, every unit
connected to the bus has to perform the action immediately without reply. Whether the command has
been performed or not can be tested using a specific sensor command to poll an individual unit. If
some sensor heads do not perform the action the network master needs to rebroadcast the command
again.
3. Specific unit sensor measured gas concentration request. Once a sensor head measures a new
concentration it will set STATUS1 b7 to zero indicating the value is valid. However, when the new
data has been sent out the STATUS1 b7 DATA_UNVALID bit will set to 1 indicating the data not valid.
4. Timing issue (VERY IMPOTANT): The master request command frequency can't be less than 1
second per command; otherwise, the network will be unstable.
Section 6
RS485 communication port settings:
Baud rate:
4800
Data bits:
8
Stop bits:
1
Parity:
none
Flow control:
none
9. Care and Maintenance
Your Aeroqual Monitor is a product of superior design and quality and should be treated with care.
When using your Aeroqual Monitor:
Keep it and all its parts and accessories out of the reach of small children.
Keep it dry. Avoid water and/or condensation as humidity and liquids may damage sensitive
electronics and the Li battery.
Do not use or store in dusty, dirty areas.
Do not store the monitor in temperatures below 10°C or above 35°C.
This unit is designed for use at temperatures between -5°C and +45°C however please consult
recommended operating temperature for the sensor head which may be different. Avoid sudden
changes in temperature which may cause condensation that can damage the electronics.
Do not attempt to open. Non-expert handling of the device may cause damage.
Do not drop, knock or shake as this could lead to internal damage.
Do not use harsh chemicals, cleaning solvents or strong detergents for cleaning. Wipe with a soft
cloth slightly dampened with a mild soap-and-water solution
9.1. Disposal / Recycling
Please note that this is an electronic product and disposal should be in line with your local or country
legislation. The plastic casing of the product is made from a Polycarbonate / ABS blended material
(PC + ABS) and is marked accordingly.