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10. Specifications
NOTE:
All of the transistor outputs (those shown asterisked above *) are open collector current sink. The maximum
rating of these transistor outputs is 12VDC at 150mA
Should you connect a relay or any other inductive load to the transistor outputs, a back EMF suppression
diode must be fitted across the load.
Aeroqual accepts no responsibility for damage to this product or any other issues arising from the non-
compliance with the above directives. Failure to implement these directives will invalidate the warranty on
this product
Series 300, 305, 500 and 505 Monitor Bases
Measurement units
ppm or mg/m
3
Removable / replaceable sensor head
Yes
On-board alarm
Yes
Alarm status displayed
Yes
Low battery indication
Yes
Alarm mute function
Yes
Sensor condition status
Yes
Stand-by mode
Yes
External signal for alarms & control *
(see note below)
12 VDC or switch to
GND (150 mA max)
External signal functions
LoALM, HiALM & Control
Analogue output
0 - 5 V
Power supply
12 VDC or Lithium Smart
Charger
Rechargeable battery pack
9.6V Ni-MH or 11.1V Lithium
Polymer
Portable (with optional battery pack)
Yes
Permanently fixable
Screw fix
Remote Sensor Capability
Yes
* Series 500 & 505 only:
Data interface with PC
Serial RS232
On Board Data Logging
4,300 data points on S500
3,400 data points on S505
Data logging independent of PC
Yes
Data logging direct to PC
Yes
On-board real-time clock
Yes
Data logging software supplied
Yes
* Series 305 & 505 only:
Temperature & Relative Humidity Sensor
Yes