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Communication Port
Calibration Gas Inlet
DC-adapter
For the records, it is possible to download to a PC all logged data for the last 8 hours TWA
period. A special communication cable is required (accessory), plus the free software UIP-P.
This connection can be done in OFF Mode during battery charging, as well as during normal
operation in ON or CALb Modes, with or without any battery charger connected.
Charging of the Battery
Charging of the battery can be done with the unit in Off-, CALb- or On Mode. The electronic
circuitry gets activated by charging also in Off Mode, but will return to initial off state when
disconnected. When the DC- adapter is connected the charging of the battery is indicated by
the rolling battery icon. When the battery is fully charged the battery icon is lit continuously.
The C1100 unit automatically stops charging when the battery is fully charged.
The charging time for a completely discharged battery is 4
±
1 hours and the battery capacity is
more than 12 hours of operation.
Figure 3. Connections
Self Diagnostics and Calibration
The
C 1100 is basically maintenance free. The system contains a complete self-diagnostic
routine, which is executed automatically every time the power is turned on. The unit will then
perform a full self-test sequence showing the LEDs and buzzer response for the alarm
setpoints
.
C 1100 is working with continuous self-diagnostics during operation (On Mode). If
any error is detected the Status Indicator Segment will be lit
.
The sensor has an automatic calibration function to secure long-term accuracy. It's called
Automatic Baseline Calibration (ABC), implemented to eliminate any zero point drift of the
infrared sensor. ABC calibration cycles are performed in 4 hours intervals. During some
minutes of that time fresh air (CO
2
concentration between 380-420 ppm) has to be present.
ABC function is only active in "CALb Mode" (after one hour delay) and requires 1 to 5 hours
to perform one calibration adjustment. Each such adjustment is limited to a fine-tuning of
0,01% CO
2
. Several consecutive adjustments might be performed, if required, for each
additional 4 hours period stay in “CALb Mode”.
The CALb Mode is intended for overnight charging in an area with good ventilation, or close
to the fresh air inlet.
