ABB AO2000-LS25, Manual

Page: 49 / 88

AO2000-LS25
LASER ANALYZERS | OI/AO2000-LS25-EN REV. D 49
The fine-tuning procedure is as follows:
1. Connect a voltmeter with a potential-free input (battery
operation) and measure the adjustment voltage of the
receiver unit.
2. Unscrew the 6 stud screws (item
6
in Figure 32 ) until the
ends of the screws no longer stick out of the holes.
3. Carefully adjust the voltmeter display to the maximum value
using the receiver-side adjustment screws (item
5
in
Figure 32 ).
4. Connect a voltmeter with a potential-free input (battery
operation) and measure the adjustment voltage of the
transmitter unit.
5. Carefully adjust the voltmeter display to the maximum value
using the receiver-side adjustment screws (item
5
in
Figure 32 ).
6. Repeat steps 1. to 2. and 3. to 4. until there are no further
improvements in the display of the voltmeter.
7. Tighten the stud screws and check that the alignment has
not changed.
8. Disconnect the voltmeter.
Having completed the previously described operations
successfully, the installation and process parameters need to be
set using a PC to enable correct measurements.
For parameter descriptions, see
Configuration,
parameterization on page 51.
Connecting a PC
The software for service communication with the analyzer is
supplied with the instrument and will run under Microsoft
Windows®. The software does not require any installation.
1. Copy the software supplied to a separate directory named
e.g. “AO2000-LS25” on the hard disk.
2. Connect the PC serial port to the RS-232 connection on the
transmitter unit, see Transmitter unit interface on page 39.
using the supplied serial cable and “gender changer” adapter.
Optionally, a waterproof Phoenix connection cable can be
used instead.
– The service program uses the serial port configured as
9600 baud, no parity, 8 bits and 1 stop bit.
– If network communication is used, connect the network
cable to the Base-T connector on the transmitter unit, see
Transmitter unit interface on page 39. Make sure that
the serial cable must be disconnected from the device.
3. Compare the following parameters with the installation
specifications and set with the software, see Configuration,
parameterization on page 51:
– Process gas pressure and temperature, see Gas pressure
and temperature on page 58.
– Concentration averaging, see Concentration averaging
on page 59.
– Instrument time, see Instrument time on page 60.
– Gas concentration unit, see Unit (Unit) on page 61.
– Optical path parameters, see Optical path through gas
(m) on page 59.
Having completed the setting of all necessary parameters, the
device is in normal operation mode and should indicate this by
updating the gas concentration on the LCD periodically.