BOREAL LASER GasFinder2, Operation Manual

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5.5
Boreal Laser Inc. GasFinder2 Operation Manual — Operating Instructions July 17th 2017
13. 4-20mA Current Loop Settings : this submenu allows the
user to confi gure the 4-20mA current loop option.
a) 4mA ppmm Set Point : Sets the value in ppmm which
corresponds to a loop current of 4mA.
b) 20mA ppmm Set Point : Sets the value in ppmm which
corresponds to a loop current of 20mA.
c) 4-20mA enable : Enables or disables the 4-20mA current
loop output.
Note : The 4-20mA option is not available for Gas B in a
dual gas system.
14.
Log to Memory Menus: this submenu enables the GasFinder2
to be used as a data logger. The storage capacity is 131,072
samples. Recording a data point every second will give over
36 hours of recording. If the average is set to one minute
using the
Average Window set to 58, then the recording time
is nearly 3 months.
For a dual gas system, recording times will be halved.
a)
Wrap
The data can be stored in the buffer in a wrap mode where
data overwrites the initial records when the memory is full.
Only the latest data is recorded.
b)
Fill
Alternatively, if the fill mode is used, the data will fill the
buffer and once full no new data will be captured.
Downloading
The buffer can be downloaded to a computer using GasViewOP
or a terminal program such as Hyperterminal.
For a large
download the baud rate on both the GasFinder2 and the computer
should be set to a high value in order to keep the memory download
time to a reasonable level.
Powering Off
Powering off the GasFinder2 off does not erase the data. The
data log is only cleared using Clear Log in the Log Menus
option. For more detailed instructions on using the Log Menus
options, see Appendix I.
Log Memory Menus
Enter
4-20mA Current Loop
Settings