= Gas Refill Instructions

== Figures
=== Figure 1 - System Settings #fig-1
[[Image(01-gas-refill-system-settings.png, nolink)]]

=== Figure 2 - Monitor & Control #fig-2
[[Image(02-gas-refill-monitor-control.png, nolink)]]

=== Figure 3 - Refill Laser Procedure is Selected #fig-3
[[Image(03-gas-refill-laser-procedure.png, nolink)]]

=== Figure 4 - Laser, Gas Refill Box #fig-4
Laser box:
  * Temperature - the first number shows lidar internal ambient air temperature and the number in brackets () shows the temperature of electronics,
  * Energy (uJ) – laser pulse energy, Pressure (kPa) – laser gas pressure.

Gas Refill System box:
  * Cylinder (kPa) – internal fresh gas cylinder pressure before the pressure regulator
  * Lidar (kPa) – internal ambient pressure of lidar hull

[[Image(04-gas-refill-temp-pressure.png, nolink)]]

=== Figure 5 - Gas refill system pipes are cleaned. Preparation for laser chamber pumping #fig-5
[[Image(05-gas-refill-pipes-cleaned.png, nolink)]]

=== Figure 6 - Old gas is pumped out from laser #fig-6
[[Image(06-gas-refill-old-gas-removal.png, nolink)]]

=== Figure 7 - Old gas is pumped out from laser #fig-7
[[Image(07-gas-refill-old-gas-removal.png, nolink)]]

=== Figure 8 - Cylinder is working. Laser chamber pressure is almost 0 #fig-8
[[Image(08-gas-refill-cylinder-working.png, nolink)]]

=== Figure 9 - Cylinder is opened #fig-9
[[Image(09-gas-refill-cylinder-open.png, nolink)]]

=== Figure 10 - Laser chamber is filled with fresh gas from cylinder #fig-10
[[Image(10-gas-refill-fresh-gas.png, nolink)]]

=== Figure 11 - Gas cylinder is closing #fig-11
[[Image(11-gas-refill-cylinder-close.png, nolink)]]

=== Figure 12 - Pressure is stablilized before and after the gas cylinder pressure regulator #fig-12
[[Image(12-gas-refill-pressure-stable.png, nolink)]]

=== Figure 13 - Gas refill finished#fig-13
[[Image(13-gas-refill-finished.png, nolink)]]

=== Figure 14 - Internal Storage, monitorlog.txt #fig-14
[[Image(14-gas-refill-internal-storage.png, nolink)]]

=== Figure 15 - Time From Last Gas refill in seconds and LaSeR Pulses From Last Gas refill #fig-15
[[Image(15-gas-refill-last-refill.png, nolink)]]

=== Figure 16 - Clean Water Signal Example #fig-16
Peak on the left is Raman scattering signal. Broad shape on the right is Dissolved Organic Matter (DOM) fluorescence.

[[Image(16-gas-refill-clean-water-signal.png, nolink)]]