Photon Systems Instruments GMS 150 Manual

Page | 3
Manual Version: 2022/07
© PSI (Photon Systems Instruments), spol. s r.o.
www.psi.cz
This document and its parts can be copied or provided to a third party only with the express permission of PSI.
The contents of this manual have been verified to correspond to the specifications of the device. However, deviations cannot be ruled
out. Therefore, a complete correspondence between the manual and the real device cannot be guaranteed. The information in this
manual is regularly checked, and corrections may be made in subsequent versions.
The visualizations shown in this manual are only illustrative.
This manual is an integral part of the purchase and delivery of equipment and its accessories and both Parties must abide by it.

Page | 4
TABLE OF CONTENTS
1Safety Precautions................................................................................................................................. 5
2Technical Specification .......................................................................................................................... 6
3General Description............................................................................................................................... 7
4Components of the GMS 150 Device ..................................................................................................... 8
5Description of the GMS 150 Device ....................................................................................................... 9
6Installation and Operation Protocol .................................................................................................... 10
7Operation Instructions ........................................................................................................................ 12
7.1 Display & Control Menu Screen..................................................................................................................12
7.1.1 Display with Absolute Flow Units ...............................................................................................................13
7.1.2 Display with Percentage Gas Flow Units.....................................................................................................14
7.1.3 Menu Tree ..................................................................................................................................................16
8Quick Guide......................................................................................................................................... 20
8.1 How to Set GMS 150 in Absolute Mode .....................................................................................................20
8.2 How to Set GMS 150 in Percentage Mode .................................................................................................20
9Warranty Terms and Conditions.......................................................................................................... 21
10 Troubleshooting and Customer Support.............................................................................................. 21
11 List of Pictures..................................................................................................................................... 22

Page | 5
1SAFETY PRECAUTIONS
Read this manual carefully before operating the device. If you are not sure about something in the manual, contact the manufacturer for
clarification.
By accepting the device, the customer agrees to follow the instructions in this guide.
GENERAL CAUTIONS:
•Always follow corresponding manuals while working with the Gas Mixing System or doing the maintenance.
•It is forbidden to interfere with the hardware or software of the GMS in any way without previous agreement with the
manufacturer.
•The manufacturer is not responsible for any damage due to improper operation or incompetent operation.
•The manufacturer is not responsible for any damage due to gas leak from any auxiliary units (gas containers, defective valves, etc.).
BEFORE OPERATING THE GMS 150 READ THE FOLLOWING INSTRUCTIONS AND WARNING CAREFULLY:
•To operate a gas handling equipment, you should be trained in its proper use or be under competent supervision.
•The device is primarily intended to mix CO2, N2and air. Mixing of other gasses must be always consulted with manufacturer.
•Pressure regulator must be always used when connecting the GMS 150 with the gas tank. Never connect the gas tank directly
to the GMS 150.
•Do not apply pressure in the gas inputs until the GMS 150 is switched on and fully operational.
•Gas input pressure should be 3 –5 bars. Gas input pressure cannot exceed 8 bars.
•Input gas must be free of oil, water or any other foreign substances.
•If working in wet conditions, dehumidifier must be used to prevent condensation of water in tubes and the system.
•Avoid flooding of the GMS 150 valves by proper device installation and operation. Place the GMS above the cultivation system.
When the GMS is not in operation, disconnect all tubing to avoid back siphoning of liquid for example from humidifier.
•Follow the basic safety rules for work with CO2and other hazardous gases.
•Never heat or expose a gas tank or gas handling equipment to temperatures above 50 °C (120 °F).
GENERAL ELECTRICAL SAFETY GUIDELINES:
•Connect all peripheral units when the device is switched off.
•Routinely check the devices and their wiring.
•Use only cables supplied by the manufacturer.
•Replace worn or damaged cords immediately.
•Use electrical extension cords wisely and do not overload them.
•Place the devices on a flat and firm surface. Keep them away from wet floors and counters.
•Avoid touching the device, socket outlet or switch if your hands are wet.
•Do not perform any alterations to the electrical part of the devices or its components.
The following table presents basic highlight symbols used in this manual:
Symbol
Description
Important information, read carefully.
Complementary and additional information.
Tab. 1 Used symbols.

Page | 6
2TECHNICAL SPECIFICATION
GMS 150
GMS 150-MICRO
Measuring principle
Thermal mass flow measurement
Thermal mass flow measurement
Accuracy (Incl. Linearity)
±0.5 % Rd plus ±0.1 % FS
(±1 % FS for ranges 3 – 5 ml/min; ±2 % FS for
ranges < 3 ml/min)
±1.5 % Rd plus ±0.5 % FS
Turndown
1:187
n.d.
Flow ranges
Max. total flow rate: 2 or 20 l/min typically
(customized max. flow rate between 1 ml/min
–1,000 l/min)
Min. flow rate: 2 % of the max. flow rate
Max. total flow rate: 2 l/min typically
(customized max. flow rate between
10 ml/min –2.5 l/min)
Min. flow rate: 2 % of the max. flow rate
Repeatability
< 0.2 % RD
For flows < 20 ml/min: ±0.5 % FS
For flows > 20 ml/min: ±0.5 % RD
Control stability
< ±0.1 % FS (typical for 1 l/min N2)
n.d.
Settling time
1 –2 seconds
700 msec
Warm-Up time
30 min for optimum accuracy, 2 min for
accuracy ± 2 % FS
30 min for optimum accuracy, 2 min for
accuracy ± 2 % FS
Temperature sensitivity
Zero: < 0.05 % FS/°C; span: < 0.05 % FS/°C
Zero: < 0.01 % FS/°C; span: < 0.02 % FS/°C
Pressure sensitivity
0.1 %/bar typical N2
n.d.
Attitude sensitivity
Max. error at 90° off horizontal 0.2 % at 1 bar,
typical N2
Max. error at 90° off horizontal 0.5 % at 1 bar,
typical N2
Input pressure
3 –5 bars (don’t exceed maximum operation
pressure of 8 bar)
3 –5 bar (don’t exceed maximum operation
pressure of 8 bar)
Operating temperature
+15 to +50 °C
+15 to +30 °C
Input/Output connectors
Parker Prestolok (6 mm)
Parker Prestolok (6 mm)
Seals
Viton
Viton
Display
8 x 21 characters LC display
8 x 21 characters LC display
Power supply
115 –230 VAC
115 –230 VAC
Dimensions
37 cm x 28 cm x 15 cm
37 cm x 28 cm x 15 cm
Weight
7 kg
5 kg
Warranty
1 year parts and labor
1 year parts and labor

Page | 7
3GENERAL DESCRIPTION
Gas Mixing System GMS 150 can produce precise mixtures of up to 4 different gasses. The flows of the individual input gases are measured
by thermal mass flow meters and adjusted by integrated mass flow controllers. Before the exit connector, the gas mixture is thoroughly
homogenized. The input and output gas connectors are Prestolok type allowing fast and secure connection to a variety of tubes.
The GMS 150 can operate gas flows ranging from ml/min to tens of l/min. GMS 150 is typically used to control flow of air, carbon dioxide,
and nitrogen. Additional gases like nitrogen dioxide, ammonia and others can also be added to simulate various technological mixtures
or smokestack gasses.
GMS 150 is available in two versions:
•GMS 150
•GMS 150-MICRO
GMS 150-MICRO retains most features of the GMS 150; the main differences lie in availability of various customized flow ranges, lower
accuracy and limited operating conditions of GMS 150-MICRO (for more technical specifications, see chapter 2).
The typical GMS 150 and GMS 150-MICRO configuration for small-scale Photobioreactors include 2 channels with following flow rates:
Channel 1
Air/N2
40 –2,000 ml/min
Channel 2
CO2
0.8 –40 ml/min
Gas Mixing Systems designed for large scale Photobioreactors are offered in following configurations:
GMS 150/TORA-10L
Channel 1
Air/N2
200 –10,000 ml/min
Channel 2
CO2
8 –400 ml/min
GMS 150/TORA-20L
Channel 1
Air/N2
400 –20,000 ml/min
Channel 2
CO2
16 –800 ml/min
The GMS 150 can be used as a stand-alone instrument or in a system with the Photobioreactors, Multi-Cultivators and FytoScopes. It can
be controlled locally from its front display or by the Photobioreactor Control Software. The required gas mixture can be defined either
in absolute or percentage mode. Absolute mode: the gas mixture is defined via the individual gasses’ flows given in absolute units
(for example 980 ml/min of N2and 20 ml/min of CO2). Percentage mode: the mixture is defined via a relative gas proportion given
in relative unit % or ppm (for example 2% CO2) and via the total gas mixture flow rate in absolute unit (1,000 ml/min).
The side installation requirements for the proper operation of the GMS include pressurized gas sources (air, CO2, N2, etc.)
with the appropriate pressure regulators. Pressurized air used for the GMS must be dry and oil free. The inlet pressure should be in range
of 3 –5 bars for each channel. The accuracy cannot be declared when the pressure is lower than 3 bars.
Please note that inlet pressure exceeding 8 bars causes valve damage.
Should the GMS 150 be used linked with Photobioreactor, Multi-Cultivator or FytoScope, read also instruction
manual for these instruments to connect the GMS with these devices properly.

Page | 8
4COMPONENTS OF THE GMS 150 DEVICE
Standard version of the GMS package consists:
•Gas Mixing System GMS 150 (Fig. 1)
•Cables and Connectors –Power cable, 5 m of Parker Prestolok tubing Ø 6 mm, 3 pieces of blinding plugs (Fig. 2)
•Operation Manual (printed version)
•Optional Accessories (according to your specific order)
If any item is missing, please, contact the manufacturer. Also check the carton for any visible external damage.
If any damage is found, notify the carrier and the manufacturer immediately. The carton and all packing materials
should be retained for inspection by the carrier or insurer.
For customer support, please write to: [email protected].
Fig. 1 GMS 150.
Fig. 2 Cables and blinding plugs.

Page | 9
5DESCRIPTION OF THE GMS 150 DEVICE
Front panel:
Fig. 3 GMS front panel.
1) Two gas inputs. When switched on, the device detects and displays automatically all connected valves. CO2input is connected to valve 1. Air/N2
input is connected valve 2. 2) Four UP/DOWN keys. Each UP/DOWN key controls one particular valve (more on valve control in Chapter 7.1 –Display
& Control Screen). 3) Four control keys for the device setting (more on device setting in Chapter 0 –Setting Screen). 4) Gas output. 5) Display.
GMS 150 can produce precise mixtures of up to 4 different gasses, but standardly there are only two gas inputs.
Rear panel:
Fig. 4 GMS rear panel.
1) Power connector. 2) ON/OFF Main switch. 3) Serial connector. 4) Device serial number.

Page | 10
6INSTALLATION AND OPERATION PROTOCOL
General information:
•Pressurized air and CO2should only be applied to the GMS 150 when the device is on and fully operational.
•The input pressure should be between 3 –5 bars.
•The gas outlet should never be blocked, no pressure should be applied on the gas outlet.
It is necessary to avoid flooding of the GMS 150 valves. The warranty doesn’t cover any damage of the valves
caused by water or moisture. Please, pay attention to this fact as cleaning, repair and recalibration of the valves
are expensive and won’t be covered by warranty.
Place the GMS 150 on the shelf above the associated equipment (Photobioreactor, Multi-Cultivator, i.e.).
When the GMS is not in operation, disconnect all tubing to avoid back siphoning of liquid from humidifier.
How to switch on the GMS:
•Connect all peripheral units when the device is switched off.
•Turn on the device and wait one minute.
•Connect Parker Prestolok tubing to GMS 150 gas inputs and output.
•Connect the tubing with gas sources using pressure regulators.
•Turn on pressurized gas for air and CO2inlets (3 bars each).
•Set appropriate flow rates for each channel on the device.
•Allow the device to equilibrate for 30 min prior to use.
How to switch off the GMS:
•Turn off the pressure for air and CO2inlets and let the system equilibrate.
•Remove the Parker tubing.
•Turn off the device.
To remove Parker tubing from gas output or input, switch off device and hold the rim of connectors for save
removal of the tubing.
An illustrative example of GMS 150 linked with PBR FMT 150:
Recommended set-up includes one GMS 150 linked with one cultivation system (for example PBR FMT 150 unit) as is shown in Fig. 5.
Such a configuration allows to use a full potential of GMS 150:
•Precise and independent regulation of total aeration flow in the individual PBR.
•Independent control of CO2concentration for individual PBR.
•The configuration is a well-tested and problem free set-up.
•The set-up allows to maintain pH at certain level via a feedback regulation of CO2sparging concentration. This function is available
only with FMT 150/MC 1000 Control Software (Advanced License) using JavaScript created by user itself or purchased from PSI.

Page | 11
Fig. 5 GMS 150 connection to Photobioreactor FMT 150 cultivation unit.
Mixed gas of given composition is pumped from GMS (1) to the PBR FMT 150 (2) via air interruption valve (3), filter (4) and humidifier (5). Aeration gas
is led through the cultivation vessel lid into the U-tube sparger. Medium overflow is collected using the medium outlet (6).

Page | 12
7OPERATION INSTRUCTIONS
The device is operated and controlled via two different screen-modes of the digital display:
1. Display & Control Screen –values for actual flow, target flow and output mixture flow of the gases are shown (Fig. 6 A).
2. Setting Screen - menu tree is shown (Fig. 6 B).
To change between these two modes:
•Use the Skey (below the digital display) to switch from the Display & Control Screen to the Setting Screen.
•Use the Mkey (below the digital display) to return from the Setting Screen to the Display & Control Screen.
Fig. 6 A) Display & Control Screen. B) Setting Screen.
7.1 DISPLAY &CONTROL MENU SCREEN
•Use the S key (below the digital display) to switch from the Display & Control Screen to the Setting Screen.
•Use the Mkey (below the digital display) to return from the Setting Screen to the Display & Control Screen.
•The Display & Control Screen shows the actual, current gas flow as well as the target flow values for each installed valve. These
values can be displayed either in absolute gas flow units (ml/min or ln/min) or in percentage units (% or ppm) which specifies
relative contents of the given gas in the output gas mixture.
•The absolute or percentage units can be selected in the Setting Screen →Use the Skey to switch from Display & Control Screen
to the Setting Screen. Use UP/DOWN keys situated below the screen and select Mode in the menu tree. Use the Skey again
to switch between absolute mode and percentage mode.
•The target values for the single valves are set by four UP/DOWN keys situated at both sides of the screen. The keys are used
to change actual gas flow in corresponding valves (UP/DOWN = add/subtract). The keys are numbered 1 –4 (see the picture
below Fig. 7 ).
Fig. 7 UP/DOWN keys.

Page | 13
7.1.1 DISPLAY WITH ABSOLUTE FLOW UNITS
Fig. 8 Display with absolute flow units.
Values for current flow
•The current flow values for gases used are shown on the top of the display, on left side is usually current gas flow for CO2,
on the right side is usually current gas flow for Air/N2(Fig. 8).
•N/A means that this gas is not available.
If the current value is different from the target value in range larger than set tolerance value (“Tol”.) the number
of current gas flow is flickering. “Tol” is user-defined tolerance. You can set this tolerance value in menu → Press
Skey (below the digital display) to switch from the Display & Control Screen to the Setting Screen. Use ↕keys
for moving in menu and press S key on option Warn. Use ↕keys to the required value (for example 10 %) a press
Skey to confirm.
Values for target flow
•The target flow value can be adjusted by using the corresponding UP/DOWN key (numbered 1, 2, 3, 4 on sides of display).
The maximum setting range is limited by used valve (usually 2,000 ml). Information about valve you can find in menu → Press Skey
(below the digital display) to switch from the Display & Control Screen to the Setting Screen. Use ↕keys for moving in menu
and press Skey on option Val. info.
•The absolute gas flow units are either liters per minute (l/min) or milliliters per minute (ml/min). You cannot set the flow rate
below 2 % of maximum valve.
•In some Gas Mixing Systems, the valve control keys on the front panel are not labelled with the particular gas type. Instead, labels
Valve 1 –4 are used and gas type can be shown on display. To display the gas type on the screen → Press Skey (below the digital
display) to switch from the Display & Control Screen to the Setting Screen. Use ↕keys for moving in menu and press S key
on option Gases → Valve X.
The mass flow meters are calibrated for a particular gas type. The reading may be incorrect if a different,
non-compatible gas is used.
Output mixture flow
It shows absolute air flow on the valves used. The absolute target flow is computed as a sum of flow on each individual valve (Fig. 8).
Example from Fig. 8: 27.99 ml/min of CO2+ 1.480 l/min Air = 1.508 l/min.

Page | 14
7.1.2 DISPLAY WITH PERCENTAGE GAS FLOW UNITS
Fig. 9 Display with percentage gas flow units.
Current percentage content
•The current flow values for gases used are shown on the top of the display, on left side is usually current gas flow for CO2,
on the right side is usually current gas flow for Air/N2(Fig. 9).
•N/A means that this gas is not available.
If the current value is different from the target value in range larger than set tolerance value (“Tol”.) the number
of current gas flow is flickering. “Tol” is user-defined tolerance. You can set this tolerance value in menu → Press
Skey (below the digital display) to switch from the Display & Control Screen to the Setting Screen. Use
UP/DOWN keys for moving in menu and press Skey on option Warn. Use UP/DOWN keys to set the required
value (for example 10 %) a press Skey to confirm.
Target percentage content
•The target flow value can be adjusted by using the corresponding
UP/DOWN key (numbered 1, 2, 3, 4 on sides of display).
The maximum setting range is limited by used valve (usually 2 l).
Information about valve you can find in menu → Press Skey (below
the digital display) to switch from the Display & Control Screen to
the Setting Screen. Use UP/DOWN keys for moving in menu and
press Skey on option Val. Info.
•The percentage gas content units are either parts per million (ppm)
or percents (%). Sum of percent has to be 100 % (for example
2 % CO2and 98 % Air). You cannot set the ratio, which corresponds
to the minimal flow rate to 2 % of maximum valve –an error
message appears (see image Fig. 10).
•In some Gas Mixing Units, the valve control keys on the front panel
are not labeled with the particular gas type. Instead, labels Valve
1 –4 are used and the gas type can be shown on display. Displaying
the gas type can be achieved through the Setting Screen →Gases
option →Valve X.
The mass flow meters are calibrated for a particular gas type. The reading may be incorrect if another gas is used.
Fig. 10 Error message.

Page | 15
Output mixture flow
•The total flow of the gas mixture is determined by the instrument so that the percentage gas content is adjusted with a maximum
accuracy. The user can optimize gas mixture flow using the Setting Screen →Press Skey (below the digital display) to switch from
the Display & Control Screen to the Setting Screen. Use UP/DOWN keys for moving in menu and press Skey on option ∑Flow. Use
UP/DOWN keys to set the required value (for example 0.030 l/min –see Fig. 11) and press Skey to confirm. This function is
available only for Percentage Gas Flow Units (not for Absolute Gas Flow Units).
If the gas flow is too low (for example setting our of the range, blocked tubes or source of gas is empty) the display
shows an exclamation mark ! (see picture below Fig. 11). Be aware that in this case an optimal gas mixing
precision cannot be granted.
Fig. 11 Exclamation mark.
IMPORTANT REMARKS:
•The percentage content of CO2in the output mixture is set as described above when mixed with N2. However, when CO2is added
to air that contains, for example, 380 ppm of CO2, the target value is added to the offset of 380 ppm. The offset CO2concentration
in the air can vary depending on the air source and, also, some of the air sources can have changing CO2content, e.g. during the
day and night.
•The correction for the CO2concentration in the air can also be done automatically if the local CO2level is specified in the Setting
Screen →CO2/Air.

Page | 16
Setting Menu Screen
•The Setting Screen is operated by the M, Sand UP/DOWN keys situated below the screen (see the picture below, Fig. 12).
•Use the Skey to switch from the Display & Control Screen to the Setting Screen and to confirm change in the menu tree or to save
the selected value (parameter).
•Use the Mkey to return from the Setting Screen to the Display & Control Screen and to move back in the main menu or to exit.
•Use the UP/DOWN key to add/subtract the desired value or to move up/down in the menu tree.
Fig. 12 Setting Screen –main menu and keys for operating the menu.
7.1.3 MENU TREE
Gases > Valve X (Fig. 13)
Use this option to change the gas type for selected valve. Only compatible gases are shown in selection. Usually you see valve 1 (CO2)
and valve 2 (Air).
Fig. 13 Menu Tree –Gases.

Page | 17
Dev. Info (Fig. 14)
This option specifies the device type, firmware version, firmware date, name and build number. Press Skey (below the digital display) to
switch from the Display & Control Screen to the Setting Screen. Use UP/DOWN keys for moving in menu and press Skey on option
Device Info.
Fig. 14 Menu Tree –Device Info.
Warn
Use this option to set tolerance range (tolerated difference between the target and actual values). Use UP/DOWN key to set the required
value. If the current value is different from the target value in range larger than set tolerance value (“Tol”.) the number of current gas
flow is flickering. “Tol” is user-defined tolerance. You can set this tolerance value in menu → Press Skey (below the digital display)
to switch from the Display & Control Screen to the Setting Screen. Use UP/DOWN keys for moving in menu and press Skey on option
Warn. Use UP/DOWN keys to the required value (for example 10 %) a press Skey to confirm.
CO2/Air
Use this option to define the offset CO2concentration in the air source. Press Skey (below the digital display) to switch from the Display
& Control Screen to the Setting Screen. Use UP/DOWN keys for moving in menu and press Skey on option CO2/Air. Use UP/DOWN key
to set the required CO2concentration and hold Skey to confirm.
Valve Init
Use this option to specify whether valves are initialized to last known target flow or shut (zero flow). Use UP/DOWN key to set the LAST
or SHUT option and confirm by Skey.

Page | 18
Valve Info (Fig. 15)
This option displays information about the installed valves (number of inputs, condition, valve type, maximum flow).
Fig. 15 Menu Tree –Valve Info.
Mode
This option is used to switch between absolute and percentage flow mode. Press S key (below the digital display) to switch from the
Display & Control Screen to the Setting Screen. Use UP/DOWN keys for moving in menu and press Skey on option Mode. Use UP/DOWN
key to set the absolute or percentage mode and press Skey to confirm.
∑Flow
This option is active only when the percentage mode for gas mixture flow is used. It is used to modify the total output flow of the gas
mixture. The user can optimize gas mixture flow using the Setting Screen →Press Skey (below the digital display) to switch
from the Display & Control Screen to the Setting Screen. Use UP/DOWN keys for moving in menu and press Skey on option ∑Flow. Use
UP/DOWN keys to set the required flow value, and press Skey to confirm.
Should the total output flow be set out of the valve’s flow range (< 2 % and/or > 100 %), an error message appears (Fig. 10). Also, an
exclamation mark appears before the value (Fig. 11).
This function is available only for percentage mode (not for absolute mode).

Page | 19
Fig. 16 Main menu.

Page | 20
8QUICK GUIDE
8.1 HOW TO SET GMS 150 IN ABSOLUTE MODE
•Press Skey to switch from the Display & Control Screen to the Setting Screen.
•Use UP/DOWN keys for moving in menu and press Skey on option Mode. Use UP/DOWN key to set the absolute mode and press
Skey to confirm.
•Use the Mkey to return from the Setting Screen to the Display & Control Screen.
•The target values for the single valves are set by four UP/DOWN keys situated at both sides of the screen. The keys are used to
change actual gas flow in corresponding valves (UP/DOWN = add/subtract). The keys are numbered 1 –4 (see the picture Fig. 12).
•Example from Fig. 17:
Valve 1 –CO2–set target flow of 28.00 ml/min
Valve 2 –Air –set target flow of 1.480 l/min
The absolute target flow is automatically computed as a sum of actual valves flows:
28.00 ml/min of CO2+ 1.480 l/min Air = 1,508 ml/min = 1.508 l/min.
Fig. 17 Display in absolute mode.
8.2 HOW TO SET GMS 150 IN PERCENTAGE MODE
•Press Skey to switch from the Display & Control Screen to the Setting Screen
•Use UP/DOWN keys for moving in menu and press Skey on option Mode. Use UP/DOWN key to set the percentage mode
and press Skey to confirm.
•Use the Mkey to return from the Setting Screen to the Display & Control Screen.
The target values for the single valves are set by four UP/DOWN keys situated at both sides of the screen. The keys are used
to change actual gas flow in corresponding valves (UP/DOWN = add/subtract). The keys are numbered 1 –4 (see the picture Fig.
18).
•The total flow of the gas mixture is determined by the instrument so that the percentage gas content is adjusted with a maximum
accuracy. The user can optimize gas mixture flow using the Setting Screen →Press Skey (below the digital display) to switch from
the Display & Control Screen to the Setting Screen. Use UP/DOWN keys for moving in menu and press Skey on option ∑Flow. Use
UP/DOWN keys to set the required value (for example 1.493 l/min –see Fig. 18) a press Skey to confirm. This function is available
only for Percentage Gas Flow Units (not for Absolute Gas Flow Units).
•Example from Fig. 18:
Valve 1 –CO2–set target flow of 2 %
Valve 2 –Air - target flow 98 % - automatically calculated
The target total flow set in the menu: 1.493 l/min.
Fig. 18 Display in percentage mode.