ABB SCC-E User manual

AnalyzeIT
Continuous Gas Analyzers – Sample Conditioning
SCC-E Sample Gas Feed Unit
Operator’s Manual 42/2358 EN Rev. 1
SCC-E

2 SCC-E Sample Gas Feed Unit Operator’s Manual 42/23-58 EN Rev. 1
Contents
Page
Preface 3
General Safety Information 4
Safety Tips for Handling Electronic Measurement Devices 5
Chapter 1 Preparing the Installation
Normal Operation 6
Requirements for the Installation Site 6
Power Supply 7
Sample Gas Inlet Conditions 7
Scope of Delivery 7
Dimensional Drawing 8
Chapter 2 Sample Gas Feed Unit Installation
Installing the Sample Gas Feed Unit 9
Connecting the Sample Gas Pipes 10
Connecting the Electrical Cables 11
Chapter 3 Sample Gas Feed Unit Start-Up
Power Supply and Sample Gas Activation 12
Sample Gas Pump Control 13
Cooler Control 13
Chapter 4 Maintenance
Replacing the Condensate Pump Hose 14
Replacing the Condensate Pump Pressure Rollers and Springs 16
Replacing the Diaphragm and Valve Plates in the Diaphragm Pump 18
Checking the Gas Paths for Leaks 21
Troubleshooting 22
Chapter 5 Shutting Down and Packing the Feed Unit
Shutting Down the Feed Unit 23
Packing the Feed Unit 23
Appendix
Description 24
Circuit Diagrams 25

42/23-58 EN Rev. 1 SCC-E Sample Gas Feed Unit Operator’s Manual 3
Preface
Contents of this
Operator’s Manual
This operator’s manual contains all the information you need to install, commission,
operate and maintain the SCC-E sample gas feed unit safely and in accordance
with the regulations.
This operator’s manual contains information on all the function units of the sample
gas feed unit. It is possible that the sample gas feed unit that you have been
supplied with could differ from the model described here.
Additional Document Specification Sheet “System Components and Accessories for Sample Gas
Conditioning”, Document No. 10/23-5.20 EN
This publication can be ordered from your authorized ABB representative or from
ABB Automation Products GmbH, Analytical Division, Marketing Communication,
Fax: [phone], E-mail: [email protected]
Further Details
on the Internet
You can find further information on ABB Analytical products and services on the
internet: “http://www.abb.com/analytical”.
Identifies safety information to be heeded during unit operation
in order to avoid risks to the operator.
Identifies specific information on operation of the unit as well as
on the use of this manual.
Symbols and
Typefaces
1, 2, 3, ... Identifies reference numbers in the figures.
This operator’s manual is protected by copyright. The translation, duplication and distribution in any form,
even in a revised edition or in extracts, in particular as a reprint, by photomechanical or electronic repro-
duction or in the form of storage in data processing systems or data networks are prohibited without the
consent of the copyright holder and will be prosecuted under civil and criminal law.

4 SCC-E Sample Gas Feed Unit Operator’s Manual 42/23-58 EN Rev. 1
General Safety Information
Requirements for
Safe Operation
In order to operate in a safe and efficient manner the unit should be properly
handled and stored, correctly installed and started, properly operated and
carefully maintained.
Personnel
Qualifications
Only persons familiar with the installation, set-up, operation and maintenance of
comparable equipment and certified as being capable of such work should work
on the unit.
Important Notes and
Regulations
It is important to comply with:
•The content of this operator’s manual
•The safety information affixed to the unit
•The applicable safety precautions for installing and operating electrical devices
•Safety precautions for working with gases, acids, condensates, etc.
National Regulations The regulations, standards and guidelines cited in this operator’s manual are
applicable in the Federal Republic of Germany. The applicable national regulations
should be followed when the unit is used in other countries.
Unit Safety and
Safe Operation
The unit is designed and tested in accordance with EN 61010 Part 1, “Safety
Provisions for Electrical Measuring, Control, and Laboratory Instruments” and has
been shipped ready for safe operation.
To maintain this condition and to assure safe operation, read and follow the safety
information identified with the symbol in this manual. Failure to do so can put
persons at risk and can lead to unit damage as well as damage to other systems
and instruments.
Additional
Information
If the information in this manual does not cover a particular situation, ABB Service
is prepared to supply additional information as needed.
Contact your local ABB service representative or
ABB Service, Telephone: [phone], Fax: [phone],
E-mail: callcenter[email protected]

42/23-58 EN Rev. 1 SCC-E Sample Gas Feed Unit Operator’s Manual 5
Safety Tips for Handling Electronic Measurement Devices
Protective Lead
Connection
The protective lead should be attached to the protective lead connector before
any other connection is made.
Risks of Loss of
Protective Lead
Continuity
The unit can be hazardous if the protective lead is interrupted inside or outside the
unit or if the protective lead is disconnected.
Proper Operating
Voltage
The unit voltage must be set to match the line voltage before the power supply is
activated.
Risks Involved in
Opening the Covers
Current-bearing components can be exposed when the covers or parts are
removed, even if this can be done without tools. Current can be present at some
connection points.
Risks Involved in
Working with an
Open Unit
The unit must be disconnected from all power sources before any maintenance
work is performed. Work on a unit that is open and connected to power should
only be performed by trained personnel who are familiar with the risks involved.
Charged Capacitors The unit capacitors can retain their charge even when the unit is disconnected
from all power sources.
Use of Proper Fuses Only fuses of the specified type and rated current should be used as replacements.
Never use patched fuses. Do not short-circuit the fuse holder contacts.
When Safe Operation
can no Longer be
Assured
If it is apparent that safe operation is no longer possible, the unit should be taken
out of operation and secured against unauthorized use.
The possibility of safe operation is excluded:
•If the unit is visibly damaged
•If the unit is no longer operational
•After prolonged storage under adverse conditions
•After severe transport stresses.

6 SCC-E Sample Gas Feed Unit Operator’s Manual 42/23-58 EN Rev. 1
Chapter 1 Preparing the Installation
Normal Operation
Normal Operation The SCC-E sample gas feed unit is designed for continuous dosed sample gas
feeding.
The SCC-E sample gas feed unit with Peltier cooler is additionally designed for
cooling the sample gas and separating and removing the condensate.
The SCC-E sample gas feed unit must not be used
•for feeding mixtures of gas/air or gas/ oxygen that are capable of ignition during
normal service,
•for feeding flammable gas, which can combine with air or oxygen to form an
ignition-capable mixture, or
•in a potentially explosive atmosphere or in hazardous areas.
Requirements for the Installation Site
Short Gas Feed Paths The sample gas feed unit should be installed as close as possible to the gas
analyzer.
Adequate
Air Circulation
Ensure adequate natural air circulation around the sample gas feed unit. Avoid
heat accumulation.
Protection against
Adverse
Environmental
Conditions
The sample gas feed unit should be protected from
•Cold,
•Radiated heat, e.g. from the sun, kilns or boilers,
•Temperature fluctuations,
•Strong air movement,
•Dust deposits and dust penetration,
•Corrosive atmosphere,
•Vibration.
Climatic Conditions Ambient temperature In operation: +10 to +45 °C
During Storage and transport: –25 to +60 °C
Relative humidity ≤75 % year-round average, ≤95 % on 30 days per
year, occasional light condensation permissible

42/23-58 EN Rev. 1 SCC-E Sample Gas Feed Unit Operator’s Manual 7
Power Supply
Power Supply Input voltage 230 VAC, 50 Hz or 115 V AC, 60 Hz
Power consumption 230 V AC, 50 Hz: 1.05 A, 240 VA
Sample Gas Inlet Conditions
Sample Gas Inlet
Conditions
Sample gas pressure pabs = 70 to 105 kPa (0.7 to 1.05 bar)
Sample gas flow 7 to 70 l/h
Sample gas inlet temperature +10 to +50 °C
Sample gas inlet dew point Version without cooler: The dew point of the sample
gas must be at least 5 °C lower than the lowest
ambient temperature anywhere in the sample gas
feed path. If this is not the case, then a sample gas
cooler unit or a condensate trap is required.
Version with Peltier cooler: max. 50 °C
Scope of Delivery
Quantity Description
1 SCC-E Sample Gas Feed Unit
2 Operator’s Manuals (1 copy in German, 1 in English)
Scope of Delivery
1 Diaphragm Pump Spare Parts Set
The mounting brackets are fitted in the factory.

8 SCC-E Sample Gas Feed Unit Operator’s Manual 42/23-58 EN Rev. 1
Dimensional Drawing
Fig. 1
Dimensional Drawing
(Dimensions in mm)
3.0
SCC-E
Te s t G a s
Sample Gas
Alarm Pump
248 36
17,5 185
220
372,5
30025 47,5
37,75 101,5
10
7
246
1
7
7
263
220
89
10
5
7
11
6
1
2
3
4
12
13
1Sample gas inlet
2Test gas inlet
3Sample gas outlet
4Power supply and status signal cables
5Flow meter with needle valve
6Peristaltic pump 1)
7Condensate monitor 1) /diaphragm filter
8Red LED indicator “condensate alarm” 1)
9Pump switch
10 Temperature controller for cooler 1)
11 3-way cock “sample gas/test gas”
12 Condensate outlet 1)
13 4 x M5 threaded holes in ground plate
1) only in version with Peltier cooler and condensate pump
•You should allow for the additional space required for the cooling air inlet on the
left side of and above the unit.
•The mounting brackets are fitted in the factory, with about 2.5 cm projection to
the rear wall.
•Slope max. 5°.

42/23-58 EN Rev. 1 SCC-E Sample Gas Feed Unit Operator’s Manual 9
Chapter 2 Sample Gas Feed Unit Installation
•If there is shipping damage which points to improper handling, file a damage
claim with the shipper (railway, mail or freight carrier) within seven days.
•Make sure that none of the enclosed accessories are lost during unpacking (see
section “Scope of Delivery”, page 7).
•Keep the shipping box and packaging material for future shipping needs.
Installing the Sample Gas Feed Unit
Step Action
Mount the sample gas feed unit on the wall using 4 M6 screws (not
supplied). The mounting brackets required for this purpose are
mounted on the rear of the side panels in the factory.
1
To enable the cooling air to pass unobstructed out of the
sample gas feed unit to the rear, the projection of the mounting
brackets of around 2.5 cm to the rear wall, which is set up in
the factory, must not be reduced.
2 If necessary, remove the condensate outlet hose from the peristaltic
pump and pull it out backwards.
Install the
Sample Gas Feed Unit
on the Wall
3 If necessary, remove the handle and close the threaded holes.
Step Action
1 Unscrew the mounting brackets from the rear of the side panels and
screw them securely at the front of the side panels, flush with the front
panel, using the threaded holes provided for this purpose.
Exchange the fittings flange on the case cover with the blank flange
on the rear wall.
2
Take care not to bend or squash any hoses.
3 If necessary, remove the handle and close the threaded holes.
4 If necessary, remove the adhesive pads from the bottom.
Install the
Sample Gas Feed Unit
in a 19-inch
Cabinet/Rack
5 Mount the feed unit in a 19-inch cabinet/rack using 4 M5 screws.
Step Action
1 Unscrew the mounting brackets from the rear of the side panels.
If necessary, exchange the fittings flange on the case cover with the
blank flange on the rear wall.
Desktop Installation
2
Take care not to bend or squash any hoses.

10 SCC-E Sample Gas Feed Unit Operator’s Manual 42/23-58 EN Rev. 1
Connecting the Sample Gas Pipes
Fig. 2
Gas Connections
(View from above)
Sample
Gas In
Sample
Gas Out
Tes t
Gas In
Gas Connections The gas connections are PPH screw connections for DN 4/6 mm hose.
Connect Gas Pipes Connect the gas pipes to the gas inlets and outlet. The gas pipes should be made
from material that is suited to the measuring task.

42/23-58 EN Rev. 1 SCC-E Sample Gas Feed Unit Operator’s Manual 11
Connecting the Electrical Cables
CAUTION!
Follow all applicable national safety regulations for the installation and
operation of electrical devices as well as the following safety precautions.
The sample gas feed unit voltage must be set to match the line voltage
before the power supply is connected (see rating plate).
The protective lead should be attached to the protective lead connector
before any other connection is made.
The sample gas feed unit can be hazardous if the protective lead is inter-
rupted inside or outside the feed unit or if the protective lead is disconnected.
You should route the signal lines separately from the power supply lines.
Connecting
the Signal Lines
The signal lines (status signal of flow monitoring and – in the version with Peltier
cooler – condensate monitoring and cooler temperature) should be connected in
accordance with the wire numbering (see Fig. 3).
Fig. 3
Signal Lines
2 C
3 NO
1 N
C
Step Action
Make sure the voltage setting shown on the rating plate
matches the line voltage.
1
The operating voltage cannot be switched over.
2 Make sure the power supply leads have an adequately dimensioned
protective device (breaker).
3 Install either a mains disconnector in the power supply wiring or a
switched socket, in either case close to the sample gas feed unit. This
should allow the sample gas feed unit to be completely disconnected
from the power supply if necessary.
The mains disconnector should be identified in such a way that its
relationship to the equipment that it is designed to disconnect can be
clearly seen.
Connect the power supply leads to the power supply.
Connecting
the Power Supply
4
The sample gas feed unit may start when the power supply is
connected.

12 SCC-E Sample Gas Feed Unit Operator’s Manual 42/23-58 EN Rev. 1
Chapter 3 Sample Gas Feed Unit Start-Up
Power Supply and Sample Gas Activation
CAUTION!
Before activating the power supply check once again that the operating
voltage setting (see rating plate) matches the line voltage.
CAUTION!
The needle valve must never be closed completely.
Step Action
1 Activate the power supply.
2 The sample gas feed unit is ready for operation without delay.
3 The sample gas must not be switched on until the upstream cooler
unit’s lead time has finished.
Version
without Cooler:
Power Supply and
Sample Gas Activation
4 Set the sample gas flow using the needle valve (max. 70 l/h).
Step Action
1 Activate the power supply.
2 The condensate pump starts to run.
3 The lead time is approx. 10 minutes.
4 The flow alarm and the cooler temperature alarm are present during
the lead time. The condensate alarm may also be present.
5 The lead time is finished and the sample gas feed unit is ready for
operation when the sample gas outlet temperature of the Peltier
cooler is within the factory-set limit values (“K1” LED on the tem-
perature controller lights up yellow). The sample gas pump starts to
run if the “Pump” push-button is pressed (lights up green).
6 The sample gas may be switched on.
Version
with Peltier Cooler:
Power Supply and
Sample Gas Activation
7 Set the sample gas flow using the needle valve (max. 70 l/h).

42/23-58 EN Rev. 1 SCC-E Sample Gas Feed Unit Operator’s Manual 13
Sample Gas Pump Control
Operation The “Pump” push-button must always be pressed during operation (lights up
green).
The sample gas pump can be switched off with the push-button, e.g. for mainte-
nance work.
Alarm
(only in the Version
with Peltier Cooler)
The sample gas pump is switched off when
•a condensate alarm (“Alarm” LED next to the “Pump” push-button lights up red)
or
•a cooler temperature alarm (“K1” LED on the temperature controller is off)
is present. The “Pump” push-button continues to light up green.
Cooler Control
Indication LED K1 LED K2
After start-up > 5 °C
(room temp.)
Off (status alarm + pump off) Lights up constantly yellow (cooling)
After lead time end
(approx. 10 min)
≤5,5 °C Lights up yellow (status alarm
switches to “good” state)
Lights up constantly yellow (cooling)
Normal operation 3° C Lights up yellow Blinks (cooler regulation)
> 3,5 °C Lights up yellow Lights up constantly yellow (cooling)Cooler overloaded
> 5 °C Off (status alarm + pump off) Lights up constantly yellow (cooling)
< 2,5 °C Lights up yellow OffAmbient temperature
too low < 0 °C Off (status alarm + pump off) Off
See section “Troubleshooting” for further information on cooler problems (see
page 22).

14 SCC-E Sample Gas Feed Unit Operator’s Manual 42/23-58 EN Rev. 1
Chapter 4 Maintenance
CAUTION!
The operations described in this chapter require specialized knowledge, and
sometimes involve the necessity of working on the sample gas feed unit with
its cover open and live. They must therefore only be carried out by qualified
and specially trained persons.
Replacing the Condensate Pump Hose
When does the hose
need to be replaced?
Depending on the operating cycle, the condensate pump hose should be replaced
at least every 5 months.
CAUTION!
Never lubricate the condensate pump hose.
Step Action
1
Stop the sample gas supply and shut off the feed unit power
supply.
Remove the old hose:
2 Using the handles, press the moving belt 1together and turn the S-
clip 2in a clockwise direction as far as its limit stop.
3 Remove the moving belt 1from the pump head and pull the old hose 3
by the hose connections 4to release it from the moving belt’s guides.
4 Press the pressure rollers 5together and check the spring pressure; if
it is too weak, then the pressure springs and possibly rollers should
be replaced (see p. 16).
Fit a new hose:
5 Insert a new hose 3with hose connections in the guides on the
moving belt 1.
6 Insert moving belt 1with the new hose in the dovetail guide 6in the
pump head; using the handles, press the moving belt together while at
the same time turning the S-clip 2counterclockwise until it engages.
Start the feed unit again:
7 Switch on power supply to feed unit.
Replace Condensate
Pump Hose
(see Fig. 4)
8 The sample gas flow should only be restarted after the lead time
period.
Continued on next page

42/23-58 EN Rev. 1 SCC-E Sample Gas Feed Unit Operator’s Manual 15
Replacing the Condensate Pump Hose, continued
Fig. 4
Condensate Pump,
Hose and Pump Head
with Roller Mounting
1
2
1
3
4
5
6
1Moving belt
2S-clip
3Hose
4Hose connections
5Pressure rollers
6Dovetail guides

16 SCC-E Sample Gas Feed Unit Operator’s Manual 42/23-58 EN Rev. 1
Replacing the Condensate Pump Pressure Rollers and Springs
When do the pressure
rollers and springs
need to be replaced?
The pressure rollers in the condensate pump must be replaced when their surface
is damaged.
The pressure springs in the condensate pump must be replaced when they are
broken.
Step Action
1
Stop the sample gas supply and shut off the feed unit power
supply.
Remove the hose:
2 Using the handles, press the moving belt 1together and turn the S-
clip 2in a clockwise direction as far as its limit stop; then remove the
moving belt and hose from the pump head.
Dismantle the pump head:
3 Unscrew the two nuts 3that secure the pump head (spanner size 5.5).
4 Pull the pump head 4off the roller bearing axle, and remove the roller
mounting 5from the pump head.
Replace pressure rollers and springs:
5 Pull the pressure springs 6out of the hole in the roller mounting 5and
out of the retaining slot in the roller axle 7. Remove the roller axle from
the roller mounting, and pull the pressure roller 8off the roller axle.
6 Push the new pressure roller 8onto the roller axle 7and secure with
new pressure springs 6in the roller mounting 5.
Fit the pump head:
7 Insert the roller mounting 5in the pump head 4, and push both com-
ponents together onto the roller mounting axle. During this process,
check to ensure that the roller mounting axle and roller mounting fit
together properly.
Secure the pump head 4with the two nuts 3.8
It is expedient to open the front panel forwards: this enables the
pump’s base plate with the fastening screws to be secured
from inside.
Refit the hose:
9 Insert moving belt 1with the hose in the pump head; using the
handles, press the moving belt together while at the same time
turning the S-clip 2counterclockwise until it engages.
Start the feed unit again:
10 Switch on power supply to feed unit.
Replace Pressure
Rollers and Springs
(see Fig. 5)
11 The sample gas flow should only be restarted after the lead time
period.
Continued on next page

42/23-58 EN Rev. 1 SCC-E Sample Gas Feed Unit Operator’s Manual 17
Replacing the Condensate Pump Pressure Rollers and Springs,
continued
Fig. 5
Condensate Pump,
Roller Mounting
3
4
1
2
5
7
6
8
1Moving belt
2S-clip
3Nuts for Securing the Pump Head (x 2)
4Pump Head
5Roller Mounting
6Pressure Springs (x 4)
7Roller Axle
8Pressure Roller (x 2)

18 SCC-E Sample Gas Feed Unit Operator’s Manual 42/23-58 EN Rev. 1
Replacing the Diaphragm and Valve Plates in the Diaphragm Pump
When do the
diaphragm and valve
plates need to be
replaced?
The diaphragm and valve plates in the diaphragm pump must be replaced when
the diaphragm pump no longer feeds gas efficiently enough.
CAUTION!
Residues from the gas that the pump has been feeding may be found on the
diaphragm and valve plates. These materials can flow out when the
diaphragm pump is opened. Take appropriate measures where needed to
collect such residues.
The medium being fed may be corrosive and poisonous. Appropriate
precautions must be taken.
Step Action
1
Stop the sample gas supply and shut off the feed unit power
supply.
Remove the diaphragm pump:
Remove the case cover and the front panel of the feed unit.2
Take care not to damage the temperature controller in the
version with Peltier cooler.
3 Loosen screws 1and 2. Turn the mounting plate 3with the diaphragm
pump to the right and pull it out of the case.
4 When the diaphragm pump shall be removed completely, disconnect
the pump’s power supply leads from the terminals X5-4 und X5-5.
1
3
2
X5-4
X5-5
Take off the pump hoses and clean the outside of the pump.
Replace Diaphragm
and Valve Plates in the
Diaphragm Pump
(see Fig. 6)
5
Mark both pump hoses: The pump inlet hose is connected to
the diaphragm filter outlet and the pump outlet hose is con-
nected to the flow meter inlet.
Continued on next page

42/23-58 EN Rev. 1 SCC-E Sample Gas Feed Unit Operator’s Manual 19
Replacing the Diaphragm and Valve Plates, continued
Fig. 6
Diphragm Pump
1Head cap
2Head cap screws
3 Spacer plate
4Structural diaphragm
5Casing
6Connecting rod
7Valve plates
8Sealing rings
9Belleville spring
10 Distance ring(s)
11 Supporting bell
Step Action
Remove the pump head:
6 Mark the head cap 1, spacer plate 3and casing 5with a felt-tip pen.
This prevents the possibility of these parts being fitted incorrectly
when the pump is reassembled later.
7 Undo the four head cover screws 2and remove the head cap along
with the spacer plate from the pump casing.
Replace diaphragm:
8 Move the structural diaphragm 4by rotating the fan impeller to its
upper return point.
9 Hold opposite sides of the structural diaphragm, raise it, then remove
it by rotating in an anticlockwise direction. During this procedure you
should take care to ensure that the Belleville spring 9and the distance
ring(s) 10 do not fall from the structural diaphragm’s threaded bolt into
the casing.
10 Remove the Belleville spring, distance ring(s) and supporting bell 11
from the structural diaphragm’s threaded bolt and retain them.
Check all the parts for dirt and, if necessary, clean them with a dry
cloth or compressed air.
Replace Diaphragm
and Valve Plates in the
Diaphragm Pump
(continued)
11
Do not use solvents for cleaning as they can attack the plastic
parts.
Continued on next page

20 SCC-E Sample Gas Feed Unit Operator’s Manual 42/23-58 EN Rev. 1
Replacing the Diaphragm and Valve Plates, continued
Step Action
Push the supporting bell, the distance ring(s) and the Belleville spring
in that order onto the threaded bolt of the new structural diaphragm.
12
The disk edge of the spring must be aligned with the structural
diaphragm.
13 Move the connecting rod 6to its upper return point.
14 Screw the new structural diaphragm with support bell, distance ring(s)
and Belleville spring onto the connecting rod and hand-tighten it.
Replace valve plates:
15 Separate head cap 1from the spacer plate 3.
16 Remove the valve plates 7and the sealing rings 8from the spacer
plate.
17 Check that the valve seats, spacer plate and head cap are clean; if
any of them display unevenness, scratches or corrosion they should
be replaced.
18 Insert the new valve plates in the valve seats on the spacer plate. The
valve plates for the compression and suction sides are identical; the
same applies to the upper and lower sides of the valve plates.
19 Move the valve plates gently in a horizontal plane to ensure that they
are not locked.
20 Insert sealing rings in the spacer plate.
Fit the pump head:
21 Using the fan impeller, move the structural diaphragm to its upper
dead point.
22 Place the spacer plate 3, the valve plates 7, sealing rings 8and the
head cap 1on the casing in accordance with the markings.
23 Check that the head cap is centered correctly by moving it gently
sideways.
24 Tighten the head cap screws 2crosswise only slightly.
25 Check that the pump moves freely by turning the fan impeller.
26 Using the fan impeller, move the structural diaphragm to its upper
dead point.
27 Hand-tighten the head cap screws.
Re-install the diaphragm pump:
28 Attach the hose coming from the diaphragm filter outlet to the pump
inlet and the hose going to the flow meter inlet to the pump outlet.
29 If necessary connect the pump’s power supply leads to the terminals
X5-4 and X5-5.
30 Insert the mounting plate with the diaphragm pump into the case and
fasten it.
Fasten the case cover and the front panel of the feed unit.31
Take care not to bend or squash any hoses and not to damage
the temperature controller in the version with Peltier cooler.
Start the feed unit again:
32 Check that the gas feed paths have no leaks (see instructions on p. 21).
33 Switch on power supply to feed unit.
Replace Diaphragm
and Valve Plates in the
Diaphragm Pump
(continued)
34 The sample gas flow should only be restarted after the lead time
period.