Vacuum pump systems Operating Instructions SC 950

Vacuum pump systems Operating Instructions  SC 950
Operating Instructions
Read and observe these Operating Instructions!
Vacuum pump systems
SC 950
SEM 950
KNF Neuberger GmbH
Alter Weg 3
D-79112 Freiburg
Germany
Phone ++49 / (0)7664 / 5909-0
Fax ++49 / (0)7664 / 5909-99
E-Mail: [email protected]
www.knf.de
KNF 125549-125552 04/16
Translation of original Operating Instructions, English
SH 950
SR 950
Items including delivery SC 950:

Vacuum pump system including hand terminal (batteries
included)

Coated collection flasks (2 x)

Flask clamps (2 x)

Mains cable

USB cable for connecting vacuum pump system to PC

Power supply for hand terminal

Operating Instructions

CD with digital Operating Instructions and software for
operating the vacuum pump system with a PC
Items including delivery SEM/SH/SR 950:

Vacuum pump system

Coated collection flasks (2 x)

Flask clamps (2 x)

Mains cable

Operating Instructions

CD with digital Operating Instructions
Transport fastener (only SC 950)
The hand terminal is fastened in place at the factory, to prevent
damage during transport.
To remove the hand terminal, it is first necessary to release the
transport fastener. For further details, see chapter
6. Installation and connection.
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
Vacuum Pump System SC/SEM/SH/SR950
Content
Content
Page
1. About this document
1.1. Use of the Operating Instructions
1.2. Symbols and markings
2. Use 5
2.1. Intended use
2.2. Improper use
3. Safety
4
4
4
5
6
7
4. Technical data
9
4.1. Vacuum pump system
9
4.2. Vacuum pump system’s hand
terminal (only SC 950)
11
4.3. Software (only SC 950)
12
5. Assembly and function
13
5.1. SC 950
13
5.1.1. Assembly of the vacuum pump
system
13
5.1.2. Vacuum pump system functions 14
5.1.3. Hand terminal
15
5.2. SEM 950
17
5.2.1. Assembly of the vacuum pump
system
17
5.2.2. Vacuum pump system functions 18
5.3. SH 950
19
5.3.1. Assembly of the vacuum pump
system
19
5.3.2. Vacuum pump system functions 20
5.4. SR 950
21
5.4.1. Assembly of the vacuum pump
system
21
5.4.2. Vacuum pump system functions 22
5.5. Pump
23
5.6. Gas ballast
24
6. Installation and connection
25
6.1. Installation
25
6.2. Connection
26
7. Operation
27
7.1. Start up
27
7.2. Taking system out of operation 30
8. Operating vacuum pump system 31
8.1. Hand terminal (only SC 950)
31
8.1.1. General functions and displays 31
8.1.2. Operation
34
8.1.3. Changing batteries on the hand
terminal
39
8.2. Operation without hand terminal 40
8.2.1. SC 950
40
8.2.2. SEM 950
41
8.2.3. SH/SR 950
42
8.3. Software (only SC950)
43
9. Servicing
44
9.1. Servicing schedule
44
9.2. Cleaning
44
9.2.1. Flushing vacuum pump system 44
9.2.2. Cleaning vacuum pump system 44
9.2.3. Emptying collection flask on the
suction and pressure sides
44
9.3. Replacing diaphragms and valve
plates
46
9.3.1. Removing the pump
47
9.3.2. Overview of pump parts
48
9.3.3. Disassembling head connection 49
9.3.4. Disassembling pump heads
49
9.3.5. Replacing the diaphragms and
valve plates
51
9.3.6. Assembling heads and head
connection
52
9.3.7. Final steps
53
10. Troubleshooting
54
11. Spare parts and accessories
11.1. Spare parts
11.2. Accessories
12. Returns
59
59
60
61
13. Health and safety clearance and
decontamination form
62
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
About this document
Vacuum Pump System SC/SEM/SH/SR950
1.
About this document
1.1. Use of the Operating Instructions
The Operating Instructions are part of the vacuum pump system.
 Carefully study the Operating Instructions before using a
vacuum pump system.
 Always keep the Operating Instructions handy in the work area.
 Forward the Operating Instructions to any subsequent owners
of the vacuum pump system.
Project systems
Customer-specific project systems (systems which begin with “PJ”
or “PM”) may differ from the Operating Instructions.
 In case of project systems, take note of any additionally agreed
specifications.
Compliance with the Operating Instructions is essential for the
safe and reliable operation of the vacuum pump system.
Failure to do so may result in damage or injury.
1.2. Symbols and markings
Warning
A danger warning is located here.
It also indicates the possible consequences of failure
to observe the warning. The signal word (i.e.
WARNING “Warning”) indicates the level of danger.
 Here you will see actions for avoiding the danger
and potential consequences.
Danger levels
Signal word Meaning
Consequences if not observed
DANGER
warns of
Consequences include death or
immediate danger serious injuries and/or serious
property damage.
WARNING warns of potential Death or serious injuries and/or
danger
serious property damage are
possible.
CAUTION warns of a
Minor injuries or damage to
potentially
property are possible.
dangerous
situation
Tab. 1
Other information and symbols
 This indicates an activity (step) that must be carried out.
1. This indicates the first step of an activity to be carried out. Any
additional steps are consecutively numbered.
This symbol indicates important information.
4
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Vacuum Pump System SC/SEM/SH/SR950
2.
Use
Use
2.1. Intended use
The vacuum pump systems SC/SEM/SH/SR 950 are designed for
use in chemical, pharmaceutical, and biological laboratories. They
are exclusively intended for transferring gases and vapors.
Make sure that the installation location is dry and the pump/system
is protected against water in the form of rain, spray, splashes and
drips.
Vacuum pump system is solely for use in indoor areas.
Owner's responsibility
Operating parameters and
conditions
Only install and operate the vacuum pump system under the
operating parameters and conditions described in chapter 4,
Technical data.
Protect vacuum pump system against humidity.
Requirements for
transferred medium
Before using a medium, check the compatibility of the materials of
the pump head, diaphragm, valves, sealings and tubing with the
medium.
Before using a medium, check whether the medium can be transferred danger-free in the specific application case.
Only transfer gases which remain stable under the pressures and
temperatures occurring in the pump.
High performance condenser
Only SC/SEM/SH 950:
The high performance condenser must be installed on the outlet
side of the pump; if it is installed on the inlet side there is a danger
of implosion.
Observe the correct usage of the gas- and cooling liquidconnections on the high performance condenser. Inlet and outlet
connections for the gas are not interchangeable.
Accessories
Laboratory equipment or additional components connected to a
vacuum pump system have to be suitable for use with the pneumatic capabilities of the vacuum pump system (see chapter 4,
page 8).
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5
Use
Vacuum Pump System SC/SEM/SH/SR950
2.2. Improper use
The vacuum pump system must not be operated in an explosive
atmosphere.
The vacuum pump system is not suitable for transferring dusts.
The vacuum pump system is not suitable for transferring liquids.
The vacuum pump system must not be used if the entry of air or
gas into the vacuum pump system during venting (vent valve) or an
open gas ballast valve could result in the creation of reactive,
explosive or otherwise hazardous mixtures (e.g. with the medium).
The vacuum pump system must not be used to create vacuum and
pressure simultaneously.
Never apply positive pressure to the suction side of the vacuum
pump system.
6
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Vacuum Pump System SC/SEM/SH/SR950
3.
Safety
Safety
The vacuum pump systems are built according to the generally
recognized rules of technology and in accordance with the
pertinent occupational safety and accident prevention regulations.
Nevertheless, potential dangers during use can result in injuries to
the user or others or in damage to the pump systems or other
property.
Only use the vacuum pump systems when they are in a good
technical and proper working order, in accordance with their
intended use, observing the safety advice within the Operating
Instructions, at all times.
Personnel
Make sure that only trained and instructed personnel or specially
trained personnel work on the vacuum pump systems. This
especially applies to assembly, connection and servicing work.
Make sure that all personnel have read and understood the Operating Instructions, especially the "Safety" chapter.
Working in a safetyconscious manner
Observe the accident prevention and safety regulations when performing any work on the vacuum pump systems and during operation.
Do not expose any part of your body to the vacuum.
Open housing parts with notice sticker (see fig. 1) only after separating mains plug from power source.
Fig. 1: Notice sticker
Correct match between hand
terminal and vacuum pump
system
Only SC 950:
Ensure that personnel check that the hand terminal is the right one
for this particular system before using a SC 950 vacuum pump
system. Vacuum pump systems are equipped with a paging system for this purpose (see Actuating the vacuum pump system,
page 38).
Handling dangerous media
When transferring dangerous media, observe the safety regulations for handling such media.
Handling flammable media
Be aware that the vacuum pump systems are not designed to be
explosion-proof.
Make sure the temperature of the medium is always sufficiently
below its ignition temperature, to avoid ignition or explosion. This
also applies to unusual operational situations.
Note that the temperature of the medium increases when the pump
compresses the medium.
Hence, make sure the temperature of the medium is sufficiently
below the ignition temperature of the medium, even when it is
compressed to maximum permissible operating pressure of the
vacuum pump system. The maximum permissible operating pressure of the vacuum pump system is stated in the technical specifications (see chapter 4, page 9).
If necessary, consider any external sources of energy, such as
sources of radiation, that could additionally heat the medium.
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7
Safety
Vacuum Pump System SC/SEM/SH/SR950
In case of doubt, consult the KNF customer service.
Ventilating the vacuum pump
system
When ventilating the vacuum pump system with air or inert gas, be
sure to prevent formation of reactive or explosive media. The
maximum permissible operating pressure at the ventilation
connection (Fig. 2/18, p. 13 (SC 950) or Fig. 4/15, p. 17 (SEM
950)) is 0.1 bar g.
Environmental protection
All replacement parts should be properly stored and disposed of in
accordance with the applicable environmental protection
regulations. Ensure adherence to the pertinent national and
international regulations. This applies especially to parts
contaminated with toxic substances.
Standards
The vacuum pump systems SC/SEM/SH/SR 950 conform to the
Directive 2011/65/EU (RoHS2).
The vacuum pump systems SC/SEM/SH/SR 950 conform to the
safety regulations of the EC Directive 2014/30/EU concerning
Electromagnetic Compatibility and the EC Directive 2006/42/EC
concerning Machinery. The requirements of the following
harmonised standards have been used:

DIN EN 61010-1

DIN EN 61326-1 – Class A

DIN EN 50581
The systems correspond to IEC 664:
Customer service and
repairs

the overvoltage category II

the pollution degree 2
All repairs to the vacuum pump system must be carried out by the
relevant KNF Customer Service team.
Housings with voltage-caring parts may be opened by technical
personnel only.
Use only genuine parts from KNF for servicing work.
8
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Vacuum Pump System SC/SEM/SH/SR950
4.
Technical data
Technical data
4.1. Vacuum pump system
Materials for parts contacting the medium
Pump head
Connection parts
Diaphragms
Valve plates
Flat seals
O-rings, green
O-rings, black
Hose connector gas inlet
Jose connector gas outlet
Hose connector inert gas
connection
Tubing
Only SC/SEM 950:
Tubing inert gas connection
Adaptor separator
Only SC/SEM 950:
Pressure sensor
Venting valve / Gas ballast
valve:
Piston seal
O-ring
Tube
PPS
PPS
PTFE-coated
FFPM
FFPM
FPM
FFPM
PTFE / PVDF
PP / PVDF
POM / PA
®
Norprene
PVC
PP
Ceramics / 1.4404
FFPM
FPM
1.4301
Pneumatic performance
Max. permissible operating
pressure [bar g]
Ultimate vacuum [mbar abs.]
0
≤ 2 mbar
≤ 4 mbar with opened gas ballast
50 (controllable)
Flow rate at atm. pressure
[l/min]*
Max. permissible pressure at
0.1
the inert gas connection [bar g]
Ambient and media temperature
Permissible
+ 10 °C to + 40 °C
ambient temperature
Permissible media temperature + 10 °C to + 40 °C
*Liters in standard state (1,013 mbar at 0 °C)
Tab. 2 (part 1)
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9
Technical data
Vacuum Pump System SC/SEM/SH/SR950
Other parameters
Vacuum connection and gas
outlet
Ventilation connection
Weight [kg]:
- SC 950 (including hand
terminal)
- SEM 950
- SH 950
- SR 950
Dimensions W x H x D [mm]:
SC/SEM/SH 950:
SR 950:
Maximum permissible ambient
relative humidity
Maximum altitude of
installation
[m above sea level]
For tube ID 10 mm
For tube ID 4 mm
14
13.5
13
12.5
246 x 487 x 313
246 x 487 x 264
80 % for temperatures up to
31°C, decreasing linearly to
50 % at 40°C
2000
Only SC/SEM/SH 950:
Operating parameters of coolant (high-performance condenser)
Max. permissible pressure
[bar g]
Permissible temperature
Coolant connections on highperformance condenser
2
Coolant-wetted surface [cm ]
3
- 15 °C to + 20 °C
For tube ID 8 mm
Min. 470
Electrical data vacuum pump system
Voltage** [V]
Frequency [Hz]
Max. current consumption [A]
Max. watt consumption [W]
Protection class
Fuse vacuum pump system [A]
Drive motor fusing
Tab. 2 (part 2)
100-240 V +/- 10 %
50-60 Hz
1.7
150
IP20
2 x T2.5
Electronic overcurrent protection
** Automatic voltage selection
The pumps of the vacuum pump systems are supplied by a
universal power supply with integrated overload protection.
They are protected against overheating by a temperature
sensor on the motor board and equipped with overcurrent
protection.
If one of these safety functions is triggered, the pump will be
shut down and must be manually reset, as follows:
 Separate pump from the mains.
 Remove the cause(s) of the fault before restarting.
10
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Vacuum Pump System SC/SEM/SH/SR950
Technical data
4.2. Vacuum pump system’s hand terminal (only
SC 950)
Dimensions: W x H x D [mm]
91 x 190 x 65
Weight [kg]
0.5
Operating voltage [V DC]
12
Current consumption [A]
1.25
Wireless connection's
frequency band [GHz]
Wireless range
2.4
Power supply
About 50 m without obstacles,
about 10 m through walls
Through integrated batteries or
power supply (in delivery
included)
DC charging socket
Chargeable batteries
Battery service life*
Charging time*
Tab. 3
External diameter: 6.3 mm
Inside diameter: 2 mm
4 x round AA 1.2 V 2300 mAh,
fast-charging; see spare parts
list in chapter 11
Up to 12 hours, depending on
number of entries and data
transmission
approx. 7 h
* Applies to standard included batteries
When charging the SC 950 vacuum pump system's hand
terminal, use only the original power supply from KNF.
Several different vacuum pump systems SC 950 may be
operated simultaneously with their respective hand terminals
within the wireless connection range.
The wireless connection between hand terminal and vacuum
pump system SC 950 is robustly resistant to operation of
mobile telephones and Bluetooth devices in the immediate
area.
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11
Technical data
Vacuum Pump System SC/SEM/SH/SR950
4.3. Software (only SC 950)
The USB connection between the PC and the vacuum pump
system is operated as an RS232 interface. Accordingly, in the
operating system it is managed as an additional COM connection
and can be addressed with conventional terminal software. Please
see the delivered CD for information on operating the vacuum
pump system via software.
12
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Vacuum Pump System SC/SEM/SH/SR950
5.
Assembly and function
Assembly and function
5.1. SC 950
5.1.1. Assembly of the vacuum pump system
1
2
Carrying handle
Transport fastener for hand
terminal
3 High-performance
condenser
4 Hand terminal
(removable; signals
transmitted wirelessly)
5 Hand terminal dock
6 Gas ballast switch
7 Flask clamp for 8 and 9
8 Pressure-side condensation collection flask (coated)
9 Suction-side condensation
collection flask (coated)
10 Base
11 Mains switch
12
13
14
15
16
17
18
19
20
21
22
Top fan
Bottom fan
Coolant valve connection
USB port for connecting
vacuum pump system to
PC
Mains plug connection
Fuse drawer
Ventilation connection
Vacuum chamber
connection (gas inlet)
Coolant connection on
high-performance
condenser (feed)
Coolant connection on
high-performance
condenser (return)
Gas outlet
Fig. 2: Vacuum pump system SC 950
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Assembly and function
Vacuum Pump System SC/SEM/SH/SR950
The vacuum pump system generates a vacuum that can be controlled either through the hand terminal (see Fig. 2/4, p. 13) or a
PC.
Collection flask (Fig. 2/9) collects on the suction side of the pump
particles and drops that were, contrary to the requirements of the
pump, suctioned from the vacuum chamber. The collection flask is
coated (implosion protection) and fastened to the vacuum pump
system via a flask clip (7).
The high-performance condenser (3) at the pump outlet once again
recollects solvents from the pumped gas instead of allowing it exit
into the environment or fume hood. The high-performance condenser is surrounded by a shell for temperature insulation and
explosion protection.
Solvents deposited in the high-performance condenser are collected in the coated (for explosion protection) collection flask (8). A
flask clip (7) secures the glass flask to the condenser flange. A
recirculating cooler or continuously flowing cold water (or another
cooling media) cools the high-performance condenser to the
condensation temperature.
5.1.2. Vacuum pump system functions
The vacuum pump system can be operated in four different modes:
14

Evacuate
The vacuum pump system evacuates a vacuum chamber with
adjustable pump capacity.

Pressure control
The vacuum pump system controls system pressure to the setpoint pressure value (constant pressure).

Automatic
The vacuum pump system independently finds the sample's
vapor pressure and adjusts process pressure accordingly.

Function
The vacuum pump system controls pressure according to the
entered pressure curve. Up to 10 different pressure curves can
be stored. The following process parameters can be entered:

Setpoint pressure at various time points after starting the
process

Coolant valve (accessory) ON and OFF with time point
after start of process

Option "Jump" with time after the start of the process:
The system evacuates/ventilates to the required pressure
as quickly as possible.

Option "Automatic" with time after the start of the process:
Automatic detection of the boiling pressure
If the set limit pressure is reached without a vapor
pressure, the program goes to the next function step.
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
Vacuum Pump System SC/SEM/SH/SR950

Assembly and function
Option "Automatic Plus" with time after the start of the
process:
Automatic detection of the vapor pressure with subsequent
pressure reduction.
At any time during an active process, you can switch to manual
process control. Functions for Evacuate and Pressure control will
be available simultaneously. When activating manual process control, the current actual pressure will be adopted as the first setpoint
pressure. In other words, process pressure will be initially "frozen"
at the current value.
The operating modes can be combined in any way for the purposes of intelligent process control. For example, after successful
boiling point detection in the automatic mode, the following opera-ting modes are available for specific distilling off of the solvent
recovered:

Evacuation
(constant vaporization rate for optimum condenser capacity
utilization)

Function
(Following a preset pressure ramp provided in order to attain a
separation from components with higher boiling points)

Manual process control
(active control of the distillation using the setpoint pressure)
In order to change to another operating mode, the process is first
stopped and then restarted in the new operating mode.
Gas ballast
The gas ballast switch (Fig. 2/6) can be used to open and close the
gas ballast valve on the vacuum pump system's pump (see
Chapter 5.6).
5.1.3. Hand terminal
Basic elements
1
2
3
4
5
Upper grip
Touchscreen
I/O switch
DC input 12 V
Rotary knob for

adjusting pump speed
and setpoint pressure

switching to manual
operation
Fig. 3: Hand terminal SC 950
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Assembly and function
Vacuum Pump System SC/SEM/SH/SR950
Function
The hand terminal is used to set process parameters with which
the vacuum pump system SC 950 will control pressure.
Settings can be made on the hand terminal's touchscreen (2) and
with the rotary knob (5).
To operate the vacuum pump system remotely, remove the hand
terminal from the holder (see chapter 5.1.1, page 13) on the
vacuum pump system. This provides a convenient way to operate
the vacuum pump system when it is in a cabinet or under a closed
fume hood.
Whenever the hand terminal is located in the holder while the
vacuum pump system is turned on, the batteries in the hand
terminal will charge automatically. This happens even when hand
terminal is switched off. Alternatively, the batteries can be charged
through the hand terminal's power supply (see DC input (4)). As a
result, it is not necessary to place the vacuum pump system where
it is easily accessible for the user.
The power supply also makes it possible to supply the hand terminal with electrical power directly from a mains connection.
An acoustic alarm sounds on the hand terminal when the battery
charge levels are low.
16
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Vacuum Pump System SC/SEM/SH/SR950
Assembly and function
5.2. SEM 950
5.2.1. Assembly of the vacuum pump system
1
2
3
4
5
6
7
8
9
Carrying handle
High-performance
condenser
Control terminal
Gas ballast switch
Flask clamp for 6 and 7
Pressure-side condensation collection flask (coated)
Suction-side condensation
collection flask (coated)
Base
Mains switch
10
11
12
13
14
15
16
Top fan
Bottom fan
Coolant valve connection
Mains plug connection
Fuse drawer
Ventilation connection
Vacuum chamber
connection (gas inlet)
17 Coolant connection on
high-performance
condenser (feed)
18 Coolant connection on
high-performance
condenser (return)
19 Gas outlet
Fig. 4: Vacuum pump system SEM 950
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Assembly and function
Vacuum Pump System SC/SEM/SH/SR950
Collection flask (Fig. 4/7) collects on the suction side of the pump
particles and drops that were, contrary to the requirements of the
pump, suctioned from the vacuum chamber. The collection flask is
coated (implosion protection) and fastened to the vacuum pump
system via a flask clip (5).
The high-performance condenser (2) at the pump outlet once again
recollects solvents from the pumped gas instead of allowing it exit
into the environment or fume hood. The high-performance condenser is surrounded by a shell for temperature insulation and
explosion protection.
Solvents deposited in the high-performance condenser are collected in the coated (for explosion protection) collection flask (6). A
flask clip (5) secures the glass flask to the condenser flange. A
recirculating cooler or continuously flowing cold water (or another
cooling media) cools the high-performance condenser to the
condensation temperature.
5.2.2. Vacuum pump system functions
The flow of the pump (15% - 100%) can be set via the rotary knob
on the control terminal (3).
Gas ballast
18
The gas ballast switch (4) can be used to open and close the gas
ballast valve on the vacuum pump system's pump (see Chapter
5.6).
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Vacuum Pump System SC/SEM/SH/SR950
Assembly and function
5.3. SH 950
5.3.1. Assembly of the vacuum pump system
1
2
3
4
5
6
7
8
9
Carrying handle
High-performance
condenser
Rotary knob
Gas ballast switch
Flask clamp for 6 and 7
Pressure-side condensation collection flask (coated)
Suction-side condensation
collection flask (coated)
Base
Mains switch
10
11
12
13
14
Top fan
Bottom fan
Mains plug connection
Fuse drawer
Vacuum chamber
connection (gas inlet)
15 Coolant connection on
high-performance
condenser (feed)
17 Coolant connection on
high-performance
condenser (return)
17 Gas outlet
Fig. 5: Vacuum pump system SH 950
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19
Assembly and function
Vacuum Pump System SC/SEM/SH/SR950
Collection flask (Fig. 5/7) collects on the suction side of the pump
particles and drops that were, contrary to the requirements of the
pump, suctioned from the vacuum chamber. The collection flask is
coated (implosion protection) and fastened to the vacuum pump
system via a flask clip (5).
The high-performance condenser (2) at the pump outlet once again
recollects solvents from the pumped gas instead of allowing it exit
into the environment or fume hood. The high-performance condenser is surrounded by a shell for temperature insulation and
explosion protection.
Solvents deposited in the high-performance condenser are collected in the coated (for explosion protection) collection flask (6). A
flask clip (5) secures the glass flask to the condenser flange. A
recirculating cooler or continuously flowing cold water (or another
cooling media) cools the high-performance condenser to the
condensation temperature.
5.3.2. Vacuum pump system functions
The flow of the pump can be set via the rotary knob on the control
terminal (3).
I If the rotary knob is rotated to the left until it engages the
mechanical indent, the pump will rotate with a minimum flow
rate of 15%.
If the rotary knob is then rotated farther to the left (past the
mechanical indent), the vacuum pump system's pump will be
switched off.
Gas ballast
20
The gas ballast switch (4) can be used to open and close the gas
ballast valve on the vacuum pump system's pump (see Chapter
5.6).
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Vacuum Pump System SC/SEM/SH/SR950
Assembly and function
5.4. SR 950
5.4.1. Assembly of the vacuum pump system
1
2
3
4
5
6
7
8
Carrying handle
Rotary knob
Gas ballast switch
Flask clamp for 6 and 7
Pressure-side condensation collection flask (coated)
Suction-side condensation
collection flask (coated)
Base
Mains switch
9
10
11
12
13
Top fan
Bottom fan
Mains plug connection
Fuse drawer
Vacuum chamber
connection (gas inlet)
14 Gas outlet
Fig. 6: Vacuum pump system SR 950
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21
Assembly and function
Vacuum Pump System SC/SEM/SH/SR950
Collection flask (Fig. 6/6) collects on the suction side of the pump
particles and drops that were, contrary to the requirements of the
pump, suctioned from the vacuum chamber. The collection flask is
coated (implosion protection) and fastened to the vacuum pump
system via a flask clip (4).
Solvents deposited on the pressure side of the pump are collected
in the collection flask (coated for explosion protection) (5). A flask
clip (4) fastens the glass flask to the separator adapter.
5.4.2. Vacuum pump system functions
The flow of the pump can be set via the rotary knob on the control
terminal (2).
If the rotary knob is rotated to the left until it engages the
mechanical indent, the pump will rotate with a minimum flow
rate of 15%.
If the rotary knob is then rotated farther to the left (past the
mechanical indent), the vacuum pump system's pump will be
switched off.
Gas ballast
22
The gas ballast switch (3) can be used to open and close the gas
ballast valve on the vacuum pump system's pump (see Chapter
5.6).
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
Vacuum Pump System SC/SEM/SH/SR950
Assembly and function
5.5. Pump
Assembly
1
2
3
4
5
6
7
Outlet valve
Inlet valve
Working chamber
Diaphragm
Eccentric
Connecting rod
Pump drive
Fig. 7: Pump design
How diaphragm pumps work
Diaphragm pumps transfer, compress (depending on pump
version) and evacuate gases and vapors.
The elastic diaphragm (4) is moved up and down by the eccentric
(5) and the connecting rod (6). In the downward stroke it aspirates
the gas to be transferred via the inlet valve (2). In the upward
stroke, the diaphragm presses the medium out of the pump head
via the outlet valve (1). The diaphragm hermetically seals the
working chamber (3) from the pump drive (7).
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23
Assembly and function
Vacuum Pump System SC/SEM/SH/SR950
5.6. Gas ballast
Assembly
1
Gas ballast valve
Fig. 8: Gas ballast of the pump
Function gas ballast
Personal injury caused by poisoning or explosion
and damage to the pump.
 Make sure that no reactive or explosive mixtures
will be produced when gas ballast valve is open.
WARNING
When pumping vaporous media, opening the gas ballast valve
can minimise the formation of condensation in the pump
heads.
Opening the gas ballast valve deteriorates ultimate vacuum
performance.
The gas ballast valve can be opened and closed via the gas ballast
switch (Fig. 2/6, p. 13 or Fig. 4/4, p. 17, Fig. 5/4, p. 19 and Fig. 6/3,
p. 21):
- push once
 open gas ballast valve, blue LED on
- push again
 close gas ballast valve again, blue LED off
Please contact KNF Service if you require an inert connection for
the gas ballast.
24
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
Vacuum Pump System SC/SEM/SH/SR950
6.
Installation and connection
Installation and connection
 Always install the vacuum pump system under the operating
parameters and conditions described in chapter 4, Technical
data, page 9).
 Observe the safety precautions (see chapter 3, page 7).
6.1. Installation
 Before installation, store the vacuum pump system at the
installation location to bring it up to room temperature.
Cooling air supply
 Install the vacuum pump system so that the two motor fans of
the vacuum pump system are not blocked.
Installation location
 Make sure that the installation location is dry and the vacuum
pump system is protected against water in the form of rain,
spray, splashes and drips.
 Choose a safe location (flat surface) for the vacuum pump
system.
 Protect the vacuum pump system against dust.
 Protect the vacuum pump system against vibrations and jolts.
Connected components
Coolant for high-performance
condenser
Removing the transport
fastener
 Only connect components to the vacuum pump system which
are designed for the pneumatic data of the vacuum pump system (see chapter 4, page 9).
Only SC/SEM/SH 950:
A recirculating cooler or flowing cold water (or another cooling
media) is needed to cool the high-performance condenser to the
condensation temperature.
Only SC 950:
The hand terminal of the vacuum pump system SC 950 is fastened
in place at the factory, to prevent damage during transport. To
remove the hand terminal, it is first necessary to release the
transport fastener. To do this, rotate the knurled knob (Fig. 2/2, p.
13) out until the hand terminal can be removed.
The transport fastener can be screwed in again for any future
transport operations.
Installing the collection flask
Install the collection flasks (Fig. 2/8 and 9, p. 13 or Fig. 4/6 and 7, p.
17, Fig. 5/6 and 7, p. 19 and Fig. 6/5 and 6, p. 21) with the flask
clips (Fig. 2/7, p. 13 or Fig. 4/5, p. 17, Fig. 5/5, p. 19 and Fig. 6/4, p.
21). The flasks and clips are included as loose parts.
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
25
Installation and connection
Vacuum Pump System SC/SEM/SH/SR950
6.2. Connection
1.
Connect the vacuum chamber to the gas inlet's hose connector (Fig. 2/19, p. 13 or Fig. 4/16, p. 17, Fig. 5/14, p. 19 and
Fig. 6/13, p. 21, for hose inside diameter of 10 mm). For this,
vacuum tubing must be used.
2.
Connect hose to high-performance condenser in order to
discharge gas exhaust (Fig. 2/22, p. 13 or Fig. 4/19, p. 17,
Fig. 5/17, p. 19 and Fig. 6/14, p. 21, for hose inside diameter
of 10 mm).
Only SC/SEM/SH 950:
Danger of high performance condenser bursting.
The high-performance condenser is not pressureproof.
CAUTION
 Do not reduce or regulate the quantity of gas at
the gas outlet, and do not install any components that hinder the gas flow.
Safely discharge gas exhaust so that no gas can escape into
the ambient air.
Only SC/SEM/SH 950:
Make sure that the high-performance condenser’s gas outlet is
not blocked (high-performance condenser is not pressureproof).
3.
Only SC/SEM/SH 950:
Attach coolant feed and return to high-performance condenser
(Fig. 2/20 and 21, p. 13 or Fig. 4/17 and 18, p. 17 and Fig.
5/15 and 16, p. 19, for hose inside diameter of 8 mm).
SC/SEM 950 only:
Connect only the KNF coolant valve (see Chapter 11.2,
Accessories) to the coolant valve connection (Fig. 2/14, p. 13
or Fig. 4/12, p. 17). Consult with KNF before using any other
valves.
26
4.
Only SC/SEM 950:
If necessary: Connect inert gas supply to ventilation connection (Fig. 2/18, p. 13 or Fig. 4/15, p. 17). Observe the safety
instructions in chapter 3. Please contact KNF Service if you
require an inert connection for the gas ballast.
5.
Insert the power cable plug into a properly installed shockproof
socket.
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
Vacuum Pump System SC/SEM/SH/SR950
7.
Operation
Operation
7.1. Start up
Before switching on the vacuum pump system, observe the
following points:
Operational requirements
 All hoses attached properly

Fan openings not blocked

Specifications of the power supply correspond with the data
on the vacuum pump system’s type plate.

Only SC/SEM/SH 950:
Recirculating cooler or cold water connection ready on highperformance condenser.

Only SC/SEM/SH 950:
The high-performance condenser's gas outlet is not blocked
(high-performance condenser is not pressure-proof).

Vacuum pump system is at room temperature.

Only SC 950:
Ensure that hand terminals are properly matched up with
appropriate vacuum pump system.

Only SC/SEM 950:
No reactive, explosive or otherwise hazardous mixtures may
be produced when ventilating the vacuum system through the
air inlet (Fig. 2/18, p. 13 or Fig. 4/15, p. 17) (if necessary, use
an inert gas)

When the gas ballast valve is open (blue LED illuminates) do
not allow reactive, explosive, or otherwise hazardous mixtures
to form (contact KNF Service when in doubt).
Tab. 4
 Only operate the vacuum pump system under the operating
parameters and conditions described in chapter 4, Technical
data (page 9).
 Make sure the vacuum pump system is used properly (see
chapter 2.1, page 5).
 Make sure the vacuum pump system is not used improperly
(see chapter 2.2, page 6).
 Observe the safety precautions (see chapter 3, page 7).
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Operation
Vacuum Pump System SC/SEM/SH/SR950
Only SC 950:
Uncontrolled operation may result in personal injury
and damage to the vacuum pump system.
DANGER
When using several vacuum pump systems SC 950,
there is the danger of confusing them, which can
result in undesired interference into other processes:
The transmission of commands from the wrong hand
terminal for the vacuum pump system may trigger an
uncontrolled response in the vacuum pump system
that the terminal controls.
 Every time a vacuum pump system SC 950 is
used with a hand terminal, it is essential to
ensure a correct match between the two
components. Use the paging function for this
purpose (see Actuating the vacuum pump
system, page 38).
 Additionally it is possible to use color stickers to
indicate which hand terminal belongs to which
vacuum pump system SC 950 (see chapter 11.
Spare parts and accessories).
Only SC 950:
Uncontrolled operation may result in personal injury
and damage to the vacuum pump system SC 950.
If the wireless connection between the hand terminal
WARNING and vacuum pump system SC 950 is broken, the
vacuum pump system will continue to operate with
the current settings.
 Immediately determine and remove the cause of
the interruption between the hand terminal and
vacuum pump system (chapter 10, page 54).
 If you are not able to reestablish wireless
contact, replace the hand terminal back to the
vacuum pump system (chapter 8.1.1, page 31).
The vacuum pump system can also be operated
directly and the ventilation valve and coolant
valve can be opened and closed directly
(chapter 8.2, page 40).
28
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Vacuum Pump System SC/SEM/SH/SR950
Operation
Only SC/SEM 950:
Personal injury caused by poisoning or explosion
and damage to the vacuum pump system.
 Make sure that no reactive or explosive mixtures
will be produced when ventilating the vacuum
WARNING
pump system through the air inlet or when gas
ballast valve is opened.
Hazard of the vacuum pump system bursting due to
excessive pressure increase
 Do not exceed max. permissible operating
pressure (0 bar).
WARNING
 Monitor pressure during operation.
 If the pressure exceeds the maximum permissible operating pressure, immediately shut down
vacuum pump system and eliminate fault (see
chapter 10, page 54).
Only SC/SEM/SH 950:
Danger of high performance condenser bursting.
The high-performance condenser is not pressureproof.
CAUTION
 Make sure that the high performance
condenser’s gas outlet is not blocked.
In order for the high-performance condenser to recover solvent
from the delivered gas, it must be cooled by means of a cold
water supply or recirculating cooler.
Only SC/SEM 950:
When using a coolant valve:
Danger of the high performance condenser bursting
 Make sure that the coolant valve is mounted
between the coolant supply and the coolant inlet
port of high performance condenser.
WARNING
Pump standstill
Inspect and empty collection
flasks
With the pump at a standstill, open pressure and suction lines to
normal atmospheric pressure
At appropriate intervals, inspect the fill level in the condensation
collection flasks located on the suction and pressure sides of the
vacuum pump system (Fig. 2/8 and 9, p. 13 or Fig. 4/6 and 7,
p. 17). When needed, empty the collection flasks; properly dispose
contents.
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29
Operation
Vacuum Pump System SC/SEM/SH/SR950
Switching vacuum pump system on
The vacuum pump system may not start up against overpressure during switch-on. During operation as well, there may be
no overpressure in the pneumatic lines. If a pump starts against
pressure, it may block. This activates the overload protection,
and the pump switches off.
 Switch on vacuum pump system at mains switch (Fig. 2/11,
p. 13 or Fig. 4/9, p. 17, Fig. 5/9, p. 19 and Fig. 6/8, p. 21).
 Only SC 950:
Switch on hand terminal at its I/O switch (see Fig. 3/3, page
15).
Refer to chapter 8, page 31, for information on operating the
vacuum pump system.
7.2. Taking system out of operation
 Stop the ongoing process.
 When transferring aggressive media, flush the vacuum pump
system prior to switch-off to increase the service life of the
diaphragms (see chapter 9.2.1, page 44).
 Switch off vacuum pump system with mains switch (see
Fig. 2/11, p. 13 or Fig. 4/9, p. 17, Fig. 5/9, p. 19 and Fig. 6/8,
p. 21).
 Only SC 950:
Switch off hand terminal at its I/O switch (see Fig. 3/3, page
15).
Only SC 950:
Uncontrolled operation may result in personal injury
and damage to the vacuum pump system SC 950.
If the hand terminal is switched off while the vacuum
WARNING pump system SC 950 remains switched on, the
vacuum pump system will continue to operate with
the current settings.
 Always switch the vacuum pump system off
when done working.
30
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
Vacuum Pump System SC/SEM/SH/SR950
8.
Operating vacuum pump system
Operating vacuum pump system
8.1. Hand terminal (only SC 950)
8.1.1. General functions and displays
1
2
3
4
5
Upper grip
Touchscreen
I/O switch
DC input 12 V
Rotary knob for

adjusting pump speed
and setpoint pressure

switching to manual
operation
Fig. 9: Hand terminal
The vacuum pump system is operated via the hand terminal with
the aid of:

a rotary knob (Fig. 9/5) and

a touchscreen (Fig. 9/2).
The rotary knob has the following functions:

Rotate: Changes pump capacity or the selected pressure
setting (depending on selected operating mode).

Press: Interrupts the active process and switches into manual
process control (pressing effects an evacuation in this case).
Touchscreen contents:

Display of the most important process variables (Fig. 10,
page 32).

Menu for selecting operating mode and units for pressure
display (Fig. 11, page 33).

Operating buttons (Fig. 11, page 33) with the following functions:

Start and stop the process;

open and close the ventilation valve;

open and close the high-performance condenser's coolant
valve (accessory).
Removing and replacing the hand terminal
To remove the hand terminal from the vacuum pump system:
grasp the upper grip of the hand terminal (Fig. 9/1) and pull until it
releases, and then remove it.
Replacing the hand terminal:
Insert the bottom of the terminal into the holder provided in the
vacuum pump system (Fig. 2/5, page 13); then push firmly on the
upper grip of the terminal (Fig. 9/1) until it clicks into place.
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31
Operating vacuum pump system
Vacuum Pump System SC/SEM/SH/SR950
Whenever the hand terminal is located in the holder while the
vacuum pump system is turned on, the batteries in the hand
terminal will charge automatically. This happens irrespective of
whether the hand terminal is switched on or off.
Every time you use a hand terminal, check to ensure a correct
match between the terminal and the vacuum pump system.
Use the paging system for this purpose (see Actuating the
vacuum pump system, page 38).
Displays
1 Battery:
- Charging
- Charging status
2
3
4
5
6
7
Connection to vacuum
pump system
- Direct connection
- Wireless connection
Process time
Actual pressure in selected
pressure unit (or „No
connection“, if no wireless
connection to vacuum
pump system)
Process active
Capacity in percent or
setpoint pressure in
selected pressure unit
(depending on operating
mode)
Explanation of rotary knob
functions
(Rotate: change capacity; Press:
interrupt operating mode and
switch to manual process control)
8
9
Only in Automatic operating
mode
Automatic with pressure
reduction
Only in Automatic operating
mode
Automatic pressure
reduction active
Fig. 10: Display on the touchscreen
32
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Vacuum Pump System SC/SEM/SH/SR950
Operating vacuum pump system
Menus and buttons
1 Operating mode menu
2 Pressure units menu
3 Button Actuating the vacuum pump system (Paging)
4 Button for ventilation valve:
ON = To open
OFF = To close
5 Button for coolant valve
(accessory) at highperformance condenser:
ON = To open
OFF = To close
6 Button for the process:
START = To start
STOP = To stop
7 Button for automatic
pressure reduction:
Press = Finish (the current
pressure is applied as the
setpoint pressure)
Fig. 11: Menus and buttons on the touchscreen
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33
Operating vacuum pump system
Vacuum Pump System SC/SEM/SH/SR950
8.1.2. Operation
Menu language
When the start page appears after switching the hand terminal on,
choose between the following languages: German, English, French,
Italian, Spanish, Dutch, Japanese, and Chinese. The selection can
be made only immediately after switching on.
Pressure unit
Process pressure can be displayed on the hand terminal in mbar,
bar, hPa, or Torr.
Use the Pressure units menu to select the pressure units (button
on touchscreen; see Fig. 12).
Pressure units can be changed only when no process is active.
In order to change the unit of pressure, it is necessary to
temporarily switch to another operating mode.
Fig. 12: Pressure units menu
Operating modes
The current operating mode is displayed at the top of the hand
terminal's touchscreen. Press on this line of the touchscreen to
open the menu for changing operating mode (see Fig. 13, at the
top).
Operating mode can be changed only when no process is
active.
Switching to manual process control (Break)

Press briefly on the rotary knob:
Manual process control; actual pressure will be adopted as the
setpoint pressure and actively controlled.
Within the manual process control
34

Press on the rotary knob:
Vacuum pump system will evacuate.

Let go:
Actual pressure will be adopted as setpoint pressure.
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
Vacuum Pump System SC/SEM/SH/SR950

Operating vacuum pump system
Rotate:
Changes setpoint pressure.
Fig. 13: Operating mode menu
Starting and stopping the process
Pressing the START button starts a process.
Pressing the STOP button stops a process.
Open and close the ventilation valve
Personal injury caused by poisoning or explosion
and damage to the vacuum pump system
 Ensure that the creation of reactive, explosive or
otherwise hazardous mixtures during the supply
WARNING
of air is prevented.
Pressing the ON button for ventilation valve (left button below)
opens the ventilation valve.
If the ON button is pressed for more than 3 seconds, the
ventilation valve remains open.
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
35
Operating vacuum pump system
Vacuum Pump System SC/SEM/SH/SR950
If the ventilation valve is permanently open (OFF button shown in
display), it can be closed again with the OFF button.
Opening and closing coolant valve (accessory)
Pressing the ON button for coolant valve (right button below)
opens the coolant valve on the high-performance condenser.
Pressing the OFF button for the coolant valve closes the coolant
valve on the high-performance condenser.
Entering value in Evacuate operating mode
Use the rotary knob to set pump capacity.
Entering value in Pressure control operating mode
Use rotary knob to set desired pressure.
Entering value in Automatic operating mode
Not necessary to enter value.
If a boiling point is detected in Automatic mode, after the system
regulates to this pressure, the pressure is reduced automatically to
speed up evaporation of the solvent (see Fig. 14).
1.) Start Automatic
operating mode
2.) Boiling point detected;
system regulates to this
pressure
3.) Automatic pressure
reduction
Fig. 14: Automatic function sequence
If you press the arrow key (see Fig. 11/7) during automatic
pressure reduction, the current pressure is applied as the new
setpoint pressure and the vacuum pump system regulates to
this pressure. The current setpoint pressure is shown in the
display in place of the arrow.
If you press again on the setpoint pressure value, automatic
pressure reduction is reactivated and the arrow appears in the
display after about 25 seconds.
36
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
Vacuum Pump System SC/SEM/SH/SR950
Operating vacuum pump system
Entering value in Function operating mode
The desired pressure curve is entered via data points that connect
the vacuum pump system to pressure ramps.
Fig. 15: Menu for Function operating mode
Entering data points (up to 12):
1.
Time interval since the last data point: ∆ t
2.
Setpoint pressure: p (mbar) / p (bar) / p (hPa) / p (Torr)
3. Additional options ("+" column) to influence the course of the
function:

CV1: Open coolant valve (accessory):

CV0: Close coolant valve (accessory):
 S: Jump – the system evacuates/ventilates to the required
pressure as quickly as possible.
 A: Automatic – Automatic detection of the boiling pressure
If the set limit pressure is reached without a vapor pressure,
the program goes to the next function step.
 A+: Automatic Plus – Automatic detection of the vapor
pressure with subsequent pressure reduction.
Line selection (see Fig. 15):

To change the line:
Turn the rotary knob.

To select a line for editing:
Press the rotary knob.
To edit a selected line:

To change columns:
(e.g. from ∆ t to p (mbar):
Press the rotary knob.
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
37
Operating vacuum pump system
Vacuum Pump System SC/SEM/SH/SR950

To change an entry:
Turn the rotary knob.
After the last column (+), the display automatically returns to
line selection and jumps to the next line.
If you are in input mode and have not entered any data within 3
seconds, the display automatically returns to line selection.
The function values of the data point table are stored in the
internal memory of the vacuum pump system when the
process starts, and are available again when there is a restart.
Changes to the function values (sampling point table) are
carried over directly from the PC software, which may be used
simultaneously.
Repeating/deleting sampling points:
The following symbols may be set in the column for the time
intervals under the value 00:00:00:

= Repetition. The desired number of repetitions can now
be specified in the field for the setpoint pressure.

… = Deletion of the data point.
In both cases, all subsequent sampling points are automatically
deleted.
Calling the stored data point tables:

Press the button to select data point tables (arrow in Fig. 15)
and select the required data point table.
You can now see the data point table that is stored under the
number.
Up to 10 different data point tables can be stored and called as
required. The number in the display (arrow in Fig. 15) indicates
the data point table that is currently selected.
Actuating the vacuum pump system (Paging)
When you press the circle symbol for the active process (Fig. 10/5,
page 32) in the hand terminal display, the LED next to the page
button (Fig. 17, page 40) on the vacuum pump system will blink.
The other way around, the hand terminal will answer with a signal
tone if you press the paging button of the vacuum pump system
(see chapter 8.2, page 40).
No wireless connection
If there is no wireless connection between the hand terminal and
the related vacuum pump system (for example if the vacuum pump
system is not switched on or the wireless connection is being
established or is interrupted):
38

The message "No connection" will blink in the hand terminal's
display (see Fig. 16);

An audible warning will be emitted if a button on the touchscreen is pressed.
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
Vacuum Pump System SC/SEM/SH/SR950
Operating vacuum pump system
Refer to chapter 10, table 9 for tips on resolving this problem.
Fig. 16: Display „No connection“
8.1.3. Changing batteries on the hand terminal
Necessary tool
Qty. Material
1
Phillips-head screwdriver No. 2
Tab. 5
1.
Loosen the six screws on the underside of the hand terminal.
2.
Remove the rear cover plate.
3.
Replace the batteries.
Refer to chapter 4.2, page 11, for required battery specifications.
Never use new and used batteries together. Batteries must
always be replaced all at the same time.
4.
Re-install cover plate.
5.
Dispose of batteries according to regulations.
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Operating vacuum pump system
Vacuum Pump System SC/SEM/SH/SR950
8.2. Operation without hand terminal
8.2.1. SC 950
The following actions can be taken directly on the vacuum pump
system when the hand terminal is removed (Fig. 17):
1
2
3
4
6

Stop the process;

Open and close the ventilation valve;

Open and close the high-performance condenser's coolant
valve (accessory).

Call the hand terminal (paging); the hand terminal will answer
with a signal tone.

Open/Close gas ballast valve via gas ballast switch (6)
(also possible with put on hand terminal):
- push once  open gas ballast valve, blue LED on
- push again  close gas ballast valve again, blue LED off
Stop process button
To open/to close ventilation
valve button
Call the hand terminal
button (paging)
Button to open/to close
coolant valve (accessory)
on the high-performance
condenser
Gas ballast switch
Fig. 17: Buttons on vacuum pump system SC 950
40
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Vacuum Pump System SC/SEM/SH/SR950
Operating vacuum pump system
8.2.2. SEM 950
The following actions can be taken directly on the vacuum pump
system (Fig. 18):
1
2
3
4
5
6

Switch on/off pump (1)

Open and close the ventilation valve (2)

Switch units on display (3)
mbar  hPa  Torr  mbar

Open and close coolant valve (accessory) for the highperformance condenser (4)

Set flow of the pump via rotary knob (5) (15% - 100%)

Open/Close gas ballast valve via gas ballast switch (6):
- push once  open gas ballast valve, blue LED on
- push again  close gas ballast valve again, blue LED off
Button on/off pump
To open/to close ventilation
valve button
Button to switch units on
display
Button to open/to close
coolant valve (accessory)
on the high-performance
condenser
Rotary knob (setting the
flow)
Gas ballast switch
Fig. 18: Buttons on vacuum pump system SEM 950
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41
Operating vacuum pump system
Vacuum Pump System SC/SEM/SH/SR950
8.2.3. SH/SR 950
The following actions can be taken directly on the vacuum pump
systems SH 950 and SR 950 (Fig. 19):

Set flow of the pump via rotary knob (5):
If the rotary knob is rotated to the left until it engages the
mechanical indent, the pump will rotate with a minimum
flow rate of 15%.
If the rotary knob is then rotated farther to the left (past the
mechanical indent), the vacuum pump system's pump will
be switched off.
5
6

Open/Close gas ballast valve via gas ballast switch (6):
- push once  open gas ballast valve, blue LED on
- push again  close gas ballast valve again, blue LED off

Switch off pump (i.e. also complete system) via the green
rocker switch at the bottom left of the base (see Fig. 5/9, p. 19
and Fig. 6/8, p. 21).
Rotary knob (setting the
flow)
Gas ballast switch
Fig. 19: Buttons on vacuum pump systems SH 950 and SR 950
42
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
Vacuum Pump System SC/SEM/SH/SR950
Operating vacuum pump system
8.3. Software (only SC950)
Please see the delivered CD for information on operating the
vacuum pump system via software.
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
43
Servicing
Vacuum Pump System SC/SEM/SH/SR950
9.
Servicing
9.1. Servicing schedule
Component
Vacuum pump
system
Diaphragms and
valve plates
Servicing interval
Regular inspection for external damage or
leaks
Replace when pumping capacity
decreases, or sooner
Tab. 6
9.2. Cleaning
When cleaning, make sure that no liquids enter the inside of
the housing.
9.2.1. Flushing vacuum pump system
Avoid damage to the vacuum system and personal
injury caused by poisoning or explosion
 When flushing the vacuum pump system with
inert gas, make sure that the gas ballast valve is
WARNING
closed so no reactive or explosive mixtures can
form.
 Before switching off the vacuum pump system, separate it from
the vacuum chamber and flush it with air (if necessary for
safety reasons: with an inert gas) under atmospheric
conditions (ambient pressure) for about five minutes.
Only SC/SEM 950:
If inert gas is used: connect the inert gas feed to the gas inlet
(Fig. 2/18, p. 13 or Fig. 4/15, p. 17) of the vacuum pump
system and close the gas ballast valve. Observe the safety
instructions in chapter 3.
9.2.2. Cleaning vacuum pump system
 Only clean vacuum pump system with a damp cloth and nonflammable cleaning agents.
9.2.3. Emptying collection flask on the suction and pressure
sides
Suction side
44
1.
Grasp the collection flask (Fig. 2/9, p. 13 or Fig. 4/7, p. 17,
Fig. 5/7, p. 19 and Fig. 6/6, p. 21) and simultaneously remove
attachment clamp 7 (or 5, 5 and 4); pull out collection flask.
2.
Dispose of contents in collection flask according to local
regulations. Then rinse out collection flask.
3.
Reattach collection flask.
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
Vacuum Pump System SC/SEM/SH/SR950
Servicing
Pressure side
1.
Grasp the collection flask (Fig. 2/8, p. 13 or Fig. 4/6, p. 17,
Fig. 5/6, p. 19 and Fig. 6/5,p. 21) and simultaneously remove
attachment clamp 7 (or 5, 5 and 4); pull out collection flask.
2.
Dispose of contents in collection flask according to local
regulations. Then rinse out collection flask.
3.
Reattach collection flask.
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
45
Servicing
Vacuum Pump System SC/SEM/SH/SR950
9.3. Replacing diaphragms and valve plates
Conditions
Tools and material

Pump disconnected from mains and de-energized.

Vacuum pump system is clean and free of hazardous materials

Hoses removed from pump’s pneumatic inlet and outlet.
Qty
1
1
1
1
1
1
Material
Phillips-head screwdriver No. 2
3-mm hexagon screwdriver
2.5-mm hexagon screwdriver
Open end wrench 7 mm
Service Set (see chapter 11, page 59)
Pencil
Tab. 7
Information on procedure
 Always replace diaphragms and valve plates together to
maintain the pump performance.
Health hazard due to dangerous substances
in the vacuum pump system and pump!
Depending on the substance transferred, caustic
WARNING burns or poisoning are possible.
 Wear protective clothing if necessary, e.g.
protective gloves.
 Flush vacuum pump system before replacing the
diaphragms and valve plates (see chapter 9.2.1,
page 44).
Danger of burns from hot pump parts
The pump head or motor may be hot even after the
pump has been shut off.
CAUTION
46
 Allow the pump to cool off after operation.
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
Vacuum Pump System SC/SEM/SH/SR950
Servicing
9.3.1. Removing the pump
Fig. 20: Accessing the pump in the SC 950 vacuum pump system
1
2
3
4
5
4x attachment screws
(grip assembly)
1x grip assembly
1x plug for gas ballast valve
1x plug for pressure switch
1x plug for resonance
sensors
1.
6
7
8
9
1x plug for voltage supply
2x spring steel clips
2x head connection fittings
4x attachment screws
(pump)
Loosen the four attachments screws (Fig. 21/1) and remove
the grip assembly (2).
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
47
Servicing
Vacuum Pump System SC/SEM/SH/SR950
In order to remove the grip assembly, you must first lift it
approximately 5 mm and then pull it away laterally over the
pump.
2. Loosen plugs 3, 4, 5 and 6 at the pump's electrical connection.
3. Loosen the suction-side and pressure-side head connections
from the pump:
To do this, first pull the two spring steel clips (7) from the head
connection fittings (8), then pull the two head connection
fittings out of the connection blocks.
4. Replace the O-rings (ø10 x 1.8) in the two connection fittings (8)
and properly dispose of the old O-rings.
5. Loosen the four attachment screws (9) and remove the pump.
9.3.2. Overview of pump parts
Fig. 21: Exploded drawing of pump SC 950
1
2
3
4
5
6
7
8
48
4x head screws
16x attachment screws
(head)
4x head plates
6x O-ring (ø10 x 2.5)
8x valve plates
6x valve plates
4x intermediate plates
4x diaphragms
9
10
11
12
13
14
15
16
2x attachment screws
(connection .1.2)
2x connection blocks .1.2
2x flat seals
2x attachment screws
(connection .50)
2x connection blocks .50
2x O-rings (ø7.65 x 1.78)
6x O-rings (ø18.77 x 1.78)
8x O-rings (ø24 x 2)
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
Vacuum Pump System SC/SEM/SH/SR950
Servicing
9.3.3. Disassembling head connection
Fig. 22: Disassembling the head connections
1.
Remove the head connections’ (10) and (13) attachment
screws (Fig. 23/9) and (12) and remove the head connections.
2. Remove O-rings (14) and flat seals (11).
9.3.4. Disassembling pump heads
Fig. 23: Marking the pump
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
49
Servicing
Vacuum Pump System SC/SEM/SH/SR950
1.
Head 1 (Fig. 24/I):
Use a lead pencil (M) to apply a single mark across the head
plate, intermediate plate, and compressor housing.
2. Head 2 (Fig. 24/II):
Use a lead pencil (M) to apply two marks across the head plate,
intermediate plate, and compressor housing.
3. Head 3 (Fig. 24/III):
Use a lead pencil (M) to apply three marks across the head
plate, intermediate plate, and compressor housing.
4. Head 4 (Fig. 24/IIII):
Use a lead pencil (M) to apply four marks across the head
plate, intermediate plate, and compressor housing.
During re-assembly, refer to the marks on the individual
heads to ensure that the parts are properly re-assembled.
5. Loosen the 16 attachment screws (Fig. 22/2) on the heads (1
to 4) and remove the heads (1 and 2 as well as 3 and 4).
6. Pull apart heads 1 (Fig. 25/I) and 2 (II) and heads 3 (III) and 4
(IIII) and remove O-rings (4).
Fig. 24: Removing the O-rings
7. On all four heads, loosen the head screw (Fig. 26/1) in the
head plate (3) and remove the head plate from the
intermediate plate (7).
50
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Vacuum Pump System SC/SEM/SH/SR950
Servicing
Fig. 25: Exploded drawing of pump heads 1 and 2
9.3.5. Replacing the diaphragms and valve plates
1. Manually remove the four diaphragms (Fig. 27/8) by turning
them in the counterclockwise direction.
Use caution to prevent the shim rings (17) located between
the diaphragm and the connecting rod from falling into the
pump housing. The shim rings (17) must be installed in the
same quantity as before to ensure the pump's pneumatic
performance.
Fig. 26: Replacing the diaphragm
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51
Servicing
Vacuum Pump System SC/SEM/SH/SR950
2. Remove from the intermediate plates (Fig. 26/7) the valve
plates (5) and (6) as well as the O-rings (15) and (16).
3. Manually screw the new diaphragms (Fig. 27/8) into the
connecting rods’ threads and tighten to hand tightness.
Before you fully tighten the diaphragms, you are
recommended to move the diaphragm to the peak position
(before it reverses).
4. Insert the new valve plates (Fig. 26/5) and (6) and the new Orings (15) and (16) into the intermediate plates (7).
The upper and lower sides of the valve plates are identical.
The black O-rings (15) and (16) must be placed into the
intermediate plate of head 4 (see Fig. 25)!
5. Place head plate (Fig. 26/3) onto the intermediate plates (7),
observing the pencil marks (Fig. 24/M).
Fig. 27: Aligning the
disk spring
6. Carefully tighten the head screw of each head plate (Fig. 26/1).
Use light force and tighten only to hand-tightness (tightening
torque: 60 Ncm).
Refer to Fig. 28 for arrangement and alignment of disk
springs and the screw's washer.
9.3.6. Assembling heads and head connection
1. Place three O-rings (Fig. 25/4) into each of the head
connection holes.
The three black O-rings (4) must be placed into the
connection holes between head 3 and head 4!
2. Press together heads 1 and 2 (Fig. 24/I and II) and heads 3
and 4 (III and IIII).
3. Place heads 1 and 2 and heads 3 and 4 onto the compressor
housing; alternately tighten attachment screws (Fig. 22/2) to
hand-tightness (tightening torque: 3.5 Nm).
4. Insert O-rings (Fig. 24/14) and flat seals (11) into the grooves
or depressions in the head plates.
5. Reinstall the head connections:
To do this, manually tighten the head connections’ attachment
screws to hand-tightness.
(Fig. 23/9 and 12).
Before assembling the head connections, make sure that the
two front attachment screws (Fig. 21/9) are inserted into the
foot plate. This is required in order to later re-fasten the pump
in the vacuum pump system.
6. Properly dispose of the old diaphragms, valve plates, and Orings.
52
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Vacuum Pump System SC/SEM/SH/SR950
Servicing
9.3.7. Final steps
1. Place the pump back into the vacuum pump system and
tighten the four attachment screws (Fig. 21/9) to handtightness.
2. Install the suction-side and pressure-side head connections
back onto the pump:
To do this, first insert the two head connection fittings (8) into
the connection blocks and then fasten them with the two spring
steel clips (7).
3. Put plugs 3, 4, 5 and 6 back onto the pump's electrical
connection.
4. Put the grip assembly (2) back onto the vacuum pump system
and tighten the four attachment screws (1) to hand-tightness.
5. Reconnect suction and pressure lines to the vacuum pump
system.
7. Reconnect the vacuum pump system to the mains power.
If you have any questions about servicing, call your KNF technical
adviser (see last page for contact telephone number).
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
53
Troubleshooting
Vacuum Pump System SC/SEM/SH/SR950
10. Troubleshooting
Extreme danger from electrical shock!
 Disconnect the pump power supply before working
on the pump.
DANGER  Make sure the pump is de-energized and secure.

Vacuum pump system as a whole: see table 9.

Only SC 950:
Hand terminal: see table 10.

Only SC 950:
Software operation: see table 11.
Vacuum pump system as a whole
Problem
Cause
Vacuum pump system is
switched on, but the mains
switch does not light up.
Mains cable not plugged in.  Plug the mains cable for the vacuum
pump system into a properly
grounded power socket.
No current in electricity
 Check the electricity supply.
network.
Vacuum pump system
1. Find and eliminate the cause of the
fuses blown.
overload.
Required vacuum not
Leaks in vacuum chamber.
generated even though pump
is running.
O-ring is not sitting
correctly in the slot on the
suction side of the
collection flask.
54
Solution
2.
Replace the mains fuse(s) of the
vacuum pump system:

Push the locking clip on the fuse
drawer down (Fig. 2/17, p. 13 or
Fig. 4/14, p. 17, Fig. 5/13, p. 19 and
Fig. 6/12, p. 21) and pull the drawer
out.

Replace the defective fuse(s)
(for fuse specifications see chapter
4.1, page 9f; for fuse order numbers
see chapter 11, p. 59).

Push the fuse drawer back in until it
clicks into position.
1.
Run a test by closing the gas inlet
(Fig. 2/19, p. 13 or Fig. 4/16, p. 17,
Fig. 5/14, p. 19 and Fig. 6/13, p. 21).
If the pump reaches the required
vacuum, this confirms the presence
of leaks in the vacuum chamber.
2.
Eliminate leaks in the vacuum
chamber.
 Adjust O-ring.
 Replace if defective (for order
number for O-ring, see chapter 11,
p. 59).
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
Vacuum Pump System SC/SEM/SH/SR950
Troubleshooting
Vacuum pump system as a whole
Problem
Cause
Solution
Leaks in hose connection.
 Check hoses are sitting correctly on
hose nipples.
 Replace any leaky hoses.
 Replace any damaged hose nipples.
 For ordering numbers see chapter
11, page 59.
 Temporarily close the ventilation
connection (Fig. 2/18, p. 13 or
Fig. 4/15, p. 17). If this stops the
leak, leaks are present in the venting
valve. In this case:
 Flush the venting valve:
1. Close the gas inlet (Fig. 2/19 or
Fig. 4/16).
Only SC/SEM 950:
Leaks in venting valve.
Condensation in pump
head.
2.
If necessary for safety reasons:
Connect inert gas to ventilation
connection. Observe the safety
instructions in chapter 3.
3.
Run the vacuum pump system (SC
950 in evacuation mode) at 100%
pump capacity.
4.
Re-open the gas inlet.
 If problem persists, contact KNF
Service.
 Open gas ballast and flush pump
heads
 Dry system with fresh air or, if
necessary for safety reasons, with
an inert gas:
1. Using inert gas: Connect inert gas
source with gas inlet (Fig. 2/19,
p. 13 or Fig. 4/16, p. 17, Fig. 5/14,
p. 19 and Fig. 6/13, p. 21) and start
system up in evacuation mode
(100% capacity). Observe the safety
instructions in chapter 3.
2.
Using air: Open gas line (Fig. 2/19,
p. 13 or Fig. 4/16, p. 17, Fig. 5/14,
p. 19 and Fig. 6/13, p. 21) to the
surrounding environment and start
system up in evacuation mode
(100% capacity).
3.
Close the gas inlet after 30 seconds,
and leave the vacuum pump system
running for 30 seconds under
vacuum.
4.
Repeat this process 3–5 times.
 If this problem occurs frequently,
place the vacuum pump system at a
higher level than the vacuum
chamber.
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
55
Troubleshooting
Vacuum Pump System SC/SEM/SH/SR950
Vacuum pump system as a whole
Problem
Cause
Solution
Only SC/SEM/SH 950:
Risk of bursting of high-performance
Gas outlet blocked on high- condenser!
performance condenser.
 Eliminate blocking of gas outlet.
Worn diaphragms or valve  Replace diaphragms and valve
plates.
plates (chapter 9.3).
Replaced diaphragms and  Check that the correct diaphragm
valve plates.
spacers are placed under the
diaphragms.
 If necessary, carefully tighten the
pump head fixing screws (Fig. 21/2,
p. 48) in diagonally opposite
sequence.
Gas ballast still open
 Close gas ballast
Pump not activated on
Only SC 950:
 Make connection.
process start-up, in spite of
Hand terminal or software
pressure decrease command. not connected to vacuum
pump system.
Overcurrent protection of
 Reset by switching the vacuum
vacuum pump system has
pump system off and back on.
been activated.
 Check that there is no object
blocking the vacuum pump system
fans (Fig. 2/12 and 13, p. 13 or
Fig. 4/10 and 11, p. 17, Fig. 5/10 and
11, p. 19 and Fig. 6/9 and 10, p. 21)
and make sure that adequate supply
and removal of cool air is provided.
 Find and eliminate any other cause
of pump overload.
Tab. 8
Only SC 950:
Hand terminal
Problem
Cause
Solution
Hand terminal cannot be
removed from vacuum pump
system.
Hand terminal display fails to
light up.
Transport fastener has not
been removed.
 Remove transport fastener (see
chapter 6.1).
The hand terminal display
keeps showing "No connection"; if a button of the touchscreen is actuated a signal
tone sounds.
56
Hand terminal not switched  Switch hand terminal on.
on.
Batteries of hand terminal
 Charge batteries by placing the
have run down.
terminal in the holder provided on
the vacuum pump system, with the
system switched on.
 Alternatively, operate the terminal
via the power supply.
Vacuum pump system is
 Switch the vacuum pump system on
switched off.
at the mains switch. The mains
switch should light up.
The hand terminal is
 Use the page function (see Actuating
designed for use with a
the vacuum pump system, p. 38) to
different SC 950 vacuum
check whether the right hand termipump system.
nal is being used.
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
Vacuum Pump System SC/SEM/SH/SR950
Troubleshooting
Hand terminal
Problem
Vacuum pump system does
not respond to commands
input at the hand terminal
after removal from the
system, even though the "No
connection " is no longer lit
up and a pressure is
displayed.
Acoustic alarm sounds on
hand terminal.
Marked decrease in operating
time for the hand terminal in
wireless mode.
Vacuum pump system cannot
be activated, even with the
hand terminal placed in the
holder provided.
Pressure display shows
implausible values.
Cause
Solution
Problem with wireless
connection.
 Check whether the hand terminal is
being operated outside the wireless
connection range.
 Check that the wireless connection
is not obstructed by any electrical
devices or metal objects.
 Otherwise, to confirm that the problem lies in the wireless connection,
place the hand terminal in the holder
provided on the vacuum pump
system.
 Contact KNF Service.
 Use the page function (see Actuating
the vacuum pump system, p. 38) to
check whether the right hand terminal is being used.
Defective wireless module.
The hand terminal is
designed for use with a
different SC 950 system,
which is currently in
operation.
Batteries low.
Batteries have reached
limit of their useful life.
 Charge batteries by placing the
terminal in the holder provided on
the vacuum pump system, with the
system switched on.
 Alternatively, operate the terminal
via the power supply.
 Change batteries (see chapter 8.1.3,
p. 39).
Soiled contacts on the
 Clean contacts.
bottom of the hand terminal
or in the holder for the
terminal on the vacuum
pump system.
Unit of pressure for display  Set desired unit of pressure.
has been changed.
Leaks in system.
 See Tab. 9, "Required vacuum not
generated even though pump is
running”.
Recalibration of pressure
 Contact KNF Service.
sensor required.
Tab. 9
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
57
Troubleshooting
Vacuum Pump System SC/SEM/SH/SR950
Only SC 950:
Software operation
Problem
Cause
Solution
PC software unable to
connect to vacuum pump
system.
Vacuum pump system not
switched on.
USB connection between
system and PC is not
operating correctly.
 Switch vacuum pump system on.
Pressure display shows
implausible values.
Unit of pressure for display
has been changed.
Leaks in system.
Recalibration of pressure
sensor required.
 Check correct connection of USB
cable. If necessary, pull out the USB
cable and reinsert (USB interface
reset).
 Set desired unit of pressure.
 See Tab. 9, "Required vacuum not
generated even though pump is
running”.
 Contact KNF Service.
Tab. 10
Fault cannot be rectified
If you are unable to identify the cause of the problem, please send
the vacuum pump system to KNF Customer Service (see last page
for the address).
1. Flush the vacuum pump system to free the pump head, tubing
and glas vessels of dangerous or aggressive gases (see
chapter 9.2.1, page 44).
2. Clean the vacuum pump system (see chapter 9.2.2, page 44).
3. Send the vacuum pump system, together with completed
Health and Safety Clearance and Decontamination Form
(Chapter 13), to KNF stating the nature of the transferred
medium.
58
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Vacuum Pump System SC/SEM/SH/SR950
Spare parts and accessories
11. Spare parts and accessories
11.1. Spare parts
Spare parts Pump
A spare parts kit contains all parts needed for complete overhaul of
the pump head:

4x diaphragms

8x valve plates

6x valve plates

2x flat seals

8x O-rings (ø 24 x 2)


-
6 x green
-
2 x black
6x O-rings (ø 18.77 x 1.78)
-
5 x green
-
1 x black
6x O-rings (ø 10 x 2.5)
-
3 x green
-
3 x black

2x O-rings (ø 7.65 x 1.78), green

2x O-rings (ø 10 x 1.8), black
Spare parts kit for system type
SC/SEM/SH/SR 950
Order-No.
126111
Tab. 11
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
59
Spare parts and accessories
Vacuum Pump System SC/SEM/SH/SR950
Other spare parts
Spare part
Battery set for hand terminal
(see chapter 8.1.3, page 39)
Power supply for hand terminal
USB cable
Mains cable D
Mains cable CH
Mains cable GB
Mains cable USA/JP
Spare parts kit tubes SC 950
Spare parts kit tubes SEM 950
Spare parts kit tubes SH 950
Spare parts kit tubes SR 950
Hose nipple gas inlet (ID 10)
Only SC/SEM 950:
Hose nipple ventilating (ID 4)
Only SC/SEM/SH 950:
Hose nipple gas outlet for high
performance condenser: gas
connection (ID 10)
Only SC/SEM/SH 950:
Hose nipple for high performance
condenser: coolant connection (ID 8)
O-ring adapter on collection flask
Collection flask 500 ml (coated)
Flask clamp
Fuse T 2.5
Order-No.
117427
302033
136174
026363
027523
029866
027524
126331
126332
126333
126334
124548
057594
026237
025981
047744
121415
025968
027575
Tab. 12
11.2. Accessories
Accessory
Coolant valve
Color sticker for indicating correct
match between hand terminal and
vacuum pump system*
Chemical-resistant protective film for
hand terminal display
Contact cover set (SC 950 only)**
Order-No.
117121
117433
117407
126335
* For situations in which several SC 950 vacuum pump systems are
operated within the wireless connection range.
** The contact cover is used to protect the hand terminal contacts from
contamination when the hand terminal is taken off.
Tab. 13
60
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Vacuum Pump System SC/SEM/SH/SR950
Returns
12. Returns
Pumps and systems used in laboratories and process-based
industries are exposed to a wide variety of conditions. This means
that the components contacting pumped media could become
contaminated by toxic, radioactive, or otherwise hazardous
substances.
For this reason, customers who send any pumps or systems back
to KNF must submit a Health and safety clearance and
decontamination form in order to avoid a hazardous situation for
KNF employees. This Health and safety clearance and
decontamination form provides the following information, among
other things:

physiological safety

whether medium-contacting parts have been cleaned

whether the equipment has been decontaminated

media that have been pumped or used
To ensure worker safety, work may not be started on pumps or
systems without a signed Health and safety clearance and
decontamination form.
For optimal processing of a return, a copy of this declaration
should be sent in advance via e-mail, regular mail, or fax to KNF
Customer Service (refer to final page for address). In order to avoid
endangering employees who open the shipment's packaging,
despite any residual hazards, the original version of the Health and
safety clearance and decontamination form must accompany the
delivery receipt on the outside of the packing.
The template for the Health and safety clearance and
decontamination form is included with these Operating Instructions
and may also be downloaded from the KNF website.
The customer must specify the device type(s) and serial number(s)
in the Health and safety clearance and decontamination form in
order to provide for the unambiguous assignment of the
Declaration to the device that is sent to KNF.
In addition to the customer's declaration of physiological safety,
information about operating conditions and the customer's
application are also of importance to ensure that the return
shipment is handled appropriately. Therefore, the Health and
safety clearance and decontamination form requests this
information as well.
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
61
Health and safety clearance and decontamination form
Vacuum Pump System SC/SEM/SH/SR950
13. Health and safety clearance and
decontamination form
62
Translation of original Operating Instructions, English, KNF 125549-125552 04/16
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