ASA Electronics H400 User manual

H400 user manual
Created by: Martin Puchner 20.05.2019
version: 1.0
page 1 of 27
printed: 26.08.2019
9600005B
ASA H400
400mm hyperbolic telescope f/2.4
0200505C

H400 user manual
Created by: Martin Puchner 20.05.2019
version: 1.0
page 2 of 27
printed: 26.08.2019
9600005B
Table of contents
1 General safety-relevant notes........................................................................................................................... 4
General ...................................................................................................................................................... 4
Operation as intended............................................................................................................................... 5
Abusive Operation..................................................................................................................................... 5
Warranty and liability................................................................................................................................ 5
Distributor, CE marking ............................................................................................................................. 6
Target audience......................................................................................................................................... 6
General safety notes.................................................................................................................................. 6
Explanation of indication signs and safety hints in this manual................................................................ 7
Safety related hazards and behaviour....................................................................................................... 7
Operator’s obligations............................................................................................................................... 8
Process specific hazards ............................................................................................................................ 8
2 Product description ......................................................................................................................................... 10
Technical Specifications and features ..................................................................................................... 10
2.1.1 Dimensions and Weight................................................................................................................... 10
2.1.2 Optical Specifications ...................................................................................................................... 11
3 Delivery contents............................................................................................................................................. 12
4 Optional accessories........................................................................................................................................ 12
5 Unpacking........................................................................................................................................................ 12
6 Physical installation ......................................................................................................................................... 13
Dew cap................................................................................................................................................... 13
Electric mirror cover................................................................................................................................ 13
Telescope mounting plate....................................................................................................................... 13
Lifting the telescope ................................................................................................................................ 14
7 Collimation ...................................................................................................................................................... 15
Collimation of the secondary mirror ....................................................................................................... 16
Collimation of the primary mirror ........................................................................................................... 17
8 Wiring .............................................................................................................................................................. 20
Focuser and electric cover....................................................................................................................... 20
Included cables........................................................................................................................................ 21
Fans.......................................................................................................................................................... 21
9 Maintenance.................................................................................................................................................... 22
Removing the main mirror cell................................................................................................................ 22
Cleaning the main mirror......................................................................................................................... 24

H400 user manual
Created by: Martin Puchner 20.05.2019
version: 1.0
page 3 of 27
printed: 26.08.2019
9600005B
10 Software ...................................................................................................................................................... 26
Focusing................................................................................................................................................... 26
Electric Cover (optional).......................................................................................................................... 27

H400 user manual
Created by: Martin Puchner 20.05.2019
version: 1.0
page 4 of 27
printed: 26.08.2019
9600005B
1General safety-relevant notes
General
This user manual serves as training material and relieves operating the machine as intended and safely.
The proper operation and conscientious maintenance are essential for obtaining the reliability and operational
capability of the machine. The safety of all persons who get in touch with this machine highly depends on
mastering the operation of the machine.
So, read this manual before the initial operation!
This user manual enables you to learn everything about the machine’s capabilities before the initial operation and
how to operate it as intended. It contains important hints, to ensure a functional and economic Operation.
This manual is not only an essential entry point for new operators, but also contains useful hints and suggestions
for advanced operators. It is an essential reference text for all users of this machine. By reading the manual
dangers can be avoided,
work processes can be optimized and accelerated,
repair costs and downtimes can be minimized,
reliability and lifetime can be increased.
This user manual should also be read by machine owners and persons responsible for operation.
In some chapters there are important safety –and hazard hints that prepare you of eventually occurring
dangerous situations. Reading this manual during operation is too late.
Also consider the following principles
Judicious and careful working is the best protection against accidents
This user manual should be stored accessible near the machine.
Purview of this manual:
This user manual was made appropriate to the following technical standards:
•Machinery directive (2006/42/EG)
•Electromagnetic compliance (2004/108/EG)
•Low-voltage directive (2006/95/EG)
Knowledge about basic safety regulations is essential for the safe and unimpeded operation of this machine. This
manual contains the most important hints, to operate this machine safely.
This user manual, especially the safety hints, have to be considered by all persons who work with this machine.
Furthermore, consider the safety regulations and regulations for accident prevention of the application site.

H400 user manual
Created by: Martin Puchner 20.05.2019
version: 1.0
page 5 of 27
printed: 26.08.2019
9600005B
Operation as intended
This machine must only be used for observing objects in the sky.
Every action differing from the intended operation is an abusive operation is prohibited.
Abusive Operation
Examples for abusive operation:
•Every operation that differs from the operation as intended, as described in the previous chapter, or every
operation that extends it.
•When the machine is operated beyond safety and danger requirements considering the hints in this
manual. This also concerns errors, caused by deficient or not-properly executed or unauthorized work on
this machine.
•Every modification, overriding or putting safety installations of the machine out of operation
•When the machine is operated in a technically not impeccable condition
•When technical defects are unremedied before initial operation
•Usage of inadmissible facilities and tools
The manufacturer is not liable for detriments caused by abusive operation
Warranty and liability
Basically the general terms of delivery and sales of the manufacturer are valid.
Warranty and liability claims for personal or material damages are excepted if they are caused by one of the
following reasons:
•Abusive operation of the machine
•Inappropriate manipulation, initial operation, usage or maintenance of the machine
•Operation with defective safety installations
•Disregard of hints in the manual concerning operation or maintenance of the machine
•Inappropriate physical modifications of the machine
•Poor observation of machine parts that underlie attrition
•Inappropriately performed repairs

H400 user manual
Created by: Martin Puchner 20.05.2019
version: 1.0
page 6 of 27
printed: 26.08.2019
9600005B
Distributor, CE marking
Type designation: H400
Distributor: ASA Astrosysteme GmbH
Galgenau 19
A-4212 Neumarkt i. M.
The CE marking is located on the type label of the machine.
Target audience
This user manual is for persons that are liable for operation, maintenance, cleaning of this machine and who have
the necessary qualifications and capabilities to realize the possible hazards of working with this machine.
This also includes the knowledge of relevant instructions and generally admitted safety regulations.
General safety notes
Important!
Always keep this manual at the application site! This complete document
must be accessible for the intended staff. The operational staff must know
where this document is located.
The machine must only be operated and maintained by competent
personnel, who knows the safety arrangements and residual danger and who
became instructed.
Every action that differs from the operation as intended is prohibited. That
also includes components of this machine.
At the time of sale, this machine and all of its components are state of the art.
Nevertheless there are residual risks. The risks for health and persons have
been minimized constructively as good as possible.
This document contains important hints and helps to increase safety for
operation and maintenance.
Following this manual helps to prevent danger and increasing the lifetime of
this machine. Modifying the document is prohibited.
The documentation of each subcontractor and particularly safety hints have
to be abided too.
The manufacturer is not liable for damages caused by not considering the
user manual or inappropriate usage.
This document was made with diligence. Anyhow there might be little
contentual divergences.

H400 user manual
Created by: Martin Puchner 20.05.2019
version: 1.0
page 7 of 27
printed: 26.08.2019
9600005B
Explanation of indication signs and safety hints in this manual
Indication sign for simplification of an activity, application hints and other useful
information.
This sign indicates actual hazard for health and life of persons. Adopt measures to
avoid or reduce these hazard and risks.
Not considering these hints might lead to health-damaging consequences, up to lethal
injuries.
Signal word
meaning
DANGER!
Indicates an actual hazard with a high risk. Not consider
Not considering these hints might lead to health-damaging consequences, up to lethal
injuries.
WARNING
Indicates a hazard with a moderate risk. Not considering these hints might lead to
health-damaging consequences, up to lethal injuries.
ATTENTION
Indicates a hazard with a low risk. Not considering these hints might lead to light to
moderate injuries.
Safety related hazards and behaviour
The following signs have to be placed or are placed on the machine or its components:
Sign
Meaning
Location
Behaviour
Caution against optical
radiation
Eyepiece-/camera
mounting point
Do not look into the telescope
when the telescope is aiming on
a bright object. The bright light
might harm your eyes.
Hints and signs located on the machine must be considered in any case.
Keep all the signs and hints located on the machine in an impeccable and legible
condition.

H400 user manual
Created by: Martin Puchner 20.05.2019
version: 1.0
page 8 of 27
printed: 26.08.2019
9600005B
Operator’s obligations
Every person who works with this machine is liable of:
•Considering company safety regulation
•Considering the general regulations for occupational safety and accident prevention
•Reading this manual and confirming to understand it with a signature
•Considering the machine-specific regulations like this manual
•Considering all additional user information such as acoustic and optical warning signs, floor signalling,
hint signs, prohibition- and mandatory signs
•Wearing the personal protective equipment
•Performing the delegated work tasks prudently and reliably
•Permanent observation of the technical condition of the machine, concerning apparent damages and
defects and altered operational behaviour
•Reporting damages and defects immediately to the supervisor
•Only using impeccable and suitable tools and equipment
The personnel need to read all the chapters of this manual.
Process specific hazards
The operator should be informed about the following hints before initial operation and should comply
with them at all time.
Always observe the manufacturer’s safety notes!
CAUTION
Never work negligently or recklessly on the machine!
Watch out for persons located in the machine’s range of movement!
Switch off the machine’s power supply before cleaning it!
Take care of not touching the telescope fans when they are switched on! This might cause hand
injuries.
CAUTION
When using oils, lubricant, detergent or other chemical substances always consider the products
safety regulations (safety data sheets)!
Consider the environment-friendly usage and correct disposal of these products.
DANGER!
Do not look into the telescope when it is aiming on a bright object. The bright light might harm
your eyes.

H400 user manual
Created by: Martin Puchner 20.05.2019
version: 1.0
page 9 of 27
printed: 26.08.2019
9600005B
DANGER!
Always protect the telescope’s optics from direct exposure of the sun. The bundled light might not
only harm your eyes, but can also cause fire at objects near the focus.

H400 user manual
Created by: Martin Puchner 20.05.2019
version: 1.0
page 10 of 27
printed: 26.08.2019
9600005B
2Product description
The optical design is a hyperbolic primary mirror in combination with a 116mm 4lens corrector in 2 groups. It
offers a very wide field and fast focal ratio. It is thus very suitable for sky surveys and short exposure times.
Technical Specifications and features
2.1.1 Dimensions and Weight
Weight (including focuser, corrector, dew cap and mirror cover): 55kg
All dimensions in mm.
Figure 1 - Dimensions

H400 user manual
Created by: Martin Puchner 20.05.2019
version: 1.0
page 11 of 27
printed: 26.08.2019
9600005B
2.1.2 Optical Specifications
Guaranteed surface quality
λ/24 RMS wave front accuracy (94% Strehl)
A quality certificate including an interferogram comes with the telescope.
If you want to learn more about ASA’s optics manufacturing and testing methods click here.
Main Data
Focal length 960mm
f-number 2.4
Diameter 400
Lens Diameter 116mm
Back Focus 109.56mm
Central Obscuration 45% (diameter), 20% (area)
Mirror Material Fused Silica (quartz), ultra-low thermal expansion 0.5e-6/°C
Maximum CCD 70mm diagonal (4.2° field of view)

H400 user manual
Created by: Martin Puchner 20.05.2019
version: 1.0
page 12 of 27
printed: 26.08.2019
9600005B
3Delivery contents
•400mm f/2.4 hyperbolic telescope
•Corrector
•AAF5 Focuser
•ASA Device HUB (with 5m USB and power supply cable)
•Collimation laser
4Optional accessories
•Dew cap
•Electrical mirror cover (also contains dew cap)
•Customer specific camera adapter
5Unpacking
The H400 Telescope is packed in a wooden crate. To open it, cut the white straps and lift the top lid. After that
you can remove the sidewalls by just lifting them.
Figure 2 - Packaging

H400 user manual
Created by: Martin Puchner 20.05.2019
version: 1.0
page 13 of 27
printed: 26.08.2019
9600005B
6Physical installation
Dew cap
The dew cap (if ordered) is not mounted onto the telescope when delivered. Mount it by screwing in the 8 M5
screws.
Figure 3 - mount dew cap
Electric mirror cover
The electric mirror cover (if ordered) comes already mounted onto the dew cap. When mounting the dew cap
make sure that the mirror cover drive is located opposite to the focuser.
Telescope mounting plate
The included telescope dovetail plate is compatible with ASA’s DDM85 dovetail system. If you want to use
another mounting plate –just screw it onto the included one.
Figure 4 - telescope mounting plate

H400 user manual
Created by: Martin Puchner 20.05.2019
version: 1.0
page 14 of 27
printed: 26.08.2019
9600005B
Lifting the telescope
If you have a crane you can lift the telescope by using the included lifting belt.
Figure 5 - lifting telescope

H400 user manual
Created by: Martin Puchner 20.05.2019
version: 1.0
page 15 of 27
printed: 26.08.2019
9600005B
7Collimation
Avoid putting the telescope into a horizontal or even lower position during collimation to ensure
that the primary mirror lies firmly inside the mirror cell.
Screw the 2 inch adapter onto the focuser, insert the collimation laser and switch it on.
ATTENTION
Do not look directly into the laser beam! This might harm your eyes. Consider the safety
instructions delivered with the laser!
Figure 6 –insert collimation laser

H400 user manual
Created by: Martin Puchner 20.05.2019
version: 1.0
page 16 of 27
printed: 26.08.2019
9600005B
Collimation of the secondary mirror
To collimate the secondary mirror, tilt it by using the screws marked with „1“, until the laser beam points exactly
to the centre of the primary mirror. There is a triangular sticker on the primary mirror to mark the centre.
Figure 7 –screws for secondary mirror collimation
Figure 8 –before collimation Figure 9 –after collimation

H400 user manual
Created by: Martin Puchner 20.05.2019
version: 1.0
page 17 of 27
printed: 26.08.2019
9600005B
Collimation of the primary mirror
To get access to the main mirror cell, you need to remove the back cover plate by removing these screws:
Figure 10 –back cover plate screws

H400 user manual
Created by: Martin Puchner 20.05.2019
version: 1.0
page 18 of 27
printed: 26.08.2019
9600005B
Now you need to screw the four screws shown in the figure below a bit in, to achieve some clearence between
mirror and securing discs. Therefor loosen the counter-nuts and screw the screws in with an allen key.
Figure 11 - adjust mirror securing discs
Here is a detailed illustration of the mirror cell. Marked red you can see one of the mirror securing discs, which
prevents the mirror from tilting to the front, when the telescope is pointing below the horizon.
Figure 12 - mirror cell - mirror securing discs
By screwing the four screws in you gain more clearance between securing disc and mirror. You need that
clearance because you need to tilt the mirror a bit for collimation.

H400 user manual
Created by: Martin Puchner 20.05.2019
version: 1.0
page 19 of 27
printed: 26.08.2019
9600005B
Now you can tilt the primary mirror for collimation by using the screws, shown in the following figure. Of course
you need to loosen the counter nuts first.
Figure 13 - primary mirror collimation screws
Tilt the primary mirror so that the laser beam points back to its origin. Then secure the adjustment by tightening
the counter nuts.
After collimation you need to secure the primary mirror again by putting the securing discs back to their optimal
positions. Do this by screwing the four screws, shown in figure 11 back until you feel a resistance. Now the
cover ring touches the edges of the primary mirror. To gather a bit clearance again, turn these screws about half
a rotation back again and secure them by tightening the counter nuts.
Now mount the back cover again.

H400 user manual
Created by: Martin Puchner 20.05.2019
version: 1.0
page 20 of 27
printed: 26.08.2019
9600005B
8Wiring
Focuser and electric cover
The H400 Telescope uses the ASA Device Hub to communicate with the user computer. The device hub provides
5 ports for ASA devices. Each of these ports contains a 24VDC power supply and a CAN-bus connection.
So the device hub has to be connected to a 24VDC power supply. It provides a USB interface to connect it to
your computer.
Connect the focuser to one of the ports of the ASA device hub (DEV01-DEV05).
Connect the electric cover (optional) to one of the ports of the ASA device hub (DEV01-DEV05).
Connect the USB cable to the USB port of the ASA device hub. Connect the other end to a USB port of your
computer.
Connect the 24VDC power supply cable to the 24VDC IN connector of the ASA device hub. Connect the other
end to a 24VDC power supply. If you only use these 2 devices (focuser and cover) with the device hub –a 24VDC
power supply with at least 2A is sufficient. If you add additional ASA devices, such as a filter wheel or derotator
to the hub, you need to connect a more powerful power supply (considering the appropriate device
specifications).
Figure 14