Peak Scientific MS Bench SCI 1 User manual

MS Bench G SCI 1 Service Manual Rev 3 RSID 3025 EN 20/11/20
MS Bench G SCI 1
Service Manual

Contents
Change History 3
How to use this Manual 3
Safety Notices 4
Symbols 4
Safety Notice to Users 4
Safely Isolated Condition 5
Safe State After Repair 6
Principle of Operation 8
On Demand Gas 8
System Description 8
Service Requirements 9
Service Schedule 9
Product Overview 10
PCB & Electrical Panel Layout 11
Compressor Inlet Filter Element Replacement 12
Twin Filter Element Replacement 13
RAC Filter Element Replacement 14
Dryer Filter Element Replacement 15
Compressor Replacement 16
Pressure Switch Overview 17
Pneumatic Diagram 18
Electrical Schematics 19
Service Flow Charts 25
Cleaning 30
Troubleshooting 31
Page 2

Page 3
Change History
Rev Comment Name Date
1 Initial Release L. Couttie 06/06/2019
2 CSA Feedback Updates L. Couttie 20/06/2019
3 Power Cord Update L. Couttie 20/11/2020
How to use this Manual
This manual is intended for Field Service Engineers and technically competent end
users and has been written as a reference document where you can skip to the relevant
information.
Users can refer to the contents page to find the relevant information.
Please review each of the following sections carefully.
Thank you for selecting Peak Scientific to meet your gas generation needs, and should
you require any further assistance or support please do not hesitate to contact Peak
Scientific or the Peak Partner from which you purchased your generator.

WARNING
Page 4
CAUTION
WARNING
WARNING
WARNING
Safety Notices
Peak Scientific Instruments cannot anticipate every possible circumstance which may
represent a potential hazard. The warnings detailed within this manual refer to the most
likely potential hazards, but by definition cannot be all inclusive. If the user employs an
operating procedure, item of equipment or a method of working which is not specifical-
ly recommended by Peak Scientific, the user must ensure that the equipment will not
be damaged or become hazardous to persons or property.
Symbols
This manual uses the following symbols to highlight specific areas important to the safe
and proper use of the generator.
A WARNING notice denotes a hazard. It calls attention to an operating procedure,
process or similar, which if not correctly performed or adhered to, could cause
personal injury or in the worst case death. Do not proceed beyond a WARNING
notice until the indicated conditions are fully understood or met.
A CAUTION notice denotes a hazard. It calls attention to an operating procedure,
process or similar, which if not correctly performed or adhered to, could cause
damage to the generator or the application. Do not proceed beyond a CAUTION
notice until the indicated conditions are fully understood or met.
Caution, risk of electric shock. Ensure the generator has been safely isolated before
proceeding.
Safety Notice to Users
These instructions must be read thoroughly and understood before
installation and operation of your Peak Generator. Use of the generator
in a manner not specified by Peak Scientific MAY impair the SAFETY
provided by the equipment.
When handling, operating or carrying out any maintenance, personnel
must employ safe engineering practices and observe all relevant local
health and safety requirements and regulations. The attention of UK
users is drawn to the Health and Safety at Work Act 1974, and the
Institute of Electrical Engineers regulations.
If the equipment is used in a manner not specified by the manufacturer,
the protection provided by the equipment may be impaired.

Page 5
Safely Isolated Condition
Definition: The unit is in a Safely Isolated Condition when it is disconnected from its
application, fully de-pressurised and isolated from the electrical supply. Directions for
isolating the generator are shown below.
Failure to place the generator in a safely isolated condition when
instructed to do so may lead to personal injuryor injury to others and
even death.
Isolating the generator:
a) Switch o the unit.
b) Unplug the unit from the mains supply and remove the power cord from the rear
of the unit.
c) Open all gas outlet ports until gas ceases to escape.
d) Disconnect from the application.
WARNING

Page 6
Safe State After Repair
To guarantee the generator is in a safe state after a repair, please ensure the following
conditions are met;
• The electricity cable has been correctly refitted.
The mains cable should be plugged into the IEC power inlet located on the rear
panel of the generator. This unit is classified as SAFETY CLASS 1. THIS UNIT MUST
BE EARTHED.
• The system builds pressure correctly.
With the outlet ports closed, pressure will start to build in the internal storage tanks.
In normal operation, both compressors will cycle alternately. Please refer to the flow
chart section of this manual for more detail.

Page 7
Technical Specification
MS Bench G SCI 1
Environment
MS Bench G SCI 1
Minimum Operating Ambient Temperature 5°C (41°F)
Maximum Operating Ambient Temperature 30°C (86°F)
Maximum Altitude 3000 m
Maximum Relative Humidity 80% Non-Condensing
Minimum Storage Temperature* -20°C (-4°F)
Maximum Storage Temperature* 60°C (140°F)
*NOTE – When taken out of storage the Generator should be allowed to acclimatize at room temperature for a mini-
mum of 3 hours before operation.
Generator Outlets
Curtain Maximum Flow^ 19 L/min @ 4.48 bar (0.670 cfm @ 65 psi)
Source Maximum Flow^ 26 L/min @ 6.89 bar (0.918 cfm @ 100 psi)
Exhaust Maximum Flow^ 25 L/min @ 4.13 bar (0.882 cfm @ 60 psi)
Particles <0.01µm
Phthalates NONE
Suspended Liquids NONE
Gas Outlets 3 x ¼” BSPP
Drain Outlet 1 x ¼” BSPP
^NOTE – These performance characteristics are valid only when paired with an approved Sciex application. Please refer
to current application matrix for a list of supported products.
Electrical Requirements
Voltage 220 - 240v ±10%
Frequency 50/60 Hz
Current 6 Amps
Input Connection C20 Plug
Power Cord C19 socket to local connection (10A minimum)
Pollution Degree 2
Installation / Over Voltage Category II
General
Dimensions cm (inches) WxDxH 91.4 x 78.7 x 76.2 (36 x 31 x 30)
Generator Weight Kg (lbs) 160 (352)
Shipping Weight Kg (lbs) 175 (385)

Page 8
Principle of Operation
On Demand Gas
When the application requires a gas flow, the generator produces gas on demand.
The generator will continue to supply the gas demand, whilst the application is in a
'Standby' mode the generator will still produce a low flow of gas. As soon as a demand
is detected from the application, the generator will again match the applications
requirements.
System Description
The generator consists of two compressors; the combined compressed air output
provides the requirements for both nitrogen and air demands; the compressed air is
stored in a reservoir prior to being divided to produce the nitrogen and air gases.
To produce nitrogen (CURTAIN) gas, a division of air is passed through the membrane
(see below for membrane process). The nitrogen is then stored in a dedicated reservoir
until needed. The air division is split once more between the desired outputs - ‘SOURCE’
and ‘EXHAUST’. Finally, all output product is passed through an RAC filter prior to
delivery to the application.
Once the designated upper reservoir setting has been achieved, the compressors will
switch OFF until the lower pressure setting is reached. At this point the compressors will
switch back ON and begin the cycle once again; this is referred to as the ‘Pressure Cycle’.
The generator output flow is completely controlled by the demand of the customer’s
application; the generator will produce up-to the maximum stated and will not exceed
this.
The membranes utilize separation technology to create Nitrogen. The membrane consists
of a bundle of hollow fibers, when compressed air is passed through the fibers the
oxygen in the air permeates through the walls of the fiber giving a high purity Nitrogen
output. The air drier membrane works in a similar manner, where the moisture in the air
permeates through the wall of the fibre to give a Dry Air output.

Page 9
Service Requirements
Service Schedule
Purchase Interval Component Visit
12 Months MS Bench G SCI 1 Annual Maintenance Kit* www.peakscientific.com/ordering
4 Years MS Bench G SCI 1 Year 4 Service Kit* www.peakscientific.com/ordering
* Please quote your generator serial number when ordering your Maintenance Kit to
ensure selection of the appropriate kit for your generator.
Note: Only Peak approved components should be used.
Page 9

Page 10
Product Overview
PCB
Membrane
RAC Filters
Twin Filters
Compressors
Valves
Power Inlet & Switch
Regulators
Dryer Filter
Capacitors
Valves
Reservoir Tanks
Air Inlet Filter
Electrical Panel
Outlet Panel
Curtain, Source & Exhaust
Pressure Gauges