Alpha Moisture Systems PSS User manual

PSS - Portable Sample System - User Manual
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Alpha Moisture Systems
PSS - Portable Sample System
2529 - PSS User Manual
Issue 5.

PSS - Portable Sample System - User Manual
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Contact Information
Head Office
Alpha Moisture Systems
Alpha House
96 City Road
Bradford
West Yorkshire
BD8 8ES
United Kingdom
Tel: [phone]
Fax: [phone]
Email: [e-mail]
Websites: www.amsystems.co.uk
www.dew-point.com
www.sadpmini2.com
Office Opening Hours: GMT (London Time)
Monday - Thursday 8.30am - 5.30pm
Friday 8.30am - 5.00pm
Saturday and Sunday - Closed
Authorised Distributor Contact Information
© Alpha Moisture Systems 2020 - 2529 PSS User Manual –Issue 5 - 09/01/2020
CERTIFICATE No. FM35600
BS EN ISO 9001:2015

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Warranty
Alpha Moisture Systems Ltd. (AMS) warrants the products it manufactures, or distributes, to
be free of defects in material and workmanship under normal use and service when operated
within the specified design limitations for a period of 24 months from date of initial shipment.
Under this Warranty, AMS will, at its discretion, repair or replace any component that upon
examination by AMS or its duly authorized representatives proves to be defective during the
warranty period, provided the system is returned to the factory for inspection and repair
shipping prepaid.
Improper or unauthorized maintenance, storage, repair, or alteration of any kind by personnel
other than AMS, or its duly authorized representatives, may void all warranties. Warranty may
also be voided for misuse, neglect, accident, corrosion, and improper installation.
This Warranty is exclusive and in lieu of any and all other warranties of merchantability, fitness
for a particular purpose, or any other warranty, expressed or implied, and all other liabilities
and obligations on the part of AMS. AMS will not be liable for any other claims or damages,
either direct, indirect, or consequential arising out of the use of its products.
Original manuals are prepared in English. Translations in other languages may be available, but
in the event of any discrepancy, the English version will be considered as the official version,
which is subject to change without notice.
NOTE: The sensor should not be exposed to ammonia (NH3), mercury (Hg), carbon monoxide
(CO) or acid gases, such as chlorine (Cl) and hydrogen chloride (HCl), as they chemically attack
the sensor and destroy it. Strong oxidising agents, such as ozone (O3) should also be prevented
from coming into contact with the sensor.
For more information please contact us below.
Alpha Moisture Systems Ltd.
Alpha House, 96 City Road
Bradford, BD8 8ES
England, UK
Phone: [phone]
Fax: [phone]
Email: [email protected]
Websites: www.amsystems.co.uk | www.dew-point.com | www.sadpmini2.com

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1 Introduction 6
1.1 Explanation of Prohibition, Warning and Note Symbols used 6
1.2 Warranty 6
1.3 Instrument Description 7
1.4 General Arrangement 7
1.5 Dimensions 7
2 Quick Start Guide 8-10
3 PURGING the instrument before taking a sample 10-13
4 DISCONNECTION - FOLLOW THIS PROCEDURE EXACTLY 14
5 Filter Replacement (If Fitted) 15
6 Sampling very dry gasses and/or at very low pressure 15
7 Cleaning the PSS 16
8 Gases to avoid 16
9 Specifications 16-17

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NOTE
1 Introduction
This User Manual is only for use with the instrument supplied. All information required
for the safe and proper operational use of the instrument is contained here. Make sure
you read and understand the information and instructions in this User Manual before
using the instrument. Failure to operate the instrument as directed in this User Manual
may:
•Expose personnel to risk of injury
•Cause damage to and/or impair the function of the instrument
•Invalidate the instrument warranty
1.1 Explanation of Prohibition, Warning and Note Symbols used
Local health and safety regulations should be observed as should the safety critical
prohibitions, warnings and notes highlighted in this user manual.
DO NOT
Prohibited actions or behaviours
WARNING
Danger to personnel and / or damage to equipment
Additional information
1.2 Warranty
The PSS is supplied with a two-year warranty from the date of purchase.
This warranty is subject to the proper operational use of the instrument and
following the information provided in this User Manual. The instrument should
not be repaired without prior inspection or authorisation by Alpha Moisture
Systems or an authorised distributor. Any unauthorised alteration or misuse
may invalidate the instrument warranty.
Please retain the original equipment packaging so the PSS
can be returned to Alpha Moisture Systems or your
authorised distributor if required.
NOTE

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1.3 Instrument Description
The PSS Portable Sample System has been specifically designed to condition
pressurised gas samples (>2900 psi max / 200 barg.
See specifications for details) for use with SADPmini2, SADPmini2-Ex, SADPmini
and SADPmini-Ex dewpoint meters.
Although the PSS chassis is constructed from high quality 304 stainless steel,
care should be taken when it is in transit and appropriate packaging used.
Do not drop or shock the instrument, especially when a dewpoint meter is
installed to the PSS as damage to both units could occur.
1.4 General Arrangement
Fig 1. PSS-R-F-Q shown here for illustration purposes.
Double Toggle Zipper
Pocket for Sample Tube
Rugged Foam Padded
Carry Case
Optional Particle Filter
Regulator or Needle Valve
Choice of INLET Connections
Adjustable Secure Flap
Latch
Pocket for User Manual
Compatible with SADPmini2,
SADPmini2-Ex, SADPmini and
SADPmini-Ex Dewpoint Meters
Instrument Attachment Fittings
VENT tube, at rear of
Flow Indicator
Integrated Flow Indicator
Hand and Adjustable Shoulder
Straps
Powder Coated Stainless Steel
Chassis
1.5 Dimentions
Height
270mm (10.63”)
Width
315mm (12.41”)
Depth
245mm (9.65”)

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2Quick Start Guide
Below is a general guide to get started, but first, ensure that the PSS is located
on a flat, level, dry and non-slip safe surface, close to the sample point (gas
source).
For faster results we recommend the sampling line to be as short as possible to
reduce purging time. Please read this section carefully and understand it.
2.1 Connect the SADPmini2 or SADPmini dewpoint meter to the PSS using the
appropriate connecting tubes supplied, and ensure a gas tight seal on both
sides of the instrument. Fig 2.
The user will need a 9/16” (or 14mm) open ended wrench size and a 5/8” (or
16mm) holding wrench to prevent rotation of the bulkhead fittings.
Fig 2.
Installing the SADPmini2 into the PSS
Fig 3.
Ensure the SADPmini2 head is down fully
The Head of the SADPmini2 must be in the down closed position at this stage. Fig 3.
2.2 Ensure that (if fitted) the Pressure Regulator Valve is turned fully anti-clockwise and is
fully closed. Fig 4. On next page.
If a Needle Valve is fitted, then ensure that this is fully closed by turning fully clockwise.
Fig 5. On next page.

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2.2 Continued.
2.3 Before connecting a sample line to the Isolation valve at the gas source, first check that
the gas to be sampled is free from excessive moisture and/or particle contaminants by
placing a white filter paper (or similar) approximately 1 cm from the outlet and very
slowly and carefully opening the Isolation Valve to achieve a steady flow of gas/air onto
the white filter paper for approximately 1 minute. See Fig 6.
Fig 4.
Pressure Regulator fully closed
anti-clockwise
Fig 5.
Needle Valve fully closed clockwise
Fig 6.
Isolation Valve Test
Sample Point Isolation Valves, as
pictured in Fig 7. are not supplied with
the PSS - Please contact your local
distributor on how to order.
NOTE
If contaminants are seen on the white filter paper, a filter unit must be installed at the
Isolation Valve outlet and before the sample hose.
When the filter unit is fitted, repeat the above procedure with the white filter cloth.
For Technical Help Contact Alpha Moisture Systems.

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2.4 If no contaminants are seen on the white filter paper, close the isolation valve and
connect the sample line to the Isolation Valve and ensure a gas tight seal. Fig. 7.
Fig 7.
Isolation Valve fully closed and
connected to Sample Line
2.5Connect the other end to the PSS (depending on the type of fitting used) and ensure a
gas tight seal. Fig. 8 and 9.
Fig 8.
Sample Line to Inlet Connection
Fig 9.
Quick connect shown
3. PURGING the instrument before taking a sample:
Ensure all pipework is connected and leak tight. The head is down on the SADPmini2.
Very slowly and carefully open the Isolation Valve at the gas source.
See Fig 10 on next page.
CLICK

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3. Continued.
Fig 10.
Partly open the Isolation Valve
3.1 Carefully open the Pressure Regulator Valve by turning clockwise
Fig 11 until a flow of 8 to 9 litres per minute can be seen on the flow indicator. Fig 12.
Fig 11.
Open Pressure Regulator Slowly
Clockwise
Fig 12.
Flow Indicator showing 8-9
Litres/Minute flow rate
Fig 13.
Open Needle Valve Slowly
Anti-Clockwise
or, if a needle valve is fitted, carefully open by turning this anti-clockwise. Fig 13.
until a flow of 8 to 9 litres per minute can be seen on the flow indicator. Fig 12.

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3.2 Now turn on the SADPmini2 (/Ex). Fig 14. and ensure that the display indicates that the
measuring sensor is dry. (Typically < -70°C dewpoint).
If not, refer to the instrument user manual.
Fig 14.
Press ON for 2 seconds
Fig 15.
Fig 16.
3.3 After purging for a minimum of 2 minutes, place a finger over the VENT on the Flow
Indicator until the desiccant head on the instrument is fully raised as shown in
Fig 15.
Place finger over VENT tube
to raise the desiccant head and expose
the sensor to the gas

Do Not Pull Head Up

Pulling up the head will draw moisture from ambient air in the
work place into the head chamber where the sensor is exposed,
this will result in a contaminated sample and give
a false measurement. Fig 16.
The sample flow must always flow in one direction from the gas
source and pass the sensor in the head for an accurate result.
WARNING


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3.4 When the desiccant head is fully extended and the sensor exposed to the sample gas,
the displayed moisture reading should rise to that of the sample gas.
Take a reading when the dewpoint value on the screen has settled and is stable. Fig 17.
Fig 17.
Take reading when settled
3.5 After a reading has been taken and sampling is complete, push the desiccant head
down slowly and carefully to isolate the sensor Fig 18 and turn off the instrument.
Fig 19.
Fig 18.
Push Head Down Slowly
Fig 19.
Press Home Key for 2 Seconds
to turn off instrument

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4. DISCONNECTION - FOLLOW THIS PROCEDURE EXACTLY
Do not disconnect any connections whilst the Isolation Valve at
the gas/air source is still open. Doing so could cause serious
injury to the operator and persons near by.
DO NOT
Do not turn off the Pressure Regulator or Needle Valve at this
stage.
Doing so will retain pressure in the sample line.
DO NOT
4.1 First, TURN OFF the Isolation Valve fully and allow the system to fully
de-pressurise. Fig 20.
Fig 20.
Fully Closed –SHUT OFF
Fig 21.
BALL - ZERO FLOW
4.2 When the BALL in the flow indicator has fallen to “0” (ZERO litres per minute) as
shown in Fig 21 above, it is now safe to disconnect the sample line from the PSS and
the Isolation Valve.
4.3 Turn OFF the Pressure Regulator or Needle Valve.
See section 2.2 on Page 8-9, Fig 4 and Fig 5.

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5Filter Replacement (If fitted)
Before disassembling the filter unit (if fitted), the user must
follow the de-pressurisation procedure.
See section 4 on page 14.
WARNING
5.1 Using a 3/4 (19mm) wrench, carefully untighten the filter housing anti-clockwise
Fig 22 to gain access to the filter cartridge. Unscrew the filter cartridge retaining
cap and replace the filter as necessary.
Re-assembly is the reverse of the dis-assembly procedure. Tighten lightly only.
Fig 22.
Unscrew anti-clockwise
6Sampling very dry gasses and/or at very low pressure
For very dry gases and/or very low pressure, use the “Pig-Tail” VENT tube to stop
back diffusion and contaminating the sample head/sensor. Fig 23. Part No. PPE417.
Fig 23.
‘Pig-Tail’Optional Extra
VENT tube

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7Cleaning the PSS
The PSS instrument must only be cleaned with a soft cloth dampened with mild
soapy water only.
Do not use solvents, silicones or abrasives to clean the system.
DO NOT
8Gases to Avoid
Most gases can be moisture tested with no calibration necessary between
sampling different gases. However, due to their corrosive or other properties not
all gases are compatible with this instrument. The table below details the gases
that should be avoided. If in doubt contact your authorised distributor.
Ammonia (NH3) Not Permitted
Mercury (Hg) Not Permitted
Ozone (O3) Not Permitted
Chlorine (Cl2) Not Permitted
Hydrogn Chloride (HCI) Not Permitted
Sulphur Dioxide (SO2) Permitted when moisture content is
less than 100ppm(v)
Gas and Chemical Symbol Sample Suitability
9Specifications
Chassis:
Powder coated 304 stainless steel
Internal Pipework:
316 stainless steel
Internal Fittings:
316 stainless steel
Quick Connection (inlet) Swagelok®:
maximum connected pressure 2900PSI (200barg)
maximum un-connected (uncoupled) pressure 250PSI (17barg)
Flow Indicator:
0 - 20 litres
Carrying Bag:
Antistatic PVC foam faux leather with rubber feet.
Filter Unit (when fitted):
High grade stainless steel with removeable housing for access to

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Carrying Bag:
Antistatic PVC foam faux leather with rubber feet.
Filter Unit (when fitted):
High grade stainless steel with removeable housing for access to
replaceable filter cartridges.
Pressure Regulator (where applicable):
High grade stainless steel. Pressure range 0-3045PSI (210barg).
Needle Valve (where applicable):
316 High grade stainless steel. Pressure range 0 -4989PSI (344barg).
9Specifications continued