Owlstone 90-0322 Series User manual

90-0322-AAA OHG Sub-Unit Installation Instructions 20th Nov 2012
© 2012 Owlstone Ltd Proprietary and Confidential Page 1 of 14
90-0322-AAA OHG Sub-Unit Installation Instructions
Issue/Version
Date
Author
Details
AAA
20/11/2012
Graham Newell
Original
Overview
This document describes how to install additional OHG sub-units into an existing GEN-SYS system.
Table of contents
Section 1 - Note on safety.......................................................................................................................... 2
Section 2 - Materials and tools................................................................................................................... 2
Section 3 - Overview of procedure............................................................................................................. 3
Section 4 - Disconnect power + air from the GEN-SYS rack..................................................................... 4
Section 5 -Removing an OVG-4 sub-unit (optional step).......................................................................... 5
Section 6 - Installing a Quick Connect in GEN-SYS.................................................................................. 8
Section 7 - Preparing the RS-485 cable .................................................................................................... 9
Section 8 - Installing the OHG ................................................................................................................. 10
Section 9 - Fit the water bottle bracket assembly.................................................................................... 12
Section 10 - Connecting the water bottle ................................................................................................... 13
Section 11 - Connecting the hygrometer.................................................................................................... 14

90-0322-AAA OHG Sub-Unit Installation Instructions 20th Nov 2012
© 2012 Owlstone Ltd Proprietary and Confidential Page 2 of 14
Section 1 - Note on safety
Customers are expected to make their own assessment of COSHH / chemical safety
before following this procedure. Customers should also consider undertaking a risk
assessment before attempting procedures described in this document.
Always physically disconnect Inlet Air, and power from the rear of the GEN-SYS rack
before following this procedure (section 3 of this guide explains how to do this).
Always ensure sub-units are switched off before removing them from the GEN-SYS rack.
Section 2 - Materials and tools
If a customer purchases an OHG they are supplied with the following items..
00-0006 1 Owlstone Humidity Generator (OHG)
50-0081 1 Quick connect body, Swagelok 1/8”
01-0228 1 Bracket assembly (for holding bottle)
51-0020 6 M3 x 6mm, screws to connect bottle bracket to GEN-SYS rack
01-0160 1 Bottle cap and 2micron diffuser assembly
50-0158 1 Bottle, 500ml, pressure rated
----------- 2 Pipe assemblies to connect bottle to OHG
50-0258 2 1/8” Swagelok Nut
50-0282 2 1/8” Swagelok Ferrule
50-0543 1 Dew-Point Hygrometer
----------- 1 Pipe assembly to connect output of OHG to Easidew Hygrometer
90-0027 1 Decontamination certificate
---------- 1 Michell Instruments User Guide
Tools required:
1 x 5/8“ spanner
2 x 7/16” spanner
Philips screwdriver, No. 1
A pair of side cutters

90-0322-AAA OHG Sub-Unit Installation Instructions 20th Nov 2012
© 2012 Owlstone Ltd Proprietary and Confidential Page 3 of 14
Section 3 - Overview of procedure
Disconnect power, air and RS-485 cabling from the GEN-SYS rack, see section 4
Remove roof panel from rack, see section 5
Because of the external water bottle the OHG must be mounted in the right-hand position as
shown below. If you need to remove an OVG already mounted in this position see section 5
Figure-1: OHG position
Fit the Quick Connect supplied with the OHG, see section 6
Prepare the RS-485 cable, see section 7
Install the OHG, see section 8
Fit the water bottle holder, see section 9
Connecting the water bottle, section 10
Connecting the hygrometer, section 11
The OHG must be located
in the right-hand position

90-0322-AAA OHG Sub-Unit Installation Instructions 20th Nov 2012
© 2012 Owlstone Ltd Proprietary and Confidential Page 4 of 14
Section 4 - Disconnect power + air from the GEN-SYS rack
This section describes how to disconnect the GEN-SYS rack from air, exhaust and power services.
Warning: Inlet gas line pressure must be vented before following this procedure.
1) Vent the gas supply line that provides pressure to the GEN-SYS system. Do not proceed unless
pressure has been vented from this line.
2) Using a 9/16” spanner disconnect the inlet gas line from the rear of the GEN-SYS system.
3) If in use, using a 9/16” spanner disconnect the exhaust line from the rear of the GEN-SYS system
4) The DC power connection is unscrewed by hand.
Figure 2: Rear panel of GEN-SYS rack
Disconnect Air Supply
Disconnect Exhaust
Disconnect DC Power

90-0322-AAA OHG Sub-Unit Installation Instructions 20th Nov 2012
© 2012 Owlstone Ltd Proprietary and Confidential Page 5 of 14
Section 5 - Removing an OVG-4 sub-unit (optional step)
To improve access it is often more convenient to remove any pre-existing OVG-4 sub-units from the GEN-
SYS rack. This is not essential and may impact the users COSHH evaluation.
Warning: The user is responsible for considering all chemical safety implications / COSHH
before following this procedure.
Always disconnect DC power, exhaust and gas supply from the rear of the GEN-SYS rack
before following this procedure.
Always consider chemical safety before following this procedure.
1) Switch off power to the unit
Figure 3: OVG-4 front panel
2) Allow the OVG-4 to cool down to room temperature
3) Unscrew and remove the 4x screws from the front panel of the OVG-4 as shown below
Figure 4: photograph showing the 4x screws used to mount the OVG-4
Switch off power to
the unit here

90-0322-AAA OHG Sub-Unit Installation Instructions 20th Nov 2012
© 2012 Owlstone Ltd Proprietary and Confidential Page 6 of 14
4) Remove the ‘roof’ panel from the rack
Unscrew the 4x screws shown below. The roof panel can then be lifted off.
Figure 5: removing the roof panel
5) Disconnect DC power and gas supply
Both DC power and gas supply fittings are removed by hand from the rear of the OVG-4.
The DC power connector is removed by pulling gently. The gas supply QC is removed by sliding the
tapered end of the quick-connect towards the rear of the OVG-4
Figure 6: Disconnect DC power cable Figure 7: Disconnect gas line ‘quick-connect’

90-0322-AAA OHG Sub-Unit Installation Instructions 20th Nov 2012
© 2012 Owlstone Ltd Proprietary and Confidential Page 7 of 14
6) Disconnect the exhaust line
Using a 7/16” spanner unscrew the 1/8” Swagelok fitting on the rear of the OVG-4.
Figure 8: Disconnecting the exhaust
7) Carefully remove the OVG-4 from the rack
Use both hands to carefully slide the OVG-4 out of the GEN-SYS rack.
Figure 9: Removing an OVG-4 from the GEN-SYS rack

90-0322-AAA OHG Sub-Unit Installation Instructions 20th Nov 2012
© 2012 Owlstone Ltd Proprietary and Confidential Page 8 of 14
Section 6 - Installing a Quick Connect in GEN-SYS
Warning: Swagelok fittings will leak if fitted incorrectly. Owlstone will not take any
responsibility for incorrect fitting of Swagelok fittings by the end user.
The user must undertake a risk assessment before following this procedure. The user is
responsible for assessing chemical safety, COSHH and other risk implications.
If the user requires the GEN-SYS system to be leak tight it must be tested after assembly.
Please contact Owlstone for technical support regarding leak testing.
1) Prepare materials
A Swagelok Quick Connect is supplied with your OHG (Owlstone p/n 50-0081).
Two 7/16” and a 5/8” spanner are required for this procedure.
Figure 10: Quick connect
2) Remove Swagelok cap, fit Quick Connect
Remove the Swagelok cap using the two 7/16” spanners before installing the quick connect. Swagelok
fittings must be tightened by hand before turning an additional 1x half turn using a 7/16” spanner.
Do not over-tighten.
Figure 11: Remove the cap Figure 12: Install the quick connect

90-0322-AAA OHG Sub-Unit Installation Instructions 20th Nov 2012
© 2012 Owlstone Ltd Proprietary and Confidential Page 9 of 14
Section 7 - Preparing the RS-485 cable
If the user needs RS-485 communication capability then cabling needs to be prepared as shown below
Firstly, un-wrap & un-strap the spare cables.
Next remove the “bridge” or “plug” to leave the 15-way connector ready to connect to the OHG.
Figure 13: RS-485 cables as supplied Figure 14: Remove “bridge” or “plug”
Figure 15: Cable ready to connect to the OHG

90-0322-AAA OHG Sub-Unit Installation Instructions 20th Nov 2012
© 2012 Owlstone Ltd Proprietary and Confidential Page 10 of 14
Section 8 - Installing the OHG
Installing the OVG-4 sub-unit follows the procedure described in section 4 in reverse.
1) Mount the OVG-4 sub-unit in the GEN-SYS rack
Figure 16: Mounting an OVG-4 sub-unit
2) Connect quick connect to the rear of the OVG-4 as shown below.
Pushing the valve firmly until a click is heard.
Figure 17: Connect Quick Connect Valve