Gow-Mac 75-800 User manual

Operating Manual
Model 75-800 & 75-800-AR
Noble Gas Purier
75-800: 120 V, 50/60 Hz
75-802: 230 V, 50/60 Hz
75-800-AR: 120 V, 50/60 Hz
75-802-AR: 230 V, 50/60 Hz
May 2019
Rev. 7
READ INSTRUCTIONS
BEFORE OPERATING
277 Brodhead Rd., Bethlehem, PA 18017-8600 U.S.A. Tel: [phone]

GOW-MAC Instrument Co.
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Model 75-800 & 75-800-AR Noble Gas Purier
Rev. 7 05/19
3
DO NOT EXPOSE PURIFIER CARTRIDGE TO AIR.
Exposure to air of the purifier cartridge packing MUST be avoided.
Even minimal exposure to air will render unacceptable analysis results
and degrade the packing. When not in use, CAP both the inlet and outlet fittings
(1/4” VCR) at the cabinet panel.
If minimal exposure to air at <150 °F (66 °C) has occurred, one may try to recondition
the purifier. Follow the instructions in this manual or contact GOW-MAC at
[phone] for assistance.
Models A󰀨ected
75-800
75-800-1
75-800-2
75-800-ADD
75-800-AR
75-800-EP
75-800-PRXR
75-800-R
75-802
75-802-AR
75-802-EP
75-802-KIT
!
IMPORTANT
NOTICE
!
IMPORTANT

GOW-MAC Instrument Co.
4

Model 75-800 & 75-800-AR Noble Gas Purier
Rev. 7 05/19
5
Noble Gas Purier
Models 75-800/75-802 & 75-800-AR/75-802-AR
1 Introduction
 TheGOW-MACModel75-800and75-800-ARNobleGasPuriersaredesignedto
 reducegasstreamimpuritiestotheppblevel,providingthesuperpuriedgases
your application requires.
1.1 Theory of Operation
The UltraPure™ purifying material is initially processed as particles of about
100 microns diameter, which are pressed to form pellets. This gives the advantage
 ofalargee󰀨ectivesurfaceareatoreactwiththeimpurities,whilemaintaininga
 lowpressuredropacrossthepurierbead.
 Thepuriermaterialhasbeencoatedwithathinoxidelayerduringthe
 manufacturingprocess.Whenthepurierisactivatedbyheatinginaninert
 atmosphereorundervacuum,thisoxidedi󰀨usesintothebulkofthegrainsThis
 leavesacleansurfacetoreactwiththeimpuritiesAsthegasstreamows
 throughthepurier,contaminantsarechemicallysorbedatthesurfaceofthe
 puriermaterial.Bymaintaininganoperatingtemperatureintherangeof
350 - 450 °C, the impurities that have formed compounds on the surface can
 continuouslydi󰀨useintothebulkofthematerial,therebymaintainingafresh,
reactive surface.
The above describes the reaction for all impurities except hydrogen. Hydrogen is
reversibly sorbed and has an equilibrium pressure dependent upon the
temperature of operation and the amount of hydrogen absorbed. If hydrogen
capacity is reached, (e.g., by a large amount of H2, H2O, or CH4), and it is
 importanttomaintainhydrogenlevelsintheppbrangeinthepuriedgas,then
 thehydrogencapacitycanberecoveredbyraisingthepuriertemperatureto
 450-500°Cforatleastonehour,therebydrivingo󰀨thepreviouslyabsorbed
hydrogen.
UltraPure™ is a registered trademark of UltraPure Systems Inc.

GOW-MAC Instrument Co.
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2 General Specications for Purier Material
 GasesPuried:     He,Ne,Ar,Kr,Xe
*Impurities Removed: H2O, H2, O2, N2, CO, CO2, CH4
Other Impurities Removed: NOx, NH3, CF3, CCl4, SiH4
Light Hydrocarbons
Impurities Not removed: He, Ne, Ar, Kr, Xe
Recommended Operating Temperature: 400 °C
Activation Time Required: 1 hour
Activation Temperature: 450 °C
*Total Outlet Level for Impurities Removed: <0.1 ppm
Maximum Recommended Operating Pressure: 80 atm (1175 psig)
**Suggested Maximum Flow Rates Model 75-800 75-800-1
0-500 mL/min. 2-10 mL/min.
Standard Fittings: 1/4" VCR
***Lifetime Using He/Ar: 1 yr. @ 200 ml/min (75-800)
1 yr. @ 5 ml/min. (75-800-1)
Maximum Power Requirements: 500 Watts, 115V
CAUTION
IN ORDER TO MAINTAIN PROPER PURIFICATION EFFICIENCY, DO NOT
EXCEED ESTIMATED LIFETIME BEFORE REPLACING PURIFIER CARTRIDGE.
IF HELP IS NEEDED IN DETERMINING END-OF-LIFE,
CONTACT GOW-MAC AT [phone].
* Each impurity removed to < 10 ppb based on 10 ppm total inlet impurities at suggested
  maximumowrate
 ** at1Atmoperatingpressure.Higherowratescanbeusedathigheroperatingtemperatures.
 *** Lifetimebasedonsuggestedmaximumowrates;ahigherowratewillproportionally
  decreasethelifetimewhilealowerowratewillincreasethelifetime.Thelifetimeisratesat
  10ppmtotalinletimpurities;higherorlowerinletimpuritylevelswilldecreaseorincreasethe
  lifetimeproportionally.Thepurierbedisconsideredanexpendableitem.Systemleaks,poorquality
  gas,andimproperhandlingwilladverselya󰀨ectitsusefullife.

Model 75-800 & 75-800-AR Noble Gas Purier
Rev. 7 05/19
7
3 General Specications for Temperature Controller
Part Number: 124-261
Control Mode: - Microprocessor-based
- Single input, dual output
- Ramp to set point: 0 to 550 °C
- Heat and cool auto-tune
Sensor Input Type: Platinum RTD, 100 ohms
Supply Voltage: 85 - 264 VAC, 50/60 Hz (75-800/802)
Ambient Temperature Range: Operating: -18 to 65 °C
Storage: - 40 to 85 °C
Mechanical Relay Life Span: 100,000 cycles
4 Purier Specications
Standard Fittings: 1/4" VCR
Weight (net): 25 lbs.
Dimensions: 11 3/4”D x 13”W x 15"H
5 Installation
A. Attach clean, 1/8" stainless steel tubing to a tank of Zero Grade Helium for Model
75-800 or Zero Grade Argon for Model 75-800-AR. Attach the other end of tubing
  to"INLET"onthebackofthePurier,usingtheprovidedVCRtting.
 B. Attachtheprovidedpieceofclean,1/8"stainlesssteelwithVCRttingson
  bothendsfromthebackofthePurier("OUTLET")to"CARRIERIN"
connection on the back of the GC or "ZERO GAS IN" for analyzers.
NOTE
TO PREVENT CONTAMINATION OF THE INSTRUMENTS BY GREASE, OIL
OR CHEMICAL RESIDUE, THIS NEXT PROCEDURE SHOULD BE FOLLOWED
FOR PURGING STAINLESS STEEL TUBING PRIOR TO CONNECTING IT TO THE
PURIFIER AND GC:
CLEAN TUBING BY FLUSHING WITH ACETONE TO REMOVE ANY OIL
RESIDUE THAT MAY BE PRESENT
(ACETONE IS PREFERRED FOR HEALTH REASONS).
AFTER WASHING, LET TUBING DRAIN AND DRY.

GOW-MAC Instrument Co.
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ALL LINES AND TUBING MUST BE CLEAN AND FREE FROM MOISTURE
BEFORE CONNECTING TO INSTRUMENTS.
6 Temperature Controller Controls
6.1 Keys and Displays
After one minute with no key activations, the control reverts to the process
value in the upper display and the set point in the lower display.
WATLOW
EZ-ZONE®
EZ
°F
°C
%
1
2
3
4
5
...
...
.
.
Z
O
N
E
Upper Display: In the Home
page, displays the process
value, otherwise displays the
value of the parameter in the
lower display.
Lower Display: Indicates
the set point or output power
value during operation, or
the parameter whose value
appears in the upper display.
EZ Key: Enables simple, one-
touchoperationofuserdened,
repetitive activities. This key
can be programmed to do
various tasks, such as locking
the keyboard, restoring user
settings, etc.
ZONE: Indicates the controller
zone (1-9).
Advance Key: Advances
through parameter prompts.
Up and Down Keys: In the Home
page, adjusts the set point in the
lower display. In other pages,
changes the upper display to a
higher or lower value, or changes a
parameter selection.
Output 1 Indicator Light: When lit
it indicates Output 1 is energized.
Temperature Units: Indicates
whether the temperature is displayed
in Fahrenheit or Celsius.
Output 2 Indicator Light: Lit when
Output 2 is active. This output can
beconguredasacontroloralarm
output.
% Percent Power Indicator
Light: Lights when the controller is
displaying values as a percentage
or when the open-loop set point is
displayed.
Innity Key: Press to back up
once level, or press and hold for
two seconds to return to the Home
page. From the Home page can
clear alarms and errors if clearable.

Model 75-800 & 75-800-AR Noble Gas Purier
Rev. 7 05/19
9
6.2 Responding to a Displayed Message/Error Code
An active message will cause the display to toggle between the normal
settings and the active message in the upper display and [Attn] in the lower
display.
Your response will depend on the message and the controller settings. Some
messages, such as Ramping and Tuning, indicate that a process is underway.
If the message was generated by a latched alarm or limit condition, the
message can be cleared when the condition no longer exists. If an alarm has
silencing enabled, it can be silenced.
Push the Advance Key to display [.9nr] in the upper display and the message
source (such as [L.hi]) in the lower display.
Use the Up and Down keys to scroll through possible responses, such as
Clear
[CLr] or Silence [S.L].ThenpushtheAdvanceorInnitykeytoexecutethe
action.
Er. 1 - Error Input 1: The sensor input generated a value lower than the
allowable signal range. Enter a valid input.
100 - Device Error: Controller displays internal malfunction message at
Power Up.
7 Set Point Settings
A. To set the set point: turn the unit “on” and then push the Up or Down arrow to
adjust to the desired operating temperature.
8 Settings
8.1 Initial Start-Up
   A. Thepuriershouldbepurgedwithaninertgas(minimumpurity99.99%)
before activating the material (He, Ne, Ar, Kr, Xe).
   B. Startaowthroughtheunitforatleast10minutes.Useaminimumof
10%-20%ofspeciedowratefortheunit.Useacontinuouspurgeow
during activation.
CAUTION
THE PURIFIER MATERIAL SHOULD NEVER BE
HEATED ABOVE 150°C IN AIR.

GOW-MAC Instrument Co.
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  C. Atthispoint,turntheNobelGasPurier"ON"andsettheoperating
temperature to 450 °C as follows:
i. Press either UP-Arrow or DOWN -Arrow key until the desired temperature
(450 °C) is displayed on the upper display. A few seconds after the
temperature is set, the controller will start to adjust the temperature
automatically.
ii. Once the temperature is reached, it should be maintained for a minimum
of 2 hours to properly condition the unit. This operational step is referred
to at "activation".
iii. Set the TEMPERATURE CONTROLLER to the normal operating
temperature: 400 °C. Higher or lower temperatures can be used
depending upon operating conditions.
In general, higher temperatures reduce outlet impurity levels for all gases
except hydrogen. Higher temperatures are recommended in case of high
inletimpuritylevelsand/orhighowrates.
   iv. Thegastobepuriedcannowbeallowedtoowthroughtheunitatthe
desiredowrate.
CAUTION
IF THE GAS LINE IS ACCIDENTLY VENTED TO AIR, THE POWER SHOULD
IMMEDIATELY BE TURNED OFF, OTHERWISE THE PURIFIER MATERIAL
IN THE UNIT MAY BE DESTROYED IF THE PURIFIER MATERIAL IS
MAINTAINED AT TEMPERATURES ABOVE 150 °C.
v. If the system is vented to the atmosphere, the unit should be at room
temperature before venting.
vi. Once the unit has been exposed to the atmosphere, Steps A - E should be
repeated.
WARNING
THIS UNIT IS INTENDED FOR THE PURIFICATION OF INERT GASES.
UNDER NO CIRCUMSTANCES SHOULD THIS UNIT BE USED
FOR THE PURIFICATION OF OXYGEN, HYDROGEN, AIR
OR OTHER REACTIVE GASES.