Agilent Technologies TriScroll 300 User manual

INSTALLATION AND
OPERATION MANUAL
Vacuum Products Division
TriScroll
TM
300
Inverter
Dry Scroll
Vacuum Pump
Manual No. 699904355
Revision C
October 2009

Copyright 2009
Agilent, Inc.
TriScroll
™
300 Inverter
Dry Scroll Vacuum Pump
TriScroll is a trademark of Agilent, Inc.

iii
TriScroll 300 Inverter Vacuum Pump
Table of Contents
Declaration of Conformity
Warranty ...................................................................viii
Warranty Replacement and Adjustment..............viii
Instructions for Use ..................................................... 1
General Information ................................................. 1
Storage ................................................................. 1
Unpacking and Inspection........................................ 1
Installation Requirements ......................................... 2
Safety ................................................................... 2
Operation................................................................. 4
Startup Procedure ................................................. 4
Shutdown Procedure ............................................ 4
Maintenance ............................................................ 4
Technical Information ................................................. 5
Pump Electrical Controller........................................ 8
Technical Specifications....................................... 9
Serial Interface Specification RS485 and RS232.. 10
Gas Ballast ............................................................. 12
Bearing Purge......................................................... 12
Purge Kit ................................................................ 12
Isolation Valve Kit .................................................. 12
CT-100 Speed Control Kit....................................... 14
VPI and CT100 Speed Control Kit........................... 15
Exhaust Silencer Kit ................................................ 16
Vibration Isolation Kit............................................. 16
HEPA Inlet filter...................................................... 16
Troubleshooting ..................................................... 17
Maintenance .......................................................... 18
General Information ........................................... 18
Related TriScroll Manuals................................... 18
Maintenance and Tooling Kits ............................ 19
Factory Service Options...................................... 20
Accessories......................................................... 20
Contacting Agilent.............................................. 20

TriScroll 300 Inverter Vacuum Pump
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v
TriScroll 300 Inverter Vacuum Pump
List of Figures
Figure Caption Page
1 Interface Drawing with Dimensions . . . . . . . 6
2 Pumping Speed Curves . . . . . . . . . . . . . . . . . 6
3 TriScroll 300 Inverter Vacuum Pump . . . . . . . 7
4 Inverter Interface . . . . . . . . . . . . . . . . . . . . . . 7
5 Driving Frequency vs. Analog Input . . . . . . . . 9
6 T+ Pumps List . . . . . . . . . . . . . . . . . . . . . . . 11
7 T-Unknown Pump . . . . . . . . . . . . . . . . . . . . 12
8 Isolation Valve Position . . . . . . . . . . . . . . . . 13
9 Pumping Speed Percentage Drop . . . . . . . . . 14
10 VPI and CT100 Kit . . . . . . . . . . . . . . . . . . . 15
11 Serial Number Location . . . . . . . . . . . . . . . 15
List of Tables
Table Title Page
1 Power Cord Selection .................................... 3
2 Circuit Breaker Requirements......................... 3
3 Specifications ................................................ 5
4 P1 Interlock ................................................... 8
5 J2-Serial Port.................................................. 8
6 T-Plus Software Variables .............................. 8
7 Status LEDs .................................................... 9
8 Troubleshooting Chart ................................. 11
9 Other Related Manuals ................................ 12
10 Maintenance and Tooling Kits ..................... 13
11 Factory Service Options............................... 14
12 Accessories .................................................. 14

TriScroll 300 Inverter Vacuum Pump
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declare under our sole responsibility that the product,
erklären, in alleniniger Verantwortung, daß dieses Produkt,
déclarons sous notre seule responsabilité que le produit,
declaramos, bajo nuestra sola responsabilidad, que el producto,
verklaren onder onze verantwoordelijkheid, dat het product,
dichiariamo sotto nostra unica responsabilità, che il prodotto,
Declaration of Conformity
Konformitätserklärung
Déclaration de Conformité
Declaración de Conformidad
Verklaring de Overeenstemming
Dichiarazione di Conformità
to which this declaration relates is in conformity with the following standard(s) or other normative documents.
auf das sich diese Erklärung bezieht, mit der/den flogenden Norm(en) oder Richtlinie(n) übereinstimmt.
auquel se réfère cette déclaration est conforme à la (auz) norme(s) ou au(x) document(s) normatif(s).
al que se refiere esta declaración es conforme a la(s) norma(s) u otro(s) documento(s) normativo(s).
waamaar deze verklaring verwijst, aan de volende norm(en) of richtlijn(en) beantwoodt.
a cui se rifersce questa dichiarazione è conforme alla/e sequente/I norma/o documento/I normativo/i.
We
Wir
Nous
Nosotros
Wij
Noi
Agilent, Inc.
John Ehmam
Operations Manager
March 2003
121 Hartwell Avenue
Lexington, MA, 02421-3133 USA
Agilent, Inc.
Vacuum Products Division
Lexington, Massachusetts, USA
TriScroll Inverter Vacuum Pumps (PTS03001INV, PSS06001INV)
98/37/EEC, Machinery Directive
EN 1012-2:1996 Compressors and vacuum pumps safety reqmts; Part 2 vacuum pumps
EN 1050:1996 Safety of machinery - principles for risk assessment
EN 60204-1 Electrical equipment of industrial machines; general requirements
73/023/EEC, Low Voltage Directive
EN 60034 part 1 Rotating electrical machines - Part 1: Rating and performance
EN 61010-1:2001 Safety requirements for electrical equipment for measurement, control and
laboratory use
89/336/EEC, Electromagnetic Compatibility Directive
EN 61000-4-2 Testing and measurement techniques - Electrostatic discharge immunity test
EN 61326:1997/A3:2003 Electrical equipment for measurement, control and laboratory use
Declaration of Conformity

TriScroll 300 Inverter Vacuum Pump
viii
Warranty
Products manufactured by Seller are warranted against
defects in materials and workmanship for twelve (12)
months from date of shipment thereof to Customer, and
Seller’s liability under valid warranty claims is limited, at
the option of Seller, to repair, to replace, or refund of an
equitable portion of the purchase price of the Product.
Items expendable in normal use are not covered by this
warranty. All warranty replacement or repair of parts shall
be limited to equipment malfunctions which, in the sole
opinion of Seller, are due or traceable to defects in
original materials or workmanship. All obligations of
Seller under this warranty shall cease in the event of
abuse, accident, alteration, misuse, or neglect of the
equipment. In-warranty repaired or replaced parts are
warranted only for the remaining unexpired portion of the
original warranty period applicable to the repaired or
replaced parts. After expiration of the applicable warranty
period, Customer shall be charged at the then current
prices for parts, labor, and transportation.
Reasonable care must be used to avoid hazards. Seller
expressly disclaims responsibility for loss or damage
caused by use of its Products other than in accordance
with proper operating procedures.
Except as stated herein, Seller makes no warranty, express
or implied (either in fact or by operation of law), statutory
or otherwise; and, except as stated herein, Seller shall
have no liability under any warranty, express or implied
(either in fact or by operation of law), statutory or
otherwise. Statements made by any person, including
representatives of Seller, which are inconsistent or in
conflict with the terms of this warranty shall not be
binding upon Seller unless reduced to writing and
approved by an officer of Seller.
Warranty Replacement and Adjustment
All claims under warranty must be made promptly after
occurrence of circumstances giving rise thereto, and must
be received within the applicable warranty period by
Seller or its authorized representative. Such claims should
include the Product serial number, the date of shipment,
and a full description of the circumstances giving rise to
the claim. Before any Products are returned for repair
and/or adjustment, written authorization from Seller or its
authorized representative for the return and instructions
as to how and where these Products should be returned
must be obtained. Any Product returned to Seller for
examination shall be prepaid via the means of
transportation indicated as acceptable by Seller. Seller
reserves the right to reject any warranty claim not
promptly reported and any warranty claim on any item
that has been altered or has been returned by
non-acceptable means of transportation. When any
Product is returned for examination and inspection, or for
any other reason, Customer shall be responsible for all
damage resulting from improper packing or handling, and
for loss in transit, notwithstanding any defect or
non-conformity in the Product. In all cases, Seller has the
sole responsibility for determining the cause and nature of
failure, and Seller’s determination with regard thereto
shall be final.
If it is found that Seller’s Product has been returned
without cause and is still serviceable, Customer will be
notified and the Product returned at its expense; in
addition, a charge for testing and examination may be
made on Products so returned.
3/1/00

1
TriScroll 300 Inverter Vacuum Pump
DRAFT 6/5/11
Instructions for Use
General Information
This equipment is designed for use by professionals. The
user should read this instruction manual and any other
additional information supplied by Agilent before
operating the equipment. Agilent will not be held
responsible for any events that occur due to
non-compliance with these instructions, improper use by
untrained persons, non-authorized interference with the
equipment, or any action contrary to that provided for by
specific national standards.
The TriScroll™ 300 is a dry, scroll vacuum pump. This
pump is suitable for pumping air or inert gases. The pump
is not intended to pump toxic, corrosive, explosive, or
particulate-forming gases.
The following paragraphs contain all the information
necessary to guarantee the safety of the operator when
using the equipment. Detailed information is supplied in
“Technical Information” on page 5.
This manual uses the following standard safety protocol:
Storage
When transporting and storing the pump, the following
environmental requirements should not be exceeded:
Unpacking and Inspection
The shipping container is a double carton.
1. After opening the outer box, remove the foam packing.
2. Slit open the inner box.
3. Lift the pump with the plywood base out of the inner
box.
4. Remove the four bolts securing the pump frame to
the plywood base.
5. Locate the NW16 exhaust fitting and set it aside.
6. Inspect the pump for damage.
If there is shipping damage, contact the freight carrier
and your local Agilent sales office immediately.
7. Save the carton and packing materials.
Total weight of the package, including the pump, is
approximately 33.6 kg (74 lbs).
WARNING The warning messages are for
attracting the attention of the opera-
tor to a particular procedure or prac-
tice which, if not followed correctly,
could lead to serious injury.
CAUTION The caution messages are displayed
before procedures, which if not fol-
lowed, could cause damage to the
equipment.
NOTE The notes contain important
information taken from the text.
Temperature: –20 °C to 60 °C (–4 °F to 140 °F)
Relative humidity: 0 to 95% (non-condensing)
WARNING When unpacking the pump, be sure
not to drop it, and avoid any kind of
sudden impact or shock vibration
to it.
WARNING The TriScroll 300 weighs 26 kg
(57 lbs). To avoid injury, use proper
lifting techniques when moving the
pump.
NOTE Normal exposure to the environ-
ment cannot damage the pump.
Nevertheless, it is advisable to keep
the pump inlet closed until the
pump is installed in the system.

DRAFT 6/5/11
TriScroll 300 Inverter Vacuum Pump
2
Installation Requirements
Safety
Do not remove or modify any safety or insulating
equipment from the pump. To do so may create a serious
safety hazard and may void the warranty.
During operation, the following environmental
conditions should not be exceeded:
WARNING ❑ This pump is designed to pump
air and inert gases only; it is not
designed to pump explosive, flam-
mable, toxic, or corrosive gases.
They can cause bodily injury,
explosion, or fire.
❑ Install in an area that is not
exposed to rain, steam, or excessive
humidity. They can cause electric
shock, short circuits, and severe
bodily injury.
❑ Before inspecting or servicing the
pump, be sure the electrical supply
is disconnected.
❑ Consult a qualified electrician
whenever wiring the pump.
CAUTION Although the pump can pump trace
particulates normally found in the
atmosphere, it is not designed for
process solids, chemicals, powders,
solvents, condensates, or other par-
ticulates. They can damage the
equipment, degrade its performance,
or shorten its useful life.
Single and three phase pumps oper-
ate in a clockwise direction when
viewed from the motor end. (Note
the arrow on the pump frame.)
Improper rotation can cause perma-
nent damage to the pump.
Temperature: +5 °C to +40 °C (+41 °F to +104 °F)
Relative humidity: 0 to 95% (non-condensing)
CAUTION Do not block the fan ducts because
the pump can become overheated.
A pump surface temperature in
excess of 55 °C (131 ° F) is poten-
tially damaging. If such conditions
are observed, turn pump off and
allow to cool. Disassemble, inspect
for damage, and repair if necessary.
CAUTION To reduce the risk of electric shock,
do not expose to rain; store indoors.

3
TriScroll 300 Inverter Vacuum Pump
DRAFT 6/5/11
Power Cord
Several power cord options are available from your
Agilent dealer. Descriptions of the available power cords
and their ordering numbers are given in Table 1.
Grounding Instructions
This product should be grounded. In the event of an elec-
trical short circuit, grounding reduces the risk of electric
shock by providing an escape wire for the electric current.
This pump is equipped with a power cord that has a
grounding wire with an appropriate grounding plug. The
plug must be inserted into an outlet that is properly
installed and grounded in accordance with all local codes
and ordinances.
Extension Cords
If you must use an extension cord with this product:
❑ Agilent recommends using only extension cords
with a minimum of 16-gauge wire and a
maximum length of 25’ (7.6 m).
❑ Use only a 3-wire extension cord that accepts the
plug.
❑ Ensure the extension is in good condition.
Ensure the extension cord is rated high enough to carry the
current the products draws. An undersized cord causes a
drop in line voltage, resulting in loss of power and
overheating.
Circuit Breakers
Table 2 lists the circuit breaker capacity required for the
pump. Locate the switch or circuit breaker near the pump.
* Inverter with P/N S4897001 only
NOTE The pump must be connected to the
power supply using a high voltage
IEC-320 type power cord of at least 10
A capacity.
Table 1 Power Cord Selection
Country Power Cord Specification Order
Europe 10 A / 220-230 VAC, 2.5 m 656494220
Denmark 10 A / 220-230 VAC, 2.5 m 656494225
Switzerland 10 A / 230 VAC, 2.5 m 656494235
UK/Ireland 13 A / 230 VAC, 2.5 m 656494250
India 10 A / 220-250 VAC, 2.5 m 656494245
Israel 10 A / 230 VAC, 2.5 m 656494230
North
America
10 A / 230 VAC, 2.5 m 656494255
WARNING Check with a qualified electrician or
serviceman if the grounding instructions
are not completely understood, or if
you are in doubt as to whether the
product is properly grounded.
Do not modify the plug provided; if it
does not fit the outlet, have the proper
outlet installed by a qualified electrician.
Connect the product only to an outlet
that has the same configuration as the
plug.
Do not use an adapter with this
product.
WARNING Protect against short circuits by install-
ing a circuit breaker of the proper
capacity.
Table 2 Circuit Breaker Requirements
PTS03001INV 200-240 VAC
50/60 Hz
100-115 VAC
50/60 Hz*
Breaker capacity 10 A 20 A

DRAFT 6/5/11
TriScroll 300 Inverter Vacuum Pump
4
Operation
In order to reach ultimate vacuum, the pump must be left
running for about one hour with the inlet sealed.
Unlike conventional oil-sealed pumps, Agilent’s dry scroll
pumps do not have fluid to cleanse them of accumulated
dust and debris. Run the pump periodically at atmosphere
for a minute or two to flush out the pump. Flush the pump
regularly and adjust this schedule according to your
specific conditions.
Startup Procedure
1. Be sure that the vacuum system isolation valve is
closed.
2. Turn on power to the pump.
3. Open the isolation valve.
Shutdown Procedure
1. Close the vacuum system isolation valve.
This prevents debris in pump from being transported
into the vacuum system.
2. Turn off power to the pump.
Maintenance
Personnel responsible for pump operation and
maintenance must be well-trained and aware of the
accident prevention rules.
If a pump is to be discarded, it must be disposed of in
accordance with specific national and local standards.
NOTE Pump operation is interlock depen-
dent. The provided mating connec-
tor must be plugged into P1 to start
the pump.
NOTE When the controller is switched on,
an electronic self-test occurs, during
which an orange LED illuminates for
one second and the turns off for two
seconds. During this time, the pump
will not start.
This self-test time is not required if
the pump is already powered, as
when remotely or serially operated.
WARNING ❑ Death may result from contact
with high voltages. Always take
extreme care and observe the acci-
dent prevention regulations in force.
❑ When the machine is powered
up, be careful of moving parts and
high voltages.
❑ If you have to perform mainte-
nance on the pump after a consider-
able time in operation, allow the
pump to cool as the temperature of
the outer surface may be in excess of
55 °C (131 °F).
❑ Always disconnect your power
supply to the pump before beginning
maintenance work.
NOTE Before returning the pump to the
factory for repair, the “Health and
Safety” sheet attached to this instruc-
tion manual must be completed and
sent to the local sales office. A copy
of the sheet must be inserted in the
pump package before shipping.

5
TriScroll 300 Inverter Vacuum Pump
DRAFT 6/5/11
Technical Information
Table 3 Specifications
Model TriScroll™ 300 Inverter Dry Scroll Vacuum Pump (PTS03001INV)
Interface dimensions See Figure 1 on page 6
Peak pumping speed 250 l/m, 15m
3
/hr (8.9 cfm)
See Figure 2
Media Clean air. No toxic, corrosive, explosive or particulate forming gases
Ultimate pressure (Torr) 1.0 x 10−
2
Torr (1.3 x 10−
2
mbar)
Maximum inlet pressure 1.0 atmosphere (0 psig)
Maximum outlet pressure 1.1 atmosphere (1.5 psig)
Inlet connection NW25
Exhaust connection Female 1/4" National Pipe Thread (NW16 adapter provided)
Gas ballast Female 1/4" National Pipe Thread (40 Micron sintered filter provided)
Ambient operating temperature 5 °C to 40 °C (41 °F to 104 °F)
Storage temperature –20 °C to 60 °C (–4 °F to 140 °F)
Motor rating 0.67 HP (0.5 kW)
Operating voltage 50-60 Hz:200-240 VAC Single-phase / 100-120 VAC Single Phase* ±10%
*Inverter with P/N of S4897001 ONLY
Motor line current 200 VAC; 5 A
240 VAC; 4.2 A
Motor thermal protection Automatic
Operating speed 35-65 Hz Factory setting: 62 Hz, 1800 RPM
Cooling system Air-cooled
Weight Pump only: 26 kg (57 lbs)
Shipping weight: 33.6 kg (74 lbs)
Noise level (per ISO 11201) Variable with frequency, 55-68 dB(A)
Vibration level at inlet (per ISO 10816-1) Variable with frequency
Main fuse Type H; 10 A, 250 V (Littlefuse 0216010.HxP or equivalent)
Installation and storage Installation category 2, indoor usage and storage
Pollution degree 2
CSA/CUS compliance CAN/CSA-C22.2 No. 61010-1-04
U/L 61010-1, second edition
Altitude 2000 m

DRAFT 6/5/11
TriScroll 300 Inverter Vacuum Pump
6
Figure 1 Interface Drawing with Dimensions
Figure 2 Pumping Speed Curves

7
TriScroll 300 Inverter Vacuum Pump
DRAFT 6/5/11
Figure 3 TriScroll 300 Inverter Vacuum Pump
Figure 4 Inverter Interface
1. Cowling Screws; M5 (3)
2. Cowling
3. Inlet (NW25)
4. Inlet Screen
5. NW16 Exhaust Adapter (Not shown)
6. Bearing Purge Port (1/4" National Pipe Thread)
7. Pump Frame
8. Frame Screws; M6 (4)
9. Gas Ballast Port (1/4" National Pipe Thread)
10. Mounting Holes; 11 mm diameter thru (8)
11. Rubber Feet (4)
1. Power Connector (IEC 320)
2. On/Off Switch
3. Serial Port J2
4. Interlock Port P1
1
2
3
4
11
8
7
6
10
9
1
2
3
4

DRAFT 6/5/11
TriScroll 300 Inverter Vacuum Pump
8
Pump Electrical Controller
The pump is powered by an inverter that converts single
phase line power into 3-phase power that drives an
induction motor at a user selectable frequency.
Several operational variables are modifiable through the
J2 serial port when using Agilent T-Plus software. A
number of additional system variables are also viewable.
Pump operation is interlocked through the P1 connector.
Pins 4 and 5, and Pins 8 and 9, must be connected
together to enable operation. A prewired connector is
supplied with the pump and should be plugged into P1.
If the pump requires more than 750 Watts to run at the set
frequency, the pump will be power limited and the output
frequency will be reduced. This mode is known as
autotuning.
At pump start, the drive frequency is ramped up over
several seconds. This provides for smooth starting and
eliminates large in-rush currents.

9
TriScroll 300 Inverter Vacuum Pump
DRAFT 6/5/11
Technical Specifications
❑ Input voltage: 200 -240 V/100-120 V*,
50 - 60 Hz
* Inverter with P/N S4897001 only
❑ Max frequency: 65 Hz, factory set @ 62Hz
❑ Normal Operation maximum power: 750 W
❑ Protection level: IP 20
Remote speed setting allows you to control rotational
speed using a 0-10 V analog input:
❑ V
in
> 9 V: Driving frequency will be the full
speed (factory set @62 Hz)
❑ V
in
<1 V: Driving frequency will be the
minimum speed (35 Hz)
Figure 5 Driving Frequency vs. Analog Input
Table 4 P1 Interlock
PIN
#
SIGNAL NAME IN/OUT
1 VPI relay contact 1 Out
2 0-10 V remote control In
3 No Connection
4 Start (-) - Connect to Pin 5 In
5 Groundout Out
6 VPI relay contact 2 Out
7 No Connection
8 Start (+) - Connect to Pin 9 In
9 24 V Out
Table 4 P1 Interlock
PIN
#
SIGNAL NAME IN/OUT
NOTE Pump operation is interlock depen-
dent. The provided mating connec-
tor must be plugged into P1 to start
the pump.

DRAFT 6/5/11
TriScroll 300 Inverter Vacuum Pump
10
Serial Interface Specification RS485 and
RS232
Physical level: RS232 or RS485
Maximum baud: 9600, 8 data bit, no parity, 1 stop bit.
Table 5 J2 - Serial Port
PIN
#
SIGNAL NAME
1 + 5 V out
2 TX (RS232)
3 RX (RS232)
4 Spare
5 GND
6 A+ (RS485)
7 Spare
8 B- (RS485)
9 Spare
Table 6 T-Plus Software Variables
WIN TYPE DESCRIPTION
000 Logical Start/Stop
(1=START; 0=STOP)
001 Logical Low Speed
[0=OFF / 1=ON]
008 Logical Remote/Serial Configuration
(1=REMOTE; 0=SERIAL)
102 Numerical Set Point Value
(Hz)
105 Numerical Set Point Hysteresis(%)
[0-100]
108 Numerical Baud Rate
(0-4)
[600-1200-2400-4200-9600]
117 Numerical Low Speed Adjust
(Hz)
120 Numerical Rotational Frequency Setting
[Hz] (High speed adjust)
200 Numerical Bus Current
[mA]
201 Numerical 3 Phase Voltage
[Vrms]
202 Numerical Power
[W]
203 Numerical Driving Frequency
[Hz]: (current driving
frequency)
205 Numerical Status:
❑ 0=stop
❑ 2=ramp
❑ 3=autotuning
❑ 5=normal
❑ 6=fail

11
TriScroll 300 Inverter Vacuum Pump
DRAFT 6/5/11
Using T-Plus Software To Change The Target
Frequency
1. Install T-Plus software on your PC by running
setup.exe.
2. Using a 9-pin serial cable, connect your PC to the J2
serial port on the inverter (Figure 4).
3. Start the pump using the On/Off switch. The provided
Interlock Connector must be installed in P1.
4. Start the T-Plus software and Figure 6 appears.
Figure 6 T+ Pumps List
5. Click Open Control Panel and Figure 7 appears.
206 Numerical Error Code:
❑ Bit 7: motor block
❑ Bit 6: short circuit
❑ Bit 5: undervoltage
❑ Bit 4: spare
❑ Bit 3: power fail
❑ Bit 2: controller overt
❑ Bit 1: pump overt
❑ Bit 0: spare
211 Numerical Controller Temperature
[°C]
216 Numerical Environment Temperature
[°C]
300 Numerical Cycle Time
[min]
301 Numerical Cycle Number
302 Numerical Pump Life
[h]
319 Alphanumeric Controller Model
323 Alphanumeric Controller Serial Number
325 Alphanumeric Electrical Modification Level
500 Logical Monitor Mode (write only)
503 Numerical RS485 Serial Address Setting
[0-31]
504 Logical Serial Type Select
(0=RS323; 1=RS485)
Table 6 T-Plus Software Variables (Continued)
WIN TYPE DESCRIPTION
Table 7 Status LEDs
LED STATUS CONTROLLER STATUS
Off Stop
Green flashing Ramp or Autotuning
Green Normal Operation
Red Fail
Orange + Off Reset + selftest
NOTE When the controller is switched on,
an electronic self-test occurs, during
which an orange LED illuminates for
one second and the turns off for two
seconds. During this time, the pump
will not start.
This self-test time is not required if
the pump is already powered, as
when remotely or serially operated.

DRAFT 6/5/11
TriScroll 300 Inverter Vacuum Pump
12
6. Open the Speed Settings directory, and click Target
Frequency.
Figure 7 T-Unknown Pump
7. Enter the desired operating frequency into Insert New
Value. This must be an integer between 35 and 65.
8. Click Send. The pump immediately tries to change to
the new target frequency. If the pump requires more
than 750 Watts to attain the target frequency, the
pump is power limited and will run at a lower
frequency (auto-tuning mode). This condition will
continue until the power required drops below 750
Watts.
The target frequency is stored in the inverter even
when power to the pump is removed.
Gas Ballast
The pump incorporates an automatic gas ballast to
prevent water and other condensates from accumulating
within the pump. The standard configuration is a sintered
filter installed in the 1/4" National Pipe Thread gas ballast
port (item 9 on Figure 3 on page 7). This allows enough
atmospheric air to enter the pump in order to purge
condensates while not effecting pump ultimate pressure
or pumping speed.
For applications where the ingress of atmospheric air is
undesirable, dry nitrogen at a flow rate of ≈ 5 lpm can be
bled into the gas ballast port. See “Purge Kit” below.
Blocking of the gas ballast port is not recommended.
Bearing Purge
A 1/4" National Pipe Thread bearing purge port (item 6 on
Figure 3 on page 7) protects the main crankshaft bearings
in applications where large amounts of water are being
pumped. In the standard configuration, this port is sealed.
To enable the bearing purge, dry nitrogen at a flow rate of
≈ 5 lpm can be bled into the bearing purge port. This gas
supply should be maintained at 2 psig or less and must be
kept below 5 psig. See “Purge Kit” below.
Purge Kit
A purge kit (Agilent part number PTSPURGEKIT) to
properly purge either the bearing purge or the gas ballast
is available. This kit contains a flow meter and all
necessary valving and tubing.
Isolation Valve Kit
Scroll pumps return to atmospheric pressure quickly
when shut off. Thus, the installation of a fast acting,
automatic, normally closed isolation valve is strongly
recommended to prevent pump debris from being
transported back into the vacuum chamber when the
pump is turned off:
❑ The opening of this valve must occur ≥ 350 ms
after pump startup.
❑ Valve closing must occur ≤ 250 ms after pump
shut off.
Use an NW25 or an NW40 valve and mount it as close as
possible to the pump inlet. Mounting to the pump inlet is
ideal.
Agilent offers a variety of manual, electromagnetic and
electropneumatic controlled vacuum valves for vacuum
applications. The Agilent Vacuum Pump Isolation (VPI)
Valve is highly recommended for vacuum pump isolation
applications (Figure 8).