U-5000AT Ultrasonic Nebulizer Operator`s Manual

U-5000AT Ultrasonic Nebulizer Operator`s Manual
U-5000AT Ultrasonic Nebulizer
Operator’s Manual
U-5000AT Operator Manual
COPYRIGHT
Copyright SD Acquisition, Inc.,
DBA CETAC Technologies
480001
REPRODUCTION
All rights reserved. Reproduction or transmission of
this document in whole or in part, and by any means
without the express written consent of the copyright
owner or authorized agent is prohibited. Requests for
additional copies of this, or any other CETAC
publication, can be filled by contacting an authorized
distributor or
CETAC Technologies
Customer Service & Support
14306 Industrial Road
Omaha, Nebraska 68144, USA
Phone
(800) 369-2822 (USA only)
Phone
(402) 733-2829
Fax
(402) 733-1932
E-mail custserv@cetac.com
DISCLOSURE
This document contains CETAC proprietary data and
is provided solely to its customers for their express
benefit of safe, efficient operation and maintenance of
the product described herein. Use or disclosure of
CETAC proprietary data for the purpose of
manufacture or reproduction of the item described
herein, or any similar item, is prohibited, and
delivery of this document shall not constitute any
license or implied authorization to do so.
REVISIONS
CETAC Technologies strives to provide the scientific
community with an unparalleled combination of
effective technology and continuing value. Modular
upgrades for existing instruments will continue to be
a prime consideration as designs progress.
CETAC Technologies reserves the right to revise this
document and/or improve products described herein
at any time without notice or obligation. Warranty
registration entitles the named owner exclusively to
manual change pages/new editions as they are
published.
FCC NOTICE
This equipment has been tested and found to comply
with the limits for a Class A digital device, pursuant
to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against
harmful interference when the equipment is operated
in a commercial environment.
This equipment
generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance
with the instruction manual, may cause harmful
interference to radio communications. Operation of
this equipment in a residential area is likely to cause
harmful interference in which case the user will be
required to correct the interference at his own
expense.
SAFETY
Instruments, accessories, components or other
associated materials may not be returned to CETAC
Technologies if contaminated with biohazard or
radioactive materials, infectious agents, or any other
materials and/or conditions that could constitute a
health or injury hazard to CETAC employees. Call
Customer Service and Support if there is any
question or doubt relative to decontamination
requirements.
CAUTION
and
WARNING
statements, as applied in this document, shall be
interpreted consistent with the following context:
CAUTION applies only to potential property damage
conditions; WARNING applies to potential personal
injury conditions, in combination with or exclusive of
potential property damage.
All user-serviceable components are specifically
identified in this document as such; the balance
shall be assumed to require the expertise of a
factory
service
technician/engineer
for
adjustment, repair, replacement, modification,
etc. Others not so qualified and performing
these actions shall do so at their own risk.
Furthermore, never operate the instrument
without first reading and understanding the U5000AT Ultrasonic Nebulizer Operator’s Manual
and ensuring the nebulizer is operated safely
and properly. Under all conditions the user
must use safe laboratory procedures during the
use of this product.
ORIGINAL PACKAGING
Retain original factory packaging for moves and
factory return shipments. Shipping in anything other
than the original fitted foam and container can result
in incidental damage from which the purchaser will
not be protected under warranty.
CANADIAN DEPARTMENT OF
COMMUNICATIONS COMPLIANCE
STATEMENT
This equipment does not exceed Class A limits per
radio noise emissions for digital apparatus set out in
the Radio Interference Regulation of the Canadian
Department of Communications. Operation in a
residential area may cause unacceptable interference
to radio and TV reception requiring the owner or
operator to take whatever steps are necessary to
correct the interference.
U-5000AT Operator Manual
AVIS DE CONFORMITE AUX NORMES DU
MINISTERE DES COMMUNICATIONS DU
CANADA
Cet equipment ne depasse pas les limites de Classe A
d'emission de bruits radioelectriques pour les
appareils numeriques telles que perscrites par le
Reglement sur le brouillage radioelectrique establi
par le ministere des Communications du Canada.
L'exploitation faite en milieu residentiel peut
entrainer le brouillage des receptions radio et
television, ce qui obligerait le proprietaire ou
l'operateur a prende les dispositions necessaires pour
en eliminer les causes.
VDE NOTICE
We hereby certify that the U-5000AT Ultrasonic
Nebulizer is in compliance with Postal Regulation
1046/1984 and is RFI suppressed.
The marketing and sale of the equipment was
reported to the German Postal Service. The right to
retest this equipment to verify compliance with the
regulation was given to the German Postal Service.
SAFETY NOTICE
The U-5000AT Ultrasonic Nebulizer or its
components may not be returned if they are
contaminated by radioactive materials, infectious
agents, or other materials constituting health
hazards to CETAC employees.
U-5000AT Operator Manual
Table of Contents
1.0 General Description
3
2.0 Guideline to Installation
3
3.0
4
Installation
3.1 Utility Cart Assembly
4
3.2 Constant Temperature Cooling System (CTCS) Installation
4
3.3 Drainage System Assembly
5
3.4 Liquid Sample Delivery and Rinse System
5
3.5 Perform ICP Torch Interface
6
4.0 Initial Operation Procedure
8
5.0 ICP Operation
10
6.0 System Optimization
10
7.0 Routine Operation
11
7.1 Start-up Procedure
11
7.2 Shutdown Procedure
11
8.0 Maintenance
12
8.1 Transducer Assembly Removal
12
8.2 Transducer Assembly Installation
12
8.3 RF Circuit Breaker
13
8.4 Main Fuse Replacement
13
8.5 Pump Tubing Replacement
14
8.6 Drain Tubing Replacement
14
U-5000AT Operator Manual
Figure 1: Top View of U-5000AT
16
Figure 2: Front View of U-5000AT
18
Figure 3: Rear View of U-5000AT
20
Appendix 1 - ICP/U-5000AT Optimization Procedure
22
Appendix 2 - Trouble Shooting
25
Appendix 3 - Packaging Check List
26
Appendix 4 - U-5000AT AC Wiring Diagram
28
2
U-5000AT Operator Manual
1.0 General Description
The CETAC U-5000AT is an enhanced sample introduction system for
ICP spectrometry. The system consists of an air-cooled piezoelectric
transducer, an aerosol chamber, a temperature controlled heated Utube and a temperature-controlled condenser. In addition, a built-in
drain pump and an auto-tuned stabilized power supply provide
excellent reproducibility and reliability.
To operate the U-5000AT, a liquid sample is pumped onto the
piezoelectric transducer where the ultrasonic action efficiently converts
it to a fine, dense aerosol. The nebulizer carrier gas flow then
transports the wet aerosol through a heated U-tube where the solvent
is vaporized. Subsequently, most of the solvent vapor is removed from
the aerosol stream by passing the stream through a chilled condenser.
The result is a dry, analyte-laden aerosol which is introduced to the
plasma.
The U-5000AT improves limits of detection by both increasing the
analyte transport efficiency and by stripping the solvent from the
aerosol thereby reducing the solvent load on the plasma. Compared to
typical pneumatic nebulizers, detection of sample analytes is generally
enhanced by up to an order of magnitude when using the U-5000AT
Ultrasonic Nebulizer. The enhancement in sensitivity is found with
both ICP-AES and ICP-MS instruments.
2.0 Guideline to Installation
As with other laboratory equipment, the U-5000AT is a sensitive
instrument which should be handled with care. The operator should
read this manual and study the associated diagrams before installing or
operating the U-5000AT system.
To achieve optimum performance from the U-5000AT, the ICP system
must be in good operating condition. Check the ICP performance using
a conventional pneumatic nebulizer before the U-5000AT installation.
If the detection limits do not meet instrument specifications, consult the
ICP manufacturer for assistance. If the detection limits are within the
manufacturer's specifications, begin installation of the U-5000AT
system.
3
U-5000AT Operator Manual
3.0 Installation
Upon receipt of the U-5000AT system, inspect all items for damage
according to the packaging checklist in the back of this manual.
Installation of each component is discussed below.
Caution
Check the transducer cable to determine if it has been disconnected for
shipment. Upon unpacking the unit, reconnect the cable to the
connector located on the end of the transducer assembly (Figure 1:
B,D). Failure to do so will trip (open) the RF circuit breaker.
3.1 Utility Cart Assembly
The utility cart provides a mobile station for the U-5000AT system. Set
up the cart, according to the directions in the cart container. Place the
U-5000AT on the top shelf with the Constant Temperature Cooling
System (CTCS) and the waste bottle on the bottom shelf.
3.2 Constant Temperature Cooling System (CTCS)
Installation
1)
Connect the two insulated cooling hoses to the inlet and outlet
of the CTCS.
2)
Connect the COOLANT OUT of the CTCS to the COOLANT
IN of the U-5000AT.
3)
Connect the COOLANT IN of the CTCS to the COOLANT OUT
of the U-5000AT.
4)
Remove the CTCS reservoir cover and thermometer. Pour 5
liters of 1:1 ethylene glycol:water mixture into the CTCS
reservoir. Replace the reservoir cover and ensure that the
thermometer is inserted all the way into the hole in the center
of the cover.
Note:
After initial use of the CTCS, add additional coolant to the reservoir to
account for the coolant volume required to fill the U-5000AT condenser
and hoses. Fill to within 1 inch of the top of the CTCS reservoir.
4
U-5000AT Operator Manual
3.3 Drainage System Assembly
The U-5000AT drainage system removes both sample waste from the
spray chamber and condensed solvent from the condenser. It consists
of a built-in four roller peristaltic pump and the associated pump tubing
and connectors (Figure 3: H,I,J,K,L). Connect the length of 1/8" I.D.
Tygon tubing to the outlet of the "T" fitting (Figure 3: J) from the pump.
Place the other end of the tubing into the waste bottle. The drain and
pump tubing on the U-5000AT are user replaceable. To replace, refer
to Sections 8.5 and 8.6.
3.4 Liquid Sample Delivery and Rinse System
The sample/rinse adapter (Figure 2: G) holds the sample tubing in
place. It is mounted and aligned during assembly and should require
no adjustment prior to use.
Sample liquid is delivered to the U-5000AT transducer through 0.5 mm
I.D. PEEK sample tubing which is inserted through the glass sample
inlet tube (Figure 2: K), located at the base of the aerosol chamber
(Figure 2: F). For proper sample delivery, the end of the sample inlet
tubing is cut at an angle of approximately 60 degrees. As previously
mentioned, the sample/rinse adapter is mounted and aligned during
assembly, however, it may become necessary to adjust this adapter or
remove it and re-cut the end of the tubing periodically for optimum
sample delivery. This procedure is outlined below:
1)
Remove the three acorn nuts from the aluminum heat shield
using the wrench stored in the U-5000AT chassis (Figure 1: F).
Remove the heat shield by lifting the heat shield off the studs
and then sliding it to the right past the ball joint clamp and lift
off. This cover is designed for a snug fit for proper safety.
2)
Remove the sample/rinse adapter from the glass sample inlet
tube by carefully sliding the adapter along the glass sample
inlet tube.
3)
Re-cut the sample tubing at a 60 degree angle using a sharp
razor blade. An improper cut or a blunt tip may cause
inefficient nebulization.
4)
Loosen the compression fitting nut which holds the PEEK
sample inlet tubing. Adjust the tubing position to account for
the removed section. Tighten the sample inlet compression
fitting nut to hold the tubing in place.
5)
To replace the adapter, first insert the sample inlet tubing, then
slide the adapter back onto the glass tube.
5
U-5000AT Operator Manual
6)
Slide the adapter until the sample tubing touches the face of the
transducer, then, slightly pull the adapter back to form a very
narrow gap (approximately 0.2 to 0.4 mm) between the
transducer and the tubing.
This position allows proper
adhesion of sample solution onto the transducer without any
contact between the tubing and the transducer. At this point,
the end of the sample tubing should be parallel to the
transducer face.
7)
If the length of the sample inlet tubing is not correct, remove
the sample inlet adapter and repeat steps 4 through 6 until
proper adjustment is achieved.
8)
Replace the aluminum heat shield and tighten the three acorn
nuts.
For high concentrations of sulfuric and nitric acid it is recommended
that the Peek sample inlet tubing be replaced with the clear Tefzel
sample inlet tubing supplied as an accessory with the U-5000AT. The
Tefzel tubing performs much better when using these types of acid. To
install the Tefzel tubing, follow the above outlined procedure for the
Peek sample inlet tubing.
The auxiliary rinse port on the sample/rinse inlet adapter (Figure 2: J)
provides the capability for rapidly cleaning the transducer faceplate
between samples. This reduces memory effects. A rinse bottle is
provided for this purpose. The auxiliary rinse port should always have
the male luer plug inserted if the rinse port is not utilized. (The
CETAC Auto Rinse System 2000 is available for automatic rinsing
when an autosampler is used). To rinse between samples:
1)
Remove the male luer plug from the auxiliary rinse port of the
sample/rinse adapter (Figure 2: J) with a counter-clockwise
twist.
2)
Attach the male luer, on the end of the gum rubber tubing of
the rinse bottle, into the rinse port using a clockwise motion.
3)
Fill the auxiliary rinse bottle with deionized water.
4)
Gently squeeze the handle of the bottle a few times to deliver
deionized water to the transducer face. Rinse water should
splash around the transducer area of the aerosol chamber each
time the handle is squeezed.
3.5 Perform ICP Torch Interface
Depending on the ICP manufacturer and the model of the ICP, a torch
adapter or spray chamber adapter is supplied for the interfacing of the
U-5000AT to the ICP. The torch adapter requires removal of the
6
U-5000AT Operator Manual
pneumatic nebulizer and the spray chamber. The adapter then
connects to the bottom of the torch. The spray chamber adapter
requires removal of the pneumatic nebulizer and the spray chamber
baffle. The spray chamber adapter is then inserted inside the spray
chamber.
1)
If using a torch adapter, the pneumatic nebulizer and the spray
chamber must be removed. If using a spray chamber adapter, the
pneumatic nebulizer and the spray chamber baffle must be removed
leaving the spray chamber in place.
2)
Mount the spray chamber/torch adapter.
3)
Make sure that the power is disconnected from the U-5000AT
and the heated U-tube is cool before continuing.
4)
Remove the bronze-colored plastic cover from the U-5000AT.
5)
Remove the three acorn nuts from the aluminum heat shield.
Remove the heat shield by lifting the heat shield off the studs and then
sliding it to the right past the ball joint clamp and lift off. This cover is
designed for a snug fit to ensure maximum safety.
6)
Locate the glass sample outlet on the back of the white plastic
condenser housing (Figure 1: U).
7)
Connect the glass sample outlet tube of the U-5000AT to the
ICP torch/spray chamber adapter using the 3/16" I.D. Tygon tubing.
8)
Replace the heat shield and the bronze-colored plastic cover.
Ensure the ICP torch has remained properly aligned and located in the
induction coil according to the ICP manufacturers instructions.
Connect the nebulizer carrier gas from the ICP instrument to the U5000AT using the ARGON IN connector (Figure 3: M) and 3/16" I.D.
Tygon tubing.
Note:
Some ICPs utilize a pressure switch on the argon nebulizer gas that will
not allow the user to reduce the pressure enough to get the 0.7 L/min
flow of argon for the U-5000AT. With these ICPs, it is necessary to use
an auxiliary flow restrictor between the nebulizer gas supply and the
U-5000AT ARGON IN connector for control of the nebulizer argon flow.
This flow restrictor will be provided by CETAC when necessary.
7
U-5000AT Operator Manual
4.0 Initial Operation Procedure
1)
Verify that the voltage select plug on the U-5000AT is stamped
with the proper operating line voltage (100 VAC or 115 VAC or
230 VAC) (Figure 1: T and Figure 2: P). If the nebulizer is to
operate on a voltage other than that stamped on the plug,
contact CETAC or an authorized service representative for the
proper plug.
2)
Plug in the power cords for the Constant Temperature Cooling
System and the U-5000AT.
Set the CTCS temperature dial to 5 °C and turn on the power switch. It
will take approximately 90 minutes to reach this temperature and
stabilize. The cooling unit has stabilized when the heater light on the
front panel intermittently lights and the thermometer reads 5°C. If the
thermometer is not at 5 °C, adjust the temperature dial slightly.
Note:
After initial use of the CTCS, add additional coolant to the reservoir to
account for the coolant volume required to fill the U-5000AT condenser
and the hoses. Fill to within 1 inch of the top of the CTCS reservoir.
4)
Adjust the pump speed knob on the rear of the U-5000AT to 3
(Figure 3: G). Ensure the drain pump pressure shoe is engaged.
5)
Press the red POWER switch of the U-5000AT (Figure 2: S).
The red light will illuminate. The temperature controller for
the heated U-tube is preset at 140 °C and should stabilize in
about 10 minutes (Figure 2: U). The temperature controller has
stabilized when the "on" light on the front left of the
temperature controller is intermittently lit and the two
temperatures on the display both read 140 °C +/- 2 °C. The U5000AT is equipped with a thermal safety switch (Figure 1: O).
The thermal safety switch protects the unit from thermal
overload.
6)
Once the cooling and heating temperatures stabilize at 5 °C and
140 °C, respectively, turn on the nebulizer gas from the ICP and
adjust to 0.7 L/min.
7)
Connect the sample peristaltic pump to the 0.5 mm I.D. Peek
sample tubing. If the Peek sample tubing is not long enough to
connect to the sample peristaltic pump, a three foot piece of 0.5
mm I.D. Tefzel extension tubing and necessary fittings has been
included with the unit. Refer to the illustration below for
proper assembly of the fittings.
8
U-5000AT Operator Manual
8)
Caution
Turn on the pump and deliver deionized water at 2.5 mL/min.
Ensure the transducer cable has not become disconnected. If it
has, connect the cable between the connector on the end of the
transducer and the connector in the U-5000AT chassis (Figure 1:
B,D,E and Figure 2: A).
9)
Press the yellow OPERATE switch (Figure 2: R). The yellow
light will illuminate and a mist should be observed inside the
aerosol chamber. The yellow light is an indication of RF power
to the transducer. (If this light does not illuminate after the
OPERATE switch is pressed, the RF oscillator is not operating.
Refer to Appendix 2 of this manual).
10)
Prepare 250 mL of a 0.5% (v/v) solution of hydrofluoric acid and
nebulize it for 20 to 30 seconds. The mist in the aerosol
chamber should be dense at this point. If not, refer to Appendix
2 of this manual.
Note:
Although this dilute hydrofluoric acid will not harm the glassware system
of the U-5000AT or the ICP when nebulized for short periods, it should
only be used when the transducer face becomes dirty, which is
evidenced by a weak or intermittent mist. Reserve the remaining
solution for future use.
11)
Begin to nebulize deionized water.
12)
Adjust the PUMP SPEED knob (Figure 3: G) on the back of the
U-5000AT such that the drain pump draws out excess sample
solution faster than the sample pump is delivering the sample.
9
U-5000AT Operator Manual
If the pump speed is too slow, the aerosol chamber (Figure 2: V)
will begin to fill with liquid. Should this occur, press the FAST
PUMP switch; the green light will illuminate (Figure 2: T).
After the excess liquid has been removed from the aerosol
chamber drain tube, press the green switch again; the green
light will go out and the pump will return to its previous speed.
At this point, increase the PUMP SPEED to prevent excess
solution from collecting in the spray chamber.
13) Turn off the yellow OPERATE switch, the sample peristaltic
pump, and the nebulizer gas supply to the ICP.
5.0 ICP Operation
1)
Ignite the ICP plasma as instructed in the ICP operating
manual. The nebulizer gas flow rate should be set at 0.7 L/min.
2)
Press the yellow OPERATE switch to energize the transducer of
the U-5000AT.
3)
Begin aspirating a 100 µg/mL solution of yttrium into the
plasma. The emission color and intensity in the plasma should
be similar to that found when 1000 µg/mL of yttrium aspirated
with a pneumatic nebulizer. If the yttrium emission is weak,
check for gas leaks in the U-5000AT/ICP system.
6.0 System Optimization
It may be necessary to optimize the ICP system after installation of the
ultrasonic nebulizer. Optimization procedures may include adjustment
of the nebulizer gas and the auxiliary gas flow rates, the sample uptake
rate, the plasma gas flow rate and the viewing height. Usually the
signal-to-noise ratio or signal-to- background ratio is the primary
criterion for optimization. During optimization, ensure the plasma is
properly sustained. Extreme conditions which may cause unstable
plasma formation, torch erosion, or high reflected power should be
avoided. For detailed instructions on system optimization, refer to
Appendix 1 in the back of this manual. After the system has been
optimized, the ultrasonic nebulizer is ready for routine operation.
10
U-5000AT Operator Manual
7.0 Routine Operation
7.1 Start-up Procedure
1)
If the constant temperature cooling system is off, turn it on and
let the temperature stabilize (approximately 90 minutes).
2)
Press the POWER switch of the U-5000AT. The heated U-tube
temperature should stabilize in about 10 minutes.
3)
Initiate the plasma according to the ICP operating manual.
Adjust the ICP operating conditions to previously optimized
values.
4)
Press the OPERATE switch.
5)
Turn on the sample peristaltic pump and deliver deionized
water to the transducer. The ultrasonic nebulizer should
stabilize in about 15 minutes. If necessary, aspirate the dilute
hydrofluoric solution to achieve a dense aerosol. The ultrasonic
nebulizer is now ready for routine analysis.
7.2 Shutdown Procedure
1)
Aspirate deionized water for at least 3 minutes. Momentarily
rinse the entire transducer faceplate and its surrounding area
by introducing water through the auxiliary rinse port of the
aerosol chamber (Figure 2: J).
This procedure prevents
accumulation of corrosive liquid samples on the transducer
faceplate and the glassware.
2)
Turn off the sample peristaltic pump and let the nebulizer run
dry for about 15 seconds.
3)
Turn off the OPERATE switch.
4)
Press the FAST PUMP switch and allow the pump to drain all
liquid from the system. All the liquid will be drained when no
liquid can be seen flowing out of the drain tubing.
5)
Turn off the green FAST PUMP switch followed by the red
POWER switch. If desired, the CTCS may be left on overnight
to eliminate the 90 minute cool-down time.
6)
Turn off the plasma and the gas supplies according to the ICP
system operating manual.
11
U-5000AT Operator Manual
8.0 Maintenance
Caution
The U-5000AT should be turned off and the power cord unplugged
before performing any maintenance on the instrument!
8.1 Transducer Assembly Removal
1)
Turn off the ultrasonic nebulizer and the ICP as described in
the shutdown procedure.
2)
Disconnect the transducer cable connector from the end of the
transducer assembly (Figure 1: D).
Note:
The orientation of the assembly and the transducer mounting screws
before removal so that the new transducer can be oriented the same
way!
3)
Pull out the hex-head transducer wrench stored in the U5000AT chassis (Figure 1: F). Hold the transducer assembly
firmly with one hand and remove the three spring-loaded socket
head screws using the wrench.
4)
Carefully slide the transducer assembly and the O-ring from the
aerosol chamber. Wipe off any droplets in the opening of the
aerosol chamber without touching the fragile glass sample tube.
8.2 Transducer Assembly Installation
1)
The spare transducer assembly and screw/spring set are
packaged in a protective handling box which should not be
discarded. Remove the spare transducer from the box and
ensure the transducer face is clean. This can be accomplished
by gently wiping the crystal face with a water moistened lintfree tissue.
2)
Place the O-ring back into the aerosol chamber and ensure the
O-ring is smoothly seated against the glass bezel inside.
3)
Align the spare transducer assembly with the screw holes in the
aerosol chamber stand and slide it into the aerosol chamber.
Hold the transducer assembly with one hand and replace the springloaded socket head screws. The heads of the screws should be flush
12
U-5000AT Operator Manual
with the second fin (from the cable connector end) of the transducer
heat sink.
Caution
Do not over tighten the screws! Proper seating of the O-ring can be
observed through the aerosol chamber.
5)
Reconnect the transducer cable connector to the end of the
transducer assembly and replace the transducer wrench.
8.3 RF Circuit Breaker
The RF circuit breaker will trip if an open circuit occurs anywhere in
the RF cable and the OPERATE switch is on. If an open does occur the
RF circuit breaker will trip in approximately seven seconds. The RF
circuit breaker is located on the right rear of the unit under the square
black heat sink (Figure 3: C). To reset the RF circuit breaker:
1)
Turn the unit off.
2)
Check to ensure the RF cable between the transducer heat sink
and the U-5000AT chassis is installed and securely connected
(Figure 1: B,D,E and Figure 2: A).
3)
Reset the RF circuit breaker by simply pressing the plastic
mechanism in until it latches.
4)
Attempt to operate the unit.
subsequently
trips,
contact
representative or CETAC.
If the RF circuit breaker
your
authorized service
8.4 Main Fuse Replacement
The main fuses are located in the rear of the unit and are part of the
power cord connector (Figure 3: E).
Caution
1)
Turn off the unit and unplug the power cord.
2)
Use a small flat blade screwdriver to pop open the fuse holder.
3)
Replace the defective fuse with a GMC 5A, 125V slo-blow if
operating on 100/115 VAC or a GMC 2.5A, 250V slo-blow if
operating on 230 VAC.
Use of a different fuse other than the one specified can damage the
electrical components of the U-5000AT!.
13
U-5000AT Operator Manual
4)
Replace the power cord and attempt to operate the unit. If the
new fuse subsequently blows, contact your authorized service
representative or CETAC.
8.5 Pump Tubing Replacement
Phar-Med tubing (3/32" I.D., 1/32" wall) is used for the peristaltic drain
pump. This tubing may be purchased pre-cut from CETAC.
1)
Unlatch the pressure shoe.
2)
Remove the old pump tubing by snapping the tubing connectors
out of the tubing keeper (Figure 3: I).
3)
If the tubing is not ordered from CETAC, cut 2 3-3/4" long
pieces using a razor blade. Attach the plastic connectors.
4)
Place the new tubing with connectors in the tubing keeper.
Firmly press the connector into the tubing keeper slot until it
locks into place.
8.6 Drain Tubing Replacement
1)
To replace the drain tubing, turn off the operate switch and the
sample peristaltic pump.
2)
Turn on the FAST PUMP switch and pump all liquid from the
system.
3)
Turn off the U-5000AT and unplug the power cord and all
external tubing and hoses.
4)
Remove the brown-colored plastic cover. Carefully turn the
unit upside down. Support the unit under the white plastic
condenser using a book, for example, to make the bottom of the
unit level.
Use a flat blade screwdriver to turn each of the four fasteners 1/4 turn
counterclockwise and remove the small cover.
Caution
Remove only the small cover! A tubing diagram is located inside this
cover. Note that only the tubing connected to the aerosol chamber
drain and the condenser drains is replaceable.
6)
Remove the old drain tubing from the glass drains by carefully
using a razor blade to slit the tubing for easier removal.
14
U-5000AT Operator Manual
7)
Using 1/8" I.D. Tygon tubing, cut new tubing to the same length
as the old. To install the new tubing, moisten one end with
water and stretch that end with a tubing stretcher or needle
nose pliers. Do not stretch the tubing on the end that
attaches to the plastic tubing connectors!
Carefully push the tubing onto each glass drain until it stops. Each
piece of tubing should be pushed on at least 1/4".
Caution
Do not force the tubing, it may break the glass connectors!
9
Connect the other end of the tubing to the appropriate "T" or
tubing connector.
10)
After changing the tubing, replace the cover. Ensure that each
of the fasteners is locked in.
11)
Turn the unit right side up, replace the covers, and reconnect
all tubing and hoses.
12)
Plug in the power cord.
15
U-5000AT Operator Manual
Figure 1.
16
U-5000AT Operator Manual
Top View of the U-5000AT Ultrasonic Nebulizer (Figure 1)
A)
Lexan cover guides.
B)
Transducer RF cable.
C)
Transducer heat sink.
D)
Transducer cable connector.
E)
Chassis cable connector.
F)
Heat shield/transducer wrench.
G)
Aerosol chamber stand.
H)
Aerosol chamber.
I)
Argon carrier gas tubing.
J)
Teflon 28/15 ball/socket clamp.
K)
Aluminum heat shield support post.
L)
Glass U-tube.
M)
U-tube heat cords.
N)
Teflon U-tube support.
O)
Thermal safety switch.
P)
Teflon 18/9 ball/socket clamp.
Q)
Thermocouple wire.
R)
Thermocouple socket.
S)
Heat cord plugs.
T)
Voltage select plug.
U)
Glass sample outlet tube.
V)
Condenser box.
W)
Thermal safety switch plug.
17
U-5000AT Operator Manual
Figure 2.
18
U-5000AT Operator Manual
Front View of the U-5000AT Ultrasonic Nebulizer
(Figure 2)
A)
Transducer cable.
B)
Transducer heat sink.
C)
Transducer cooling chimney.
D)
Condenser box.
E)
Aerosol chamber stand.
F)
Glass aerosol chamber.
G)
Sample/rinse adapter.
H)
Aerosol chamber drain tubing.
I)
PEEK sample tubing.
J)
Auxiliary rinse port.
K)
Glass sample inlet tube.
L)
Teflon 28/15 ball/socket clamp.
M)
Aluminum heat shield support post.
N)
Glass U-tube.
O)
U-tube heat cords.
P)
Voltage select plug.
Q)
Teflon U-tube support.
R)
Operate switch.
S)
Power switch.
T)
Fast pump switch.
U)
Temperature controller.
V)
Aerosol chamber glass drain tube.
W)
Thermal safety switch.
19
U-5000AT Operator Manual
Figure 3.
20
U-5000AT Operator Manual
Rear View of the U-5000AT Ultrasonic Nebulizer
(Figure 3)
A)
Transistor heat sink.
B)
Transistor.
C)
RF circuit breaker.
D)
External connector.
E)
Main fuse holder.
F)
AC power cord connector.
G)
Pump speed knob.
H)
Drain pump assembly.
I)
Drain pump tubing.
J)
"T" fitting.
K)
Tygon drain tubing from U-5000AT.
L)
Tygon drain tubing to waste bottle.
M)
Argon in connector.
N)
Coolant in connector.
O)
Coolant out connector.
21
U-5000AT Operator Manual
Appendices
Appendix 1. ICP/U-5000AT Optimization Procedure
1) Recommended operating conditions and operating ranges for
aqueous sample analysis:
Normal
Condition
Range
ICP forward power
Outer gas flow rate (plasma)
1200 W
15 L/min
800-1500 W
12-20 L/min
Intermediate gas flow rate
(auxiliary)
0.5 L/min
0.0-2.0 L/min
Injector gas flow rate
(nebulizer)
0.7 L/min
0.3-1.5 L/min
Observation height
15 mm
10-20 mm
U-5000AT sample uptake rate 2.5 mL/min
1.0-3.0 mL/m
U-5000AT heating temp.
140° C
60-180° C
U-5000AT cooling temp.
5° C
0-15° C
2)
Optimization of the ICP and the USN systems may be necessary
to achieve the optimum sensitivity for specific elements in
various aqueous samples. S/B ratios or S/N ratios may be used
as the objective function for optimization procedures.
3)
For the initial start-up procedure, the recommended operating
conditions listed above may be used.
These parameters
represent compromise operating conditions for most elements
and most aqueous samples and may be used satisfactorily for
many applications. Optimum conditions may vary, depending
upon the ICP system used.
The recommended operating ranges for the ICP and the USN are also
The most sensitive operating parameters are
listed above.
injector gas flow, forward power, and observation height; these
particular parameters should be the first optimized.
Optimization of other parameters is usually not required; they are
usually preset to the nominal values listed above.
22
U-5000AT Operator Manual
5)
Simplex optimization may be used to optimize all the above
parameters simultaneously. The above ranges of operating
conditions may be used as the boundary limits of the simplex
method.
Note:
An optimization data sheet has been included on the following page.
The parameters specified are for a standard ICP torch.
Conditions will vary for instruments utilizing low gas flow torches or
for ICP/MS instruments.
23
U-5000AT Operator Manual
U-5000AT Optimization Data Sheet
Make/model USN_________________________________ Setting
Injector gas flow rate (nebulizer)
_______
Forward RF power
_______
Observation height
_______
Outer gas flow rate (plasma)
_______
Intermediate gas flow rate (auxiliary)
_______
Reflected RF power
_______
Integration time
_______
U-5000AT Heating temperature
_______
U-5000AT Cooling temperature
_______
Sample uptake rate
_______
Number of replicated measurements
__________________________________________________
_______
__________________________________________________
_______
__________________________________________________
_______
Element
Wavelength
LOD U-5000AT
______
______
______
______
______
______
______
______
______
______
______
______
______
______
______
______
_________
_________
_________
_________
_________
_________
_________
_________
_________
_________
_________
_________
_________
_________
_________
_________
____________
____________
____________
____________
____________
____________
____________
____________
____________
____________
____________
____________
____________
____________
____________
____________
Remarks
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
________________
24
U-5000AT Operator Manual
Appendix 2. Troubleshooting
Problem
Poor and / or unstable
mist generation.
Possible Cause
Readjust or cut sample inlet tubing as
described in section 3.4.
Sample uptake rate too low.
Nebulizer gas too high
Transducer face dirty.
Readjust.
Readjust.
Clean transducer face as described in
the INITIAL OPERATION section.
Replace transducer as described in the
MAINTENANCE section.
Plug power cord into AC wall outlet.
Transducer failure
Power lamp does not
illuminate. Heat
controller does not
illuminate.
Power cord not plugged into AC
wall outlet.
Main fuse blown.
Power lamp does not
illuminate/ Heat
controller DOES
illuminate.
Solution
Sample inlet tubing improperly
cut or adjusted.
Voltage select plug not installed.
Install a new main fuse as described in
the MAINTENANCE section.
Install correct voltage select plug for
either 115VAC or 230VAC.
NOTE: Install a 2.5A, 250V slo-blo
fuse if using 230VAC or a 5A, 125V
slo-blo if using 115VAC, into main
fuse holder.
Contact service representative.
Top display of heat
controller reads EEE/heat
cords do not warm up.
Thermocouple connector not
plugged into U-5000AT chassis.
Break in thermocouple wire.
Operate lamp does not
illuminate, no aerosol
present.
Water backing up into
aerosol chamber.
RF circuit breaker tripped (opens).
Reset circuit breaker as described in
the MAINTENANCE section.
Drain system not functioning
properly.
Refer to the INITIAL OPERATION
section.
Condenser drain system not
functioning properly.
Refer to INITIAL OPERATION
section.
Water in sample out transfer
tubing to ICP.
Ensure CTCS is on and set at 5°C.
Plasma flickers
excessively/ is unstable.
During operation heat
controller display stops
illuminating.
Thermal safety switch tripped due
to excessive temperature.
Contact service representative.
CAUTION: If a fuse is replaced and subsequently blows again, contact CETAC or your
authorized service representative.
Any other problems? Contact CETAC Technologies Inc. (U.S.A.) directly.
Phone: (800) 369-2822
Fax: (402) 733-5292
25
U-5000AT Operator Manual
Appendix 3. Packaging Check List
Container 1:
__Instruction manual and warranty card
__U-5000AT Ultrasonic Nebulizer (1)
__Plastic U-5000AT protective cover (1)
__Insulated coolant hoses (2)
Container 2:
__Waste bottle (1)
__U-5000AT power cord (1)
__Torch and/or spray chamber adapter
__Spare Transducer (1)
__Sample out tubing (3/16"/4.8mm I.D.) Tygon (5'/152.4mm)
__Argon in tubing (3/16"/4.8mm I.D.) Tygon (5'/152.4mm)
__Drain tubing (1/8"/3.2mm I.D.) Tygon (5'/152.4mm)
__Argon in tubing connector (1)
__Auxiliary rinse bottle with tubing.
__Peristaltic pump tubing (1.30mm I.D.) (3)
__Tefzel sample inlet tubing (0.5mm I.D.) (1)
__Extension tubing kit (union, flangeless nut (2), ferrule (2), Tefzel
tubing (3'/91.4mm))
__Replacement drain pump tubing (2)
__Spare drain pump tubing connector (4)
__Spare male luer plug (auxiliary rinse port) (1)
__Spare sample inlet tubing ferrule (1)
__Spare fuse, main power, GMC 5A, 250V, slo-blo used only for
100/115VAC operation
__Spare fuse, main power, GMC 2.5A, 250V, slo-blo used only for
230VAC operation
Container 3:
__Constant Temperature Cooling System (CTCS) (1)
__Instruction manual and warranty card
Container 4:
__Utility cart (1)
__Instruction sheet
Optional Accessories
__Acid-proof O-ring kit (resistant to concentrated acid)
__Organics tubing kit
__Auto Rinse 2000 (automatic auxiliary rinsing system)
26
U-5000AT Operator Manual
Other items needed for installation (not provided)
__5 L ethylene glycol/water mixture (or antifreeze coolant/water
mixture, 1:1 by volume)
__Sharp razor blade
__Flat blade screwdriver
__Wash bottle with deionized (DI) water
__250 mL of 0.5% (v/v) hydrofluoric acid rinse solution
__250 mL of 100 ppm yttrium check solution
__High precision peristaltic pump
27
U-5000AT Operator Manual
Appendix 4. U-5000AT AC Wiring Diagram
28
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising