100-214-294

Rev. 3

Ultrasonic Bath

Models 1800, 2800, 3800, 5800, 8800

Operator’s Manual

www.Bransonic.com
Limited Warranty

Subject to the limitations outlined below, Branson warrants that the 

Ultrasonic Baths will be free from defects in material and workmanship 

under normal use and regular service and maintenance for a period of 

twenty four (24) months from the date of shipment. Branson does not 

warrant that the operation of the software shall be uninterrupted or error 

free. THIS IS THE SOLE AND EXCLUSIVE WARRANTY GIVEN WITH 

RESPECT TO THE ULTRASONIC BATHS AND IS IN LIEU OF AND 

EXCLUDES ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, 

ARISING BY OPERATION OF LAW OR OTHERWISE, INCLUDING 

WITHOUT LIMITATION, MERCHANTABILITY AND FITNESS FOR A 

PARTICULAR PURPOSE WHETHER OR NOT THE PURPOSE OR USE 

HAS BEEN DISCLOSED TO BRANSON.

This warranty does not extend to any losses or damages due to misuse, 

accident, abuse, neglect, normal wear and tear, negligence (other than 

Branson's), unauthorized modification or alteration, use beyond rated 

capacity, unsuitable power sources or environmental conditions, improper 

installation, repair, handling, maintenance or application or any other 

cause not the fault of Branson. If within thirty (30) days after discovery of 

any warranty defects within the warranty period, the Customer notifies 

Branson thereof in writing, Branson shall, at its option and as the 

Customer's exclusive remedy, repair, correct or replace, or refund the 

purchase price for, that portion of the product found by Branson to be 

defective. Failure by the Customer to give such written notice within the 

applicable time period shall be deemed an absolute and unconditional 

waiver of the Customer's claim for such defects. The Customer must 

return the product to one of the Branson service centers, whose 

addresses are provided on page 55 of this manual. The Customer will be 

responsible for freight sending the unit to the service center. The service 

center will send the unit back to the Customer with freight prepaid.

Branson’s liability, whether based on warranty, negligence, tort or strict 

liability, or other cause, arising out of and/or incidental to sale, use or 

operation of the transducer elements, or any part thereof, shall not in any 

case exceed the cost of repair or replacement of the defective equipment, 

and such repair or replacement shall be the exclusive remedy of the 

purchaser, and in no case shall Branson be responsible for any and/or all 
consequential punitive or incidental damages including without limitation, 

and/or any consequential damages arising out of commercial losses.

• Do not place parts or containers directly on the bottom of the tank; 

use a tray or wire to suspend items. Direct placement can cause the 

units to fail.

• Do not allow the solution to drop more than 3/8 inch (1 cm) below the 

operating level line.

• Do not ever use alcohol, gasoline or flammable solutions. Doing so 

could cause a fire or explosion. Use only water-based solutions.

• Do not use mineral acids. These could damage the tank.

Contents

Front Limited Warranty

Cover

1 Safety Precautions

3 Introduction

3 Ultrasonic Baths

4 Accessories For Your Unit

4 Unpacking Your Unit

4 Installing Your Unit

5 How Ultrasonics Works

6 Model Name Definition

7 Equipment Specifications (North America Models)

8 Equipment Specifications (Europe Models)

9 Equipment Specifications (Japan Models)

10 Equipment Specifications (China Models)

11 Fuse Table (North America and Japan Models)

12 Fuse Table (Europe and China Models)

13 Operating Your Ultrasonic Bath

13 M Series: Before You Begin

14 M Series: Explanation of Controls

15 M Series: Operating your Unit

16 MH Series: Before You Begin

17 MH Series: Explanation of Controls

18 MH Series: Operating your Unit

19 CPX Series: Before You Begin

20 CPX Series: Explanation of Controls

22 CPX Series: LCD Description

23 CPX Series: Operating your Unit

25 CPXH Series: Before You Begin

26 CPXH Series: Explanation of Controls

31 CPXH Series: LCD Description

33 CPXH Series: Operating your Unit

38 Draining Your Unit

40 Optimizing Your Ultrasonic Bath

43 Application Hints

44 Cleaning Methods
44 Direct Cleaning Method

45 Indirect Cleaning Method

46 Non-Cleaning Application

47 Cleaning Solutions

51 Troubleshooting

55 Service Centers

58 Information for Users on Disposal of Equipment
1 

Before using your Ultrasonic Bath, please read and thoroughly 

understand these safety precautions. Failure to follow them may result in 

serious personal injury or property damage.

To avoid electrical shock:

• Do unplug from power source before filling or emptying the tank.

• Do plug the unit into an appropriate grounded power socket.

• Do connect the unit to a power supply using a properly sized 

overcurrent protection device. See label on the back of unit for 

information on current rating.

• Do keep the control panel and the area around the unit clean and 

dry—wipe up solution which spills over the tank brim. Water and high 

voltage can cause electrical shock.

• Do not operate the unit without proper grounding.

• Do not remove the grounding prong on the line cord plug.

• Do not disassemble your unit—high voltage inside the unit is 

dangerous.

• Do not immerse the unit in water.

To prevent personal and/or property damage:

• Do use water-based solutions.

• Do not ever use alcohol, gasoline or flammable solutions. Doing so 

could cause a fire or explosion and will void your warranty. Use only 

water-based solutions.

• Do not ever use mineral acids. These could damage the tank.

• Do not touch the stainless steel tank or cleaning solution—they may 

be hot.

• Do not allow fluid temperature to exceed 70 °C (158 °F).

• Do not place your fingers or hands into the tank while the unit is 

operating. Doing so may cause discomfort and possible skin irritation. 

Avoid contact with solutions and provide adequate ventilation.

• Do not use solutions containing chlorine bleach.

Safety Precautions
2 

To prevent damage to the unit:

• Do change your solution regularly.

• Do not cover vents on the cover.

• Do not operate the unit dry.

• Do not place parts or containers directly on the bottom of the tank; use 

a tray or wire to suspend items. Failure to comply may cause 

transducer damage and will void your warranty.

• Do not allow the solution to drop more than 3/8 inch (1 cm) below the 

operating level line with heat or ultrasonics on. Failure to comply may 

cause transducer and/or heater damage and will void your warranty.

• Turn off AC and heater switch before plugging/unplugging the line 

cord.

Sound level and energy savings

• Do not operate the unit without a cover when possible

• The sound pressure released by the unit depends on the size of the 

bath and the application, but is less than 80 dBA when used with a 

cover.

• To reduce the sound pressure it is recommended to use a cover while 

ultrasonics are activated and to switch the ultrasonics on with the bath 

loaded when possible.
3 Introduction

Introduction

Ultrasonic Baths

This line of ultrasonic baths includes five sizes:

Each model is constructed using durable industrial style 40 kHz 

transducers. These provide increased ultrasonic power along with built in 

sweep frequency to ensure uniform ultrasonic activity throughout the bath.

Models 1800 and 2800 have a molded dip in the left side of their rims to 

facilitate emptying of solution from the tank. Models 3800, 5800 and 8800 

have built in drains and are supplied with tank drain kits. Each model can 

be purchased in four different configurations:

• with a Mechanical Timer (M);

• with a Mechanical Timer plus Heat (MH);

• with Digital Control and Timer (CPX);

• with Digital Control, plus Heat and Timer (CPXH).

When you first fill your unit, or refill it with fresh solution, use warm water 

for the solution. Turn on the heater (if available), turn on the ultrasonics 

(press the Sonics key or rotate the Timer), add the cover and the solution 

will heat quickly to temperature.

Model Number Tank Capacity

1800 1/2 gal. (1.91 l)

2800 3/4 gal. (2.81 l)

3800 1-1/2 gal. (5.71 l)

5800 2-1/2 gal. (9.51 l)

8800 5-1/2 gal. (20.81 l)
4 Introduction

Accessories For Your Unit

As parts cannot be placed on the tank bottom, accessories include 

beaker positioning covers, solid and perforated insert trays, mesh 

baskets, beakers, and support racks.

NOTE: Tank covers are included with every unit.

Unpacking Your Unit

Please check your unit and its carton carefully for any external or internal 

damage. If you find damage, contact your shipping carrier immediately, 

before contacting your distributor. Please retain your packaging for future 

use.

Installing Your Unit

Check the plate on the back of the unit for correct power requirements. 

Position your unit within easy reach of a standard grounded electrical 

outlet. Do not place the unit on a circuit which could become overloaded.

If your unit does not operate correctly, first refer to the troubleshooting 

section on page 51 for possible causes, or contact an authorized service 

center listed at the end of this manual for additional information.
5 Introduction

How Ultrasonics Works

Ultrasonic sound is sound transmitted at frequencies generally beyond 

the range of human hearing. In your ultrasonic bath, ultrasonic sound 

(sonics) can be used for cleaning materials and parts, and for dissolving, 

homogenizing and degassing liquids. This is how it works:

• As the sound waves from the 

transducer radiate through the 

solution in the tank, they cause 

alternating high and low pressures 

in the solution.

• During the low pressure stage, 

millions of microscopic bubbles 

form and grow. This process is 

called CAVITATION, meaning 

“formation of cavities”.

• During the high pressure stage, 

the bubbles collapse, or “implode” 

releasing enormous amounts of 

energy.

• For ultrasonic cleaning 

applications, these implosions act 

like an army of tiny scrub brushes. 

They work in all directions, 

attacking every surface and 

invading all recesses and 

openings.

• This same energy can be used for 

other applications, such as liquid 

dissolving, homogenizations, and 

degassing.
6 Introduction

Model Name Definition

Example:

CPX 1800 H - E

Model Tank Capacity Heater Region/voltage

││ │ │

CPX: Digital 1800: 1/2 gal. 

(1.91L)

Blank: No Heater Blank: North 

America (120 VAC)

M: Mechanical 2800: 3/4 gal. 

(2.81 l)

H: With Heater - E: Europe 

(230 VAC)

3800: 1-1/2 gal. 

(5.71 l)

- J: Japan 

(100 VAC)

5800: 2-1/2 gal. 

(9.51 l)

- C: China 

(220 VAC)

8800: 5-1/2 gal. 

(20.81 l)

NOTE:

• All models have a frequency of 40 kHz.

• In CPXH models, the temperature readout accuracy is ± 3 °C 

(± 5.4 °F).

• Models available for 120 V ± 10%, 50/60 Hz and 220 V ± 10%, 

50/60 Hz operation.

• All 120 V units have CSA/UL or equivalent approval and comply with 

FCC regulations.

• All 220-230 V units meet CE standards.

• All units have a ground leakage current less than .50 ma.

• Operating temperature is from 5 °C to 40 °C (41 °F to 104 °F).
7 Introduction

Equipment Specifications (North America Models)

Model Name Tank 

Capacity

Tank 

Size 

(Inches)

Overall 

Size 

(Inches)

Weight Max 

Sonics 

Power

Heater 

Power

Max. 

Draw 

Power 

Req.

M1800

1/2 gal.

(1.91 l)

L: 6

W: 5.5

H: 4

L: 9.9

W: 12

H: 11.9

9 lb

(4 kg)

70 0 90

M1800H 70 60 150

CPX1800H 70 60 150

CPX1800 70 0 90

M2800

3/4 gal. 

(2.81 l)

L: 9.5

W: 5.5

H: 4

L: 13.3

W: 12

H: 11.9

10 lb

(4.5 kg)

110 0 130

M2800H 110 90 250

CPX2800H 110 90 250

CPX2800 110 0 130

M3800

1-1/2 

gal.

(5.71 l)

L: 11.5

W: 6

H: 6

L: 15.6

W: 12.5

H: 14.8

14 lb

(6.4 kg)

110 0 130

M3800H 110 180 350

CPX3800H 110 180 350

CPX3800 110 0 130

M5800

2-1/2 

gal. 

(9.51 l)

L: 11.5

W: 9.5

H: 6

L: 15.6

W: 15.8

H: 14.9

16 lb

(7.3 kg)

160 0 180

M5800H 160 280 490

CPX5800H 160 280 490

CPX5800 160 0 180

M8800

5-1/2 

gal.

(20.81 l)

L: 19.5

W:11.5

H: 6

L: 23.5

W: 18.3

H: 15.4

28 lb

(12.7 kg)

280 0 320

M8800H 280 560 930

CPX8800H 280 560 930

CPX8800 280 0 320
8 Introduction

Equipment Specifications (Europe Models)

Model Name Tank 

Capacity

Tank 

Size 

(mm)

Overall 

Size 

(mm)

Weight Max 

Sonics 

Power

Heater 

Power

Max. 

Draw 

Power 

Req.

M1800-E

1.91 l

(1/2 

gal.)

L: 150

W: 140

H: 100

L: 251

W: 305

H: 302

5.4 kg

(12 lb)

70 0 90

M1800H-E 70 60 150

CPX1800H-E 70 60 150

CPX1800-E 70 0 90

M2800-E

2.81 l 

(3/4 

gal.)

L: 240

W: 140

H: 100

L: 338

W: 305

H: 302

6.8 kg

(15 lb)

110 0 130

M2800H-E 110 110 250

CPX2800H-E 110 110 250

CPX2800-E 110 0 130

M3800-E

5.71 l

(1-1/2 

gal.)

L: 290

W: 150

H: 150

L: 396

W: 318

H: 376

8.2 kg

(18 lb)

110 0 130

M3800H-E 110 215 350

CPX3800H-E 110 215 350

CPX3800-E 110 0 130

M5800-E

9.51 l

(2-1/2 

gal.)

L: 290

W: 240

H: 150

L: 396

W: 401

H: 378

9.5 kg

(21 lb)

160 0 180

M5800H-E 160 300 490

CPX5800H-E 160 300 490

CPX5800-E 160 0 180

M8800-E

20.81 l

(5-1/2 

gal.)

L: 495

W:290

H: 150

L: 597

W: 465

H: 391

16.3 kg

(36 lb)

280 0 320

M8800H-E 280 600 930

CPX8800H-E 280 600 930

CPX8800-E 280 0 320
9 Introduction

Equipment Specifications (Japan Models)

Model Name Tank 

Capacity

Tank 

Size 

(Inches)

Overall 

Size 

(Inches)

Weight Max 

Sonics 

Power

Heater 

Power

Max. 

Draw 

Power 

Req.

M1800-J

1.91 l

(1/2 

gal.)

L: 150

W: 140

H: 100

L: 251

W: 305

H: 302

4 kg

(9 lb)

70 0 90

M1800H-J 70 45 135

CPX1800H-J 70 45 140

CPX1800-J 70 0 90

M2800-J

2.81 l 

(3/4 

gal.)

L: 240

W: 140

H: 100

L: 338

W: 305

H: 302

4.5 kg

(10 lb)

110 0 130

M2800H-J 110 65 205

CPX2800H-J 110 65 210

CPX2800-J 110 0 130

M3800-J

5.71 l

(1-1/2 

gal.)

L: 290

W: 150

H: 150

L: 396

W: 318

H: 376

6.4 kg

(14 lb)

110 0 130

M3800H-J 110 130 275

CPX3800H-J 110 130 280

CPX3800-J 110 0 130

M5800-J

9.51 l

(2-1/2 

gal.)

L: 290

W: 240

H: 150

L: 396

W: 401

H: 378

7.3 kg

(16 lb)

160 0 180

M5800H-J 160 200 405

CPX5800H-J 160 200 410

CPX5800-J 160 0 180

M8800-J

20.81 l

(5-1/2 

gal.)

L: 495

W:290

H: 150

L: 597

W: 465

H: 391

12.7 kg

(28 lb)

280 0 320

M8800H-J 280 400 755

CPX8800H-J 280 400 760

CPX8800-J 280 0 320
10 Introduction

Equipment Specifications (China Models)

Model Name Tank 

Capacity

Tank 

Size 

(Inches)

Overall 

Size 

(Inches)

Weight Max 

Sonics 

Power

Heater 

Power

Max. 

Draw 

Power 

Req.

M1800-C

1.91 l

(1/2 

gal.)

L: 150

W: 140

H: 100

L: 251

W: 305

H: 302

5.4 kg

(12 lb)

70 0 90

M1800H-C 70 55 145

CPX1800H-C 70 55 145

CPX1800-C 70 0 90

M2800-C

2.81 l 

(3/4 

gal.)

L: 240

W: 140

H: 100

L: 338

W: 305

H: 302

6.8 kg

(15 lb)

110 0 130

M2800H-C 110 105 250

CPX2800H-C 110 105 250

CPX2800-C 110 0 130

M3800-C

5.71 l

(1-1/2 

gal.)

L: 290

W: 150

H: 150

L: 396

W: 318

H: 376

8.2 kg

(18 lb)

110 0 130

M3800H-C 110 205 350

CPX3800H-C 110 205 350

CPX3800-C 110 0 130

M5800-C

9.51 l

(2-1/2 

gal.)

L: 290

W: 240

H: 150

L: 396

W: 401

H: 378

9.5 kg

(21 lb)

160 0 180

M5800H-C 160 285 490

CPX5800H-C 160 285 490

CPX5800-C 160 0 180

M8800-C

20.81 l

(5-1/2 

gal.)

L: 495

W:290

H: 150

L: 597

W: 465

H: 391

16.3 kg

(36 lb)

280 0 320

M8800H-C 280 560 930

CPX8800H-C 280 560 930

CPX8800-C 280 0 320
11 Introduction

Fuse Table (North America and Japan Models)

Model Name Fuse 1 Fuse 2 Fuse 3

M1800/M1800-J

250V, 2A

250V, 1.6A

250V, 1A

M1800H/M1800H-J

CPX1800H/CPX1800H-J

CPX1800/CPX1800-J 250V, 1.6A

M2800/M2800-J

M2800H/M2800H-J 250V, 2.5A

CPX2800H/CPX2800H-J

CPX2800/CPX2800-J 250V, 1.6A

M3800/M3800-J

M3800H/M3800H-J 250V, 2.5A

CPX3800H/CPX3800H-J

CPX3800/CPX3800-J 250V, 1.6A

M5800/M5800-J

M5800H/M5800H-J 250V, 5A 250V, 2A

CPX5800H/CPX5800H-J

CPX5800/CPX5800-J 250V, 2.5A 250V, 2.5A

M8800/M8800-J

250V, 10A 250V, 

3.15A

M8800H/M8800H-J

CPX8800H/CPX8800H-J

CPX8800/CPX8800-J 250V, 5A
12 Introduction

Fuse Table (Europe and China Models)

Model Name Fuse 1 Fuse 2 Fuse 3

M1800-E/M1800-C

250V, 1.6A

250V, 1.6A

250V, 1A

M1800H-E/M1800H-C

CPX1800H-E/CPX1800H-C

CPX1800-E/CPX1800-C

M2800-E/M2800-C

M2800H-E/M2800H-C 250V, 2.5A

CPX2800H-E/CPX2800H-C

CPX2800-E/CPX2800-C 250V, 1.6A

M3800-E/M3800-C

M3800H-E/M3800H-C 250V, 2.5A

CPX3800H-E/CPX3800H-C

CPX3800-E/CPX3800-C 250V, 1.6A

M5800-E/M5800-C

M5800H-E/M5800H-C 250V, 5A 250V, 2A

CPX5800H-E/CPX5800H-C

CPX5800-E/CPX5800-C 250V, 1.6A 250V, 1.6A

M8800-E/M8800-C

250V, 5A

250V, 2A

M8800H-E/M8800H-C

CPX8800H-E/CPX8800H-C

CPX8800-E/CPX8800-C 250V, 2.5A
13 Operating Your Ultrasonic Bath

Operating Your Ultrasonic Bath

If this is the first time you are using the ultrasonic bath, please read this 

whole section before operating your unit.

M Series 

Before You Begin

• Do not place parts or containers directly on the bottom of the tanks; 

use a tray or wire to suspend items. Direct placement can cause the 

units to fail.

• Do not allow the solution to drop more than 3/8 inch (1 cm) below the 

operating level line with ultrasonics on.

• Do not ever use alcohol, gasoline or flammable solutions. Doing so 

could cause a fire or explosion. Use only water-based solutions.

• Do not ever use mineral acids. These could damage the tank.

Failure to comply with these cautions will void your warranty.

Step Action

1 Select your cleaning solution (refer to page 49 for solution 

effects on metals).

2 Allowing for the volume of the parts you will be cleaning and 

leaving room for cleaning solution, fill the tank with warm tap 

water to the operating level line.

3 Add cleaning solution to the tank water.

4 Plug the unit into a grounded outlet.

5 For maximum efficiency, refer to page 40, “Optimizing Your 

Ultrasonic Bath,” before proceeding.

NOTE

If this is the first time you are running the unit, or if you have changed 

cleaning solution, you must degas the solution. If not, skip to page 15, 

“Cleaning Items (Treating Samples).”
14 Operating Your Ultrasonic Bath

M Series 

Explanation of Controls

M Series Tower

Control Function

MAIN POWER

SWITCH

This switch is located on the back of the unit, next to the 

power cord receptacle.

• Press the (on) side to power on the unit.

• Press the (off) side to power off the unit.

When operating the unit, normally leave the Main Power 

switch in the (on) position, and use the Timer Knob to 

activate ultrasonics.

TIMER KNOB Activates ultrasonics and sets time.

• Turn clockwise for timed operation (0–60 minutes).

• Turn counterclockwise to the HOLD position for 

continuous operation.

• Turn to the zero position to turn unit Off.
15 Operating Your Ultrasonic Bath

M Series 

Operating your Unit

Degassing

For initial cleaning solution degassing.

Cleaning Items (Treating Samples)

NOTE: To stop ultrasonics at any time, turn the Timer Knob to the zero 

position.

Step Action

1 Turn Main Power switch on.

2 Turn the Timer Knob clockwise to 5–10 and let the unit run to 

allow the solution to “degas.”

NOTE: Refer to page 41 for information on degassing.

Step Action

1 Turn Main Power switch on.

2 Turn the Timer Knob clockwise to set the amount of time 

(0–60 minutes) you wish the items to be cleaned.

Turn the Timer Knob counterclockwise to the HOLD position for 

continuous operation.

3 Place the items into a basket, perforated tray, or beakers in a 

positioning cover.

4 If using beakers or a solid tray, add cleaning solution to 

beakers or tray to cover the items.

5 Slowly lower the tray or beakers into the tank. Do not allow 

items to contact the tank bottom.

6 When items are clean, slowly remove them from the tank.

7 Rinse the clean items with clean water and dry them, if 

necessary.
16 Operating Your Ultrasonic Bath

MH Series 

Before You Begin

• Do not place parts or containers directly on the bottom of the tanks; 

use a tray or wire to suspend items. Direct placement can cause the 

units to fail.

• Do not allow the solution to drop more than 3/8 inch (1 cm) below the 

operating level line with heat or ultrasonics on.

• Do not ever use alcohol, gasoline or flammable solutions. Doing so 

could cause a fire or explosion. Use only water-based solutions.

• Do not ever use mineral acids. These could damage the tank.

Failure to comply with these cautions will void your warranty.

Step Action

1 Select your cleaning solution (refer to page 49 for solution 

effects on metals).

2 Allowing for the volume of the parts you will be cleaning and 

leaving room for cleaning solution, fill the tank with warm tap 

water to the operating level line.

3 Add cleaning solution to the tank water.

4 Plug the unit into a grounded outlet.

5 For maximum efficiency, refer to page 40, “Optimizing Your 

Ultrasonic Bath,” before proceeding.

NOTE

If this is the first time you are running the unit, or if you have changed 

cleaning solution, you must degas the solution. If not, skip to page 18, 

“Cleaning Items (Treating Samples).”
17 Operating Your Ultrasonic Bath

MH Series 

Explanation of Controls

MH Series Tower

Control Function

MAIN POWER

SWITCH

This switch is located on the back of the unit, next to the 

power cord receptacle.

• Press the (on) side to power on the unit.

• Press the (off) side to power off the unit.

When operating the unit, normally leave the Main Power 

switch in the (on) position, and use the Timer Knob to 

activate ultrasonics.

HEAT

SWITCH

Activates heat to 60 °C (140 °F) maximum.

NOTE: Refer to pages 40 and 40 for further information 

on temperature.

TIMER KNOB Activates ultrasonics and sets time.

• Turn clockwise for timed operation (0–60 minutes).

• Turn counterclockwise to the HOLD position for 

continuous operation.

• Turn to the zero position to turn unit Off.
18 Operating Your Ultrasonic Bath

MH Series 

Operating your Unit

Degassing

For initial cleaning solution degassing.

Cleaning Items (Treating Samples)

NOTE: To stop ultrasonics at any time, turn the Timer Knob to the zero 

position.

Step Action

1 Turn Main Power switch on.

2 Turn HEAT switch on.

3 Turn the Timer Knob clockwise to 5–10 and let the unit run to 

allow the solution to “degas.”

NOTE: Refer to page 41 for information on degassing.

Step Action

1 Turn Main Power switch on.

2 Turn the Timer Knob clockwise to set the amount of time 

(0–60 minutes) you wish the items to be cleaned.

Turn the Timer Knob counterclockwise to the HOLD position for 

continuous operation.

3 Place the items into a basket, perforated tray, or beakers in a 

positioning cover.

4 If using beakers or a solid tray, add cleaning solution to 

beakers or tray to cover the items.

5 Slowly lower the tray or beakers into the tank. Do not allow 

items to contact the tank bottom.

6 When items are clean, slowly remove them from the tank.

7 Rinse the clean items with clean water and dry them, if 

necessary.
19 Operating Your Ultrasonic Bath

CPX Series 

Before You Begin

• Do not place parts or containers directly on the bottom of the tanks; 

use a tray or wire to suspend items. Direct placement can cause the 

units to fail.

• Do not allow the solution to drop more than 3/8 inch (1 cm) below the 

operating level line with ultrasonics on.

• Do not ever use alcohol, gasoline or flammable solutions. Doing so 

could cause a fire or explosion. Use only water-based solutions.

• Do not ever use mineral acids. These could damage the tank.

Failure to comply with these cautions will void your warranty.

Step Action

1 Select your cleaning solution (refer to page 49 for solution 

effects on metals).

2 Allowing for the volume of the parts you will be cleaning and 

leaving room for cleaning solution, fill the tank with warm tap 

water to the operating level line.

3 Add cleaning solution to the tank water.

4 Plug the unit into a grounded outlet.

5 For maximum efficiency, refer to page 40, “Optimizing Your 

Ultrasonic Bath,” before proceeding.

NOTE

If this is the first time you are running the unit, or if you have changed 

cleaning solution, you must degas the solution. If not, skip to page 23, 

“Cleaning Items (Treating Samples).”
20 Operating Your Ultrasonic Bath

CPX Series 

Explanation of Controls

CPX Series Tower

Control Function

MAIN 

POWER

SWITCH

This switch is located on the back of the unit, next to the 

power cord receptacle.

• Press the (on) side to power on the unit.

• Press the (off) side to power off the unit.

When operating the unit, normally leave the Main Power 

switch in the (on) position, and use the On/Standby key to 

switch between the operating state and standby state.

ON/

STANDBY

When the Main Power switch on the rear panel is in the 

(on) position, press to power on/off the unit.

UP/DOWN

KEYS

Press to increase/decrease ultrasonic or degassing cycle 

time (hold for quick increments/decrements).

Time values are circular, pressing from 99 minutes takes 

you to Constant Sonics Mode ( and “- -” on the display) 

and then to 1 minutes. Pressing from 1 minutes takes 

you to Constant Sonics Mode and then to 99 minutes.

During power-up, use to select high or low ultrasonic power 

output.

Continued...
21 Operating Your Ultrasonic Bath

SONICS Press to activate ultrasonics. If running in Timed Mode, a 

timer will begin to count down and ultrasonics will stop at 

0 minutes. In Constant Sonics Mode ( and “- -” on the 

display), timer has no function.

Press key again to deactivate ultrasonics.

If running in Timed Mode, press and keys to adjust 

the ultrasonic cycle time (adjustable from 1 to 99 minutes).

DEGAS Press to degas the solution or to run a degas application. A 

default timer of 5 minutes will begin to count down and 

degassing will stop at 0 minutes.

Press key again to stop degassing the solution.

During a degas cycle, press and keys to adjust the 

degas cycle time (adjustable from 1 to 99 minutes).

NOTE: Refer to page 41 for information on degassing.

Control Function
22 Operating Your Ultrasonic Bath

CPX Series 

LCD Description

Item Function

Power 

Level

Displayed for 15 s only during power-up, shows the current 

ultrasonic output power selection.

Press the Sonics ( ) or Degas key ( ) to go into normal 

operating mode.

Press or key to change between high (HI) and low 

(LO) power ultrasonics.

Sonics/

Degas

Timer

Displays the duration of a timed ultrasonic or degas cycle.

Press and keys to adjust ultrasonic or degassing 

cycle time (adjustable from 1 to 99 minutes).

In Constant Sonics Mode, “- -” is displayed.

Constant 

Sonics

Indicates the unit is operating in Constant Sonics Mode.

In Constant Sonics Mode, sonics will remain on until the 

Sonics key is pressed or the unit is turned off.

Sonics On Indicates sonics are active.

If running in Timed Mode, ultrasonics will remain on until the 

timer reaches 0 minutes.

In Constant Sonics Mode, ultrasonics will remain on until the 

Sonics key is pressed or the unit is turned off.

Degas On Indicates the unit is in Degas Mode.

In Degas Mode, degassing will continue until the timer 

reaches 0 minutes.

NOTE: Refer to page 41 for information on degassing.

Alarm Alarm Bell icon flashes when the unit encounters an 

abnormal operating condition.

NOTE: Refer to page 51 for information on troubleshooting.
23 Operating Your Ultrasonic Bath

CPX Series 

Operating your Unit

Degassing

For initial cleaning solution degassing.

NOTE: To stop degassing at any time, press the Degas key ( ).

Cleaning Items (Treating Samples) 

NOTE: To stop ultrasonics at any time, press the Sonics key ( ).

Step Action

1 Turn Main Power switch on.

2 Press the On/Standby key ( ) to turn on the unit.

3 Press Degas key ( ) once to start the degas process.

Default degas time is 5 minutes.

If necessary, use / keys to alter degas time during a 

degas cycle.

NOTE: Refer to page 41 for information on degassing.

4 After completing the degas time, you are ready to set operating 

parameters.

Step Action

1 Turn Main Power switch on.

2 Press the On/Standby key ( ) to turn on the unit.

3 Set the amount of time you wish the items to be cleaned, or 

select Constant Sonics Mode:

• Use / keys to increase/decrease cycle time (hold for 

quick increments/decrements).

• Pressing key from 99 minutes or from 1 minutes 

takes you to Constant Sonics Mode ( and “- -” on the 

display).

Continued...
24 Operating Your Ultrasonic Bath

4 Press the Sonics key ( ) to activate ultrasonics.

5 Place the items into a basket, perforated tray, or beakers in a 

positioning cover.

6 If using beakers or a solid tray, add cleaning solution to 

beakers or tray to cover the items.

7 Slowly lower the tray or beakers into the tank. Do not allow 

items to contact the tank bottom.

8 When items are clean, slowly remove them from the tank.

9 Rinse clean items with clean, warm water and dry, if 

necessary.

Step Action
25 Operating Your Ultrasonic Bath

CPXH Series 

Before You Begin

• Do not place parts or containers directly on the bottom of the tanks; 

use a tray or wire to suspend items. Direct placement can cause the 

units to fail.

• Do not allow the solution to drop more than 3/8 inch (1 cm) below the 

operating level line with heat or ultrasonics on.

• Do not ever use alcohol, gasoline or flammable solutions. Doing so 

could cause a fire or explosion. Use only water-based solutions.

• Do not ever use mineral acids. These could damage the tank.

Failure to comply with these cautions will void your warranty.

Step Action

1 Select your cleaning solution (refer to page 49 for solution 

effects on metals).

2 Allowing for the volume of the parts you will be cleaning and 

leaving room for cleaning solution, fill the tank with warm tap 

water to the operating level line.

3 Add cleaning solution to the tank water.

4 Plug the unit into a grounded outlet.

5 For maximum efficiency, refer to page 40, “Optimizing Your 

Ultrasonic Bath,” before proceeding.

NOTE

If this is the first time you are running the unit, or if you have changed 

cleaning solution, you must degas the solution. If not, skip to page 34, 

“Cleaning Items (Treating Samples) in Timed Sonics Mode.”
26 Operating Your Ultrasonic Bath

CPXH Series 

Explanation of Controls

CPXH Series Tower

Control Function

MAIN 

POWER

SWITCH

This switch is located on the back of the unit, next to the 

power cord receptacle.

• Press the (on) side to power on the unit.

• Press the (off) side to power off the unit.

When operating the unit, normally leave the Main Power 

switch in the (on) position, and use the On/Standby key to 

switch between the operating state and standby state.

ON/

STANDBY

When the Main Power switch on the rear panel is in the 

(on) position, press to power on/off the unit.

UP/DOWN

KEYS

Press to increase/decrease ultrasonic or degassing cycle 

time (hold for quick increments/decrements).

Time values are circular, pressing from 99 minutes takes 

you to 1 minutes. Pressing from 1 minutes takes you to 

99 minutes.

If the Fn key was pressed, use the / keys to adjust 

function settings.

Continued...
27 Operating Your Ultrasonic Bath

HEAT Press to turn heater on/off.

Heater will shut off when set temperature is attained.

SONICS Press to activate ultrasonics. If running in Timed Mode, a 

timer will begin to count down and ultrasonics will stop at 

0 minutes. In Constant Sonics Mode ( and “- - -” on the 

display), timer has no function.

Press key again to deactivate ultrasonics.

If running in Timed Mode, press and keys to adjust 

the ultrasonic cycle time (adjustable from 1 to 99 minutes).

DEGAS Press to degas the solution or to run a degas application. 

The degas timer will begin to count down from its current 

setting and degassing will stop at 0 minutes.

Press key again to stop degassing the solution.

During a degas cycle, press and keys to adjust degas 

time (adjustable from 1 to 99 minutes).

NOTE: Refer to page 41 for information on degassing.

AUTO Press to begin an auto cycle. In Auto Mode, the following 

actions are carried out automatically by the controller:

• Heater is turned on to bring bath to set temperature.

• When set temperature is reached, ultrasonics are 

activated. The unit will abort the auto cycle and flash the 

 icon if set temperature is not reached within a 

120-minute period.

• When ultrasonics timer reaches 0 minutes, the auto cycle 

is finished.

If at any point during an auto cycle the degas key is pressed, 

a degas cycle will begin. If ultrasonics has already started, 

the ultrasonics timer will restart after the degas period.

Continued...

Control Function
28 Operating Your Ultrasonic Bath

FUNCTION Press the Fn key to access less-frequently used functions. 

The appropriate icon will flash to indicate which option is 

selected. 

If no key is pressed after 15 seconds the unit will save any 

changes and return to the Ready state.

Press the Fn key again after making any changes to scroll 

through the rest of the options and return to the Ready state.

The following options are available:

• Set Temperature: Press and keys to increase/ 

decrease the bath set temperature.

Continued...

Control Function

Ready

State

Set Degas

Time Set Target

Temp.

Set Constant

Sonics

Set Power 

Level

Sel. Temp.

Units

Fn 6x

Fn 4x

Fn 5x

Fn 3x

Fn 2x

Fn 1x

(Set Sonics Time)

(1x) Indicates

Blinking
29 Operating Your Ultrasonic Bath

FUNCTION • Timed/Constant Sonics: Press key to select 

Constant Sonics Mode ( and “- - -” on the display). 

Press key to select Timed Sonics Mode.

• Full/Low Power: Press key to select full power 

ultrasonic output. Press key to select low power 

ultrasonic output.

• Temperature Units: Press key to select Fahrenheit 

(°F). Press key to select Celsius (°C).

Continued...

Control Function

(2x) Indicates

Blinking

(3x) Indicates

Blinking

(4x) Indicates

Blinking
30 Operating Your Ultrasonic Bath

FUNCTION • Degas Time: Press / keys to increase/decrease 

degas time (hold for quick increments/decrements). 

Time values are circular, pressing from 99 minutes 

takes you to 1 minutes. Pressing from 1 minutes 

takes you to 99 minutes.

Control Function

(5x) Indicates

Blinking
31 Operating Your Ultrasonic Bath

CPXH Series 

LCD Description

Item Function

Sonics/

Degas

Set Time

Displays the set time for a timed ultrasonic or degas cycle.

Press and keys to adjust ultrasonic or degassing 

cycle time (adjustable from 1 to 99 minutes).

In Constant Sonics Mode, “- - -” is displayed.

Set 

Temperature

Displays the target temperature.

Temperature units are indicated by the °F (for Fahrenheit) 

or °C (for Celsius) right of the Current Temperature icon.

Current 

Temperature

Displays the current tank temperature as measured by the 

unit.

Temperature units are indicated right of the icon as either 

°F (For Fahrenheit) or °C (for Celsius). Units can be 

switched using the Fn key. See Fn key description on 

page 29.

Sonics/

Degas

Timer

Displays the remaining time of a running timed ultrasonic 

or degas cycle.

Press and keys to adjust ultrasonic or degassing 

cycle time (adjustable from 1 to 99 minutes).

Continued...
32 Operating Your Ultrasonic Bath

Auto Indicates the unit is in Auto Mode. In Auto Mode, the 

following actions are carried out automatically by the 

controller:

• Heater is turned on to bring bath to set temperature.

• When set temperature is reached, ultrasonics are 

activated. The unit will abort the auto cycle and flash 

the icon if set temperature is not reached within 

a 120-minute period.

• When ultrasonics timer reaches 0 minutes, the auto 

cycle is finished.

If at any point during an auto cycle the degas key is 

pressed, a degas cycle will begin. If ultrasonics has 

already started, the ultrasonics timer will restart after the 

degas period.

Constant 

Sonics

Indicates the unit is operating in Constant Sonics Mode. In 

Constant Sonics Mode, ultrasonics will remain on until the 

Sonics key is pressed or the unit is turned off.

Heat Indicates the heater is on. Heater will shut off when set 

temperature is attained.

Sonics On Indicates sonics are active.

If running in Timed Mode, ultrasonics will remain on until 

the timer reaches 0 minutes.

In Constant Sonics Mode, ultrasonics will remain on until 

the Sonics key is pressed or the unit is turned off.

Degas On Indicates the unit is in Degas Mode.

In Degas Mode, degassing will continue until the timer 

reaches 0 minutes.

NOTE: Refer to page 41 for information on degassing.

Power

Level

Indicates the ultrasonic power output selection:

• Four bars indicate high power ultrasonics.

• Two bars indicate low power ultrasonics.

Alarm Alarm Bell icon flashes when the unit encounters an 

abnormal operating condition.

NOTE: Refer to page 51 for information on 

troubleshooting.

Item Function
33 Operating Your Ultrasonic Bath

CPXH Series 

Operating your Unit

Degassing

For initial cleaning solution degassing.

NOTE: To stop degassing at any time, press the Degas key ( ).

Ultrasonic Operating Modes

Step Action

1 Turn Main Power switch on.

2 Press the On/Standby key ( ) to turn on the unit.

3 Default degas time is 5 minutes.

To change the degas time, press the Fn key until the Degas 

icon ( ) appears and the Set Time icon ( ) flashes. Then 

press the / keys to change the degas time.

4 Press Degas key ( ) once to start the degas process.

If necessary, use / keys to alter degas time during a 

degas cycle.

NOTE: Refer to page 41 for information on degassing.

5 After completing the degas time, you are ready to set operating 

parameters.

Mode Action

Timed 

Sonics

In Timed Sonics Mode, a timer will begin to count down and 

ultrasonics will remain on until the timer reaches 0 minutes.

For instructions on operating in Timed Sonics Mode, see 

page 34.

Constant 

Sonics

In Constant Sonics Mode ultrasonics will remain on until the 

Sonics key is pressed or power is turned off to the unit.

For instructions on operating in Constant Sonics Mode, see 

page 35.

Auto In Auto mode ultrasonics will start once set temperature is 

attained. Ultrasonics will remain on until the timer reaches 

0 minutes.

For instructions on operating in Auto Mode, see page 36.
34 Operating Your Ultrasonic Bath

Cleaning Items (Treating Samples) in Timed Sonics Mode

NOTE: To stop ultrasonics at any time, press the Sonics key ( ).

Step Action

1 Turn Main Power switch on.

2 Press the On/Standby key ( ) to turn on the unit.

3 If necessary degas the liquid. See page 33 for instructions.

4 Set the amount of time you wish the items to be cleaned:

• Use / keys to increase/decrease cycle time (hold for 

quick increments/decrements).

5 Set the tank temperature:

• Press the Fn key until the Set Temperature icon ( ) 

flashes. 

• Press the / keys to alter the setting to the tank 

temperature you wish to reach.

• Press the HEAT key ( ) once to activate heat. The Heat 

icon ( ) appears.

NOTE: Units can be switched between °F or °C using the Fn 

key. See Fn key description on page 29.

6 Set the ultrasonic power level:

• Press the Fn key until the Power Level icon ( ) flashes.

• Press the key to select high power ultrasonics or press 

the key to select low power ultrasonics.

7 Press the Sonics key ( ) to activate ultrasonics.

8 Place the items into a basket, perforated tray, or beakers in a 

positioning cover.

9 If using beakers or a solid tray, add cleaning solution to 

beakers or tray to cover the items.

10 Slowly lower the tray or beakers into the tank. Do not allow 

items to contact the tank bottom.

11 When items are clean, slowly remove them from the tank.

12 Rinse clean items with clean, warm water and dry, if 

necessary.
35 Operating Your Ultrasonic Bath

Cleaning Items (Treating Samples) in Constant Sonics Mode

NOTE: To stop ultrasonics at any time, press the Sonics key ( ).

Step Action

1 Turn Main Power switch on.

2 Press the On/Standby key ( ) to turn on the unit.

3 If necessary degas the liquid. See page 33 for instructions.

4 Change sonics mode:

• Press the Fn key until the Constant Sonics icon ( ) and 

the Set Time icon ( ) flash. 

• Press the key to select Constant Sonics Mode.

5 Set the tank temperature:

• Press the Fn key until the Set Temperature icon ( ) 

flashes. 

• Press the / keys to alter the setting to the tank 

temperature you wish to reach.

• Press the HEAT key ( ) once to activate heat. The Heat 

icon ( ) appears.

NOTE: Units can be switched between °F or °C using the Fn 

key. See Fn key description on page 29.

6 Set the ultrasonic power level:

• Press the Fn key until the Power Level icon ( ) flashes.

• Press the key to select high power ultrasonics or press 

the key to select low power ultrasonics.

7 Press the Sonics key ( ) to activate ultrasonics.

8 Place the items into a basket, perforated tray, or beakers in a 

positioning cover.

9 If using beakers or a solid tray, add cleaning solution to 

beakers or tray to cover the items.

10 Slowly lower the tray or beakers into the tank. Do not allow 

items to contact the tank bottom.

11 When items are clean, slowly remove them from the tank.

12 Rinse clean items with clean, warm water and dry, if 

necessary.
36 Operating Your Ultrasonic Bath

Cleaning Items (Treating Samples) in Auto Mode

NOTE: To stop ultrasonics at any time, press the Sonics key ( ).

Step Action

1 Turn Main Power switch on.

2 Press the On/Standby key ( ) to turn on the unit.

3 If necessary degas the liquid. See page 33 for instructions.

4 Set the amount of time you wish the items to be cleaned:

• Use / keys to increase/decrease cycle time (hold for 

quick increments/decrements).

5 Set the tank temperature:

• Press the Fn key until the Set Temperature icon ( ) 

flashes.

• Press the / keys to alter the setting to the tank 

temperature you wish to reach.

• Press the HEAT key ( ) once to activate heat. The Heat 

icon ( ) appears.

NOTE: Units can be switched between °F or °C using the Fn 

key. See Fn key description on page 29.

6 Set the ultrasonic power level:

• Press the Fn key until the Power Level icon ( ) flashes.

• Press the key to select high power ultrasonics or press 

the key to select low power ultrasonics.

7 Press the Auto key ( ) to begin Auto Cycle. Heater will turn 

on and sonics will start once set temperature is attained.

8 Place the items into a basket, perforated tray, or beakers in a 

positioning cover.

9 If using beakers or a solid tray, add cleaning solution to 

beakers or tray to cover the items.

10 Slowly lower the tray or beakers into the tank. Do not allow 

items to contact the tank bottom.

11 When items are clean, slowly remove them from the tank.

12 Rinse clean items with clean, warm water and dry, if 

necessary.
37 Operating Your Ultrasonic Bath

CPXH Temperature Calibration

The CPXH unit temperature measurement is factory calibrated. Use the 

following instructions to perform periodic calibrations:

Step Action

1 The ultrasonic bath liquid may be at room temperature or may 

be heated-up to a desired operating temperature (e.g. 40 °C).

2 Press the Fn key 4 times until the Current Temperature icon 

( ) starts blinking. Press the key to select °F. Press the 

Fn key 2 more times to return to the Ready State.

3 Press the On/Standby key ( ) to turn off the unit.

4 Simultaneously, press both the On/Standby ( ) and the Fn 

key. Only the bottom left digits and the Current Temperature 

icon ( ) should turn on. 

5 Stir the solution for 15 seconds to ensure thermal uniformity.

6 Wait 2 minutes after turning the unit on before taking 

measurements. This allows for the display to be properly 

updated.

7 Use the / keys to change the display temperature to 

match the actual tank temperature.

8 Press the On/Standby key ( ) to end calibration.
38 Operating Your Ultrasonic Bath

Draining Your Unit

Models 1800 and 2800 do not have a drain. To empty, use the indented 

side of the rim to pour the used solution into a waste disposal unit, rinse 

the tank thoroughly and refill with new solution.

Models 3800, 5800, and 8800 include a drain and valve kit.

Do not immerse the unit in water.

Unplug the unit from the power source.

Step Action

1 Place the unit to allow easy reach of the drain tube into a waste disposal unit.

2 Remove the thread protecting cap from the end of the unit’s drain pipe. This will 

expose the white teflon sealing tape on the drain pipe’s threads.

Continued...
39 Operating Your Ultrasonic Bath

3 Hand tighten the drain valve onto the drain pipe over the white teflon sealing 

tape. Finish tightening the valve in place using an adjustable or a 21mm 

wrench. Tighten the valve no more than one full turn when using the wrench 

until the handle is on top.

CAUTION: Over tightening of the valve can cause damage to the ultrasonic 

tank. Always use teflon sealing tape or a sealing paste designed for use with 

stainless steel if retightening or refitting of the drain valve is required.

4 Hand tighten the hose adaptor into the end of the drain valve. Slide the drain 

tube over the barbed hose adaptor end.

5 Close the drain valve by turning the handle perpendicular to the valve body and 

the unit is ready to fill with solution. To open the valve and drain the tank, turn 

the handle so that it is in line with the valve body.

Step Action

Protective Cap

Hose

Adaptor

Drain Tube

Valve

Assembled Drain
40 Operating Your Ultrasonic Bath

Optimizing Your Ultrasonic Bath

Tanks

Cleaning - check the tank for contamination whenever you change 

solution. If necessary, remove contaminants with a nonabrasive cloth and 

water.

Emptying - always unplug the unit before emptying the tank. Empty the 

solution into a waste disposal unit.

Filling - always unplug the line cord before filling the tank. Fill the tank to 

the operating level (with beaker/tray in place), using warm tap water.

Low solution level - will cause the unit to fail. When you remove heavy 

or bulky loads from the tank, the solution level may drop below the 

operating level. If so, be sure to replace lost solution and degas, if 

necessary, depending on the amount used.

Overload - do not rest any items on the tank bottom. Weight on the tank 

bottom dampens sound energy and will cause damage to the transducer. 

Instead, use a tray and/or beaker positioning cover to support all items. 

Allow at least 1 inch (2.5 cm) between the tank bottom and the beaker or 

receptacle for adequate cavitation.

Covers - allow the unit to heat up faster, to a higher temperature, and 

avoid excessive liquid evaporation. However, obstructing the cover vents 

will cause the unit to overheat.

Temperature

Heater - the heater may cause some discoloration of the tank wall. This is 

normal and will not affect the performance of the unit.

Solution - the fastest method to heat your ultrasonic bath is to fill with 

warm solution, use heat, ultrasonics (which also adds heat), and a cover.

Over temperature protection (CPXH only) - the unit will shut down at 

75 °C (167 °F) and display will go blank with only the Alarm icon 

remaining on. Turn the unit off and allow it to cool down. For a faster 

cooldown, replace some of the warm solution with cold solution.
41 Operating Your Ultrasonic Bath

Solution Temperature Measurement

The following instructions provide an accurate method to obtain 

consistent thermal measurements using a calibrated temperature 

measurement instrument. These readings can be used for cleaning 

process control or to verify the accuracy of the CPXH temperature 

readings.

Solution

Solution activity - the amount of visible activity is not necessarily related 

to optimum cavitation for cleaning.

Degassing 1 - fresh solutions contain many dissolved gases (usually air), 

which reduce effective ultrasonic action. Although solutions will naturally 

degas over time, using Degas Mode speeds up the degassing process. 

Solutions that have been sitting unused for 24 hours or longer have 

reabsorbed some gases.

Degassing 2 -degassing mode is also used where gas has to be 

removed from liquids or samples.

Heat - increases the chemical activity of cleaning solutions.

Solvents - never use solvents. Vapors of flammable solutions will collect 

under the unit, where ignition is possible from electrical components.

Surface tension - can be reduced by adding solution to the bath. 

Reduced surface tension will increase cavitation intensity and enhance 

cleaning.

Step Action

1 Ensure that sonics and heaters are off.

2 Stir the solution for 15 seconds to ensure thermal uniformity.

3 For CPXH models, wait 2 minutes after turning the unit on 

before taking measurements. This allows for the display to be 

properly updated.

4 Suspend a thermocouple in the bath without allowing the probe 

to touch the tank walls.
42 Operating Your Ultrasonic Bath

Renewal - replace cleaning solutions often to increase ultrasonic cleaning 

activity. Solutions, as with most chemicals, will become depleted over 

time. Solutions can become contaminated with suspended soil particles 

which coat the tank bottom, inhibiting ultrasonic activity.
43 Operating Your Ultrasonic Bath

Application Hints

First time cleaning - first experiment with one piece, then proceed with 

the remainder.

Solution level - Be sure to maintain solution level within 1/2 inch (1.3 cm) 

of the tank’s “operating level” line. Surface activity can vary with liquid 

level.

Load size - It is faster and more efficient to run several small loads rather 

than a few big loads.

Placing items - Never allow items to sit on the bottom of the tank. Always 

place them in a tray or beaker or suspend in the solution.

Rinsing items - After cleaning, use a clean water bath to rinse away 

chemicals adhering to items.

Lubricating items - When necessary, re-lubricate items immediately 

after cleaning.

Drying items - Air drying at room temperature works for some items. 

Place parts requiring faster drying time under hot air blowers or in ovens.

Please call your local distributor if you have application questions.

• Never clean novelty or inexpensive jewelry in the ultrasonic bath. 

The combination of heat and vibration may loosen a cement-held 

setting.

• Never clean gemstones such as emerald, amethyst, pearl, opal, 

coral, turquoise, peridot or lapis lazuli in the ultrasonic bath.
44 Operating Your Ultrasonic Bath

Cleaning Methods

There are two methods of cleaning - direct and indirect. Each has 

advantages and disadvantages. When in doubt, run test samples using 

both methods to decide which one produces the best results for you.

Direct Cleaning Method

How it works:

• Fill the tank with warm water and a cleaning solution.

• Place the items to be cleaned in a perforated tray and lower them into 

the tank. You can also suspend items on a wire and then immerse 

them in the solution.

The advantages of this method are the simplicity of operation and 

cleaning effectiveness.

ITEMS IN PERFORATED

INSERT TRAY

ITEM

SUSPENDED
45 Operating Your Ultrasonic Bath

Indirect Cleaning Method

How it works:

• Fill the tank with warm water and a cleaning solution. The tank can be 

filled with any amount of diluted solution as long as it reaches the 

water level line once the items to be cleaned and accessories are 

placed into the tank.

• Pour your solution medium into one or more beakers or into a solid 

insert tray.

• Place the beakers in a beaker positioning cover or a solid insert tray to 

fit your unit. Beakers should not touch the tank’s bottom.

The advantages of this method are:

• Removed soil stays in the beaker or tray so you can easily examine, 

filter or discard it.

• You can use one or more solutions at the same time.

- two completely different cleaning solutions.

- one beaker or tray with a cleaning solution and one with a rinse 

solution.

• Cleaning solution in your tank needs to be changed less often.

SOLID INSERT TRAY

BEAKER POSITIONING COVER

BEAKERS
46 Operating Your Ultrasonic Bath

Non-Cleaning Application

This method can be used for sample preparation, which includes 

degassing liquids, mixing, homogenization, dissolving solids, cell lysing 

and dispersion of particles.

How it works:

• Fill the tank with water and wetting agent. The tray or beakers can be 

filled with any amount of solution as long as the water in the tank 

outside the tray or beakers reaches the water level line.

• Place the beakers in a beaker positioning cover, an insert tray or an 

insert basket to fit your unit, or place the beakers and flasks onto a 

Branson support rack. Beakers should not touch the tank’s bottom.

INSERT TRAY

BEAKER POSITIONING COVER

BEAKERS
47 Operating Your Ultrasonic Bath

Cleaning Solutions

Solution Types

Water-based solutions can be either slightly acidic or alkaline. They 

include detergents, soaps and industrial cleaners designed to remove 

specific soils.

Acidic water-based solutions: remove rust, tarnish or scale. They 

range from mild solutions that remove tarnish, to concentrated, inhibited 

acidic solutions that remove investment plaster, milk-stone, zinc oxide 

and rust from steel and cast iron as well as smut and heat-treat scale from 

hardened steel.

Alkaline water-based solutions: include carbonates, silicates and 

caustics. These cause emulsifying action, which keeps soil from 

redepositing on the cleaned surface, and improves cleaning action in hard 

water.

Do not use alcohol, gasoline, bleach, mineral acids, solutions with a 

flash point, semi-aqueous or combustible liquids in ultrasonic tanks, or 

you will void the warranty. Only use non-flammable solutions and waterbased solutions.

Alkaline strength Removes

Mild Light oils and greases, cutting oils and coolant 

compounds.

Mild to strong Heavy grease and oil, waxes, vegetable oils, inks, 

wax or fat-base buffing and polishing compounds, 

milk residues and carbohydrates.

Heavy-duty Mill scale, heat-treat scale, corrosion or oxides.
48 Operating Your Ultrasonic Bath

Change the cleaning solution periodically. Cleaning solutions can become 

contaminated with suspended soil particles which coat the tank bottom. 

This coating dampens the ultrasonic action and reduces cleaning 

efficiency. Certain solutions will cavitate better than others. Contact your 

local distributor for further information.

Heat and cavitation increase the chemical activity of cleaning solutions. 

Some materials may be damaged by this stronger chemical action. When 

in doubt, test run samples of items to be cleaned.

Caustic solutions: used to remove rust from steels, metal alloy corrosion 

and a variety of tenacious soils.

Solution Amounts

Solution amounts may vary. The amount you use depends on the 

detergent and the type of soil to be removed. Follow instructions on the 

solution container and refer to the table below for the effects of solutions 

on metals.

Chemicals Harmful to Your Tank

The following chemicals will harm your ultrasonic tank and the action of 

ultrasonics and higher operating temperatures will increase their chemical 

activity. Do not use these or similar chemicals directly or in dilution in your 

ultrasonic tank or you will void your warranty.

Acetophenone Chloracetic Acid Hydrocyanic Acid

Aluminum Chloride Chloric Acid Hydrofluoric Acid

Aluminum Fluoride Chlorine, Anhydrous Hydrofluosilicic Acid

Aluminum Sulphate Chromic Acid Iodoform

Ammonium Bifluoride Copper Chloride Mercuric Chloride

Ammonium Chloride Copper Fluoborate Muriatic Acid

Ammonium Hydroxide Ethyl Chloride Phosphoric (crude)

Amyl Chloride Ferric Chloride Sodium Hypochlorite

Antimony Trichloride Ferrous Chloride Potassium Chloride

Aqua Regia Ferris Sulfate Stannic Chloride

Bromine Fluoboric Acid Stannous Chloride

Calcium Bisulfate Fluorine Sulfur chloride

Calcium Bisulfite Hydrobromic Acid Sulfuric Acid

Calcium Hypochloride Hydrochloric Acid Zinc Chloride
49 Operating Your Ultrasonic Bath

Solution Effects on Metals

(1) = Alkaline; (2) = Acidic; and (3) = Caustic.

Cleaning 

Agent*

*. Contact Distributor for Cleaning Agent availability outside the US.

Steel Brass AluminumMagnesiumZinc S. Steel 

Copper

Tin

Optical (1) none none none none**

**.No effect if solution temperature is less than 60 °C (140 °F).

none** none none**

Jewelry (1) none none none none none none none

Buffing (1) 

compound

none slight 

stain

none none attacks none none

Oxide (2) 

remover

slight etch none slight 

attack

attacks attacks none none

Electronic 

cleaner (1)

none none slight 

attack

none none none none

General(1) 

purpose

none none slight 

attack

none none none none

Industrial 

strength(1)

none none slight 

attack

none none none none

Metal (1) 

cleaner 1

none none none none none none none

Metal (1) 

cleaner 2

none none slight 

attack

none none none none

Metal (1) 

cleaner 3

none none none none none none none

Liquid Rust 

(3) stripper

none none attacks*** attacks*** attacks none slight 

attack

GP (1) 

Powder

none none none none none none none

*** Free hydrogen may be released if solution comes in contact 

with reactive metals
50 Operating Your Ultrasonic Bath
51 Troubleshooting

Troubleshooting

If your unit does not operate satisfactorily, please check the tables below 

for possible causes before calling your authorized service center.

High voltage inside - dangerous shock hazard.

DO NOT attempt to disassemble or repair the unit.

Problem Cause What to do

Unit will not 

start.

Unit not plugged in properly.

M/MH - Mechanical timer not 

ON.

CPX/CPXH - POWER switch 

not ON.

CPX/CPXH - On/Standby 

key malfunctioning.

Blown fuse.

Plug into functioning 

electrical outlet.

Turn timer clockwise.

Press power switch ON.

Call nearest authorized 

service center.

Call nearest authorized 

service center.

Unit operates 

but does not 

heat solution

Heater malfunctions.

MH - HEAT not ON.

CPXH - HEAT not set 

properly.

CPXH - membrane 

malfunctioning.

Call nearest authorized 

service center.

Turn heat ON

See “Operating your Unit” on 

page 33.

Call nearest authorized 

service center.

Clogged drain Clogged drain. Call nearest authorized 

service center.

GFI protected 

outlet trips

Units may cause GFI circuit 

trips.

Connect unit to an 

unprotected outlet.

Unit operates 

but does not 

reach set 

temperature

Malfunctioning heater or 

sensor components.

Call nearest authorized 

service center.

Continued...
52 Troubleshooting

High voltage inside - dangerous shock hazard.

DO NOT attempt to disassemble or repair the unit.

Problem Cause What to do

Err on actual 

temp and 

alarm Icon is 

on. Sonics 

and degas 

operate. Auto 

and Heat are 

inactive.

Malfunctioning sensor 

components.

Call nearest authorized 

service center.

Unit operates 

but display 

does not 

function.

CPX/CPXH - Control board 

malfunctioning.

Call nearest authorized 

service center.

Unit stops 

operating and 

display is 

blank with 

only alarm 

icon on.

Overheat condition. Turn unit off. Allow unit to 

cool, check solution level, 

then restart. Refer to page 40 

for information on over 

temperature protection.

Decreased 

ultrasonic 

activity.

NOTE: Refer 

to page 53 for 

cavitation 

check.

Solution is not degassed.

Solution is spent.

Solution level is incorrect for 

load.

Tank bottom is covered with 

soil particles.

Using deionized water in the 

tank.

Make sure that tank was 

filled with warm tap water 

plus cleaning solution and 

has run 5–10 minutes.

Change solution.

Adjust solution to within 3/8 

inch (1 cm) of the tank’s 

operating level line with load.

Empty, then clean tank with 

warm water. Wipe with a 

nonabrasive cloth.

Deionized water does not 

cavitate as actively as soapy 

tap water.
53 Troubleshooting

Glass Slide Test

Check your ultrasonic bath periodically to test the level of activity of the 

ultrasonic cavitation. Frequency of testing will depend on your use of the 

unit, however, Branson suggests running this test monthly.

You will need the following equipment:

• Frosted microscope glass slide (1” x 3”), such as Fisherbrand®1

#12-550-343 frosted microscope slides, or equivalent;

• No. 2 lead pencil; and

• General purpose household cleaning solution, such as Dawn®2 liquid 

soap.

Test procedure:

1. Prepare a fresh solution with general purpose household cleaning 

solution (concentration 1%) and warm tap water 49 °C – 60 °C 

(120 °F – 140 °F).

2. Fill the tank to within 3/8 inch (1 cm) of the “operating level” line.

3. Turn the ultrasonics on for at least five to ten minutes to allow for 

degassing.

4. Prepare the glass slide by first wetting the frosted portion with tap 

water.

1. Fisherbrand is a registered trademark of Fisher Scientific Company.

2. Dawn is a registered trademark of Procter & Gamble Company 

U.S.A.

GLASS SLIDE PENCILED “X”

FROSTED END
54 Troubleshooting

5. With the No. 2 pencil, on the frosted portion make an “X” from corner 

to corner.

6. Immerse the frosted end of the slide into the solution. Hold the slide 

vertically and center it in the solution.

7. Make sure that model CPX/CPHX models are in Timed or Constant 

Sonics Mode, not Degas Mode, then turn ultrasonics On.

The ultrasonics will begin immediately to remove the lead from the slide. 

All lead should be removed within 10 seconds. If your unit passes this 

test, its ultrasonic cavitation is acceptable.

NOTE:

To ensure consistency from test to test, be sure to repeat 

test conditions—use the same solution concentration, liquid level, 

temperature, type of pencil, length of degassing, etc.
55 Service Centers

Service Centers

With normal use, your Ultrasonic Bath should not require servicing. 

However, if it fails to operate satisfactorily, first try to diagnose the 

problem by following the suggestions in the Troubleshooting Guide on 

pages 51–52. 

If you find that your unit needs repair, carefully pack and return it to your 

local distributor. If under warranty, remember to include proof of purchase.

Your unit will be shipped by ground service unless you specify otherwise.

Authorized Service Centers (North America)

Technical Support (North America)

You will void the warranty if you disassemble your 

unit. High voltage inside the unit is dangerous.

Name Address Tel/Fax Number

Alpha Omega 

Electronics Corp.

2821 National Drive

Garland, TX 75041

Tel: 972-271-5571

Tel: 800-540-4967

Fax: 972-840-3668

Crystal 

Electronics Inc.

1251 Gorham St. Unit 2

Newmarket, ON

Canada L3Y 8Y6

Tel: 905-953-9129

Fax: 905-953-7965

Paragon Electronics 6861 SW 196th Ave.

Suite 404

Pembroke Pines,

Florida 33332

Tel: 954-434-8191

Fax: 954-434-8385

Master Sonics

Repair Center

77 Whiting St.

Plainville, CT 06062

Tel: 860-410-1700

 800-737-2198

Fax: 860-410-1704

Name Address Tel/Fax Number

Branson Ultrasonics 

Corp.

41 Eagle Road

P.O. Box 1961

Danbury, CT 06813-1961

Tel: 203-796-0339

Tel: 203-796-2296

Tel: 800-732-9262

Fax: 203-796-2240
56 Service Centers

Authorized Service Center / Technical Support (Europe)

Authorized Service Center / Technical Support (Asia)

Name Address Tel/Fax Number

Branson Ultrasonics BV Vlierberg 26A

NL-3755 BS Eemnes

Tel: 31-35-60-98111

Fax: 31-35-60-98120

Name Address Tel/Fax Number

Branson Ultrasonics 

(Shanghai) Co. Ltd.

758 East Rong Le Dong 

Lu

Song Jiang Industry Zone

Shanghai, 201613 PRC, 

China

Tel: 86-21-3781-0588

Fax: 86-21-5774-5200

Branson Ultrasonics 

Asia Pacific Co. Ltd.

Flat A, 5/F Pioneer 

Building

213 Wai Yip Street

Kwun Tong, Kowloon, 

Hong Kong

Tel: 852-2790-3393

Fax: 852-2790-4998

Branson Ultrasonics 

Div. of Emerson Electric 

(India) Pvt. Ltd.

Plot No A 145/6 TTC 

Industrial Area

NIDC Kopar, Navi 

Mumbai-400705

Tel: 91-22-64598200/220

PT. Global Mega 

Indonesia

Jl. Jababeka III H Blok C 

17 ET

Kawasan Industri 

Jababeka Cikarang

Bekasi 17530, Indonesia

Tel: 62-21-8983-6825,

 62-21-8983-6826

Fax: 62-21-8983-6824

Branson Ultrasonics 

Division of Emerson 

Japan Ltd.

4-3-14 Okada, Atsugi-Shi

Kanagawa 243-0021, 

Japan

Tel: 81-46-229-0429

Fax: 81-46-229-0262

Branson Korea Co. Ltd. DangJeong-dong, 506-7, 

Gunpo-si, Gyeonnggi-do, 

Republic of Korea

Tel: 82-1577-0631

Fax: 82-31-422-9572

Branson Ultrasonics 

Div. of Emerson Elec 

(M) Sdn Bhd.

No. 20, Jalan Rajawali 3, 

Puchong Jaya Industrial 

Park

Batu 8, Jalan Puchong,

47170 Puchong, 

Selangor, Malaysia

Tel: 603-8076-8608

Fax: 603-8076-8302
57 Service Centers

Branson Ultrasonics 

(Philippines Rep Office)

Emerson Building, 104 

Laguna Blvd.

Laguna Technopark Inc.

Sta. Rosa, Laguna

Philippines, 4026

Tel: 63-49-502-8863

Fax: 63-49-502-8860

Branson Ultrasonics

Div. of Emerson Electric

(South Asia) Pte. Ltd.

10 Pandan Cresent

No. 03-06 UE Tech Park

Singapore 128466

Tel: 65-6891-7600

Fax: 65-6873-7882

Branson Ultrasonics 

(Taiwan)

Division of Emerson 

Electric Taiwan Co. Ltd.

5F-3, No. 1, Wu-Chiuan 

First Road

Wu-Ku Ind Zone, HsinChuang City

Taipei County, Taiwan, 

24892

Tel: 886-2-2298-0828

Fax: 886-2-2298-9985

Emerson Electric 

(Thailand) Co. Ltd.

662/39-40 Rama 3 Rd.

Bangpongpang, Yannawa

Bangkok, Thailand 10120

Tel: 662-293-0121-7

Fax: 662-293-0129

Name Address Tel/Fax Number
58 Information for Users on Disposal of Equipment

Information for Users on Disposal of Equipment

This symbol indicates separate collection of waste electrical 

and electronic equipment in the EU-countries and EEA 

(European Economic Area)

Please do not dispose the product with the general 

household waste. Please use the return and collection 

system in your country for the disposal of this product.