VWR International West Chester,PA 19380 

vwr.com

1.800.932.5000

ULTRASONIC CLEANERS

INSTRUCTION MANUAL 

MODELS 

97043-930, 97043-932, 97043-934, 97043-936, 97043-938, 97043-940, 97043-942 

97043-944, 97043-946, 97043-948, 97043-950, 97043-952, 97043-954, 97043-956 

97043-958, 97043-960, 97043-962, 97043-964, 97043-966, 97043-968, 97043-970 

97043-972, 97043-974, 97043-976, 97043-978, 97043-980, 97043-982, 97043-984 

97043-986, 97043-988, 97043-990, 97043-992, 97043-994, 97043-996, 97044-000 

97044-002, 97044-004, 97044-006, 97044-008, 97044-010, 97044-012, 97044-014 
Content 

 

 

Description of Safety-related Symbols ---------------------------------------- 

Packing List ------------------------------------------------------------------------------- 

Safety Pre-Cautions ------------------------------------------------------------------- 

Method of Cleaning -------------------------------------------------------------------- 

Application Hints ------------------------------------------------------------------------ 

Cleaning Solutions --------------------------------------------------------------------- 

Optimizing Your Cleaner -------------------------------------------------------------- 

Equipment Specifications ------------------------------------------------------------- 

Page 

1 

2 

3 

4 

5 

6, 7 

8, 9 

10 ~ 12 

13 

14, 15 

16 ~ 19 

20 ~ 23 

24 

25 

Optional Accessory --------------------------------------------------------------------- 

Operating Your Cleaner with Ultrasonic Feature -------------------------------

Operating Your Cleaner with Ultrasonic & Heating Feature ----------------- 

Operating Your Cleaner with Ultrasonic, Heating & Degassing Feature 

Troubleshooting ------------------------------------------------------------------------- 

Warranty ---------------------------------------------------------------------------------- 
Description of Safety-related Symbols 

SYMBOLS:

Alternating Current. 

 

Protective Conductor Terminal. (Always replace the protective conductor 

 after servcing!) 

 

Attention, consult accompanying documents. (Always consult this ! instruction manual when this symbol is used on the equipment!) 

Caution, hot surface. 

 

 

 

 

 

 

 

1 
Packing List 

Item Quantity Note 

Instrument 1 unit

Instruction Manual 1 piece 

Cover 1 piece

Support rack 1 piece 

Soft Drainpipe 1 piece 9.5L (Include 9.5L) or above model 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 
Safety Pre-Cautions 

Before using your Ultrasonic Cleaner, please read and thoroughly understand

these warnings. Failure to follow them may result in serious personal injury of 

property damage. 

1. To avoid electrical shock

z Only use the cleaner where there is a good grounding connection. 

!

z Unplug from power source before filling or emptying the tank. 

z Don’t disassemble your cleaner-high voltage inside the cleaner is 

dangerous. 

z Don’t immerse the cleaner in water.

2.To avoid personal injury and property damage

z Don’t use alcohol, gasoline or other flammable solvents to avoid explosion or 

fire. 

!

z Cleaning trough or detergent may be hot, don’t touch with hand. 

z Don’t let the temperature of the cleaning liquid to go over 70°C. 

3. Avoid damaging the facility

z Don’t operate the cleaner dry.

z Don’t use strong acid or alkali or other corrosive solution to avoid damaging 

the cleaning trough.

z Only water soluble detergent should be used. 

z The cleaner should not be started while there is no cleaning liquid in the 

trough. 

z The water surface should not be lower than "MIN.LEVEL" to prevent damage to 

heating device. 

z Don’t directly place the work piece on the bottom of the trough, it should be 

suspended or placed on a support rack so as to avoid damaging energy 

converter. 

z The cleaning liquid should be changed regularly; otherwise dirt deposits will 

form at the bottom of the trough which may affect the cleaning results of

ultrasonic cleaning. Moreover, many types of detergent lose potency in time; 

therefore detergent should be added periodically. 

 

 

!

3 
 Method of Cleaning 

Ultrasonic sound is sound transmitted at frequencies generally beyond the range of 

human hearing. In your ultrasonic cleaner, ultrasonic sound (sonics) is used for 

cleaning materials and parts. 

Direct cleaning (refer to figure 1)

Place water and detergent in the cleaning trough, then place work piece on the 

support rack, Lower them into the trough or suspend the work piece then lower them 

into the liquid. 

Indirect cleaning (refer to figure 2) 

Place water and detergent into the cleaning trough, and put all the chemicals into a 

beaker or other suitable container and then put the work piece into the liquid. Now put 

the container of the chemical detergent and work piece into the trough. 

Caution: do not let the container touch the bottom of the trough.

 

The direct and indirect cleaning methods both have advantages and disadvantages. If 

you are not sure which one to choose please carry out tests first before making a

choice. The advantage of the direct cleaning method is that the cleaning is very

efficient and easy to operate. The indirect cleaning also has advantages, which are 

that the dirt being cleaned off can be clearly seen in the beaker or the container, and 

then it can be filtered out or disposed of. Also at the same time we can use two or 

more than two types of cleaning solvents. 

 

4 
Application Hints 

 

1. Choose the cleaning method: 

z Direct cleaning: place the support rack, water, detergent, and work piece into the 

trough, or suspend the work piece in a bracket and submerge them into the 

cleaning liquid. It is strictly prohibited to put alcohol, propylene, gasoline or other 

flammable solvent, or strong acid or alkali, or other corrosive liquid into the trough. 

If the above mentioned solvent is necessary then we recommend the use of indirect 

cleaning method.

z Indirect cleaning: put water and detergent into trough, put all necessary chemicals 

into the beaker or other proper container, and submerge them into the cleaning 

liquid. Then put all the chemical detergent and work piece into the trough. 

2. The cleaner is powered by connecting the mains plug to a standard socket-outlet, 

always place the cleaner in such a way that it is easy for the operator to unplug the 

mains plug in emergency.

3. Position your cleaner within easy reach of a standard grounded electrical outlet. Do 

not place the cleaner on a circuit which could become overloaded. 

4. These cleaners are NOT floor standing equipment. Always use the cleaners on 

tables, work benches, and other similar surfaces. 

5. Always use the cleaners in an environment of good ventilation. Special care should 

be taken not to block the bottom fan vent of the relevant models. 

6. Please always keep the liquid level between the "MA X.LEVEL ”and “MIN.LEVEL”. 

7. Adjust the timing to proper time. Work piece of different types require different 

cleaning times. Most of them only need about a few minutes while others might

take a bit longer. The details can be decided via testing. 

8.

 It is faster and more efficient to run several small loads rather than few big loads. 

9.Turn power on,wait 10 minutes to let the cleaner liquid to purge the gas, the process

of which is only required at the beginning of every day cleaning or after the change 

 of solvent. 

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

solution. Turn on the heater (press the HEAT switch, if available), turn on the 

ultrasonics (press the SONICS), add the cover and the solution will heat quickly to 

temperature. 

11. Rinse, drying and lubrication: 

z Rinse the parts to remove the chemicals which adhere to the parts after cleaning.

z Dry the parts with clean compressed air, hot air blower or in an oven.

z Relubricate parts that need lubrication. 

Please call VWR if you have application questions. 

5 
Cleaning Solutions 

WARNING 

Do not use corrosive solutions, such as bleaches, strong acids or powerful caustics, in 

ultrasonic tanks, or you will void the warranty. Only use non-flammable solutions and 

water-based solutions.

Solution types: 

Water-based solutions are either slightly acidic or alkaline. They include detergents, 

soaps and industrial cleaners designed to remove specific contaminates. 

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 contaminate from redepositing on the cleaned surface, and improves cleaning 

action in hard water.

 

Change the cleaning solution periodically. Cleaning solutions can become 

contaminated with suspended contaminate particles which coat the tank bottom. This 

coating dampens the ultrasonic action and reduces cleaning efficiency. Certain 

solutions will cavitate better than others. Contact VWR 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 contaminates. 

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

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

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

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.

!

6 
Cleaning Solutions 

WARNING

Free hydrogen may be released if solution comes in contact with reactive metals 

Solution Effects on Metals: 

Cleaning 

agent 

Steel Brass Aluminum Magne 

sium 

Zinc 

S. 

Steel 

Copper 

Tin

Optical(1) none none none none** none** none none**

Jewelry

Cleaner(1) 

none none none none none none none

Buffing(1) 

compound

none Slight 

stain 

none none attacks none none

Oxide 

Remover 

slight 

etch 

none slight 

attack 

attacks attacks none none

Electronic 

cleaner(1) 

none none slight 

attack 

none none none none

General 

purpose(1) 

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

Rust(3) 

stripper 

none none attacks attacks attacks none slight

attack

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

**No effect if solution temperature is less than 60°C 

 

!

7 
Optimizing Your Cleaner 

 

 

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 cleaner before emptying the tank. Empty the 

solution into a waste disposal unit. 

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

operating level (1 inch from the top with beaker/support rack in place), using 

warm tap water.

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

bulky loads from the cleaner, 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 support rack and/or beaker positioning cover to support all items. Allow at 

least 1 inch between the tank bottom and the beaker or receptacle for adequate 

cavitation.

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

excessive liquid evaporation. 

Shell: 

Cleaning- the ultrasonic cleaner may be cleaned using a dry soft towel. Do not use 

liquids to clean.

 

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 - a cleaner with heater and with a cover will stabilize at 70°C approx,

running continuously. Ultrasonics will add heat to the solution. 

Solution:

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

cavitation for cleaning. 

Degassing - 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. 

Heat - increases the chemical activity of cleaning solutions. 

Surface tension - can be reduced by adding a wetting agent of surfactant to the bath.

Reduced surface tension will increase cavitation. 

8 
Optimizing Your Cleaner 

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

cleaner, where ignition is possible from electrical components. 

Renewal - replace cleaning solutions often to increase ultrasonic cleaning activity. 

Solutions, as with most chemicals, become spent over time. Solutions can become 

contaminated with suspended contaminate particles which coat the tank bottom, 

inhibiting ultrasonic activity. 

9 
Equipment Specifications

Digital Timer 

Model 

Input 

power supply 

(V~) 

Capacity

(L) 

Tank Size 

W×H×D 

(mm) 

Max.

Power 

Require 

(W) 

RFPower 

(W) 

Built-in 

Drains

97043-958 220V~50/60Hz 

97043-960 117V~ 60Hz 

1.9 150×100×140 140 48 —

97043-962 220V~50/60Hz 

97043-964 117V~ 60Hz 

2.8 240×100×140 240 90 —

97043-966 220V~50/60Hz 

97043-968 117V~ 60Hz 

5.7 300×150×150 400 144 —

97043-970 220V~50/60Hz 

97043-972 117V~ 60Hz 

9.5 300×150×240 590 180 YES 

97043-974 220V~50/60Hz 

97043-976 117V~ 60Hz 

13.8 330×150×300 790 240 YES

97043-978 220V~50/60Hz 

97043-980 117V~ 60Hz 

20.8 500×150×300 1120 320 YES

97043-982 220V~50/60Hz 

97043-984 117V~ 60Hz 

28.4 500×200×300 1450 384 YES

NOTE : 

z Frequency : 35kHz +3.5/-0.5 

z Operating temperature range : 5 ~ 40°C; Relative humidity range : RH 0 ~ 90% . 

z Operated under altitude up to 2000m and as indoor use.

z Storage/Shipping temperature range : -25 ~ 55°C; Relative humidity range : 

RH 0 ~ 90%.

10 
Equipment Specifications 

Digital Controller,Timer and Heat 

Model 

Input 

power supply 

(V~) 

Capacity

(L) 

Tank 

Size 

W×H

×D 

(mm) 

Max.

Power 

Require

(W) 

RFPower 

(W) 

Heating 

Power 

(W) 

Built-in 

Drains

97043-986 220V~50/60Hz 

97043-988 117V~ 60Hz 

1.9 

150 

×100 

×140 

140 48 64 —

97043-990 220V~50/60Hz 

97043-992 117V~ 60Hz 

2.8 

240 

×100 

×140 

240 90 104 —

97043-994 220V~50/60Hz 

97043-996 117V~ 60Hz 

5.7 

300 

×150 

×150 

400 144 204 —

97044-000 220V~50/60Hz 

97044-002 117V~ 60Hz 

9.5 

300 

×150 

×240 

590 180 326 YES 

97044-004 220V~50/60Hz 

97044-006 117V~ 60Hz 

13.8 

330 

×150 

×300 

790 240 436 YES 

97044-008 220V~50/60Hz 

97044-010 117V~ 60Hz 

20.8 

500 

×150 

×300 

1120 320 654 YES 

97044-012 220V~50/60Hz 

97044-014 117V~ 60Hz 

28.4 

500 

×200 

×300 

1450 384 892 YES 

NOTE : 

z The temperature readout accuracy is ±3°C 

z Frequency : 35kHz +3.5/-0.5 

z Operating temperature range: 5 ~ 40°C; Relative humidity range : RH 0 ~ 90% . 

z Operated under altitude up to 2000m and as indoor use.

z Storage/Shipping temperature range: -25 ~ 55°C; Relative humidity range : 

RH 0 ~ 90%.

11
Equipment Specifications 

Digital Controller,Timer、Heat and Degas 

Model 

Input 

power supply 

(V~) 

Capacity

(L) 

Tank 

Size 

W×H

×D 

(mm) 

Max.

Power 

Require

(W) 

RFPower 

(W) 

Heating 

Power 

(W) 

Built-in 

Drains

97043-930 220V~50/60Hz 

97043-932 117V~ 60Hz 

1.9 

150 

×100 

×140 

140 48 64 —

97043-934 220V~50/60Hz 

97043-936 117V~ 60Hz 

2.8 

240 

×100 

×140 

240 90 104 —

97043-938 220V~50/60Hz 

97043-940 117V~ 60Hz 

5.7 

300 

×150 

×150 

400 144 204 —

97043-942 220V~50/60Hz 

97043-944 117V~ 60Hz 

9.5 

300 

×150 

×240 

590 180 326 YES 

97043-946 220V~50/60Hz 

97043-948 117V~ 60Hz 

13.8 

330 

×150 

×300 

790 240 436 YES 

97043-950 220V~50/60Hz 

97043-952 117V~ 60Hz 

20.8 

500 

×150 

×300 

1120 320 654 YES 

97043-954 220V~50/60Hz 

97043-956 117V~ 60Hz 

28.4 

500 

×200 

×300 

1450 384 892 YES 

NOTE : 

z The temperature readout accuracy is ±3°C 

z Frequency : 35kHz +3.5/-0.5 

z Operating temperature range: 5 ~ 40°C; Relative humidity range : RH 0 ~ 90% . 

z Operated under altitude up to 2000m and as indoor use.

z Storage/Shipping temperature range: -25 ~ 55°C; Relative humidity range : 

RH 0 ~ 90%.

12 
Optional Accessory

Cover(Included in products with heating feature)

Capacity 1.9L 2.8L 5.7L 9.5L 13.8L 20.8L 28.4L

Product 

Number 

97044-016 97044-018 97044-020 97044-022 97044-024 97044-026

Support rack(Included in products)

Capacity 1.9L 2.8L 5.7L 9.5L 13.8L 20.8L 28.4L

Product 

Number 

97044-042 97044-044 97044-046 97044-048 97044-050 97044-052

Basket

Capacity 1.9L 2.8L 5.7L 9.5L 13.8L 20.8L 28.4L

Product 

Number 

97044-028 97044-030 97044-032 97044-034 97044-036 97044-038 97044-040

Soft Drainpipe(Included in products)

Capacity 5.7L 9.5L 13.8L 20.8L 28.4L

Product Number 97044-060 

Beaker Positioning Cover 

(Applicable to 500ml beaker)

Capacity 1.9L 2.8L 5.7L 9.5L 13.8L 20.8L 28.4L

Product Number 97044-054 97044-056 97044-058 

13 
Operating Your Cleaner with Ultrasonic Feature 

MODEL: 

97043-958, 97043-960, 97043-962, 97043-964, 97043-966, 97043-968, 97043-970 

97043-972, 97043-974, 97043-976, 97043-978, 97043-980, 97043-982, 97043-984 

Explanation of controls: 

1. Plug in the power supply,“STANDBY” light is on. 

2. Turn on the power switch,“STANDBY” light is off, cleaner starts to work for 15 

minutes as default,“TIME ON” light is on. 

3. Time can be reset during operation to 1-99 minutes. Press the time adjust key and 

hold for more than 2 seconds,the number displayed will increase or decrease. To

stop, press the timer key for over 1 second, the cleaner will resume work. 

4. If the time does not need to be set, press the timer switch until the number 

displayed disappears and “TIME ON” light is off. 

5. If the unit is turned off when it is in operation and the power is not removed, it will 

restore the status and setup of the last operation when it is turned on again.

6. There will be 6 buzzes as notification after the set time has expired. 

Before you start cleaning: 

WARNING

z Don’t place parts or containers directly on the bottom of the cleaning tank; use a 

support rack, wire or beaker cover to suspend items.

z The water surface should not be lower than “MIN.LEVEL”. 

z Don’t ever use alcohol, gasoline or flammable solution. Doing so could cause a fire 

or explosion. Use only water-based solutions.

z Don’t ever use mineral acids or bleaches. These could damage the tank.

TIME ON 

TIME OFF

Timing Display

!

min

T Time adjustment imer switch

14 

STANDBY
Operating Your Cleaner with Ultrasonic Feature 

Step

1. Select your cleaning solution. 

2. Allowing for the volume of the parts you will be cleaning and 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 cleaner into a grounded outlet. 

Cleaning items:

Step

1. Set the TIMER for the amount of time you wish the items to be cleaned. 

2. Place the items into a basket or beakers in a positioning cover.

3. If using beakers, add cleaning solution to beakers to cover the items.

4. Slowly lower the basket or beakers into the tank. Do not allow items to contact the 

tank bottom. Do not stir the solution.

5. When items are clean, slowly remove them from the cleaner.

6. Rinse the clean items with clean water and dry them, if necessary.

15 
Operating Your Cleaner with Ultrasonic & Heating Feature 

MODEL: 

97043-986, 97043-988, 97043-990, 97043-992, 97043-994, 97043-996, 97044-000 

97044-002, 97044-004, 97044-006, 97044-008, 97044-010, 97044-012, 97044-014 

Explanation of controls: 

1. Plug in the power and the Power Indicator will flash.

2. Switch on the power and the Power Indicator will be off. The Timing Display

shows the default ultrasonic timing of 15 minutes and the Temperature Display

shows real time temperature of the bath. If it is not necessary to adjust these timing, 

press the SONICS key to start operation. 

 STEP: 

1 Press the key 

 

2 Press the key to start 

 ultrasonic

 

 

MODE 

min oC

HEATING

Power 

Indicator 

Temperature Display 

“Adjust” Key

Timing Display 

POWER 

SONICS 

ON/OFF 

HEAT

ON/OFF

Heating 

Indicator 

MODE

POWER 

min °C

HEATING 

SONICS 

ON/OFF 

HEAT

ON/OFF 

SONICS

ON/OFF

 1 2 

3. Users can use MODE key and Adjust key to change timing, temperature and

degassing setup. The range of timing setup is 1~ 99 minutes and temperature setup 

is 20 ~ 69°C 

z Change Ultrasonic Timing Setup 

 Press MODE key till number on the timing screen flashes. Press the Adjust 

key to change timing. Turn on the SONICS key thereafter to start ultrasonic. 

Press the Adjust key for over 2 seconds, the number on the screen will change 

rapidly. After the set time is expired, there will be a 6 buzz notification.

16 
Operating Your Cleaner with Ultrasonic & Heating Feature 

STEP:

 

Press key till number 

on the timing screen flashes 

 

 2 Press the key to 

change timing 

 

 3 Press the key to start

ultrasonic 

 

z Change Set Temperature

Press MODE key till the number on the Temperature Display flashes (the shown 

number at this point is set temperature). Press the Adjust key to change set 

temperature and then turn on the HEAT key to start heating. The Heating Indicator

will flash and the number on Temperature Display will show bath temperature 

(Temperature Display usually shows bath temperature and shows set temperature 

only when adjusting set temperature). 

STEP:

1 Press key till number on 

the temperature display flashes 

 

 2 Press the key to

change set temperature

 

 3 Press the key to start

heating

When temperature of solution in the bath reaches set temperature, the machine will 

stop heating. There will be 2 buzz as notification and the Heating Indicator will be on 

but stop flashing. Press the Adjust key for over 2 seconds, the number on 

Temperature Display will change rapidly.

z Change Set Temperature at Heating Status 

When the machine is in heating status, press the MODE key till the number on 

Temperature Display flashes. Press the Adjust key to change the number to the 

desired temperature (the machine will keep at heating status during the setup 

process). After the setup finishes, the machine will run towards the set temperature 

automatically without turning on HEAT key again. 

MODE

MODE

POWER 

min °C

HEATING 

SONICS 

ON/OFF 

HEAT

ON/OFF SONICS 

ON/OFF 

3 2 1

MODE

POWER 

min °C

HEATING 

SONICS 

ON/OFF 

HEAT

ON/OFF 

MODE

HEAT

ON/OFF 

3 2 1

17 
Operating Your Cleaner with Ultrasonic & Heating Feature 

4. If the unit is turned off when it is in operation and the power is not removed, it will 

restore the status and setup of the last operation when it is turned on again. 

5. Turn on the power and start heating at ultrasonic standby status (ultrasonic is not 

turned on), the machine will activate ultrasonic device for 5 seconds every 2 

minutes to balance solution temperature. The function is not available at degassing 

standby status. 

6. When ultrasonic or degassing finishes, heating stops simultaneously and the machine

turns to standby status. To maintain the temperature, simply turn on the machine 

and then turn on HEAT key. The machine will restore the set temperature of the last

operation and go to heating status. 

NOTE: 

You may require an exact/constant temperature for your application. Please note that 

ultrasonics may continue to heat the solution beyond your set temperature, even 

though the heater has cycled off and the “Heat On” light is still light. If this happens, 

turn the cleaner off and allow the solution to cool down. For a fast cool down, replace 

some of the warm solution with cold solution. 

The optimal temperature of the heating solution is 55 ~ 60°C. When the temperature

goes up to 65 ~ 80°C, ultrasonic internal resistance would increase by 10~20% and 

the power would reduce by 24~34%

Before you start cleaning: 

WARNING

z Don’t place parts or containers directly on the bottom of the cleaning tank; use a 

support rack, wire or beaker cover to suspend items.

z The water surface should not be lower than “MIN.LEVEL” to prevent damages to 

heating device. 

z Don’t ever use alcohol, gasoline or flammable solution. Doing so could cause a fire 

or explosion. Use only water-based solutions.

z Don’t ever use mineral acids or bleaches. These could damage the tank.

Step

1. Select your cleaning solution.

2. Allowing for the volume of the parts you will be cleaning and cleaning solution, fill 

the tank with warm tap water to the operating level line. 

3. Add cleaning solution to the tank water.

5. Plug the cleaner into a grounded outlet. 

!

18 
Operating Your Cleaner with Ultrasonic & Heating Feature 

Cleaning items:

Step

1. Set the TIMER for the amount of time you wish the items to be cleaned. 

2. Place the items into a basket or beakers in a positioning cover.

3. If using beakers, add cleaning solution to beakers to cover the items.

4. Slowly lower the basket or beakers into the tank. Do not allow items to contact the 

tank bottom. Do not stir the solution.

5. When items are clean, slowly remove them from the cleaner.

6. Rinse the clean items with clean water and dry them, if necessary.

19 
Operating Your Cleaner with Ultrasonic, Heating & Degassing Feature 

MODEL: 

97043-930, 97043-932, 97043-934, 97043-936, 97043-938, 97043-940, 97043-942 

97043-944, 97043-946, 97043-948, 97043-950, 97043-952, 97043-954, 97043-956 

Explanation of controls: 

1. Plug in the power and the Power Indicator will flash.

2. Switch on the power and the Power Indicator will be off. The Timing Display

shows the default ultrasonic timing of 15 minutes and the Temperature Display

shows real time temperature of the bath. If it is not necessary to adjust these timing, 

press the SONICS key to start operation. 

STEP: 

1 Press the key 

 

2 Press the key to start 

 ultrasonic

 

 

Heating 

Indicator 

min oC

HEATING

SONICS 

ON/OFF 

HEAT

ON/OFF

MODE

POWER DEGAS

DEGAS 

ENTER / ESC

Power 

Indicator 

Temperature Display 

Degassing 

Indicator 

“Adjust / Confirm Degassing” Key 

SONICS 

ON/OFF 

HEAT

ON/OFF 

SONICS

ON/OFF

min °C

HEATING 

POWER 

MODE

DEGAS

DEGAS 

ENTER / ESC 

Timing Display 

 1 2 

3. Users can use MODE key and Adjust key to change timing, temperature and

degassing setup. The range of timing setup is 1~ 99 minutes and temperature setup 

is 20 ~ 69°C 

z Change Ultrasonic Timing Setup 

 Press MODE key till number on the timing screen flashes. Press the Adjust 

key to change timing. Turn on the SONICS key thereafter to start ultrasonic. 

Press the Adjust key for over 2 seconds, the number on the screen will change 

rapidly. After the set time is expired, there will be a 6 buzz notification. 

20 
Operating Your Cleaner with Ultrasonic, Heating & Degassing Feature 

 

 

STEP:

 

Press key till number 

on the timing screen flashes 

 

 2 Press the key to 

change timing 

 

 3 Press the key to start

ultrasonic 

 

 

 

z Change Set Temperature

Press MODE key till the number on the Temperature Display flashes (the shown 

number at this point is set temperature). Press the Adjust key to change set 

temperature and then turn on the HEAT key to start heating. The Heating Indicator

will flash and the number on Temperature Display will show bath temperature 

(Temperature Display usually shows bath temperature and shows set temperature 

only when adjusting set temperature). 

STEP:

1 Press key till number on 

the temperature display flashes 

 

 2 Press the key to

change set temperature

 

 3 Press the key to start

heating

 

When temperature of solution in the bath reaches set temperature, the machine will 

stop heating. There will be 2 buzz as notification and the Heating Indicator will be on 

but stop flashing. Press the Adjust key for over 2 seconds, the number on 

Temperature Display will change rapidly. 

z Set Degassing and Adjust Degassing Timing 

Press MODE key till the Degassing indicator flashes. Press Adjust key f 

once (either up or down) to confirm degassing status. The Degassing Indicator will 

be on and the Timing Display will show the 5-minute default degassing timing and

flash (users can then press Adjust key to select degassing timing within the range

of 1~99 minutes). Turn on the SONICS key to start degassing. 

MODE

SONICS 

ON/OFF 

3 2 1

SONICS 

ON/OFF 

HEAT

ON/OFF 

min °C

HEATING 

POWER 

MODE

DEGAS

DEGAS 

ENTER / ESC 

MODE

HEAT

ON/OFF 

3 2 1

SONICS 

ON/OFF 

HEAT

ON/OFF 

min °C

HEATING 

POWER 

MODE

DEGAS

DEGAS 

ENTER / ESC 

21 
Operating Your Cleaner with Ultrasonic, Heating & Degassing Feature 

STEP: 

 1 Press key till the 

degassing indicator flashes 

 

 2 Press key once 

 (either up or down) to confirm 

 degassing status 

 3 Press key to 

select degassing timing 

 

4 Press the key to start 

degassing 

 

SONICS 

ON/OFF 

MODE

SONICS 

ON/OFF 

HEAT

ON/OFF 

min °C

HEATING 

POWER 

MODE

DEGAS

DEGAS 

ENTER / ESC 

4 2 3 1

z Change Set Temperature at Heating Status 

When the machine is in heating status, press the MODE key till the number on 

Temperature Display flashes. Press the Adjust key to change the number to the 

desired temperature (the machine will keep at heating status during the setup 

process). After the setup finishes, the machine will run towards the set temperature 

automatically without turning on HEAT key again. 

4. If the unit is turned off when it is in operation and the power is not removed, it will 

restore the status and setup of the last operation when it is turned on again. 

5. Turn on the power and start heating at ultrasonic standby status (ultrasonic is not 

turned on), the machine will activate ultrasonic device for 5 seconds every 2 

minutes to balance solution temperature. The function is not available at degassing 

standby status. 

6. When ultrasonic or degassing finishes, heating stops simultaneously and the machine

turns to standby status. To maintain the temperature, simply turn on the machine

and then turn on HEAT key. The machine will restore the set temperature of the last

operation and go to heating status. 

NOTE: 

You may require an exact/constant temperature for your application. Please note that 

ultrasonics may continue to heat the solution beyond your set temperature, even 

though the heater has cycled off and the “Heat On” light is still light. If this happens, 

turn the cleaner off and allow the solution to cool down. For a fast cool down, replace 

some of the warm solution with cold solution. 

The optimal temperature of the heating solution is 55 ~ 60°C. When the temperature

goes up to 65 ~ 80°C, ultrasonic internal resistance would increase by 10~20% and 

the power would reduce by 24~34%. 

22 
Operating Your Cleaner with Ultrasonic, Heating & Degassing Feature 

Before you start cleaning: 

WARNING

z Don’t place parts or containers directly on the bottom of the cleaning tank; use a 

support rack, wire or beaker cover to suspend items.

z The water surface should not be lower than “MIN.LEVEL” to prevent damages to 

heating device. 

z Don’t ever use alcohol, gasoline or flammable solution. Doing so could cause a fire 

or explosion. Use only water-based solutions.

z Don’t ever use mineral acids or bleaches. These could damage the tank.

Step

1. Select your cleaning solution.

2. Allowing for the volume of the parts you will be cleaning and 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 cleaner into a grounded outlet. 

Cleaning items:

Step

1. Set the TIMER for the amount of time you wish the items to be cleaned. 

2. Place the items into a basket or beakers in a positioning cover.

3. If using beakers, add cleaning solution to beakers to cover the items.

4. Slowly lower the basket or beakers into the tank. Do not allow items to contact the 

tank bottom. Do not stir the solution.

5. When items are clean, slowly remove them from the cleaner.

6. Rinse the clean items with clean water and dry them, if necessary.

 

 

 

 

 

 

!

23 
Troubleshooting 

Problem Reason Action

Long alarm after power 

plugged in. 

Whole screen display 

or non-display 

The instrument is not ready.

Unplug the power plug 

and plug in after 6 

seconds 

Power not plugged in Plug in 

The receptacle has no 

power 

Find a receptacle with 

power 

Can't turn on ultrasonic 

or heating function. 

Fuse blown Call qualified maintenance 

personnel 

Without degas process, the 

solution is easier to produce 

bubble after heating. 

Turn on for at least 5 

minutes 

Higher liquid line after putting 

in rinsed object 

Lower the liquid line to the

recommended liquid level

Dirt covers the trough bottom Empty the trough and 

clean the bottom. 

Weak ultrasonic effect. 

Cleaning solution loses effect 

after long use. Replace solution. 

Incorrect status after 

pressing button Switch failure 

Shutdown and restart the 

instrument 

24 
Warranty

VWR Ultrasonic Cleaners, when used in accordance with manufacturer’s instructions 

and under normal use, are guaranteed for two years after date of shipment. Within the 

period guaranteed, VWR will repair or replace free of charge, at its sole discretion. 

VWR Ultrasonic Cleaners, when used in accordance with manufacturer’s instructions 

and under normal environment conditions as described in equipment specifications, 

are guaranteed to satisfy the IEC 61010-1:2001 safety provisions or UL61010-1:2004,

CAN/CSA C22.2 NO.61010-1:2004 safety provisions.If used in a manner not specified 

by the manufacturer’s instructions, the protection provided by the cleaners may be 

impaired. 

WARNING

z Don’t place parts or containers directly on the bottom of the cleaning tank; use a 

support rack, wire or beaker cover to suspend items. 

z The water surface should not be lower than “MIN.LEVEL” to prevent damages to 

heating device. 

z Don’t ever use alcohol, gasoline or flammable solution. Doing so could cause a fire 

or explosion. Use only water-based solutions. 

z Don’t ever use mineral acids or bleaches. These could damage the tank. 

z Don’t disassemble your cleaner or you will void the warranty. High voltage inside

the cleaner is dangerous. 

Failure to comply with these warnings will void your warranty. 

VWR’s liability, whether based on warranty, negligence 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 cause exceed the cost of repair or replacement of the 

defective equipment, and such repair of replacement shall be the exclusive remedy of 

the purchaser, and in no case shall VWR be responsible for any and/or all 

consequential damages including without limitation, and/or all consequential damages 

arising out of commercial losses. 

Please check your cleaner and its carton carefully for external or internal damage. If 

you find damage, contact shipping carrier immediately, before contacting your 

distributor. 

Please retain your packaging for future use. 

With normal use,your ultrasonic cleaner 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. 

If your cleaner needs repair, please contact VWR. 

!

25