Emerson Branson CPX1800, Instruction Manual, Page: 64 / 78

56 100-214-294 REV. 05
6.5.10 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.
6.5.11 Solution
Table 6.24 Measuring the Solution Temperature
Step Action
1 Ensure that sonics and heaters are off.
2 Stir the solutions 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.
Table 6.25 Solution Usage
Item Definition
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
It can be reduced by adding solution to the bath. Reduced surface
tension will increase cavitation intensity and enhance cleaning.
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.