Three types of calculations are available.
For more diverse calculations, use the Cosmo Calculation Sheet.

① Calculation of Equivalent Internal Volume/Detection Time/Differential Pressure/Leak Rate
② Gas Leak Rate Comparison (In case of the same Gas)
③ Gas & Liquid Leak Rate comparison

【How to use】
・Enter single-byte numbers in all white boxes.
・Press the Calculation button to display the result in the gray box.
・When the Delete button is displayed, pressing it will erase all input values and results.

Calculation of Equivalent Internal Volume/Detection Time/Differential Pressure/Leak Rate

 

 

After selecting the item to be calculated, enter values for other items and press the Calculation button.

 

Leak Rate

Equivalent Internal Volume

Detection Time

Differential Pressure

 

 

 

 

 

 

Gas Leak Rate Comparison (In case of the same Gas)

 

 

Enter values for Test Pressure before a change/Test Pressure after a change/Leak Rate before a change and press the Calculation button.

 

Test Pressure before a change (kPa) P1

 

Test Pressure after a change (kPa) P2

 

Choose one of the two and enter the value in the white box provided.

Leak Rate before a change（atm mL/s) Q1

Leak Rate before a change（atm mL/min) Q1

 

 

 

 

 

 

 

 

 

Leak Rate after a change（atm mL/s) Q2

 

Leak Rate after a change（atm mL/min) Q2

 

Leak Rate Comparison　Q2/Q1

 

 

 

Gas & Liquid Leak Rate comparison

 

 

Enter values for Test Pressure of Gas/Test Pressure of Liquid/Viscosity Coefficient of Gas/Viscosity Coefficient of Liquid/Leak Rate of Gas or Leak Rate of Liquid and press the Calculation button.

 

Test Pressure of Gas (kPa) Pg

 

Test Pressure of Liquid (kPa) Pl

 

Copy values from the Viscosity Coefficient List and paste them into the boxes for entering the viscosit coefficients.

 

Viscosity Coefficient of Gas (Pa・s) ng

 

Gas／View List

 

 

 

Viscosity Coefficient of Liquid (Pa・s) ng

 

Liquid／View List

 

 

 

Choose one of the two and enter the value in the white box provided.

Leak Rate of Gas （mL/min）

Leak Rate of Liquid （mL/min）

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Leak Rate Comparison　Ql/Qg

Cosmo Calculation Sheets are multifunctional calculation sheets made in Excel.
Just enter the conditions, and solutions such as the leak rate and the volume equivalent are displayed.
Cosmo Calculation Sheets consist of the following seven calculation sheets.

• 1. Internal volume and leak rate of air leak testers
• 2. Leak calibrators
• 3. Calculations for selecting a leak MASTER
• 4. Leak rates of gases and liquids
• 5. Volume and temperature changes
• 6. Orifice flow
• 7. Laminar flow tube and flow rate conversion

Cosmo Calculation Sheets can be downloaded and used free of charge by registering from the link below.
<Requirements>

• Excel97～Excel2012
• Uses macro features.。
• It is for Windows.

Download for free here