CALMS support section is here to help you. We hope that Frequently Asked Questions below will help with the most problems. If you can’t find answer to your question feel free to contact us on: info@calms.com

How to invite new end-user, expert to the System?

When you are adding user, expert to system you have to follow these steps:

  1. Choose a system
  2. Setup
  3. Permissions
  4. Add or invite by email

Before adding new user to the system check if user already exits.

1.If user exists:  Then click on Add in the top right corner and type username.

2.If user doesn’t exists: Then click *Invite by email *and type email.

5.Send invite(only if there is no user before)

You can find these answer also inCALMS Web interface manual under section 2.3 Adding user

How to create system and connect edge loggers?

To create system check out Video tutorials

Quick measurement device connection guide for audits with CAL-EDGE-0 and CAL-EDGE-8:



Is it important to fill all the data in Scheme?

Yes. All calculations are based on data that you enter to PID scheme. Data are very important for analysis and audit report and for expert to understand the system.

What is electric motor Power Factor (cos φ) and Efficiency and how to get it?

You can find this data on electric motor nameplate or in the technical documentation of your machine. It is good practice also to measure it.

Power Factor (cos φ)  = True power(kW) / Apparent power(kVA)

Efficiency = Output (kW) / Input(kW)

Efficiency and Power Factor are not the same !

Usually for full loaded power values for cos fi are 0,85 - 0,95. Values for cos fi at unloaded power are 0,4-0,6 .
Typical industrial electric motor Efficiency is from 50-350HP is 0.9

  • 0.96.

How to add compressor detail data ?

  • check compressor nameplate

  • take picture and add to images

Add compressor measured data:

Read compressor settings and measure input voltage, power and read PF (CosFi) on the motor

In the receiver what is the difference between upstream and downstream

volume ?

Upstream receivers are the receivers in the CA room ( normally wet receivers), downstream receivers are the receivers at the production side (usually dry receivers). Some of all receivers must be actual size of all receivers installed in the facility.

How to set correct date and number format ?

When you select your language from CALMS Settings, date format will be automatically in your local format. For English speaking users use English US for MM/DD/YYYY and English Other for DD/MM/YYYY format. Number format decimal dot or comma will be auto detected from your browser setting.

Isentropic efficiency for comparing systems and compressors ?

Isentropic Efficiency (IE) indicates how efficiently a compressor converts electrical energy into compressed air potential energy. The higher the percentage, the better the compressor is at converting electrical energy into compressed air. It’s a simple ratio:

Energy (kW) for the Ideal Compression Process

Isentropic Efficiency (%) =    ————————————————————–

Actual Energy (kW) Consumed

Compressed air system have typical IE around 70%, worst case 50% and best system up to 90%.

Simple calculation for isentropic efficiency for comparing screw compressors, independent from pressure. Isentropic Efficiency normalizes the comparison to simplify the evaluation of efficiency in like sized compressors.

Useful link: https://www.airbestpractices.com/standards/iso-and-cagi/isentropic-efficiency-rotary-screw-air-compressors

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