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Maintenance and calibration of environment dust monitoring instruments


Virtual and in-person at Everest Hall, ICIMOD, Nepal

Date & Time

25 October 2021 to 29 October 2021


Mohammad Rabi Qazizada , Suresh Pokhrel & Sagar Adhikari

About the workshop

As part of its capacity development work, the Atmospheric Watch Initiative, under the Regional Programme on Atmosphere, has been providing training on the operation, maintenance, calibration, and interpretation of atmospheric monitoring instruments since 2016. These events are aimed at a range of practitioners and tailored to fit the needs and requirements of the member countries and partners. To build on the pervious capacity building activities and fill the knowledge gap, we are initiating a five-day virtual and in-person training, with hands-on exercises on the operation, maintenance, and calibration of the GRIMM.

Since its establishment, the Atmospheric Watch Initiative in collaboration with Nepalese and Bhutanese government partners has established state-of-the-art air quality stations with aerosol and trace gas measurement instruments. GRIMM instruments are used in these stations as the primary instrument to measure dust concentrations (PM). These instruments require regular servicing and calibration to ensure the highest quality of data.



  • Build the capacity of partner institutions – government institutions, academia, and other relevant stakeholders – to operate, maintain and calibrate GRIMM instruments
  • Ensure high quality data and prevent further damage to the instruments



 Day 1 – Monday, 25 October 2021
Time Programme
09:30–09:45 Registration
09:45–10:00 Opening address – Bidya Banmali Pradhan, Regional Programme Manager –

Atmosphere, ICIMOD

Introduction to the training – Bhupesh Adhikary, Senior Air Quality Specialist – Air and Water, ICIMOD

10:00–11:00 Presentation on environment dust monitoring
Working principles and operation of GRIMM Environment Dust Monitor (EDM) 180
11:00–13:00 Installation of GRIMM EDM 180: Instructions and practical session
Presentation on GRIMM EDM 180’s parts, such as the photodetector and pump
Presentation on GRIMM EDM 180’s flow path
Introduction to the inlet dryer: Purpose and working mechanism
13:00–13:45 Lunch break
13:45–15:15 Hands-on training on flow path and parts identification
15:15–17:00 Connecting the instrument to the software (terminal)
Software description, installation, and demonstration
Day 2 – Tuesday, 26 October 2021
09:45–11:00 Inspection with service protocol
11:00–12:00 Dismounting the 187 spectrometer
12:00–13:00 Pre-comparation
13:00–13:45 Lunch break
13:45–17:00 Cleaning procedure

  • EDM180/measurement chamber/optics
  • Sample pipe 182
Day 3 – Wednesday, 27 October 2021
09:45–11:00 Faults search and repair
11:00–13:00 Replacement of pumps
13:00–13:45 Lunch break
13:45–17:00 Replacement of laser assembly
Day 4 – Thursday, 28 October 2021
09:45–11:00 Prepare for calibration
11:00–13:00 Laser adjustment
13:00–13:45 Lunch Break
13:45–17:00 Usage of calibration software
Day 5 – Thursday, 29 October 2021
09:45–11:00 Automatic calibration
11:00–13:00 Dolomite validation
13:00–13:45 Lunch break
13:45–16:30 Ambient air validation
16:30-17:00 Closing remarks – Siva Praveen Puppala, Programme Coordinator –

Atmospheric Watch Initiative, ICIMOD