SOP Title: Calibration of Magnehelic Gauge
- Objective:
To lay down a procedure for Calibration of Magnehelic Gauge in the facility.
- Scope:
This procedure is applicable for the Calibration of Magnehelic Gauge installed in the different sections or areas in the facility to monitor/indicate pressure or pressure differential in the area or system/equipment.
- Responsibility:
3.1 Engineering Department: To prepare and review the SOP. To follow the procedure laid down for the calibration of Magnehelic Gauge as per this SOP.
3.2 Quality Assurance Department: To review and approve the SOP and Annexes. To ensure compliance of the procedure.
3.3 Concerned Department: To assist in the calibration activity and monitor the routine measurement of the gauges.
- Accountability:
Head, Engineering Department / Head, Quality Assurance Department.
- Procedure:
- Definitions:
5.1.1 Engineering Associate: Executive or Operator of Engineering Department trained to perform duties as per this SOP.
5.1.2 Preventive Maintenance: Maintenance activity performed to ensure that the equipment will function smoothly and to avoid breakdowns. These activities are performed as per predefined frequency.
5.2. Operational Procedure:
| Safety Precautions/Instructions: | ||
| 5.2.1 | Wear appropriate Personal Protective Equipment while operating the Magnehelic Gauge. | |
| 5.2.2 | Take clearance from the Concerned Department Head for execution of calibration activity for Magnehelic Gauges. | |
| 5.2.3 | Carry all the necessary instruments/items safely to the respective area. | |
| 5.2.4 | Ensure that the Magnehelic Gauges are in working condition and free from any sign of damage. | |
| Calibration | ||
| 5.2.5 | Frequency: Once in a Year or After any breakdown. | |
| 5.2.6 | Remove the Magnehelic Gauge and its tubing properly from the platform. | |
| 5.2.7 | Keep the Magnehelic Gauges in vertical position. | |
| 5.2.8 | Before starting calibration set the deflection needle on zero with the help of a screw driver. | |
| 5.2.9 | Connect the tubing of the Reference Gauge and Magnehelic Gauge to pressure port. | |
| 5.2.10 | Ensure that there is no leakage in the set up by applying some pressure. | |
| 5.2.11 | Set the pressure in the Magnehelic Gauge by rotating the screw knob at different values as 0, 02, 04, 06, 08 and 09 (or at minimum of 5 calibration points to cover the specified limit) etc and allow stabilising for at least one minute each time. Record the reading shown in the Reference Gauge against each set parameter after stabilizing. | |
| 5.2.12 | The reading on the gauge to be calibrated should be within the specified tolerance (± 2 % of Full Scale). Record both readings on the calibration record as specified in Annexure. | |
| 5.2.13 | Repeat this procedure for each gauge to be calibrated. | |
| 5.2.14 | If the readings are within the acceptance criteria, affix the Calibration Status Label duly signed by the responsible person or external party (in case of outsource calibration). | |
| 5.2.15 | If the reading is outside the acceptance criteria refer the manufacturer’s handbook or replace gauge as required. | |
| Documentation | ||
| 5.2.16 | Record the details of calibration in Annexure. | |
| 5.2.17 | If calibration activity is outsourced, the observations are to be transcribed in the Annexure, calibration certificate and pertinent data to be attached. | |
| Action plan during Breakdown of Magnehelic Gauge | ||
| 5.2.18 | If any breakdown occurs, inform the Head of the Department and Quality Assurance Department immediately. Put the tag “Equipment Under Maintenance, Do Not Start” and inform to Service Engineer for rectification. | |
- Abbreviation:
| Abbreviation | Expansion |
| SOP | Standard Operating Procedure |
| QAD | Quality Assurance Department |
| EGD | Engineering Department |
| UTL | Utility |
*Note – Ready to use SOP available in “DOWNLOAD” Section.