Instrumentation Calibration and Testing Services

Instrumentation Division was originally established in 1965, which was expanded by creating Hydraulic Instrumentation Centre under UNDP aid in 1976, and the division is now known as HI division. Under Hydraulic Machinery and Cavitation division, Volumetric Calibration Laboratory was established in 1968 with UNDP aid. Current Meter Calibration facility was established in 1956 and upgraded in 2003 with the latest instrumentation.

Major activities undertaken by various technical divisions in this group are summarized below:

  • Instrumentation for collection of data on physical hydraulic models, such as current meters, water level recorders, various types of transducers, signal conditioners, multi- channel data acquisition systems, etc.
  • Instrumentation for field data collection on coastal parameters like water level, velocity, wave-height and period, temperature, salinity, depth of water, tides, tidal currents, waves, flow pattern, water samples, thermal mapping, beach samples, etc.
  • Computer controlled servo-hydraulic Random Sea Wave Generation (RSWG) systems for wave flumes and basins
  • Computer based electro-servo automatic tide generation (ATG) system for tidal models
  • Dam Instrumentation for measurement of tilt, settlement, deformations, pore- water pressures and uplift, internal stress, etc.
  • Collection and analysis of field data for waves, water levels, currents, temperature, salinity, bathymetry, water quality and sediment characteristics
  • Calibration of flow meters and evaluation of performance of valves
  • Performance evaluation and tests for voltage fluctuations on bore well pumps
  • Assessment of head loss across filters
  • Optimisation of pumping system design by water hammer analysis
  • Flow measurements for water auditing and assessing the performance of hydropower projects
  • Verifying the design of pump house chamber with reference to flow pattern, flow distribution, vortex, etc. and suggesting remedial measures
  • Servicing and Calibration of conventional rotating element type current meters like cup type, propeller type, pigmy cup, pigmy propeller types conforming to IS 13371/ ISO 3455
  • Calibration of sophisticated stationary element type electromagnetic and acoustic current meters



v Rating tank 228 m long, 3.66m wide and 2.13m deep
v Electrically driven rating trolley (carriage)
v Speed range 0.01 m/s to 6.0 m/s.

v AC servo motors and drives with PLC for precise speed control .

v PC based data acquisition and processing system using specially developed software .


v Evaluation of drag force / hull resistance on water bodies.
v Servicing and repairs of old current meters .
v Calibration of conventional rotating element type current meters (IS 13371/ ISO 3455) and sophisticated stationary element type viz self recording electromagnetic and ADCP,Contact free radar sensor etc.


Calibration of current meters in straight open tank (rating tank) is an internationally accepted practice. A new current meter is required to be calibrated so as to establish relationship between its rotational speed and the velocity of flow. Even for old current meter periodical calibration is necessary to account for possible wear and tear of its certain parts. As per IS 13371 it is mandatory to recalibrate the current meters at yearly interval or after 300 hrs of use whichever is earlier During calibration, the current meters are suspended from the carriage and drawn through still water containing in the tank at a number of steady speeds of the trolley. Simultaneous measurements of the speed of the trolley and the rate of revolution of rotor of the current meter are made. The two sets of values are related by one or more equations. The calibration of each current meter is provided in the form of Calibration Table suitable to gauging technique in use.

v Central Water Commission
v Central and State Government Departments
v Current meter manufacturers


The Hydraulic Machinery and Cavitation division has been in service to the nation since 1968. This division has an imprint on major Hydro Electric Power Plants in India for testing the prototype turbines for performance evaluation for periodic health monitoring , RMU , Life Extention(LE) studies.and flow measurement at sites. This division also undertakes calibration of closed conduit flow meters, Testing of Pumps, Hydraulic Model Testing of Pump intakes, CFD Studies for Pump Intakes, Hydraulic designs of pumping systems.
-Verification of hydraulic performance , Efficiency for Hydro Turbines as per IEC 60041 stipulations for RMU, RLA and LE Studies
-Flow Measurement using various methods as per IEC 60041( Current meters, Ultrasonic (Single/Dual path), Index method and others
Recommendation for RMU Works
Inspection inside the Turbine Scroll
Case for Flow Measurement Location
Clientele : State Hydro Power Generation Utilities such as MAHAGENCO (Koyna, Bhivpuri , Bhatghar,Veer, Ghatghar, Bhira,Tillari , Vaitarna), KSB( Sholayar, Peringalkuthu), OHPC(Hirakud, Chiplima) and many more.
National Hydro Power Agencies such as NEEPCO(Kopili), NHPC (Loktak, Salal, BhairaSiul),
Private Hydro Power Agencies : VOITH, TATA and etc.
RMU Tests for 3 X 35MW Loktak HEP , Manipur for NHPC
Site Investigation for Winter-Kennedy
type Flow Measurement
ii) Site testing of large VT & Centrifugal Pumps
• Hydraulic performance of Pumps
• Water Auditing by means of flow measurement and suitable recommendations.
Clientele : TATA, MKVDC Maharashtra and others
Flow Investigation on VT Pumps at Site, TATA Power,Trombay
Open Channel Flow Measurement for
RMU Works of 18MW Veer HEP
i) Gravimetric Facility :
Circuit Design : Conforms to ISO 4185
Maximum line size : 1200 mm NB
Maximum flow rate : 2.0〖 m〗^3/s
Uncertainty : +/- 0.25 %
Gravimetric system : 100 tonnes
Rated Head : 30mwc
Traceability : National Standards
Calibration of Electromagnetic Flow Meters at 2 Capacity Lab
ii) Volumetric Flow Calibration Facility
Maximum line size : 250 mm NB
Maximum flow rate : 0.25〖 m〗^3/s
Uncertainty : +/- 0.5 %
Traceability : National Standards
Head Loss Test for Heavy Duty Duplex Filter in Gravimetric Laboratory
iii) Head loss across Filters:
Filters of all sizes upto 1200MM are tested for headloss across it
Clientele : Manufacturers of Flow meters across India such as Forbes Marshall, Krone Marshall , ABB, Siemens, Endreuss Hauser and filters for Otoklin, Gujarat Otofilt, Flash Point and more.
• Flowmeters of types such as Electromagnetic, Ultrasonic or any other types are calibrated by secondary method using a pre-calibrated Ultrasonic Clamp-ON type flowmeter of 0.2 Class accuracy.
Clientele Flowmeter users such as NTPC, BHEL, Muncipal Corporations, Usha Martin, Hindalco and many more
Water Auditing at M/s Hindalco ,
Ranchi for Govt. of Jharkhand
Hydraulic Performance and overload tests on submersible and centrifugal pumps at Laboratories
Pump Test Facility
Hydraulic Performance Test of Submersible
Pump in Pump Test Rig
Maximum line size : 250 mm NB
Standard : IS 9137, 11346 and 325
Maximum flow rate : 0.25〖 m〗^3/s
Maximum head : 50 mwc
Maximum input Power for Pump Motors: 75 kW
Test voltage/ frequency range : 370-500 V, 50Hz/ 0~60Hz
Test uncertainty : + 0.5 %
Current / Power Measurement accuracy : 0.2/0.5 Class
Submersible pumps of Irrigation Department of UP, Rajasthan, Bihar and more for agriculture and water supply needs.
Centrifugal Pumps of private agencies and Public sector undertakings.
Solar Pumps of various Capacity
Pumping system design :
• Optimisation and Water hammer analysis
• Pump sump model studies for improvement of hydraulic conditions and remedial measures
i) Pump Intake Model Studies : Bhopal City Water Supply, MCGB, SAIL, MECON, NPCL, IGCAR,Talcher, Unchahar, Ramgundam, Khargone, Maithon, NathpaJhakri, Kathalguri, Takari, Mhaisal, Parli, Korba, Kota and many more
ii) Pumping System Design : Damodar Valley Corporation, SinnaMadha, Ambora, SAIL etc.
• CFD studies for pump intakes using Flow-3D software. Development of Numerical Models are validated with physical model studies for many Govt and Private agencies.
b) CONSTULTANCY STUDIES: Providing Technical assistance in Flowmeter & Pump selection and installation
c) Clientele: Agencies such as DVC, SAIL, NPCIL etc.