CALIBRATION OF GAUGES



SCHEDULE FOR CALIBRATION OF VARIOUS GAUGES

AND TESTING EQUIPMENTS IN THE CONCRETE SLEEPER PLANT

S.No. Equipment Frequency
1 15 cm concrete cube testing machine (2000 KN capacity) Once in 3 months
2 Cement mortar cube testing machine (500 KN capacity) Once in 6 months
3 Sleeper Static Bend Test Machine (500 KN capacity) Once in 3 months or after testing 250 sleepers, whichever is earlier.
4 Pre tensioning Jacks (500 KN capacity) Once a month or after casting 5000 sleepers whichever is earlier.
5 Pre-tensioning load cell -do-
6 Concrete Beam Testing Machine (100 KN capacity) Once in 6 months
7 Aggregate weight batcher Once every week or after casting 2000 sleepers, whichever is earlier.
8 Cement weighing equipment -do-
9 Water Meter -do-
10 Master gauges for checking correctness of dimension measuring Gauges Once in 6 months
11 Dimension checking gauges Once every 15 days or after inspecting 5000 sleepers, whichever is earlier
12 Proving rings (2000 KN, 500 KN and 100 KN capacity) Once in 18 months
13 Weights & Measures Once in two years by Weights & Measures Department
14 Tachometer Once a year
 

Note:

1. The items referred at S.No.1 to 6 above should be calibrated by proving rings in the sleeper plant itself.

2. The items referred at S.No.7 & 8 should be calibrated by dead weights and item at S.No.9 by measuring cans which should be available in the plant.

3. The proving rings should be got calibrated from a reputed organization like the IITs, NCCBM or NPL etc.

4. The record of calibration of all the above equipments should be maintained in a manner that previous records can be easily connected. 5. The calibration can be done more frequently at the discretion of the Inspecting Official.

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