calibration frequencies
DESCRIPTION
Calibration Frequencies in labTRANSCRIPT
Checking/calibration frequencies
Item Calibration / check
Description Minimumfrequency
Calibrate Check/ Verify
Std form/Method
Vernier 2 years Approved external lab
Standard weights(this is an statutory requirement)
Every year Weight & measure deptt
Perforated steel sieves (aggregate) 1 year FT12
Working woven mesh sieves (sand) 1 year FT13
Master sieves - woven mesh 3 years Approved external lab
Flakiness gauge 1 year FT16
Elongation Gauge 1 year FT15
Density containers 1 year FT23
pH meter 1 year Approved external lab
Cube moulds 3 months FT5
Cube testing machine, loading rate 6 months Approved external lab
Slump cones / tamping rod 3 months FT4
Master thermometer 3 years Approved external lab
Working thermometer 1 year FT14
Square Gauge 1 years Approved external lab
Scale 1 year FT3 / External agency
Oven 1year External agency