Measurement
pH & EC Meter Calibration Log
Document instrument identity, standards, calibration checks, cleaning, and failures so measurements remain traceable.
Instrument
Meter ID
Probe ID
Model
Location
Owner / operator
Calibration
Date
Standard / buffer lot
Standard value
Observed value before calibration
Observed value after calibration
Temperature
Maintenance
Probe cleaned
Storage solution checked
Damage observed
Battery / power
Notes
Disposition
Passed
Recalibrated
Removed from service
Replacement date
Verified by