Date of Calibration: ___________________ Technician: _____________________________________
Instrument Serial Number:______________ Software Revision:______________ Cable Model Number:________________
Temperature Reading__________________ Temperature Accurate: Y N
DO Sensor in use: Polarographic Galvanic Sensor notated in Sensor menu? Y N
DO membrane changed? Y N Color of Membrane_____________ Color notated in Sensor menu? Y N
Record the following calibration values:
Pre Cal After Cal
Conductivity ______________ _____________
ORP ______________ _____________
DO ______________ _____________ True Barometric Pressure at time of calibration ___________________
Pre Cal
pH 7 ______________ pH mV value___________ Range 0 mV +
50 mV
pH 4 ______________ pH mV value___________ Range +165 to +180 from 7 buffer mV value
pH 10 ______________ pH mV value___________ Range -165 to -180 from 7 buffer mV value
NOTE: See pH Cal tips section for additional information. Span between pH 4 and 7 and 7 and 10 mV values should be ≈ 165 to
180 mV. 177 is the ideal distance or 59 mV per pH unit.
Ammonium
1
st
point (1 mg/L) _________ NH4 mV value_______ Range: 0 mV +/- 20 mV (new sensor only)
2
nd
point (100 mg/L)________ NH4 mV value_______ Range: 90 to 130 mV > 1 mg/L mV value
Nitrate
1
st
point (1 mg/L) __________ NO3 mV value_______ Range: 200 mV +/- 20 mV (new sensor only)
2
nd
point (100 mg/L)________ NO3 mV value_______ Range: 90 to 130 mV < 1 mg/L mV value
Chloride
1
st
point (10 mg/L) _________ Cl mV value _______ Range: 225 mV +/- 20 mV (new sensor only)
2
nd
point (1000mg/L)________ Cl mV value _______ Range: 80 to 130 < 10 mg/L mV value
Record the following diagnostic numbers after
calibration, by viewing the .glp file and reading the values for the day’s calibration
Conductivity Cal Cell Constant ____________ Range 5.0 +/- 1.0 acceptable
DO Sensor Value (uA) ____________ (Membrane dependent, see DO Cal Tips)
pH Slope ____________ (≈ 55 to 60 mV/pH, 59 ideal)
pH Slope % of ideal ____________
2
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