Eureka MANTA+ - Calibration Record (Cal Log)

Eureka Manta Manual Page 28 of 67
Sensor Standard Method of Calibration Available Calibration Solutions Comments
Reference Electrode calibration not required N/A replace pH electrolyte
solution at routine
calibration
Depth adjust for barometric pressure N/A recalibrate at deployment
site for best accuracy
Turbidity 2 points 0 NTU, 10 NTU, 100 NTU, 400 NTU calibrate near expected
value
HDO (Optical DO) calibrate at 100% saturated
water
DI water -shake vigorously to
oxygenate
set BP before calibrating,
recal at deployment site
for best accuracy
Chlorophyll 2 points secondary solid or 40µg/L solution or
lab sample
Rhodamine 2 points secondary solid standard or
rhodamine
Blue Green Algae 2 points secondary solid standard
or lab
sample
Ammonium (NH4+) 2 points Lo 4.63 mg/l; Hi 46.3 mg/l
Nitrate (NO3+) 2 points Lo 4.62 mg/l; Hi 46.2 mg/l
Chloride (CL-) 2 points CD Standard 147 Micro S
CD Standard 1412 Micro S
enter 34.3 during
calibration for low
enter 319.3 mg/L for high
D.4 C
alibration Record (“Cal Log”)
Every Manta has a dedicated data file called CAL.LOG. The CAL.LOG records every calibration that your
instrument has accepted. In this file are the time and date of the calibration, the parameter calibrated,
the reading before the calibration was accepted, the reading after the calibration was accepted, the SRF,
and a few other details. If you wished to know, for instance, the last time that Conductivity was calibrated,
the Calibration Record would tell you when the most recent Conductivity calibration was accepted, the
value of the calibration standard, and the instrument’s reading in the standard before the calibration was
made (to tell you exactly how much the instrument was changed during calibration). This data cannot be
altered within the Manta, so don’t try any funny business.