HyQual Multi-probes User Manual v3, 08.07.2022
KISTERS Controlled, Template: Word-with-table-of-contents-Template-Company.docx, v1.1
Page 15 / 23
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 mg/l for low cal
enter 319.3 mg/l for high cal
7.3.4
Calibration Record (Cal Log)
Every HyQual probe has a dedicated data file called CAL.LOG. The CAL.LOG records every calibration
made to your instrument, whether you accepted the calibration or not. This file shows the time and date
of the calibration, the parameter calibrated, the reading before the calibration was accepted, the read-
ing after the calibration was accepted, the “raw” sensor reading, the SRF, and a few other details. If you
wish to know, for instance, the last time that DO was calibrated, the Calibration Record would tell you
when the most recent DO calibration was made, the value of the calibration standard, and the instru-
ment’s reading in the standard before the calibration was made (to tell you exactly how much the in-
strument was changed during calibration). Please notice that this data cannot be altered within the
HyQual probe!.
7.3.5
Temperature
The Temperature sensor is an electrical resistor (thermistor) whose resistance changes predictably with
temperature. The sensor is protected by a stainless-steel tube. Thermistors are very stable with time, so
are factory-calibrated and do not require recalibration.
7.3.6
Dissolved Oxygen
The optical dissolved-oxygen sensor is a blue-light source, a sensing surface, and a red-light receiver.
The sensing surface is an oxygen-active compound stabilized in an oxygen-permeable polymer, usually
silicone. When the sensing surface is exposed to oxygen (in water or air), oxygen diffuses into the sens-
