15
Thermo Scientific Orion Star A213 Benchtop and Star A223 and Star A323 Portable RDO/DO Meter Reference Guide
Chapter 4 RDO/DO Calibration
1PMBSPHSBQIJD%0QSPCFTPOMZ"QPMBSPHSBQIJD%0QSPCFNVTUCFQPMBSJ[FE5IFQSPCFJTDPOUJOVPVTMZQPMBSJ[FEXIFO
JUJTDPOOFDUFEUPUIFNFUFS*GUIFQSPCFJTOPUDPOOFDUFEUPUIFNFUFSDPOOFDUUIFQSPCFUPUIFNFUFSDPOOFDUUIF
NFUFSUPBQPXFSTPVSDFBOEXBJUUPNJOVUFTGPSQPMBSJ[BUJPO
5IF0SJPO4UBS"BOE4UBS"NFUFSTDBOQFSGPSNBDBMJCSBUJPOVTJOHXBUFSTBUVSBUFEBJS "JSBJSTBUVSBUFE
XBUFS 8BUFS8JOLMFSUJUSBUJPO .BOVBMPS[FSPQPJOUDBMJCSBUJPO 4FU;FSP4UFQCZTUFQJOTUSVDUJPOTBOEQSPNQUT
BSFEJTQMBZFEPOUIFNFUFSUPBTTJTUPQFSBUPSTXJUIUIFDBMJCSBUJPONFOVT5IFNFUFSDBOTBWFVQUPDBMJCSBUJPOTJO
the log and calibration data can be exported from the meter to a printer or computer.
Air Dissolved Oxygen Calibration
"OBJSDBMJCSBUJPOJTQFSGPSNFEJOXBUFSTBUVSBUFEBJSVTJOHUIFDBMJCSBUJPOTMFFWFJODMVEFEXJUIUIF%0QSPCF
5IJTJTUIFTJNQMFTUBOENPTUBDDVSBUFDBMJCSBUJPO%VFUPUIFJOIFSFOUEJGGFSFODFTCFUXFFOXBUFSTBUVSBUFEBJS
BOEBJSTBUVSBUFEXBUFSTBUVSBUJPOXJMMCFEJTQMBZFEXIFOUIFDBMJCSBUJPOSFBEJOHJTTUBCMFXIFOVTJOHB
polarographic DO probe. The highest possible accuracy is reached when calibration temperature is the same as the
measuring temperature. Moisten the sponge or absorbent cloth in the calibration sleeve with distilled water and insert
the probe into the sleeve without touching the water saturated material. For BOD measurements, this calibration can
be performed in a BOD bottle.
Note: In most calibration screens, press
f1 (esc)
to return to the measurement mode without saving the calibration.
*OUIFNFBTVSFNFOUNPEFQSFTT
f1 (cal)
.
2. Press
or
to highlight
Air
and press
f3 (select)
.
3JOTFUIF3%0PQUJDBM%0QSPCFPSQPMBSPHSBQIJD%0QSPCFXJUIEJTUJMMFEXBUFSCMPUESZXJUIBMJOUGSFFUJTTVFBOEQMBDF
JOUPUIFQSFQBSFEDBMJCSBUJPOTMFFWFPS#0%CPUUMF"MMPXUIFQSPCFBOEXBUFSTBUVSBUFEBJSUPSFBDIFRVJMJCSJVN
8IFOUIFQSPCFBOEXBUFSTBUVSBUFEBJSBSFSFBEZQSFTT
f3 (start)
.
8BJUGPSUIFEJTTPMWFEPYZHFOSFBEJOHPOUIFNFUFSUPTUBCJMJ[FBOETUPQnBTIJOH0ODFUIFSFBEJOHJTTUBCMFUIF
meter will display
Reading is stable. Accept Auto Calibration Value
and
100.0%
if using an RDO optical DO probe or
102.3 %
if using a polarographic DO probe.
1SFTT
f3 (cal done)
to export the data to the calibration log or press
f2 (print)
to export the data to the calibration
log and a printer or computer. The meter will proceed to the measurement mode.
