Hanna Instruments HI 4101, Instruction Manual, Page: 18 / 20

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XV. XV.
XV. XV. XV. Storage and Care of the HI 4101 sensor
Storage and Care of the HI 4101 sensor
Storage and Care of the HI 4101 sensor Storage and Care of the HI 4101 sensor Storage and Care of the HI 4101 sensor
The HI 4101 sensor can be stored assembled and ready to
use in HI 4001-45 Conditioning solution overnight or
between measurements. After overnight storage, gently pull
on the cable to compress the spring mechanism thus
permitting electrolyte to exchange from the bulk to the thin
film between the membrane and glass. Calibration is
required after doing this.
For longer term storage (over a week), disassemble the
sensor completely and rinse off the internal pH/reference
assembly, the outer body and the membrane cap. Discard
the white PTFE membrane. (Note: keep black membrane
cap). Cover the glass tip with the protective shipping cap
and store parts securely in the original shipping box. When
reassembling the sensor follow section IX.
XVI. XVI.
XVI. XVI. XVI. Conversion T
Conversion T
Conversion T Conversion T Conversion Tables
ables
ables ables ables
For NH For NH For NH For NH For NH
33333
Multiply by Multiply by Multiply by Multiply by Multiply by
Moles/L (M) NH
3
to ppm NH
3
(mg/L) 1.70 X 10
4
ppm NH
3
(mg/L) to M (Moles/L) 5.882 X 10
-5
For N-NH3 (ppm as nitrogen) For N-NH3 (ppm as nitrogen)
For N-NH3 (ppm as nitrogen) For N-NH3 (ppm as nitrogen) For N-NH3 (ppm as nitrogen)
Multiply by Multiply by
Multiply by Multiply by Multiply by
Moles/L (M) NH
3
to ppm N-NH
3
(mg/L) 1.40 X 10
4