Mettler Toledo Pt4805-S7 Manual De Instrucciones página 16

en
16
Industry: Observe instructions for housing
h
Important
– S urface of reference electrolyte higher than surface of
measured medium
– D iaphragm must be immersed
General
– O bserve instructions for pH / mV meter or transmitter
g Interpretation of measurement:
T he reading on the pH / mV meter or transmitter depends on
the reference system used.
Conversion to redox voltage related to standard hydrogen elec-
trode (SHE)
E = E + E
H
E =
E = Standard voltage of reference electrode (correction)
H
E = Redox voltage rel. to SHE
ref
Table 1
Reference
electrolyte
E [mV] at
ref
25 °C
Note: With changes of temperature, E
reference system.
3 Maintenance
3.1 Reference electrolyte
h D iscoloration precipitates: suck electrolyte by siphon and
refill.
i L evel must be at least 2 cm below filler inlet: refill up to
max. 1 cm below filler inlet.
3.2 Metal
k C lean and remove deposits with toothpaste or 2 mol / l HCl.
l R inse with distilled water.
k
l
3.3 Diaphragm
C lean diaphragm with appropriate solution
Table 2
Nature of deposit
Proteins
CaCO
Silver sulphide Ag
Oil, grease
Storage
m I n reference electrolyte, in 3 mol / l KCl or Friscolyt.
Do not store electrode in distilled water or deionized water!
Redox Electrodes
59 906 023 D
ref
Instrument reading
3 mol / l KCl
207.0
3
S Diaphragm cleaner
2
Friscolyt™
207.0
ref
Cleaning agent
Pepsin / HCl
Dilute HCL
Acetone or ethanol
© 04 / 2023 METTLER TOLEDO
Redox Electrodes
Viscolyt™
207.0
varies differently for each
Order No.
51 340 068
51 340 70
Printed in Switzerland
k