Hach AMTAX sc Manual page 17

6.4 Scheduled maintenance
Table 4
ONLY. Contact the manufacturer for more information.
Description
Reagent pump for sc analyzer (Valve pumps)
Pump head piston pump 10 mL
(Pre-greased cylinder and piston)
Switchable Compressor 115/230V
Solenoid stirring bar
Electrode
6.5 Replace the membrane cap, electrolyte and electrode
Important note: Never lubricate the membrane cap or the electrode with grease, silicone
oil or Vaseline. This will cause damage to the Teflon membrane which will cause poor
performance.
Note: The service life of the Teflon membrane will be reduced by tensides or organic solvents in the
waste water.
For optimal performace, replace the the membrane cap, electrolyte and electrode
regularly (refer to
While operating the instrument, the amount of electrolyte should be between 4 mL and
11 mL. With less amount of electrolyte, the accuracy will be reduced for low measured
values in the related measuring range. To determine how much electrolyte remains in the
electrode body, refer to
Figure 1 Determine the electrolyte volume in the electrode body with a measuring tape
To replace the membrane cap and the electrolyte and/or electrode:
1. Select MAINTENANCE>TEST/MAINTENANCE>MEMBRANCE REPLACEMENT.
English
lists items, except the electrode, that need to be maintained by service personnel
Table 4Repair maintenance items
Check continuously after 1 year.
Electrode is OK, when slope
with new membrane cap and
electrolyte is in the range of
–57 to –67 mV after 24 h of
membrane cap replacement.
Table 3 on page
Figure 1.
When to replace
1 year
1 year
2 years recommended
1 year
16).
Maintenance
Warranty
1 year
1 year
2 years
1 year
1 year
17