Six And Twelve Month Service - Hach BioTector B7000 User Manual

10.2 Six and Twelve Month Service

Below procedure is a recommended check list for the 6 and 12 month service on the BioTector TOC TN
analyzers. Please note that any special models and applications may require additional service items. Service
procedures may be changed without notice due to the continuous research and development program.
Therefore, please refer to the service check list supplied with the service kit for most up to date information.
Service should only be carried out when "SYSTEM STOPPED" message is displayed on the top left
corner of the main Reaction Data screen or when the system is powered down. When "REMOTE
STANDBY" or "SYSTEM RUNNING" message is displayed on the screen, stop the BioTector using
the "Finish & Stop" or "Emergency Stop" function.
For system and personal safety, all reagent lines should be washed with water and then purged with
air before the service procedures are carried out. In order to wash the reagent lines, connect all
reagent tubes to a DI Water (or tap water) container. Go to Zero Calibration menu and activate "RUN
REAGENT PURGE" function to wash the reagent lines with water. When the reagent purge with
water is completed, remove the tubes from the water container and place them open to air. Using the
same menu, select the "RUN REAGENT PURGE" function one more time to purge the reagent lines
with air. As the system may still contain small traces of reagents after the reagent purge cycles, it is
strongly recommended to take the necessary safety precautions, such as wearing eye protection and
gloves throughout the service. In systems built with Cleaning Valve (MV3) and Oxidized Sample
Catch-pot/Cleaning Vessel, using the Simulate menu, activate Cleaning Valve and run Sample Pump
in reverse (REV) direction until all liquid inside the catch-pot is discharged.
Disconnect power to ozone destructor heater. The ozone destructor should
never be opened when it is hot as the threads may seize.
Replace the three 24V plug in relays on the Relay PCB, 81204001. The relay
type is OMRON G2R-2-SN (see item R in service kit).
Confirm the Sample (ARS) Valve is not leaking.
Check the rollers on the rotor of all peristaltic pumps manually and confirm that
they are rotating freely.
Replace the tubing element (6.4mm OD, 3.2mm ID EMPP 562 tubes) of the
WMM60 Sample Pump. The WMM60 replacement tubes are supplied in the
service kits with fittings already attached (see item D in service kit). The overall
length of the tube and fittings should be 205.5mm, the tube itself is 161.5mm.
If process conditions require this tube to be changed every 3 months,
additional tubes are supplied in the service kit.
Replace the 120mm long, 5.6mm OD, 2.4mm ID EMPP 562 tube in the Acid
and Base Pumps (see item E in service kit). Replace the pump tube rail for the
Acid and Base Pumps (see item B in service kit).
Replace the 6.9mm OD, 4.1mm ID EMPP 562 tubing used in the pinch valves
(see item AC in the service kit) and any PP (Poly-Propylene) Y fittings (see
item J in service kit) in the analyzer. If additional Y fittings are required they
should be ordered separately.
In TC - TIC systems, replace the 6.9mm OD, 3.2mm ID EMPP 562 tubing in
the pinch valve (see item AC in service kit) and the Y fitting (see item J in
service kit) above the TIC Reactor in the BioTector.
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6 M 12 M
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