Hach QC8500 Series 2, User Manual

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Operation
4.9.1 Reagent pump shutdown procedure
To shutdown the RP-150 reagent pump:
1. Press the
MANUAL RUN/ STOP
button to stop the pump. Turn off the green power
switch or turn off the power strip.
2. Release all of the cartridges. If the pump tubes are clamped down for more than a
few minutes, it causes the tubing to become flat and may require replacement. To
release the cartridges, press on the cartridge holder until the pump tube cartridge is
released. The pump tube can be left on the cartridges. The tension lever has no
effect on the pump tube when the cartridge is not clamped down.
4.9.2 Reagent pump maintenance
The Reagent Pump RP-150 Series does not require any special maintenance. When
operated according to the guidelines stated in this manual, the tubing is the only part that
needs replacement, depending on the application and the operating conditions. Use only
the manufacturer’s tubing for optimal performance.
If a spill occurs, neutralize it immediately. Clean the pump and cartridges well. Use
isopropyl alcohol to clean the rollers. Do not lubricate the rollers with oil. Keep all pump
surfaces clean and dry.
4.10 Temperature controller
All heater properties, including the run temperature (set-point), when to send the set-point
to the heater element and post-run set-point, are set in the Omnion 3.0 software. Refer to
the Omnion 3.0 User Guide for more information. The temperature can be viewed
real-time with the controller on the heater assembly.
Note: Always set the run and post-run temperature in the Omnion software.
4.11 Dilutor setup
For systems that use the PDS200 dilutor, make sure to place the diluent line in the diluent
(usually deionized water). Remember that all triggered dilutions will be performed at the
end of the tray run. All requested dilutions will be performed at the time the sample is in
the tray run sequence.
Triggered dilutions: The instrument recognizes any sample that is over the
concentration range of the method. It allows 10% of the high standard concentration for
extrapolation. The instrument automatically dilutes all over-range samples. This feature
must be specified in the analyte table in the Omnion software.
Requested dilutions: Program the dilution factor for a specific sample. This factor is
specified in the Run Worksheet. Refer to the Omnion 3.0 User Guide for
more information.
Note: Requested dilutions could be used to make calibration standards from a stock standard. Make
sure the tray includes all the calibration standards. Specify the same cup number for all of them (e.g.
cup 15). Place the stock standard in that cup (e.g., 15). Indicate the dilution factor for each
calibration standard accordingly.
The dilutor system needs an empty tubes rack to perform dilutions. The ASX-500 series
sampler has the fourth rack reserved for empty tubes.