Hach QC8500 Series 2 - Pump Operation

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Operation
4.9 Pump operation
To use new pump tubes for the first time, allow the pump to run approximately ten
minutes in order to obtain constant flow rates. Table 8 shows the functions of each button
on the pump.
Place all of the reagent lines into their corresponding containers or in deionized water. To
avoid reagents leaking on the system, run deionized water through all of the lines to
detect any leaks. If the manifold has a cadmium column, make sure it is bypassed. Water
and air will damage the cadmium column.
Note: Some methods require certain reagents to be pumped first. For example, the TKN method
has a buffer solution that has to be run first to avoid a white precipitate in the manifold tubing. Check
the QuikChem method for instructions.
Refer to section 3.2.3 on page 18 to learn how to mount the cartridges on the
reagent pump.
Table 8 RP-150 pump button functions
Button Function
MIN Sets the pump speed to 4.
MAX
Sets speed to maximum of 999. Button must be kept depressed in order to maintain
maximum speed.
Note: If this button is depressed too long the pump will stop to prevent the motor burning out.
NORMAL RUN
Normal run starts the pump and permits remote control of the pump standby speed as determined
by the Omnion software at the end of a run or batch. The pump runs at the displayed speed.
Normal speed is 35. Use the
UP and DOWN arrows to alter this setting.
If Omnion is set to Standby speed, the pump will run very slowly and the display will show rc 3.
The display rc 3 indicates remote control speed 3.
MANUAL RUN / STOP
Manual running allows the pump to override the remote control of the standby speed.
This button toggles between manual speed control and manual stop.
If the pump is running, this button will always stop the pump. If the pump is not running, this button
will still override the remote control from the computer and put the pump in manual stop.
The
MANUAL RUN button is commonly used for making the pump go to normal speed in order to
prime the tubing with reagents.
UP arrow Increases pump speed setting. Not active when in MIN or MAX modes.
DOWN arrow Decreases pump speed setting. Not active when in MIN or MAX modes.