14
Sample Collection
I I
Operation
Here is an example of the use of the UP (faster) key:
Each of the 165 possible ID settings corresponds to a unique ID that is associated with CPM,
refill and discharge time values. For typical usage, only the UP/DOWN arrow keys are required
to set flow, and the ID number is provided for easy, direct return to past settings. Appendix 1
lists all possible ID settings and the default refill and discharge time settings for each CPM.
Appendix 1 also shows how the refill and discharge time will change within a CPM setting as
you press the UP or DOWN keys.
The PAUSE key ( ) is used to freeze the controller action to allow the user time to collect a
sample or carry out other steps that might be difficult if the controller continued to automatically
cycle and cause the pump to produce water. While the controller is cycling, pressing the PAUSE
key causes the controller to immediately enter the Hold state. Drive air is vented from the pump
(this is the pump refill cycle) and the pump fills and waits. Pressing the PAUSE key a second
time causes the controller to immediately enter the Sample state. Drive air is directed to the
pump causing the pump to discharge its volume of liquid. Bladder pumps typically hold 400-
500 ml of liquid, so use of the Hold and Sample states allow the full volume of the pump to be
discharged into a sample container. Pressing PAUSE once again returns the MP10UH to its
normal Automatic Cycling state. During Hold and Sample a HELD is displayed to remind you
that the controller is in a paused state. Figure 3 shows an example of the MP10UH in MP mode,
but HELD in the Sample state.
Note:
Pressing the Cycle key also freezes controller cycling. However, using the Cycle key rather
than the Pause key causes the startup screen to be displayed upon restart. Use of the Pause key
is recommended for typical operation.
ID
---
1
2
3
10.0
9.5
9.0
8.5
5.0
5.5
6.0
6.5
103
104
105
106
Key
Press
Refill
(sec)
Discharge
(sec)