Figure 11 Pump on and off times at 50 °C (122 ºF)1 Time (in minutes) that the pump must stay off 3 Example: if the pump is on continuously for5 minutes, the pump must stay off for 15 minutes.2 Time (in minutes) that the pump is on continuouslyClose the coverTo close the cover, align the latch plates as shown in Figure 12 and close the latches.Figure 12 Latch plates alignmentSet the power to onPush the power button to set the power to on or off. Make sure that the power supply (AC power orbattery power) is correctly installed.User interface and navigationThe controller keypad is shown in Figure 13. Use the MENU key to set up sampling programs,configure the controller settings or complete the diagnostic tests. Use the arrows, ENTER and BACKkeys to scroll through the menu, make selections and enter values. Look for arrows on the bottom orside of the display screen to know when more options are available.16 English