DIP Switches S-1
High and Low Alarm
Std. and ZERO
Control Trimmers
Master and Mixer
Switch
Figure 33
Figure 31
Figure 32
Sample Tubing Placement
Sample Overflowing
Preparing System for Calibration
1. Check to make sure that the buffer feed tubing is in the fresh vinegar bottle and at the bottom.
2. See
Figure 31
(below) to be sure sample tubing is placed in the weir properly.
3. Start water sample flowing at the recommended rate of approximately 500 ml (1 pint) per minute.
Water must be flowing over the sample flow cell’s fixed overflow weir and through the sample
drain hose on the right-hand side of the block.
Even more important is to make sure that water is flowing from the sample cell drain on the left hand
side of the block. Minimum flow should be about 130 ml/min.
4. Locate the master switch and mixer switch, and set both switches to the on (up) position (
Figure
33
, below).
5. Allow 2 full hours for the cell to stabilize (field burn-in). If the analyzer has not responded after
2 hours of operation, shock the sample flow cell by pouring 1 ml of household bleach into the
sample water in the overflow weir. Then allow 30 minutes for the analyzer to stabilize. When
adding bleach, the display should move up.
CAUTION:
Insufficient flow from the sample cell drain indicates that either the flow is set too low or
there is an internal flow blockage to the sample cell. Insufficient water flow can cause the positive
electrode to overheat and become permanently damaged.
Startup
25
FX-1000p
