Hach A1000 Basis Bedienungsanleitung Seite 20

Figure 18 Sample flow and connections
1 Process pipe
2 Isolation valve
3 Compression fitting, ¼-in. tube x ¼-
in. MNPT
Plumb the drain
D A N G E R
Potential Electrical shock and fire hazards. The drain line must be
connected to a drain system that is at ambient pressure.
N O T I C E
Tighten a new ferrule 1¼ turns the first time it is tightened. Then, only tighten the
ferrule 1/8 turn to make a connection. Do not tighten the fittings more as this may
cause damage to the fittings or ferrules and cause leaks.
Items to collect:
20 English
4 Drain
5 Drain tubing
6 Sample tubing
• 3/4-in. open-end wrench
• 9/16-in. open-end wrench
1. Plumb the drain tubing to the drain (WATER OUT) port. Refer to
Figure 17 on page 19.
2. Connect the other end of the drain tubing to a drain system that is at
ambient pressure. Do not connect the drain line to another line to
prevent backpressure and damage to the analyzer.
Do a leak test
N O T I C E
Tighten the ferrule only another 1/8 turn to stop a leak. Do not tighten the fittings
more as this may cause damage to the fittings or ferrules and cause leaks.
1. Slowly open the upstream isolation valve to let water flow to the
analyzer.
2. Open and close the upstream isolation valve several times.
3. Examine the plumbing connections for leaks.
4. If a leak is found, slowly tighten the compression fittings to stop the
leak.
User interface and navigation
User interface
Figure 19 shows the controller display, LEDs and keypad. The controller
is a stand-alone unit or an integral component of the analyzer.
gives the function of each key on the keypad.
The eight channel LEDs show the alarm status of the analyzers
connected to the controller. When the controller identifies that an alarm
has occurred on an analyzer, the channel LED for the analyzer changes
from green to red and starts flashing.
Table 5