Hach CA610 User Manual page 12

Figure 7 Plumbing connections
1 Drain
2 Air gap
3 Tubing, 0.50 in. I.D. (customer-supplied)
4 Inlet
3.5 Air purge option
If the environment contains high humidity and/or caustic vapors, an air purge might be necessary.
This process maintains a positive pressure in the instrument with dry air. To connect an air supply:
1. Remove the plug in the quick connect fitting, refer to
2. Install the ¼-in. tubing and push until two distinct stops are felt.
3.6 Electrical connections for conduit
Electrocution hazard. Use only fittings that have the specified environmental enclosure rating. Obey the
requirements in the Specifications section.
12 English
5 Sample drain
6 Enclosure drain (must remain open)
7 Installation kit (5742000)
8 Sample in
Figure 1 on page 7.
D A N G E R