Hach FL1500, Basic User Manual

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Table 4 Sensor wiring (continued)
Signal US9000 pHD
2
BL9000
AV9000S
Flo-Dar
3
SVS
Flo-Tote 3
Junction box
for US9000
2 V – Blue Black Green Green Green Black
1 SRQ — — Blue — — —
Installation for Flo-Dar or Flo-Tote sensors
Install the air reference tube and external desiccant to make sure that the pressure transducer in the
sensor operates correctly. The desiccant cartridge prevents damage from moisture and debris.
Moisture and debris can decrease the accuracy of the Flo-Dar and Flo-Tote sensors.
If the instrument is installed in a high-moisture environment, install a desiccant cartridge.
1. Remove the plug from one of the air reference ports. Refer to Figure 9 .
Note: Do not remove the plugs from the air reference ports that are not used.
2. Push the air reference tube from the sensor into the air reference port.
Note: If the sensor cable is pulled through a conduit, protect the wiring and air tube from damage and
contamination.
3. Install an external desiccant cartridge on the air inlet port. Refer to Figure 9 and Accessories
on page 30.
Figure 9 Air reference tube and desiccant installation
1 Air inlet 3 Plugs—remove only for air reference tubes
2 Desiccant cartridge 4 Air reference tube from sensor
18 English