Hach FL900 Series, Basic User Manual

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Figure 2 Connectors—side 2
1 Sensor (FL904 only) 3 Antenna option (all but FL900)
2 Sensor (FL904 only) 4 Rain gauge (all but FL900)
Product components
If any items are missing or damaged, contact the manufacturer or a sales representative
immediately.
Apply power to the Logger
Install the batteries
W A R N I N G
Explosion hazard. Incorrect battery installation can cause the release of explosive gases. Be sure that
the batteries are of the same approved chemical type and are inserted in the correct orientation. Do not
mix new and used batteries.
W A R N I N G
Fire hazard. Battery substitution is not permitted. Use only alkaline batteries.
N O T I C E
Do not over-tighten the cover. Tighten until the cover just touches the O-ring, then tighten one-quarter to one-half
turn maximum from O-ring contact. Keep the O-ring lubricated with silicone grease.
The instrument can use two or four 6 V batteries for power. Use two batteries for short-term use or
four batteries for long-term use (for battery life, refer to
Specifications on page 3). When only two
batteries are used, put both batteries on the same side of the compartment (A-A or B-B). Refer to the
illustrated steps that follow.
Changes in temperature and pressure can cause the battery compartment cover to be difficult to
remove by hand. If this occurs, a tool can be used to remove the cover (
Figure 3 ).
English 9