Appendix C Batteries And Chargers - Hach 911 User Manual

Appendix C Batteries and Chargers

C.1 Lead-Acid (Gel Cell) Batteries for 911 Flow Meter
DANGER
Never install, remove or charge batteries in a hazardous location.
DANGER
Vous ne devez jamais installer, retirer ou recharger les batteries dans un
environnement dangereux.
The manufacturer's lead-acid batteries are designed to prevent electrolyte leakage from
the terminals or case. The electrolyte is suspended in a gel, which ensures safe, efficient
operation in any position. Gel cells are classified as "Non-Spillable" and meet all
requirements of the International Air Transport Association.
Maintenance
The manufacturer's lead-acid batteries are maintenance-free.
DANGER
The use of chargers other than those provided by the manufacturer for use with
these batteries is not recommended and may damage the battery or shorten its life.
DANGER
Il est déconseillé d'utiliser des chargeurs autres que ceux fournis par le fabricant
pour ces batteries, car ils risquent de les endommager et de réduire leur vie utile.
Charge
The manufacturer's lead-acid cells are designed to be fully charged in 22 to 24 hours
using their lead-acid battery charger. Do not exceed 24 hours or life of the battery may be
damaged or shortened. The charge rate is 500 mA dc. The LED is lit, indicating the battery
is charging. The battery is fully charged when the LED indicator turns off.
Temperature
At higher temperatures, the electrical capacity that can be taken out of a battery increases.
At lower temperatures, the electrical capacity that can be taken out of a battery decreases.
However, excessive heat ruins batteries. Avoid placing batteries near heat sources of any
kind. To maximize battery life, operate the battery at an ambient temperature of 20 °C (70
°F). The permissible operating temperature range is -15 to 50 °C (5 to 120 °F), however,
use in the 5 to 35 °C (47 to 95 °F) temperature range is recommended.
Disposal
• 911 Flow Meter: The battery pack assembly for the 911 Flow Meters are
rechargeable/disposable. Follow local applicable disposal guidelines for
gel–electrolyte type batteries. The entire battery housing is meant to be disposed
of after the service life of the battery. Do not attempt to open the case to gain
access to the batteries, there are no user serviceable parts inside.
Storage
Store lead-acid batteries in a cool, dry place. Their low self-discharge rate and excellent
charging characteristics permit storage for up to one year without loss of efficiency or
appreciable deterioration of battery performance.
At room temperature the self-discharge rate of lead-acid batteries is approximately 3% of
rated capacity per month. The self-discharge rate varies as a function of ambient storage
temperature.
Figure 51 shows the storage self-discharge characteristics of lead-acid batteries at
various ambient temperatures.
batteries.
Table 12 shows recommended storage times for lead-acid
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