126
Batteries and Chargers
Maintenance
Nickel-cadmium cells are sealed. They contain no free electrolyte, and in most cases
require no service or maintenance other than recharging.
Charging
Charge new nickel-cadmium batteries prior to use due to their self-discharge rate.
Nickel-cadmium cells are designed to be fully charged using a Hach Company
nickel-cadmium battery charger within 14 to 16 hours. Do not exceed 16 hours or you
may damage or shorten the life of the battery. The charge rate is 400 mA dc. The L.E.D.
indicator is on continuously when charging a nickel cadmium battery.
Storage
At room temperature, the self discharge rate of nickel-cadmium batteries can be as high
as 2% per day. When charged cells have been stored for a long period of time, or at an
elevated temperature, a change starts to take place in the negative electrode. The
structure changes so that it is less reactive than a fresh cell. This structure will return to
normal after one or two charge/discharge cycles. Batteries which have been stored for
extended periods of time (longer than 1 week) should be fully charged prior to use.
Nickel-cadmium cells can be stored for extended periods of time, in either a charged or
discharged condition, without significant degradation in their performance (
However, after long storage periods, the battery pack may require a few charge/discharge
cycles to restore its full capacity.
F.3 Alkaline Lantern Battery Pack
The Alkaline Lantern Battery Pack (P/N 3893) allows customers who are doing long-term
flow studies or multi-site flow studies to use a disposable battery instead of a
rechargeable battery. This allows you to log data for extended periods of time without
having to check the battery or replace it with a charged one. The battery pack offers
extended operating periods when used in conjunction with 950 Flow Meters.
Maintenance
The Alkaline Lantern Battery Pack requires little to no maintenance because it is not
rechargeable and it is completely sealed and watertight. The only maintenance required
is to replace the internal Alkaline Lantern Batteries when they expire. Keep the sealing
gasket in the channel along the top of the battery base clean and clear of any debris that
may prevent a good seal between the lid and the case.
Charging
Under no circumstances should the Alkaline Lantern Battery Pack be charged. There are
no provisions for charging the battery pack and doing so will result in damage to the
battery pack and possible injury to the user.
Proper Selection of Batteries
The proper selection of batteries for the Alkaline Lantern Power Pack is very important.
The recommended battery for the battery box is the Eveready
®
Energizer
®
Model
Number EN529. This is an industrial grade, alkaline lantern battery with spring terminals.
Table 50 Nickel-Cadmium Battery Storage Recommendations
Storage Temperature
Maximum Recommended
Storage Time
20 to 30 °C
9 months
30 to 40 °C
5 months
over 40 °C
3 months
Содержание Sigma 950
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Страница 20: ...18 Introduction...
Страница 34: ...32 Basic Programming Setup...
Страница 50: ...48 Sensor Installation...
Страница 82: ...80 Maintenance...
Страница 83: ...81 Appendix A Program Flow Charts Figure 22 Overview of Basic Program Menus...
Страница 84: ...82 Program Flow Charts Figure 23 Setup Flow Chart...
Страница 85: ...83 Program Flow Charts Figure 24 Options Flow Chart...
Страница 86: ...84 Program Flow Charts Figure 25 Alarms Menus Flow Chart...
Страница 87: ...85 Program Flow Charts Figure 26 Calibration Menus Flow Chart Page 1...
Страница 88: ...86 Program Flow Charts...
Страница 102: ...100 Programming Features...
Страница 106: ...104 Primary Devices Head Measurement Locations...
Страница 126: ...124 SCADA Modbus System Guidelines...