Manual Graupner Ultramat 17 (page 17 of 33) (English, German, French)

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12. Pb (lead-acid) programs

This program is designed for charging and discharging lead - sulphuric acid and lead-gel batteries with

nominal voltages of

exactly 2, 6, 12 and 24 V (1, 3, 6 and 12 cells). Caution: the charger will not recognise

lead-acid batteries with other nominal voltages, and such batteries must not be connected.

Lead-acid batteries behave entirely differently from NiCd and NiMH batteries. Lead-acid batteries can only

deliver relatively low currents relative to their capacity, and similar restrictions very definitely apply to

charging. Manufacturers usually state 14 to 16 hours for achieving nominal capacity when recharging at

the normal charge current. The “normal” charge current is defined as one tenth of the battery’s nominal

capacity. Example: battery capacity = 12 Ah —> normal charge current = 1.2 A. In contrast to NiCd and

NiMH batteries, lead-acid chargers generally monitor the battery’s voltage in order to decide when it is fully

charged.

Caution: lead-acid batteries cannot and must not be fast-charged! Always select the charge current

which the battery manufacturer recommends. Please also bear in mind that the nominal capacity (i.e.

useful life) of a lead-acid battery is very quickly compromised by incorrect handling, including overcharging,

repeated 100% discharges and, in particular, deep discharging. The magnitude of the charge / discharge

currents used is also crucial to the actual battery capacity which can be exploited, i.e. the higher the

current, the lower the capacity which can be exploited.

The values selected in the user settings for charge termination delay and safety timer have no effect in the

Pb charge programs.

Pb manual program

The battery can then be connected to the charger and the charge process started: the unit starts charging

at 0.00 A and slowly raises the current until it reaches the set limit.

The charger constantly assesses the state of the battery during the charge process, and adjusts the

charge current to suit its condition. The charge program automatically determines the number of cells (cell

count) in the battery by measuring its overall voltage.

Please do not be surprised if the charger does not deliver the charge current you have selected. The

charge program constantly monitors the battery’s voltage, and thereby limits the current in order to prevent

excessive gassing of the battery.

MODE MODE MODE MODE

AUTOMATIC-

program

MANUAL-

program

discharge

program

capacity test-

program

trickle

charge

MODE

Pb automatic program

___________ _____

Pb automatic

C:2.5A limited

DECINC

In this program the charger detects the types of battery

connected and adjusts the charge current accordingly, to

avoid overcharging the pack.

The maximum charge current can be set using the INC /

DEC buttons

before you connect the battery to be charged.

The charge process is terminated according to the values

set by the user for „NiCd Delta-Peak Termination Voltage“,

„Charge Termination Delay“ and „Safety Timer“.

Lithium discharge program

Lithium capacity test program

Lithium battery cell count

When you connect the battery to the charger and press the

START button, the screen displays the number of Lithium

cells. If the pack consists of 1 - 3 cells, the cell count occurs

completely automatically.

With more than 3 cells you may have to adjust the number of

cells manually using the INC/DEC buttons, as the charger

cannot reliably detect the cell count above 4 cells. In this

case the „4 cells“ display will flash. On the right-hand side of

the screen you will see the voltage of the connected battery;

this allows you to check the cell count.

Press the START button again to start the charge process.

This program determines the capacity of a Lithium battery

pack.Before actually starting the program it is essential to

check that the battery type is set correctly in the LiPo set-up

program; the settings must be adjusted if necessary.

The program initially charges the pack at the set charge

current relative to its capacity (0 … 9900 mAh), which is

shown on the left of the screen, and then discharges it at

the set discharge current (0.1 … 3.0 A) shown on the right

of the screen.The screen then displays the discharged

battery capacity.To obtain a sensible capacity display the

discharge current should be set no higher than 500 mA per

1000 mAh of battery capacity.

Note also that the set discharge current must not exceed the

maximum discharge current stated by the battery

manufacturer.Please bear in mind that excessive discharge

currents will damage the battery, and will also give a false

capacity display.

This program is designed to determine the residual capacity

of a lithium battery which is not completely discharged.

In this program the unit discharges the battery using the set

discharge current (0.1 … 3.0 A, left of screen) until it

reaches the set final discharge voltage (2.5 … 3.7 V per cell,

right of screen).

The final discharge voltage cannot be set to a value below

2.5 V per cell, as this would cause damage to the battery.

___________ _____

LiPo discharge

2.5A 2.5V/Cell

DECINC

DEC

INC

ENTER

___________ _____

LiPo capacity

C:2500mAh D:2.5A

DEC

INC

DEC

INC

ENTER

___________ _____

***LiPo cells**

4cells (15.30V

)

DEC

INC

Lithium type select program

___________ _____

Lithium Type

LiPo

INC

DEC

This is the most important set-up program for Lithium

batteries.In this select program you set the appropriate

battery type.This setting must be made and checked

carefully, as the charger derives all the other charge

parameters from these settings.

Setting the battery type (LiPo or LiIo) affects the charge

termination voltage. If you find that a Lithium battery has

been unexpectedly charged up to only 2/3 of full capacity,

you may have set the wrong battery type at this point.

Caution: if you set an incorrect value here, the battery may

be irreparably damaged, and could even explode!

! Caution ! Please take great care

to set the correct number of cells,

otherwise the pack may explode

and go up in flames!

___________ _____

Pb manual

C:2.5A

DECINC

In this program you can set the maximum permissible charge

current using the INC / DEC buttons, but only

before you

connect the lead-acid battery for charging. This setting only

determines the top limit which the charger is

permitted to feed

to the battery. If the battery manufacturer states a low maxi-

mum charge current, then it is important to limit the charge

current to that value to avoid the charger setting a higher

current if the battery appears to be willing to accept charge.

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