Operating instructions

OPERATING THE AT10.1

Using Ground Detection in Charger Standby Mode

If you put the AT10.1 into standby mode by opening the dc circuit breaker

(CB2), the ground detection circuit will send an erroneous negative

ground alarm. There are two ways to work around this:

• Disable the ground detection circuit while the charger is in standby, as

described below.

• Put the charger into standby by opening the ac input circuit breaker

(CB1), and leaving the dc circuit breaker closed.

Operating the charger with the ac breaker (CB1) closed and the dc breaker

(CB2) open is an abnormal condition, and is not recommended.

Disabling the Ground Detection Alarm

You can disable the ground detection alarm circuit, and isolate the circuit

from chassis ground. If your battery is normally grounded, or you want to

defeat the alarm for any other reason, follow these steps:

• De-energize and lock out all ac and dc voltage sources to the AT10.1.

Check with a voltmeter before proceeding. This includes remote sense

wires if they were installed.

• Open the AT10.1 front panel, and locate jumper J5 at the top left of the

Control Circuit Board (shown on the previous page). Move the jumper to

the DISABLE position. The POS GND and NEG GND indicators and

the summary alarm relay will not respond to a ground fault.

Restart the AT10.1, following the instructions in Section 2.1.

2.3.5. Setting the current limit value

The AT10.1 automatically limits its dc output current in case of overload

or battery discharge. You can adjust the value of the current limit from

50% to 110% of rated current. The factory setting is 110%.

The current limit adjustment is the last step in the normal Edit sequence. If

the AT10.1 is not in the Edit mode, press the

EDIT/ENTER key five times,

until the meter display flashes the value of current limit, in Amperes. Press

and release the

UP or DOWN key to increase or decrease the value in the

display by one count, or press and hold the UP or DOWN key to scroll the

value in the display upward or downward. When the display shows the

current limit value that you want to set, release the

UP or DOWN key. If you

go past the number you want, press the UP or DOWN key again to reach the

number you want to set.

• Press the EDIT/ENTER key. The new current limit setting is saved

internally.

Edit mode ends automatically if you don't press any front panel key within

25 seconds, and any change you made to the last setting is not saved.