SBS AT10.1 SERIES, Operating And Service Instructions

Page: 35 / 104

OPERATING THE AT10.1
29
2.2.5. Testing the front panel indicators
•
Press the
DOWN
key. This is also the
LAMP TEST
key.
The meter will display 8888 , and all status & alarm indicators will light.
The
LAMP TEST
key does not test the AC ON indicator. The AC ON
indicator lights whenever ac power is present, and the ac circuit breaker is
turned on. The
LAMP TEST
key does not operate when ac power is off.
To test the action of the AT10.1 summary alarm relay, press and hold the
LAMP TEST
key for 4 seconds to transfer the relay. If you are monitoring
the relay with a remote annunciator, it will detect the alarm condition.
2.2.6. Testing the Auxiliary Alarm Relay PC Board (optional)
If you have the optional Auxiliary Alarm Relay PC Board (A5) installed,
you can similarly test the six (6) individual alarm relays. Press and hold
the
LAMP TEST
key for 4 seconds to transfer the relays. If you are
monitoring the relays with a remote annunciator, it will detect the alarm
conditions.
2.2.7. Interpreting the alarm indicators
There are six (6) red alarm LED indicators at the right side of the front
panel. An indicator lights for each of the following alarm conditions:
•
HIGH DC VOLTAGE : DS13 lights whenever the dc output voltage
exceeds the specified alarm voltage setting. See Section 2.3.4 to learn how
to adjust the HVDC alarm setting.
•
LOW DC VOLTAGE
: DS14 lights whenever the dc output voltage is
below the specified alarm voltage setting. See Section 2.3.4 to learn how to
adjust the LVDC alarm setting.
•
DC OUTPUT FAILURE
: DS15 lights whenever the AT10.1 cannot
provide its full rated output voltage or its full rated output current. This
alarm setting cannot be adjusted.
•
AC INPUT FAILURE : DS16 lights whenever the ac power supply to the
AT10.1 is interrupted.
•
POS GND : DS17 lights whenever leakage current from the battery positive
terminal to ground exceeds a specified threshold. *
•
NEG GND
: DS18 lights whenever leakage current from the battery
negative terminal to ground exceeds a specified threshold. *
* The ground fault detection sensitivity can be adjusted
from 5 to 30
k
Ω
, see Section 2.3.4 on Page 34.
When an alarm occurs, the indicators will light immediately. The AT10.1
also features a summary alarm relay with one (1) form-C contacts (TB3)
rated 0.5A / 125 Vac/Vdc. If an alarm condition lasts for 30 seconds or
longer, the summary alarm relay transfers. Under standard settings, when
the alarm condition is corrected, the corresponding relay and indicator
resets automatically. Latching alarm capability for the AT10.1 is
available, featured in supplemental
Operating Instructions (
JA5098-00
).