GAI-Tronics ICS Hazardous Area Page/Party Stations - Manual (Page 15)

Pub. 42004-723L2G
ICS Hazardous Area Page/Party
®
Station Page 13 of 31
f:\standard ioms - current release\42004 instr. manuals\42004-723l2g.doc
11/14
Adjustments
Opening the Station
WARNING
Before performing any of the following settings and adjustments, remove all
power from the station.
WARNING
To reduce the risk of hazardous atmospheres, disconnect the equipment
from the supply circuit before making any adjustments to the amplifier’s handset level.
Remove all cover bolts from the enclosure. Swing the front door open to access the internal PCBAs.
Setting the Address
For the SmartSeries option to function properly, each station in an ADVANCE system zone must be
given a unique address using the hexadecimal switches, S1 (Hi Address) and S2 (Lo Address). Each
switch contains 16 settings, labeled 0–F. A small arrow on each switch indicates the setting.
The station address is determined by the high address setting followed by the low address setting. For
example, to assign an address of 05, the high station address is set to 0 and the low address is set to 5.
Valid address settings are 05 to FE. Record the address assigned for each station in the system for your
records. If the SmartSeries PCBA is installed in a system without an ADVANCE head end, set the
address to 04 (default).
ALS Minimum Level
The ALS minimum level is the lowest speaker output level that the station will maintain. To set the ALS
minimum level, turn R91 fully counterclockwise. Listen for a single beep from the speaker indicating the
speaker amplifier is in the Minimum Level Adjustment mode. If the page line is in use immediately after
the beep tone, the page signal should be used to make the minimum level adjustment. If the page line is
inactive following the beep tone, a continuous tone is activated to make the minimum level adjustment.
After the tone is activated, all page line activity is ignored until completion of the adjustment.
This test tone is used as a reference to adjust the speaker amplifier output level to the desired volume.
Adjust R91 to the desired output. The test tone automatically shuts off 5 seconds after the last
adjustment. The factory default setting for minimum level is 4.0 watts nominal into an 8-ohm load.
ALS Offset Level
The ALS offset level allows the output of the speaker amplifier to maintain a set difference or “offset”
between the ambient noise level and the speaker output level. To set the ALS offset level, turn R91 fully
clockwise and listen for the two beep tones indicating that the station is in the Offset Adjustment mode.
If the page line is in use immediately after the two beep tones are heard, the page signal should be used to
make the offset level adjustment. If the page line is inactive immediately following the beep tones, a
continuous tone is activated to make the offset level adjustment. After the tone is activated, all page line
activity is ignored until completion of the adjustment. Adjust R91 to the desired offset level.
N
OTE :
This adjustment should be made under maximum ambient noise level conditions. The ALS offset
level must always be set higher than the ALS minimum level setting.