Section 3
ZGARD C 1-Channel Controller
Installation and Setup
Audible Alarm Device Setting:
There are two audible alarm modes. The first is a Solid-ON mode that sounds the audible alarm
continuously while the ZGARD C controller is in an alarm state. The second is a Variable-ON mode that
sounds the audible alarm in an eight second interval pulsed fashion. The time between pulses is fixed,
but the on-time of the audible alarm is determined by the amount that the alarming sensor is exceeding
the alarm set point. For example, if the set point is at 50% and an alarm comes in at 55%, the audible
alarm would give short beeps every eight seconds. As the alarm level increases from 55% to 100%, the
beeps become longer in duration until a solid tone appears at 100%.
To select the Solid-ON audible alarm mode, jumper H1-6 must be inserted. To select the variable-ON
audible alarm mode, jumper H1-6 must be removed. In both modes, pressing the reset button will
silence the audible alarm, but will not have any effect on the alarm LED on the front panel or the alarm
relay.
Warning and Alarm Set-Points:
There are two methods for setting the warning and alarm set points. The first uses pre-programmed,
fixed set points of 35% for warning and 50% for alarm.
The second allows for adjusting the set points anywhere from 0% to 100% via two potentiometers
(labeled: WARNING, ALARM). To select the fixed set points, jumpers H1-7 (warning) and/or H1-8
(alarm) must NOT be inserted. Inserting a jumper activates the associated potentiometer and test
point (TP1 for warning and TP2 for alarm). The test points show a voltage of 0 - 5Vdc for a set point of
0 - 100%.
TP = Set point (% full-scale)/100 x 5Vdc.
Example:
To set up a Warning threshold of 25% FS and an Alarm threshold of 60% FS.
Warning Set-Point
TP1 and TPCOM should read:
Warning (25/100) x 5 =
1.25Vdc
Alarm Set-Point
TP2 and TPCOM should read:
Alarm (60/100) x 5 =
3.0Vdc
3.3
H1
PARAMETER
SETUP
1
2
3
RELAY NORMALLY EN/DE (IN/ OUT)
4
DISPLAY RANGE B/A (IN/ OUT)
5
DELAY 5MIN. / POT (IN/ OUT)
6
HORN SOLID / VAR (IN / OUT)
7
WARNING POT / 35% (IN / OUT)
8
ALARM POT / 50% (IN / OUT)
9
ALARM LATCH (IN)