MSA ZGARD C Instruction Manual Download Page 10

 

 

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 

 

   

 

   

 

 

RELAY NORMALLY EN/DE (IN/ OUT) 

 

 

DISPLAY RANGE B/A (IN/ OUT) 

 

 

DELAY  5MIN. / POT (IN/ OUT) 

 

 

HORN  SOLID / VAR (IN / OUT) 

 

 

WARNING  POT / 35% (IN / OUT) 

 

 

ALARM  POT / 50% (IN / OUT) 

 

 

ALARM LATCH (IN) 

Summary of Contents for ZGARD C

Page 1: ...warranties made by Mine Safety Appliances Company with respect to these Products are voided if the products are not installed used and serviced in accordance with the instructions in this user guide...

Page 2: ...ufacturers of such components THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED IMPLIED OR STATUTORY AND IS STRICTLY LIMITED TO THE TERMS HEREOF SELLER SPECIFICALLY DISCLAIMS ANY WARRANTY OF...

Page 3: ...luded as part of the installation and as a routine inspection of the system 5 Use only genuine MSA replacement parts when performing any maintenance procedures provided in this manual Failure to do so...

Page 4: ...g Specifications and Features 4 0 Installation and Set up Display Mode Number of Remote Sensor Inputs 4 1 Relay Function Setting up the Warning and Alarm Delays 4 2 Audible Alarm Device Setting Warnin...

Page 5: ...ZGARD C Controllers This is a quick guide for determining the functionally capability and configuration of each controller ZGARD C CONTROLLER MODEL 1 CHANNEL 4 CHANNEL Number of Remote Sensors 1 4 Po...

Page 6: ...controller according to the required application Also refer to the ZGARD C controllers Installation Outline drawings located in the back of this manual which provides important information regarding...

Page 7: ...lue between 0 and 100 Full Scale FS Delay Function There are two user jumper selected methods for setting the ZGARD C 1 Channel controller warning and alarm delays The first uses pre programmed fixed...

Page 8: ...ct the actual operating range of the incumbent remote gas sensors There are two display mode options A and B and is selected by placing Jumper H2 in the required position If jumper H1 4 is OUT Range A...

Page 9: ...allows adjusting of the delays from 0 to 10 minutes via two potentiometers labeled Warning Delay Alarm Delay To select the adjustable delay jumper H1 5 is NOT inserted Removing the jumper activates t...

Page 10: ...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 an...

Page 11: ...SPAN potentiometer can be used to perform these To adjust the output to 4 20mA for 0 100 input factory setting when using a 4 20mA type sensor apply a 0 4mA signal to the input and adjust the ZERO pot...

Page 12: ...adjustable on the controller and can be set to any value between 0 and 100 Full Scale FS Delay Function There are two user jumper selected methods for setting the ZGARD C 4 Channel controller warning...

Page 13: ...a special Display Range that displays the first two channels 1 2 as 0 10 0ppm and the second two channels 3 4 as 0 100ppm This is useful for Carbon Monoxide CO Nitrogen Dioxide NO2 applications Remote...

Page 14: ...of the delays from 0 to 10 minutes via two potentiometers labeled Warning Delay Alarm Delay To select the adjustable delay jumper H1 5 is NOT inserted Removing the jumper activates the associated pot...

Page 15: ...nce 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 point...

Page 16: ...can be used to perform these To adjust the output to 4 20mA for 0 100 input factory setting when using a 4 20mA type sensor apply a 0 4mA signal to one of the input and adjust the ZERO potentiometer...

Page 17: ...RESET button to silence 7 Allow the associated remote gas sensors to stabilize Refer to the appropriate gas sensor manual for further details Depending on the controller s warning alarm and delay sett...

Page 18: ...nuine MSA replacement parts when performing any maintenance on the ZGARD C Controllers Failure to do so may seriously impair instrument performance Repair or alteration of the ZGARD C controllers beyo...

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