Bacharach 3015-4256 User Manual

Instruction 3015-4256 

13

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Once the HGMSZ has been installed, set up, and powered ON, it will make measurements in the area 

being sampled for refrigerant gas without further operator intervention. The results of those 
measurements are displayed on the front panel display.  
 
 
 
In the example shown above, MEASURE indicates that the HGMSZ is actively monitoring for refrigerant 
gas, and that currently 45 ppm of R-134a gas is being detected. This display also indicates that a peak 

measurement of 485 ppm has been made.  
An operator can reset the peak value to zero by pressing the ENTER button. 

A log of up to 200 previous measurements can be viewed using the PPM LOG screen (Page 15). 
If the detected gas level exceeds the preset Leak, Spill, or Evacuate alarm point, then the monitor 
responds by turning ON the front panel ALARM (red) light and energizing the corresponding alarm relay. 

If the internal audible alarm is turned ON, it too will activate. Optional external alarm devices can be 

connected to the alarm relays to alert personnel that a Leak, Spill, or Evacuate alarm condition has 
occurred. Pressing the front panel SILENCE button will acknowledge an alarm and turn OFF all alarm 

indicators. The alarm circuit will reactivate, however, if the alarm condition is not cleared within the time 
period set by the SILENCE function (Page 16). 

HGMSZ

DISPLAY 
SCREEN

ENTER 
Press to save a 
displayed value

KEYPAD 
Use these buttons: 
1) To move the arrow 
(>) on the display 
screen to the desired 
function 
2) Scroll through data 
3) Change a 
function’s value 

MONITOR ON 
LIGHT (Green) 
Flashes during 
warm-up 

SYSTEM FAULT 
LIGHT (Yellow)

ALARM LIGHT 
(Red)

SILENCE / QUIT 
Press this button: 
1) To acknowledge 
an alarm and turn 
OFF the Alarm Light
2) Return to the 
previous screen 
without saving data 

MEASURE  00485pk 
   45ppm R134A