Bacharach 3015-4286 - Manual (Page 22)

Single Zone Gas Monitor
18 P/N: 3015-4256 Rev 13
3.2. General Operation
Once the SZ monitor has been installed, set up, and powered ON, the
monitor will make measurements in the area being sampled for desired
gas without further operator intervention. The results of those
measurements are shown on the front panel display.
In the example shown above, MEASURE indicates that the SZ unit is actively monitoring for refrigerant
gas, and that currently 45 ppm of R-134A (refrigerant 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 function (page 22).
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 (AUDALRM page 22). Optional external
alarm devices can be connected to the alarm relays to alert personnel that a Leak, Spill, or Evacuate
alarm condition has occurred (page 14). Pressing the front panel SILENCE button will acknowledge an
alarm and turn OFF all alarm indicators with the exception of the front panel ALARM light. The alarm
circuit will reactivate, however, if the alarm condition is not cleared within the time period set by the
SILENCE function (page 22). The ALARM light will turn OFF after the detected gas level goes below the
lowest alarm point and after the SILENCE button is pressed.
If a system fault occurs (see Fault Code list on page 23), the monitor responds by turning ON the front
panel SYSTEM FAULT (yellow) light and energizing the fault relay. If the internal audible alarm is turned
ON, it too will activate (AUDALRM page 22). An optional external alarm device can be connected to the
fault relay to alert personnel that a system fault has occurred (page 14). Pressing the front panel
SILENCE button will acknowledge the fault and turn OFF all alarm indicators with the exception of the
front panel SYSTEM FAULT light. The alarm circuit will reactivate, however, if the fault condition is not
cleared within the time period set by the SILENCE function (page 22). The SYSTEM FAULT light will turn
OFF only after the cause of the fault has been eliminated.
A log of the alarm and fault events can be viewed using the monitor’s ALARMS and FAULTS function
(page 22).
MEASURE 00485 pk
45ppm R134A