Specifications

Halogen Gas Monitor – Multi Zone
Instruction 3015-5074 27
Audible Alarm
This parameter selects the function of the HGM-MZs internal audible alarm device.
1. Press the ENTER key to adjust the setting.
2. Use the UP/DOWN cursor keys to select unused, monitor on, evacuate, spill, leak, fault, or alarm.
3. Press ENTER to accept the new entry or ESC to revert to the previous setting.
Zone Hold Mode
A zone can be placed on hold and continuously monitored for a length of time determined by the Zone Hold
Time value. To place a zone on hold, select the zone at the top level screen, then press and hold down the
ENTER key until the unit beeps. The word “HOLDING” will appear in the status box.
While in the hold mode, further investigation of the zone’s status can be made by navigating to that Zone’s
Setup Screen #1. To release the zone from the hold mode, press and hold down the ENTER key until the
unit beeps and the screen display returns to normal.
Zone Hold Time
Sets the length of time a zone will be monitored when the zone hold feature is activated. The default is 15
minutes. The range is 1 to 999 minutes.
1. Press the ENTER key to adjust this setting.
2. Use the LEFT/RIGHT cursor keys to move across the entry field and the UP/DOWN cursor keys to
modify the individual numbers.
3. Press ENTER to accept the new entry or ESC to revert to the previous setting.
Detection Limit
This is essentially a squelch setting that instructs the instrument to interpret PPM readings below the
designated level as 0. The range is 1 to 99 PPM.
1. Press the ENTER key to adjust the setting.
2. Use the UP/DOWN cursor keys to modify the setting.
3. Press ENTER to accept the new entry or ESC to revert to the previous setting.
Loop2 Factor
This sets the PPM scale factor for current loop number 2. To calculate the current output, multiply the scale
factor by the PPM and add 4. For example, at the default scale factor of 0.016, a measurement of 100ppm
would generate a current output of 5.6 mAdc. The current output cannot exceed the 20 mAdc capacity of the
interface.
1. Press the ENTER key to adjust the setting.
2. Use the LEFT/RIGHT cursor keys to move across the entry field and the UP/DOWN cursor keys to
modify the individual characters.
3. Press ENTER to accept the new entry or ESC to revert to the previous setting.
Re-Zero Mode
This parameter defines the frequency at which the instrument re-zeros the optical sensor.
1. Press the ENTER key to adjust the setting.
2. Use the UP/DOWN cursor keys to toggle between settings.
AUTO – Sets the instrument to re-zero every 10 minutes.
ZONE CHANGE – Sets the instrument to re-zero at each zone change. This is the most accurate
setting, but increases the time interval between measurement cycles.
3. Press ENTER to accept the new entry or ESC to revert to the previous setting.