Specifications

Halogen Gas Monitor – MultiZone Remote Display
Instruction 3015-5157 23
Page 27). The monitor will perform a self-check on power-up, and if the number of zones detected does not
agree with the number of zones installed a fault will occur.
1. Press the ENTER key to modify the number.
2. Use the UP/DOWN cursor keys to modify the number.
3. Press ENTER to accept the new number or ESC to revert to the previous setting.
NOTE: The HGM-MZ auto setting detects the number of zones present on power-up. DO NOT BLOCK
ANY ZONES. A BLOCKED ZONE WILL GIVE THE MONITOR A FALSE INDICATION ON POWER-UP.
The number detected on power-up is the default value for this parameter.
Alarm Ack Mode
This function programs the relays in the HGM unit for latching or non-latching operation.
1. Press the ENTER key to adjust the setting.
2. Use the UP/DOWN cursor keys to toggle between settings.
AUTO – Non-latching (Alarm relay will automatically de-energize when the gas level drops
below its alarm point.)
MANUAL – Latching (Alarm relay remains energized, and will not release until the alarm condition
has been manually acknowledged. Refer to Acknowledging Alarms on Page 37.)
3. Press ENTER to accept the new entry or ESC to revert to the previous setting.
Audible Alarm
This parameter selects the function of the HGM-MZ’s internal audible alarm device.
1. Press the ENTER key to modify 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 Time
Sets the length of time a zone will be monitored when the zone hold feature is actuated (refer to Zone Hold
Mode on Page 29). The default is 15 minutes. This parameter can be set to any value between 1 and
999 minutes.
1. Press the ENTER key to modify 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. You can set this value from 1 to 99 PPM.
1. Press the ENTER key to modify 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 modify 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.