Specifications

Halogen Gas Monitor – MultiZone Remote Display
Instruction 3015-5157 59
Release Zone Hold Register Register 0x0017h W 10 bytes
Variable Type Length Description
Rel_Hold * * See description of STATUS REGISTER
Hold Zone Register Register 0x0018h W 10 bytes
Variable Type Length Description
Zone_Hold * * See description of STATUS REGISTER
HGM-300 Hold Mode
The HGM-400 can be made to hold or “dwell” on a particular zone if necessary. The length of the hold time is
defined by the HOLD TIME parameter in the System Data Register.
Placing the HGM-MZ into hold mode:
1. Read the HGM-MZ Status Register (0x0011h)
2. Modify the content of the status register structure to change the MODE parameter to zone hold mode
and the active zone parameter to the zone which you wish to hold.
3. Send this updated status register structure back to the HGM-MZ using PRESET MULTIPLE
REGISTER COMMAND to the HOLD ZONE REGISTER (0x0018h).
Releasing the Zone Hold
1. Read the HGM-MZ Status Register (0x0011h)
2. Modify the content of the status register to change the MODE parameter to normal mode and the
active zone parameter to the zone which you would like to resume normal activity on
3. Send this updated status register structure back to the HGM-MZ using PRESET MULTIPLE
REGISTER COMMAND to the RELEASE HOLD REGISTER (0x0017h).