Specifications
Halogen Gas Monitor – MultiZone Remote Display
Instruction 3015-5157 55
Zone Data Register 0x12xxh R/W 78 bytes
Each zone for an HGM-MZ has a separate Zone data structure that is 78 bytes long. The zone number is the
low order byte in the register address (i.e., Zone 1 data register = 0x1201h)
Variable Type Length Description
Location C 13 bytes 13 byte array, Alpha Numeric Description or Name of Zone
Flow OK UC 1 byte Status of Flow check. Value of 1 indicates flow check is
good. DO NOT MODIFY
Refrig. Type UC 1 byte See note 1 Below (DEFAULT = R134a)
Distance UI 2 bytes Zone Tubing Length (in feet) (DEFAULT = 100 feet)
Zone Temp I 2 bytes
Avg temp at zone (degrees C) (DEFAULT = 25°C)
Concentration Float 4 bytes Last Measured concentrations (uM/L) DO NOT MODIFY
Concentration2 Float 4 bytes Last Measured concentration (PPM) DO NOT MODIFY
Alarm Ack UC 1 bytes Set value to 1 to acknowledge Alarm. NOTE: HGM-MZ
will reset this byte to 0 when the Alarm byte (below) is = 0
and zone in alarm is sampled. If the alarm condition/byte
increases (leak>>spill or spill>>evac) the HGM-MZ will also
reset this byte to 0
Alarm UC 1 bytes Alarm Status; 0 = no alarm, 1 = leak; 2 = spill; 3 =
evac.
Leak Level UI 2 bytes Level to trigger a leak alarm (in PPM) (DEFAULT = 100)
Spill Level UI 2 bytes Level to trigger a spill alarm (in PPM) (DEFAULT = 300)
Evac Level UI 2 bytes Level to trigger a evacuate alarm (in PPM) (DEFAULT =
500)
Peak PPM UI 2 bytes Highest Recorded PPM in zone
Peak Time TIM 13 bytes Date an time of highest peak (see note 2 for format)
Alarm Time TIM 13 bytes Date and time of last alarm (see note 2 for format)
Not Used 13 bytes
Log Interval UI 2 bytes Number of minutes between Log entries (DEFAULT =
1440)
NOTE 1: Refer to the Recommended Alarm Settings & Gas Enumeration table on page 46.
NOTE 2: Time Structure Format consists of 13 unsigned character types. They are 1 second digit, 10
second digit, 1 minute digit, 10 minute digit, 1 hour digit, 10 hour digit, 1 day digit, 10 day digit, 1 month digit,
10 month digit, 1 year digit, 10 year digit, last byte is unused.