Specifications

Halogen Gas Monitor – Multi Zone
20 Instruction 3015-5074
Multiple HGM-MZs Connected to a Building Management System
Daisy Chain Fashion
RS-485
TERMINATOR
“IN”
TERMINATOR TERMINATOR TERMINATOR TERMINATOR
“OUT” “OUT” “OUT” “IN”
PC Software
NOTE 1: The HGM-MZ is compatible with HGM300 PC software version 1.52 and higher. However,
calibration data can only be edited on the front panel of the HGM-MZ , not through the PC software or RDM
units.
NOTE 2: The PC software uses COM1 by default. Therefore, the interface cable should be connected to
the port configured as COM1 on the PC. Also, no other software drivers or devices in the computer may
control COM1 when the HGM-MZ software is in use. Alternatively, COM2 may be used by adding a space
and the number 2 to the command line, c:\pc2HGM.exe 2, for example. When using a USB to serial
converter, be sure it has been mapped to COM1 or COM2.
The connection is made through a standard “straight through” serial port connection. A three-wire
connection is used (RXD, TXD, and GND). No hardware flow control is used. The HGM-MZ software
automatically configures COM1 to match the HGM-MZ RS-232 communications parameters.
NOTE 3: Occasionally, the laptop connection will not connect properly and only two beeps are heard and
the program times out. To resolve this, disconnect the RS-232 cable and cycle power on the HGM-MZ and
the laptop. After both are operational, connect the RS-232 cable and start the software program.
1. Apply power to HGM-MZ and allow it to warm up.
2. Connect RS-232 interface cable to the PC and RS-232 port on the HGM-MZ.
3. Insert software disk into the PC.
4. Open the HGM-MZ software using Windows Explorer.
5. Upon start up, the program will immediately attempt to download data from the HGM-MZ, as
indicated by several beeps.
Navigate using your PC keyboard:
• Use the up, down, left and right arrow keys to navigate through the screen options.
• Use the Enter key to select options.
• Use the Esc key to go back one step.
6. Go to EDIT. From the EDIT Menu, select SYSTEM. The HGM LOCATION becomes highlighted.
Press Enter to move to the HGM TAG area. Use the Backspace key to remove the existing tag.
Enter a new tag. Press Enter to return to LOCATION. Select the next item to be addressed. Note
that you cannot change the “SN” or “FIRMWARE” items. Press the Esc key to return to the menu bar.
HGM-MZ
UNIT 1
NODE 1
HGM-MZ
UNIT 2
NODE 2
HGM-MZ
UNIT 3
NODE 3
HGM-MZ
UNIT 4
NODE 4
BUILDING
MANAGEMENT
SYSTEM