1. DL manuals
  2. Bacharach
  3. Test Equipment
  4. HGM300
  5. Installation Manual

Bacharach HGM300 Installation Manual

Manual is about: Refrigerant Gas Monitoring System

Summary of HGM300

  • Page 1

    1 of 18 3015-4568 revision 0 9/11/03 installation guide bacharach hgm300 to lonworks ft-10 communications adapter introduction the bacharach hgm300 to lonworks communications adapter enables an hgm300 refrigerant monitor to communicate with a lonworks ft-10 free topology network. Zone ppm readings, ...

  • Page 2

    2 of 18 front side of the door. Position the adapter board over the standoffs mounted on the hgm door. Install the five remaining 6-32 screws through the board and into the standoffs and tighten. Connect power wiring from the hgm300’s 120v auxiliary power terminal block to the adapter board’s power ...

  • Page 3

    3 of 18 if an rdm800 remote display is to be used with the adapter, refer to figure 3 for wiring details. Note that when the rdm800 is used, two rs-485 cables must be run between the hgm300 and rdm800, so plan accordingly. In either case, be sure to set the hgm300’s internal “terminator” slide switc...

  • Page 4

    4 of 18.

  • Page 5

    5 of 18 setting hgm communication address on adapter see figure 4 for the location of adapter dipswitch ‘a’. Switches 5-8 on the adapter’s ‘a’ dipswitch are used to match the node address set on the hgm’s address dipswitch (on hgm main board). Values from 0-15 are possible: hgm address a5 a6 a7 a8 -...

  • Page 6

    6 of 18.

  • Page 7

    7 of 18 configuring the hgm300 with rdm800 or laptop pc the only hgm parameters that are changeable through lonworks are the alarm thresholds. Configuring the hgm for refrigerant type and length of tubing for each zone (zero length to disable a zone) must be done with the rdm800 remote display or a ...

  • Page 8

    8 of 18 hgm alarm acknowledge options two alarm acknowledge options are supported—auto acknowledge and network acknowledge. In the auto acknowledge mode, the hgm will clear its alarm outputs the next time the alarmed zone is sampled and its ppm has dropped below the alarm thresholds. No intervention...

  • Page 9

    9 of 18 lonworks objects and network variables the adapter contains one node object, sixteen zone objects, one general status object, and one alarm control object. There is one zone object for each refrigerant sampling zone. Object 0 – the node object network input variable nvirequest allows the use...

  • Page 10

    10 of 18 network output variable nvostatus returns the information requested by nvirequest. The status response will indicate the status of the object that received the request. The status bits supported are listed above under rq_report_mask. One nvostatus response will be returned for each nvireque...

  • Page 11

    11 of 18 objects 1-16 – zone objects there is one zone object for each sampling zone in the hgm300 (16 total): network output variable nvohgmzoneppm shows the measured gas concentration for a particular zone. The value will range from 0-65535 ppm. Network output variable nvohgmzonestatus is a text s...

  • Page 12

    12 of 18 critical fault some critical fault prevents normal zone ppm measurement. (view nvohgmfaults for details on fault type) hgm busy occurs with rdm800 installed when certain screens are displayed. Comm fault 1 comm failure between hgm and adapter. Comm fault 2 comm failure between adapter inter...

  • Page 13

    13 of 18 object 17 – general status object the general status object provides information about any hgm300 internal faults present and shows which zone is currently being sampled: network output variable nvohgmfaultalert reports whenever any fault is detected within the hgm or adapter. It is of type...

  • Page 14

    14 of 18 hgm busy (if rdm800 attached and showing certain screens)(bit 4) comm fault 1 (communications failed between hgm and adapter)(bit 3) comm fault 2 (internal communications failed within adapter)(bit 2) unused (bit 1) unused (bit 0)(least significant bit) network output variable nvozonesampli...

  • Page 15

    15 of 18 object 18 – alarm control object the alarm control object provides information about any alarms which are present in the hgm. It also provides mechanisms for acknowledging alarms, and for viewing and setting the leak, spill, and evacuate alarm thresholds for each zone: network input variabl...

  • Page 16

    16 of 18 network input variable nvisetzonethresh allows leak, spill, and evacuate alarm thresholds (in ppm) to be set for each monitoring zone. Nvisetzonethresh has four parameters to be set by the user: zone specifier: a number 1-16 specifies which zone is having its thresholds changed leak alarm t...

  • Page 17

    17 of 18 network output variable nvohgmzonethresh displays the following information for the zone specified by nvigetzonethresh: 1. Zone (1-16) whose alarm thresholds are being displayed 2. Leak alarm threshold in ppm (0-65535) 3. Spill alarm threshold in ppm (0-65535) 4. Evacuate alarm threshold in...

  • Page 18

    18 of 18 led 1 and led 2 will normally show activity about every 15 seconds. Since the refrigerant monitoring process is fairly slow and new data is only available every 15 seconds or so, the adapter polls the hgm at a slow rate to reduce the communications burden on the hgm main processor. Again, c...