Compaq MTEK6000 user manual Installing the Pulse Output Wiring

MTEK6000 SERIES USER'S MANUAL

INSTALLING THE PULSE OUTPUT WIRING

The MTEK6000 comes standard with a board installed that provides two optically isolated pulse outputs. These outputs are configurable as either Form C or Form A type outputs. An alternative version of the board is available that provides four pulse outputs. Both versions of the board also provide terminal block positions to access the uncorrected mechanical volume switch output of the index. See Fig. 2-11 for pulse output wiring. The option boards optical coupling and physical arrangement of circuitry provide a minimum of 1,500 volts of isolation.

Wiring connections for the pulse outputs are made from terminals 19 to 17 for Pulse output #1, terminals 16 to 14 for Pulse output #2, terminals 13 to 11 for Pulse output #3 and terminals 10 to 8 for Pulse output #4. See Fig. 2-11 for pulse output wiring location and Form C vs. Form A jumpering. Note that proper operation of the Form C pulse output

configuration requires that a constant wetting current be available at both the normally open and normally closed terminals by the device attached to that pulse output.

The corrected volume pulse output generated can be scaled to any desired volume value. Typical values are 10, 100, 1,000, or 10,000 cubic feet per pulse, or the metric equivalents. The scaling factor is selected by the Pulse Out CF Per Pulse parameters. The pulse duration (width) is also configurable up to 5,000 ms. The Pulse Output On-Time and Off-Timeparameters determine the pulse time for corrected volume, uncorrected volume and pressure corrected volume pulses. The Alarm Pulse Time (ms) parameter determines the pulse time for alarm outputs. See Appendix C in this manual or Meter Reader Help screen for description of this parameter.

Figure 2- 9 Pulse Output Wiring

2-10 January 2002