Multi-Tech Systems 7500 - Manual (Page 220)

Calibration Pulser Module ION 7500 / ION 7600 User’s Guide
Page 220 Digital and Analog I/O Technical Note
Detailed Operation
The following example illustrates the basic operation of a Digital Output module.
The input in the figure could be any of the Source, Force ON, Force OFF, or Normal
inputs. The EvLog Mode and the Port setup registers could be set to whatever is
appropriate (they do not affect the output values of the module). Similarly, the
Mode and Event output registers contain whatever is appropriate.
When specifying the Polarity setup register, you must consider the characteristics
of the external output device. If you have defined different
ON or OFF labels for the
State output register, you should consider the characteristics of the output device
and the Polarity setting.
Calibration Pulser Module
The Calibration Pulser module is a highly accurate energy pulser often used for
verifying calibration on ION revenue meters. This module can serve as an
intermediary between the power (kW, kVAR or kVA) outputs of the Meter Units
Power Meter module and an ION meter’s hardware output channel.
The module integrates the instantaneous power inputs and then outputs complete
pulses or KYZ transitions to a hardware channel. Using the Calibration Pulser
module setup registers, you must specify the output mode, output rate (Kt), the
output pulse width or minimum duration between KYZ transitions, and the
hardware port where the pulses appear.
Calibration Pulser Module Setup Registers
Setup Register Description
Output Mode
Specifies whether the output is a complete pulse (PULSE) or a change of
state transition (KYZ)
Pulse Width
Specifies the width (on-time) of the output pulse (e.g. how long an LED is lit
or relay is open)
Kt
Defines how much energy is accumulated by the module before an output is
sent to the hardware channel
Integration Mode Defines the mode of integration
Ports Defines the hardware port where the output appears