User Manual

Table Of Contents
Landis+Gyr Chapter 7 - Electronic Pulser Installation
Installation Guide 98-1135 Rev AB 89
corrected, uncorrected, alarm, or not used. The installation information provided in this section is to
help guide the user with installing a GPR module to an electronic pulser
GPR Telemetry Specifications
The GPR can support two volume pulse inputs and one alarm input. The pulse inputs are
organized into three channels referenced to the sensor PCB connector on the GPR circuit
board:
By design the hardware counting channels are labeled A and B. In Command Center,
channels 1 and 2 are used.
Channel A = Command Center channel 2
Channel B = Command Center channel 1
Channel A. Optional volume input.
Channel B. Primary volume input.
Alarm. Alarm input.
Both channel A and B can support Form-A or Form-C type pulsers.
The alarm channel can support Form-A or Form-B type pulsers.
Minimum ON/OFF input pulse width is 50 mSec / 50 mSec.
Nominal switch bias voltage is 3.0V.
Nominal switch bias current is 30 uA.
NOTE: The billing or primary output on the pulser is to be connected to Channel B on the GPR.
NOTE: It is the responsibility of the user to make sure the output pulse meets the minimum pulse
ON/OFF time. This is usually a configurable parameter for electronic volume correctors.
NOTE: When both channels, A and B, are connected and used as volume inputs in an installation, it
is highly recommended that both channels are connected and configured for type Form-A at the
pulser side as well as the GPR side. If Form-C is used in a dual volume input configuration, the
battery life of the GPR is not guaranteed.
NOTE: The GPR should not be connected to any output that has power. It is a good practice to
measure the output of the pulser before installing to the GPR. Voltage above 6.0V can cause
damage to the GPR and will violate the intrinsic safety rating.
NOTE: If the battery is unplugged, do not connect the battery until the module is ready for operation
to start.
Table 7 - 1. Definitions
Term Definition
NO Normally Open
NC Normally Closed