Pulsers, About standard pulsers, Testing pulsers and i.s barriers – Gasboy Atlas Start-up User Manual
Page 113: Pulsers -53
MDE-4334D Atlas™ Start-up and Service Manual · July 2013
Page 5-53
Pulsers
Electronic and Electrical Components
Pulsers
Read and follow all safety precautions in
. Warnings and
cautions appear throughout this section and must be regarded with utmost vigilance. Follow
OSHA lockout/tagout procedures.
For DEF units, the pulser is part of the Coriolis Meter. Refer to
About Standard Pulsers
A pulser converts meter rotations to PPG (or liter) for use in some units by way of the
controller board or mechanical gear/reed switch system. Program the unit to scale pulses for
specific applications. For example, standard gallonage units use 1000 pulses per gallon. For
other conversion factors, refer to
on
Figure 5-48: Pulser Assemblies
T18350-G3 Pulser
(9 X 52/53 Standard Flow and 9 X 40 High Flow)
Retail Pulser
Commercial Pulser
M04011B001 Pulser
Testing Pulsers and I.S Barriers
Voltage is limited to 12 VDC in the pulser. An I.S Barrier is used to limit the current. Test the
pulser by substitution and proceed as follows:
1
Unplug the pulser and plug in a known, good pulser.
2
Rotate the pulser and watch displays for the count.
3
Test the I.S barrier by substitution, or disconnect it and check the I.S Barrier with an
Ohmmeter.
4
Measure 10,000 Ohms + or - 20% from gray to gray, yellow to yellow, brown to brown, and
amber to amber.
5
Always read a low resistance from the green wire to the case.
6
Measure between each wire. Meter must indicate an open.