Heath Consultants Heath Volume Corrector (HVC) - Manual (Page 7)

7
Mounting & Installation
Equipment Required
• Lap Top Computer (Using Win XP, Win Vista or Win 7)
•
Communications Cable
•
Test Gauge, Dead Weight Tester or Accurate Pressure gauge
• Temperature Reference (If equipped with gas temperature probe)
•
HVC Mounting Kit (gasket, wrench)
• Mechanics Tool Kit
Matching the HVC to the Meter Rotation
The HVC 325 is equipped with a “Falling magnet/ reed switch” Mechanical Index Assembly. The
HVC 325 is suitable for direct mounting on most diaphragm, rotary or mechanical turbine meters
including, among others, Rockwell, Equimeter, Roots, Dresser, Romet or American with instrument
drives.
When directly mounted to a meter, the user should ensure that the mechanical index rotation of the HVC
325 matches the rotation of the meter. Unless otherwise specified, the HVC 325 will be shipped suitable
for clockwise (CW) rotating meters. The proper rotation can be confirmed by spinning the drive dog
on the bottom of the instrument in the direction required by the meter. If the mechanical counter
odometer turns in the wrong direction, change rotation.
When configuring the HVC 325 using HVC Host, the “UnCor Vol Input” will be configured by default to
“Digital Input”. This will grey out the: “Clockwise” selection and will set the “Meter Speed” to “Fast”
regardless of actual meter rotation as the falling magnet/ reed switch mechanical index is in use. If the
optional Optical Index is used, the “UnCor Vol Input” will be configured to “Opto Input” which will
enable the direction and speed selections.
Meter Mounting
The standard HVC 325 will fit most any mechanical meter instrument drive. Use gasket (provided)
between the HVC 325 and meter base. Mount on to top of the meter while insuring that the HVC 325 drive
pin engages properly with the meter drive. Verify meter rotation. Secure the HVC 325 with bolts (not
supplied with mounting kit) to the meter base.
A “Large Mounting kit” ( 77R61-9580) can be supplied as an option. This kit consists of mounting
hardware, test plug, isolation valve, miscellaneous fittings and 1/8” tubing to allow connection of
pressure to the HVC.
NOTE: A rotatable base plate allows for user desired orientation of the instrument. The base plate is
removed using a 5/32 hex wrench to remove four bolts. The INSTRUMENT may then be re-installed
with a different orientation. The base plate MUST maintain its original position and be positioned
toward the front of the meter indicated by a drill spot on the top of the base plate. CAUTION: TO
PREVENT DAMAGE TO THE METER DO NOT CHANGE ORIENTATION OF THE BASE PLATE
ON THE METER. ONLY CHANGE ORIENTATION OF THE INSTRUMENT.