INTRODUCTION:
The Greyline AVFM-II Area Velocity Flow Meter measures open channel flow in pipes and other
channels. Flow calculation is based on the formula: Q = V x A. Q is flow, V is velocity, and A is the
cross-sectional area of flow volume in the pipe or channel.
The AVFM-II measures both level and velocity continuously. Level readings plus the user-entered
diameter or channel width are used to calculate the cross-sectional area. Combined with velocity
readings the AVFM-II measures the flow rate.
FUNCTION TEST:
Connect the sensor to the
TDCR
terminals as shown below, then
apply power. Allow 30 seconds for the AVFM-II to initialize.
A. Place QZ02L sensor (flat to the bottom) in a bucket of
water about 6” deep and select
Level
mode (from
UNITS/MODE
menu) to see a level reading.
B. Select
Velocity
mode and stir the water to see a
velocity reading.
CONNECTIONS:
POWER INPUT: The standard model
requires AC power input between
100-130VAC 50/60Hz (2 amp fuse is
recommended). No adjustments are
necessary for any voltage in this range.
Optional 230VAC requires power
input between 200-260VAC 50/60Hz.
(See OPTIONS section of this manual
for connection of optional 9-36VDC
power input).
IMPORTANT NOTE: To comply with
CSA/NRTL standards, AC power
input and relay connection wires must
have conduit entry to the instrument
enclosure.
Manual Series A.10
AVFM-II Area-Velocity Flow Meter
Page 4
BAD
GOOD
L N G
AC
IMPORTANT:
MUST CONNECT TO A
GOOD GROUND (<1 Ohm)
WITH 12 AWG CONDUCTOR
100-130VAC (50/60 Hz)
OPTIONAL:
200-260VAC (50/60 Hz)
*
*
*
N.O C N.C N.O C N.C
RELAY 1
RELAY 2
RX PU GND TX
RS 232
4 - 20
FLOW
4 - 20
VLCTY
GROUND STUD
IMPORTANT:
ATTACH ALL CABLE
SHIELDS (SENSOR
AND 4-20mA)
THIS END ONLY
*
TDCR.3
TDCR.1 TDCR.2
WHT
STRIPE
GRN
STRIPE
(VELOCITY)
NO STRIPE
(LEVEL)
4 - 20
LEVEL
