Form #187 (01.15)
4500 E 142nd Street • Grandview, MO 64030 • Tel. (816) 878-6675 • Fax (816) 878-6683 • www.smartflow-usa.com
Tracer
VM
™
Operating Instructions
Applies to VM Flowmeter models.
General
The Tracer
VM
Electronic Flowmeter is a non-display flow and
temperature sensor that provides a 0.5 - 3.5 Volt output only. It is
flow-direction specific. Refer to the arrow on the body for correct
flow direction. Flow in the opposite direction of the arrow will yield
inaccurate voltage output. Flow sensor technology is vortex shedding
behind a bluff body.
Temperature
Operating Range ..........................................0 to 100°C (32 to 212°F)
Temperature Equation.......Temperature (°C) = [(100/3) * V] - (50/3)
Temperature (°F) = (60 * V) + 2
Maximum Pressure...................................................10.3 bar (150psi)
Power
Power Supply Requirements ............................5VDC ±5% (external)
max. 10 mV ripple, 50 Hz
min. output current 10mA
separated from hazardous live circuitry by
double or reinforced insulation
power limitation: 150VA; current limitation: 8A
Output signals: ................................................................. Ratiometric
Flow Signal .............................................. 0.5 - 3.5V (zero at 0.35V)
Temperature Signal............................................................. 0.5 - 3.5V
Power Consumption.............................................................. < 50mW
Load Impedance ..................................................................... > 10kΩ
Specifications
Flow
Accuracy ....................±5% of Full Range
Flow Ranges and Equations (V = Voltage)
1-15 LPM
(LPM) = [(14/3) * V] - (4/3)
.3 to 4 GPM
(GPM) = [1.233 * V] - 0.352
2-40 LPM
(LPM) = [(38/3) * V] - (13/3)
.5 to 10.6 GPM
(GPM) = [3.347 * V] - 1.145
5-100 LPM
(LPM) = [(95/3) * V] - 10.833
1.3 to 26.4 GPM
(GPM) = [8.365 * V] - 2.862
10-200 LPM
(LPM) = [(190/3) * V] - (65/3)
2.6 to 52.8 GPM
(GPM) = [16.731 * V] - 5.724
0.35V output for all ranges is equal to zero flow
Component Materials
Sensing Element.... Silicone-Based MEMS Sensor
Seal (sensor to housing) ................. EPDM Rubber
Insert..................................................... PPA 40 GF
3/8" & 1/2" Body Size..............Glass-Filled Nylon
Flow Body with
Brass or Nylon End Caps
3/4" thru 1-1/2" Body Size ....Anodized Aluminum
or Stainless Steel Flow Body
Cable ....................................4-Conductor, 24AWG
2.9M (9.5ft)
Directives
Flow sensors are in conformity with these Council
directives on the approximation of the laws of the
EC member states:
• Low Voltage Directive (2006/95/EC)
- Standards used: EN 61010-1:2001
• EMC Directive (2004/108/EC)
- Standards used: EN 61326-1:2006 and 61326-
2-3:2006
Smartflow Vortex flow sensors fall under Article 3,
§3 of PED Directive 97/23/EEC and are therefore
not required to be CE-marked according to this
directive.
