Volumetric flow measurement

The volumetric flow rate refers to the volume of flow per fixed amount of time.
The volumetric flow rate can be easily measured by installing the FP series flow detectors in the flow path and combining them with the digital flow meter FM-3100 or DF-2200.
Since the volume changes (expansion/contraction) depending on temperature, it is important to control temperature during measurement.

Flow detectors/ Flow meters

1. Volumetric Type Flow Detector

  • Long-term continuous measurement
  • Low pressure loss
  • Suitable for on-board measurement

 

There are 3 tpes of detectors as follow:

Standard type FP-5000 series

  • Achieves pulse resolution up to 20 times that of the existing models
  • Various detector lineup supports wide flow range
  • Realizes space saving by integrated connection
  • Applicable to alcohol mixed fuel as standard

Pressure loss compensation type FP-213S/2140S

  • Driven by a motor so that the free piston inserted into the detector's bypass tube is located at the neutral position.
  • High accuracy within ± 0.2 % of reading over the entire flow measurement range

On-board type FP-4135

  • Small and light weight, ideal for on-board measurement
  • Super wide range ability: 1:2000
  • Vibration resistance improved
  • Applicable to alcohol mixed fuel as standard

 

 

2. Digital Flow Meter

There are two types of digital flow meters: standard type and on-board type.

FM-3100 Digital Flow Meter

  • High-speed response at 1 ms (analog/CAN)
  • Applicable to FP series Volumetric Flow Detectors, FX series Mass-Burette Flow Detector and FZ series Coriolis type Mass flow Meter
  • Equipped with the density correction function, various calculation functions

DF-2200 On-Board Fuel Flow Meter

  • Compact body optimum for on-board testing
  • Wide power input range from 12 to 24 VDC corresponding to various test vehicles

 

Specifications Digital Flow Meter FM-3100 On-Board Digital Flow Meter DF-2200
Applicable detector FP series/ FD-5110/ FX series/ FZ series
* Please select the compatible module (sold separetely) with each detectors.
FP-4135/MF-3200/FP-213S/2140S
FP-5131/5133, FP-5141/5143
Power source AC100 V to 240 V ± 10 % 80 VA or less
(when connected to the FP-2140S and the FM-3100)
DC10 to 28 V, 28 VA or less
Operating temperature range 0 to +50 °C 0 to +50 °C *Operating temperature range of AC adapter is 0 to +40 °C.
Operating humidity range 10 to 85 % (without condensation) 5 to 80 %
Storage temperature range -10 to +60 °C -10 to +60 °C
Storage humidity range 10 to 85 % (without condensation) 5 to 85 %
Outer dimension 240(W)× 99(H)× 297(D) mm *The projection is not included. 170(W)× 49(H)× 120(D)mm *The projection is not included.
Weight Approx. 3 kg Approx. 800 g
Conforming standard CE marking (FM-0311)
LVD Directive 2014/35/EU Standard EN61010-1
EMC Directive 2014/30/EU Standard EN61326-1 ClassA Group1
RoHS Directive 2011/65/EU Standard EN50581
LVD Directive 2014/35/EU Standard EN61010-1 (with AC adapter) (with AC adapter)
EMC Directive 2014/30/EU Standard EN61326-1
RoHS Directive 2011/65/EU Standard EN50581
Measurement items Time/ temperature/ pressure
Module for FP/FD : instantaneous flow rate, instantaneous density
Module for FZ : instantaneous flow rate, instantaneous density
Module for FX : instantaneous flow rate
Instantaneous flow rate/time / temperature/ pressure/ integrating flow rate
Accessory AC power cable, FM-0012 analog output conversion adapter (D-Sub to BNC 0.5m), instruction manual DC power cable with clamp

 

Temperature Sensors

Temperature/pressure sensor unit for FP-5000 seires as option

FP-5000 series Volumetric Flow Detectors

In volumetric flow rate measurement, it is important to measure the temperature at the time of measurement together with the flow rate.
Temperature/pressure sensor unit for FP-5000 seires is available (as option).

 

Temperature sensor for FP-4135 as standard

FP-4135 On-board Volumetric Flow Detector

Built-in temperature sensor
Temperature measurement range : -30 °C to +100 °C
Temperature accuracy : Class A

 

Temperature sensor for Low pressure loss type

Flow detector with pressure loss compensation function

The EH-0081 temperature sensor, the EH-0082 pressure sensor are required to install when adding tempresure/pressure sensor to FP-213S, 2140S. They can be added by the block (made-to-order) instead.

 

 

Measurement principle

Four pistons are arranged radially in the flow detection unit, and move back and forth repeatedly according to the flow of fluid from the inlet to the outlet. The pistons are rotated by the crankshaft, and their movement is transmitted to the magnetic-coupled rotation detection unit. The rotary encoder mounted on the rotation detection unit generates pulse signals in accordance with the amount of piston movement, and they are calculated and displayed to obtain instantaneous flow rate/total flow rate in calculation/display section. The pulse signals generated by two pair of light-projecting/receiving elements with 90-degree phase difference are judged its rotating direction to perform accurate flow rate measurement without being affected by back-flow or pulsation.



System configuration



 

 

Case Study

Importance of temperature control in flow rate measurement

When the fuel was cooled by the heat exchanger ①, the volumetric flow rate measured by the FP-4135 increased for a instant due to the contraction of liquid caused by cooling. As for the FP-5134, it decreased due to cooling. You can see that the temperature change of the fuel affects the measurement result.

Test condition

  • - Let the fuel flow at a constant rate.
  • - Not let cooling water flow through the heat exchanger ① at firsrt.
  • - At the timing when 10 seconds have passed in the time series graph, let cooling water of 15 ℃ flow rapidly through the heat exchanger ①.

 

 

Last update:2022/03/31