Emerson Daniel Series, User Manual

Page: 46 / 106

Flow straightening devices
For accurate operation of the turbine meter, a flow conditioning plate, flow straightener
(designed for the turbine meter), or a straight run of pipe (20 pipe diameters long) is
required. All piping must be the same diameter as the turbine meter. Flow straightening
devices must be installed directly upstream of the turbine meter and should not contain
flow restricting devices which could cause reversal of the flow straightening effect.
Strainers
Install the correct size strainer upstream of the turbine meter to protect it from foreign
material damage. Recommended mesh sizes include: 80 mesh for refined products, and
20 to 40 mesh for crude products (depending on the product being measured).
Clean the strainer basket regularly, to prevent filling and rupturing of the screen.
Pressure gauges installed on both sides of the strainer monitor differential pressure across
the strainer. High pressure differential caused by filling of the basket or occlusion of
foreign material can cause a strainer basket rupture, resulting in possible turbine meter
damage.
2.2 Specifications for the LTM
2.2.1 Interface parameters
WARNING
EXCEEDING PARAMETER HAZARD
Turbine meter parameters are set for safe equipment use. Do not exceed these
parameters.
Failure to comply may result in death, serious injury and/or damage to the equipment.
Table 2-3: 2818 Dual channel preamplifier performance
Parameter type Description
Inputs Supply voltage: 10-30 VDC
Sensor type: Reluctance
Signal: Sine wave
Preamplifier sensitivity: 40 mV peak to peak minimum
Temperature range: -40 ºC to 85 ºC (-40 ºF to 185 ºF)
Outputs Powered pulse output:
• Type: Square wave
• Frequency range: 0 to 5 kHz
• Amplitude: 0 to 5 V
• 1000 Ohm internal pull-ups, 20 mA, max.
Operating conditions and specifications User manual
March 2019 P/N 3-9008-515
46 Daniel Series 1500 Liquid Turbine Meter, NPS 3-24