Flow Monitor
B2900 Series
DESCRIPTION
The B2900 flow monitor incorporates state-of-the-art, digital
signal processing technology, designed to provide exceptional
flexibility at a very affordable price. Though it is designed for use
with Blancett flow sensors, this monitor can be used with almost
any flow sensor producing a low amplitude AC output or contact
closure signal.
OPERATION
This monitor can accept low-level frequency input signals typically
found in turbine flow sensors. The output signal for these types of
sensors is a frequency proportional to the rate of flow. The B2900
monitor uses the frequency information to calculate flow rate and
total flow. Through the use of the programming buttons, you can
select rate units, total units and unit time intervals among other
functions. If required, the monitor can easily be re-configured in
the field. Finally, you can choose between simultaneously showing
rate and total, or alternating between rate and grand total.
The monitor provides advanced communication capabilities over
an RS485 bus using Modbus RTU and control outputs.
The package is a polycarbonate NEMA 4X enclosure.
APPLICATIONS
The B2900 monitor is suitable for application in a wide variety of
metering needs. A few of the more common industries are:
• Secondary oil recovery applications
• Remediation and reclamation
• Fracture/refracture
• Coal bed methane
• Regulatory compliance and environmental accountability
• Industrial chemicals
• Aggressive chemical processing applications
• Semiconductor manufacturing
• Fertilizer production and dispensing
• Pesticide manufacture
• Liquid batching and water cooling
FEATURES
• Robust alarm parameters provide faster warning when
something changes in the process or pipeline.
• Greater control and greater visibility of batch operations.
• Advanced connectivity options allow you to connect
meters to your network for remote monitoring and process
automation capabilities.
• Updated display and totalization options provide more flow
information, including simultaneous display of rate and total
as well as standard, batch and grand totals.
• Various mounting options provide a B2900 model for
your operation.
PART NUMBER CONSTRUCTION
Blancett B2900 Display -
Model
Blancett B2900 Display B29
Model
Advanced A
Mounting
Meter M
Remote R
Swivel S
Handheld H
Units of Measure
Customer Selectable CS
DSY-DS-01565-EN-04 (March 2018)
Product Data Sheet
Specications
COM
SPECIFICATIONS
Simultaneously shows Rate and Total
5 x 7 Dot Matrix LCD, STN Fluid
Display
Common
6 Digit Rate, 0.5 inch (12.7 mm) numeric
7 Digit Total, 0.5 inch (12.7 mm) numeric
Engineering Unit Labels 0.34 in. (8.6 mm)
Annunciators
Alarm 1(1), Alarm 2 (2), Battery Level ( ), RS485 Communications (
Auto switching between internal battery and external loop power; includes isolation between loop power and other I/O
Power
Battery
3.6V DC lithium D Cell gives up to 6 years of service life
Note: Modbus enabled at baud rate of 19,200 or higher without loop power reduces battery life to 1 year
Loop 4…20 mA, two wire, 25 mA limit, reverse polarity protected, 7V DC loop loss
Frequency Range 1…3500 Hz
Frequency Measurement Accuracy ±0.1%
Inputs
Magnetic Pickup
Over Voltage Protection 28V DC
Trigger Sensitivity 30 mV
(High) or 60 mV
p-p
Amplified Pulse Direct connection to amplified signal (pre-amp output from sensor)
Analog 4…20 mA
4…20 mA, two-wire current loop
25 mA current limit
One pulse for each Least Significant Digit (LSD) increment of the totalizer
Outputs
Totalizing Pulse
Pulse Type
(selected by circuit
board jumper)
Maximum Voltage 28V DC
Maximum Current Capacity 100 mA
Opto-isolated (Iso) open collector transistor
Non-isolated open drain FET
Maximum Output Frequency 16 Hz
Pulse Width 30 mSec fixed
Open collector transistor
Adjustable flow rate with programmable dead band and phase.
Status Alarms
Type
Maximum Voltage 28V DC
Maximum Current 100 mA
Pullup Resistor External required: 2.2 k ohm minimum, 10 k ohm maximum
Modbus Digital
Communications
Data Configuration and
Protection
Modbus RTU over RS485, 127 addressable units / 2-wire plus ground network, selectable baud rate: 9600, 19200, 38400, 57600
or 115200, long integer and single precision IEEE754 formats; retrieve: flow rate, job totalizer, grand totalizer, alarm status and
battery level; write: reset job totalizer, reset grand totalizer
Two four-digit user selectable passwords; level one password enables job total reset only, level two password enables all
configuration and totalizer reset functions
Safety
Intrinsically Safe
Class I Division 1, Groups C, D; Class II, Division 1 Groups E, F, G
4…20 mA Loop: Vmax = 28V DC Imax = 26 mA Ci = 0.5 μF Li = 0 mH
Certifications
Entity Parameters
Pulse Output: Vmax = 28V DC Imax = 100 mA Ci = 0 μF Li = 0 mH
Reset Input: Vmax = 5V DC Imax = 5 mA Ci = 0 μF Li = 0 mH
RS485: Vmax = 10V DC Imax = 60 mA Ci = 0 μF Li = 0 mH
Turbine Input: Voc = 2.5V Isc = 1.8 mA Ca = 1.5 μF La = 1.65 H
EMC IEC61326-1; 2004/108/EC
Measurement Accuracy Common Accuracy 0.05%
Response Time
(Damping)
Common Response
Time
1…100 seconds response to a step change input, user adjustable
Environmental Limits Common Limits –22…158° F (–30…70° C); 0…90% humidity, non-condensing;
Materials and Enclosure
Ratings
Engineering Units
Polycarbonate, stainless steel, polyurethane, thermoplastic elastomer, acrylic; NEMA 4X/IP 66 meter, remote and swivel mount;
NEMA/UL/CSA Type 4X (IP-66)
Liquid
Gas
US Gallons, Liters, Oil Barrels (42 gallon), Liquid Barrels (31.5 gallon), Cubic Meters, Million Gallons, Cubic
Feet, Million Liters, Acre Feet
Cubic Feet, Thousand Cubic Feet, Million Cubic Feet, Standard Cubic Feet, Actual Cubic Feet, Normal
Cubic Meters, Actual Cubic Meters, Liters
Rate Time Seconds, minutes, hours, days
Totalizer Exponents 0.00, 0.0, X1, x10, x100, x1000
K-factor Units Pulses/US Gallon, Pulse/cubic meter, pulses/liter, pulses/cubic foot
)
(Low) - (selected by circuit board jumper)
p-p
DSY-DS-01565-EN-04Page 2 March 2018
Loading...