Kobold BVO Series User manual

bvo_manual FM Rev. 5/25/06
BVO Model Number Information
Range
GPM Water Fittings NPT Pressure Loss @ Max Flow
PSIG
Model Number
Brass 304 SS
0.1-1.0 1/4” 0.9 BVO-6102 BVO-6202
0.2-2.0 1/4” 1.4 BVO-6106 BVO-6206
1.0-5.0 1/2” 1.1 BVO-6116 BVO-6216
1.0-13 1” 2.1 BVO-6150 BVO-6250
Option Suffix “U” SPDT switch in place of the N/O switch
Installation Precautions
User's Responsibility for Safety: it is the user's responsibility
to select the instrument that is appropriate for the application, to
install it per these installation instructions, to perform tests of
the installed system, and to maintain all components. The
failure to do so could result in property damage or serious
injury.
Temperature and Pressure: The BVO is designed for use in
application temperatures from -10 to 212°F, and pressures to
145 PSIG. Operation outside these limitations will cause
damage to the unit and possible personal injury.
Flammable, Explosive and Hazardous Applications: The
switch provided with the BVO is not of an explosion proof
design. If the unit is to be used in an area where risk of
explosion exists, the switch must be connected via an
appropriately selected and installed intrinsic safety barrier.
Material Compatibility: Check your model number with the
wetted materials specification. Make sure that the model
which you have selected is chemically compatible with the
application liquids.
Proper Installation and Handling: Use a proper sealant with
all installations. Never overtighten the unit within the fitting.
Never use the housing to thread the unit into its fitting.
Always use only an appropriate sized wrench on the hex
portion of the body. Ensure that the piping is rigidly supported
at the inlet and outlet of the meter. Always check for leaks
prior to system start-up.
Make a Fail-safe System: Design a fail-safe system that
accommodates the possibility of switch failure as well as
operator error. In critical applications, KOBOLD recommends
the use of redundant backup systems and alarms in addition
to the primary system.
Specifications
Accuracy: ±12% of full scale
Repeatability: ±2% of full scale
Media: Water-like liquids
Fittings: NPT
Wetted Parts:
Brass Meters: Nickel-Plated Brass, Buna-N, Glass
SS Meters: 304 SS, Viton, Glass
Temperature Range: -10 to 212°F
Maximum Pressure: 145 PSIG
Flow Direction: Vertical, flow bottom to top
N/O Switch Specifications:
Max. Voltage:240 VAC, 200 VDC
Max. Current: 1.5 Amp AC, 1.0 Amp DC
Max. Power: 50 VA, 50 Watts
Switching Hysteresis: 4-8 mm of float travel
SPDT Switch Specifications:
Max. Voltage: 240 VAC
Max. Current: 0.8 Amp AC
Max. Power: 30 VA
Switching Hysteresis: 4-8 mm of float travel
BVO Series
Flowmeter and Switch
Installation Instructions
KOBOLD Instruments Inc.
1801 Parkway View Drive
Pittsburgh, PA 15205
1-412-788-2830
Fax: [phone]
www.koboldusa.com

Electrical Connections
Normally Open SPST Contact SPDT Contact
Adjusting the Switch Setpoint
Adjusting to Switch on Increasing Flow
Adjust the setpoint as follows:
1. Loosen the hold-down screws on the reed contact housing.
2. Slide the contact upwards along its rail until it reaches the stop.
3. Open the medium feed line and set flow to desired volume.
4. Slide the reed contact downwards until the contact actuates.
5. Tighten the hold-down screws.
6. Step 3 may be simulated by moving the float to the desired flow setpoint using a non-metallic
object (such as an ink pen) and adjusting the switch setpoint prior to installing the meter into the
process piping.
Adjusting to Switch on Decreasing Flow
Adjust the setpoint as follows:
1. Loosen the hold-down screws on the reed contact housing.
2. Slide the contact downwards (toward inlet) along the rail until it reaches the stop. The reed contact
will be actuated at this point.
3. Open the feed line and introduce flow until the reed contact deactuates, then lower the flow value
to the desired minimum.
4. Slide the contact upwards (toward outlet) until the reed contact actuates again.
5. Tighten the hold-screws.
6. Step 3 may be simulated by moving the float to the desired flow setpoint using a non-metallic
object (such as an ink pen) and adjusting the switch setpoint prior to installing the meter into the
process piping.
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