Kobold VKA-*102 series, VKA-*104 series, VKA-*106 series, VKA-*108 series, VKA-*110 series User Instructions

KOBOLD VKA FLOWMETER/SWITCH

User Instructions

Manual-VKA_03-04

Table of Contents

1.0 General . . . . . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . 1

2.0 Specifications . . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . 2

3.0 Principle of Operation . . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . 5

4.0 Installation Instructions. . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . 5

4.1 Mounting . . . . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . 5

4.2 Adjusting the Set point for Increasing Flow. . . . . . . . . . . . . . . . . . . . 6

4.3 Adjusting the Set point for Decreasing Flow . . . . . . . . . . . . . . . . . . 6

4.4 Contact Protection . . . . . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . 7

5.0 Arrival of Damaged Equipment . . . . . . . .. . . . . . . . . . . . . . . . . . . . . 7

6.0 Need help with your VKA? .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . 7

VKA

List Of Diagrams

Diagram 2.3 Dimensions . . . . . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . 3

Diagram 2.4 Wiring of the Reed Switch . . . . . . .. . . . . . . . . . . . . . . . . . . . . 4

Diagram 2.6 Contact Protection . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . 7

List of Tables

Table 2.1 Material Composition. . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . 2

Table 2.2 Operational Limits . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . 2

Table 2.5 Electrical Data and Operational Limits. . . . . . . . . . . . . . . . . . 4

FM Revision 3/24/04

1VKA

KOBOLD VKA FLOWMETER

User Instructions

CAUTION: For safety reasons, please read the cautionary information located at

the end of the manual, before attempting installation.

1.0 __General

The KOBOLD VKA is a viscosity compensated flowmeter intended for use in applications
where changing viscosities of the measured media make flow determination difficult.

The VKA offers viscosity independent behavior for fluids in the range of 30-300 cSt (full
compensation). Ordinary float-type flow meters experience measurement errors of up to
1000% with this type of a viscosity change in the medium.

At a glance, the special features of the VKA are:

• Viscosity compensated for ∆v = 300 cSt (mm²/s) enabling use of same scale - no
need for recalibration.

• Density compensated for ∆p = 0.5 kg/l, enabling use of same scale - no recalibration
needed.

• Can be installed in any position.

• Can accurately measure flow of a wide range of media without recalibration.

• Compact.

• Up to 4 contacts availabe upon special request.

• Hermetic separation between media and indicator/ electronics.

• Suitable for dark and turgid liquids.

• Easy installation.

• Low Cost & Reliable.

FM Revision 3/24/04

VKA 2

2.0 __ Specifications

Table 2.1; Material Composition

Material: Brass

Housi ng

Spring

Orifice

Magnet

Connections

Float

Seal

Nickel-plated Brass

301 Stainless Steel

301 Stainless Steel

Ceramic Oxide

Nickel-plated Brass

Brass

PTFE

Viscosity Range: v = 30-300 cSt (mm²/s)

Maximum Medium Temperature: 212° F

Maximum Internal Pressure: 3600 PSIG

FM Revision 3/24/04

Table 2.2; Operational Limits