Kobold KEL Series User manual

In order to obtain a fully developed flow profile through the
instrument, the pipe run should be straight and should not
contain any elbows bends or fittings. A free pipe run of 10-
15 times the pipe bore upstream and 5 times downstream
of the meter is recommended. Hose connection with area
reducing hose nipples, if desired, should be installed only
after this run.
Filtration
The meter can be installed in any orientation, but should
not be installed with the diaphragm housing at the bottom
of the pipe, since the housing may then function as a
collection point for dirt. If there is a risk that the liquid may
contain dirt particles which are larger than the pressure
sensing ports, a filter must be installed in the system
upstream of the meter.
Switchpoint Adjustment
Unless otherwise specified on ordering, units are delivered
with the switches adjusted so that one switch is set to the
minimum flow value (“1” on adjusting dial) and one at
maximum flow (“5” on the adjusting dial.) These values can
be reset as follows:
1. Undo the 2 screws which retain the cover on the top of
the meter housing. This renders the adjusting dials
accessible.
2. The adjusting dials are marked 1 through 5. The 1
through 5 indexing of the dial divides the flow
measuring range into 5 equal parts. If it is desired to
have a switchpoint at 50% of maximum flow the switch
adjusting dial would be adjusted to 2.5, etc. An
adjusting tool is included with the unit and is clipped
inside the cover. Adjust the switchpoint with the
adjusting tool.
The wiring diagram above illustrates the switching status
when the flow is zero.
Change of Measuring Range
The brass threaded and brass ANSI wafer units can have
their measuring ranges easily modified in the field by
simply replacing the measuring orifice and scale. To
replace the orifice, undo the through bolts which clamp the
meter between the flanges in the pipe work. Remove one
of the spacer rings which hold the orifice flange in place.
On the wafer style units, the spacer rings are fixed by
means of 2 screws. Replace the orifice flange with a new
one and then replace the spacer ring. Keep in mind that the
measuring scale will also need to be replaced with one
which has the correct new range on it. Stainless steel
threaded and stainless steel wafer style units do not have
interchangeable orifices. They require a new pipe section
or wafer body in order to change the range.
Installation in Piping
KOBOLD Series KEL Installation and Operating Instructions
Manual-KEL_9-05
FM Rev. 9/13/05

Changing The Installation Orientation
Unless otherwise specified upon ordering, the meters are
delivered for horizontal installation, flow to the right. If the
installation orientation is to be changed, proceed as
follows:
1. Remove the protective glass.
2. Push the pointer in towards the dial face and upwards
in the direction of the slot. Lift, and pass the round hole
in the pointer over the center of the pointer hub.
3. Undo the two screws which hold the dial face in
position, turn the dial face 90° in the desired direction
and replace the screws.
4. Replace the pointer. The pointer hub and the hole in
the pointer are square. The pointer can therefore be
mounted in four different positions. Make sure the
correct position is chosen. When the meter is
stationary, the pointer tip should point towards the
beginning of the orange “flow = 0” section on the dial
face. Make sure that the pointer is pushed by the
spring so that it is engaged by the pointer hub.
Changing the Flow Direction
If the installation orientation of the meter is changed, the
flow direction selector may have to be changed also. This
can be accomplished on brass units as follows:
1. Undo the four hex head screws which attach the
diaphragm housing to the pipe fitting.
2 The flow direction selector is now accessible and can
be replaced by undoing the two screws which hold it in
place. Remove the selector.
3. Replace the old selector with the new one. Make sure
that all four O-rings are in place, and then refit the
screws.
4. Finally, change the direction on red arrow on the outer
flow body by 180° to reflect the new flow direction
Note:
Flow direction selector R is used for installation orientations
having flow horizontal-to-the-right, vertical-up-dial-left-of-
pipe, or flow vertical-down-dial-right-of-pipe.
Flow direction selector L is used for installation orientations
having flow horizontal-to-the-left, vertical-up-dial-right-of-
pipe, or flow vertical-down-dial-left-of-pipe. Flow direction
changes for the stainless steel threaded and stainless steel
wafer style units require new. They require a new pipe
section or wafer body in order to achieve a flow direction
change.
4-20 mA Output Transmitter
The KEL-8000 and KEL-9000 series meters features a 4-
20 mA output transmitter which transmits a current signal
directly proportional to flow. Unlike traditional 4-20 mA
systems, the KEL’s output corresponds to the following
definition of flow versus current:
4 mA = Minimum of flow range
1/5 of Max. flow for 5:1 turndown meters
1/2 of Max. flow for 2:1 turndown meters
20 mA = Maximum of flow range.
This modification to the typical protocol affords the user the
maximum possible current range and resolution in the
transmitted signal
Wiring Diagram KEL-8000/9000 Series
2:1
5:1
Manual-KEL_9-05
FM Rev. 9/13/05