Kobold DRG-11, DRG-14, DRG-12, DRG-15, DRG-18 User Manual

USA

Canada

1801 Parkway View Drive
Pittsburgh, PA 15205
PH: 412-788-2830
FAX: [phone]

www.kobold.com

9A Aviation
Point-Claire, QC H9R 4Z2
PH 514-428-8090
Fax: [phone]

Precautions

• User's Responsibility for Safety: KOBOLD manufactures
a wide range of process sensors and technologies. While
each of these technologies are designed to operate in a
wide variety of applications, it is the user's responsibility to
select a technology that is appropriate for the application, to
install it properly, 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.

• Proper Installation and Handling: Use a proper sealant
with all installations. Never overtighten the sensor within its
fittings. Always check for leaks prior to system start-up.

• Wiring and Electrical: This is an electrically operated
device and only properly trained personnel should install
and maintain this product. Be sure that the power supplied
to the sensor is appropriate for the electronics supplied.
Electrical wiring should be performed in accordance with all
applicable national, state and local codes.

• Temperature and Pressure: The DRG is available in
several material combinations. Temperature and pressure
maximums vary depending upon the material selected.
Operation outside these limitations will cause damage to
the unit.

Series DRG
Paddle Flow Sensor

• Material Compatibility: The DRG process wetted
parts for the various body materials are stated below.
Make sure that the DRG is chemically compatible with
the application liquids. While the sensor’s outer housing
is liquid resistant when installed properly, it is not
designed to be immersed. It should be mounted in such
a way that it does not normally come into contact with
fluid.

• Flammable, Explosive and Hazardous Applications:
The DRG is not an explosion-proof design. It should not
be used in applications where an explosion-proof
design is required.

• Make a Fail-Safe System: Design a fail-safe system
that accommodates the possibility of sensor or power
failure. In critical applications, KOBOLD recommends
the use of redundant backup systems and alarms in
addition to the primary system.

Specifications

Accuracy: ±3.0% of full scale
Wetted Parts

DRG-11: Bronze, Acrylic, PTFE, Ceramic, NBR
DRG-12: Bronze, PTFE, Ceramic, NBR
DRG-14: 316SS, Acrylic, PTFE, Ceramic, FKM
DRG-15: 316SS, PTFE, Ceramic, FKM

DRG-18: PP, PTFE, Ceramic, NBR

Max. Pressure:

DRG-18: 100 PSIG

DRG-11, 14: 230 PSIG
DRG-12, 15: 580 PSIG

Temperature Range:

-10°F to +176°F

Electrical Protection (all versions):NEMA 4X/IP 65

Electrical (refer to model number table for model codes and

descriptions for each output type)

Output F300
PNP Pulse Output: PNP open collector, 25mA max.

Input Power: 14-28 VDC

Connection: 4 pin, M-12 Micro-DC plug, male

Electrical (continued)
Output L342: 4-20 mA, 2-wire, Rmax < 500 ohms, 24 VDC

Connection: 4 pin, M-12 Micro-DC plug, male

Output L343: 4-20 mA, 3-wire, Rmax < 500 ohms, 24 VDC
Connection: 4 pin, M-12 Micro-DC plug, male

Output L442: 4-20 mA, 2-wire, Rmax < 500 ohms, 24 VDC
Connection: DIN 43650 (Hirschmann) plug

Outputs C34P & C30R
Output C34P: 4-20 mA, 3-wire, Rmax < 500 ohms + 1 PNP

switch
Output C30R: 2 PNP switches
Power Supply: 24 VDC ±20%, 80 mA max.
Display: 3-digit LED
Switch Type: PNP open collector, 24 VDC, 300 mA max.
Connection: 5 pin, M-12 Micro-DC plug, male

PDF Rev. 12/15

DRG_manual_12-15

Part Number Decoding

Switch out 2

+ (0)4

-

20 mA

Switch out 1

Switch out 1

Flow Range

GPM Water

0.15 - 3

0.15 - 6.6

0.3 - 8

0.6 - 12

0.8 - 23

1.5 - 37
3 - 37

Part Number 807.037=Mating 4-pin Micro-DC plug with 6 ft. cable for output F300, L342, & L343
Part Number 807.007=Mating 5-pin Micro-DC plug with 6 ft. cable for output C34P, & C30R

Electrical Connection for Output F300 and L343

Nominal

freq. at

f.s. (Hz)

120
217
184
215
265
180
180

Material Combination & Flow Range Fitting Output/Electronics

DRG-11 DRG-12 DRG-14 DRG-15 DRG-18

..50
..55
..60
..65
..70
..75
..80

(3-wire transmitters)

..50
..55
..60
..65
..70
..75
..80

..50
..55
..60
..65
..70
..75
..80

..50
..55
..60
..65
..70
..75
..80

Accessories

..50
..55
..60
..65
..70
..75
..80

N2=1/4” NPT
N4=1/2” NPT
N5=3/4” NPT
N6=1” NPT

F300=Frequency output, Micro-DC plug
L342=4-20 mA, 2 wire, Micro-DC plug
L343=4-20 mA, 3 wire, Micro-DC plug
L442=4-20 mA, DIN 43650 plug
C34P=Compact Electronics,

C30R=Compact Electronics,

N1=1/8” NPT

Electrical Connection for Output C30R & C34P

(5-wire Micro-DC plug)

Cable: Brown= Pin 1; White= Pin 2; Blue= Pin 3; Black= Pin 4; Gray= Pin 5

GND

GND

24 VDC power

+

1

2

3

4

5

GND

GND

C30R

4-20 mA w/1 PNP switch

2 PNP switches

+ 24 VDC power

2

3

1
4

5

C34P

Electrical Connection for Output L342

(2-wire 4-20 mA)

+24 VDC

Mechanical Installation

Piping Preparation: Piping should be rigidly supported at both

the inlet and outlet of the sensor to prevent potential damage
due to excessive stress on the sensor fittings.

Horizontal flow direction with piping positioned above the flow
body is recommended to minimize trapped air, which can
cause output fluctuations and meter inaccuracy.

Additionally, be sure that the axle is always positioned in the
horizontal plane to minimize friction, otherwise, meter
inaccuracy and excessive paddle wheel wear can result.

In order to ensure that the fluid flow profile is fully developed
and symmetrical, a minimum straight pipe run of 20 nominal

pipe diameters upstream and 5 diameters downstream of
the sensor are required. These straight runs should be free of

tees, elbows, valves, reducers and other disturbances.
Pumps: All pumps cause pulsations in the fluid. Centrifugal

pumps cause the least amount of pulsations in the fluid and
positive displacement or reciprocating pumps cause the most.
In order to minimize the effect of these pulsations on sensor
accuracy, the sensor should be located as far away from the
pump as possible. A pulsation dampener or accumulator may
be used to dampen pulsations if required. If the fluid pulsations
cannot be reduced to an acceptable level, a field calibration to
determine the new K-factor for the sensor installed in a

pulsating system may be required.

Cable

Pin 1 = Brown = +24 VDC
Pin 4 = Black = 4-20 mA out

Electrical Connection for Output L442

(2-wire 4-20 mA)

Viscosity: All flow range and calibration data assume

water as the flow media. All paddle type transducers
are affected by viscosity and higher viscosities tend to
make the paddle wheel turn slower for a given flow
rate. This results in a lower K-factor when the sensor
is used with a viscous media (i.e. viscosity > 10 cSt.)
and the calibration data provided for water flow is no
longer valid. If the sensor is to be used with viscous
media, a field calibration is required to determine the
new K-factor for the sensor.

Field calibration: For frequency output versions, a
simple field calibration may be performed to determine
a new K-factor when the sensor is to be used in a
manner in which the above specified calibration
information does not apply (i.e. use with viscous or
pulsating media, insufficient straight run, etc.). With
the sensor installed in the system, dispense a known
quantity of the fluid to be measured while using a
pulse counter to count the number of pulses
generated during the dispense. This information can
then be used to determine the new K-factor specific to
your system and fluid. 4-20mA output and / or
Compact Electronic versions have a preset output
span that is not field adjustable.