Kobold DRH Series User manual
Operating Instructions
for
Rotating Vane Flow Meter
Model: DRH-...
DRH
page 2 DRH 01/0422
1. Contents
1. Contents ........................................................................................................ 2
2. Note .............................................................................................................. 3
3. Instrument Inspection .................................................................................... 3
4. Regulation Use ............................................................................................. 3
5. Operating Principle ........................................................................................ 4
6. Mechanical Connection ................................................................................. 4
6.1. Check service conditions: .................................................................... 4
6.2. Installation ............................................................................................ 4
7. Electrical Connection .................................................................................... 5
7.1. General ................................................................................................ 5
7.2. Output electronics: Frequency output (..F300;..F320, ..F340) ............. 5
7.3. Output electronics: Analogue output (..L303, ..L342, ..L343, ..L442) ... 6
7.4. Cable outlet with M12x1 angle plug electronic options F3x and L3x .... 7
7.5. Compact electronics: (..C30R, ..C30M, ..C34P, ..C34N) ..................... 8
8. Commissioning – Output electronics ............................................................. 9
8.1. General ................................................................................................ 9
8.2. Setting - compact electronics ............................................................... 9
9. Maintenance ................................................................................................. 9
10. Technical Information .................................................................................... 9
10.1. Sensor Data ......................................................................................... 9
10.2. Output electronics .............................................................................. 10
11. Order Codes ............................................................................................... 11
12. Dimensions ................................................................................................. 12
Manufactured and sold by: KOBOLD Instruments Inc.
1801 Parkway View Drive
Pittsburgh PA 15205-1422
Tel.: 412-788-2830
Fax: 412-788-4980
E-Mail: [email protected]
Internet: www.koboldusa.com
DRH
DRH 01/0422 page 3
2. Note
Please read these operating instructions before unpacking and putting the unit
into operation. Follow the instructions precisely as described herein.
The instruction manuals on our website www.koboldusa.com are always for
currently manufactured version of our products. Due to technical changes, the
instruction manuals available online may not always correspond to the product
version you have purchased. If you need an instruction manual that
corresponds to the purchased product version, you can request it from us
free of charge by email (info.@koboldusa.com) in PDF format, specifying the
relevant invoice number and serial number. If you wish, the operating
instructions can also be sent to you by post in paper form against an applicable
postage fee.
The devices are only to be used, maintained and serviced by persons familiar
with these operating instructions and in accordance with local regulations
applying to Health & Safety and prevention of accidents.
When used in machinery, the flow meter should only be placed in operation if the
machine in use complies with the EEC machinery guidelines.
According to PED guideline 2014/68/EU
No CE marking, see Article 4, Section 3 "Sound engineering practice", Guideline
2014/68/EU
Diagram 8, Piping systems, Group 1 Hazardous fluids
3. Instrument Inspection
Instruments are inspected before shipping and sent away in perfect condition.
Should damage to a device be visible, we recommend a thorough inspection of
the delivery packaging. In case of damage, please inform your parcel service/
forwarding agent immediately, since they are responsible for damages during
transit.
Scope of delivery:
The standard delivery includes:
Rotating Vane Flow Meter model: DRH-...
4. Regulation Use
Any use of the DRH which exceeds the manufactures specification may invalidate
its warranty. Therefore, any resulting damage is not the responsibility of the
manufacturer. The user assumes all risk for such usage.
DRH
page 4 DRH 01/0422
5. Operating Principle
KOBOLD Rotating Vane Flow Meters series DRH are used for measuring and
monitoring low viscous liquids.
Series DRH flow meters are working according the well-known rotating vane
principle. A magnet fitted in the vane and hermetically sealed from the medium
transfers non-contacting the rotary motion to a Hall-effect sensor mounted in the
housing. The sensor converts the rotary motion which is proportional to the flow
to a frequency signal. A series-connected electronics unit converts the signal to
an analogue output, limit contacts or display.
These devices can be adapted to prevailing plant conditions with the 360°
rotatable screw connections.
6. Mechanical Connection
6.1. Check service conditions:
Flow rate
Maximum operating pressures
Maximum operating temperature
Attention! Overrange can cause damage to bearings and cause
major measuring errors.
6.2. Installation
It must be ensured that the instrument housing is continuously filled with the
flow medium, especially for flows from top to bottom. No straight lengths are
necessary at inlet and outlet connections.
Check that flow is in the direction of the arrow on the front of the unit, and that
the face of the unit is aligned in the vertical plane (axle in horizontal plane)
Avoid pressure and tensile loads
Mechanically secure the inlet and outlet lines 50 mm from the connection
Check connections for leaks.
DRH
DRH 01/0422 page 5
7. Electrical Connection
7.1. General
Attention! Make sure that the voltages in your plant correspond
with the flow meter voltages.
Make sure that all electrical supply lines are de-energised.
Connect supply voltage and output signal to the plug connector pins as shown
below.
We recommend a power supply cable with diameter 0.25 mm².
Attention! The instrument electronics may be damaged if the cable
connections are assigned incorrectly.
7.2. Output electronics: Frequency output (..F300;..F320, ..F340)
1
2
34
+Vs
Signal
Out
n.c.
GND
DRH
page 6 DRH 01/0422
7.3. Output electronics: Analogue output (..L303, ..L342, ..L343,
..L442)
3-wire (..L303, ..L343)
2-wire (..L342)
1
2
34
S+
S-
n.c.
n.c.
+Vs
GND
1
2
34
+Vs
Signal
Out
n.c.
GND
+Vs
GND
DRH
DRH 01/0422 page 7
2-wire, DIN plug connector (..L442)
7.4. Cable outlet with M12x1 angle plug electronic options F3x
and L3x
When using a pre-assembled M12x1 connection cable with angled plug, the
cable outlet is always aligned opposite to the flow direction.
+Vs
GND
1
2
3
S+
S-
PE n.c.
DRH
page 8 DRH 01/0422
7.5. Compact electronics: (..C30R, ..C30M, ..C34P, ..C34N)
7.5.1. General
Attention! Make sure that the voltages in your plant correspond
with the flow meter voltages.
Make sure that all electrical supply lines are de-energised.
Connect supply voltage and output signal to the plug connector pins as shown
below.
We recommend a power supply cable with diameter 0.25 mm².
Attention! The instrument electronics may be damaged if the cable
connections are assigned incorrectly.
7.5.2. Compact electronics: (..C30R, ..C30M)
7.5.3. Compact electronics: (..C34P, ..C34N)
The clamps 3 and 5 are short-circuited and can therefore be used optional for the
output signal or power supply.
DRH
DRH 01/0422 page 9
8. Commissioning – Output electronics
8.1. General
The measuring instruments are preset and are ready for operation after electrical
connection.
8.2. Setting - compact electronics
See
Operating instructions supplement
for compact electronics with frequency output
9. Maintenance
If the medium to be measured is clean, the Model DRH is virtually maintenance-
free. It is particularly important to guard against contamination by ferritic (iron
metal) contaminants. These can be eliminated by using e.g. the KOBOLD
magnetic filter, model MFR.
However, if the sensor must be cleaned, it can be opened to gain access to the
internal parts. Make sure that the sensor and, especially, the blades are not
damaged during this procedure. When re-assembling, be certain that the vane is
carefully positioned and oriented correctly.
Work on the sensor and electronics should only be carried out by the
manufacturer, otherwise the guarantee is nullified.
Material
Combinations DRH-11 DRH-12 DRH-14 DRH-15 DRH-17 DRH-18 DRH-19
Housing Brass Brass 316L SS 316L SS POM POM PVDF
Housing Cover Acrylic Brass Acrylic 316L SS Acrylic POM PVDF
O-ring NBR NBR FKM FKM NBR NBR FKM
Paddle PTFE PTFE PTFE PTFE PTFE PTFE PTFE
Axle Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic
Axle Support PTFE PTFE PTFE PTFE PTFE PTFE PTFE
Max. Temperature 176 °F 176 °F 176 °F 176 °F 176 °F 176 °F 176 °F
Max. Pressure 230 PSIG 580 PSIG 230 PSIG 580 PSIG 230 PSIG 230 PSIG 230 PSIG
Weight (3/8") 1.87 LB 2.20 LB 1.98 LB 2.31 LB 0.55 LB 0.55 LB 0.66 LB
Weight (1") 3.53 LB 4.41 LB 3.53 LB 4.41 LB 0.88 LB 0.88 LB 1.10 LB
Material Combinations
10. Technical Information
10.1. Sensor Data
±2.5 % f. s.
±5% f. s. (DRH-...F300)
plug connector DIN 43 650,
plug connector M12x1, cable
max. 1 bar at max. range
IP 65
Linearity:
Electrical connection:
Pressure loss:
Protection:
DRH
DRH 01/0422
page 10
10.2. Output electronics
Frequency output (…F300)*
Power supply: 12-28 VDC
Power consumption: 10 mA
Pulse output: PNP, open collector, max. 25 mA
Electrical connection: plug connector M12x1
* uncalibrated signal output
Frequency output with frequency divider
Power supply: 24 VDC ±20%
Power consumption: 15 mA
Pulse output: PNP, open collector, max. 25 mA
Electrical connection: plug connector M12x1
Division ratio: 1...1/128, factory setting
Analogue output (plug-on display option)
Power supply: 24 VDC ±20%
Output: 0-20 mA or 4-20 mA, 2-wire or 3-wire
Max. load: 500 Ω.
Electrical connection: plug connector M12x1 or DIN 43 650
Option: plug-on display (with plug connector DIN 43 650
and output 4-20 mA only), 2-wire
Compact electronics
Display: 3-segment LED
Analogue output: (0)4 -20 mA adjustable, max. 500 Ω
Switching outputs: 1 (2) semiconductor PNP or NPN, factory set
Contact operation: N/C / N/O contact frequency programmable
Setting: with 2 buttons
Supply: 24 VDC ±20%, 3-wire technology,
approx. 100 mA
Electrical connection: plug connector M12x1
DRH-...Exxx (Counter electronics)
Display: LCD, 2x8 digits, illuminated
Total, part and flow quantities,
units selectable
Quantity meter: 8 digit
Analogue output: (0)4...20 mA adjustable
Load: max. 500 Ω
Switching output: 2 relays, max. 30 VAC/DC/2 A/60 VA
Settings: via 4 buttons
Functions: Reset, MIN/MAX memory, flow monitor,
monitoring for part and total quantity, language
Power supply: 24 VDC ± 20%, 3-wire
Power consumption: approx. 150 mA
Electrical connections: cable connection or M12 plug
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