PKP DS15 Manuel utilisateur

Instruction Manual

DS15

Plastic Variable Area Flowmeter

PKP Prozessmesstechnik GmbH

Borsigstraße 24

D-65205 Wiesbaden- ordenstadt

Tel.: ++49-(0)6122-7055-0

Fax: ++49-(0)6122-7055-50

Email: [email protected]

Safety Information

General Instructions

The device should only be operated according to the specifications in the instruction manual. The

requisite Health & Safety regulations for a given application must also be observed. This also aplies

to the use of accessories.

Proper Usage

The flowmeters model DS15 works according to the proven variable area principle. The float is

moved upward by the flowing medium and its upper edge indicates the flow rate by means of a

scale affixed onto the measuring tube.

By using a float with an integrated magnet optional alarm contacts or an analogue output transmitter

may be operated. All flowmeters have a male thread on the measuring tube and are additionally

equipped with PVC glue-in connectors. Also possible are connectors with female thread (BSP)

made of PVC, PP, PVDF, brass or st. steel.

Qualified Personnel

DS15 devices may only be installed by trained, qualified personnel who are able to mount the

devices correctly. Qualified personnel are persons, who are familiar with assembling, installation,

placing in service and operating these devices and who are suitably trained and qualified.

DS15 Instruction manual 2017-08 page 2

Mounting

Installation Position: vertical, direction of flow from bottom to top

WAR I G:

•Ensure that in case of a break in the measuring tube, no hazards result from escaping media.

•Do not use measuring tube made of PVC for gaseous media.

•Use personal protective equipment when carrying out any work on the fitting.

To avoid unstable float conditions (fluttering of float), please include in front of the flow meter and

behind it a flow-calming section of 5 to 7 x D .

Installation:

1. Ensure that measuring tube and float are clean and free of foreign matter.

2. Remove transport lock (holds the float).

3. Ensure that the float can move freely.

4. Unscrew both union nuts. Secure float (heavy) from falling

5. Push union nuts onto spigot of process pipes. Check mounting direction.

6. Weld union end of device to spigot of process pipes

7. Check fit of O-rings

8. Connect device to the process pipework. Tighten union nuts by hand only.

Performing t e ydrostatic test:

Perform hydrostatic test using neutral medium, e.g. water.

Pressurize the device, ensuring

•Test pressure < 1.5 x P ( ominal pressure)

•Test pressure < P + 5bar

•Test pressure < permissible system pressure

Check that the device is not leaking.

DS15 Instruction manual 2017-08 page 3

Read measurement

For the measurement range 2,500-25,000, the reading edge is below the float fixture (largest dia-

meter)

1 = Reading edge

read measurement using face (1) of float

Maintanance

1. Clean device with a damp cloth as often as necessary (depends on degree of contamination

and environmental conditions)

2. Visual and function check (every 6 months):

- ormal operating conditions unchanged

- o leaks

- Measuring tube and float for deposits or changes to surface

- float is movable

3. To clean the flowmeter, in the most cases you can flush the device with clear water. In some

cases some commercial detergents can be used.

DS15 Instruction manual 2017-08 page 4

Electrical Connection of Reed contacts

Please note: we recommend to use only shielded cables.

The polarity of the connections has no influence on the function

Operating note:

•Do not exceed the current data or the switching capacity. For this reason, always fit a contact

protection relay if a power circuit is intended.

•Prior to commissioning/first start-up it is important that the float passes the switch three

times in order to cancel out any possible monostable behaviour.

•

Pin Assignment

DS15 Instruction manual 2017-08 page 5

Connecting devices equipped with Reed switches

Reed switches are basically designed for small contact ratings. To connect a load with higher power

consumption it is indispensable to use a contact protection relay (e.g. our series MSR01)

If you connect directly a load to a Reed contact the following recommendations should be con-

sidered.

one of the contact rating values printed on the switching unit must not to be exceeded, even mo-

mentarily. This is valid for each of the given values individually: voltage, current, power. The Reed

contact integrated in the switching unit is very sensible to electrical overload

Danger of overload is given by the following applications:

•inductive load

•capacitive load

•lamp load

Inductive Load

Inductive loads consist e.g. of relay, contactors, solenoid valves, motors, electric engines, etc.

WAR I G: Voltage spikes at shut down (up to 10 times of nominal voltage)

Protective measures: (examples)

(Flyback diode, e.g. type 1 4007)

Capacitive Load

Capacitive loads consist e.g. of long connection cables or capacitive consumers.

WAR I G: High current spikes at switching on (this will exceed the nominal current)

Protective measures: (examples)

Limitation of current by a resistor

Lamp Load

Lamp loads consist e.g. by light bulbs, starting motors .

WAR I G: High current spikes at switching on, because the glowing spiral has low resistance

at low temperature.

Protective measures: (examples)

Limitation of current by a resistor or

preheating of the glowing spiral.

DS15 Instruction manual 2017-08 page 6

Connecting to a PLC

There is no need for protective measures by connecting the Reed switch to a PLC. The Reed con-

tacts are plated by Tunsten, Gold, and Rhodium located in a protective atmosphere. They can be dir-

ectly connected to the input terminals of a PLC without problems.

RC-Circuits as protective measures Boucherot cell, Snubber)

In practice the following values of resistor/capacitor cells give good results. evertheless, the values

given in the following tables are only recommendations for general purposes. But it cannot be guar-

anteed that for specific applications more adequate Boucherot cells may exist.

For Reed switches of 10 – 40 VA

Voltage [V] Resistance [Ohm] apacitance [nF]

230 1500 330

115 470 330

48 220 330

24 100 330

For Reed switches of 40 – 100 VA

Voltage [V] Resistance [Ohm] apacitance [nF]

230 1000 330

115 470 330

48 100 330

24 47 330

DS15 Instruction manual 2017-08 page 7

Flow data sensor ZE 3000

micro-processor controlled for accurate flow

measurement and evaluation

330501 - 05/06

Product description

The ZE3000 emits a 4..20 mA signal according to

industrial standards, generated in the DS15 by the

precise magnet angle detection of the magnetic

float.

Existing flowmeters (with magnetic floats) can be

easily retrofitted with the ZE3000 to electrically

signal the flow and, for instance, to further process

the values in a PLC for process control or to directly

display the flow rate.

This micro-processor controlled unit is programmed

for the DS15 concerned! This guarantees accurate

flow measurement and evaluation.

IMPORTANT: The DS15 to which the ZE3000 is to be

fitted must be known in advance!

Features:

• 2-wire technology

• 4..20mA analog output

• 8..28VDC input

• Individual programming adapted to the DFM

• 11 point calibration

• non-volatile value storage

• 0 button to compensate for the surrounding

magnetic influences

• Factory setting of the lower limit value (low-cutoff)

0..99% according to customer’s specifications

• Factory settable time lag (low-pass-filter)

0.1...2.5 sec according to customer’s specifications

• Measuring accuracy better than 0.5%

Pin 1: 8..28VDC

Pin 2: GND

Installation

Screw clamps are used to fit the ZE3000 on the

dovetail guide of the flowmeter. The plug connector

is located in the upper section.

During installation, ensure that the notch of the

ZE3000 coincides with the 50% mark on the DFM

scale.

Following this, proceed with the wiring according to

the plug assignment plan.

Plug assignment

Start-up

Once installed and the voltage is applied, press the

0 button for at least 2 sec to compensate for

surrounding magnetic influences.

During this phase ensure that the float is in its

bottom position, i.e. no flow must take place!

Concealed 0 button

330501 - 05/06

PARAMETERS MIN. TYPE MAX. Unit

Voltage supply 8 28 Volt DC

Output current 0% -> 100%+overrange

During normal function (pin 1 – pin2) 4.0 -> 20.1 4.0 -> 21.0 4.0 -> 22.0 mA

Ambient temperature -30 (-20) 65 (150) ºC (°F)

Dimensions

Note:

Do not actuate the button during normal operation.

Electrical/mechanical parameters

Flow Measurement and Monitoring

DS15

Plastic Variable Area Flowmeter

•for liquid and gaseous media

•simple and robust construction

with high reliability

•measuring tubes in PV , PA, PSU

und PVDF

•low pressure drop, simple mounting

•scale with high resolution

•alarm contacts or analogue output

optionally

•optional special scales are available

depending on medium properties

•ranges air: 0,2...1 Nm³/h - 700...2900 Nm³/h

ranges water: 3...24 l/h – 10.000-50.000 l/h

•Pmax: 10 bar, Tmax: 110 °

Description:

The flowmeters model DS15 works according to the proven

variable area principle. The float is moved upward by the flow-

ing medium and its upper edge indicates the flow rate by

means of a scale affixed onto the measuring tube. y using a

float with an integrated magnet optional alarm contacts or an

analogue output transmitter may be operated.

All flowmeters have a male thread on the measuring tube and

are additionally equipped with PVC glue-in connectors. Also

possible are connectors with female thread ( SP) made of

PVC, PP, PVDF, brass or st. steel.

Typical applications:

The variety of different materials used and the simple to

exchange measuring scales make these meters universally

suitable for most liquid and gaseous media, also suitable for

very aggressive media. Main applications are in the water

treatment industry, in waste water applications, chemical and

food industry and many more.

PKP Prozessmesstechnik GmbH

orsigstr. 24 • D-65205 Wiesbaden

S +49 (0) 6122-7055-0 • T +49 (0) 6122 7055-50

[email protected] • www.pkp.de

20181120

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