DCMV63 datasheet, PDF - EEWORLD Datasheet

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DCMV63: DescriptionIndustrial Pressure Sensors FEMA; CategoryThe sensor; File Size410KB，20 Pages; ManufacturerHoneywell; Websitehttp://www.ssec.honeywell.com/

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DCMV63 Overview

Industrial Pressure Sensors FEMA

DCMV63 Parametric

Parameter Name	Attribute value
Product Category	Industrial Pressure Sensors
Manufacturer	Honeywell
Product	Pressure Switches
Operating Pressure	16 bar to 63 bar
Pressure Type	Differential
Accuracy	< 1 %
Port Size	G 1/2, G 1/4
Operating Supply Voltage	250 VAC
Maximum Operating Temperature	+ 70 C
Minimum Operating Temperature	- 25 C
Mounting Style	Panel
Operating Supply Current	8 A
Packaging	Bulk
Pressure Port	Port
Factory Pack Quantity	1

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Mechanical pressure switches

Liquids and gases

DCM/DNM

Pressure switches and pressure monitors for overpressure

This universal pressure switch can be used in

general mechanical engineering and the printing

machine industry, as well as in pneumatics and

hydraulics.

SIL 2 according IEC 61508-2

DCM25

Technical data

Pressure connection

External thread G 1/2 (pressure gauge

connection) according to DIN 16 288 and inter-

nal thread G 1/4 according to ISO 228 Part 1.

Switching device

Robust housing (200) made of seawater-

resistant diecast aluminium GD Al Si 12.

Protection class

IP 54, in vertical position.

Pressure sensor materials

DNM025…DCM63 Metal bellows: 1.4571

Sensor housing: 1.4104

DCM025 – DCM 1 Metal bellows: Cu Sensor

housing: Cu + Ms

DCM4016/

Diaphragm: Perbunan

DCM4025

Sensor housing: 1.4301

DCM1000

Diaphragm: Perbunan

Sensor housing: Brass

Mounting position

Vertically upright and horizontal. DCM4016

and 4025 vertically upright.

Ambient temp. at switching device

–25…+70 °C, except: DCM4016,

4025, 1000: –15…+60 °C

Max. medium temperature

The maximum medium temperature at the

pressure sensor must not exceed the

permitted ambient temperature at the

switching device. Temperatures may reach

85°C for short periods). Higher medium

temperatures are possible provided the above

limit values for the switching device are

ensured by suitable measures (e.g. siphon).

Mounting

Directly on the pressure line (pressure

gaugeconnection) or on a flat surface with two

4 mm Ø screws.

Switching pressure

Adjustable from outside with screwdriver.

Switching differential

Not adjustable with DCM and types. Adjustable

from outside with DCMV types. For values see

Product Summary.

Contact arrangement

Single-pole changeover switch.

Switching

capacity

Normal

250 VAC 250 VDC 24 VDC

(ohm) (ind) (ohm) (ohm)

8A 5A

0.3 A

Type

Setting range

Switching

Max.

Materials in- Dimen-

differential

permissible contact with sioned

(mean values) pressure

medium

drawing

page 25 + 26

1 + 11

1 + 10

1 + 14

1 + 15

1 + 12

Sensor

housing

1.4104

Pressure

bellow

1.4571

1 + 18

1 + 17

Switching differential not adjustable

DCM4016

1…16 mbar

DCM4025

4…25 mbar

DCM1000

10…100 mbar

DCM025

0.04…0.25 bar

0.03

DCM06

0.1…0,6 bar

0.04

DCM1

0.2…1,6 bar

0.04

DNM025

0.04…0.25 bar

0.03

DCM506

15…60 mbar

DCM3

0.2…2.5 bar

0.1

DCM6

0.5…6 bar

0.15

DCM625

0.5…6 bar

0.25

DCM10

1…10 bar

0,3

DCM16

3…16 bar

0.5

DCM25

4…25 bar

1.0

DCM40

8…40 bar

1.3

DCM63

16…63 bar

2.0

mbar 1

mbar 10

bar

mbar 12

bar 16

bar 25

bar 60

bar 130

bar

Perbunan

+ 1.4301

Perbunan + MS

Cu + Ms

1 + 16

Switching differential adjustable

DCMV025

0.04…0.25 bar

0.03…0.4 bar

DCMV06

0.1…0.6 bar

0.04…0.5 bar

DCMV1

0.2…1.6 bar 0.07…0.55 bar

DCMV3

0.2…2.5 bar

0.15…1.5 bar

DCMV6

0.5…6 bar

0.25…2.0 bar

DCMV625

0.5…6 bar

0.25…2.0 bar

DCMV10

1…10 bar

0.5…2.8 bar

DCMV16

3…16 bar

0.7…3.5 bar

DCMV25

4…25 bar

1.3…6.0 bar

DCMV40

8…40 bar

2.6…6.6 bar

DCMV63

16…63 bar

3.0…10 bar

130

bar

Cu + Ms

Sensor

housing

1.4104

Pressure

bellow

1.4571

1 + 14

1 + 18

1 + 17

1 + 16

For smaller pressure ranges see also VCM, DGM, HCD and DPS sheets.

For additional functions refer page 30 – 32.

Calibration

The

DCM

series is calibrated for falling pressure. This means that the adjustable switching pressure on

the scale corresponds to the switching point at falling pressure. The reset point is higher by the amount

of the switching differential. (See also page 27, 1. Calibration at lower switching point).

-DCM/DNM

see page 65

Protection Class:

IP 54

Definitions

Maximum pressure monitoring

RSP = SP – xd

Switching differential

Pressure transmitters

Accessories

Solenoid valves

Flow monitors

Temperature sensors

Thermostats

The switching differential (hysteresis) is the difference in pressure between the

switching point (SP)

and the

reset point (RSP)

of a pressure switch. Switching differential tolerances occur due to

tolerances in the microswitches, springs and pressure bellows. Therefore the data in the product

summaries always refers to average values. In the case of limiter functions the switching differential

has no significance, as one is only interested in the switching point at which cutoff occurs, not the

reset point. For a

controller function,

i. e. in the case of pressure switches used to switch a burner,

pump etc.

on and off,

a pressure switch with an

adjustable switching differential

should be

chosen. The switching frequency of the burner or pump can be varied by changing the switching

differential.

Adjustable switching differential/ calibration

In the case of pressure switches with adjustable switching differential, the hysteresis can be set within

the specified limits. The switching point (SP)

and

reset point (RSP) are precisely definable. When

setting the pressure switch, the switching differential situation and the type of factory calibration must

be taken into account. Some pressure switches (e.g. minimum pressure monitors of the DCM series)

are calibrated under "falling" pressure, i.e. switching under falling pressure takes place at the scale

value with the switching differential being above it. The device switches back at scale value +

switching differential. If the pressure switch is calibrated under rising pressure, switching takes place

at the scale value and the device switches back at scale value - switching differential (see direction of

action). The calibration method is indicated in the data sheets.

Minimum pressure monitoring

RSP = SP + xd

Direction of action

In principle, any pressure switch can be used for both maximum pressure and minimum pressure

monitoring. This excludes pressure limiters, whose direction of action (maximum or minimum) is

predefined. The only thing to remember is that the scale reading may deviate by the amount of the

switching differential. See example at bottom left: The scale value is 2.8 bar.

Maximum pressure monitoring

With rising pressure,

switching takes place once the preset switching pressure is reached (SP).

The reset point (RSP) is lower by the amount of the switching differential.

Minimum pressure monitoring

With falling pressure,

switching takes place once the preset switching pressure is reached (SP).

The reset point (RSP) is higher by the amount of the switching differential.

Direction of action in vacuum range

It is particularly important to define the direction of action in the vacuum range.

Rising does not mean a rising vacuum, but rising pressure (as viewed from absolute "0"). "Falling"

pressure means a rising vacuum.

For example: Vacuum switch set to -0.6 bar falling means: Switching (SP) takes place under falling

pressure (rising vacuum) at -0.6 bar. The reset point is higher by the amount of the switching

differential (e.g. at -0.55 bar).

Setting a pressure switch

To define the switching point of a pressure switch exactly, it is necessary to determine the direction of

action in addition to the pressure. "Rising" means that switching takes place at the set value when the

pressure rises.

The reset point is then lower by the amount of the switching differential. "Falling" means exactly the

opposite.

Please note when specifying the setting of a pressure switch:

In addition to the switching point it is also necessary to specify the direction of action (falling or rising).

Example for selection of a pressure switch:

A pump is to be turned on at 2.8 bar and off again at 4.2 bar.

Chosen type: DCMV6 according to data sheet DCM. Setting: Scale pointer to 2.8 bar (lower switching

point). Switching differential to 1.4 bar (set according to pressure gauge).

Cutoff point: 2.8 bar +1.4 bar = 4.2 bar.

Pressure switches

Mechanical pressure switches

Definitions

Mechanical pressure switches

General description

Operating mode

The pressure prevailing in the sensor housing (1) acts on the measuring bellows (2). Changes in

pressure lead to movements of the measuring bellows (2) which are transmitted via a thrust pin

(4) to the connecting bridge (5). The connecting bridge is frictionlessly mounted on hardened points

(6). When the pressure rises the connecting bridge (5) moves upwards and operates the microswitch

(7). A counter-force is provided by the spring (8), whose pre-tension can be modified by the adjusting

screw (9) (switching point adjustment). Turning the setting spindle (9) moves the running nut (10) and

modifies the pre-tension of the spring (8). The screw (11) is used to calibrate the microswitch in the

factory. The counter pressure spring (12) ensures stable switching behaviour, even at low setting values.

Pressure connection

Measuring bellows

Sensor housing

Thrust pin

Connecting bridge

Pivot points

Microswitch or other

switching elements

Setting spring

Setting spindle (switching

point adjustment)

Running nut (switching point

indicator)

Microswitch calibration

screw (factory calibration)

Counter pressure spring

Pressure sensors

Apart from a few exceptions in the low-pressure range, all pressure sensors have measuring bellows,

some made of copper alloy, but the majority of high-quality stainless steel. Measured on the basis of

permitted values, the measuring bellows are exposed to a minimal load and perform only a small lifting

movement. This results in a long service life with little switching point drift and high operating reliability.

Furthermore, the stroke of the bellows is limited by an internal stop so that the forces resulting from

the overpressure cannot be transmitted to the switching device. The parts of the sensor in contact with

the medium are welded together without filler metals. The sensors contain no seals. Copper bellows,

which are used only for low pressure ranges, are soldered to the sensor housing. The sensor housing

and all parts of the sensor in contact with the medium can also be made entirely from stainless steel

1.4571 (DNS series). Precise material data can be found in the individual data sheets.

Pressure connection

The pressure connection on all pressure switches is executed in accordance with DIN 16288 (pressure

gauge connection G 1/2A). If desired, the connection can also be made with a G 1/4 internal thread in

accordance with ISO 228 Part 1.

Maximum screw-in depth on the G 1/4 internal thread = 9 mm.

Centring pin

In the case of connection to the G 1/2 external thread with seal in the thread (i.e. without the usual

stationary seal on the pressure gauge connection), the accompanying centring pin is not needed.

Differential pressure switches have 2 pressure connections (max. and min.), each of which are to be

connected to a G 1/4 internal thread.

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