Vaisala DMP5 User manual

M212356EN-B

Quick Guide

Vaisala Indigo Compatible

Dew Point and Temperature Probes

DMP5, DMP6, DMP7, DMP8

PUBLISHED BY

Vaisala Oyj

Vanha Nurmijärventie 21, FI-01670 Vantaa, Finland

P.O. Box 26, FI-00421 Helsinki, Finland

+358 9 8949 1

Visit our Internet pages at www.vaisala.com.

No part of this document may be

reproduced, published or publicly

displayed in any form or by any means,

electronic or mechanical (including

photocopying), nor may its contents be

modiﬁed, translated, adapted, sold or

disclosed to a third party without prior

written permission of the copyright holder.

Translated documents and translated

portions of multilingual documents are

based on the original English versions. In

ambiguous cases, the English versions are

applicable, not the translations.

The contents of this document are subject

to change without prior notice.

Local rules and regulations may vary and

they shall take precedence over the

information contained in this document.

Vaisala makes no representations on this

document’s compliance with the local

rules and regulations applicable at any

given time, and hereby disclaims any and

all responsibilities related thereto.

This document does not create any legally

binding obligations for Vaisala towards

customers or end users. All legally binding

obligations and agreements are included

exclusively in the applicable supply

contract or the General Conditions of Sale

and General Conditions of Service of

Vaisala.

This product contains software developed

by Vaisala or third parties. Use of the

software is governed by license terms and

conditions included in the applicable

supply contract or, in the absence of

separate license terms and conditions, by

the General License Conditions of Vaisala

Group.

Table of contents

English.............................................................................................................................................5

日本語...............................................................................................................31

4 M212356EN-B

Table of contents

Product Overview..............................................................................................6

Probe Structure............................................................................................................................ 6

Basic Features and Options......................................................................................................6

Output Parameters......................................................................................................................7

Installation...........................................................................................................8

DMP5 Probe........................................................................................................ 9

Installing with Mounting Flange 210696............................................................................. 10

DMP6 Probe........................................................................................................11

Installing Probe Head with Cooling Set DMP246CS.........................................................13

Cooling Set Installation Example........................................................................................... 15

DMP7 Probe.......................................................................................................16

DMP8 Probe.......................................................................................................18

Tightening the Clasp Nut........................................................................................................ 20

Attaching Ball Valve Kit to Process....................................................................................... 21

Wiring.................................................................................................................23

Attaching Probe to Indigo 200 Series Transmitter.................................24

Vaisala Insight Software.................................................................................25

Connecting to Insight Software.............................................................................................25

Modbus.............................................................................................................. 26

Default Communication Settings..........................................................................................26

Measurement Data Registers.................................................................................................26

Diagnostic Data Registers.......................................................................................................27

Conﬁguration Registers...........................................................................................................28

Test Value Registers..................................................................................................................28

Technical Support............................................................................................29

More Information.......................................................................................................................29

Warranty...................................................................................................................................... 29

Recycling..................................................................................................................................... 29

ENGLISH

Product Overview

DMP series probes are dew point and temperature measurement probes with a digital output

(Modbus protocol). The probes are designed for demanding dew point measurement

applications. The probes have a two-part structure, with measurement electronics contained in

the probe body and sensor(s) in the probe head. The probe body and the probe head are

connected by a cable. Length options for this connecting cable depend on the probe model.

The probes are compatible with Vaisala Indigo transmitters. They can also be connected to

Vaisala Insight software for conﬁguration, calibration, diagnostics, and temporary online

monitoring.

Probe Structure

Figure 1 Probe Parts

1Protection cap (remove before use)

25-pin M12 connector

3Probe body with type label

4Status indicator:

Green Power on and probe online,

ﬂashes when communicating

Red Error

O Power o or indicator

disabled

5Probe cable (do not cut)

6Probe head (DMP7 model shown)

7Location of sensors on the probe head.

DMP series probes have a removable

ﬁlter over the sensors that can be

replaced if it gets dirty or damaged.

8Protection cap (remove before use)

Basic Features and Options

• Comprehensive list of output parameters. For example: relative humidity, temperature,

dew point temperature, wet-bulb temperature, absolute humidity, mixing ratio, water

vapor pressure, enthalpy. See Output Parameters (page 7).

• Sensor purge provides superior chemical resistance

• Sensor warming function minimizes condensation on sensor

• Traceable calibration certiﬁcate

• Standalone Modbus RTU over RS-485

• Compatible with Indigo series of transmitters

• Can be connected to Vaisala Insight PC software for conﬁguration, calibration,

diagnostics, and temporary online monitoring

6 M212356EN-B

Output Parameters

Values of all available output parameters are always locked (showing the latest

valid value) when chemical purge, autocalibration, or extra heat functions are

active.

Output parameter is available

Output parameter is unavailable during sensor warming unless temperature is written to

Output parameter is not available on this model

Table 1 Availability of Output Parameters

Output Parameter Output Unit DMP5 DMP6 DMP7 DMP8

Relative humidity %RH

Temperature °C

Dew point temperature °C

Dew/frost point temperature °C

Dew/frost point temperature at

1 atm

°C

Dew point temperature at 1 atm °C

Absolute humidity g/m3

Mixing ratio g/kg

Water concentration ppmv

Water vapor pressure hPa

Water vapor saturation

pressure

hPa

Enthalpy kJ/kg

Dew point temperature

dierence

°C

Absolute humidity at NTP g/m3

Water mass fraction ppmw

ENGLISH

Installation

When you choose the installation location for the probe, consider the following:

• Verify the operating environment speciﬁcation of the probe model. The probe head

typically has a much wider operating temperature range than the probe body.

• If the temperature of the measured environment diers greatly from ambient

temperature, the entire probe head and preferably plenty of cable must be inside the

measured environment. This prevents measurement inaccuracy caused by heat

conduction along the cable.

• Probe mounting options are model-speciﬁc.

Figure 2 Example Installation

1Mount the probe head horizontally to prevent any water condensing on the probe head

from running to the sensors.

2Let the cable hang loosely to prevent condensed water from running along the cable to

the probe body or probe head.

3Attach the probe body to a wall or other surface using the two mounting clips (Vaisala

item 243257SP) supplied with the probe. Each clip attaches to the installation surface with

one screw (screw hole Ø 4.2 mm).

4Cable to Modbus master or Indigo transmitter.

The supplied mounting clips are not designed to withstand strong

vibration. Use other methods to secure the probe body if necessary. For

example, attach the probe body using a cable tie.

CAUTION!

8 M212356EN-B

DMP5 Probe

[in]

136 [5.35]

Ø 25

[0.98]

M12/5

41 [1.61]

242 [9.53]

192 [7.56]

Ø 12

[0.47]

Ø 13.5

[0.53]

Ø 5

[0.2]

Probe cable

2 m [6.56 ft] or 10 m [32.8 ft]

Figure 3 DMP5 Dimensions

Vaisala DRYCAPâDew Point and Temperature Probe DMP5 is designed for humidity

measurement in applications with high temperatures. The long and robust steel probe and an

optional installation ﬂange allow easy installation with adjustable depth through insulation, for

example, in ovens.

DMP5 is built for direct measurement in hot and dry processes, up to +180 °C (+356 °F). As the

probe can be directly placed in the process, there is no need for a sampling system or trace

heating. As a result, high measurement accuracy and constancy are maintained. DMP5

provides unmatched dry-end measurement accuracy at temperatures up to 140 °C; however, it

can operate safely at temperatures up to 180 °C.

• Operating temperature of probe body −40 … +80 °C (−40 … +176 °F)

• Operating temperature of probe head −40 ... +180 °C (−40 ... +356 °F)

ENGLISH

Installing with Mounting Flange 210696

Mounting ﬂange 210696 is designed for attaching Ø13.5 mm probe heads through the wall of a

process chamber or duct. The ﬂange kit includes a ﬂange, a sealing ring, and screws.

75 [2.95]

50 [1.97]

Drilling 16 ... 22

[0.63 ... 0.87]

105 ... 200 [4.1 ... 7.87]

[in]

1Wall of chamber or duct

2Flange

3Sealing ring

4Self-tapping screws (B 4.2×16 DIN 7981)

5Probe

When the temperature dierence between the process or duct and the

surroundings is large, insert the probe head as deep in the process or duct as

possible. This prevents errors caused by heat conduction along the probe cable.

10 M212356EN-B

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