Testo 6721 Operating Manual

Instruction manual en

testo 6721 Dew point monitor

P2A software for testo 6721

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Contents

Contents 3
Safety and the environment 4

Part 1: testo 6721

Specifications 5
Commissioning 8

Assembling the instrument 8
Wiring the instrument 9
Connecting the instrument 11
Parameterizing/adjusting/analyzing the instrument 11

Maintaining the product 11
Tips and assistance 12

Part 2: testo P2A Software

Specifications 13
First steps 14

Installing the software/driver 14
Starting the software 14

Product description 15
Using the product 16
Tips and assistance 19

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Contents 3

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4 Safety and the environment

Safety and the environment

About this document

i Please read this documentation through carefully and familiarize yourself with

the product before putting it to use. Keep this documentation to hand so
that you can refer to it when necessary. Hand this documentation on to any
subsequent users of the product.

i Pay particular attention to information emphasized by the following symbols:

· Important.

Avoiding personal injury/damage to equipment

i Never store the product together with solvents and do not use any

desiccants.

i Only operate the product properly, for its intended purpose and within the

parameters specified in the technical data. Do not use force.

i Only carry out the maintenance and repair work that is described in the

documentation. Follow the prescribed steps when doing so. Use only OEM
spare parts from Testo.

Protecting the environment

i Send the product back to Testo at the end of its useful life. We will ensure

that it is disposed of in an environmentally friendly manner.

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testo 6721 - Specifications

PART 1: TESTO 6721

Specifications

Functions and use

The 6721 is a dew point monitor for monitoring trace humidity in the following
applications:

· Trace humidity monitoring in compressed air systems, e.g. upstream of pneumatic
machines.

· Monitoring (compressed air) low-temperature driers.

· Monitoring (compressed air) membrane driers.

The product must only be assembled, wired and connected by qualified
personnel.

The product must

not

be used in areas at risk of explosion!

Ordering overview

0555 6721 Axx / Fxx / Kxx

A01 G½" process connection
A02 NPT ½" process connection

F01 Dew point °Ctd / GW 1 / GW 2 / hysteresis
F02 Dew point °Ftd / GW 1 / GW 2 / hysteresis

K01 German/English instruction manual
K02 French/English instruction manual
K03 Spanish/English instruction manual
K04 Italian/English instruction manual
K05 Dutch/English instruction manual
K06 Japanese/English instruction manual
K07 Chinese/English instruction manual

6 testo 6721 - Specifications

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Technical details

Parameters, measuring range

· Dew point temperature (trace humidity):

-30 - 30 °Ctd/-22 - 86 °Ftd

Accuracy

· Dew point temperature at 25 °C/77 °F process
temperature:
±4 K (-30…-20°Ctd/-22…-4°Ftd),
±3 K (-20…-10°Ctd/-4…14°Ftd),
±2 K (-10…0°Ctd/14…32°Ftd),
±1 K (>0°Ctd/>32°Ftd)

Resolution

· 0.1 °Ctd/0.1 °Ftd

Meas. cycle

· 1/s

Other instrument data

· Humidity sensor: Testo humidity sensor (with special
trace humidity adjustment)

· Temperature sensor: NTC

· Output variable: Dew point (°Ctd or °Ftd) via two
switching outputs

· Measuring medium: Compressed air (filtered and
dried, ISO 8573 classes 2-4-2)

· Operating temperature: 0 - 50 °C/32 -122 °F, ideally
between 10 °C and 35 °C/50 °F

· Pressure range: max. 20 bar (abs)

· Connection: G½" (0555 6721-A01) or NPT½"
(0555 6721-A02)

· Supply: 24 V AC/V DC (20 - 30 V AC/V DC permissible)

· Power consumption: 50 mA

· Interfaces: mini-DIN interface for
parameterizing/adjusting/analyzing using testo
P2A Software

· Switching outputs: 2 x floating, switching voltage
24 V DC/V AC, switching current 0.5 A, optional wiring
as NC or NO contact

· Limit values (2x) and switching hysteresis (1x):
Free choice within the measuring range by means of
order code, or setting via testo P2A Software

· Sensor protection: Sintered stainless steel filter,
12 mm diameter

· Housing material: plastic PAA GF30

· Housing dimensions: 167 x 33 x 33 mm

· Protection class: IP65 (with adapter connected or with
protective tab on closed interface.)

· Ambient temperature: 0 - 50 °C/32 - 122 °F

· Storage temperature: -40 - 70 °C/-40 - 158 °F

· Weight: 240 g

Directives, standards and tests

· EC Directive: 2004/108/EEC

Warranty

· Duration: 2 years

· Warranty conditions: see website
www.testo.com/warranty

Dimensions:

21ø

33

167

 0555 6721-A01: G½

0555 6721-A02: NPT½"

 Installation depth in process
 Wrench size