Testo 6621 Operating Manual

Instruction manual en

testo 6621 Air-conditioning transmitter for relative humidity and temperature P2A software for testo 6621

Contents 3

Contents

Contents......................................................................................................3

Safety and the environment..........................................................................4

Part 1: testo 6621

Specifications ..............................................................................................5

Product description....................................................................................10

Commissioning ..........................................................................................12

Assembling the instrument ..............................................................................................12

Wiring the instrument ......................................................................................................14

Parameterizing/adjusting/analyzing the instrument ..........................................................17

Maintaining the product ............................................................................17

Tips and assistance ..................................................................................18

Part 2: testo P2A Software

Specifications ............................................................................................19

First steps ..................................................................................................20

Installing the software / driver ..........................................................................................20

Starting the software ........................................................................................................20

Product description....................................................................................21

Using the product ......................................................................................22

Tips and assistance ..................................................................................26

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Safety and the environment4

Safety and the environment

About this document

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.

Pay particular attention to information emphasized by the following symbols:

· With the signal word Caution!:

Warns against hazards which could result in minor physical injury or damage to equipment if the precautionary measures indicated are not taken.

· Important.

Avoiding personal injury / damage to equipment

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

Only operate the product properly, for its intended purpose and within the parameters specified in the technical data. Do not use force.

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

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.

testo 6621 - Specifications 5

PART 1: TESTO 6621

Specifications

Functions and use

The testo 6621 is a transmitter for relative humidity and temperature. In the A01 (wall/voltage output) (see identification plate), the sensors are located in the housing; in the A02 (duct) version and the version A03 (wall/current output), the sensors are located in a permanently connected probe shaft. The transmitter is available with an integrated display for the reading as an option (cannot be retrofitted by the customer).

Applications include: Air conditioning, particularly in air conditioning in buildings and during storage. The product is not suitable for high-humidity drying processes (relative humidity constantly over 90 %).

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

The product must not be used in areas at risk of explosion!

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testo 6621 - Specifications6

Ordering overview

0555 6621 Axx / Bxx / Cxx / Fxx / Gxx / Mxx / Kxx

A01 Wall version (not with B01/B05) A02 Duct version A03 Wall version with external probe for 4...20mA analog output (only with B01)

B01 4 - 20 mA (2-wire, 24 V DC), two analog outputs (humidity/temperature) B02 0 - 1 V (4-wire, 24 V AC/DC), two analog outputs (humidity/temperature) B03 0 - 5 V (4-wire, 24 V AC/DC), two analog outputs (humidity/temperature) B04 0 - 10 V (4-wire, 24 V AC/DC), two analog outputs (humidity/temperature) B05 4 - 20 mA (2-wire, 24 VDC), humidity: analog output, temperature: passive, Ni1000 B06 0 - 1 V (4-wire, 24 VAC/DC), humidity: analog output, temperature: passive, Ni1000 B07 0 - 5 V (4-wire, 24 VAC/DC), humidity: analog output, temperature: passive, Ni1000 B08 0 - 10 V (4-wire, 24 VAC/DC), humidity: analog output, temperature: passive, Ni1000

C00 Without display C01 With display

E01 Housing colour light grey, with Testo-Logo (coloured) E02 Neutral housing, white (RAL9010), without Testo-Logo E03 Neutral housing, white (RAL9010), with Testo-Logo (black-white)

F01 Relative humidity (% RH) G02 Temperature (°C) (only with B01 to B04)

G03 Temperature (°F) (only with B01 to B04) M01 Sintered stainless steel filter (only for A02 and A03)

M02 Metal wire protection cap (only for A02 and A03) M03 Sintered PTFE filter (only for A02 and A03) M04 Open metal protection cap (only for A02 and A03) M05 Open plastic (ABS) cap (only for A02 and A03)

Sample orders

· Duct version with 0 - 10 V outputs, with display, neutral housing without Testo-logo, % RH, °C, open plastic capl: 0555 6621 / A02 / B04 / C01 / E02/ F01 / G02 / M05

· Wall version with 0...5 V outputs, without display, housing colour light grey, % RH, °F: 0555 6621 / A01 / B03/ C00 / E01/ F01 / G03 / K04

testo 6621 - Specifications 7

Technical data

Parameters

· Humidity: % RH, temperature: °C/°F

Sensor

· Humidity: Testo humidity sensor, temperature: NTC

· Temperature active signal output: NTC (B01...B04)

Temperature passive signal output: NI1000 (B05..B08)

Interfaces

· 1x mini-DIN for / PC

Measuring ranges

· Humidity: 0 - 100 % RH (> 90% RH only briefly)

· Temperature 6621-A01/A03: 0 - +60 °C/32 - 140 °F, Temperature 6621-A02: -20 - +70 °C/-4 - +158 °F

Measuring medium/pressure range:

· Non-contaminated air (filtered air in air-conditioning systems or air-conditioned rooms)

· Max. 1 bar positive pressure

Resolution

· Humidity: 0.1 % RH, temperature: 0.1 °C/0.1 °F

Accuracy

· Humidity*: ±2 % RH (0 - 90 % RH), ±4 % RH (> 90 - 100 % RH)

· Temperature active : ±0.5 °C/0.9 °F

· Temperature passive, Tolerance Ni1000 temperature sensor (B05 to B08) :

<0 °C: 0.4 °C + (0.028 x |t|) >0 °C: 0.4 °C + (0.007 x |t|)

Other measurement-related data

· Analog outputs (2 channels each) (Order code B01 to B04)

· Analog output 1 channel (Order code B05 to B08)

· Meas. cycle: 1/s

· Temperature coefficient (based on 25 °C):

0.05 % RH/K

· Response time t90: <15s at 2m/s In calibration/ adjustment, observe: The response time can be considerably higher in still air.

Ambient conditions

· Operating temperature: -20 - 70 °C/-4 - 158 °F (A02), with display from 0 - 50 °C/32 - 122 °F

· Application temperature: 0...60°C/ 32...140°F (A01/A03), with display 0...50°C / 32...122°F

· Storage temperature: -40 - 70 °C/-40 - 176 °F

Analog outputs

· 0 - 1 V ±2.5 mV (4-wire)/ 0 - 5V ±12.5 mV (4-wire)/ 0 - 10 V ±25 mV (4-wire)/ 4 - 20 mA ±0.05 mA (2-wire)

· Scaling range: -50…100°C/ -58…212°F,

-50…100%RH

Voltage supply

· 2-wire (4 - 20 mA): 24 V DC ±10 %

· 4-wire (0 - 1 V/0 - 5 V/0 - 10 V): 20 - 30 V AC/V DC

Housing

· Material: ABS

· Dimensions 6621-A01/A03: 81 x 81 x 26 mm, probe A03 see drawing Dimensions 6621-A02: 81 x 81 x 42 mm, see drawing for probe

· Weight 6621-A01: 80 g, Weight 6621-A02: 160 g Weight 6621-A03: 90g

· Protection class 6621-A01/6621-A03: IP30, Protection class 6621-A02: IP65 (with closed cable screw fitting and connection socket sealed with rubber plug, or with USB adapter attached)

· Cable couplings 6621-A02: 1 x M16 x 1.5

Display (optional)

· 2-line LCD

Directives, standards and tests

· EC Directive: 2014/30/EC

Guarantee

· Duration: 2 years, warranty conditions see webpage www.testo.com/warranty

* The determination of the measurement uncertainty

takes place according to GUM (Guide to the Expression of Uncertainty in Measurement). In the determination, the accuracy of the measuring instrument (hysteresis, linearity, reproduceability), the uncertainty contribution of the test site as well as the uncertainty of the adjustment site/works calibration are taken into account. For this purpose, k=2 of the extension factor, the usual value in measurement technology, is used as a basis, corresponding to a trust level of 95%.

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testo 6621 - Specifications8

Dimensions

testo 6621-A01 (wall):

testo 6601-A03 (wall/current version):

O 3

77,5

testo 6621 - Product description 9

testo 6621-A02 (duct):

A = length of sensor protection cap used

Sensor protection cap Order code Length A in mm

Sintered stainless steel filter M 01 33 Wire mesh filter M 02 40.3 Sintered PTFE filter M 03 35 Metal protection cap (open) M 04 35 Plastic protection cap (open) M 05 25

Choice of filter dependent on exposure to particles:

Velocity Exposure to particles

none fine coarse

< 7 m/s M04/05 M02 M03 > 7 m/s M 01 M02* M01*

* also use condensation protection 0554 0166, serves as flow protection

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