Michell Instruments S904 Manuel utilisateur

S904 and S904D

Humidity & Temperature Calibrator

User’s Manual

Data Acquisition

Desiccant Charge

Humidity = Yellow

De-Humidify - Green

Heating = Yellow

Cooling = Green

Chamber Set

Humidity

Chamber Set

Temperature

%rh °C

Auto On On Auto

Man. Off Off Man.

S-904

Humidity Calibrator

Max.

Min.

495 206

97209 Issue 3.1

October 2016

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Use this information when contacting Michell Instruments for service purposes.

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This document is the property of Michell Instruments Ltd. and may not be copied or

otherwise reproduced, communicated in any way to third parties, nor stored in any Data

Processing System without the express written authorization of Michell Instruments Ltd.

S904

For Michell Instruments' contact information please go to

www.michell.com

S904 & S904D User’s Manual

iv 97209 Issue 3.1, October 2016

Contents

Safety ................................................................................................................................vi

Electrical Safety ...........................................................................................................vi

Toxic Materials .............................................................................................................vi

Repair and Maintenance ...............................................................................................vi

Calibration...................................................................................................................vi

Safety Conformity ........................................................................................................vi

Abbreviations.....................................................................................................................vii

Warnings .......................................................................................................................... viii

1 INTRODUCTION ................................................................................................1

1.1 Description ........................................................................................................ 1

1.1.1 Comparison of the S904 and S904D ............................................................... 2

1.2 System Components ........................................................................................... 3

1.2.1 S904 ............................................................................................................ 3

1.2.2 S904D.......................................................................................................... 5

2 INSTALLATION ..................................................................................................7

2.1 Installing the Relative Humidity and Temperature Control Probe............................. 7

2.2 Filling the Water Reservoir .................................................................................. 9

2.3 Draining the Water Reservoir............................................................................. 10

2.4 Desiccant ........................................................................................................ 11

2.5 Power Supply ................................................................................................... 12

3 OPERATION ....................................................................................................13

3.1 Preparation ...................................................................................................... 13

3.1.1 Installing Relative Humidity Instruments for Calibration ................................. 13

3.2 Start-Up........................................................................................................... 14

3.3 Manual Control of Humidity and Temperature Setting.......................................... 14

3.4 Typical Response Times for Various Step Changes............................................... 14

3.5 Maximum Humidity Levels That can be Generated by the S904 Series .................. 15

3.6 25 pin D-sub Connector - S904.......................................................................... 16

3.7 Automatic Control of Temperature and Humidity Set Points - S904 ....................... 17

3.7.1 25 pin D-sub Connector - Rear Panel and Inside Chamber - S904D................. 18

3.7.2 S904D Example Wiring Diagrams ................................................................. 19

4 APPLICATION SOFTWARE - S904D ...................................................................21

4.1 Connecting and Starting the S904D Software .................................................... 21

4.2 LabVIEW®Software Menu Structure .................................................................. 22

4.2.1 Command - File .......................................................................................... 22

4.2.2 Command - Settings.................................................................................... 23

4.2.3 Command - Tools........................................................................................ 24

4.2.4 Command – Help ........................................................................................ 30

4.3 LabVIEW®Software User Interface .................................................................... 31

5 MAINTENANCE................................................................................................40

5.1 Troubleshooting................................................................................................ 40

S904 & S904D User’s Manual

Michell Instruments v

Figures

Figure 1 S904 .........................................................................................................2

Figure 2 S904D .......................................................................................................2

Figure 3 S904 - Front View.......................................................................................3

Figure 4 S904 - Back Panel ......................................................................................4

Figure 5 S904D Front panel......................................................................................5

Figure 6 S904D - Back Panel ....................................................................................6

Figure 7 Control Probe Installation............................................................................7

Figure 8 Location of Control Probe Inside the Climate Chamber ..................................8

Figure 9 Filling the Water Reservoir ..........................................................................9

Figure 10 Emptying the Water Reservoir ...................................................................10

Figure 11 Desiccant Replacement.............................................................................11

Figure 12 Level of Silica Gel Required .......................................................................11

Figure 13 Probe Ports ..............................................................................................13

Figure 14 Port Adapter Removal Tool ........................................................................13

Figure 15 Port Adapters and Removal Tool ................................................................13

Figure 16 Humidity and Temperature Setting Switches ...............................................14

Figure 17 25 pin D-sub Connector Location ...............................................................16

Figure 18 25 pin D-sub Connector ............................................................................16

Figure 19 Switches ..................................................................................................17

Figure 20 25 pin D-sub Connector ............................................................................18

Figure 21 S904D Wiring Diagram Example 1 .............................................................19

Figure 22 S904D Wiring Diagram Example 2 .............................................................20

Tables

Table 1 Typical Response Times for Step Changes ................................................... 14

Appendices

Appendix A Technical Speciﬁcations.............................................................................. 42

Appendix B EU Declaration .......................................................................................... 44

Appendix C Quality, Recycling & Warranty Information................................................... 46

C.1 Pressure Equipment Directive (PED) 97/23/EC ............................... 46

C.2 Recycling Policy .......................................................................... 46

C.3 WEEE Compliance........................................................................ 46

C.4 RoHS2 Compliance ...................................................................... 47

C.5 Warranty..................................................................................... 47

C.6 REACH Compliance ...................................................................... 48

C.7 Return Policy ............................................................................... 48

C.8 Calibration Facilities ..................................................................... 49

C.9 Manufacturing Quality.................................................................. 49

C.10 FCC (EMC Requirements for North America) .................................. 49

Appendix D Return Document & Decontamination Declaration........................................ 51

S904 & S904D User’s Manual

vi 97209 Issue 3.1, October 2016

Safety

The manufacturer has designed this equipment to be safe when operated using the procedures

detailed in this manual. The user must not use this equipment for any other purpose than that

stated. Do not apply values greater than the maximum value stated.

This manual contains operating and safety instructions, which must be followed to ensure the safe

operation and to maintain the equipment in a safe condition. The safety instructions are either

warnings or cautions issued to protect the user and the equipment from injury or damage. Use

qualiﬁed personnel and good engineering practice for all procedures in this manual.

Electrical Safety

The instrument is designed to be completely safe when used with options and accessories supplied

by the manufacturer for use with the instrument.

Toxic Materials

The use of hazardous materials in the construction of this instrument has been minimized. During

normal operation it is not possible for the user to come into contact with any hazardous substance

which might be employed in the construction of the instrument. Care should, however, be exercised

during maintenance and the disposal of certain parts.

Repair and Maintenance

The instrument must be maintained either by the manufacturer or an accredited service agent. Refer

to www.michell.com for details of Michell Instruments’ worldwide ofﬁces contact information.

Calibration

The internal reference probe (HT961T00) should be re-calibrated annually. The probe should be

returned to the manufacturer, Michell Instruments, or one of their accredited service agents for re-

calibration.

Safety Conformity

This product meets the essential protection requirements of the relevant EU directives. Further

details of applied standards may be found in the product speciﬁcation.

S904 & S904D User’s Manual

Michell Instruments vii

Abbreviations

The following abbreviations are used in this manual:

°C degrees Celsius

°F degrees Fahrenheit

AC alternating current

DC direct current

max maximum

min minimum

% percentage

RH relative humidity

RS232 serial data transmission standard

T temperature

USB Universal Serial Bus

V Volts

mA milli Ampere

S904 & S904D User’s Manual

viii 97209 Issue 3.1, October 2016

Warnings

The following general warnings listed below are applicable to this instrument. They are

repeated in the text in the appropriate locations.

Where this hazard warning symbol appears in the following

sections it is used to indicate areas where potentially hazardous

operations need to be carried out.

DANGER

Electric

Shock Risk

Where this symbol appears in the following sections it is used to

indicate areas of potential risk of electric shock.

S904 & S904D User’s Manual

Michell Instruments 1

INTRODUCTION

1 INTRODUCTION

1.1 Description

The S904 Series are completely stand-alone and transportable calibrators for humidity

sensors, requiring no external services other than mains power. The calibrator is capable

of humidity generation over the range of 10-90% RH, with temperature control from

+10 to +50°C (+50 to +122°F). The calibration chamber features 5 interchangeable

ports to accommodate virtually any brand, type or model of sensor. This calibrator is

ideal for companies or organizations looking to calibrate large numbers of probes in a

laboratory or ﬁeld setting.

The environment within the insulated calibration chamber is temperature controlled

using a 4-zone fan assisted Peltier arrangement for maximum stability, and minimum

temperature gradient. The humidity of the circulating air is precisely regulated using

a closed-loop control system that functions by proportionally mixing ﬂows of dry and

saturated air.

Two highly visible LED panels display the current humidity and temperature within the

calibration chamber. The response time to a humidity or temperature step change is

typically less than 10 minutes, so a simple 3-point calibration can be carried out in

under an hour.

The S904 Series is easy to maintain. The desiccant changes color to indicate when it

needs to be recharged and this is visible through a clear window on the front of the

unit. Recharging the desiccant is simply a matter of heating it in a conventional oven

at +130°C (266°F) for 3 hours. The water reservoir at the front of the unit shows

the current saturator ﬁll level, and makes it easy to top-up with distilled water when

required. The only external service required is a single phase power supply.

There are two versions available:

• S904

• S904D

With the S904D version, the humidity and temperature set points of the chamber can

be controlled with the supplied PC application software, enabling the operator to create

completely automated calibration proﬁles for unattended laboratory operation. The

software also gives the ability to monitor, chart and log data from the probes connected

to the S904D or application software for later analysis. Alternatively, the set points can

be controlled manually with the front panel controls - making the S904 Series ideal for

ﬁeld calibrations where a PC is not available.

S904 & S904D User’s Manual

297209 Issue 3.1, October 2016

INTRODUCTION

1.1.1 Comparison of the S904 and S904D

The S904D has the Data Acquisition connector on the rear panel, and a blanking plate

ﬁtted to the front panel, as shown in

Figure 2.

The S904D also features a USB, and an RS232 port on the rear panel, for communication

with the LabVIEW®application software.

Front Panel

Data Acquisition

Figure 1

S904

Figure 2

S904D

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