MBW 973 Bedienungsanleitung

Dew Point Mirror 973

MBW Calibration Ltd.

Seminarstrasse 57

CH-5430 Wettingen / Switzerland

+41 56 426 21 33 phone

+41 56 427 14 00 fax

0Hwww.mbw.ch

[email protected]

Operation and

Maintenance Manual

Phone: +44 (0)1943 878877

Email: [email protected]

Web: www.ima.co.uk

UK Distribution by IMA Ltd:

Parkwell House,

Otley Road,

Guiseley, West Yorkshire,

LS20 8BH, England

Warranty

MBW Calibration Ltd. (MBW) warrants the products it manufactures or distributes to be free of

defects in material and workmanship under normal use and service when operated within the

specified design limitations for a period of 12 months from date of initial shipment. Under this

Warranty, MBW will, at its discretion, repair or replace any component that upon examination

by MBW or its duly authorized representatives proves to be defective during the warranty

period provided the system is returned to the factory for inspection and repair shipping

prepaid. Improper or unauthorized maintenance, storage, repair, or alteration of any kind by

personnel other than MBW or its duly authorized representatives may void all warranties.

Warranty may also be voided for misuse, neglect, accident, corrosion, and improper

installation. This Warranty is exclusive and in lieu of any and all other warranties of

merchantability, fitness for a particular purpose, or any other warranty, expressed or implied,

and all other liabilities and obligations on the part of MBW. MBW will not be liable for any

other claims or damages, either direct, indirect, or consequential arising out of the use of its

products.

Table of Contents

Table of Contents ..................................................................................................................... i

Welcome................................................................................................................................... 1

How to Use This Manual ......................................................................................................... 1

For More Information ............................................................................................................. 1

OPERATION.........................................................................................................3

Getting Started......................................................................................................................... 3

Turning the 973 On and Off................................................................................................... 3

What You See........................................................................................................................ 3

The Touch Screen.................................................................................................................. 5

The Measuring Head Assembly............................................................................................. 9

Dew Point Measurement........................................................................................................ 9

System Configuration ........................................................................................................... 12

Menu Options....................................................................................................................... 12

Display Parameters..............................................................................................................13

Graphing Data...................................................................................................................... 13

Control Setup....................................................................................................................... 15

Changing Units..................................................................................................................... 18

Changing Color.................................................................................................................... 19

Analog Outputs .................................................................................................................... 20

Back Panel Connections....................................................................................................... 22

Power Plug........................................................................................................................... 22

Power Switch ....................................................................................................................... 22

RS-232................................................................................................................................. 22

External Temperature.......................................................................................................... 22

Analog Outputs .................................................................................................................... 23

Gas Input and Output........................................................................................................... 23

Barometric Pressure Input................................................................................................... 23

Measurement Tips................................................................................................................. 24

Understand the Measuring Range....................................................................................... 24

Connecting Hoses................................................................................................................24

Cooling Requirements ......................................................................................................... 26

INSTALLATION..................................................................................................27

Facility Requirements ...........................................................................................................27

Environmental...................................................................................................................... 27

Power................................................................................................................................... 27

Preparation for Use ............................................................................................................... 27

Benchtop Use....................................................................................................................... 27

Preparation for Shipping or Transportation ....................................................................... 27

REMOTE COMMUNICATION ............................................................................29

Introduction............................................................................................................................ 29

Hardware Connection & Cabling.......................................................................................... 29

Communications Settings .................................................................................................... 30

Command Syntax ..................................................................................................................30

General Usage..................................................................................................................... 30

Termination Characters ....................................................................................................... 30

Leading and Trailing Spaces ............................................................................................... 31

Case Sensitivity.................................................................................................................... 31

Numeric Values.................................................................................................................... 31

Command Reference............................................................................................................. 32

Commands Listed By Functional Group.............................................................................. 33

MAINTENANCE .................................................................................................37

Mirror Cleaning...................................................................................................................... 37

Exterior Cleaning................................................................................................................... 38

Front Panel........................................................................................................................... 38

Rear Fan Grills..................................................................................................................... 38

Welcome 1

Welcome

Congratulations! With the 973 Dew Point Mirror you will be able to perform precision dew

point and frost point measurements as well as measurements of other parameters such as

relative humidity. The 973 utilizes a full color active matrix liquid crystal display with an

integral touch panel. It has a high contrast ratio and a wide viewing angle for easy readability.

Data is displayed in large easy to read fonts. Using the on screen buttons and menus, you

can easily configure each line of the display for a variety of humidity, temperature, and

pressure parameters that may be viewed in either SI or non-SI units.

How to Use This Manual

If you have the time and inclination, you can read this manual from front to back. Since we

realize your time is valuable and that you may not wish to do that yet, we recommend the

following approach to familiarize yourself with the 973 and start using it right away.

1. With the 973 at hand, go straight to the Getting Started section on page 3. From there,

you can quickly learn to use the 973 to make a dew point measurement.

2. Next, read the System Configuration section beginning on page 12 to learn how to

configure the system to meet your preferences.

3. Finally, read the Back Panel Connections section beginning on page 22. That section

identifies all the electrical and gas connections available on the back panel and explains

how and when to use them.

For More Information

For a more thorough understanding of the 973 and other humidity measurement information,

please read the remaining sections of this manual.

The Installation section covers bench space, environmental, and power requirements.

The Remote Communication section discusses the RS-232 interface both from a hardware

and software perspective. It gives details relating to cabling to connect the 973 to a

computer, and gives the syntax and examples of each of the commands that the 973

recognizes.

The Maintenance section covers topics such as Mirror Cleaning and general maintenance

required to keep your 973 performance at its best.

If the information you seek is not in one of the manual’s included sections, never hesitate to

front page of this manual.

Getting Started 3

Operation

Getting Started

This section allows you to set up and start using the 973 right away. You’ll turn the system on

and quickly familiarize yourself with the layout and features of the display and touch screen.

Next, you’ll learn about the optical mirror assembly for later care and cleaning that may be

required. Finally, you’ll use the 973 to measure the dew point temperature. Set your 973 on the

bench and let’s get started!

Turning the 973 On and Off

The 973 needs a source of normal AC power. Have a look at the label on the back panel of the

instrument for the voltage required. Ensure that the required voltage matches that of your

standard laboratory power receptacles.

1. Using the supplied AC power cord, supply the

proper voltage to the instrument by plugging the

cord into the back of the instrument, then into an

AC receptacle of the proper voltage.

2. The power switch is located on the back panel

next to the power cord input. Turn it ON.

The display should become visible within a few

seconds. If nothing seems to happen, check the

power source. There may also be some fuses

located next to the power switch. You can remove

and replace them with known good ones. Suspect

fuses can be tested for continuity with an ohmmeter.

What You See

When power is applied to the 973, the display will activate within a few seconds. A typical

display configuration is depicted below. If you or someone else previously configured your

system, it may look slightly different. But don’t worry, we’ll show you how to set it up the way

you like.

Data

Lines

Fixed

Function

Keys

10.00

25.41

-8.41

14.695

Relative Humidity

External Temp

°C

Frost Point

°C

Atm Pressure

psia

Pump Dew/Frost

Control

Mirror

Check Mirror

Cleaning

4 Getting Started

Data Lines

The first four lines of the display are for numeric or graphic representation of the measured data.

We refer to those first four lines as data lines.

10.00

Relative Humidity

If numeric, a data line contains the value to the

left, with the parameter description and units to

the right.

-9.65

Time Span 20.16.30

-10.2

Time Span 00:30:00

-9.8

If graphic, a data line shows a simple graph of

the data over time.

The choice of which parameter is shown on which data line, as well as whether a data line is

viewed as numeric or graphic, is easily selectable. You’ll see how to make these selections

shortly.

Status Bar

Flow Rate 60

STABLE

Balance

Indicator

Frost

Density Hi

Mirror

Residue Hi

The status bar contains balance, density,

contamination, and flow rate indicators. The

configuration of the status line is fixed and

never changes.

Fixed Function Keys

Pump Dew/Frost

Control

Mirror

Check Mirror

Cleaning

The bottom line of the display contains a row of

fixed function keys. You’ll use these keys to

start and stop the pump, enable and disable

measurement of dew point, and other things.

The function of each of these keys never

changes, and they are always available for

use.

Menu Keys

To the right side of the display is a column of

menu keys. Each of these keys changes

function as needed.

Notice that the bottom key in this column is

different from the rest. The bottom key is used

to cycle the upper keys through the various

menu options. The text on the bottom key

changes to indicate the currently selected

menu option. The text of the upper keys

change based on the functions available in the

menu.

Use this key to change menus

Getting Started 5

The Touch Screen

The 973 utilizes a touch screen for user interaction. To activate a menu option or toggle a

function on or off, simply touch the screen directly over the key or object desired.

Calibrate the Touch Screen

Before using the 973 for the first time, you may need to calibrate the touch screen to your finger

positioning preference. Here’s how –

1. Press and hold the enter key on the numeric

keypad for 3 or 4 seconds. If you’ve done it

correctly, you’ll hear two loud short beeps.

If not, release the key and try again.

2. With the tip of your finger, press the center

of the yellow key in the upper right corner of

the touch screen. It is labeled ‘Touch This

Key’. Once you touch it, the yellow color

goes away and another key turns yellow.

3. Now, touch the yellow key that’s in the lower

left corner of the touch screen. Once you

touch it, the yellow color goes away and you

have successfully calibrated the touch

screen.

4. Test your new touch screen calibration by pressing each of the six blank menu keys on the

right side of the touch screen several times. If they seem not to work well, just repeat the

calibration steps again from the beginning.

You may recalibrate the touch screen as often as needed, however, it is rarely required.

6 Getting Started

Navigating the Menus

The various menus of the right column of keys are navigated by using the key in the lower right

corner of the touch screen. Each time you press the lower right key, a new menu appears on

the keys directly above it. The menu is circular, meaning that once you go past the last menu,

the first one appears again and the process starts over. You can use the +/- key on the keypad

to move backward through the menus. Use the enter key to clear the menu.

Selecting Parameters to Display

Selecting which parameters to display on the data lines is easy. It is done with the Parameter

menu.

1. Use the lower right menu key to select the

Parameter menu. ‘Parameter’ appears on

the key, and the keys above get left pointing

arrows. Notice that each key corresponds

to the data line it points toward.

2. Press the arrow key corresponding to the

data line you wish to change. Notice that

each time you press the arrow key, the

parameter of the data line changes. The

parameter selection is circular, meaning that

once you reach beyond the last available

parameter the first one is again displayed

and the cycle starts over.

3. Change the parameters on any of the other

data lines with the same method.

4. If you like, you may clear the menu keys

when finished by cycling through all the

menus using the lower right key on the

touch screen, or by pressing the enter key

once. Note that this is not required and

nothing is wrong with leaving the Parameter

menu (or any other menu) on the screen.

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