Rotronic MBW 973 User Manual Page 1

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 0

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

Getting Started 7 Selecting Graph vs. Numeric Data Any data line may be viewed either as numeric or as a graph. The Numeric/Graphic menu is used

8 Getting Started Selecting Units The data may be viewed in any of the many available units. There are two Units menus used to change the units of d

Getting Started 9 The Measuring Head Assembly The heart of the 973 Dew Point Mirror instrument is the measuring head assembly. It is designed

10 Getting Started The Balance Indicator Although it is directly obtained from the intensity of the mirror’s reflected light signal, the Balance Indi

Getting Started 11 The input and output connectors are clearly labeled on the Sample Gas section of the back panel. Depending on the specific

12 System Configuration System Configuration You may configure many aspects of the 973 based on your preferences at the time. For instance, you may

System Configuration 13 Display Parameters Use the Parameters menu to select which parameters to display on the data lines. When you select para

14 System Configuration Scaling Each graph can have its own scaling (or y-axis) values. There are three distinctly different scaling modes to choo

System Configuration 15 5. Once the value is shown is what you want press the Ok button (or the enter key) to accept the new value, or press the

Warranty MBW Calibration Ltd. (MBW) warrants the products it manufactures or distributes to be free of defects in material and workmanship under nor

16 System Configuration However, for mirror temperatures between 0 and approximately –30°C, the state of the condensed layer is generally indetermina

System Configuration 17 Mirror Check Control Mirror Check is the process of warming the mirror to evaporate all condensation, look for the presen

18 System Configuration Changing Units You can display system data in any of a wide variety of units. When you make a new units selection, that sele

System Configuration 19 Specific Humidity Units Specific humidity may be displayed in units of g/g, g/kg, and lb/lb. When changing these units,

20 System Configuration Analog Outputs If this option is installed, the 973 is equipped with at least two analog outputs that are independently confi

System Configuration 21 Scaling the Output to the Data With the appropriate configuration window displayed, you may change the data scaling of th

22 Back Panel Connections Back Panel Connections Power Plug The power requirements are identified on the serial number label on the back of the instr

Back Panel Connections 23 Analog Outputs Analog outputs, if this option is installed, are used for connection of external voltmeters or chart rec

24 Measurement Tips Measurement Tips Since each particular 973 model is best suited for a specific dew/frost point range, it is important to have som

Measurement Tips 25 Hose Input and Output Preferred Connections When comparing two or more instruments, make the connections in parallel. PrPum

i Table of Contents Table of Contents ...

26 Measurement Tips Cooling Requirements Air Cooling All 973 systems are equipped with air cooling. When air cooled, the fan speed is controlled aut

Facility Requirements 27 Installation Facility Requirements Environmental Your 973 is a precise laboratory quality instrument. While it does not

Introduction 29 Remote Communication Introduction The 973 is equipped with a bidirectional RS-232 communications interface that allows it to be con

30 Communications Settings Communications Settings To communicate with the 973, set your computer to the following settings. Baud Rate: 9600 Data B

Command Syntax 31 Even if the command is not a request for data, but rather is a command to change a setpoint or parameter, the 973 still respond

32 Command Reference Parameter Units via RS-232 Temperature °C Pressure Pa Flow l/m RH % Absolute Humidity g/m3 Specific Humidity g/kg Volume Rat

Command Reference 33 Commands Listed By Functional Group Measurement Data Syntax Function DP? Dew Point, °C FP? Frost Point, °C RH? Relative Humi

34 Command Reference ORIS Settings Syntax Function UseOris.on[=i][?] 1 enables ORIS, 0 disables ORIS UseOris.below[=n][?] Temperature below which ORI

Command Reference 35 Analog Outputs (continued) Syntax Function Ana2.param[=i][?] Parameter to track with analog output #2 Ana2.paramMin[=n][?] M

ii REMOTE COMMUNICATION ...29 Introduction...

36 Command Reference Head Temperature Calibration Coefficients Syntax Function HeadTempCal.a0[=n][?] Polynomial 0th order (Zero) coefficient, ~ 0 Hea

Mirror Cleaning 37 Maintenance Mirror Cleaning The heart of the 973 dew point measuring instrument is the measuring head assembly. It is designe

38 Exterior Cleaning Although a clean mirror is important to accurate measurements and sound measurement practices, please take the following comment

Welcome 1 Welcome Congratulations! With the 973 Dew Point Mirror you will be able to perform precision dew point and frost point measurements as

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

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 f

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 of