Rotronic MBW 373 Manuel d'utilisateur

Dew Point Mirror 373 OPERATION AND MAINTENANCE MANUAL MBW Calibration Ltd. Seminarstrasse 57 CH-5430 Wettingen / Switzerl

6 Selecting Parameters to Display Selecting which parameters to display on the five data lines is easy. It is done with the Parameter menu. 1. U

7 this is not required and nothing is wrong with leaving the Units menu (or any other menu) on the screen. The Measuring Head Assembly The heart of

8 Measuring the Room Ambient Dew Point Temperature Lets use the 373 to measure the dew point temperature of the room by enabling the portion of the

9 Gas Inlet Connection While the previous example did not rely on any external gas connections, the 373 is equipped with fittings for connection of

10 Swagelok® Tube Fittings Swagelok® brand tube fittings are generally used to connect the gas inlet and outlet tubes to the 373S, H, and HX systems

11 When using an Original-style Gasket, place it into the female nut whenever possible. No special positioning is needed because the gasket is self

12 System Configuration You may configure many aspects of the 373 based on your preferences at the time. For instance, you may easily select which

13 Display Parameters Use the Parameters menu to select which parameters to display on the data lines. When you select parameters for display on an

14 The time span is changed with the Numeric/Graphic menu. 1. Use the lower right menu key to select the Numeric/Graphic menu. ‘Numeric/Graphic’ a

15 4. Using the numeric keypad, enter the value needed. If the number shown in the Value column is already correct, no entry is needed here. If y

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

16 Now enable or disable the Force Frost function by pressing the Force Frost Below button. A green indicator light on the button means that the fu

17 Heating Time The Heating Time determines how long to hold at the mirror check temperature before allowing another dew or frost point measurement.

18 2. All systems, including L and LX models, are equipped with controls for the head heater even if not equipped with external tube heater control

19 Temperature Units Temperature values may be displayed in units of °C, °F, or K. When changing temperature units, all temperature values, whether

20 Changing Color You are free to change the foreground and/or background color of any data line with the Fore Color and Back Color menus. Access t

21 Analog Outputs The 373 is equipped with at least two analog outputs that are independently configurable. For each of the analog outputs, you may

22 Scaling the Output to the Data With the appropriate configuration window displayed, you may change the data scaling of the analog output vs. the

23 Back Panel Connections Power Plug The power requirements are identified on the serial number label on the back of the instrument. Depending on t

24 Mirror Temperature The mirror of the 373 is equipped with two independent temperature sensors. One is used for system measurement and control.

25 Gas Input and Output The gas input and output fittings are used for connection of the 373 to the sample gas. Based on the original configuration

i Table of Contents Table of Contents ...

26 Measurement Tips Since each particular 373 model is best suited for a specific dew/frost point range, it is important to have some minimal knowle

27 Connecting Hoses Your success with dew or frost point measurement may likely depend on proper selection and connection of the hoses you use in co

28 Hose Input and Output Preferred Connections When comparing two or more instruments, make the connections in parallel. PrPumpFlowPrPumpFlow Tr

29 Cooling Requirements Air Cooling Mid and high range systems are equipped with air cooling. When air cooled, the fan speed is controlled automati

30 External Hose Heat The 373H and 373HX systems are equipped with controls for externally connected heated hoses. These external heated hoses allo

31 Installation Facility Requirements Environmental Your 373 is a precise laboratory quality instrument. While it does not require any special envi

32 Rack Mounting Rack mounting kits are available for all 373 models. For 373LX models, simply remove the unit from it’s current rack mount housing

33 Remote Communication Introduction The 373 is equipped with a bidirectional RS-232 communications interface that allows it to be connected to a re

34 Command Syntax This section details the general syntax guidelines regarding termination, leading and trailing spaces, case sensitivity, and numer

35 Leading and Trailing Spaces The 373 ignores leading and trailing spaces. It also ignores spaces before and after equal signs and question marks.

ii Preparation for Use ... 31 Bench

36 Command Reference The available commands listed here are grouped by function. If a command is considered as a read only value, then it is shown

37 Commands Listed By Functional Group Measurement Data Syntax Function DP? Dew Point, °C FP? Frost Point, °C RH? Relative Humidity, % RHw? Relative

38 Mirror Cleaning Preparation Syntax Function MinHeadRemovalTemp[=n][?] Head and inner cooler are warmed above this temp when Mirror Cleaning butto

39 Precooler Control Syntax Function PreCoolerPID.on[=i][?] 1ÆPrecooler On, 0ÆOff PreCoolerPID.setPt? Current Precooler temp setpoint, °C PreCoolerP

40 Mirror Temperature Calibration Coefficients Syntax Function MirrorTempCal.r0[=n][?] Callendar VanDusen R0 coefficient, ~ 100.00 MirrorTempCal.a[=

41 Internal Tube Temperature Calibration Coefficients (if so equipped) Syntax Function IntTubeTempCal.a0[=n][?] Polynomial 0th order (Zero) coeffici

42 Relative Pressure Sensor Calibration Coefficients (if so equipped) Syntax Function RelPressCal.a0[=n][?] Polynomial 0th order (Zero) coefficient

43 Maintenance Mirror Cleaning The heart of the 373 dew point measuring instrument is the measuring head assembly. It is designed to be highly sens

44 Inspecting / Cleaning the Mirror The mirror requires occasional periodic cleaning to maintain high accuracy measurements. The flush mounted mirr

45 Drawings

1 Welcome Congratulations! With the 373 Dew Point Mirror you will be able to perform precision dew point and frost point measurements as well as me

3 Operation Getting Started This section allows you to set up and start using the 373 right away. You’ll turn the system on and quickly familiarize

4 Data Lines The first five lines of the display are for numeric or graphic representation of the measured data. We refer to those first five lines

5 The Touch Screen The 373 utilizes a touch screen for user interaction. To activate a menu option or toggle a function on or off, simply touch the