Features | Description | Calculation Parameters | Specifications | Output Display | Control Parameters

ControLog©

Windows Based Automation and Control Software

For The Model 2500 Humidity Generator

FEATURES

• Fully automates operation of the Model 2500

• Automated profile run capability

• Integrated Report Editor for semi-custom reports

• Automatic retrieval of data for viewing or storage to disk

• Numeric or graphic real time or post process data viewing

• Variety of user selectable control modes

• User selectable units

DESCRIPTION

When connected to the Model 2500 via a PC serial port, ControLog fully automates the operation of the humidity generator. All data generated by the 2500 is automatically retrieved and stored for viewing in either numerical or graphical format in real time or post process. Data is stored to disk in a tab separated spreadsheet compatible format for later retrieval or further analysis.

ControLog can operate the system in a variety of control modes, including %RH, Frost Point, Dew Point, PPMv, and PPMw while also computing the corresponding values of Grains/lb, Absolute Humidity, Specific Humidity, Air Density, Enthalpy, Mixing Ratio, % Concentration, and Mole Fractions. Units of temperature, pressure, flow, etc. are also user selectable. In addition to this, the mathematical mean, standard deviation, and estimated uncertainty of all humidity values continually update in real time.

ControLog can maintain the 2500 at a single user entered setpoint, or it can be driven completely unattended from a Profile, a predetermined series of setpoint/time values. Profiles are easily created in the profile entry window. Any profile created may be executed immediately, or stored to disk for later access and use.

A Report Editor is also integrated which can create semi-custom reports containing generator and user supplied data for up to eight individual instruments. Data may be collected for as few or as many points as desired. Data collected, consisting of instantaneous values of generated humidity and temperature along with the humidity and temperature entered for instruments under test, are time stamped and stored to a set of temporary files. Also included with this data are calculated correction values, computed as the difference between the generated values and those entered for the test instruments. The Report Editor is then used to print this stored data with customized header and footer information.

CALCULATED HUMIDITY PARAMETERS

The Calculated Humidity Parameters window contains values of the currently generated humidity calculated from current system temperatures and pressures. An Error Estimate (explained in Control Parameters) is given for each value. A check mark in front of any item indicates that the item will be included in printed data when the printer is enabled.

GRAPHING

The Graph window is a powerful tool used to view previously generated data or to monitor the generated data in real time using the strip chart feature.

SPECIFICATIONS

ControLog® requires Microsoft Windows 95, 98, NT4.0, 2000 or XP.

OUTPUT DISPLAY

• %RH @Pc

• %RH @Pc Tc

• Frost (Dew) Point

• Dew Point

• PPMv

• PPMw

• Grains per Pound

• Absolute Humidity

• Dry Air Density

• Moist Dry Air Density

• Enthalpy

• Specific Humidity

• Mixing Ratio by Volume

• Mixing Ratio by Weight

• Percent by Volume

• Percent by Weight

• Vapor Mole Fraction

• Vapor Pressures

• Dry Air Mole Fraction

CONTROL PARAMETERS

Control Modes

• %RH @Pc

• %RH @PcTc

• Frost Point

• Dew Point

• PPMv

• PPMw

• Saturation Pressure

Control Adjustments

• Saturation Temperature

• Mass Flow Rate

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