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Ordering Configuration 

CMDP-D 

Duct mounted chilled mirror hygrometer (dew point only) 

CMDP-W 

Wall mounted chilled mirror hygrometer (dew point only) 

CMDPT-W  Wall mount chilled mirror hygrometer (dew point/air temperature) 

CMDP-P 

Pipe mounted chilled mirror hygrometer (dew point only) 

 

The CMDP overviews 

The CMDP series is a family of low-cost dew point chilled mirror transmitter that can be 

configured as a duct, wall, pipe, or an OEM unit. The unit offers stable, accurate and 

repeatable measurements that are traceable to NIST. Available air temperature option for wall 

and OEM configurations. Settable service cycles for balancing and cleaning the mirror.  The 

CMDP is a primary measurement using a fundamental principle to measure the dew point very 

accurately. Simple maintenance to cleaning the mirror requires using a wetted cotton swab to 

restore the transmitter to normal operation. Because of its construction, the customer can enjoy 

a long life of excellent performance. 

 

 

FEATURES 

 

1.

 

Precision accuracy. 

2.

 

Two 4-20mA outputs (configurable). 

3.

 

Durable and fast responding 

4.

 

Automatic balance function for the 

mirror, optical circuitry. 

4.

 

RS232 communication 

5.

 

Simple maintenance-mirror cleaning 

 

SPECIFICATIONS 

 

OPERATING  LIMITATIONS: 

Tempe

r

ature: 

-40°C to +70°C. High temperatures will damage the electronics. 

 

Accuracy: 

± 0.5C of reading for both dew point and temperature 

Repeatability: 

± 0.05C 

Calibration: 

NIST Traceable 

Measurement Range: 

Dew Point -20C (@ 25C) to 60C (non-condensing) 

Dew Point -40C (@)0C) 

Temperature probe: (optional) -40C to 120C 

Output: (

2) 4 to 20mA output at 24Vdc (configurable). Default settings: -20C to 60C (unless 

specified on purchase order. 

Supply Voltage: 

24Vdc +/-3V @1.0A 

Weight: 

2lbs 

Wetted material

: nickel, ultem and anodized aluminum 

Содержание CMDP Series

Страница 1: ...1 User s Guide Shop online at omega com e mail info omega com For latest product manuals omega com en us pdf manuals Series CMDP A chilled mirror hygrometer TM...

Страница 2: ...eering Inc Headquarters 800 Connecticut Ave Suite 5N01 Norwalk CT 06854 Toll Free 1 800 826 6342 USA Canada only Customer Service 1 800 622 2378 USA Canada only Engineering Service 1 800 872 9436 USA...

Страница 3: ...3 The information contained in this document is believed to be correct but OMEGA accepts no liability for any errors it contains and reserves the right to alter specifications without notice...

Страница 4: ...le maintenance to cleaning the mirror requires using a wetted cotton swab to restore the transmitter to normal operation Because of its construction the customer can enjoy a long life of excellent per...

Страница 5: ...60C The unit also has a RS232 communication connection that can be accessed using either the Hyper terminal or TeraTerm program which is available on most computers Notes Even though the unit is scale...

Страница 6: ...ng commands Calibrating Current Outputs There are 2 methods for calibrating the 4 20 mA outputs Method 1 uses a digital ammeter capable of 1 uA Resolution The second method uses high precision 005 Res...

Страница 7: ...one of these three states a The unit was just powered on and is going through its ARC cycle for 3 5minutes b The mirror is dirty has contaminants on it and it needs to be cleaned Refer to the clean m...

Страница 8: ...be removed Once removed twist the outer shell to the correct hole for airflow and then re install the set screw to hold the outer shell in place For example if the larger airflow hole has been select...

Страница 9: ...Female NPT Class 125 The sensor head black flow rate cap should be installed at least 1 into the process gas If the reading is oscillating you might need to adjust the black flow rate cap slowing the...

Страница 10: ...INTERPRET GEOMETRIC TOLERANCING PER DRAWN CHECKED ENG APPR MFG APPR Q A COMMENTS NAME DATE TITLE A CM 10 D THE INFORMATION CONTAINED IN THIS DRAWING IS THE SOLE PROPERTY OF INSERT COMPANY NAME HERE A...

Страница 11: ...ler and Greenspan establish the equivalence of dew point and the vapor pressure of water Using this equivalence and a second fundamental temperature measurement realizes the definition of Relative hum...

Страница 12: ...9...

Страница 13: ...therwise shall not exceed the purchase price of the component upon which liability is based In no event shall OMEGA be liable for consequential incidental or special damages CONDITIONS Equipment sold...

Страница 14: ...Paddlewheel Systems M U Totalizers Batch Controllers pH CONDUCTIVITY M U pH Electrodes Testers Accessories M U Benchtop Laboratory Meters M U Controllers Calibrators Simulators Pumps M U Industrial pH...

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