Related Manuals for Omega CMDP Series
Summary of Contents for Omega CMDP Series
- Page 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...
- Page 2 Servicing North America: U.S.A. Omega Engineering, 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 & Canada only) Tel: (203) 359-1660 Fax: (203) 359-7700 e-mail: info@omega.com...
- Page 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.
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Page 4: Specifications
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. - Page 5 (-20C). So, lowering the temperature of the sensor will get you to lower measurable dew points. Wiring instructions for the CMDP series Terminal Block All wiring is done to the 12-pin terminal block located on the PCB...
- Page 6 Pin 3 (+) 4-20mA output Pin 4 Ground Pin 5 (+) 4-20mA output Pin 6 (-) common for 4-20mA outputs Pin 7 (-) Air temperature probe Pin 8 (-) Air temperature probe Pin 9 (+) Air temperature probe Pin 10 (+) Air temperature probe Pin 11 Return Pin 12 24Vdc (@1A) PCB blue connector:...
- Page 7 Operations There are two ways to determine if the sensor is operating/properly functioning. Reminder: When the unit is first powered on, the unit will take 3-5 minutes to control. Typically, the unit goes through what we call an ARC condition. Which is a balancing cycle, the unit initial heats up, then goes into an acquiring mode (hunting for the dew point) and then the control mode.
- Page 8 Airflow adjustments There are air 6 holes in the middle of the outer shell. 2 large holes, 2 medium, and 2 small. The holes allow the airflow to the mirror (where the measurement is made). Airflow holes Set screw Outer shell To adjust the airflow to the mirror, the Phillip set screw must be removed.
- Page 9 For Pipe Mount configurations Roscid supplies a Hex Bushing: Red Brass, 1 1/2 in x 1 in Fitting Pipe Size, Male NPT x Female NPT, Class 125. Black flow rate cap 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 flow rate down.
- Page 10 174.5 50.55 R 22.35 91.95 69.85 136.4 147.32 R. 9.14 R 11.18 44.45 UNLESS OTHERWISE SPECIFIED: NAME DATE DRAWN DIMENSIONS ARE IN mm TOLERANCES: FRACTIONAL TITLE: CHECKED ANGULAR: MACH BEND CM-10-D TWO PLACE DECIMAL ENG APPR. THREE PLACE DECIMAL MFG APPR. Q.A.
- Page 11 Chilled mirror hygrometers (CMH) use a primary fundamental principal measurement which is a change in resistance. This principle works when a sample of process gas flows across a special polished coated mirror. The mirror temperature is lowered by thermal electric coolers (located beneath the mirror block/mirror) until the water vapor of gas condenses out on to the mirror in the form of either dew or frost.
- Page 13 Department will issue an Authorized Return (AR) number immediately upon phone or written request. Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser, including but not limited to mishandling, improper interfacing, operation outside of design limits, improper repair, or unauthorized modification.
- Page 14 Where Do I Find Everything I Need for Process Measurement and Control? OMEGA…Of Course! Shop online at omega.com TEMPERATURE M U Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies M U Wire: Thermocouple, RTD & Thermistor M U Calibrators & Ice Point References M U Recorders, Controllers &...