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OM-CP-RF Series Operations Manual 

 

  

 

Omega Engineering, Inc. 

Revised 04/07/05 

Page 2 of 18 

Omega Engineering, Inc. 
Operations Manual for OM-CP-RF Series Data Loggers 

 

INTRODUCTION 

 

Omega’s OM-CP-RF series line of wireless-enabled data loggers provides a simple, low-

cost wireless solution for short-range data collection applications. These products are 

powered by a user-replaceable internal battery and can be configured for up to ten years of 
battery life. They are designed for one-way, low data-rate applications, and transmit real-

time data directly to a PC for monitoring. Like Omega’s standard series of data loggers, they 
are simple to use and their versatile configuration options allow for easy integration into a 

wide variety of applications. The product line includes models for all the most popular 
commercial and industrial measurements, as shown in this table: 
 

PRODUCT DESCRIPTION 
OM-CP-RFTemp101A 

Temperature Recorder and Wireless Transmitter 

OM-CP-RFRHTemp101A 

Humidity / Temperature Recorder and Wireless Transmitter 

OM-CP-RFTC4000A 

Thermocouple Temperature Recorder and Wireless Transmitter 

OM-CP-RFRTDTemp101A 

RTD Temperature Recorder and Wireless Transmitter 

OM-CP-RFpHTemp101A 

pH / Temperature Recorder and Wireless Transmitter 

OM-CP-RFVolt101A 

DC Voltage Recorder and Wireless Transmitter 

OM-CP-RFProcess101A 

DC Current Recorder and Wireless Transmitter 

OM-CP-RFPulse101A 

Pulse Recorder and Wireless Transmitter 

 
 

These products have onboard memory in addition to the wireless transmitter, so they 

can completely replace existing data loggers and strip chart recorders while providing an 

added wireless data link. This memory can also serve as a failsafe backup, in the event of 
interference in the wireless channel or interruption of service to the monitoring computer. 

 

TRANSMITTER CHARACTERISTICS 

 

The transmitter used in the OM-CP-RF series products is a carrier present-carrier absent 

(CPCA) amplitude-modulated (AM) signal operating at a carrier frequency of 418 MHz. The 

data being transmitted is encoded similarly to standard RS232 serial data at a bit rate of 
4,800 baud. This signal is detected by the RFC101A receiver module and converted to 
RS232 signals, which are passed to the COM port of the monitoring PC. 

 

  The transmitter type and encoding method permit the device to use the maximum 
allowable output power specified by the FCC, and also minimizes the amount of battery 
power required for the transmission. This gives the user the best possible range, and also 

ensures a long battery life. 

 
 

To conform to FCC Part 15.231 rules, the data transmission takes less than one second 

and the minimum periodic transmission rate allowed by the device is 30 seconds. The low 

duty cycle permits several devices to use the same communication band and receiver 
without excessive interference caused by “talking over” each other. 

 

Summary of Contents for OM-CP-RF Series

Page 1: ......

Page 2: ...78280 Guyancourt France TEL 33 0 1 61 37 2900 FAX 33 0 1 30 57 5427 Toll Free in France 0800 466 342 e mail sales omega fr Germany Austria Daimlerstrasse 26 D 75392 Deckenpfronn Germany TEL 49 0 7056...

Page 3: ...m 11 Complex RFExtender System 12 Module Address and Receiver Address Mask 12 Receiver Address Mask Example 13 BATTERY LIFE 14 BATTERY LIFE 15 OPERATING ENVIRONMENT 16 SYSTEM PERFORMANCE AND RELIABILI...

Page 4: ...s101A DC Current Recorder and Wireless Transmitter OM CP RFPulse101A Pulse Recorder and Wireless Transmitter These products have onboard memory in addition to the wireless transmitter so they can comp...

Page 5: ...ne of the OM CP RF series wireless enabled data loggers An RFC101A wireless receiver module and power supply for receiving wireless transmissions from the data logger An IFC110 interface cable for com...

Page 6: ...r WIRELESS CONFIGURATION DIALOG Figure 3 The Wireless Configuration dialog The Wireless Configuration dialog shown in Figure 3 allows the user to select from a variety of operating modes to meet the r...

Page 7: ...anual Transmitter Options The transmitter module has four configuration options Two of these options pertain to enabling and disabling the transmitter under different operating conditions and two pert...

Page 8: ...copies of the data packet increasing the likelihood that one of the copies will be received even when the other is lost due to interference Each packet always contains error detection to ensure that...

Page 9: ...ce This image is stored on the PC s hard disk so it is retained even when the software or PC is shut down The software then refers to the device image when receiving a transmission to fill in the info...

Page 10: ...ter mode or the real time chart recording feature of the software will avoid RF interference 3 Randomize the transmission interval This option is selected from the wireless configuration menu Selectin...

Page 11: ...ission attempt they cannot possibly collide during the second they are scheduled to select different sots for the second attempt For three or more transmitters it is possible to collide with one trans...

Page 12: ...37 347 349 353 359 367 373 379 383 389 397 401 409 419 421 431 433 439 443 449 457 461 463 467 479 487 491 499 503 509 521 523 541 547 557 563 569 571 577 587 593 599 601 607 613 617 619 631 641 643 6...

Page 13: ...ed Prime Numbers 29 23 19 17 13 179 173 167 163 157 Transmission Intervals More critical devices 290 seconds 230 seconds 190 seconds 170 seconds 130 seconds 1790 seconds 1730 seconds 1670 seconds 1630...

Page 14: ...ble instead of through the wireless transmitter and the RFExtender transmits the serial data back to the PC This setup has two advantages the logger can be launched downloaded and configured without b...

Page 15: ...ld be assigned node address zero and the remote nodes may be sequential starting with one Note that this is how the module addresses in Figure 6 were generated The receiver address mask instructs the...

Page 16: ...FF00 0100 Node FFFF 0102 FFFF 0101 Node FFFF 0103 Node FFFF 0108 Node Node FFFF 0107 FFFF 0106 Node FFFF 0104 Node FFFF 0105 Node RFEXTENDER TRANSCIEVER MASK ADDRESS RF SERIES DATA LOGGER IFC110 INTER...

Page 17: ...ctivity rate for cases where the logger and transmitter operate at different rates use the faster rate for estimation The calculations assume that the device is configured and deployed then downloaded...

Page 18: ...Transmitter location Keep the transmitter as close to the receiver as possible If either the transmitter or receiver must be in an enclosed area keep the other inside the same area This is especially...

Page 19: ...g Inc OM CP RFPulse101A RUYBOARDRF Omega Engineering Inc The following statement applies to all of the devices covered in this manual This device complies with Part 15 of the FCC Rules Operation is su...

Page 20: ...M CP RFRHTemp101A 4953A BOARDRF Omega Engineering Inc OM CP RFTC4000A 4953A BOARDRF Omega Engineering Inc OM CP RFRTDTemp101A 4953A BOARDRF Omega Engineering Inc OM CP RFpHTemp101A 4953A RFPHTEMP Omeg...

Page 21: ...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...

Page 22: ...ty Indicators Turbine Paddlewheel Systems Totalizers Batch Controllers pH CONDUCTIVITY pH Electrodes Testers Accessories Benchtop Laboratory Meters Controllers Calibrators Simulators Pumps Industrial...

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