Omega OM-CP-RF Series User Manual

Contents

Omega OM-CP-RF Series User Manual Manual pdf 9 page image

OM-CP-RF Series Operations ManualOmega Engineering, Inc. Revised 04/07/05 Page 7 of 183. Staggering transmissions from multiple devices ñ If several devices need torecord data at the same time while transmitting the output in real time, this optioncan be used to ensure that at least one transmission from each device is sentwithout interference from the other devices. This is similar to the randomizationoption provided above, but is better suited to some applications. See ìUsing MultipleDevicesî later in this manual.Indicator ModeThe device may be configured to blink the LED activity indicator every 10 seconds (thefactory default setting) or only when a scheduled reading is taken. The green LED indicatorwill blink to indicate that the device is configured properly to allow a wireless transmissionto occur. If the wireless transmitter is disabled by any of the available configuration options(by setting the transmitter output mode to disable the wireless output, or by selecting eitherof the related transmitter control options), the indicator will not blink. When a wirelesstransmission is about to be sent, both the green and the red LED indicators will blink.The primary reason to turn off the 10-second indicator is to conserve battery capacity.See ìBattery Lifeî later in this manual. The 10-second mode is forced ìonî if the customtransmit interval discussed above is enabled.REGISTERING THE DEVICE ON A SYSTEMBefore the Omega software will receive data from an OM-CP-RF-series transmitter, thedevice must be properly registered on the system. When the device is identified orconfigured, the PC software will store an image of the device for future reference. Thisimage is stored on the PCís hard disk so it is retained even when the software or PC is shutdown. The software then refers to the device image when receiving a transmission to ìfill inîthe information that is not transmitted in the data packet. This information includes thedevice ID, calibration data, and measurement variables such as a thermocouple type orengineering units. The data packet contains a checksum of critical settings to ensure invaliddata is not displayed. For this reason, the device must be re-registered if it is calibrated orthe measurement data is changed on another PC.STARTING THE DEVICE AND SYNCHRONIZING THE TRANSMITTERLike other Omega data loggers, the OM-CP-RF series devices must be configuredthrough a PC. The wireless transmitter is primarily set up through the ìWirelessConfigurationî dialog discussed previously, but synchronization of the transmitter to thedesired starting time is accomplished through the ìStart Deviceî dialog when launching thedata logger. When launching, choose the start time, and set the logger parameters (deviceID and reading rate) for the run. When the device is started, both the logger andtransmitter time base will be set for the selected start time. They will remain inactive untilthe selected time, and then begin to operate as configured in the ìStart Deviceî andìWireless Configurationî dialogs. When the delay-start time arrives, the logger will takereadings (if enabled) at the programmed reading rate, and wireless transmissions (ifenabled) will be made at the reading rate or custom interval, depending on how the deviceis configured.If a delayed start is specified, the device will remain completely inactive during the startdelay period. The indicators will not blink, no readings will be taken and no transmissionswill be sent. It will continue to communicate normally, and may be queried, stopped, or