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When the memory of the device is full the uDL1 will display "FUL" on its LCD, mark the measurement memory with
a full indication and stop taking measurements. The 1,000,000 measurement memory will provide about 114 days of
measurements at a 10 second sample rate for a single channel.
The device has an internal rechargeable Li-Ion cell that is automatically recharged when the unit is connected to the
computer USB port. The battery can be fully recharged in about 4 hours. The battery icon flashes while the unit is being
charged and becomes steady state on once the battery is fully charged. The uDL1 has an internal charge controller so
there is no problem in leaving the device connected to a USB port for extended periods of time. The fully charged battery
will provide at least 1,000,000 measurements or six months on a charge.
The useful battery lifetime is targeted to be 5-7 years at which time it can be factory replaced. The water resistant and
compact design of the uDL1 makes field battery replacement impractical. In order to maintain the high accuracy it is
suggested the device be factory calibrated at least every 5 years.
The last calibration date can be viewed by utilizing the 'Detailed Status' function in the uDL1 configuration application.
The unit should be recalibrated as required to maintain accuracy for the measurement application. Re-calibration
intervals are suggested to be nominally every 2 years and as a maximum every 5 years. However, as customer accuracy
requirements will vary, the individual customer may determine optimal re-calibration intervals based on accuracy aging
specifications found in Appendix A.
5.1 Advanced G1 Model Operation for Interruption Surveys
The uDL1 advanced model may be used for monitoring interruption surveys if the sampling interval is set to 1s. In
addition, the "1s DC Sampling Delay" parameter should be set to a value that will allow for settling of the signal
originating from the measurement point. Typically, a value of 250ms would ensure settling of the waveform.
When configured in this manner, the uDL1 will ensure that measurements are always taken at the configured delay from
the transition of the second. Since the time on the advanced model is locked to the GPS system clock, all measurements
will be synchronized to the interruption device waveform if the interruption device is also GPS synchronized. The
interruption waveform being monitored must have a cycle time that is a whole number of seconds.
Note that when this mode is used, the battery life on the uDL1 will vary depending on the value of the sampling delay
parameter. With the sampling delay parameter set to 600ms, only 2 days of operation can be expected from a fully
charged battery. Reducing the sampling delay parameter to 250ms will result in approximately 4.5 days of operation on
a full charge.
5.2 Advanced G2 Model Operation for Interruption Surveys
The uDL1 G2 advanced model is based on more sophisticated processor that is able to directly track interruption cycles.
Sampling with 1s intervals, as was needed with G1 hardware, is no longer necessary. Also, the G1 limitation on the
interruption cycle on/off times being only whole seconds does not apply to the flexible G2 interruption tracking mode.
The parameters associated with interruption waveform can be directly programmed into the unit and it will then take on
and off measurements at the proper point in the waveform.
Battery life in this mode will be less than the normal sampling mode. Battery life will be dependent on the configured
interruption wave form parameters. Two weeks of operation will be possible even with worst case timing parameters.
MOBILTEX® DATA LTD.
Calgary, Alberta
www.corTalk.com
TITLE: uDL1 Configuration and Operation Guide
DOCUMENT NO.:
SHEET:
UDL1-MAN-001
REV:
23 of 26
1.07
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