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The primary purpose of the LCD is to provide the installer/user with an indication that they are connected to and
measuring the desired signal(s). The uDL1 has a high resolution measurement system that records the measurements in
high resolution to the measurement storage memory. The LCD provides 3 ½ digits of measurement information.
When the analog cable is first attached, the uDL1 will enter a real-time measurement display mode for a period of 1
minute. During this time the uDL1 doesn't store information to memory and it provides real-time measurement data on
the LCD which is updated every 2 seconds. The "SAMPLE" icon continuously illuminates during this real-time display
mode. After the real-time mode expires, the "SAMPLE" icon will turn off and then flash during each measurement.
When a DC Voltage is being measured the LCD "DC" icon will illuminate. The LCD will not show any polarity mark
for positive signals. The "-" icon will illuminate for negative voltages. When an AC voltage is being measured, the
"AC" icon will be illuminated. When temperature is being measured the degree symbol will illuminate.
The battery symbol on the right of the LCD provides an approximate indication of remaining battery capacity. The
battery is at nearly full capacity when all three internal battery bars are illuminated. As the battery charge becomes
depleted, the number of bars displayed is reduced. When the battery is nearly depleted there will not be any remaining
bars and the LCD will display "Lo". Sampling operation will cease at that point. The "Lo" indication will remain even
after the analog cable is disconnected.
Figure 23 uDL1 Front Face
When more than one signal is being measured the LCD will cycle through each measured signal each time a sample
occurs. For example if DC Volts, AC Volts and Temperature were all enabled the display would cycle through each of
these measured values. While in the real-time display mode each measurement would be displayed for 2 seconds.
If an over-range condition is detected on the input signal, the uDL1 will display 'OVR' or '-O-' in the measurement
value area. 'OVR' is displayed when the magnitude of the measured signal multiplied by the configured scale factor
exceeds 1999. When 'OVR' is displayed for a measurement, the correct measurement value will still be stored correctly
in the measurement data as the measurement memory can hold values larger than 1999. '-O-' is displayed when the
input signal exceeds the hardware capabilities of the currently selected range. If '-O-' is displayed for a measurement,
the extracted measurement data will show 'OVER+' or 'OVER-' for the reading.
After the 1 minute elapses the real-time measurement display mode will stop and the device will automatically begin
data logging and measurement storage at the rate determined by the parameters. The LCD display value will update each
time a sample occurs. For example if a 10 second sample period was selected the display would update every 10 seconds.
When more than one signal is being measured the LCD will cycle through each measured signal each time a sample
occurs. So if all three measurement signals were enabled the LCD would display DC Volts for 10 seconds, then AC
Volts for 10 seconds, then temperature for 10 seconds and then return to DC Volts. The CSV data file will contain all
three measurements every 10 seconds.
During DC wave capture mode, the "SAMPLE" icon on the LCD display will blink at a rate of 10 times per second. In
that mode, 10 DC readings per second are written to the CSV file. Normal sampling is suspended during DC wave
capture mode.
To stop data logging simply unplug the measurement cable. The device will automatically shut off.
Each time the measurement cable is inserted the device will begin the 1 minute real-time measurement display mode
and then begin data logging. Each new measurement session is appended to the previous measurements in device
memory. In GPS equipped units that have a GPS signal lock, the GPS location is recorded in the CSV file at the start of
each new measurement session.
MOBILTEX® DATA LTD.
Calgary, Alberta
www.corTalk.com
TITLE: uDL1 Configuration and Operation Guide
DOCUMENT NO.:
SHEET:
UDL1-MAN-001
REV:
22 of 26
1.07
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