3M 2250E, 2273E manual About Trace Modes

Page 12

About Trace Modes

Peak: In this mode, as the antenna crosses the cable, the Receiver speaker volume increases to a maximum and the bar graph fills from both sides toward the middle. As the antenna moves off the cable path, the speaker volume decreases and the bar graph opens.

Peak with High-Expanded:While in Peak mode, press to select High-Expanded (the highest setting). Speaker response is cut off as the antenna moves away from the cable.

Null: In this mode, the signal is a minimum directly over the cable and is maximum on either side of the cable. The speaker volume and display signal strength correspond to the signal being received. In the normal bar graph display mode (Null flag flashing) the bar graph opens at low signal strength and closes at high signal strength. In the inverse Null bar graph display mode (Null flag is on solid), the bar graph closes at low signal strength and opens at high signal strength.

Differential: In this mode, the Receiver provides an indication of the relative position of the cable to the Receiver by displaying right or left arrows (the arrow points toward the cable). The bar graph increases to a maximum as the Receiver antenna is moved directly over the cable path. Speaker response is a high warbling tone to the right of the cable path, a low warbling tone to the left, and a solid tone directly over the cable.

Special Peak Mode: This mode will increase the signal sensitivity of the Receiver when the signal is too weak for normal tracing. Use special attention when using this mode because it is more susceptible to congestion than the normal peak mode.

Numerical Signal Strength Display Resolution: The user may select between 3 levels of signal strength resolution. The setting will be displayed on the right end of the bar graph during selection.To change the setting,

press and hold the key during power up then press the key.

Display resolution may be changed between the standard 1X, (no bars illuminated), 2X, (One bar illuminated), and 4X (Two bars illuminated). The unit saves the last setting until changed.

Note: While tracing cables, keep the Receiver handle in line with the suspected cable path.

Page 11

Image 12
Contents Dynatel 2250E/2273E Advanced Cable Fault Locator Table of Contents Installing or Replacing the Batteries IntroductionInitial Receiver Configuration Receiver Battery TestTransmitter Battery Test Using External DC Power and 5 Watt OutputWatt Output Transmitter Setup Locating a Buried CableDirect Connect Method Cable Receiver Setup Now go to Locating a Buried Cable Receiver Setup DYNA-COUPLER MethodInduction Method Receiver Setup About Trace Modes Selecting Passive Power Frequencies Selecting Auxiliary FrequenciesUsing Current Indications During Locating Determining Cable Depth and CurrentLocating Sheath Faults 2273E only Cable path Red leg Locating AN Active Duct Probe ADP Determining ADP DepthLocating Markers using the Receiver Locating EMS MarkersLocating Markers while Tracing Cable Path Toning Aerial Faults Cable or Pair Identification Cable IdentificationPair Identification Optional Accessories Technical Information TransmitterReceiver EnvironmentalTelecom Systems Division Important Notice