The Model 322 Narrow and Wide Band Shunt Tester is a field-portable device, used primarily on-track, with an accuracy specification of +/- 3%, plus or minus one digit.

It is an excellent option for detecting:

• Major detuning caused by water leakage surge damage loose internal connections, etc.
• Low attenuation, caused by the above.
• Mislabelled shunts and couplers.
• Shunts that are affecting overlapped circuits.
• DC leakage, causing problems with DC track circuits.
• Identifying shunts/couplers that are OK [therefore speeding the process of elimination].
• Whether shunts/couplers and their related transmitters align properly.

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