3200B SERIES OPERATION MANUAL
TRANSMILLE LTD. Page 52
Calibrating LOOP Testers using the 3200B
Loop testing using the 3200B is performed using a fixed set of resistance ranges,
with auto (optional extra) and manual loop measurement.
Auto Loop Measurement
NOTE: Auto loop measurement is an option specified when a 3200B is ordered.
The auto loop measurement allows the 3200B to automatically measure the loop
resistance of the mains supply to the 3200B. THE RESISTANCE MEASURED IS
NOT THE RESISTANCE AT THE SOCKET INTO WHICH THE 3200 IS PLUGGED,
BUT THE RESISTANCE AT THE TEST ADAPTER SOCKET INTO WHICH THE
LOOP TESTER BEING CALIBRATED IS PLUGGED. This measurement
incorporates the resistance of the mains circuit to provide the value at the test
socket.
The 3200B will then incorporate this value into its displayed loop resistance values.
Manual Loop Entry
This standard function allows the user to enter a loop resistance measurement
manually by typing the figure in using the keyboard NOTE THIS MUST BE THE
VALUE OF THE LOOP RESISTANCE MEASURED AT THE TEST SOCKET. The
3200B will then incorporate this value into its displayed loop resistance values.
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