TELETECH TX 916, Руководство оператора

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pg. 12
The factory default tone can be restored by simultaneously pressing
and holding down the and keys on the PROBE for 1
second until a beep is heard, see Figure 5-1.
Figure 5-1. Reset Tone to Warble (Factory Default)
5.4. CONNECTED TO EXCHANGE
The PROBE has a red/green light located to the left of the key.
This will light up when the PROBE is connected to a cable pair that
has a battery connected to it that is > 15 V DC. The light colour
displayed indicates the polarity of the line: Green light indicates a
negative Exchange battery on the test lead’s Black clip. Red light
indicates a negative Exchange voltage on the test lead’s Red clip.
5.5. AUDIO BATTERY LEVEL INDICATOR
If the PROBE battery is almost flat, the PROBE will emit a long and
descending pitch screech whenever a key is pressed. This is easily
distinguishable from the normal higher pitch beep emitted when a
key is pressed when operating from a sufficiently charged battery.
The battery should be replaced to ensure correct operation.
6. LINE TESTS
6.1. PAIR IDENTIFICATION
Power on the OSCILLATOR by inserting the test lead into the 6-pin
socket.
For Pair Identification it is sufficient to connect the
OSCILLATOR’s blue leads to the line as follows:

Blue test lead with Red clip to Pair ‘a’ wire

Blue test lead with Black clip to Pair 'b' wire
Note: Reverse the clips if the OSCILLATOR beeps, indicating
incorrect polarity.