Isolating Hardware Faults
7-22
TCPA300/400 Amplifiers and TCP300/400 Series Current Probes Instruction Manual
Table 7- 4:
Probe hardware faults
Symptom Possible Cause Repair Action
Probe Open LED stays continuously lit,
even with t he probe slider closed.
Open coil i n probe. Substitute probe with another probe or
the C alibrati on Adapter -- if the Probe
Open LED goes out , coil is open -- repair
bad connection or replace coil
Determining the Amplifier Firmware V ersion Number
If you are having a problem with your amplifier, it may be helpful to know the
version of firmware that is in the amplifier. The firmware version may help the
Technical Support Center to isolate the amplifier symptoms to a specific cause.
To determine the amplifier firmware version number, do the following:
1. Turn the amplifier power off.
2. Press and hold the COUPLING button.
3. Turn the amplifier power on.
After the power-on LED sequence, the LEDs on the far-left side of the front
panel show a binary representation of the firmware version number. The
firmware version number is the sum of the values for the lit LEDs. S ee
Figure 7--18 for the values each LED represent.
32
16
8
4
2
1
Hold down
during
power-on
Binary
value
Figure 7- 18: Displaying the amplifier firmware version number
For example, if the NONCOMPATIBLE PROBE TYPE LED is lit, the firmware
version number is 1.
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