GE ApexPro TT Technical Manual page 75

Adjust T14 transmitter frequency
2001989-351A
i. Verify that the difference is no more than ±750Hz.
ii. If the transmitter fails this test, it must be returned for service.
iii. Remove the jumper from the interface connector port. When the jumper
is removed, the transmitter resets and returns to normal operation mode.
b. For T14 transmitters:
i. If the difference is less than or equal to ±130 Hz, no adjustment is
required as the transmitter is within specifications. If the difference is
greater, proceed to
NOTE
If the difference is more that ±1400 Hz from the target frequency,
take the transmitter out of service and contact GE.
WARNING
The T14 transmitter cannot be adjusted more that 1400 Hz over the
lifetime of adjustments. Refer to the previously recorded
adjustments to ensure that the overall total of adjustments is not or
will not be more than 1400 Hz. If it greater than or equal to 1400 Hz
take the T14 transmitter out of service and contact GE.
NOTE
This procedure applies to the T14 transmitters. If the ApexPro or ApexPro CH
transmitter frequency needs to be adjusted, send the unit to GE for service.
1. Remove the jumper from the serial port on the transmitter. From the
programming box kit, connect the programming box to the transmitter and the
laptop serial port.
2. Launch HyperTerminal.
3. Configure HyperTerminal to the following settings.
4. Configure the ASCII setup.
a. Select File > Properties.
b. In the Settings tab, click ASCII Setup...
c. Verify the settings are the same as shown:
ApexPro™
Adjust T14 transmitter
Baud-Rate 9600
Data Bits 8
Parity None
Stop Bit 1
Flow Control None
Maintenance
frequency.
4-13