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Maintenance

2001989-351A ApexPro™ 4-13

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 Adjust T14 transmitter frequency.

NOTE

If the difference is more that ±1400 Hz from the target frequency,

take the transmitter out of service and contact GE.

Adjust T14 transmitter frequency

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:

Baud-Rate 9600

Data Bits 8

Parity None

Stop Bit 1

Flow Control None

GE ApexPro Technical Manual

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