Instruction manual

CI-ControlWaveLP Service / 3-1
Section 3
SERVICE
3.1 SERVICE INTRODUCTION
This section provides general, diagnostic and test information for the ControlWaveLP
Process Application Controller.
The service procedures described herein will require the following equipment:
1. PC with null modem interface cable (see Figure 2-5A)
2. Loop-back plug, 9-pin female D-Sub (for RS-232) (see Figure 3-12)
3. Loop-back plug, 9-pin female D-Sub (for RS-485) (see Figure 3-12)
The following test equipment can be used to test the Power Supply/Sequencer Board:
1. DMM (Digital Multimeter): 5-1/2 digit resolution
2. Variable DC Supply: Variable to 30Vdc @ 2.5A (with vernier adjustment)
When ControlWaveLP RTUs are serviced on site, it is recommended that any associated
processes be closed down or placed under manual control. This precaution will prevent any
processes from accidentally running out of control when tests are conducted.
Warning
Harmful electrical potentials may still be present at the field wiring terminals
even though the ControlWaveLP’s power source may be turned off or discon-
nected. Do not attempt to unplug termination connectors or perform any
wiring operations until all the associated supply sources are turned off and/or
disconnected.
Warning
Never attempt to install or remove any printed circuit boards from a
ControlWaveLP while it is powered and running. Doing so can cause sudden
electrical transients or imbalances that are capable of causing damage to the
unit, as well as other associated circuit boards. Always turn off the Main
power, including any additional supply sources used for externally powered
I/O circuits, before changing any modules.
3.1.1 Accessing PC Boards For Testing
Testing and replacement of PC boards should only be performed by technically-qualified
persons having advanced mechanical and electrical skills and possess the service equip-
ment described in the text. It is important that the reader studies the disassembly and test
procedures described in this manual before starting. Any damage to the Control-WaveLP
resulting from improper handling or incorrect service procedures will not be covered under
the product warranty agreement. If these procedures cannot be performed properly, the
unit should be returned to Bristol Babcock (with prior authorization from Bristol Babcock)
for factory evaluation and repairs.