12.14
SEL-734 Meter Instruction Manual Date Code 20090730
Testing and Troubleshooting
Meter Troubleshooting
Meter Troubleshooting
Inspection Procedure
Complete the following procedure before disturbing the meter. After you
finish the inspection, proceed to the Troubleshooting Procedure.
Step 1. Measure and record the power supply voltage at the power
input terminals.
Step 2. Check to see that the power is on. Do not turn the meter off.
Step 3. Measure and record the voltage at all control inputs.
Step 4. Measure and record the state of all outputs.
Troubleshooting Procedure
All Front-Panel LEDs Dark
1. Input power not present or T3.15AH250V fuse is blown
(see Power Supply Fuse Replacement on page 2.7).
2. Self-test failure.
3. Meter is in SEL
BOOT.
Cannot See Characters on Meter LCD Screen
1. Meter is de-energized. Check to see if the HALARM contact is
closed.
2. LCD contrast is out of adjustment. Use the steps below to
adjust the contrast.
a. Press the ESC pushbutton for 5 seconds.
b. The meter should turn on LCD contrast display bar.
c. Use the LEFT ARROW and RIGHT ARROW pushbuttons to
adjust the contrast.
d. Press the ESC pushbutton twice to return to normal
operation.
Meter Does Not Respond to Commands From Device Connected to
Serial Port
1. Communications device not connected to meter.
2. Meter or communications device at incorrect baud rate or other
communication parameter incompatibility, including cabling
error.
3. Meter serial port has received an XOFF, halting
communications. Type <Ctrl+Q> to send meter an XON and
restart communications.
METER Command Does Not Respond as Expected
1. Group Settings CTR, CTRN, or PTR not set correctly.
2. Meter analog inputs not connected correctly.
Courtesy of NationalSwitchgear.com
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