Troubleshooting - Omega RD2800 Series User Manual

21. MAINTENANCE
Troubleshooting methods are shown classified by symptoms. Read the item that corresponds to the symptom.
Caution
Repair and modifications
Never repair or modify the instrument by replacing assembled component units or parts, otherwise correct
repair or modifications cannot be executed and also electric shock or damage of your recorder may occur.
1
Not Working
Check
1) Check if power is supplied to the power
terminals.
2) Check if the power supply is as specified.
3) Check if the connections to the power
terminals are correct.
4) Try turning off or on the external power supply source.
5) Initialize the parameters and check if your recorder recovers to normal conditions. See Section 20.
(Caution) All parameters become the default values. Program them again.
2
Measured Value Abnormal
Symptoms
1) Measured values are unstable.
2) Check if the measured value is displayed
as shown below.
3) An error occurs.
4) Influences by ambient temperature
(Thermocouple input type only)

21.4 Troubleshooting

Turn on the external power supply source.
Supply the specified power (100 to 240V AC and 50/60 Hz).
Connect the cable to the power terminals (L, N) correctly.
• Check if the measuring terminals are loose.
• Check if the input signal is unstable.
• Check if the thermocouple is connected with another
instrument in parallel and the burnout function is programmed
to [Enable].
• Check if the input terminals are connected correctly.
• Check if the input terminals are loose.
• Check if the input signal wires are disconnected.

• Check if the input signal exceeds the measuring range.
• Check if the selection of ºC/ºF computation is correct.
• Check if the input signal is correct.
• Check if an extension wire is connected to the input terminal.
(Thermocouple input type only)
• Check the scale and adjust the measured values if any error
is detected. (See Section 18.1.)
• Check if the RJ selection is 0 (disable) in [Range/Printing
range] programming. (This is negligible if reference junction
compensation is executed externally.)
• Check if the terminal cover is mounted.
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Causes and remedial measures
Causes and remedial measures