15-1
IM 2560A-01EN
3
2
1
4
5
6
7
8
9
10
11
12
13
14
15
16
App
Index
Troubleshooting, Maintenance, and Inspection
15.1 Troubleshooting
Faults and Corrective Actions
• If an error code appears on the output display, see section 15.3.
• If servicing is necessary, or if the instrument does not operate properly even after you have
attempted to deal with the problem according to the instructions in this section, contact your nearest
YOKOGAWA dealer.
Problems and Solutions
Reference
Nothing appears on the display when the power is turned on.
Securely connect the power cord to the 2560A and to the power outlet.
3.3
Set the supply voltage and frequency to within the permitted range.
3.3
The output does not turn on.
Confirm that the load is within the specified range.
2.2
In the case of resistance sourcing, confirm that the excitation current is within the
specified range.
2.2
Confirm that the ambient temperature and humidity are within their specified
ranges.
3.2
Check the wiring system.
3.6
Set the main setting within the selectable range. If the setting goes outside the
source range when the polarity is changed or if the range or type is changed, the
output turns off.
5.4, 6.4
Turn the power off and then on again.
3.4
Dials and switches do not work.
Check the REMOTE indicator. If the REMOTE indicator is on, flip the OUTPUT
switch down to turn off the indicator.
1.1
n dial, m dial, deviation dial, PRESET switch, SWEEP switch, and SCALE switch does not operate.
If set to high resolution mode, set to normal resolution mode.
8.1
The source value is strange (common).
Use the 2560A in a stable environment within the ambient temperature and
humidity ranges indicated in the specifications.
3.2
Use the 2560A in an environment free of noise.
3.2
After turning the power on, warm-up the 2560A for at least 30 minutes.
3.4
Check whether the load is an inductive or capacitive load that is within the
allowable range.
16.1
The voltage or current source value is strange.
Confirm that the load is within the specified range.
2.2
While sourcing, keep the output terminal temperature from changing.
Be especially careful when using the 100 μA or 100 mV range.
3.2, 3.5, 3.6
The source value of thermocouple’s thermoelectromotive force is strange.
Confirm that the load is within the specified range.
2.3
While sourcing, keep the output terminal temperature from changing.
3.2, 3.5, 3.6
Confirm that the reference junction compensation mode is set correctly.
2.3, 6.6
If the RJ sensor 257875 is connected directly to the input terminals of the
measuring instrument to be calibrated and the temperature of the terminals is
different from the ambient temperature, the temperature imbalance will cause
the temperature of the terminals to change. This may prevent accurate reference
junction compensation. In such a situation, use a relay terminal block that is at
the same temperature as the ambient temperature. However, you will need a
thermocouple or compensating lead wire.
Appendix 3
The resistance source value or the RTD’s resistance source value is strange.
Confirm that a correct wiring system, three-wire or four-wire, is being used for the
measurement instrument to be calibrated.
Appendix 4
Confirm that the excitation current is within the specified range.
2.2
When the output divider and deviation is being set, the output value is strange.
Check that main setting (MIN) is not set to an inappropriate value.
5.3, 6.3
Unable to write the user definition file.
Set the USB communication feature to mass storage (STOR).
6.5
Unable to configure or control the instrument through the communication interface.
Check to make sure that the GP-IB address setting matches the specifications.
9.3
Check to make sure that the TCP/IP settings match the specifications.
10.3
Check that the USB feature is set to remote control.
11.3
Confirm that the interface meets the electrical and mechanical specifications.
9.1, 10.1, 11.1
Chapter 15 Troubleshooting, Maintenance, and Inspection
