Troubleshooting
8.5.2 Test the input card
In the TEST/MAINT menu, every input current channel can be checked. If necessary, each input can be adjusted as well.
The input current can be checked by setting a defined current to the according channel and then comparing it with the displayed value. If necessary, the displayed value can be adjusted with an offset and a factor.
To set these parameters:
1.Set the SET OFFSET value to “0” and the SET FACTOR value to “1”.
2.Set the input current to a fairly small value (1 mA for example).
3.Adjust the SET OFFSET until the displayed current meets the set current.
4.Set the input current to a fairly big value (19 mA for example).
5.Adjust the SET FACTOR value until the displayed input current meets the set input current.
6.
7.Repeat the steps
TEST/MAINT CURRENT INPUTS mA INPUT INT/EXT
FUNCTION TEST
INPUT
| INPUT CURRENT | Displays the input current according to the current set to the corresponding channel. |
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| SET FACTOR | Default value: 1 |
| Adjusts the displayed input current with an factor. | |
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| SET OFFSET | Default value: 0 |
| Adjusts the displayed input current with an offset. | |
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| Default value: HOLD |
OUTPUT MODE | Decides how other members react if they try to read an input current value while the input | |
current card is in the function test. As the value of the input current in the function test is not | ||
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| based on any measurements other members reading this value probably have to be informed |
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| about this special situation. There are three settings: Hold, Active and Transfer. |
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| HOLD | Another reading member does not use the current read value but uses the last value before the |
| output current card was in the function test mode. | |
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| ACTIVE | Another reading member uses the current value even if the output current card is in the function |
| test mode. | |
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| TRANSFER | The reading member uses an own substitute value for its own output value. |
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