13-2
IM 2553A-01EN
13.2 Error Indication
The polarity or output setting display on the 2553A blinks or turns off if a setting is outside the
selectable range or if a setting inconsistent with other settings is specified. This section explains the
indications, possible causes, and their corrective actions.
Output
The polarity, output setting, and unit displays are blinking, and the output turns off (when the polarity is changed).
The output cannot be turned on.
Cause
The range, temperature type, or polarity change caused the output setting to go outside the
selectable range.
Examples:
• Changing the range to 30 V when the output setting is 1.20000 V in the 1 V range
• Changing the polarity to negative when the temperature type is K and the output setting is
1000.0°C
Correction
Operate an output setting dial. The output setting will change to the maximum setting in the
appropriate polarity of the range or temperature type or within the selectable range.
The output setting display shows a blinking “----.-,” and the polarity and unit displays are off.
Cause
The temperature type was set to TC USER or RTD USER when user-defined thermocouple or
RTD is not available.
For example, this will occur if the user definitions have been deleted with a communication
command.
Correction
Set the temperature type to a type other than TC USER or RTD USER, or create user
definitions.
The polarity, output setting, and unit displays and the indicator for the selected range or temperature type are
blinking. The output remains on, and the maximum value in the range is output.
Cause
The output exceeded the source range.
For example, this will occur when the source range of the user-defined output range is exceeded
as a result of applying reference junction compensation.
Correction
Change the output setting so that it is within the source range.
An error code is displayed in the 7-segment LEDs for displaying the output setting, and the polarity and unit
displays are off. Several error codes may be displayed alternately. The output turns off.
Cause
An overvoltage or overcurrent was detected, and the protection function tripped.
Correction
Eliminate the cause. Then, flip the OUTPUT switch down (OFF) to clear the warning display. Flip
the OUTPUT switch up (ON) to clear the warning display and turn the output on.