Document
UMA 139
Rev
2
Page
3 (7)
Jumper
Position
Function
Start
point
selection
jumper
0%
20%
Jumper top position provides 0Vdc or 0mA start point for Out(1), Out(2)
(0-20mA or 0-10V).
Jumper bottom position provides 2Vdc or 4mA start point for Out(1), Out(2) (4-
20mA or 2-10V).
NOTE!
The start point jumper is missing on some models!
Out(1)
Current
Voltage
Connection in position “Current” provides 0/4-20mA output range for Out(1).
Current output is not recommended for temperature measurements
Connection in position “Voltage” provides 0/2-10VDC output range for Out(1).
Please note! Temperature measurements accuracy is valid only for units
configured in voltage outputs mode.
Out(2)
Current
Voltage
Connection in position “Current” provides 0/4-20mA output range for Out(2).
Current output is not recommended for temperature measurements
Connection in position “Voltage” provides 0/2-10VDC output range for Out(2).
Please note! Temperature measurements accuracy is valid only for units
configured in voltage outputs mode.
Table II. Configuration jumpers for aSENSE
Self-diagnostics
The system contains complete self-diagnostic procedures. A full system test is
executed automatically every time the power is turned on. In addition, constantly
during operation, the sensor probes are checked against failure by checking the valid
dynamic measurement ranges. All EEPROM updates, initiated by the sensor itself,
as well as by external connections, are checked by subsequent memory read back
and data comparisons.
These different system checks return error bytes to the
system RAM. The error codes are available by connecting a PC with a special
RS232 cable connected to the UART port slide connector. The error codes are
shown in the software UIP (version 5 or later).
Warm up
and
Out of Range
are the
only bits that are reset automatically after return to normal state. All other error bits
have to be reset manually after return to normal by power off/on.
The yellow LED lights yellow at heating phase after power up
and if
an error has
been detected.
