Emerson ROSEMOUNT 5081-A Instruction Manual page 104

MODEL 5081-A
15.2 TROUBLESHOOTING WHEN A FAULT, WARNING, OR ERROR MESSAGE IS SHOWING
Fault Explanation
RTD OPEn Rtd measuring circuit is open.
bAd rtd Rtd resistance is outside the range expected for a Pt100 or 22k NtC.
PHgLASS HI pH glass impedance exceeds programmed limit.
PHgLASS LO pH glass impedance is below programmed limit.
AdC FAIL Analog to digital conversion has failed.
Warning Explanation
OuEr rAngE Process variable exceeds the display limit.
In Curr HI Sensor input current exceeds 210 uA.
In Curr LO Sensor input current is a large negative number.
NEED 0 CAL Sensor needs zeroing. Concentration is a large negative number.
tEMP HI temperature reading exceeds 150°C.
tEMP LO temperature reading is less than -15°C
SEnSE OPEn Rtd sense line is open or not connected.
PH In HI mV signal from pH sensor is too big (chlorine only).
NO SOLngnd Solution ground terminal is not connected.
EECHECSUn An EEPRoM byte changed unexpectedly.
EE OF during setup or burn, EEPRoM command list overflowed.
EE Error EEPRoM byte failed to verify.
bAd Gnd Bad ground exists.
FACtCAL transmitter needs factory calibration.
Error Explanation
SLOPE HI Glass electrode slope exceeds 62 mV/pH.
SLOPE LO Glass electrode slope is less than 40 mV/pH.
0 OFFSEt Zero offset exceeds programmed limit.
CAL ErrOr Amperometric sensor sensitivity (nA/ppm) is very large or very small
EEProtECt EEPRoM is write protected
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SECTION 15.0
TROUBLESHOOTING
See Section
15.2.1
15.2.1
15.2.2
15.2.2
15.2.3
See Section
15.2.4
15.2.4
15.2.4
15.2.5
15.2.1
15.2.1
15.2.1
15.2.6
15.2.7
15.2.8
15.2.9
15.2.10
15.2.11
15.2.12
See Section
15.2.13
15.2.13
15.2.14
15.2.15
15.2.16