K-Patents PR-01-S - Manual (Page 50)

INSTRUCTION MANUAL FOR K-PATENTS PR-01-S (-AX/FM/CS) DOCUMENT/REVISION No. INM 1/14
Effective: May 15, 2009
48
HIGH PROCESS TEMPERATURE:
The process temperature exceeds the "High temperature limit" set from keyboard after Calibrate/Temperature.
This alarm can be enabled/disabled. The cause may be abnormal process conditions or a leaking prism wash
steam valve.
LOW LIGHT INTENSITY:
The shadow edge is still detected, but the light intensity is low, see Figure 6.54. This message probably
indicates onset of prism coating.
DIP IN IMAGE:
Inspect the optical image for irregularities. Missing or low pulses in the light area may be caused by a speck of
dust on the CCD window or optical fiber end.
**WASH STOP / EXT. STOP **:
Caused if an input switch is activated for external wash stop and the corresponding input switch is connected,
Section 2.8.
HIGH CONC/PRISM COATED:
Indicates prism coating.
Action: Clean the prism surface. Use a strong solvent like nitric acid. If message persists, check optical
image, Section 6.5, decision according to Figure 6.54.
Note: May be caused by exceptionally high concentration.
** EXTERNAL OUTPUT FAULT **:
The External Output unit (Section 10.1) did not acknowledge the transmission. Serial bus or Output unit
failure. The Output unit may also be disconnected.
To prevent this message when the Output unit is disconnected, key in Calibrate/Parameters/Output
signals/External output/Source and select: "Not defined".
** RELAY UNIT FAULT **:
The Relay unit (Chapter 9) did not acknowledge the transmission, Serial bus or Relay unit failure. Maybe
the Relay unit is not connected.
To prevent this message when the Relay unit is disconnected, key in Calibrate/Parameters/Relays/Relay
unit and select "Not defined" for each relay.
** TEMP MEASUREMENT FAULT **:
Indicates that the temperature value reported by the sensor corresponds to a value below -50 °C or above
+250 °C by a margin of 10 %. Probably temperature sensor failure, see Section 6.6.
When the message is "Temp. measurement fault", the temperature will be set to TNM (one of the
CONC(RI) parameters). This value is then also used in the temperature compensation, which means that
the output will be reasonable even at temperature measurement failure.
Action: Change temperature sensor.