Diagnostic Values; Temperature Measurement; Sensor Head Humidity - Vaisala K-PATENTS PR-23 Series Instruction Manual

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5.4.4 Diagnostic values

The values at the left of the graph are used for diagnostic purposes:
– is the final concentration value including Field calibration adjustment, see
CONC
Figure 6.12.
– , see Section 5.4.5.
TEMP
– gives the position of the shadow edge on CCD in %.
CCD
– is the refractive index value n
nD
– is the calculated concentration value without Field calibration adjustment,
CALC
Section 6.4.3
– or Quality Factor is a value in the range 0–200. It measures the image sharp-
QF
ness, a typical good value is 100. A QF value below 40 usually indicates prism
coating.
– is a measure of the amount of light from the light source in %. Should be below
LED
100 %.
– = sensor head temperature, see Section 5.4.5.
HD TMP
– = sensor head humidity, see Section 5.4.6.
HD HUM
– value shows the current to sensor, the nominal value is 40 mA.
I_SNS
– = Indicating transmitter temperature, see Section 5.4.5.
DTR TMP
– gives the voltage from the power module, the nominal value is 24V.
DTR V1
– gives the DC supply voltage, the nominal value is 3.3 V.
DTR V2
Note: The Slope display also has a soft key
restart the current sensor (see upper left corner of the display for sensor letter) after
a sensor software update.

5.4.5 Temperature measurement

The system contains three different temperature measurements displayed to the left
of the graphs in Figure 5.8:
is the process temperature used for automatic temperature compensation in the
TEMP
Indicating transmitter (Section 6.4, "Calibrating the concentration measurement").
HD TMP measures the temperature on the Sensor processor card PR-10100 (Fig-
ure 2.1).
measures the temperature on the Motherboard of the Indicating transmitter
DTR TMP
(Figure 3.7, "Motherboard of the Indicating transmitter for AC power").
Both sensor head temperature and DTR temperature are monitored by the built-in
diagnostics program, see Sections 8.1.8, "Message
".
HIGH TRANSMITTER TEMP

5.4.6 Sensor head humidity

The Sensor processor card contains also a humidity sensor. The value
relative humidity inside the Sensor. It is monitored by the diagnostics program, see
Section 8.1.7, "Message
from the sensor.
D
SENSOR RESTART
".
HIGH SENSOR HUMIDITY
PR-23 instruction manual
which can be used to
", and 8.1.9, "Message
HIGH SENSOR TEMP
HD HUM
is the