8 | Maintenance
D-R 290
169
Se
qu.
no.
Warning Cause;
(●) available actions by whom
[073] Measured value 3:
Lower limit value 1 active
The lower limit value 1 of measurement channel 3
has been undershot.
[074] Measured value 3:
Upper limit value 2 active
The upper limit value 2 of measurement channel 3
has been exceeded
[075] Measured value 3:
Lower limit value 2 active
The lower limit value 2 of measurement channel 3
has been undershot.
[076] Measured value 4:
Upper limit value 1 active
The upper limit value 1 of measurement channel 4
has been exceeded
[077] Measured value 4:
Lower limit value 1 active
The lower limit value 1 of measurement channel 4
has been undershot.
[078] Measured value 4:
Upper limit value 2 active
The upper limit value 2 of measurement channel 4
has been exceeded
[079] Measured value 4:
Lower limit value 2 active
The lower limit value 2 of measurement channel 4
has been undershot.
[081] Clock not set The internal real-time clock has not been set.
● Set the clock. If this happens again after the re
start, replace the button cell (CR2032) on circuit
board no. 22
Operating person
nel
[082] Device temperature too high The temperature of the electronics is above 80°C
(176°F)
● Protect the device against exposure to solar ra
diation and / or sources of heat
Operating person
nel
[083] Device temperature too low The temperature of the electronics is below -40°C
(-40°F)
● Insulate the device against cold
Operating person
nel
[084] Initial contamination measure
ment could not be performed
This message is intended only for the manufactur
ing and service processes
[085] Initial reference measurement
could not be performed
This message is intended only for the manufactur
ing and service processes
[086] Calibration of the dust-free
measuring section could not
be performed
The device is not correctly parameterised and ini
tialised
Service technician
[087] LED weak The power of the LED has greatly reduced during
the working life of the device.
● Exchange the LED
Service technician
[088] Internal temperature measure
ment defective
The internal temperature measurement is defective.
● No effect on the operation of the device, but
overheating or undercooling will no longer be
detected
Service technician
[089] Temperature measurement
LED defective
The temperature sensor of the LED is defective
● No effect on the operation of the device, but:
Protective function / automatic switch-off of the
LED if the temperature is too high or too low is
no longer active
Service technician
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