Vaisala PR-23 Series User Manual

Problem Cause Corrective action
Message SHORT-CIRCUIT
The current in the cable to the
sensor A/B exceeds 60 mA. First,
the DTR attempts fora short time
to reconnect with the sensor in
question. If the short-circuit
persists, the sensor in question is
switched o completely to protect
the Motherboard from overheating.
See also Diagnostic LED LD2/LD4,
Diagnostic LEDs (page 89)
If two sensors
are connected
to the DTR, a
short-circuit in
one of the
cables may
disturb the
measurement of
both sensors as
DTR attempts to
reconnect. The
measurement of
the non-
aected sensor
returns to
normal as soon
as the short-
circuited sensor
is switched o.
If the DTR detects a short-circuit
that persists, the aected sensor is
switched o to prevent further
damage. The message SHORT-
CIRCUIT stays on the screen until
the DTR is powered o and on.
See also Diagnostic LED LD2/LD4,
Diagnostic LEDs (page 89)
The most likely cause of these messages is a problem in the cable
connecting the sensor in question to the DTR. Check that the cable is
undamaged and replace it if necessary, then turn the DTR o and back
on.
Message HIGH SENSOR HUMIDITY Tells that humidity measured at the Sensor processor card exceeds 60 %
relative humidity. The reason may be moisture leaking in through prism
seal or the cover being open. Also, check and, if necessary, replace prism
seal.
Message HIGH SENSOR TEMP The temperature on the Sensor
processor card exceeds 65 °C
(150 °F). To read this temperature,
select 3 SENSOR STATUS from the
Main menu.
For action, see Choosing sensor
mounting location (page 17).
Chapter 9 – Troubleshooting
93

Vaisala PR-23 Series Specifications

General

Brand	Vaisala
Model	PR-23 Series
Category	Measuring Instruments
Language	English