Vaisala PR-23 Series User Manual

Problem Cause Corrective action
Message HIGH TRANSMITTER
TEMP
The temperature of the motherboard of the Indicating transmitter
e
xceeds 60 °C (140 °F). To read this temperature, select 3 SENSOR
STATUS from the Main menu and check DTR TMP. If the warning persists,
move the transmitter to a cooler place (for example out of the sun).
Message L
OW TRANSMITTER
VOLT
The internal DC voltages of the
transmitter are below
specifications.
Check the power supply input
voltage. If the supply voltage is
within specifications, replace
power supply module, Figure 44
(page 86).
Relays and switches not working Check c
onfiguration, see Viewing system information (page 55), and for
possible correction see Configuring input switches (page 68),
Configuring relays (page 66), and Configuring prism wash (page 77).
Relay status is indicated by LEDs D23, D25 on the Motherboard, see
Diagnostic LEDs (page 89). For switches, check also LED D26 on the
Motherboard indicating that the 3 V DC supply is correct, see Diagnostic
LEDs (page 89).
The wash function can be tested according to Testing prism wash
(page 51).
Output signal error during Normal
oper
ation
If there is no output signal:
• Check wiring, see Electrical connections (page 24).
• Check Diagnostic LED D26, see Diagnostic LEDs (page 89).
If the mA signal does not correspond to the concentration display, check
output signal configuration, see Viewing system information (page 55),
and for possible correction see Configuring mA outputs (page 70). A low
mA signal can also be caused by high resistance in the external current
loop, see Electrical connections (page 24).
A noisy signal can be damped, see Configuring output signal damping
(page 59).
Table 10 Measurement troubleshooting
Problem Cause Corrective action
Message OUT
SIDE LIGHT ERROR The measurement is not possible
because too much outside light
reaches the camera.
Identify the light source (for
example sun shining into an open
tank or a translucent pipe) and
block the light from getting to the
prism at the sensor tip.
PR-23 Series User Guide
IM-EN-PR23-E
94

Vaisala PR-23 Series Specifications

General

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