Vaisala PR-23 Series User Manual

DISPLAY
KEYBOARD
H1 interface card
Transmitter motherboard
Transmitter processor card
mA outputs
A
B
3VDC
24VDC
~
24 V/3 V
DC/DC
Y
POWER G
D16
G
D23
Relay 1
G
D17
Y
D26
G
G
G
R
R
D25
Relay 2
G
Y
Power supply
module
LD1
LD2
LD3
LD4
Figure 48 Diagnostic LED functions
9.1.3
Display unreadable
If the display is unreadable because of extreme display backlight and contrast settings or
wrong display language, you can perform a display reset. A display reset temporarily
restores the display backlight and contrast to their factory settings and returns the display
language to English.
For the display reset, access the DTR keyboard directly. Then perform the following steps.
1. Switch o the DTR power.
2. Press and hold the decimal point key on the keyboard.
3. Switch on the DTR power.
Chapter 9 – Troubleshooting
91

Vaisala PR-23 Series Specifications

General

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