Vaisala K-PATENTS PR-23 Series, Instruction Manual, Page: 158 / 246

148 PR-23 instruction manual
10.3 Specifications
10.3.1 Indicating transmitter specifications
Display: 320x240 pixel graphical LCD with LED backlight
Keypad: 18 membrane keys
Current output: Two independent current sources, 4-20 mA, max.
load 1000 Ohm, galvanic isolation 1500 VDC or AC
(peak), hold function during prism wash
Power: AC input 100-240 VAC, ±10%, 50/60 Hz/30 VA,
optional 24 VDC, Overvoltage Category II, Pollution
Degree 2 (DTR), Pollution Degree 3 (sensor)
Alarms/Wash relays: Two built-in signal relays, max. 250 V/3 A
Input switches: Four switch inputs.
Current outputs: Two current outputs configurable independently to
indicate process concentration or temperature of
either sensor.
Sensor connectivity, DTR: One or two sensors can be connected to the
transmitter. Sensors independent of each other:
own parameter sets and usable in different
applications.
Sensor connectivity, STR: Only one sensor can be connected to the transmitter.
Used with the Intrinsically safe sensor PR-23-...-IA.
Transmitter protection class: Enclosure IP66, Nema 4X
Installation: Transmitter indoor, sensor indoor/outdoor, relative
humidity 80% max
Indicating transmitter weight: 4.5 kg (10 lbs)
10.3.2 Interconnecting cable specifications
Cable: IEC 61158-2 compliant two-wire cable:
two signal wires and shield
copper area 0.8 mm
2
(18 AWG)
cable resistance 24 Ohm/km (per wire)
cable attenuation 3.0 dB/km @ 28 kHz
Cable length: Standard 10 m (33 ft), max. total length 200 m
(660 ft)
Note: For information on the intrinsically safe cabling for PR-23-...-IA, see Sec-
tion 9.11.2 on page 140.