Arthur Grillo PFT Series Çalıştırma ve Kurulum Talimatları - Sayfa 5

Verici Arthur Grillo PFT Series için çevrimiçi göz atın veya pdf Çalıştırma ve Kurulum Talimatları indirin. Arthur Grillo PFT Series 16 sayfaları.

2.

Product description

Our PFT are combined measuring transducers for the measurement of rel. humidity and
temperature.
Special features of the individual devices:
PFT22
- Two analog outputs:
1. Temperature with four switchables measuring ranges
2. relative humidity.
PFT25
- Two analog outputs:
1. Temperature -30...+50 °C
2. relative humidity, dew point temperature, enthalpy;
Special version: Absolute humidity
PFT28
- Display
- Selectable analog output: 0/2...10 V or 0/4...20 mA
- Two analog outputs:
1. Temperature -30...+50 °C
2. relative humidity, dew point temperature, enthalpy;
Special version: Absolute humidity
For the application areas of sewer / pipe systems, indoor area or in the outdoor and wet
area, we provide various special designed housings.
Our PFT22 and PFT25 are both designed as two-wire technology with two output signals
of 4...20 mA or as three-wire technology with two outputs of 0...10 V. The supply voltage
of the two-wire technology is 15...30 Vdc, in three-wire technology it is 24 Vdc or 24 Vac.
As PFT28 it is supplied with 15...30 Vdc or 24 Vac, with a jumper the output signals can be
switched from 0/2...10 V to 0/4...20 mA.

2.1 Intended use

The combined transducers of the PFT series are used for measuring / signal transmission
of relative humidity and temperature in the application area of heating and air-conditioning.

2.2 Functional description

Our PFT devices are equipped with a single-chip sensor for an optimal measurement of
relative humidity and temperature. Depending on the application the sensor chip is located
in a stainless steel probe tube or is housed directly in an ABS plastic housing. The signi-
ficant parts of sensors are: Two sensor units (capacitive measuring principle for relative
humidity and semiconductor principle for temperature), a signal amplification, a 14-bit
A / D converter and a digital two-wire interface. Furthermore, there is a OTP memory
located on this chip, which stores the calibration data of both capturing principles. The
signal transmission from sensor to evaluation electronics takes place digitally. The sensor
Doc.-no.: PFT_01_EN
PRODUCT DESCRIPTION
Issue: 05/2017
5