Technical Data - S+S Regeltechnik Premasgard 814 Modbus Série Notice D'instruction

G
®
PREMASGARD
Maintenance-free microprocessor-controlled PREMASGARD
housing with quick-locking screws, optionally with ⁄ without display, with a plastic sinter filter (exchangeable), to exactly detect the relative humidity
(0...100% r.H.) and the temperature (–35...+80 °C) in ducts and to measure the differential pressure (max. –7000...7000 Pa) in air. Incl. mounting
flange and connection set ASD-06 (2m connecting hose, two pressure port nipples, screws).
The pressure sensor is applied to measure positive, negative or differential pressure in clean air and gaseous media. It is used in the clean room,
medical and filter technology, ventilation and air conditioning ducts, spray booths, large-scale catering facilities, for filter monitoring and level
measurement or for triggering frequency converters.
A long-term stable, digital humidity and temperature sensor and a pressure sensor with piezoresistive measuring element guarantee exact
measurement results. These measurands are used to internally calculate the following parameters that can be retrieved via Modbus: temperature
[°C], relative humidity [% r. H.], dew point [°C], absolute humidity [g ⁄m³], mixture ratio [g ⁄ kg], enthalpy [kJ ⁄ kg] (ignoring atmospheric air pressure),
differential pressure [Pa], volume flow [m
Innovative Modbus sensor with galvanically separated RS485-Modbus-interface, selectable bus termination resistance, DIP switch for setting the
bus parameters and bus address in current-free state, LEDs for telegram status display, two separate push-in terminals and large three-line display
(illuminated; with customised programming in the 7-segment and dot-matrix range). The sensor is factory-calibrated; an environmental precision
adjustment by an expert is possible.

TECHNICAL DATA

Power supply:
Power consumption:
Data points:
HUMIDIT Y
Sensors:
Sensor protection:
Measuring range, humidity:
Operating range, humidity:
Deviation in humidity:
TEMPERATURE
Measuring range, temperature:
Deviation in temperature:
PRESSURE
Type of pressure:
Pressure connection:
Measuring range, pressure:
Accuracy, pressure:
Above- ⁄ below-pressure:
Zero point offset:
Medium:
Media contacting parts:
Media temperature:
Hysteresis:
Linearity:
Temp. drift values:
Long-term stability:
814x - Modbus
3
/h], air density [kg ⁄m
24 V AC (± 20 %) and 15...36 V DC
< 4.8 W ⁄ 24 V DC typical; < 6.8 VA ⁄ 24 V AC typical;
peak current 200 mA
differential pressure [Pa], temperature [°C],
relative humidity [% r.h.], dew point [°C],
absolute humidity [g ⁄ m
enthalpy [kJ ⁄ kg], volume flow [m
digital humidity sensor with integrated temperature sensor,
low hysteresis, high long-term stability
plastic sinter filter, Ø 16 mm, L = 35 mm, exchangeable
(optional metal sinter filter, Ø 16 mm, L = 32 mm)
0...100 % r. H.
0...95 % r. H. (without dew formation)
typically ± 2.0 % (20...80 % r. H.) at +25 °C, otherwise ± 3.0 %
–35...+80 °C
typically ± 0.2 K at +25 °C
differential pressure
with metal connection nozzles for pressure hose Ø 6 mm
(optional on request with quick connect for PVC fabric pressure hose Ø 6 mm)
–500... +500 Pa or
–7000...+7000 Pa
depending on the type of device, see table
Type 8148 (500 Pa): typically ± 3 Pa at +25 °C
Type 8147 (7000 Pa): typically ± 35 Pa at +25 °C
compared to the calibrated reference device
max. ± 50 kPa
± 10 % of final value
clean air and non-aggressive, non-combustible gases
Brass, Ni, thermoset plastic, Si, epoxy, RTV, BSG, UV silicone gel
–20...+50 °C (temperature-compensated 0...+50 °C)
0.3 % of final value
< ± 1 % of final value
± 0.1 % ⁄ °C
± 1 % per year
® 814x - Modbus (Series) with Modbus connection, in an impact-resistant plastic
3
].
3 ], mixing ratio [g ⁄ kg],
3 /h], air density [kg ⁄ m
14
3 ]
Rev. 2021 - V13
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