Druck LP 1000 Data sheet

Measurement & Control Solutions

LP 1000 Series

Druck Ultra Low Pressure Sensor

The LP 1000 Series wet/wet dierential pressure transmitter is ideally suited for use in clean room HVAC monitoring and control. The device oers several improvements over traditional sensors such as user-accessible damping, excellent longterm stability, and wet/wet dierential operation where conductive uids may be exposed to the measurement diaphragm.

The LP 1000 Series oers a dramatic improvement in reliability with improved stability and the ability to tolerate condensing media. The design has been eld proven with more than 10 years in applications where high humidity and condensing media are a daily occurrence. The damping adjustment feature allows the user to slow the response time to eliminate nuisance trips of alarms when doors are opened and closed.

The DC version adds the ability to switch the pressure ports to the front of the device, thus permitting calibration to be performed from the front of the panel, eliminating the need for additional personnel behind the panel. Optional adjustable set-point Red and Green Status LEDs are available.

Features

• Ranges: ±0.1 inH2O to ±1 psi (0.25 to 70 mbar)

• Accuracy to ±0.25 % Full Scale (FS)

• Wet/wet dierential pressure

• User-accessible damping (10 ms to 2 s)

• LCD display models available

• Red/green status LEDs

LP 1000 Series Specications

Load Impedance

Voltage output 5 kW minimum Current output RL ( kW) < (Vsupply - Vs) 20

Pressure Measurement

Operating Ranges

0.25, 0.5, 1.0, 1.25, 2.0, 2.5, 5.0, 6.25, 7.5, 10, 12.5, 15, 20, 25, 40, 50, 70 mbar (0.1, 0.2, 0.25, 0.5, 0.8, 1, 2, 2.5, 3, 4, 5, 6, 8, 10, 16, 20 inH2O and 1 psi) unidirectional and bidirectional (other pressure units available, see ordering information).

Overpressure

• 250 mbar (3.5 psi) for ranges 0.25 to 2.5 mbar (0.1 to 1 inH2O)

• 700 mbar (10 psi) for ranges 5 to 15 mbar (2 to 6 inH2O)

• 1200 mbar (17 psi) for ranges 20 to 70 mbar (8 inH2O to 1 psi)

Maximum Static (Line) Pressure

2 bar (30 psi) for all ranges

Electrical Supply Voltage Power Supply (Vs) (at the terminals)

Current output without display 10 to 30 VDC Current output with display 15 to 30 VDC Current output with display and LED indicators 20 to 30 VDC Voltage output 10 to 30 VDC Voltage output (0 to 10 VDC) 15 to 30 VDC

Performance

Combined Eects of Non-linearity, Hysteresis and Repeatability

±0.5% FS Best Straight Line (BSL ) ±0.25% FS BSL (optional)

Static Pressure Eects

Eects may be zeroed out at operating line pressure

Stability

At standard conditions will not change by more than 1% FS averaged over one year

Supply Sensitivity

<0.05% FS per volt

Compensated Temperature Range

0 to 50° C (32 to 122° F)

Temperature Eects

Over the range 32 to 122 °F (0 to 50° C)

• Ranges from 0.1 inH2O to 0.5 inH2O ±0.01 inH2O

• Ranges from 0.8 inH2O to 1 inH2O ±0.02 inH2O

• Ranges from 2 inH2O to 3 inH2O ±0.05 inH2O

• Ranges from 4 inH2O to 6 inH2O ±0.10 inH2O

• Ranges from 8 inH2O to 14 inH2O ±0.20 inH2O

• Ranges from 16 inH2O to 28 inH2O ±0.40 inH2O

Output Signal Option

Unidirectional Voltage 0 to 2.5 VDC 0 to 5 VDC 0 to 10 VDC 1 to 6 VDC Current 4 to 20 mA Bidirectional Voltage 2.5 ±2.5 VDC 5 ±5 VDC Current 12 ±8 mA

Note: Voltage outputs are three wire, current outputs are two wire.

Zero Oset Adjustment

±5% FS

Span Adjustment

±5% FS

Response Time

User-adjustable 10 ms to 2 s (factory default setting 10 ms)

Environmental

Protection

Type 3 IP 64 (Except with C2 screw terminals)

Temperature Range

0 to 50° C (32 to 122° F)

Humidity

0 to 100% RH, non condensing.

Mounting Position Eect

No eect on span, possible zero shift correctable by potentiometer adjustment.

Note: Factory calibrated with diaphragm in the vertical plane.

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