GE Druck DPI 150 - User Manual

Druck DPI 150
Pressure Indicator
User manual - K344
GE Infrastructure
Sensing
FS
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20.000
12.875
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Indicator
99 Washington Street
Melrose, MA 02176
Fax 781-665-0780
TestEquipmentDepot.com

Summary

General Introduction

Safety

Manufacturer designed equipment for safe operation as detailed in this manual. User must not use for other purposes.

Pressure

Do not apply pressure greater than the maximum working pressure stated in the specification.

Supervisor Security for the Druck DPI 150

Protect set-up menus; unauthorized access degrades performance and settings. Factory PIN is 0268.

Specification

Conformity

Lists safety and EMC standards (EN61010, EN61326) the product complies with.

Gauge pressure ranges

Lists available gauge pressure ranges in mbar and bar.

Absolute pressure ranges

Maximum working pressure

Specifies the maximum working pressure for different ranges.

Precision

Details the precision, including non-linearity, hysteresis, repeatability, and temperature effects.

Stability

Accuracy

Specifies the accuracy of the instrument, including pressure measurement uncertainty.

Connections

Method of connection 1;8 BSP (G1;8)

Connections for gauge operation

Connections for barometric option

Operation

Front Panel Keys

Explains the function and comments for each front panel key.

Indicator Mode

span high

Setting the upper limit for calibration or span adjustment.

span low

Setting the lower limit for calibration or span adjustment.

User Set-up

Pressure Leak Test

Airspeed Leak Test

test time

Sets the duration for the airspeed leak test.

range

Specifies the airspeed range for the leak test.

results

Airspeed

units

Allows selection of units for airspeed measurement.

tare

Explains the tare function for airspeed measurements.

Supervisor Set-up

analogue output (option must be fitted)

change PIN

communications (SCPI protocol)

Overview

1. Function Description
2. Usage Features
3. Maintenance Features

The Druck DPI 150 is a high-accuracy, single-range pressure indicator designed to provide precise pressure readings in both pressure measurement and aeronautical units. It utilizes a Druck IDOS sensor for its core functionality. The instrument is housed in a molded plastic case with integrated rubber feet, making it suitable for workbench use.

Function Description

The primary function of the DPI 150 is to display pressure readings. It can operate in various modes, including a standard indicator mode, pressure leak test, airspeed leak test, airspeed measurement, and Mach number calculation.

In Indicator mode, the device displays the current pressure reading in selected units. Users can configure the display to show full-scale values, apply filters, and set tare values. The tare function allows the user to zero the displayed value and store the difference (offset) in the pressure sensor's non-volatile memory, which is useful for relative pressure measurements. The device supports a wide range of pressure units, including mbar, bar, Pa, hPa, kPa, MPa, atm, psi, mmHg, mHg, mH₂O, inHg, inH₂O, kgcm², kgm², inH₂O4, ftH₂O, ftH₂O4, and inH₂O60. It also offers options for setting a time constant and band for filtering the displayed readings, which can be useful for stabilizing fluctuating pressure signals. The indicator mode also includes features for setting high and low span values, which are likely used for scaling or alarm functions.

The Pressure Leak Test mode is designed to detect leaks in a pressure system. Users can set a test time, and the device will monitor the pressure change over that period, displaying the start pressure, end pressure, pressure change, and leak rate. This is crucial for ensuring the integrity of pneumatic systems.

Similarly, the Airspeed Leak Test mode, when correctly enabled, performs a leak test specifically for airspeed systems. It functions much like the pressure leak test, allowing users to set a test time and displaying relevant parameters such as start pressure, end pressure, pressure change, and leak rate, but in airspeed units like kts, mph, or km/h.

The Airspeed mode, also requiring correct enablement, directly measures and displays airspeed in kts, mph, or km/h. This mode also includes options for filtering, taring, and setting time constants and bands for signal conditioning.

The Mach mode, when enabled, calculates and displays the Mach number based on the measured pressure and a set reference pressure. Users can set the reference pressure, which is essential for accurate Mach number calculations.

Usage Features

The DPI 150 features a user-friendly front panel with function keys for easy navigation and operation.

• esc key: Steps back one selection without changing the current setting.
• menu OK key: Steps back one selection, sets and saves the value, and selects and enters menus.
• Up/Down arrow keys: Moves the cursor up and down the screen and increases or decreases the value of the selected digit.
• hold key: Freezes the displayed value while the instrument continues measuring. Pressing the key again resumes live display.
• zero key: Changes the displayed value to 0.000 and stores the offset in the pressure sensor's non-volatile memory.
• Soft keys (left and right): These keys provide context-sensitive functions displayed on the screen, such as "Hold," "Filter," "Tare," "start," and "settings."

The instrument offers several set-up menus for customization:

• User Set-up: Allows users to adjust display contrast, backlight settings, resolution (4, 5, 6, or 7 digits), and preferred units for all modes.
• Supervisor Set-up: This menu is protected by a 4-digit PIN (factory set to 0268) to prevent unauthorized access. It allows for changing the PIN, configuring analogue output options (voltage or current, with user-defined limits), setting communication parameters (RS232 or IEEE 488, including Baud Rate, Parity, and Handshake), and selecting the display language. Entering '0000' disables the security facility.
• Calibration Set-up: Also PIN-protected, this menu is for calibration purposes and requires referring to the Service Manual K382.

The DPI 150 supports various connections on its rear panel:

• Power supply: Requires 11-26V AC or DC, 10VA.
• External sensor connector: For UPM or UPM-P sensors.
• IEEE 488 (option): For communication with other instruments.
• RS232 connector: For serial interface communication.
• Gauge pressure connector: G1/8 or 1/8 NPT.
• Barometric pressure connector: G1/8 or 1/8 NPT (option E).
• Analogue output connector (option): For voltage or current output.

The device can be used as a bench stand by lifting its front to provide a better display angle and easier key-pad access. It can also be panel mounted using an optional kit, which requires removing the rubber feet and securing side and front plates into a panel cut-out. Adequate air circulation is important for panel-mounted installations to cool the instrument.

Maintenance Features

The manual emphasizes the importance of safety during operation and maintenance. Users are advised to switch off the power supply and depressurize pipes before connecting or disconnecting the instrument. Only suitably qualified personnel should perform procedures outlined in the manual.

The Status menu provides important information about the device:

• Software build: Displays the versions of the main, boot, internal IDOS, and external IDOS software.
• Hardware build: Shows the hardware configurations, including supported pressure ranges.
• Calibration history: Provides information on past calibrations.
• Serial number: Displays the instrument's serial number and the serial numbers of internal and external IDOS sensors.
• Options fitted: Lists the specific options installed on the device, such as airspeed and Mach capabilities.

The supervisor and calibration menus are PIN-protected to prevent unauthorized changes that could degrade performance or accuracy. If using a power adaptor not supplied with the instrument, it must comply with SELV safety requirements of EN61010. For technical advice or service, users are directed to contact the manufacturer or subsidiary.

GE Druck DPI 150 Specifications