User’s Guide

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OM-SGD-28-M-420

Current Loop Indicator Smart Graphics Display

OM-SGD-28-M-420

Current Loop Indicator

Smart Graphics Display

ORDERING INFORMATION

Standard Display

(Panel meter, fixing kit, quick start guide)

USB Cable

(Type A to mini-B)

OM-SGD-28-M-420

OM-CABLE-USB-A-MF

FEATURES

• 2.8” color TFT screen

• Use PanelPilot software, to setup and customize the display

• Compatible with Windows XP, 2000, Vista and Windows 7

• Over 40 meter templates to choose from

• New templates automatically download in PanelPilot software

• Programmable via the USB interface

• Simple panel mounting solution

• Wide operating voltage of 4V – 30V d.c.

• Measures current from 4-20mA.

• Digital hold

The OM-SGD-28-M-420 is a smart graphics display with a 320 x 240 pixel (QVGA) color display and USB programming interface.

Using the PanelPilot software (available for Windows XP, Vista and Windows 7), users are able to choose from an ever-increasing number of configurations (six voltmeters at launch) which can then be customised to their needs.

Colors, text labels, splash screen and input scaling can all be customised by the user through the software and then uploaded to the

OM-SGD-28-M-420 through the USB connection.

Panel or enclosure installation of the display is simple, using a panel fixing clip to mount the display, and 4 screw terminals to connect the inputs.

Note: Requires fully floating PSU with respect to current loop

SPECIFICATIONS

Accuracy

Linearity

Sample rate

Operating temperature range

Supply voltage

Supply current **

Measurement range

Loop volt drop

* Depending on user calibration settings

** Voltage dependent. See graph on Page 2.

Minimum Typical

0.05

3

0 (+32)

0

0

4

35

4-20

0.4-2.0

Maximum

0.1

±1*

+40 (+104)

30

190

50

5.0

Unit

%

Count

Samples / second

°C (°F)

V d.c.

mA mA

V www.omega.com

Specifications liable to change without prior warning Data Sheet - Issue 1 SL

OM-SGD-28-M-420

Current Loop Indicator Smart Graphics Display

HARDWARE

Screw Terminal Functions

1 NC Do not connect

2 I+ Positive connection from current loop

3 I- Negative connection to current loop, and 0V power supply return

4 V+ Positive power supply connection (4V – 30V d.c.)

Typical Supply Current

200

100

0

4 17

Voltage (V)

30

USB connection

A ‘Type A to Mini-B’ USB cable is required to program and customise the OM-SGD-28-M-420. It typically takes 10 seconds to send a configuration, with an additional 5 seconds needed for the hardware to reset.

The OM-SGD-28-M-420 can be powered directly from USB and is compatible with both USB 1.1 and USB 2.0. The screw terminals and advanced connector can remain connected whilst using USB, but it is not necessary for V+ to be powered.

A USB power supply is available - OM-EL-WIFI-ADAPTOR-UK (UK plug format) or OM-EL-WIFI-ADAPTOR (USA plug format). This may be used as a convenient means to provide a fully floating power supply for the loop indicator.

Display

The display is a 2.8” TFT panel, with a resolution of 320 x 240 pixels and a 16-bit color depth. Any graphics that are uploaded to the meter are automatically converted to this specification. A resistive touchscreen is fitted, for use with supporting applications. Clean the screen with a damp, soft, lint free cloth.

Panel Mounting

The OM-SGD-28-M-420 can be fitted into panels 1mm - 3mm deep.

A silicone seal is included to improve fitting on thin panels. The minimum panel thickness is increased to 2mm if the seal is not fitted. Panel cut-out is 87mm x 54.5mm.

NOTE: The display is NOT protected against moisture or dust.

www.omega.com

Specifications liable to change without prior warning Data Sheet - Issue 1 SL

OM-SGD-28-M-420

Current Loop Indicator Smart Graphics Display

DIMENSIONS

All dimensions in mm (inches)

DIMENSIONS: All dimmensions in mm (inches)

89.5 3.5

89.1 3.5

57.6 2.3

Viewing Area

6.7 0.3

15.0 0.6

5.7 0.2

17.8 0.7

1.9 0.1

19.0 0.7

7.7 0.3

35.1 1.4

14.0 0.6

84.1 3.3

WIRE SIZE: 16-26AWG

PANELPILOT SOFTWARE

Omega’s PanelPilot software is available for download free of charge from www.omega.com. Easy to install and use, the control software runs under Windows XP (Home and Professional Editions), Vista and Windows 7. The software is used to setup the appearance and operation of the meter and then upload these settings to the meter.

Multiple types of meter are supplied with the software. Additional types will be made available to download - see www.PanelPilot.com for details of available meters.

N.B. Do not select any dual channel meters - as these are incompatible with current loop monitoring.

The software allows the following parameters to be configured:

• Meter type

• Text labels (including units and graph labels)

• Background, graph segment and text colors

• Decimal points (entered during scaling)

• Splashscreen image selection (to display a user image, such as a logo, when the meter is powered up)

• Input scaling / calibration (at two points) - fixed for 4-20mA applications www.omega.com

Specifications liable to change without prior warning Data Sheet - Issue 1 SL

OM-SGD-28-M-420

Current Loop Indicator Smart Graphics Display

VARIOUS OPERATING MODES

4 - 30V

4 - 20mA

I+

V Loop

IN1

V+

(100R)

4 - 30V

I-

4 - 20mA

I+

I-

IN1

V+

4 - 30V

PSU 1

4 - 30V

PSU 1

4 - 20mA

I+

I-

IN1

V+

4 - 30V

PSU 2

4 - 30V

PSU 2

4 - 20mA

I+ IN1

0V

V Loop (100R)

4 - 20mA

I+

I-

MEASURING 4-20mA

Power supply to meter must be fully floating

(isolated from the 4-20mA current loop)

+5

V+

0V

IN1

0V

4 - 30V

V Loop

(100R)

I-

+5

4 - 20mA

I+

I-

V Loop

I+

I-

IN1

4 - 20mA

I+

4 - 30V

IN1

(100R)

I+

DIGI1

0V

I-

0V

IN1

I+

DIGI1

I-

I-

IN1

MEASURING 4-20mA

USING A USB POWER SUPPLY

IN1

4 - 30V

DIGI1

0V

0V

DIGITAL HOLD

DIGI1 will hold the display

0V

0V

I+

I-

0V

IN1

I+

I-

4 - 20mA

I+

Each OM-SGD must be powered from a seper-

0V ate, fully floating, power supply

IN1

R

4 - 30V

4 - 30V

R

I+

ALM1 IN1

I-

0V

0V

0V

ALM1

R

4 - 30V

R = (V

S

- V

L

)

S

- V

L

I

L

I

L

)

V

S

= Supply voltage

V

L

= LED Voltage drop

I

L

V

V

I

S

L

L

= Supply voltage

= LED Voltage drop

= LED current

ALARM OUTPUT

Applications that feature an alarm can be connected as above.

ALM1 must not sink more than 10mA maximum each. If supply voltage varies, use an appropriate voltage regulator.

R = (V

S

- V

L

)

I

L

V

V

S

L

I

L

= Supply voltage

= LED Voltage drop

= LED current www.omega.com

Specifications liable to change without prior warning Data Sheet - Issue 1 SL

OM-SGD-28-M-420

Current Loop Indicator Smart Graphics Display

CURRENT LOOP

Internally the OM-SGD-28-M-420 uses a Programmable Gain Amplifier (PGA) to make the best use of available resolution (theoretically there are eight different ranges available to the SGD. However for the 4-20mA application, this is effectively restricted to the 0-2.5 range.

Voltage Range (V)

0 - 1.25

0 - 2.5

0 - 4

0 - 5

0 - 8

0 - 10

0 - 20

0 - 40

Resolution (mV)

0.3

0.6

(4-20mA)

1.0

1.2

2.0

2.4

4.9

9.8

The input voltage range is decided using the two voltages that the user enters in the scaling section of the Panel Pilot software. The software uses the smallest range available, which can accommodate both of the voltages entered by the user.

Note: I+ and I- share a common ground (i.e. not floating or isolated from each other).

ADVANCED CONNECTOR

The DIL IDC socket provides an alternative connection method to the screwteminals (V+, 0V, IN1 and IN2 are duplicated). It also includes provision for future expansion using data buses (SPI and I2C) and alarm ouputs. Some expansion options may require an additional interface board - Visit www.

omega.com for information on which features are currently supported.

0V

DIGI6

DIGI4

DIGI2

ALM2

V+

IN2

14

2

13

DAC1

DIGI5

DIGI3

DIGI1

ALM1

0V

IN1

1 www.omega.com

Specifications liable to change without prior warning Data Sheet - Issue 1 SL

WARRANTY/DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA’s customers receive maximum coverage on each product.

If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service

Department will issue an Authorized Return (AR) number immediately upon phone or written request.

Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser, including but not limited to mishandling, improper interfacing, operation outside of design limits, improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of having been damaged as a result of excessive corrosion; or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating conditions outside of OMEGA’s control. Components in which wear is not warranted, include but are not limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However,

OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any damages that result from the use of its products in accordance with information provided by OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by the company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR

REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF

TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY

AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF

LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of

OMEGA with respect to this order, whether based on contract, warranty, negligence, indemnification, strict liability or otherwise, shall not exceed the purchase price of the component upon which liability is based. In no event shall OMEGA be liable for consequential, incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic

Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical applications or used on humans. Should any Product(s) be used in or with any nuclear installation or activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility as set forth in our basic WARRANTY/DISCLAIMER language, and, additionally, purchaser will indemnify

OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the

Product(s) in such a manner.

RETURN REQUESTS/INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department.

BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED

RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID

PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent breakage in transit.

FOR WARRANTY RETURNS, please have the following information available BEFORE contacting OMEGA:

1. Purchase Order number under which the product was PURCHASED,

2. Model and serial number of the product under warranty, and

3. Repair instructions and/or specific problems

relative to the product.

FOR NON-WARRANTY REPAIRS, consult OMEGA for current repair charges. Have the following information available BEFORE contacting OMEGA:

1. Purchase Order number to cover the COST

of the repair,

2. Model and serial number of the product, and

3. Repair instructions and/or specific problems

relative to the product.

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords our customers the latest in technology and engineering.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.

© Copyright 2014 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied, reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the prior written consent of OMEGA ENGINEERING, INC.

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