Omega Products Inc Crib Toy DP3001 User Manual

User’s Guide

™

http://www.omega.com

e-mail: [email protected]

DP3001

DIGITAL PANEL VOLTMETER

TABLE OF CONTENTS

SAFETY CONSIDERATIONS ......................................................................................... iii

1.0 GENERAL INFORMATION ........................................................................................ 1

2.0 SPECIFICATIONS..................................................................................................... 1

2.1 Analog Input ......................................................................................................... 1

2.2 Reference Input for 3-Wire Ratio.......................................................................... 1

2.3 Noise Rejection .................................................................................................... 1

2.4 Accuracy at 25°C.................................................................................................. 2

2.5 Digital Inputs......................................................................................................... 2

2.6 Analog-to-Digital Conversion................................................................................ 2

2.7 Display.................................................................................................................. 2

2.8 Power ................................................................................................................... 2

2.9 Environmental ...................................................................................................... 2

2.10 Mechanical ........................................................................................................... 3

3.0 MECHANICAL ASSEMBLY & INSTALLATION.......................................................... 3

3.1 Case Dimensions ................................................................................................. 3

3.2 Panel Mounting .................................................................................................... 4

4.0 POWER & SIGNAL .................................................................................................... 5

4.1 Changing Operating Voltage................................................................................ 5

4.2 Power and Signal Connections ............................................................................ 5

4.3

Main Board Pin Assignments ............................................................................... 6

4.4 Signal Inputs......................................................................................................... 8

5.0 CONFIGURATION .................................................................................................... 9

5.1

Decimal Point Selection ....................................................................................... 9

5.2 Voltage Range Selection.................................................................................... 10

6.0 CALIBRATION.......................................................................................................... 11

7.0 DRAWINGS.............................................................................................................. 12

8.0 DUAL-SLOPE CONVERSION.................................................................................. 13

LIST OF FIGURES:

Figure 3.1 DIN Case Dimensions.................................................................................. 4

Figure 3.2 Exploded View.............................................................................................. 5

Figure 4.1 Side View of Transformer............................................................................. 6

Figure 4.2 Rear Terminal Hookups ............................................................................... 7

Figure 5.1 Display Board Jumper Locations................................................................ 10

Figure 5.2 Main Board Jumper Locations.................................................................... 11

Figure 5.3 Solder Switch Locations............................................................................. 12

Figure 7.1 Assembly Diagram, Main and Display Board............................................. 13

Figure 8.1 Dual-slope Conversion Diagram ................................................................ 14

SAFETY CONSIDERATIONS

This device is marked with the international Caution symbol. It is important to read

this manual before installing or commissioning this device as it contains important

information relating to Safety and EMC (Electromagnetic Compatibility).

Unpacking & Inspection

Unpack the instrument and inspect for obvious shipping damage. Do not attempt to

operate the unit if damage is found.

This instrument is a panel mount device protected in accordance with Class I of EN

61010 (115/230 AC power connections). Installation of this instrument should be done by

Qualified personnel. In order to ensure safe operation, the following instructions should

be followed.

This instrument has no power-on switch. An external switch or circuit-breaker shall be

included in the building installation as a disconnecting device. It shall be marked to

indicate this function, and it shall be in close proximity to the equipment within easy reach

of the operator. The switch or circuit-breaker shall not interrupt the Protective Conductor

(Earth wire), and it shall meet the relevant requirements of IEC 947-1 and IEC 947-3

(International Electrotechnical Commission). The switch shall not be incorporated in the

mains supply cord.

Furthermore, to provide protection against excessive energy being drawn from the mains

supply in case of a fault in the equipment, an over-current protection device shall be

installed.

•

The Protective Conductor must be connected for safety reasons. Check that the

power cable has the proper Earth wire, and it is properly connected. It is not

safe to operate this unit without the Protective Conductor Terminal connected.

•

Do not exceed voltage rating on the label located on the top of the

instrument housing.

•

Always disconnect power before changing signal and power connections.

Do not use this instrument on a work bench without its case for safety

reasons.

•

Do not operate this instrument in flammable or explosive atmospheres.

Do not expose this instrument to rain or moisture.

Unit mounting should allow for adequate ventilation to ensure instrument

does not exceed operating temperature rating.

•

Use electrical wires with adequate size to handle mechanical strain and

power requirements. Install without exposing bare wire outside the connector

to minimize electrical shock hazards.

EMC Considerations

• Whenever EMC is an issue, always use shielded cables.

• Never run signal and power wires in the same conduit.

• Use signal wire connections with twisted-pair cables.

• Install Ferrite Bead(s) on signal wires close to the instrument if

EMC problems persist.

iii

1.0

GENERAL INFORMATION

This voltmeter is a 4 1/2 digit panel meter for applications which require

a compact, quality DC voltmeter. This model uses dual-slope conversion.

Additionally, it provides automatic zeroing before each reading and does so with

a minimum of parts for increased reliability.

The voltmeter has a resolution of 1 part in 19999 counts. By using an external

DC voltage reference, any of the given ranges can be conﬁgured for 3-wire

(common ground) ratio measurement with readout from 0 to 1.9999.

Standard features include selectable decimal point location, display hold, test and

blanking. Each model contains the required circuitry for full range selection and

easy conﬁguration.

2.0

SPECIFICATIONS

2.1

ANALOG INPUT

Model

Range

Resolution

Maximum input

Input resistance

Bias current

-3

1.9999 Vdc

0.1 mV

250 V rms, 350 Vp 250 V rms, 1000 Vp 250 V rms,1000 Vp

-4

19.999 Vdc

1 mV

-5

199.99 Vdc

10 mV

1 Gohm

10 pA

1 Mohm

1 pA

1 Mohm

1 pA

Conﬁguration

Zero

Span adjustment

differential

automatic

2.2

2.3

REFERENCE INPUT FOR 3-WIRE RATIO

Analog input range

Reference voltage

Load on reference

Accuracy

2 Vdc, 20 Vdc, 200 Vdc

+0.5 to +2.0 V

80 ohm (std), 100 Mohm (opt)

99.95%

NOISE REJECTION

NMR, sig hi to sig lo

56 dB at 50/60 Hz

CMR, sig lo to ana gnd

CMV, sig lo to ana gnd

CMR, ac gnd to ana gnd

CMV, ac gnd to ana gnd

86 dB from DC to 60 Hz

1.0 Vdc

120 dB from DC to 60 Hz

2100 Vp per HV test, 354 Vp per IEC 348 spacing

2.4

ACCURACY AT 25°C

Maximum error

0.01% of reading 2 counts

0.01% of reading/°C

1 second

Span tempco

Step response

Warm-up to rated accuracy

10 minutes

2.5 DIGITAL INPUTS Positive true referenced to DIG GND

Input

HOLD

Logical 0

0 to 0.8 V

0 to 0.6 V

Logical 1

Sink

Source

10 µA

20 µA

2.8 to 5.0 V 0.1 mA

2.0 to 5.0 V 1.3 mA

LAMP TEST

DISPLAY BLANKING 0 to 0.6 V

2.6

2.7

ANALOG-TO-DIGITAL CONVERSION

Technique

Input integration period

Read rate

Dual-slope, average-value

100 milliseconds

2.5/second

DISPLAY

Digit type

7 segments, 14.2 mm (0.56 in) height

-1.8.8.8.8

Symbols

Decimal Points

4 positions, programmable internally or

at the rear connector

Overrange indication

4 least-signiﬁcant digits ﬂash

2.8

2.9

POWER

Standard AC power voltage

AC frequency range

Optional DC power voltage

Power consumption

115 or 230 Vac 15%

49 to 440 Hz

9-32 or 26-56 Vdc, isolated to 300 Vp

2.4 W

Output voltages

+4.7 Vdc 5% at 10 mA max

-4.6 Vdc 5% at 10 mA max

ENVIRONMENTAL

Operating temperature

Storage temperature

Relative humidity

0 to +60°C

-40 to +85°C

95% RH to +40°C (non-condensing)

2.10

MECHANICAL

Bezel

96 x 48 x 5.1 mm (3.78 x 1.89 x 0.20 in)

104 mm (4.09 in)

Depth behind bezel

(with connector)

Panel cutout

Weight

92 x 45 mm (3.62 x 1.77 in)

400 g (14 oz)

Case material

D1 connector option

(non-CE)

D4 connector option

(CE)

94V-0 UL-rated polycarbonate

PCB edge connector with a double row of

18-pins, 3.96 mm (0.156 in) spacing between pins

Barrier terminal strip with six #6 screw

connections for signal and power (removes

these inputs from D1)

3.0

MECHANICAL ASSEMBLY AND INSTALLATION

3.1

CASE DIMENSIONS

Figure 3.1 DIN Case Dimensions

TAB

I.D. LABEL

CASE, TOP

SLIDE SCREW (2)

SLIDE CLAMP (2)

PARALLEL BCD

OUTPUT BOARD

(F2N OPTION)

SLIDE RETAINER (2)

TERMINAL

BLOCK

COVER

SIGNAL INPUT

POWER INPUT

LENS

MAIN BOARD

SPAN ADJUST

CASE, BOTTOM

Figure 3.2 Exploded View

3.2

PANEL MOUNTING

1. Remove main board connector J1, if installed. Loosen the two clamp screws

(with a #8 Phillips screwdriver) on the rear of case and rotate the slide

clamps. Push the two slide retainers toward the rear of the unit and remove

them.

2. Working from the front of the panel, insert the meter into the panel cutout

(refer to case dimensions shown below).

3. Push the slide retainers onto the case to ﬁt tightly against the panel rear.

Rotate slide clamps back into original position and tighten clamp screws just

enough to hold the case in place. Never over-tighten clamp screws.

4. Reinstall any connectors and snap on the terminal block cover.

4.0

POWER AND SIGNAL

AC versions of the voltmeter are factory-set for 115 Vac in the USA and 230 Vac in

Europe (using C1 option) 15% operation. DC versions are preset for 9-32 Vdc or

26-56 Vdc operation. It is not possible to change the meter from 9-32 Vdc to

26-56 Vdc or vice versa. Different static inverters are installed by the factory.

Refer to Safety Considerations prior to connecting power.

CHANGING OPERATING VOLTAGE

4.1

Remove power lines from the meter, then remove the meter from the case.

Input

Jumper Installation

Remove W8 and W9 on the transformer

Install W4 on the printed circuit board

Remove W8 and W9 on the transformer

Install W4 on the printed circuit board

230 Vac 15% (Option C1)

115 Vac 15% (Standard)

Figure 4.1

Side View of Transformer

4.2

POWER AND SIGNAL CONNECTIONS

Use shielded, twisted cable for the input signal, with the shield terminated to analog

ground at the connector. Both analog and digital ground are internally connected and

should not be connected externally. For proper grounding, connect the low signal to

SIG LO (signal low).

A jumper at S3-A (Figure 5-2 Main Board) ties SIG LO to ANA GND (analog

ground) internally.The common for digital inputs/outputs is connected to DIG GND

(digital ground).This allows current to ﬂow only in the digital ground and prevents IR

drop in the analog ground that would be misread as a signal. A small voltage may

exist between analog and digital grounds on connector J1.

(D4)

(D1)

Figure 4.2

Rear Terminal Hookups

Model

Power

Signal

High

Low

Earth Ground

High

Low

Earth Ground

+ DC

- DC (return)

High

Low

Analog Ground

High

Low

Analog Ground

High

Low

Analog Ground

High

Low

D1 Connector

D4 Connector

D1 Connector

D4 Connector

+ DC

- DC (return)

Analog Ground

Wire Color for AC Power

USA

Other

(High)

Black

White

Green

Brown

Blue

(Low)

(Ground)

Green

4.3

MAIN BOARD PIN ASSIGNMENTS (J1 Card Edge)

Left to right, looking at rear of case

P1 Connection

Standard

Spare (E16)

No connection

Spare (E18)

Spare (E19)

No connection

Spare (E43)

No connection

1999.9 (DP4)

Spare (E24)

199.99 (DP3)

Spare (E23)

19.999 (DP2)

Spare (E22)

1.9999 (DP1)

Spare (E25)

Decimal point select

Spare (E26)

Spare (E27)

–4.6 Vdc power output

Spare (E29)

+4.7 Vdc power output

– Excitation voltage

+ Reference voltage

LAMP TEST (lights display segments)

+ Excitation voltage

Digital ground

HOLD (holds last display reading)

Analog Ground

Spare (E32)

BLANKING (blanks 4 least-signiﬁcant digits)

Spare (E34)

Oscillator (100 kHz output)

No connection

4.4

SIGNAL INPUTS

RATIO: The reference input allows an external voltage to be used as the

reference source for conversion. In this mode, the meter reads the ratio of the

signal voltage to the reference voltage rather than the true value of the input.

Signal Voltage

Reference Voltage

Reading in Counts =

x 10000

On the 20 V and 200 V ranges, the signal voltage must be scaled by 1/10 and

1/100, respectively. For all ranges, the standard reference input impedance ratio

is 80 ohm. For 100 Mohm, open solder switch F on the main board (Figure 5.3).

The reference voltage must be between the limits speciﬁed, +0.5 to +2.0 V, and

must be positive with respect to analog ground.

HOLD: When high (or open), the A/D will free-run with equally spaced

measurement cycles every 40,002 clock pulses. If taken low, the converter will

complete the full measurement cycle and then hold this reading as long as HOLD

is low. A positive pulse (greater than 300 ns) will now initiate a new measurement

cycle, beginning with between 9,001 and 10,001 counts of auto-zero time. If the

pulse terminates before the full measurement cycle (40,002 counts) is complete,

it will not be recognized and the converter will simply complete the present

measurement. An external indication that a full measurement cycle has been

completed is that the ﬁrst strobe pulse will occur 101 counts after the end of

this cycle. Thus, if HOLD has been low for at least 101 counts, the converter is

holding and ready to start a new measurement when pulsed high.

BLANKING: The display may be blanked by grounding the BLANKING input.

The blanking input must be open for normal display operation. The polarity sign

and decimal points are not blanked, but they will ﬂash if the displayed reading

exceeds 19999 counts.

5.0

CONFIGURATION

Select the desired conﬁgurations from the following charts. Install jumpers and

open/close solder switches as indicated. Remove all push-on jumpers not used.

5.1

DECIMAL POINT SELECTION

Figure 5.1 Display Board Jumper Locations

Alternate decimal point conﬁguration

Decimal Point

using main board connector J1.

1.9999

19.999

199.99

1999.9

Connect K to L

Connect J to L

Connect H to L

Connect F to L

5.2

VOLTAGE RANGE SELECTION

Figure 5.2 Main Board Jumper Locations

Solder Switches*

Push-on Jumpers Wire Jumper

Input

Conﬁguration

2 Vdc

20 Vdc

200 Vdc

Open

J, L

H, I, K

W10

Install

Remove

J, L

*Refer to Figure 5.3.

S3-A is used for signal connections. Refer to Section 4 for more information.

Figure 5.3 Solder Switch Locations

Solder switch F is used for reference input impedance ratio.

Refer to Section 4 for more information.

6.0

CALIBRATION

This unit was factory-calibrated with a precision voltage source. Frequent

calibration is not necessary due to the stability and internal accuracy. If calibration

is needed, use the following procedure.

1. Remove the front lens. Insert a blade screwdriver under the notch at the

bottom of the lens and gently pry it off.

2. Short the input signal connections and verify that the display reads zero.

3. Apply an input voltage equal to 95% of the high end of the range selected.

4. At the front panel, adjust the Span potentiometer (shown in Figure 3.2) until

the display reads 19000 1 count.

7.0 DRAWINGS

Figure 7.1

Assembly Diagram, Main and Display Board

8.0

DUAL-SLOPE CONVERSION

At the beginning of a conversion, the voltage across C is zero. The signal is

int

then applied to the integrator and the voltage across C rises by the formula:

int

= Esig R C

Cint

int int

At the end of a ﬁxed period of 10000 counts, T1, the counters are reset to 00000.

The signal input is turned off and a stable reference voltage of the opposite

polarity is now applied to the input. Since the reference voltage is constant, the

slope, in volts/sec, during this second period, T2, is constant and independent of

input signal levels. The time required to discharge the capacitor back to zero volts

is then proportional to the signal voltage. The relationship between the signal

integration time, T1, and the reference integration time, T2, can be expressed by

the formula:

T2 = E T1

sig

ref

After the clock is stopped by the capacitor voltage reaching zero, a third period,

T3, allows the circuit to auto-zero the integrator and comparator for the next

reading. A low level on the HOLD input prevents the reset pulse from starting the

counters.

Figure 8.1

Dual-slope Conversion Diagram

NOTES

______________________________________________________________________________

_____________________________________________________________________________

______________________________________________________________________________

NOTES

______________________________________________________________________________

_____________________________________________________________________________

______________________________________________________________________________

NOTES

______________________________________________________________________________

_____________________________________________________________________________

______________________________________________________________________________

WARRANTY/DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of one (1) year

from the date of purchase. In addition to OMEGA’s standard warranty period, OMEGA Engineering will extend the warranty period

for one (1) additional year if the warranty card enclosed with each instrument is returned to OMEGA.

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 which

wear are not warranted, including but 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 it will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES

OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESS 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 hu-

mans. 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 OME-

GA’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:

FOR NON-WARRANTY REPAIRS, consult OMEGA for current

repair charges. Have the following information available

BEFORE contacting OMEGA:

1. Purchase Order number under which the product was

PURCHASED,

1. Purchase Order number to cover the COST of the repair,

2. Model and serial number of product, and

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

and

3. Repair instructions and/or specific problems relative to the

product.

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.

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.

TRADEMARK NOTICE:

, omega.com ,

, and

are Trademarks of OMEGA ENGINEERING, INC.

PATENT NOTICE: This product is covered by one or more of the following patents: U.S. Pat. No. Des. 336,895; 5,274,577/

CANADA 2052599; 2052600 / ITALY 1249456; 1250938 / FRANCE BREVET No. 91 12756 / SPAIN 2039150; 2048066 /

UK PATENT No. GB2 249 837; GB2 248 954 / GERMANY DE 41 34398 C2. Other US and International Patents pending or

applied for.

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M5280/1112

11119ML-99J

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