Omega DP450 User guide

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Page 1

CONTENTS

PAGE

Chapter 1 General Information 1 Chapter 2 Setup 4

DP450-VDC 7 DP450-VAC 7 DP450-DCC 7 DP450-F 8 DP450-HACC 9 DP450-HDCC 11 DP450-E 13

Chapter 3 Alarm/Excitation Options 15

Wiring 17

Chapter 4 General Specifications 18

Chapter 5 Calibration 19

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Chapter 1 General Information

DP450 Series Digital Panel Meters: Low Cost Measurement & Display

The DP450 Series digital panel meters are suitable for a wide range of display applications. Designed as a low cost solution, they offer ruggedness and reliability with 3 1/2-digit (±1999) display for many current, voltage, frequency, and process applications. The DP450 Series are available in 7 separate models.

Model No. Description

DP450-VDC Dc Volt Meter DP450-VAC Ac Volt Meter DP450-DCC Dc Current Meter DP450-E Process Meter DP450-HACC High Ac Current Meter DP450-HDCC High Dc Current Meter DP450-F Frequency Meter

Alarm and Power Options Description

-XPS 10Vdc Excitation Power supply

-A2 Dual Alarm Output with 10Vdc Excitation Power supply

-24VAC 24 Vac Input Power

-220VAC 220 Vac Input Power

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The unit is housed in a standard 1/8 DIN size case. For models measuring Dc Volts, Ac Volts, Dc current and frequency, range is selectable by connecting the input to the proper screw terminal located on the rear of the unit (see Chapter 2, page 6). For process, high AC and high DC current meters, the range and proper display scaling are selected by jumper settings on the main board. Bright red .56 inch high LED characters are easy to read. Instrument power is derived from 115 Vac. Power input options include 24 or 220Vac. Engineering unit labels are supplied to indicate measured units. The decimal point placement is configured by jumper selection located behind the snap-off front lens.

DP1 DP3DP2

ZERO SCALESPAN

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1.77"

(45mm)

PANEL CUT OUT

3.62"

(92mm)

.27"

(7mm)

3.78"

(96mm)

4.92"

(125mm)

5.59"

(142mm)

(18mm)

1.57"

(40mm)

3.54"

(90mm)

.71"

Page 5

Chapter 2 Setup

WARNING!

Dangerous voltages are present at the screw terminals. Always remove power before working in this area for wiring, disassembly, and all other activities that involve proximity to electrical circuitry.

NOTE: The DP450-HACC, DP450-HDCC and DP450-E must be configured to display the desired range. To access the main board and its configuration jumpers, remove the front panel lens, lift the display above and over the latch located at the bottom front of the housing, and slide the assembly out of the case.

To begin making measurements, wire up the voltage, current, or frequency-input wires plus AC line power to the instrument. Because dangerous line voltage is present at the rear terminals when power is applied, hook up the input signal wires first, then the power. Plug in line power only after all connections are secure to the rear screw terminals of the meter. Viewing the meter from the rear, the screw terminals are numbered 1 through 8 from left to right according to the drawing on page 6.

Page 6

TERMINAL

PROCESS

DC SHUNT

TRANS-

CURRENT

FORMER

DC Current

AC Volts

DC Volts

Frequency

REAR

BLOCK

0-20mA

PROCESS

COMMON

0-5VDC SHUNT

HIGH

SHUNT

COMMON

HIGH

COMMON

AC POWER

NEUTRAL

AC POWER

200mA

HOT

20mA

COMMON

600V2mA

200V

20V

200mV5A

6 7

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JP501

POSITION 10

SCALE POT

DP450-E ONLY

POSITION1

REAR VIEW

1 2 53 4 6 7 8

JP501

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DP450-VDC and DP450-VAC

AC or DC Voltmeters accept and display voltage ranges from +/-199.9mV to +/-600Volts. The range is selected by connecting the input to the proper screw terminal located at the rear of the unit. See chart on page 5.

Range Table

RangeVDC Accuracy Resolution 0 to 199.9mV 0.5% 0.1mV 0 to 1.999V 0.5% 1mV 0 to 19.99V 0.5% 10.0mV 0 to 199.9V 0.5% 0.1V 0 to 600V 0.5% 1V

DP450-DCC DC Current

DC Ammeters accept and display current ranges from +/-1.999mA to +/-5.00A. The range is selected by connecting the input to the proper screw terminal located at the rear of the unit. See chart on page 5 .

Range Table

Range ADC Accuracy Resolution 0 to ±1.999mA 0.5% 1uA 0 to ± 19.99mA 0.5% 10uA 0 to ± 199.9mA 0.5% 100uA 0 to ± 1.999A 0.5% 1mA 0 to ± 5.00 A 0.5% 10mA

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DP450-F

The Ac frequency meter is capable of measuring the frequency of an Ac voltage of up to 1kHz throughout an input voltage range of

199.9mV to 600Vac. The voltage range of the frequency being

measured is selected by connecting the input to the proper screw terminal located at the rear of the unit. See page 5.

Input Voltage Accuracy Resolution

199.9mV to 600VAC

0 to 1kHz 0.5% 1Hz

Page 10

DP450-HACC High AC Current

The DP450 HACC high Ac current meter accepts an input of either 1 amp or 5 amp external current transformers and scales the reading to the desired full scale reading of between 50.0 and 2000 amps. Ranges are selected by a combination of jumpers located on the main board (see page 6). No other adjustments are necessary.

The following ranges can be selected as full scale: 50 amps 1000 amps 100 amps 1500 amps 200 amps 2000 amps 500 amps

Use the table on the following page to configure the meter. Example 1. Configure the meter to display 1500 amps Ac

full scale with a 5 amp input. Install jumpers provided on positions 5,7, and 8.

Example 2. Configure the meter to display 1000 amps Ac full scale with a 1 amp input. Install jumpers provided on positions 3 and 10.

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AC HIGH CURRENT

10987654321

JUMPER CONNECTIONS

DISPLAY

50.0/500

100.0/1000

150.0/1500

199.9/1999

50.0/5005 AMP

100.0/1000

150.0/1500

199.9/1999

INPUT

1 AMP

5 AMP

Page 12

DP450-HDCC High Dc Current

The DP450 HDCC high Dc shunt meter accepts an input from 60, 100 and 150 Vdc current shunts and scales the reading to the desired full scale reading of between 50.0 and 2000 amps. Ranges are selected by a combination of jumpers located on the main board (see page 6). No other adjustments are necessary. Use the table on the following page to configure the meter.

The following ranges can be selected as full scale: 50 amps 1000 amps 100 amps 1500 amps 200 amps 2000 amps 500 amps

Example 1. Configure the meter to display 500 amps Dc

full scale with a 100mVDc input. Install jumpers provided on position 3.

Example 2. Configure the meter to display 1999 amps Dc full scale with 60mVDc input. Install jumpers provided on positions 6,7,8 and 9.

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150.0/1500

199.9/1999

150mV

DC HIGH CURRENT

10987654321

JUMPER CONNECTIONS

DISPLAY

50.0/500

100.0/1000

150.0/1500

199.9/1999

50.0/500100mV

100.0/1000

150.0/1500

199.9/1999

50.0/500150mV

100.0/1000

INPUT

60mV

100mV

150mV

Page 14

DP450-E Process

The DP450-E Process meter accepts either voltage or current inputs (0 to 5, 1 to 5 or 0 to 10 Vdc) or (0 to 20mA, 4 to 20mA).

Note: The unit is shipped from the factory calibrated to display 0 to 1000 counts with a 4 to 20mA input signal. If the unit is to be used for 0 to 20mA, 0 or 1 to 5Vdc or 0 to

10Vdc it must be recalibrated according to the instructions in Chapter 5. Voltage or current inputs are selected simply by wiring the inputs to the proper rear terminals by installing removable jumpers located on the main board and adjusting the scaling potentiometer located behind the front panel lens (see figure, page

2). To place the decimal point in the desired location, place the

jumper provided below the main display. Use the table on the following page to scale the meter.

Note: The table on the following page is based on 0 display counts with 0 input. Offsets above zero (maximum 500 counts) will be added to the full-scale range. It may be necessary to change jumper settings to achieve the desired full-scale display range.

Range Table

Sensor Input Accuracy Resolution 0 to 20/4 to 20mA 0.5% 1count of 1999 counts 0 to 5/1 to 5Vdc 0.5% 0 to 10 Vdc 0.5%

Example: Scale the meter to display 200 counts with 4mA input and 1500 counts with 20mA input.

1. Install a single jumper jack on position 6. Input 20.0 mA and

adjust the SCALE pot to 1500 counts.

2. Input 4.0 mA and adjust the ZERO pot to 200.

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3. Repeat steps 1 and 2 until no further adjustment is required.

Volts/Current*

*0 to 20 mA / 0 to 5 or 10 Vdc

PROCESS

10987654321

JUMPER CONNECTIONS

FULL

SCALE

0-100.0%

1070-1999

450-950

200-500

0-100.0%0-10 VDC

1000-1999

525-1000

INPUT

0-10 VDC

450-600

0-10 VDC

Page 16

Chapter 3 Alarm and Excitation Option The alarm option enables the user to set a high and a low alarm limit. When an alarm occurs, a red alarm LED indicator will turn on and a normally open relay contact will close. The LED will turn off and the relay will automatically reset when the alarm limit is no longer exceeded. Two alarms are provided and are designated LOW and HIGH on the front panel. Alarm limits are set by potentiometers located behind the front panel lens.

DP1 DP3DP2

SET HI/LO

JUMPER

COARSE ADJ

ZERO SCALESPAN

FINE

ADJ

ALARM

LOW

COARSE ADJ

ALARM

HIGH

FINE

SET HI/LO JUMPER

SET LOW SET HIGH NORMAL

ADJ

Page 17

Setting the Alarm Limits

Note: Low alarm limits are set by the two coarse and fine potentiometers on the left. High alarm limits are set by the two coarse and fine potentiometers on the right.

STEP 1. Remove power from the instrument and disconnect the

signal input wires. Snap off the front panel lens. Apply power and allow approximately 5 minutes of warm-up time.

STEP 2. Set the HI/LO jumper (located between the display

digits and the adjustment potentiometers) from the normal position to either the SET HI or the SET LO position. See drawing, page

15.

STEP 3. Adjust the coarse potentiometer until the display reads

the value of the alarm limit. Make any final adjustments with the fine adjust pot.

STEP 4. Return the HI/LO jumper to its normal position. STEP 5. Install the front panel lens. Ensure that power is

disconnected before reconnecting signal wires.

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Alarm and Excitation Option Wiring

Blade terminals accessible at the back of the instrument provide connections to the alarm option. Female connectors are supplied to wire the alarm option into your system. Excitation power supply is standard with the dual alarm.

ALM2(HIGH) N.O. RELAY CONTACT

ALM1(LOW) N.O. RELAY CONTACT

TRANSDUCER

EXCITATION

REAR VIEW

1 2 53 4 6 7 8

INPUT

POWER

NEUTRAL

HOT

Page 19

Chapter 4 General Specifications

Stability with Temperature:

±100ppm/°C maximum

Noise Rejection:

NMRR: <40dB, 50/60 Hz CMRR: <130dB w/ 250Ω unbalance typical

Display:

3 1/2 digit, 7-segment red/orange LED, 0.56" (14.2mm) height

Environmental:

0°C to 50°, <85% RH, non-condensing

Case Construction:

One-piece black ABS plastic

Size:

Case: 1/8 DIN 1.57" X 3.54"X 4.56"(4.0cm X 9.0cm X 10.9cm) Bezel: 1.89” X 3.78” (4.8cm X 9.6cm) Panel Cutout: 1.77" X 3.62" (4.5cm X 9.2cm)

Weight:

1lb. (454g)

Power:

115Vac +/- 10%, 50 or 60 Hz 220Vac +/- 10%, 50 or 60 Hz 24Vac +/- 10%, 50 or 60 Hz

Excitation Power Supply

+10 Vdc @ 30mA

Page 20

Chapter 5 Calibration

DP450-VDC DC Volts

Equipment Required:

1. Precision DC voltage source with a resolution to 0.1mV and

an accuracy of ±0.1%

2. Interconnecting copper wire from the DC source to the

indicator.

3. Trimmer adjusting tool.

STEP 1. Disconnect power from the unit and use copper

connecting leads, connect the output of the DC voltage source to terminals 5 (+) and 6 (-) of the indicator according to the chart on page 5.

STEP 2. Remove the front panel lens, reconnect power and allow

for a 5-minute warm-up.

STEP 3. Input 0.0 mV from the DC voltage source and adjust the

ZERO pot for a display of 0.0±1 count. (Refer to the figure on page 15 for the location of the zero and span pots).

STEP 4. Input 190.0 mV from the DC voltage source and adjust

the SPAN pot for a reading of 190.0±1 count.

STEP 5. Repeat steps 3 and 4 until no further adjustment is

needed.

Page 21

DP450-VAC AC Volts

Equipment Required:

1. Precision AC voltage source with a resolution to 0.1mV and

an accuracy of ±0.1%

2. Interconnecting copper wire from the AC source to the

indicator.

3. Trimmer adjusting tool.

STEP 1. Disconnect power from the unit and using copper

connecting leads, connect the output of the AC Voltage source to terminals 5 and 6 of the indicator according to the chart on page 5.

STEP 2. Remove the front panel lens and reconnect power and

allow for a 5-minute warm-up.

STEP 3. Input 0.0 mV from the AC voltage source and adjust the

ZERO pot for a display of 0.0±1 count. (Refer to the figure on page 15 for the location of the zero and span pots).

STEP 4. Input 190.0 mV at the measured frequency from the AC

source and adjust the SPAN pot for a reading of 190.0±1 count.

STEP 5. Repeat steps 3 and 4 until no further adjustment is

needed.

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DP450-F Frequency

Equipment Required:

1. Precision AC voltage source with a resolution to 0.1mV and

an accuracy of ±0.1%

2. Interconnecting copper wire from the AC source to the

indicator.

3. Trimmer adjusting tool.

STEP 1. Disconnect power from the unit and using copper

connecting leads, connect the output of the AC Voltage source to terminals 5 and 6 of the indicator according to the chart on page 5.

STEP 2. Remove the front panel lens and reconnect power and

allow for a 5-minute warm-up.

STEP 3. Input 100.0 mV at 60 Hz from the AC voltage source

and adjust the ZERO pot for a display reading of 60±1count.

STEP 4. Input 100.0 mV @400 Hz from the AC voltage source

and adjust the SPAN pot for a display reading of 400±1count.

STEP 5. Repeat steps 2 and 3 until no further adjustment is

needed.

Page 23

DP450-DCC DC Current

Equipment Required:

1. Precision DC current source with a resolution to 0.1mA and

an accuracy of ±0.1%

2. Interconnecting copper wire from the DC current source to the

indicator.

3. Trimmer adjusting tool.

STEP 1. Disconnect power from the unit and use copper

connecting leads, connect the output of the DC current source to terminals 3 (+) and 6 (-) of the indicator according to the chart on page 5.

STEP 2. Remove the front panel lens, reconnect power and allow

for a 5-minute warm-up.

STEP 3. Input 0.0 mA from the DC current source and adjust the

ZERO pot for a display of 0.0±1 count. (Refer to the figure on page 15 for the location of the zero and span pots).

STEP 4. Input 190.0 mA from the DC current source and adjust

the SPAN pot for a reading of 190.0±1 count.

STEP 5. Repeat steps 3 and 4 until no further adjustment is

needed.

Page 24

DP450-E Process Meter

The DP450-E can be custom scaled to display a full-scale reading from 200 to 1999 counts by installing removable jumpers located on the main board and adjusting the scaling potentiometer located behind the front panel lens.

4-20mA

Equipment Required:

1. Precision DC current source with a resolution of 0.1mA DC

and an accuracy of 0.1%.

2. Interconnecting copper wire from the DC current source to the

indicator.

3. Trimmer adjusting tool.

STEP 1. Disconnect power from the unit and remove the front

panel lens.

STEP 2. Connect the DC current source to terminal 1 (+) and

terminal 2 (-) located on the rear of the unit. Reconnect power and turn the unit on. Allow for a 5-minute warm-up.

STEP 3. Input 4.0mA from the DC current source and adjust the

ZERO pot for a display reading of 0.0 ± 1 count.

STEP 4. Input 20.0 mA from the DC current voltage source and

adjust the SPAN pot for a reading of 100.0±1 count.

STEP 5. Repeat steps 3 and 4 until no further adjustment is

needed.

Page 25

0 to 20mA

Equipment Required:

1. Precision DC current source with a resolution of 0.1mA DC

and an accuracy of 0.1%.

2. Interconnecting copper wire from the DC current source to the

indicator.

3. Trimmer adjusting tool.

STEP 1. Disconnect power from the unit and remove the front

panel lens.

STEP 2. Connect the DC current source to terminal 1 (+) and

terminal 2 (-) located on the rear of the unit. Reconnect power and turn the unit on. Allow for a 5-minute warm-up.

STEP 3. Input 0.0mA from the DC current source and adjust the

ZERO pot for a display reading of 0.0 ± 1 count.

STEP 4. Input 20.0 mA from the DC current source and adjust

the SPAN pot for a reading of 100.0±1 count.

STEP 5. Repeat steps 3 and 4 until no further adjustment is

needed.

Page 26

1 to 5VDC

Equipment Required:

1. Precision DC voltage source with a resolution of 0.1mV DC

and an accuracy of 0.1%.

2. Interconnecting copper wire from the DC voltage source to the

indicator.

3. Trimmer adjusting tool.

STEP 1. Disconnect power from the unit and remove the front

panel lens.

STEP 2. Connect the DC voltage source to terminal 3 (+) and

terminal 2 (-) located on the rear of the unit. Reconnect power and turn the unit on. Allow for a 5-minute warm-up.

STEP 3. Input 1.0VDC from the DC voltage source and adjust

the ZERO pot for a display reading of 0.0 ± 1 count.

STEP 4. Input 5.0VDC from the DC voltage source and adjust

the SPAN pot for a reading of 100.0±1 count.

STEP 5. Repeat steps 3 and 4 until no further adjustment is

needed.

Page 27

0 to 5VDC and 0 to 10VDC

Equipment Required:

1. Precision DC voltage source with a resolution of 0.1mV DC

and an accuracy of 0.1%.

2. Interconnecting copper wire from the DC voltage source to the

indicator.

3. Trimmer adjusting tool.

STEP 1. Disconnect power from the unit and remove the front

panel lens.

STEP 2. Connect the DC voltage source to terminal 3 (+) and

terminal 2 (-) located on the rear of the unit. Reconnect power and turn the unit on. Allow for a 5-minute warm-up.

STEP 3. Input 0.0VDC from the DC voltage source and adjust

the Zero pot for a display reading of 0.0 ± 1 count.

STEP 4. Input 5.0VDC from the DC voltage source and adjust

the Span pot for a reading of 100.0±1 count.

STEP 5. Repeat steps 3 and 4 until no further adjustment is

needed.

Page 28

DP450-HACC High AC Current

Equipment Required:

1. Precision AC current source with a resolution of 0.1mA AC

and an accuracy of 0.1%.

2. Interconnecting copper wire from the AC voltage source to the

indicator.

3. Trimmer adjusting tool.

STEP 1. Disconnect power from the unit and remove the front

panel lens. Carefully remove the electronics from the housing by lifting the display above and over the latch located at the bottom front of the housing and slide the assembly out of the case.

STEP 2. Make note of the jumper settings on JP501. Carefully

remove them and replace jumpers on position 3 and position 10.

STEP 3. Connect the AC current source to terminals 5 and 6

located on the rear of the unit. Reconnect power and turn the unit on. Allow for a 5-minute warm-up.

STEP 4. Input 0.0 amp from the AC current source and adjust

the ZERO pot for a display reading of 0 counts ±1 count.

STEP 5. Input 1 amp @ 60 Hz from the AC current source and

adjust the SPAN pot for a display reading of 1000 counts ±1 count.

STEP 6. Remove the jumper on positions 3 and 10 and replace

all of the jumpers to their original settings.

Page 29

DP450-HDCC High DC Current

Equipment Required:

1. Precision DC current source with a resolution of 0.1mV DC

and an accuracy of 0.1%.

2. Interconnecting copper wire from the DC current source to the

indicator.

3. Trimmer adjusting tool.

STEP 1. Disconnect power and current from the unit and remove

the front panel lens. Remove the electronics from the housing by lifting the display above and over the latch located at the bottom front of the housing and slide the assembly out of the case.

STEP 2. Make note of the jumper settings on JP501. Carefully

remove them and replace one jumper on position 7.

STEP 3. Connect the DC voltage source to terminals 4 (+) and

5(-) located on the rear of the unit. Reconnect power and turn the unit on. Allow for a 5-minute warm-up.

STEP 4. Input 0.0mV from the DC voltage source and adjust the

ZERO pot for a display reading of 0-counts±1 count.

STEP 5. Input 90.0mV from the DC voltage source and adjust

the SPAN pot for a display reading of 1800 counts±1 count.

STEP 6. Remove the jumper on position 7 and replace all of the

jumpers to their original settings. Calibration is complete.