Define Instruments Merlin Operating Manual

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› Universal input › 22V excitation › Smart, simple, USB powered setup › Optional relay outputs › Optional isolated analog output › Designed for harsh environments › Large 0.8" super-bright display

› Flexible 32 point linearization table

General Description

The Merlin universal digital indicator accepts analog inputs from a range of industrial sensors, including: process, temperature, ow, frequency, and voltage from 200mV to 300V. It features a wide range power supply that suits both AC mains and 24V DC applications, and supplies the excitation required for common sensors and transmitters.

The Merlin can be scaled into any engineering unit, and the result displayed on the large 0.8" 4 digit super-bright LED display. Auto ranging is available to increase the dynamic range of viewable data.

The Merlin R2A adds two Form A 3 Amp relays for a variety of control and alarm functions, and a 4-20mA active output for retransmission to PLCs and SCADA systems.

Merlin

Universal Indicator

The unit boasts a 1 minute setup time using the Dene Toolbox conguration soware. All functions are explained expertly in the dynamic sidebar help - perfect for the novice starting out who can use it to learn about industrial applications, or the expert who wants to save commissioning time.

The Merlin has been designed for harsh industrial environments. With an IP65 sealed bezel and extensive testing of noise eects to and beyond CE requirements, the meter provides a tough and reliable application solution.

Quick start

Hardware Install (p6)

Soware Install (p7)

Soware Setup (p9)

Wiring (p12)

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CONTENTS

Contents ................................................. 2

Order Codes ............................................ 2

Safety Notices ......................................... 3

Symbol Denitions ................................. 3

1 - Specications .................................... 3

1.1 - General Meter Specications .... 3

1.2 - Display ....................................... 5

1.3 - Case Dimensions ....................... 5

2 - Hardware Installation ...................... 6

2.1 - Installation Instructions ............ 6

2.2 - Installation Environment .......... 6

3 - Soware Installation ....................... 7

4 - Soware Conguration ................... 9

Using ToolBox

4.1 - Bridge Key ................................. 9

4.2 - Using ToolBox ......................... 10

4.3 - ToolBox Interface Overview ..... 11

5 - Wiring ............................................. 12

5.1 - Wiring Overview ..................... 12

5.2 - EMC Installation Guidelines .... 12

5.3 - Back Panel ............................... 13

5.4 - Power Supply .......................... 13

5.5 - Sensor Input ............................ 14

5.6 - Analog Output ........................ 14

5.7 - Relay Outputs .......................... 14

5.8 - User Input ............................... 14

6 - Input Types ..................................... 15

6.1 - Thermocouple Input ............... 15

6.2 - RTD Input ................................ 16

6.3 - NTC Input ................................ 17

6.4 - Current Input .......................... 18

6.5 - Voltage Input .......................... 19

6.6 - Digital Pulse ............................. 21

6.7 - Potentiometer Input ............... 22

6.8 - AC Current Sensor ................... 23

7 - Maintenance & Service .................. 24

7.1 - Calibration ............................... 24

7.2 - Troubleshooting ...................... 24

7.3 - Service ..................................... 25

A - Appendix A - EMC Test Results ...... 25

B - Appendix B - Warranty & ............... 27

User's Responsibility

ORDER CODES

MER – UV – R2A

Merlin Universal

Voltage

Merlin MER Universal Indicator

Universal Voltage UV 24–250V AC / 19.5–250V DC

Output R2A 2 x relay outputs, 1 x analog output (4–20mA)

Output (Optional)

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SAFETY NOTICES

For your safety and the prevention of damage to the Merlin unit and other equipment connected to it, please read complete instructions prior to installation and

operation of the Merlin, and carefully observe all safety regulations and instructions. Consult this manual carefully in all cases where hazard symbols are marked on your Merlin unit.

Use of this instrument in a manner not specied by the manufacturer may compromize the protection provided by the instrument. This instrument should not be used to directly drive valves, motors, or other actuators, unless equipped with appropriate safeguards.

It is the responsibility of the user to indentify potential hazards that may arise in the event of a fault to unit, and implement safeguards for the prevention of harm to persons or equipment. The safety of any system incorporating this unit is the responsibility of the assembler of the system.

Symbol denitions

CAUTION

Risk of electric shock

Please refer to user manual.

CAUTION

Risk of danger

Please refer to user manual.

SPECIFICATIONS

1.1 - General meter specications

Power

Power supply 24–250V AC / 19.5–250V DC, 47–63Hz, 6VA max

Isolation 2,300Vrms for 1min to all inputs and outputs

Both direct and alternating current.

Equipment protected throughout by DOUBLE INSULATION or REINFORCED INSULATION.

Analog input

Input Universal (see Section 6 for full input specications and wiring)

Excitation power

Excitation 22V ±10% (25mA max)

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Relay output

Typ e 2x Form A relays

Isolation to sensor and user input commons 2,300Vrms for 1min

Working voltage 240Vrms

Contact rating

One Relay energized: 3amps @ 120/240V AC or 28V DC (resistive load) 3amps max total current with both relays energized

Life expectancy 100K cycles min at full load rating

User input

One user input is available on R2A model only. It can be programmed for manual relay reset, latching or zero functions

Max continuous input 20V DC

Isolation to sensor input common

Not isolated

Analog output

Typ e 1x 4–20mA or 20–4mA DC

Isolation to sensor and user input commons 1,400Vrms for 1min

Working voltage 125V

Max output drive 20mA (600Ω max load at 12V DC)

Accuracy/repeatability 0.05% of FSO

Resolution 1μA

Temperature dri 30ppm/°C typical

Powered Self-powered (active)

OPTIONAL

Environmental conditions

Operating humidity 5–85%RH max (non-condensing)

Operating temperature 14 to 122°F (-10 to 50°C)

Storage temperature -4 to 140°F (-20 to 60°C)

Altitude Up to 6561 (2,000m)

Certications & compliances

EN 61326-1 Immunity to Industrial Locations

Emission CISPR 11 Class A (EN 61326)

Safety requirements for electrical equipment for measurement control, and laboratory use:

EN 61010-1 General Requirements EN 61010-2-030 Particular Requirements

for Testing and Measuring Circuits

UL Listed File Number E473114

IP65 Enclosure rating (face only)

Construction

Panel mount enclosure Rated for IP65 indoor use. Installation Category II, Pollution Degree 2. Flame resistant. Panel gasket and mounting clips included.

Dimensions

1.89 x 3.74 x 2.44" (48 x 95 x 62 mm)

Cutout area 1.77 x 3.62" ±.02 (45 x 92mm ±.5)

Space behind panel 3.15" (80mm) minimum

space required behind panel (includes space for connectors/wiring)

Weight 6.87oz (195g)

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1.2 - Display

Digits 4 digit red LED, 0.8" (20mm), 7-segment characters

Display range -1999 to 9999

Annunciators 2x setpoint indicator

LEDs (R2A model only)

IP65 sealed front bezel

1.3 - Case dimensions

91mm (3.58")

95mm (3.74")

107mm (4.21")

48 mm

(1.89")

44 mm

(1.73")

62mm (2.44")

4mm (0.16")

80mm (3.15") minimum

depth required behind panel

22mm

(0.87")

Connectors & wiring

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Panel Bezel

Gasket

Panel Cutout

HARDWARE INSTALLATION

2.1 - Installation instructions

The Merlin is designed to be mounted into an enclosed panel, and meets IP65 requirements when properly installed.

A Prepare the Panel Cutout to 92x45mm

±.5 (3.62x1.77" ±.02) as shown below.

B Remove the Mounting Clips from the

Merlin unit.

C Slide the Panel Gasket over the rear of

the unit to the back of the Bezel.

Panel

Mounting

Clips

D From the front of the panel, insert the

Merlin into the Panel Cutout. Holding the unit in place, engage the Mounting Clips so that the tabs snap into place over the notches on the case.

E To achieve a proper seal, tighten the

Screws evenly until the unit sits rmly

against the panel (torque to approximately 70N-cm [6.2 in-lbs]). Do not overtighten the screws.

92mm ±.5

(3.62″ ±.02)

45mm ±.5

(1.77″ ±.02)

Screws

2.2 - Installation environment

The Merlin should be installed in a location that does not exceed the maximum operating temperature, and at a safe distance from other devices that generate excessive heat. The installation environment should provide good air circulation to the unit.

The bezel, plastic casing and product label may be cleaned, if required, using a so, damp cloth and neutral soap product.

Continuous exposure to direct sunlight should be avoided, as this may accelerate the aging process of the bezel.

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ToolBox oers a smart, no-fuss setup experience for your Merlin universal indicator. It features USB powered programming (no power supply required!) and has been designed to simplify and speed up conguration.

You must install ToolBox before connecting the Merlin to your computer. If you have already connected the meter using the Bridge Key, please disconnect it before continuing.

A Download the latest version of ToolBox from

www.deneinstruments.com/toolbox

For ease of access, we recommend saving the install le on your desktop. If you can't nd the install le, check whether your browser has saved it in your 'Downloads' folder.

B Extract the install le from the zip folder. Right-click on the zip folder and choose 'Extract

All', (or extract the le using another extraction utility of your choice).

SOFTWARE INSTALLATION

Fig 1

C Double-click on the extracted .msi install

le. This will launch the ToolBox installer.

Depending on your security settings, a 'Security Warning' dialog may appear. If you see the security message, click 'Run'.

Fig 2

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D The ToolBox setup wizard will

launch (Fig 3).

Click 'Next' to get started.

E The wizard will also ask for

conrmation that you wish to begin the installation.

Click 'Next' to continue.

F Next the wizard will prompt

you to select an installation folder (Fig 4). You may accept the default installation folder, or select an alternative location by clicking 'Browse'.

Click 'Next' to continue.

G The install wizard will now in-

stall ToolBox, and a progress bar will appear. Please wait. This process usually takes 2-3 minutes.

If you are using Windows with 'User Account Control' enabled, you may be asked for permission to continue the installation (Fig 5). Click 'Yes'.

(Note that this dialogue may cause a slight delay to the installation process.)

H When ToolBox has nished in-

stalling, 'Installation Complete' will appear (Fig 6). Click 'Close'.

The installer will place an icon on your desktop for easy access to ToolBox.

The downloaded .zip and .msi installer les are no longer needed, and may be deleted.

Fig 3

Fig 4

Fig 5

Fig 6

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SOFTWARE CONFIGURATION USING TOOLBOX

4.1 - Bridge Key

Install the ToolBox soware (see Section 3) before connecting the Merlin to your PC.

Then connect the Merlin to your computer's USB port using the Bridge Key (supplied separately), as shown below. The interface cable connects to the USB programming jack on the unit's back panel (see 5.3D). A USB extension cable is supplied for your use if required - this is oen used for convenience in accessing USB ports located at the back of the computer.

Merlin Universal Indicator

Interface Cable

USB Bridge Key

USB Extension Cable

(If Necessary)

PC Connection

INSTALL SOFTWARE FIRST!

CAUTION

Risk of damage to equipment or PC

Ensure that all connections between the Bridge Key and your Merlin are secure. Connecting your indicator with cables that are not rmly 'pushed in' will result in connection faults, and in extreme cases could cause damage to your computer.

Do not uplug the Bridge Key or any connecting cables while ToolBox is busy applying changes to the Merlin. This may cause loss of settings, or unexpected unit behaviour.

CAUTION

Not UL approved

The Bridge Key is sold separately to the Merlin and has not been certied for UL.

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Merlin universal indicator. To set up your indicator, only the Bridge Key is required - you do

not need to supply power.

ToolBox features a comprehensive help panel that will guide you through the setup of your Merlin universal indicator. Helpful hints and explanations will appear when you adjust a setting using the ToolBox controls.

There are three main navigation pages/tabs:

› Input/Output: Input mode/range, Scaling/offset, Display, Retransmission scaling › Setpoints: Alarm control/mode, Setpoint activation points, advanced modes › Advanced: Load/save configuration, Create configuration certificate

A Double-click the ToolBox icon on your desktop to launch the ToolBox program.

B With the Merlin connected to your computer's USB port (see 4.1), click the green

'Connect' button. This will scan your computer's Com ports and automatically connect to your device.

Connection problems?

ToolBox will auto-detect and connect to the Merlin when you click the 'Connect' button. If you have problems establishing a connection, please check the following:

› Ensure that all connections between the device and your computer are secure. The main

interface cable must be fully inserted into both the USB programmer and the Merlin's programming port. Press firmly.

› Try disconnecting and reconnecting the Merlin USB, or using a different USB port on

your computer.

› Disconnect any additional compatible devices. The software auto-detect feature does

not work if multiple Merlins are connected simultaneously.

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4.3 - ToolBox interface overview

Main Navigation Tabs

Input/Output, Setpoints, and Advanced conguration pages. (ToolBox will detect your meter outputs and will only display relevant tabs.)

Control Area

Main control area for conguring your meter. Any changes made in this area will bring up the Apply Bar (see below)

Connection Panel

Disconnect button Connection status Live display

Apply Bar

Appears if you have made any changes in the Control Area. ToolBox will not allow you to browse to a new tab in the Main Navigation with unapplied changes to your conguration.

Help Panel

Diagrams, explanations, and helpful tips will automatically appear in this panel as you congure your meter.

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WIRING

5.1 - Wiring overview

Electrical connections are made via plug in terminal blocks at the rear of the meter. All conductors must conform to the meter's voltage and current ratings, and be suitably rated for the expected temperature range to be incurred.

When wiring the meter, check all connections by comparing the terminal numbers shown on the meter label against the appropriate wiring diagrams in this manual (5.3–5.8 and Section 6), or in the Dene ToolBox soware. Strip the wire, leaving around 0.25" (6mm) of bare lead exposed. If you are using stranded wire, this should

5.2 - EMC installation guidelines

The Merlin has been designed to cope with large EMC disturbances. This has been

achieved by continual testing and improvement of ltering and layout techniques over many years.

The Merlin not only meets CE noise requirements, but surpasses them in many tests. (For full details and test results, please see Appendix A.)

However in some applications with less than optimum installations and large power switching, the EMC performance of the Merlin can be further improved, by:

A Installing the Merlin in an earthed metal

enclosure. This is particularly useful if the control box is mounted close to large power switching devices like contactors. Every switching cycle there is a possibility of generating a large amount

be tinned with solder. Insert the lead into the correct plug in the correct position, and tighten until the wire is secure. Verify tightness by pulling on the wire.

Follow all local codes and regulations when wiring and installing the meter. Each terminal is rated to accept one wire from #14 AWG (2.5mm) to #20 AWG. However it is also possible to accept two #18 AWG wires, or up to four #20 AWG wires.

CAUTION

All eld wiring must rated at a minimum of 158°F (70°C).

of near eld radiated noise. The metal enclosure acting as a faraday cage will shunt this radiation to ground and away from the Merlin. Further improvements can be made with this type of noise by increasing the physical distance from the power devices. For example, increasing the control box distance from 6" to 12" from the noise source will reduce the noise seen by the control box by a factor of 4. Probably the cheapest and best results in this situation could be obtained by adding RC snubbers to the contactors or power switches.

B Using shielded cable on sensitive input

and control signal lines. Good results can be obtained by grounding the shields to the metal enclosure close to the entry point. All cables act as aerials and pick up unwanted R.F. radiated signals and

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noise; the earthed shield acts as a faraday cage around the cables, shunting the unwanted energy to ground. Shields can also help with capacitively coupled noise typically found in circumstances when signal cable is laid on top of noisy switching power cables. Of course in this case you are better o to keep separate signal and power lines.

C Laying cable on earthed cable trays

can also help reduce noise seen by the

D The relay outputs of the Merlin have

5.3 - Back panel

The back panel of the Merlin may have up to 5 screw terminals (A–F) and 1 USB programming jack (D). Ports C–F are installed on the R2A model only.

meter. This is particularly useful if there are long cable runs, or the unit is close to radiating sources such as two way radios.

built in MOVs to help reduce EMI when switching inductive loads. EMI can further be reduced at the load by adding snubbers for AC signals or a yback diode for DC coils.

A Sensor input (Pins 1–6, Section 6)

B Power supply (Pins 7–8, See 5.4)

C Analog output (Pins 9–10, See 5.6)

D USB programming jack

(See Section 4)

E User input

(Pins 11–12, See 5.8)

F Relay outputs

(Pins 13–16, See 5.7)

5.4 - Power supply

See 5.3B, pins 7–8

The Merlin features a wide range Power Supply that suits both AC mains and 24V DC applications. The Merlin uses a full bridge rectier, so

it is not sensitive to polarity for DC power inputs.

CAUTION

Risk of electric shock.

AC power supplied to the meter must be protected by a UL approved 10A circuit breaker. DC power supplied to the meter must be protected by a UL approved 1A, 250V fuse.

POWER

24–250V

–

250V

19.5 DC

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5.5 - Sensor input See 5.3A, pins 1–6

The Sensor Input terminal can be wired to suit numerous input types. See Section 6 for input wiring, or refer to the ToolBox help panel as you are conguring the unit.

5.6 - Analog output (If installed)

See 5.3C, pins 9–10

If your model includes Analog Output, wire it as shown (right).

The analog output can be scaled to suit your application using the ToolBox soware.

5.7 - Relay outputs (If installed)

See 5.3F, pins 13–16

If your model includes Relay Outputs, wire them as shown (right). The setpoints can be congured using ToolBox for a variety of alarm or control functions.

5.8 - User input (If installed)

See 5.3E, pins 11–12

If your model includes Relay Outputs, then a User Input is also provided. This can be connected to a switch as shown, to perform manual relay reset, latching or zero functions. These options are fully congurable using the ToolBox soware.

ANALOG

OUTPUT 4–20mA

SETPOINTS

SP 2SP 1

USER

INPUT

U 1

Com

CAUTION

The User Input common is NOT isolated from the Sensor Input.

In order to preserve the safety of the meter application, the User Input common must be suitably isolated from hazardous live earth referenced voltages; or the User Input common must be at protective earth ground potential. If not, hazardous live voltage may be present on the User Input and the User Input common terminals. Appropriate considerations must then be given to the potential of the User Input common with respect to earth common.

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INPUT TYPES

CAUTION

Risk of electric shock. Dangerous and lethal voltages may be present on the terminals of

the meter. Please take appropriate precautions to ensure safety.

CAUTION

Risk of danger. The sensor input can potentially oat to dangerous and unexpected volt-

ages depending on what external circuit it is connected to. Appropriate considerations must be given to the potential of the sensor input with respect to earth common.

6.1 - Thermocouple input

Thermocouple types

B, E, J, K, N, R, S, T

Input impedance 1MΩ min

TC lead resistance 100Ω max

Cold junction comp. -10 to 70°C

Accuracy E, J, K, N, T: < ±1°C.

B, R, S: < ±2°C.

Temperature (thermocouple)

The thermocouple is one of the most common temperature sensors used in industry. It relies on the Seebeck coecient between dissimilar metals.

The thermocouple type is selected with reference to the application temperature range and environment. The most common thermocouple types for general purpose applications are J and K type.

Temperature dri

E, J, K, N, T: < ±0.05°C/C. B, R, S: < ±0.2°C/C.

Sensor break output drive

Function high upscale/low downscale

CJC error < ±1°C

Response time 400msec

Supported thermocouple types/ranges

K -200°C (-328°F) 1372°C (2502°F)

B 400°C (752°F) 1800°C (3272°F)

E -200°C (-328°F) 800°C (1472°F)

J -200°C (-328°F) 1000°C (1832°F)

R -50°C (-58°F) 1760°C (3200°F)

S -50°C (-58°F) 1760°C (3200°F)

T -200°C (-328°F) 400°C (752°F)

N -200°C (-328°F) 1300°C (2372°F)

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6.2 - RTD input

RTD input Pt100 or Pt1000 DIN 3-wire type (2-wire can be used with oset trim)

Pt100 lead wire resistance 50Ω/wire max.

0.02% FSO oset error per Ω of lead resistance mismatch

Pt1000 lead wire resistance 20Ω/wire max. 0.002% FSO oset error per Ω of lead resistance mismatch

Temperature (RTD)

The RTD (standing for Resistance Temperature Device) is highly stable and accurate, and is fast becoming the most popular temperature sensor in industry.

Oen referred to as Pt100 and Pt1000, the Pt represents platinum (the dominant metal in its construction), and 100/ 1000 is the resistance in ohms at 0°C.

Supported RTD types/ranges

Pt100 -200°C (-328°F) 320°C (608°F)

Pt1000 -200°C (-328°F) 320°C (608°F)

Sensor current 0.3mA nominal

Sensor break output drive

Function high upscale/low downscale

Accuracy Better than 0.2°C

Temperature dri <0.007°C/C

Response time 400msec

RTD 3 Wire PT100/1000

Link

RTD 2 Wire PT100/1000

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6.3 - NTC input

NTC -50 to 125°C (various thermistors)

Sensor types 10K Beta 3984/3435

Response time 100msec

Temperature (NTC)

NTC (Negative Temperature Coecient), is a particular type of thermistor.

NTC's are popular in the HVAC industry due to their low cost, but have a limited temperature range which makes them less popular in general industry.

The biggest issue with their general acceptance is that there is no standard that covers inter operability between different thermistor manufacturers.

Accuracy Better than 0.4°C

Temperature dri <50ppm/°C

N.T.C 10,000Ω

Supported NTC types/ranges

10K Beta 3984 -55°C (-67°F) 125°C (257°F)

10K Beta 3435 -50°C (-58°F) 110°C (230°F)

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6.4 - Current input

Range 0/4–20.000mA

Excitation +22V DC, 25mA max

USB prog zero 0–±99% of span

Field prog span 1μA–24mA DC

Input resistance 10Ω

0/4–20mA DC

0/4–20mA DC is the most commonly used analog signal in industry, and is universally accepted. As a current loop, it is unaected by voltage drops in cables, and can be transmitted over long distances without signal degradation.

Current 0/4−20mA

Max over-range 50mA DC continuous

Linearity and repeatability

<±0.02% FSO typical

Temperature dri <50ppm/°C

Response time 100msec

0/4–20mA DC, 3 or 4 wire transmitter

The meter can provide up to 25mA to power an external 3 or 4 wire transmitter, and at the same time measure the signal.

3 Wire Transmitter 0/4−20mA

+ Signal 0/4-20mA

Supply +22V DC 25mA max

4–20mA DC, loop powered transmitter

The meter can provide power to a loop powered transmitter, and at the same time measure the signal. This conguration is ideal for when there is a long distance between the sensor and the meter.

4 Wire Transmitter 0/4−20mA

+ Signal 0/4-20mA

Supply +22V DC 25mA max

2 Wire 4−20mA Loop Powered Transmitter

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6.5 - Voltage input

Ranges ±200mV, –200mV to 1V, 0–10V,

–

±10V,

10 to 30V, 0–300V

USB prog zero 0–±99% of span

USB prog span 95% of FSO

Input resistance 1MΩ min

±200mV DC

For low signal applications the meter supports a ±200mV DC range. Typical applications include measuring large DC currents using external current shunts.

±200mV DC

-200mV to 1V DC

A -200mV to 1V range is provided for interfacing to sensors and other electronic apparatus that provide this output.

Linearity and repeatability

<±0.02% FSO typical (0–10V= <±0.05%; 0–300V= <±0.1%)

Temperature dri <50ppm/°C

Response time 100msec

0–10V DC

0–10V DC is a common process signal generated by transmitters, meters and PLCs.

It would normally be scaled into engineering units by the meter.

0−10V DC

±10V DC

±10V DC is a common process signal generated by transmitters, meters and PLCs. It would normally be scaled into engineering units by the meter.

−200mV to 1V DC

±10V DC

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-10 to 30V DC

This is a general purpose voltage measuring range, typically used to measure battery voltages, power supply outputs etc.

−10 to 30V DC

0–300V DC

This higher voltage general purpose range is typically used to measure battery voltages, power supply outputs, etc.

0−300V DC

CAUTION

Risk of electric shock

Exercise extreme caution when handling high voltage inputs.

CAUTION

Rated voltage between pins 5 & 6 and earth is 300V DC max.

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6.6 - Digital pulse

Frequency range 0–2000.0Hz

Sensors Open collector NPN (2 and 3

wire)/PNP (2 wire only)

Excitation +22V DC, 25mA max

Response time 100msec

General frequency mode

General Frequency mode allows an NPN or PNP input (up to 2KHz) to be measured and scaled to any engineering unit.

The meter can also provide up to 25mA to power an external device.

Flow rate mode

Flow Rate mode enables an input from an NPN or PNP paddle type ow meter to be converted to a ow rate. The input signal (up to 2KHz) is converted into a ow rate by programming the unit with the sensor manufacturer's K-factor value.

The meter can also provide up to 25mA to power a 3 wire NPN paddle type ow sensor.

Soware modes General frequency, Flow rate (pulse), or RPM (pulse)

Linearity and repeatability 0.05%

Temperature dri <50ppm/°C

NPN open collector output

N.P.N Open Collector Output

+22V DC, 25mA max

N.P.N Open Collector Output

With Excitation

RPM mode

ToolBox RPM mode enables an input from an NPN or PNP proximity sensor to be converted to an RPM (Revs Per Minute) value. The input signal (up to 2KHz) is converted into RPM by programming the unit with the pulses per revolution value.

The meter can also provide up to 25mA to power a 3 wire NPN proximity sensor.

PNP open collector output

P.N.P Open Collector Output

NB: DOES NOT SUPPORT PNP 3 WIRE!

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6.7 - Potentiometer input

Potentiometer input 3-wire

Excitation voltage Variable

Potentiometer resistance <1kΩ low pot;

1–4kΩ med pot; 4–20kΩ high pot

Field prog zero 0–90% of span

3 wire potentiometer

A 3 wire potentiometer is typically used to measure position. The low, medium or high potentiometer range can be programmed to your unit using the ToolBox soware.

These ranges must be calibrated using the two point calibration method.

Potentiometer Low (<1kΩ)

Field prog span 0.1–100%

Linearity and repeatability

<±0.05% FSO typical

Response time 100msec

Temperature dri <50ppm/°C

Potentiometer Med (1−4kΩ)

Potentiometer High (4−20kΩ)

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6.8 - AC current sensor

Jump Range

Sensor type Current transformer (Dene Instruments ACCS-420/010)

Amperage range Header selectable 100/150/200A; Overload 175/300/400A respectively (continuous)

Output (Representing 0–100% of full scale input range) ACCS-420 = 4–20mA DC loop powered ACCS-010 = 0–10V DC

AC current sensors

The meter accepts input from a Dene Instruments AC current sensor. Set the jumper on the top of the current sensor to the desired current range, as shown (right).

AC Current Sensor 4−20mA Powered by the Merlin

Power supply

ACCS-420 = Loop powered, 15–36V DC ACCS-010 = Self powered

Accuracy 1% of full scale

Response time 250ms (10–90%)

Isolation voltage 2,000V

Frequency 50–60Hz

0–100A 0–150A 0–200A

AC Current Sensor 0−10V Signal powered

Page 24

MAINTENANCE & SERVICE

7.1 - Calibration

The meter has been fully calibrated at the factory, and can be recalibrated in soware using Dene ToolBox (see Section 4). Scaling to convert the input signal to a desired display value is also done using ToolBox.

If the meter appears to be indicating incorrectly or inaccurately, refer to troubleshooting before attempting to calibrate the meter. When recalibration is required (generally every 2 years), it should only be performed by qualied technicians using appropriate equipment.

Calibration does not change any user programmed parameters. However, it may aect the accuracy of the input signal values previously stored.

7.2 - Troubleshooting

Problem Resolution

No display Check power connections.

Internal Comms Error

c.err

Er.CL

ER.Fl

er.01 to10

Sens

over

undr

Try re-starting unit. If the problem is intermittent, this error could be caused by an EMC issue. Please refer to 5.2 for potential remedies.

Analog Output Calibration Error

Factory calibration of analog output is corrupt or missing. Return unit to factory for re-calibration.

Display Flash Error

Settings such as decimal point, scaling, and brightness will be lost. Reconnect to Dene ToolBox (see Section 4) and set up the meter again.

Analog Input Error

Error type indicated by a numerical error code (01–10). Please return to factory for repair.

Sensor Error

Sensor is missing or faulty. Check your sensor wiring.

A/D Overow

Check your sensor wiring. If the sensor wiring is correct, check the signal level.

A/D Underow

Check your sensor wiring. If the sensor wiring is correct, check the signal level.

For further assistance, please contact technical support using the contact details listed at the end of this document.

Page 25

7.3 - Service

Please return this product to the manufacturer if servicing is required.

THE MERLIN HAS NO USER SERVICEABLE PARTS.

For further assistance, please contact technical support using the contact details listed at the end of this document.

APPENDIX A - EMC TEST RESULTS

The Merlin has been designed to cope with large EMC disturbances. This has been achieved by constantly testing and improving ltering and layout techniques over many years. The Merlin oers superior R.F. ltering on all inputs, outputs and power supplies, when compared to most competing products.

The Merlin not only meets CE noise requirements, but surpasses them in many tests. Furthermore, all testing was performed in plastic enclosures without shielded cabling.

Immunity - Enclosure Ports

Phenomenon Basic Standard Test Value Performance Criteria

EM Field IEC 61000-4-3 10Vm (80Mhz to 1GHz)

Electrostatic Discharge (ESD)

IEC 61000-4-2 4KV/8KV contact/air Meets Criterion A (Note 1)

3V/m (1.4GHz to 2.7Ghz)

Meets Criterion A

Meets NAMUR NE 21 recommendation

Immunity - Signal Ports

Phenomenon Basic Standard Test Value Performance Criteria

Conducted RF IEC 61000-4-6 3V(150Khz to 80Mhz) Meets Criterion A

Burst IEC 61000-4-4 1KV (5/50ns,5Khz)

1KV(5/50ns,100Khz)

Surge IEC 61000-4-5 1KV L-E Meets Criterion A (Note 1)

Meets Criterion A (Note 1) Meets NAMUR NE 21 recommendation

Immunity - AC power

Phenomenon Basic Standard Test Value Performance Criteria

Conducted RF IEC 61000-4-6 3V (150Khz to 80Mhz) Meets Criterion A

Burst IEC 61000-4-4 2KV (5/50ns, 5Khz) L-N

1KV (5/50ns, 5Khz) L-L

Surge IEC 61000-4-5 2KV L-E

1KV L-L

Meets Criterion A (Note 1) Meets Criterion A (Note 1)

Page 26

Voltage Dips IEC 61000-4-11 0% during 1 cycle

40% during 10/12 cycles 70% during 25/30 cycles

Meets Criterion A (Note 1) Meets Criterion A (Note 1) Meets Criterion A (Note 1)

Note 1: Where indicated by Note 1, EN61326-1 calls for a Criterion B pass; unit exceeds this by meeting Criterion A.

Performance Criteria

Performance Criterion A

During testing, normal performance within the specication limits.

Performance Criterion B

During testing, temporary degradation, or loss of performance or function which is self-recovering.

Note: Stated performance by the manufacturer will have an additional error of less than 0.2% of full scale range due to EMC inuence.

Page 27

APPENDIX B - WARRANTY & USER'S RESPONSIBILITY

Warranty

Dene Instruments warrants that its products are free from defects in material and workmanship under normal use and service for a period of one year from date of shipment.

Dene Instruments’s obligations under this warranty are limited to replacement or repair, at its option, at its factory, of any of the products which shall, within the applicable period aer shipment, be returned to Dene Instruments’s facility, transportation charges pre-paid, and which are, aer examination, disclosed to the satisfaction of Dene Instruments to be thus defective.

User’s Responsibility

We are pleased to oer suggestions on the use of our various products, by way of printed matter, on our website, or through direct contact with our sales/application engineering sta.

However, since we have no control over the use of our products once they are shipped, NO WARRANTY, WHETHER OF MERCHANTABILITY, FITNESS FOR PURPOSE OR OTHERWISE is made beyond repair, replacement, or refund of purchase price at the sole discretion of Dene Instruments.

Users shall determine the suitability of the product for the intended application before using, and the users assume all risk and liability whatsoever in connection therewith, regardless of any of our suggestions or statements as to application or construction.

The warranty shall not apply to any equipment which shall have been repaired or altered, except by Dene Instruments, or which shall have been subjected to misuse, negligence or accident.

In no case shall Dene Instruments’s liability exceed the original purchase price. The aforementioned provisions do not extend the original warranty period of any product which has been either repaired or replaced by Dene Instruments.

In no event shall Dene Instruments’s liability, in law or otherwise, be in excess of the purchase price of the product.

Dene Instruments cannot assume responsibility for any circuitry described. No circuit patent or soware licenses are implied. Dene Instruments reserves the right to change circuitry, operating soware, specications, and prices without notice at any time.

Page 28

De ne Instruments

New Zealand

(Head O ce)

Auckland 0632, New Zealand

Auckland 0661, New Zealand

Ph Fax

www.de neinstruments.co.nz

10B Vega Place, Rosedale,

PO Box 245 Westpark Village,

: +64 (9) 835 1550

: +64 (9) 835 1250

sales@de neinstruments.co.nz

Merlin 1.05-0202 Revision Code: MER-MAN-15V04 Date Code: 151005

United States (Dallas, TX)

Ph: (214) 926 4950

sales@de neinstruments.com

www.de neinstruments.com

South Africa (Pretoria)

sales@de neinstruments.co.za

www.de neinstruments.co.za

Define Instruments Merlin Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual