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User’s Guide

CL110

Precision Loop Calibrator

The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains, and reserves

the right to alter specifications without notice.

omega.com info@omega.com

Servicing North America:

U.S.A. Omega Engineering, Inc.

Headquarters: Toll-Free: 1-800-826-6342(USA & Canada only)

Customer Service: 1-800-622-2378 (USA & Canada only)

Engineering Service: 1-800-872-9436 (USA & Canada only)

Tel: (203) 359-1660 Fax: (203) 359-7700

e-mail: [email protected]

For Other Locations Visit omega.com/worldwide

Introduction

The OMEGA CL110 mA (loop) calibrator is designed to be simple to

use and to offer the highest accuracy of any loop calibrator in it’s

class.

The calibrator supports the following functions:

•Current measurement and sourcing, including selectable 24V

supply

•Voltage measurement

•Valvetest capability

•Selectable HART250Ωloop resistor

•Output step and ramp

The calibrator has the following features:

•Large easy to read display for measurements and data entry

•Digital knob with selectable decade control for quick and easy

data entry

•Interactive menus

•Input and output jacks protected by self resetting fuses

providing protection to 240VAC

1.1 Customer Service

OMEGA Engineering

Tel: (203) 359-1660

Fax: (203) 359-7900

www.omega.com

email: info@omega.com

1.2 Standard Equipment

Check to see if your calibrator is complete. It should include:

•Calibrator

•x6 AAAbatteries (installed)

•Test leads

- The CL110 is supplied with one set of leads with alligator

clips installed

•Owner’s Manual

•Certified Certificate

1.3 Safety information

Symbols Used

The following table lists the International Electrical Symbols. Some or

all of these symbols may be used on the instrument or in this

manual.

Symbol Description

AC (Alternating Current)

AC-DC

Battery

CE Complies with European Union Directives

Double Insulated

Electric Shock

Fuse

PE Ground

Hot Surface (Burn Hazard)

Read the User’s Manual (Important Information)

Off

Canadian Standards Association

The following definitions apply to the terms “Warning” and “Caution”.

•“Warning”identifiesconditionsandactionsthatmayposehazards

to the user.

•“Caution”identifiesconditionsandactionsthatmaydamagethe

instrument being used.

Usethecalibratoronlyasspecifiedinthismanual,otherwiseinjury

and damage to the calibrator may occur.

Warning

To avoid possible electric shock or personal injury:

•Donotapplymorethantheratedvoltage.Seespecificationsfor

supported ranges.

•Followallequipmentsafetyprocedures.

•Nevertouchtheprobetoavoltagesourcewhenthetestleadsare

plugged into the current terminals.

•Donotusethecalibratorifitisdamaged.Beforeyouusethe

calibrator, inspect the case. Look for cracks or missing plastic. Pay

particular attention to the insulation surrounding the connectors.

•Selecttheproperfunctionandrangeforyourmeasurement.

•Makesurethebatterycoverisclosedandlatchedbeforeyou

operate the calibrator.

•Removetestleadsfromthecalibratorbeforeyouopenthebattery

door.

•Inspectthetestleadsfordamagedinsulationorexposedmetal.

Check test leads continuity. Replace damaged test leads before

you use the calibrator.

•Whenusingtheprobes,keepyourfingersawayfromtheprobe

contacts. Keep your fingers behind the finger guards on the

probes.

•Connectthecommontestleadbeforeyouconnectthelivetest

lead. When you disconnect test leads, disconnect the live test lead

first.

•Donotusethecalibratorifitoperatesabnormally.Protectionmay

be impaired. When in doubt, have the calibrator serviced.

•Donotoperatethecalibratoraroundexplosivegas,vapor,ordust.

•Disconnecttestleadsbeforechangingtoanothermeasureor

source function.

•Whenservicingthecalibrator,useonlyspecifiedreplacementparts.

•Toavoidfalsereadings,whichcouldleadtopossibleelectricshock

orpersonalinjury,replacethebatteryassoonasthebattery

indicator appears.

•Toavoidaviolentreleaseofpressureinapressurizedsystem,shut

off the valve and slowly bleed off the pressure before you attach

the pressure module to the pressure line.

Caution

To avoid possible damage to calibrator or to equipment under test:

•Usetheproperjacks,function,andrangeforyourmeasurementor

sourcing application.

2. Calibrator Interface and Operation

Precision Loop

Calibrator

100%

25%

EXIT

Source 0.00%

4.000mA

Simultaneous % Display

4mA = 0.00%

20mA = 100.00%

Cursor

100% Key: Sets Output to 20mA

25% Key: Steps 4, 8, 12, 16, 20mA

0% Key: Sets Output to 4mA

Digital Knob Sets Output Value

Press to Move Cursor

Press to Enter Setup Menu

Press Again to Exit

Step / Ramp Enable

Backlight

On / Off

Mode

Figure 1

Figure 1 is typical of the main display for all operating modes. It

shows the present measurement or output value. The individual

operating modes are described below.

Use the MENU/EXIT key to display the main menu described in

section 3 to select the primary operating mode of the calibrator or to

access the calibrator setup functions.

In output mode:

 •Presstheknobtomovethedecadecursor.

 •Rotatetheknobtoincrementordecrementtheoutputinsteps

indicated by the selected decade.

 •Usethe3percentkeystodirectlysettheoutputtopreset

values.

 •Usethestep/rampkeytoselectandstoptheseadvanced

modes which are described in section 5.1.

2.1 Milliamp Source

In the mA Source mode the calibrator outputs a signal from 0 to

24mA into a load of up to 1000 ohms (750 ohms if the internal HART

resistor is switched on).

Figure 2 shows the main display and typical connections for this

mode.

Precision Loop

Calibrator

100%

25%

EXIT

Source 0.00%

4.000mA

4-20mA INPUT DEVICE

RECORDER/INDICATOR

SCADA SYSTEM ETC.

(+)

(–)

4 to 20mA

Figure 2

•Presstheknobtomovethedecadecursor.

•Rotatetheknobtoincrementordecrementtheoutputinsteps

indicated by the selected decade.

•Usethe3percentkeystodirectlysettheoutputtopresetvalues.

•Usethestep/rampkeytoselectandstoptheseadvancedmodes

which are described in section 5.1. When automatic step or ramp

is active one of the following is shown in the lower left corner:

Automatic step:

Automatic ramp: ∧

•PressMENU/EXITtoenterthemainmenudescribedinsection3.

•Thetext‘ValveTest’isshowninthelowercenterwhenthevalve

test function has been enabled on the Setup Menu, section 4.3.

Valvetestisdescribedinmoredetailinsection5.2.

•Thetext‘250Ω’ text is shown in the lower right corner when the

HART resistor has been enabled on the Setup Menu, section 4.4.

2.2 Milliamp Simulate

In the mA Simulate mode the calibrator functions like a 2-wire

transmitter by controlling the loop current from an external power

supply. This function is a great way to test a loop with the transmitter

removed.

Figure 3 shows the main display and typical connections for this

mode.

Precision Loop

Calibrator

100%

25%

EXIT

Simulate 0.00%

4.000mA

POWER SUPPLY

30 VDC MAX

(+)

(–)

4 to 20mA

4-20mA

INPUT DEVICE

(+)

(–)

Figure 3

•Presstheknobtomovethedecadecursor.

•Rotatetheknobtoincrementordecrementtheoutputinsteps

indicated by the selected decade.

•Usethe3percentkeystodirectlysettheoutputtopresetvalues.

•Usethestep/rampkeytoselectandstoptheseadvancedmodes

which are described in section 5.1. When automatic step or ramp

is active one of the following is shown in the lower left corner:

Automatic step:

Automatic ramp: ∧

•PressMENU/EXITtoenterthemainmenudescribedinsection3.

•Thetext‘ValveTest’isshowninthelowercenterwhenthevalve

test function has been enabled on the Setup Menu, section 4.3.

Valvetestisdescribedinmoredetailinsection5.2.

•Thetext‘250Ω’ text is shown in the lower right corner when the

HART resistor has been enabled on the Setup Menu, section 4.4.

2.3 Milliamp Measure without 24V power

In the mA Measure mode, the calibrator displays the loop current.

Figure 4 shows the main display and typical connections for this

mode.

Precision Loop

Calibrator

100%

25%

EXIT

Measure 0.00%

4.000mA

4-20mA

OUTPUT DEVICE

(+)

(–)

4 to 20mA

Figure 4

•PressMENU/EXITtoenterthemainmenudescribedinsection3.

•Thetext‘250Ω’ text is shown in the lower right corner when the

HART resistor has been enabled on the Setup Menu, section 4.4.

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