Omega CL110 User manual

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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 [e-mail]
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: [phone] Fax: [phone]
e-mail: [email protected]
For Other Locations Visit omega.com/worldwide

1
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: [phone]
Fax: [phone]
www.omega.com
email: [e-mail]
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

2
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
DC
Double Insulated
Electric Shock
Fuse
PE Ground
Hot Surface (Burn Hazard)
Read the User’s Manual (Important Information)
Off
On
Canadian Standards Association

3
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.

4
•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.

5
2. Calibrator Interface and Operation
Precision Loop
Calibrator
100%
25%
0%
MENU
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
Menu
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.

6
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%
0%
MENU
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: ∧

7
•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%
0%
MENU
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:

8
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%
0%
MENU
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.