Omega CL309A-PLUS User guide

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User’s Guide

CL309A-PLUS

Automated Diagnostic

4-20 mA Calibrator

®

MADE IN

Shop online at

Servicing North America:

U.S.A.: Omega Engineering, Inc., One Omega Drive, P.O. Box 4047

ISO 9001 Certified

Stamford, CT 06907-0047
Toll-Free: 1-800-826-6342 Tel: [phone]
FAX: [phone] e-mail: [email protected]

Canada: 976 Bergar

Laval (Quebec), H7L 5A1 Canada
Toll-Free: 1-800-826-6342 TEL: [phone]
FAX: [phone] e-mail: [email protected]

For immediate technical or application assistance:

U.S.A. and Canada: Sales Service: 1-800-826-6342/1-800-TC-OMEGA

®

Customer Service: 1-800-622-2378/1-800-622-BEST

®

Engineering Service: 1-800-872-9436/1-800-USA-WHEN

®

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Servicing Europe:

Benelux: Managed by the United Kingdom Office

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FAX: [phone] e-mail: [email protected]

Czech Republic: Frystatska 184

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Toll-Free: 0800-1-66342 TEL: [phone]
FAX: [phone] e-mail: [email protected]

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Toll-Free: 0800 466 342 TEL: [phone]
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D-75392 Deckenpfronn, Germany
Toll-Free: 0800 6397678 TEL: [phone]
FAX: [phone] e-mail: [email protected]

United Kingdom: OMEGA Engineering Ltd.

ISO 9001 Certified

One Omega Drive, River Bend Technology Centre, Northbank
Irlam, Manchester M44 5BD United Kingdom
Toll-Free: 0800-488-488 TEL: [phone]
FAX: [phone] e-mail: [email protected]

OMEGAnet®Online Service Internet e-mail

omega.com [email protected]

It is the policy of OMEGA Engineering, Inc. to comply with all worldwide safety and EMC/EMI
regulations that apply. OMEGA is constantly pursuing certification of its products to the European New
Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification.

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.
WARNING: These products are not designed for use in, and should not be used for, human applications.

• EASY TO USE

CL309A-PLUS

CL309A-PLUS

Automated Diagnostic 4-20 mA Calibrator

Operating Instructions

With the CL309A-PLUS you can check, calibrate and measure all your current signal
instruments in a 4 to 20 milliamp DC loop. It can be used at any access point in your loop.
Source & Read 0.000 to 24.000 mA, Simulate a 2 Wire Transmitter or use the CL309A-PLUS to
simultaneously power your 2 Wire Transmitter and measure its output.

• EASY TO READ

Turn on the backlight to easily read the display in
dark areas of the plant.

• TROUBLESHOOT LOOP PROBLEMS

Quickly diagnose ground fault and current
leakage with the patented loop diagnostic
technology (US Patent# 7,248,058).

• SOURCE MILLIAMPS

Calibrate recorders, digital indicators, stroke
valves or any instruments that get their input
from a 4 to 20 mA loop. Easily set any value
quickly to within 0.001 mA with the adjustable
digital potentiometer “DIAL” or use preset 4.000
mA (0.00%) and 20.000 mA (100.00%)

• AUTOMATIC OUTPUT STEPPING & RAMPING

Press & hold the dial to automatically step from 4
to 20 in 2, 3 or 5 steps or choose a continuous
ramp.

• CALIBRATE USING LOOP POWER

Check loop wiring and receivers by using the
CL309A-PLUS in place of a 2 Wire transmitter.
The CL309A-PLUS uses any loop power from 2
to 60 V DC.

• READ LOOP CURRENT

Check controller outputs or measure the milliamp
signal anywhere in the loop. The CL309A-PLUS
measures 0.000 to 24.000 mA (-25.00 to 125.00%)
signals with greater accuracy than a typical
multimeter.

• POWER & MEASURE 2 WIRE TRANSMITTERS

The CL309A-PLUS can simultaneously output
process loop using the internal batteries and internal switching power supply, while measuring
the output of a 2 Wire Transmitter and any other loop devices. Powers HART™ transmitters with
built-in 250 ohm resistor simplifying hookups with HART communicators.

• READ DC VOLTS

The CL309A-PLUS can measure from -60.00 to +60.00 VDC with 10mV resolution. Use it to
check loop power supplies, I/V converters, 1 to 5 Volt signals, and other voltages making it
unnecessary to carry an additional multimeter.

24V DC to power any and all devices in a

Page 1

Basic Operation

5

OUT

4- 20 m A

mA OFF

mA

DIAL

Push & Turn

Fast Dialing
Push & Hold

Store/Step

Double Click

for Options

100%

for

to

0%

3

20.000

AUTOMATED DIAGNOSTIC CALIBRATOR

VDC %mA

Power 2 Wire

Transmi tters

Dial Ou tput t o
FULL SC ALE to
Power 2 Wire

Transmi tters

1 POWER SWITCH

Select “mA” to display and calibrate in milliamps.
Select “% 4 to 20 mA” to display and calibrate
in percent. Select “READ VDC” to read volts
DC. Return the slide switch to the “OFF”
position when not in use.

Note:

Percent mode can also be used with chart
recorders, valves or current trips that display in
percent.

100.00% = 20.000 mA

75.00% = 16.000 mA

50.00% = 12.000 mA

25.00% = 8.000 mA

0.00% = 4.000 mA

To convert from Milliamps to Percent:

Percent = (Milliamps - 4) / 0.16

To convert from Percent to Milliamps:

Milliamps = Percent / 6.25 + 4

2 SOURCE / READ / 2 WIRE SWITCH

Select “SOURCE” to output in mA or percent.
Select “READ” to read in mA or percent.
Select “2 WIRE” to simulate a 2 Wire Transmitter.

3 OMEGA SWITCH

Instantly output 4.000 mA or 20.000 mA by moving
the OMEGA
position or “20.00mA”/“100.0%” position.
three point checks select the “DIAL” position.
The CL309A-PLUS will remember the last
“DIAL” value, even with the power off.

Note: The same “DIAL” value is stored for both
mA and %. The recalled value will be displayed
in the units selected.

®

switch to the “4.00mA” /“0.0%”

For fast

4 DIAL KNOB

Turn the knob to adjust output level. Turn
clockwise to increase the output, counter
clockwise to decrease the output 0.001 mA
(0.01%) at a time. Push and turn the knob for
faster dialing adjusting 0.100 mA (1.00%) at a
time. Press and Hold the knob to start automatic
stepping or ramping. Double click the knob for
stepping and Ground Leak Detection setup.

EXTERNAL POWER JACK (Not Shown)

5

When used with the optional AC Adaptor, the
external power jack will eliminate the drain on
your batteries. This is handy for jobs that require
extended bench use of the CL309A-PLUS.
See accessories (page 10) for ordering information.

Note: This feature does not charge the batteries,
it only supplies power to the CL309A-PLUS.

CHANGING BATTERIES

Low battery is indicated by “BAT” on the display.
Approximately one to four hours of typical
operation remain before the 434 will automatically
turn off. To change the batteries; remove th
rubber boot, remove the battery door from the
back of the unit by sliding the door downward.
This allows access to the battery compartment.
Replace with four (4) “AA” 1.5V batteries being
careful to check the polarity. Replace the battery
door & replace the boot. All stored configuration
options are reset to factory settings when the
batteries are removed.

Note: Alkaline batteries are supplied and
recommended for maximum battery life &
performance.

e

Page 2

Configuration

Configure the Calibrator

Move

1 POWER SWITCH to “mA”, “% 4 to 20

mA” or “READ VDC”.

The following display will appear for 3 seconds:

CL309A-PLUS REV #.#

Double click the
unit is on and the following display will appear
for 30 seconds:

> EXIT MENU
STEPS 5
GND LEAK DET OFF
BACKLIGHT OFF
HART MODE OFF

> EXIT MENU
AUTO OFF OFF

Turn the
menu. Press the 4 DIAL KNOB to toggle
between OFF and ON. These settings are
remembered even with the power off.

EXIT MENU - exits this menu immediately and
saves any changes. Menu will automatically exit
after 30 seconds of inactivity.

4 DIAL KNOB at any time the

4 DIAL KNOB to move through the

STEPS - pressing the knob will cycle from 2, 3,
5 steps and RAMP.

2 steps will automatically switch between 4 &
20 mA (0 & 100%).

3 steps between 4, 12 & 20 mA (0, 50 &
100%).

5 steps between 4, 8, 12, 16 & 20 mA (0, 25,
50, 75 & 100%).

RAMP will continuously ramp the output
between 4 & 20 mA (0 & 100%).

GROUND LEAK DETECTION - when ON the
CL309A-PLUS has the ability to check for
current leaks caused by ground faults, moisture
or corrosion. This operates in Power/Measure
mode while powering up a 2-wire transmitter or
loop.

BACKLIGHT - If BACKLIGHT is ON the
backlight will light all the time the unit is powered
up. For maximum battery life turn the backlight
off when using the CL309A-PLUS in areas
enough ambient light to read the display.

HART MODE - when ON a 250 Ohm resistor is
automatically inserted in series with the leads in
all modes. This allows a HART Communicator to
communicate with a HART Transmitter without
adding an external resistor in the loop.

AUTO OFF - If AUTO OFF is ON, the unit will
turn off after 30 minutes of inactivity to save
battery life. If AUTO OFF is OFF the unit will stay
on until the POWER SWITCH is moved to the off
position.

Note: All settings are remembered even with the
power off. Removing the batteries resets the
values to factory defaults.

with

Page 3

Sourcing Milliamps

mA OUT, % OUT (Percent of 4 to 20 mA)

Choose this function to provide an output from 0.000 to 24.000 milliamps. The compliance voltage
is a nominal 24 VDC to provide the driving power to your milliamp receivers.

1) Disconnect one or both input wires from
the device to be calibrated.

2) Select “mA” or “% 4 to 20mA” with slide

3) Select “SOURCE” using slide switch

4) Connect the output leads of the CL309A-

The output is adjusted in 0.001 mA (0.01%)
increments by turning the knob
O M EG A s wi tc h
position, or the current can be set at the fixed
points of 4.000mA (0.00%) or 20.000mA
(100.00%) with switch
knob for faster dialing with 0.100 (1.00%)
increments.

1.

switch

2.

PLUS to the inputs of the device being
calibrated, making sure to check polarity.
Red lead to the plus (+) input and black
lead to the minus (-) input.

4 while the

3 i s in th e “ DI AL ”

3. Press and turn the

20.000

AUTOM ATED DIAGNO STIC C ALIBRAT OR

4-20 mA

VDC %mA

mA OFF

Power 2 Wire
Transmitters

DIAL

Dial Output to
FULL SCALE to
Power 2 Wire
Transmitters

Milliamp Receiver Input

OUT

mA

100%

3

0%

Push & Turn

for
Fast Dialing
Push & Hold

to
Store/Step
Double Click
for Options

Controller

Transmitter

Computer

Logger

I/P

DCS

Start automatic stepping or ramping by pressing and holding the

4 DIAL KNOB for 3 seconds. The

word STEPPING or RAMPING will flash on the display anytime the selected automatic function is
running. The CL309A-PLUS will automatically step or ramp between 4mA & 20mA (or 20mA & 4mA)
for 30 seconds then reverse direction. Stop the stepping or ramping by pressing or turning the knob
or moving any switch.

Using Automatic Stepping & Ramping

Using Automatic STEP & RAMP output

Move 1 POWER SWITCH to “mA”, or “% 4 to 20 mA” and
the 2 SOURCE / READ / 2 WIRE SWITCH to “SOURCE” or “2 WIRE”.

The starting point for automatic stepping & ramping is based
on the

3 OMEGA S W I T C H . Place t h e O M EGA swit c h

at 20 mA and the automatic stepping or ramping will start at

20.000 mA (100.00%) and the values will decrease. Place the
OM EGA swi tch at 4 mA an d th e a utom ati c st epp ing or
ramping will start at 4.000 mA (0.00%) and the values will
increase.

Start automatic stepping or ramping by pressing and holding the
word STEPPING or RAMPING will flash on the display anytime the selected automatic function is
running. The CL309A-PLUS will automatically step or ramp between 4mA & 20mA (or 20mA & 4mA)
for 30 seconds then reverse direction. Stop the stepping or ramping by pressing or turning the knob
or moving any switch.

STEPPING OUT

12.000 mA

4 DIAL KNOB for 3 seconds. The

Page 4

Simulate 2-Wire Transmitters

2 Wire mA, 2 Wire % (Percent of 4 to 20 mA)

Choose this function to simulate a 2 Wire Transmitter output from 0.000 to 24.000 milliamps.
Operates in loops with power supply voltages from 2 to 100 VDC

1) Disconnect one or both input wires
from the device to be calibrated.

2) Select “mA” or “% 4 to 20mA” with
slide switch

1.

3) Select “2 WIRE” using slide switch

2.

4) Connect the red input lead of the
434 to the plus (+) input of the field
connections and the black lead to
the minus (-).

Receiver

Powers External

2-Wire Transmitter

Power Supply

(2 to 100 VDC)

2 WIRE

12.004

AUTOMAT ED D IAGNOS TIC CA LIBRATOR

4-20 mA

VDC %mA

mA OFF

Power 2 Wire
Transmitters

DIAL

Dial Output to
FULL SCALE to

Push & Turn

Power 2 Wire

Fast Dialing

Transmitters

Push & Hold

Store/Step
Double Click
for Options

mA

100%

0%

for

to

Loop current is adjusted in 0.001 mA (0.01%) increments by turning the knob
OMEGA s wi tch

4.000mA (0.00%) or 20.000mA (100.00%) with switch

3 is in the “ DIAL” position, or the current can be set at the fixed p oi nts of

3. Press and turn the knob for faster dialing

To

Sensor

(Disconnected)

+ IN - REF +OUT-

Typical
2-Wire

Transmitter

4 while the

with 0.100 (1.00%) increments.

Start automatic stepping or ramping by pressing and holding the

4 DIAL KNOB for 3 seconds. The

word STEPPING or RAMPING will flash on the display anytime the selected automatic function is
running. The CL309A-PLUS will automatically step or ramp between 4mA & 20mA (or 20mA & 4mA)
for 30 seconds then reverse direction. Stop the stepping or ramping

by pressing or turning the knob

or moving any switch.

Setting Up Automatic Stepping & Ramping

To change the Automatic Stepping & Ramping settings

Double click the 4 DIAL KNOB at any time the unit is on and the following display will appear for 30
seconds:
Turn the
and ON or to change the steps setting. These settings are remembered even with the power off.

4 DIAL KNOB to move through the menu. Press the 4 DIAL KNOB to toggle bet ween OFF

EXIT MENU - exits this menu immediately and saves any changes. Menu will automatically exit after
30 seconds of inactivity.

STEPS - pressing the knob will cycle from 2, 3, 5 steps and RAMP.

2 steps will automatically switch between 4 & 20 mA (0 & 100%).

3 steps between 4, 12 & 20 mA (0, 50 & 100%).

5 steps between 4, 8, 12, 16 & 20 mA (0, 25, 50, 75

& 100%).

RAMP will continuously ramp the output between 4 & 20 mA (0 & 100%).

Page 5

Reading Milliamp Outputs

Voltage to be Measured

Battery

Loop Power Supply

Transmitter Voltage Drop

1 to 5 Volt Loops

Power 2 Wire
Transmitters

Dial Output to
FULL SCALE to
Power 2 Wire
Transmitters

DIAL

AUTOMATE D DIA GNOSTI C CALI BRATOR

4-20 m A

Push & Hold

to

Store/Step

Push & Turn

for

Fast Dialing

Double Click
for Options

VDC %mA

mA OFF

100%

0%

24.34

READ

V

READ mA, READ % (Percent of 4 to 20 mA)

Choose this function to measure from 0.000 to 24.000 milliamps or -25.00 to 125.00%.

1) Open the current loop at any conve­nient point along the signal path.

2) Select “mA” or “% 4 to 20mA” with slide

1.

switch

3) Select “Read” using slide switch

2.

4) Connect the red input lead (+) of the
CL309A-PLUS to the more positive
point of the break and the black input to
the more negative point.

Signals below 0 mA or open circuits are
indicated by 0.000 mA (-25.00%) on the
display. Signals above 52 mA are current

READ

4.340

mA

AUTOM ATED DIAGNO STIC C ALIBRAT OR

4-20 mA

VDC %mA

mA OFF

Power 2 Wire
Transmitters

DIAL

Dial Output to

FULL SCALE to

Push & Turn

Power 2 Wire

Fast Dialing

Transmitters

Push & Hold

Store/Step

Double Click

for Options

100%

0%

for

to

Milliamp Output Signal

Controller

Transmitter

P/I

DCS

limited by protection circuitry and
“OVERRANGE” is flashed on the display.

Read DC Volts

READ V

Choose this function to measure from -99.99 to +99.99V DC.

1) Select “VDC” with slide switch

1.

2) Connect the red (+) and black (-) leads of the CL309A­PLUS across the voltage source to be measured.

Any DC voltage from -60.00 to +60.00 volts may be
measured. Loop power supplies, signal voltages at receivers,
batteries and transmitter voltage drops may be measured.
Signals exceeding ±60.00 VDC are indicated by on the
display. Signals exceeding ±99.99 VDC will be indicated by
“OVERRANGE” flashing on the display.

READ

72.83 V

Signals exceeding ±60.00 VDC are indicated

Page 6

by on the display.

Power & Measure 2-Wire Transmitters

mA OUT, % OUT (Percent of 4 to 20 mA)

Choose this function to simultaneously supply power to a 2 Wire Transmitter while displaying the 4
to 20 mA output of the transmitter.

1) Disconnect one or both input wires from
the device to be calibrated.

2) Select “mA” or “% 4 to 20mA” with slide

3) Select “SOURCE” using slide switch

4) Press and turn the knob

5) Connect the red source lead of the

1.

switch

2.

4 clockwise

several times until full scale output
mA/125.00%) is obtained. The display will
indicate “PWR MEASURE”.

CL309A-PLUS to the plus (+) input of the
device and the black source lead to the
minus (-).

(24.000

Transmitter Input

Sensor
Process Signal
Simulated Input

+ IN - REF +OUT-

Typical

2-Wire

Transmitter

25.42

AUTOMAT ED DI AGNOST IC CAL IBRATOR

4-20 mA

VDC %mA

mA OFF

Power 2 Wire
Transmitters

Dial Output to
FULL SCALE to
Power 2 Wire
Transmitters

OUT

%

100%

DIAL

0%

Push & Turn

for

Fast Dialing

Push & Hold

to
Store/Step
Double Click
for Options

The CL309A-PLUS supplies a nominal 24 volts DC at 24 mA to the 2 Wire Transmitter. The current
passed by the transmitter will be accurately displayed by the CL309A-PLUS.

Calibrate the transmitter
in the usual manner and disconnect the CL309A-PLUS. If Ground Leak Detection is enabled the
amount of milliamps leaking in the transmitter or loop is indicated on the display.

Page 7

Using Ground Leak Detection

mA OUT, % OUT (Percent of 4 to 20 mA)

Find current leaks in loops caused by ground faults, moisture or corrosion. The 434 simultaneously
supplies power to a 2 Wire Transmitter (or loop with a transmitter) while displaying the 4 to 20 mA
output and the amount of current leaking in the loop.

1) Disconnect one or both input wires from
the device to be calibrated.

Select “mA” or “% 4 to 20mA” with slide

2)

3)

1.

switch
Select “SOURCE” using slide switch 2.

4) Turn the knob 3 clockwise several times
until full scale output (>24.000
mA/125.00%) The display will indicate
“PWR MEASURE” and “LEAKAGE:”

5) Connect the red source lead of the

12.280

INDICATOR

Transmitter Input

Sensor
Process Signal
Simulated Input

PROCESS

+ IN - REF +OUT-

Typical
2-Wire

Transmitter

PWR MEASURE OUT

12.280

LEAKAGE: 00.28mA

AUTOMAT ED DI AGNOST IC CAL IBRATOR

4-20 mA

VDC %mA

mA OFF

Power 2 Wire
Transmitters

Dial Output to
FULL SCALE to
Power 2 Wire
Transmitters

mA

100%

DIAL

0%

Push & Turn

for

Fast Dialing

Push & Hold

to
Store/Step
Double Click
for Options

CL309A-PLUS to the plus (+) input of the
device and the black source lead to the
minus (-).

The CL309A-PLUS supplies a nominal 24 volts DC at 24 mA to the 2 Wire Transmitter or loop. The
current passed by the transmitter will be accurately displayed by the CL309A-PLUS along with an
indication of leakage current at the bottom of the display. If there is an uncontrolled loop, a transmitter
with upscale burnout and bad or missing sensor or a short the display shows “ LOOP > 24mA”

Note: Many installed transmitters will normally indicate 0.01 to 0.10 mA leakage without significant
control problem. Unstable readings may indicate loose connections or the presence of moisture.

Typical Error Conditions

PWR MEASURE OUT

12.280 mA

LEAKAGE: 0 0.28mA

The CL309A-PLUS is supplying the loop
voltage. A calibrated transmitter is limiting the
loop current to 12.00 mA. An additional 0.28
mA is not controlled by the transmitter and is
leaking somewhere in the loop.

PWR MEASURE OUT

24.179 mA

LOOP > 24mA

The CL309A-PLUS is supplying the loop
voltage. There is an control loop error. This
may be a transmitter (set for upscale burnout)
with a bad or missing sensor, or a short in the
loop.

Setting Up Ground Leak Detection

Enabling Ground Leak Detection

Double click the 4 DIAL KNOB at any time the unit is on and the following display will appear for 30
seconds:
Turn the
and ON or to change the steps setting. These settings are remembered even with the power off.

EXIT MENU - exits this menu immediately and saves any changes. Menu will automatically exit after
30 seconds of inactivity.

GROUND LEAK DETECTION - when ON the CL309A-PLUS has the ability to check for current
leaks caused by ground faults, moisture or corrosion that bypass the current control element or
transmitter.

Page 8

4 DIAL KNOB to move through the menu. Press the 4 DIAL KNOB to toggle bet ween OFF

Application Notes

GROUND LEAK DETECTION

If you find a loop where the transmitter is
calibrate correctly but all the readings elsewhere
in the loop have a fixed offset this is due to a
zero shift. This zero shift is caused by some
current in the loop bypassing the transmitter.
This might be caused by ground faults, moisture
or corrosion.
If you have some loops that are erratic after it
rains there may be moisture present in a junction
box or where insulation has broken down. Turn
on Ground Leak Detection and use the CL309A­PLUS to power up the loop. Any current that isn’t
controlled by the transmitter or other current
control element will be indicated as leakage on
the CL309A-PLUS display.

The CL309A-PLUS powers up the 2-Wire
transmitter
and the uncontrolled current. This provides
information useful in troubleshooting loop errors.

OUT OF RANGE SIGNALS

Signals below 0 mA or open circuits are indicated
by 0.000 mA (-25.00%) on the display. Signals
above 24 mA are current limited by protection
circuitry to approximately 25 mA.

KEEPING THE PROCESS GOING

When an instrument in a critical control loop
develops a problem it is important to maintain
control of the process. The CL309A-PLUS can
be substituted for a faulty controller or transmitter
to provide temporary manual control of the
process. One technician takes manual control of
the process while a second technician retrieves,
installs and configures a replacement instrument.

OPEN LOOPS

The display will indicate ERROR
or -25.00% if there is an open loop or if the
polarity is reversed. Check all the connections in
the loop or try reversing the leads.

or loop and indicates the total current

and 0.000 mA

POWER TRANSMITTER

Adjusting the SOURCE output to full scale (>24
mA) supplies a nominal 24V DC to power a 2
Wire Transmitter while simultaneously displaying
the 4 to 20 mA output of the transmitter.

READ MILLIAMPS

Select READ milliamps by moving slide switch

1 to “mA” or “% 4 to 20mA” and moving slide

switch 2 to “READ”. Place the CL309A-PLUS in
the loop in series with the current to be
measured.

SOURCE MILLIAMPS or 2-WIRE SIMULATOR

Select “SOURCE” using slide switch 2 to output
from 0.000 to 24.000 milliamps using the
CL309A-PLUS’s internal power source. This will
provide 24V DC. Select “2-WIRE” to control the
current in a loop that is using
supply.
To change the output current adjust the dial

4 . Turning clockwise will increase the

knob
output value, turning counter-clockwise will
decrease the output value with 0.001 mA
(0.01%) resolution. Press and turn the knob for

T h e ou t pu t i s ad j us tab l e i n a ll O M EG A
positions.
When returning to the “4.00mA”/“0.0%” and
“20.00mA”/”100%” positions they will always
return to 4.00 (0.0%) and 20.00 (100.0%) mA.
This method is superior to keypad units. The
zero and full scale positions can be adjusted
smoothly making easy valve end stop testing,
trip point testing, alarm testing, etc. There is
virtually no overshoot/undershoot simplifying
testing.

READ DC VOLTS

Select “VDC” using slide switch
DC. Clip the leads across the voltage to be
measured.

an existing power

1 to read volts

.noituloser )%00.1( Am 001.0 htiw gnilaid retsaf

Page 9

Stroking Valves

SETTING UP VALVES

When setting up a valve it is important to correctly set the end stops. Use the CL309A-PLUS to
supply the 4 to 20 mA control signal to stroke the valve. Select “SOURCE” and the CL309A-PLUS
will use the internal power source for outputting current or switch to 2-WIRE SIMULATOR to stroke
a valve using any pre-existing installed loop power supply as the power source.

Example:

1) Disconnect the 4-20 mA control wires from the Current-to Pressure (I/P) converter or the actuator.

2) Connect the CL309A-PLUS following the connection diagrams on the previous pages for
Simulate 2-Wire Transmitters

3) Move the OMEGA switch 3 to “4.00 mA”/”0.0%” and adjust the full y closed stop on th e
actuator.

4) Turn the CL309A-PLUS’s knob
don’t move.

5) Move the OMEGA switch
CL309A-PLUS’s knob

6) Move the OMEGA switch
actuator.

7) Turn the CL309A-PLUS’s knob
move. Repeat steps 6 & 7 until no movement is detected.

8) Move the OMEGA switch
the CL309A-PLUS’s knob counterclockwise. The actuator and valve should begin to move

Repeat steps 3 & 4 until no movement is detected.

4 clockwise. The actuator and valve should begin to move.

4 slowly counterclockwise and verify that the actuator and valve

3 to DIAL and quickly back to “4.00 mA”/”0.0%” then turn the

3 to “20.00 mA”/”100.0%” and adjust the fully open stop on the

4 slowly clockwise and verify that the actuator and valve don’t

3 to DIAL and quickly back to “20.00 mA”/”100.0%” then turn

.

Additional Information

This product is calibrated on equipment traceable to NIST and includes a Certificate of Calibration.
OMEGA ENGINEERING, INC. recommends a calibration interval of one year. Contact your local

representative for recalibration and repair services.

Page 10

CL309A-PLUS Specifications

(Unless otherwise indicated all specifications are rated from a nominal 23 °C,

70 % RH for 1 year from calibration)

General

Operating Temperature Range -20 to 60 °C (-5 to 140 °F)

Storage Temperature Range -30 to 60 °C (-22 to 140 °F)

Relative Humidity Range 10 % RH 90 % (0 to 35 °C), Non-condensing

10 % RH 70 % (35 to 60 °C), Non-condensing

Size 5.63 x 3.00 x 1.60 inches, 143 x 76 x 41 mm (L x W x H)

Weight 12.1 ounces, 0.34 kg (including boot & batteries)

Batteries Four “AA” Alkaline 1.5V (LR6)

Optional AC Adaptors 120 VAC 50/60 Hz [Part # 020-0100]

240 VAC 50/60 Hz [Part # 020-0101]

Optional NiMh

Low Battery Low battery indication with nominal 1 hour of operation

Protection against misconnection Over-voltage protection to 135 vrms (rated for 30 seconds)

Display High contrast graphic liquid crystal display with 0.315” (8.0

Rechargeable battery kit

120 VAC for North America Only; charger, four
batteries, AC & DC cords [Part # 020-0103]

left

or 240 vrms (rated for 15 seconds)

mm) high digits. LED backlighting for use in low lit areas.

NiMh

Read mA

Ranges and Resolution

Accuracy ± (0.01 % of Reading +0.002 mA)

Voltage burden 2V at 50 mA

Overload/Current limit protection 25 mA nominal

Battery life 125 Hours nominal

0.000 to 24.000 mA or -25.00 to 125.00% of 4-20 mA

100 hrs with backlight on

Page 11

CL309A-PLUS Specifications (continued)

(Unless otherwise indicated all specifications are rated from a nominal 23 °C,

70 % RH for 1 year from calibration)

Source/Power & Measure Two Wire Transmitters

Ranges and Resolution 0.000 to 24.000 mA or -25.00 to 125.00% of 4-20 mA

Accuracy ± (0.01 % of Reading +0.002 mA)

Noise ± ½ Least Significant Digit

Temperature effect ± 0.005 %/°C of FS

Loop compliance voltage

Loop drive capability - Leak Detection Off

Loop drive capability - Leak Detection On

Battery life 30 hrs at 12 mA nominal; 25 hrs with backlight on

2-Wire Transmitter Simulation

Accuracy Same as Source/Power & Measure

Voltage burden 2V at 20 mA

Overload/Current limit protection 24 mA nominal

Loop voltage limits 2 to 60 VDC (fuse-less protected from reverse polarity

Battery life 125 hours nominal; 100 hrs with backlight on

24 DCV @ 20.00mA

1200 at 20 mA for 15 hours nominal;
950 with Hart Resistor enabled
1000 at 20 mA for 15 hours nominal;
750 with Hart Resistor enabled

connections)

Voltage Read

Range and Resolution -60.00 to +60.00 VDC Full Span (FS)

Accuracy ± 0.05 % of FS

Temperature effect ± 100 ppm/°C of FS

Input r

esistance 2 M

Battery life 125 hours nominal; 100 hrs with backlight on

Accessories

INCLUDED:
Carrying Case with Belt Loop Part No. SC-530
Test Leads - one pair: 1 meter (3') long with Part No. 020-0207
retractable shield banana plug & alligator clips

OPTIONAL:
AC ADAPTOR (200 to 240 VAC) Part No. CL530-ADAPTOR-220
AC ADAPTOR (100 to 120 VAC) Part No. CL530-ADAPTOR

Page 12

WARRANTY/ DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and
workmanship for a period of 37 months from date of purchase. OMEGA’s WARRANTY adds
an additional one (1) month grace period to the normal three (3) year product warranty to
cover handling and shipping time. This ensures that OMEGA’s customers receive maximum
coverage on each product.

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 in which wear is not warranted, include but are 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 the company will be as specified and free of
defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY
KIND WHATSOEVER, EXPRESSED 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 humans. 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 OMEGA’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:

1. Purchase Order number under which

the product was PURCHASED,

2. Model and serial number of the product

under warranty, and

3. Repair instructions and/or specific

problems relative to the product.

FOR NON-WARRANTY REPAIRS,

consult
OMEGA for current repair charges. Have the
following information available BEFORE
contacting OMEGA:

1. Purchase Order number to cover the

COST of the repair,

2. Model and serial number of theproduct, and

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.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2011 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,

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.

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Shop online at omega.com

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