Omega PCL340, M-4292-1006 User Manual

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User ’s Guide

M-4292/1006

PCL340 Series

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It is the policy of OMEGA 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 Engineering, Inc. 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.

1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.1 Contacting OMEGA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.2 Standard Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.3 Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

2. Calibrator Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2.1 Calibrator Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

2.2 Using the Backlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

2.3 Using the Zero Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

2.4 Other Menu Controlled Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

3. Measuring Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

3.1 Media Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

3.2 Measuring Pressure with External Modules . . . . . . . . . . . . . . . . . . . . .12

4. Measuring Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

5. Measuring Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

6. Performing a Pressure Switch Test . . . . . . . . . . . . . . . . . . . . . . . . .15

7. Calibrating Transmitters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

7.1 Using the mA Input Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

7.2 Calibrating a Pressure-to-Current Transmitter . . . . . . . . . . . . . . . . . . . .18

7.3 Percent Error Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

8. Factory Setups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

9. Remote Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

9.1 Remote Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

9.2 Setting up the RS-232 Port for Remote Control . . . . . . . . . . . . . . . . . .23

9.3 Changing Between Remote and Local Operation . . . . . . . . . . . . . . . .24

9.4 Using Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

9.5 Remote Commands and Error Codes . . . . . . . . . . . . . . . . . . . . . . . . .27

9.6 Entering Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

10. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

11. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

11.1 Replacing Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

11.2 Cleaning the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

11.3 Service Center Calibration or Repair . . . . . . . . . . . . . . . . . . . . . . . . .36

1. Introduction

The OMEGA PCL340 Series is designed to be a simple to use yet
very versatile pressure calibrator. Its internal pressure sensor
combined with inputs for mA, voltage and switch contacts allow the
PCL340 Series to calibrate a variety of pressure devices. An external
pressure module option allows an even wider range of pressure
calibration options including absolute and differential.

1.1 Customer Service

Omega Engineering

One Omega Drive

Box 4047

Stamford, CT 06907-0047

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: PCL340
Series Calibrator, instruction manual, test leads, carrying case,
calibration certificate with data.

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

1

Symbol Description

Double Insulated

Electric Shock

Fuse

PE Ground

Hot Surface (Burn Hazard)

Read the User’s Manual (Important Information)

Off

On

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.

2

3

• 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.

• When measuring pressure, make sure the process pressure line is
shut off and depressurized before you connect it or disconnect it
from the pressure module.

• 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.

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

Figure 1 shows the location of the process measurement inputs,
while table 1 describes their use.

Figure 1

Process Measurement Inputs

Table 1 Process Measurement Inputs

No. Name Description
1, 2 Input Terminals These terminals are used to

measure current, voltage and a
contact closure for switch test.

3 P1 Pressure Port This is the connection for the

internal sensor P1

4 Serial Interface This is used to interface to optional

external modules or optional serial
control.

Figure 2 shows the location of the keys. Table 2 describes the
function of each key.

4

Side View

Figure 2

Keypad

Table 2 Key Functions

No. Name Description
1 Function Keys These keys are used in various ways, primarily to

configure the calibrator
2 ON/OFF Key This key is used to turn the calibrator on and off
3 ZERO Key This key is used to zero pressure measurements
4 Backlight Key This key is used to turn the backlight on and off

2.1 Calibrator Display

The Calibrator Display consists of two regions: The menu bar
(located along the bottom of the screen) is used to access a menu
system. The main display (the rest) consists of up to three process
measurement sub-regions. These sub-regions will henceforth be
referred to as the UPPER, MIDDLE and LOWER displays. Figure 3
shows the location of the different display fields while table 3
describes them.

5

6

Figure 3

Display

Table 3 Display Functions

No. Name Description
1 Primary Parameters Indicates what is being measured.
2 Span Indicator Indicates the percent of the 4 to 20 mA span.

(For mA and mA Loop functions only)

3 Pressure Units Indicates one of 17 pressure units available

for display.

4 Units Indicates the unit of measure for the display.

2.1.1 Main Menu Functionality

There are three options on the Main Menu, CONFIG, {current
display} and MORE. The Main Menu is home for the menu display.

2.1.1.1 Setting the Current Display

The current display is indicated by the center option on the Main
Menu, pressing the F2 key will toggle the current display.

2.1.1.2 Setting Current Display Parameters

To set the parameters of the current display use the CONFIG option
to get to the Display Configuration Menu.

Here the SELECT option will toggle through the choices for each
parameter. The first parameter is MODE . Since voltage, current and
switch test modes all use the same jacks, two of these functions
cannot be used concurrently. The ability to select certain functions is
limited based on what is already selected in another active display.
The NEXT option is used to change to the second parameter. Only
Pressure modes have a second parameter. Pressures can be read in
13 engineering units.

7

OTHER DISPLAYS

With a single display the following modes are available:
P[1] = Pressure on left side sensor.
[EXT] = Pressure with external pressure module.
P[1] ST = Switch Test with left side sensor.
[EXT] ST = Switch Test with external pressure module.
mA = Milliamps measure without loop power.
mA LOOP = Milliamps measure with loop power.
VOLTS = Voltage Measure.

The following table shows which functions are available concurrently.
An X in a column indicates that the mode in the current display will

not be available for selection if the mode in that row is in use in any
other active display.

Table 4 Mode Concurrency

CURRENT DISPLAY

P[1] [EXT] P[1] [EXT] mA mA Volts

ST ST Loop
P[1]
[EXT]
P[1]ST X X X X X
[EXT]ST X X X X X
mA X X X X
mA Loop X X X X
Volts X X X X

2.1.1.3 Accessing Other Menus

Use the MORE option on the Main Menu to access the other menu
functions.

8

Figure 4

Menu Map

9

2.2 Using the Backlight

The backlight is controlled by the dedicated backlight key. It toggles
on and off when the key is pressed; this is one of the few functions
that cannot be controlled by the serial interface.

2.3 Using the Zero Function

When the ZERO_KEY is pressed, the calibrator will zero the current
display if a pressure mode is selected, and the pressure is within the
zero limit.

2.3.1 Internal Sensor and Pressure Module (non-absolute)

When a sensor or module is selected on the current display and the
ZERO_KEY is pressed the calibrator subtracts the current reading
from the output.

2.3.2 Absolute Pressure Module

When an absolute pressure module is selected on the current
display and the ZERO_KEY is pressed the calibrator prompts the
user to enter the barometric reference pressure. This is done using
the arrow keys (F2 and F3 Keys).

2.4 Other Menu Controlled Functions

There are eight ‘sub-main’ menus that can be accessed through the
MORE option of the Main Menu. A ‘sub-main’ menu contains three
options. The first option is unique to the function. The second and
third options of a ‘sub-main’ menu are always the same. The NEXT
option leads to the next ‘sub-main’ menu and the DONE option
returns home . For the last ‘sub-main’ menu the NEXT option wraps
around to home. See Figure 4 for a detailed mapping of the menu

structure.

A note on naming convention:

If a ‘sub-main’ menu has subordinate menus, it will henceforth be
referred to as {function} Main Menu. E.g. the display contrast sub­main menu will be called the Contrast Main Menu. If not it will be

called the {function} menu.

10

2.4.1 Setting the Contrast

From the Contrast Main Menu choose the CONTRAST option to
access the Contrast Adjustment Menu.

Use the arrow keys to adjust the display contrast to the desired level
and then use the CONTRAST DONE option to return home.

2.4.2 Locking and Unlocking Configurations

Use the LOCK CFG or UNLOCK CFG option of the Configuration
Lock Menu to lock or unlock the display configuration.

When the LOCK CFG option is chosen the menu display returns
home and the CONFIG option on the Main Menu indicates that it is
locked. Also all menus are locked out with the exception of the
Contrast Adjustment menus and the Configuration Lock Menu.
When the UNLOCK CFG option is chosen the configuration is
unlocked and the menu display continues to the next sub-main
menu.

2.4.3 Saving and Recalling Setups

The calibrator will automatically save the current set-up for recall at
power-up. Additionally 5 set-ups can be accessed through the
SETUPS menu. Select the SETUPS option from the Setups Main
Menu.

Choose SAVE to save a set-up , RECALL to recall the set-up, or
DONE to do nothing and return home.

If SAVE or RECALL is selected use the arrow keys to select the set­up location. Then use the save option to store the current set-up into
the selected location or the recall option to recall the set-up stored in
the selected location. The display menu will automatically go home.