Martel Electronics BetaGauge 321A User Manual

BETAGAUGE 311A/321A

Reference Manual

BETAGauge 311A/321A Reference Manual

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

1.1 Contacting Martel / Beta . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

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

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

2. Calibrator Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

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

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

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

2.4 Other Menu Controlled Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

3. Measuring Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

3.1 Media Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

3.2 Measuring Pressure with External Modules . . . . . . . . . . . . . . . . . . . . .14

4. Measuring Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

5. Measuring Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

6. Measuring Temperature with an RTD . . . . . . . . . . . . . . . . . . . . . . .16

7. Performing a Pressure Switch Test . . . . . . . . . . . . . . . . . . . . . . . . .17

8. Calibrating Transmitters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

8.1 Using the mA Input Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

8.2 Calibrating a Pressure-to-Current Transmitter . . . . . . . . . . . . . . . . . . . .20

8.3 Percent Error Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

9. Minimum and Maximum Storage Capability . . . . . . . . . . . . . . . . . . .23

10. Factory Setups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

11. Custody Transfer / Flow Calibration . . . . . . . . . . . . . . . . . . . . . . .25

12. Remote Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

12.1 Remote Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

12.2 Setting up the RS-232 Port for Remote Control . . . . . . . . . . . . . . . . .26

12.3 Changing Between Remote and Local Operation . . . . . . . . . . . . . . . .27

12.4 Using Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

12.5 Remote Commands and Error Codes . . . . . . . . . . . . . . . . . . . . . . . .29

12.6 Entering Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

13. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

14. Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

15. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

15.1 Replacing Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

15.2 Cleaning the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

15.3 Service Center Calibration or Repair . . . . . . . . . . . . . . . . . . . . . . . . .41

1. Introduction

The Beta 311A/321A is designed to be a simple to use yet very versatile pressure calibrator. Its two internal pressure sensors combined with inputs for mA, voltage, switch contacts and an RTD probe allow the 311A/321A to calibrate virtually any pressure device. An external pressure module option allows an even wider range of pressure calibration options including absolute and differential.

The BetaGauge 311A is a single sensor pressure calibrator; the BetaGauge 321A is a dual sensor pressure calibrator. The 311A uses the P1 port for all pressure inputs. The P2 port is only used on the model 321A. Therefore on the model 311A, all menu choices involving pressure are limited to the P1 port only. All other model 311A features and functions are the same as for the 321A.

1.1 Customer Service

Corporate Office:

www.martelcorp.com

e-mail: sales@martelcorp.com

Tel: (603) 434-1433 800-821-0023 Fax: (603) 434-1653

Martel Electronics

3 Corporate Park Dr.

Derry, NH 03038

1.2 Standard Equipment

Check to see if your calibrator is complete. It should include: Beta 311A/321A 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

Double Insulated

Symbol Description

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.

• 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

Pressure Measurement Inputs

Side View

Table 1 Process Measurement Inputs

No. Name Description

1, 2 Input Terminals These terminal 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 P2 Pressure Port This is the connection for the internal sensor P2

5 RTD Probe Connector This connector is where the RTD probe is plugged in.

6 Serial Interface This is used to interface to optional external modules as

well as for RS-232 serial communications with a PC using the LEM-232 cable(optional).

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

Figure 2

Keypad

Table 2 Key Functions

No. Name Description

1 Function Keys These keys are used in various ways, primarily to config-

ure 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

Note: When the calibrator is turned on by pressing the ON/OFF key, it will go through a short startup self-check routine. During that routine, the display shows the current firmware revision level, auto shutdown status and the ranges of the 2 internal pressure sensors. The calibrator requires a maximum of 5 minutes warm-up to rated accuracy. Large changes in ambient temperature may require a longer warm-up period. See section 2.3 for instructions on zeroing the pressure sensor displays. Pressure ranges

should be zeroed each time the calibrator is started.

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.

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 RTD and Pressure modes have a second parameter, RTDs can be read in Celsius or Fahrenheit and Pressures can be read in 11 engineering units.

With a single display the following modes are available:

P[1] = Pressure on left side sensor.

P[2] = Pressure on right side sensor.

[EXT] = Pressure with external pressure module.

P[1] ST = Switch Test with left side sensor.

P[2] ST = Switch Test with right 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.

RTD = RTD Temperature Measurement (if a probe is connected).

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] P[2] [EXT] P[1] P[2] [EXT] mA mA Volts RTD

ST ST ST Loop

P[1]

P[2]

[EXT]

P[1]ST X X X X X X

P[2]ST X X X X X X

[EXT]ST X X X X X X

mA X X X X X

mA Loop X X X X X

Volts X X X X X

RTD

Note: P2 is only available on the model 321A.

2.1.1.3 Accessing Other Menus

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

OTHER DISPLAYS

Figure 4

Menu Map

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. There are no user configuration settings for the backlight.

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. The zero limits are within 5% of the full scale range of the selected sensor. If the display indicates “OL,” the zero function will not operate.”

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. The zero limits are within 5% of the full scale range of the selected sensor. If the display indicates “OL,” the zero function will not operate.

2.3.2 Absolute Internal Sensor or Absolute Pressure Module

When an absolute module is selected on the current display and the ZERO KEY is pressed, the calibrator prompts the user to either set or default the pressure reference.

If the set option is selected, the calibrator prompts the user to enter the barometric reference pressure. This is done using the arrow keys (F2 and F3 keys). The sensor port should be open (vented) to atmosphere while performing this procedure.

Alternately, if the DEFAULT option is selected, the user is asked to confirm the choice to go to factory default or cancel the request.

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 sub-main menu will be called the

Contrast Main Menu. If not it will be called the {function} menu.

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 set-up 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.

2.4.4 Setting AutoShut-off Parameters

The calibrator can be set to automatically shut-off after a selected number of minutes; this function can also be disabled. To set the auto shut off parameters select the AUTO OFF option on the Auto Shut Off Main Menu.

Use the arrow keys to select the number of minutes before the calibrator turns off or disable auto shut-off by scrolling all the way down.

Use the AUTO OFF DONE option to set the parameters and return home. The auto shut off time is reset whenever a key is pressed.

2.4.5 Activating and Deactivating a Display

Use the DISPLAY option on the Display Selection Main Menu to access the Display Activation Menu.

The {function} option can be used to select which display to act upon. The ON/OFF option turns the selected display on or off. The selected display and current on/off state are displayed in the lower display.

Use the DONE option to save the changes and return home. When a display is deactivated its configuration is retained. When the display is activated its configuration is

checked against the configurations of the other currently active displays, if the configurations are in conflict the recalled display’s configuration is modified to avoid the conflict. If all three displays are deactivated the LOWER display will come on automatically

2.4.6 Low resolution function.

Due to the high accuracy of the 311A/321A the measured values are displayed with many digits, this might be an disadvantage in some cases, therefore the 311A/321A has a low resolution function. The function takes away the last digit.

To turn the function on or off, proceed as follows:

1. With the calibrator turned on and operating press the F3 key to activate the MORE menu option. Press the NEXT button until RESOLUTION appears in the left text field. Now press the F1 key to enter the function.

2. The select ON or OFF to turn the low resolution function on or off.

3. Pressing DONE returns to main menu.

2.4.7 Switching HART resistor on or off.

The calibrator has a built in 250 ohms serial "HART" resistor, to prevent communication errors on live HART networks, while calibrating 4-20 mA output from pressure transmitters. The resistor is switched into the loop, as a serial resistor.

To change switch in or out the HART resistor proceed as follows:

1. With the calibrator turned on and operating press the F3 key to activate the MORE menu option. Press the NEXT button until HART appears in the left text field. Now press the F1 key to enter the setup.

2. Switches the resistor on or off.

3. DONE returns to main menu.

2.4.8 Setting the RTD probe type

Use the PROBE TYPE option of the RTD Probe Type main menu to access the RTD Probe selection menu.

There are four probe types to select from P100-385, P100-392, P100-JIS and CUSTOM. Use the SELECT option to select the desired probe type and the DONE option to store the change and return home.

Note: The default probe type is PT100-385.

2.4.9 Damping

Damping can be turned ON or OFF using the Damping menu selection. When damping is ON, the calibrator displays an running average reading of ten measurements. The calibrator makes approximately 3 readings per second.

3. Measuring Pressure

To measure pressure, connect the calibrator using an appropriate fitting. Choose a pressure setting for the display being used. The calibrator is equipped with two internal sensors and many optional external sensors (EPMs) are available. Be sure to choose the sensor based on working pressures and accuracy.

Note:

Pressure sensors may be damaged and/or personnel injury may occur due to improper application of pressure. Please refer to the table of ranges and resolutions at the back of this manual for information on overpressure and burst pressure ratings. Vacuum should not be applied to any gauge pressure sensor. The calibrator display will indicate “OL” when an inappropriate pressure is applied. If “OL” is observed on any pressure display, the pressure should be reduced or vented immediately to prevent damage or possible personnel injury. “OL” is displayed when the pressure exceeds 120% of the nominal range of the sensor or when a vacuum in excess of 2 PSI is applied on gauge range sensors.

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