Martel DPC300A Manuale utente
DPC300A
Reference Manual
DPC300A
Reference Manual
1. Introduction ........................................... 1
1.1 Customer Service .........................................1
1.2 Standard Equipment .......................................1
1.3 Safety information ........................................2
2. Calibrator Interface ..................................... 5
2.1 Calibrator Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Using the Backlight........................................9
2.3 Using the Zero Function ....................................9
2.4 Other Menu Controlled Functions ...........................10
3. Initial Setup and Basic Pressure Generation ............... 14
4. Measuring pressure.................................... 15
4.1 Media compatibility.......................................15
4.2 Measuring pressure with external modules ....................16
4.3 Measuring and sourcing current (4 ... 20 mA) ..................16
4.4 Measuring voltage .......................................17
4.6 Calibrating transmitters....................................20
5. Minimum and Maximum Storage Capability ................ 25
6. Remote Operation ..................................... 26
6.1 Remote Interface ........................................26
6.2 Setting up the RS-232 Port for Remote Control .................26
6.3 Changing Between Remote and Local Operation ...............27
6.4 Using Commands ........................................28
6.5 Remote Commands and Error Codes ........................30
6.6 Entering Commands ......................................32
7. Specifications (15 °C to 35 °C unless otherwise noted.) ...... 40
9. Maintenance .......................................... 41
9.1 Cleaning the Unit ........................................41
9.2 Service Center Calibration or Repair .........................41
1
1. Introduction
The DPC-300A is a high accuracy portable pressure source that can
accurately source pressure from internal and external pressure
supplies. The product includes two pneumatic pressure sources.
One source is an automated internal, -12 to 300 psi (-0.8 to 20 bar)
pump and the other is connection to allow the regulation of
externally supplied clean dry air (shop air up to 120psi). In addition
to pressure generation and measurement, the unit has full electrical
measurement capabilities from 0 to 24mA and 0 to 30VDC. It also is
able to generate 4 to 20mA signals and a full-time 24 volt loop power
supply is always available utilizing dedicated jacks on the front
panel. Additional pressure ranges can also be supported through
the use of external pressure modules. The unit can be powered by
an internal, high capacity, rechargeable battery or the included AC
adapter/charger.
1.1 Customer Service
Corporate Office:
www.martelcorp.com
e-mail: [email protected]
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: DPC-
300A, instruction manual, test leads, calibration hose kit with fittings,
16V Universal AC charger, Nist traceable calibration 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
2
33
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.
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.
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.
4
5
2. Calibrator Interface
Figure 1 shows the location of the pressure controls, connection port
and electrical inputs.
Figure: external pressure supply
REGULATOR
MAX 120 PSI
AIR SUPPLY
0-100 PSI
OUTPUT
-12-300 PSI
PUMP
-12-300 PSI
MEASURE
FINE ADJUST / VENT
PUMP
SELECTOR
MAIN
SELECTOR WARNING:
VENT BEFORE SELECTION
HOME
PUMP
ZERO
J1 J2 J3
COM
VOLTS/mA
SWITCH TEST +24v DC
PRESSURE
MODULE
F1 F2 F3
FILTER
CHARGE
PRESSURE VACUUM
P2
P3
P4
MARTEL ELECTRONICS
DPC-300A
P1 P2 P3 P4
[P1]
MENU LOWER LIGHT
psi
30.00
0 to 120 psi
Air Supply
Air Supply Mode
Figure: Pressure supply with integrated pump
REGULATOR
MAX 120 PSI
AIR SUPPLY
0-100 PSI
OUTPUT
-12-300 PSI
PUMP
-12-300 PSI
MEASURE
FINE ADJUST / VENT
PUMP
SELECTOR
MAIN
SELECTOR WARNING:
VENT BEFORE SELECTION
HOME
PUMP
ZERO
J1 J2 J3
COM
VOLTS/mA
SWITCH TEST +24v DC
PRESSURE
MODULE
F1 F2 F3
FILTER
CHARGE
PRESSURE VACUUM
P2
P3
P4
MARTEL ELECTRONICS
DPC-300A
P1 P2 P3 P4
[P1]
MENU LOWER LIGHT
psi
30.00
Air Supply Mode
Figure: Measuring
REGULATOR
MAX 120 PSI
AIR SUPPLY
0-100 PSI
OUTPUT
-12-300 PSI
PUMP
-12-300 PSI
MEASURE
FINE ADJUST / VENT
PUMP
SELECTOR
MAIN
SELECTOR WARNING:
VENT BEFORE SELECTION
HOME
PUMP
ZERO
J1 J2 J3
COM
VOLTS/mA
SWITCH TEST +24v DC
PRESSURE
MODULE
F1 F2 F3
FILTER
CHARGE
PRESSURE VACUUM
P2
P3
P4
MARTEL ELECTRONICS
DPC-300A
P1 P2 P3 P4
[P1]
MENU LOWER LIGHT
psi
300.00
-12 to 300 psi
Pressure Source
Measurement Mode
5
66
Figures 2A and 2B show the location of the keys. Table 2 describes the
function of each key.
Figure 2A
Keypad
Table 2 Key Functions
No. Name Description
1 Function Keys These are soft keys used 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 Arrow Keys Used to control mA source/sim. and to set pump
and % error limits
5Home Key Return to main menu screen
6Pump Key Push to run pump (Electric pump version)
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 range of the internal pressure sensor. 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.
7
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.
[P1]
CONFIG LOWER MORE
psi
30.000
mA MEASURE 100.00%
20.000 mA
3
1
2
Figure 3
Display
Table 3 Display Functions
No. Name Description
1 Pressure units Indication of the pressure unit (selectable from
13 pressure units)
2 Span Indicator Indicates the percent of the 4 to 20 mA span.
(For mA and mA Loop functions only)
3 Primary parameter Indicates current measured parameter
2.1.1 Top Level Menu Functionality
There are three options for this menu: MENU, {Active Display}, and
LIGHT. The Top Level Menu is home for the menu display.
2.1.1.1 Using the MENU Option
The MENU option is the gateway to the rest of the menu system.
2.1.1.2 Using the Active Display Option
The active display is indicated by the center option on the Top Level
Menu. It is used to select the display to which the ZERO key will
apply.
2.1.1.3 Using the LIGHT OPTION
The backlight can be toggled on and off using this key.
7
8
2.1.2 Main Menu Functionality
There are three options on the Menu, CONFIG, {Active Display} and
MORE. The Main Menu is home for the menu display.
2.1.2.1 Setting the Active Display
The active display is indicated by the center option on the Main
Menu, pressing the F2 key will toggle the active display.
2.1.2.2 Setting Active Display Parameters
To set the parameters of the active 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 display. The
NEXT option is used to change to the second parameter. Only
Pressure modes have a second parameter. Pressure can be read in
11 engineering units.
With a single display the following modes are available:
P[1] = Pressure internal sensor.
[EXT] = Pressure with external pressure module.
P[1] ST = Switch Test with left side sensor.
[EXT] ST = Switch Test with external pressure module.
Note: mA functions are only available on the Lower Display.
mA measure = Milliamps measure.
mA source = Milliamps source.
mA sim = Milliamps simulate using an external supply from the
UUT.
VOLTS = Voltage Measure.
The following table shows which functions are available concurrently.
An X in a column indicates that the mode in the active display will be
available for selection if the mode in that row is in use in any other
display.
8
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