The Martel DMC1410 Multifunction Process Calibrator is a handheld,
battery-operated instrument that measures and sources electrical
and physical parameters. The calibrator has the following features
and functions:
• A dual display. The upper display is used for the measurement of
volts, current, and pressure. The lower display can be used to
measure volts, current, pressure, resistance temperature detectors
(RTDs), thermocouples, frequency, and resistance, and to source
pulse trains.
• A thermocouple (TC) input/output terminal with automatic
reference-junction temperature compensation
• Setpoints in each range for quickly increasing/decreasing output
Check to see if your calibrator is complete. It should include:
DMC1410 Calibrator, Instruction Manual, Test Leads, Rubber Boot,
RS-232 cable, USB adapter cable, Nylon canvas carrying case, DVD/
CD Training, Quick Start Guide, NIST Certificate
1
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
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 using a pressure module, 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.
3
• 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.
• To avoid mechanically damaging the pressure module, never apply
more than 10 ft-lb. of torque between the pressure module fittings, or
between the fittings an the body of the module.
• To avoid damaging the pressure module from overpressure, never
apply pressure above the rated maximum printed on the module.
• To avoid damaging the pressure module from corrosion, use it
only with specified materials. Refer to the pressure module
documentation for material compatibility.
4
2. Calibrator Interface
Figure 1 shows the location of the input and output connections on
the calibrator, while Table 1 describes their use.
8
F1F2F3
89
7
4
5
6
HOME
1
2
3
–
.
CE ENTER
0
MEASURE / SOURCE
3W
mA+
4W
6
mA–
MEASURE
+
V
Ω
Hz
–
+
V
TC
mA
Loop
–
9
1
2
7
4
3
5
Figure 1. Input/Output Terminals
Table 1: Input and Output Terminals
No.NameDescription
1, 2 Measure Isolated V,
mA terminals
3TC input/output Terminal for measuring, or simulating thermocou-
4,5Source/Measure
V,RTD 2W, Hz,
Input terminals for measuring current, voltage, and
supplying loop power.
ples. Accepts miniature polarized thermocouple
plugs with flat in-line blades spaced 7.9 mm
(0.312 in) center to center.
Terminals for sourcing and measuring voltage, frequency, pulse train, and RTDs
6,7Source/Measure mA
terminals, 3W 4W
Terminals for sourcing and measuring current, and
performing RTD measurements with 3-wire or
4-wire setups.
8Pressure module
connector
Connects calibrator to a pressure module for pressure measurements.
9Serial port Connects calibrator to a PC for uploading data or
remote control or to a serial printer for printing calibration certificates.
5
1
F1
F2F3
89
7
4
5
6
5
1
–
MEASURE / SOURCE
3W
mA+
4W
mA–
2
0
3
.
+
V
Ω
Hz
–
HOME
CE ENTER
MEASURE
TC
+
V
mA
Loop
–
3
4
2
Figure 2. Keypad
Figure 2 shows the location of the keys on the calibrator.
Table 2 lists the functions of each key.
Table 2. Key Functions
No. NameFunction
1Function Keys F1, F2, F3 Used to operate the menu bar at the bottom
of the calibrator display. F1 is used for
selecting options in the left box, F2 for the
center box, and F3 for the right box.
2HomeReturns to home menu on the menu bar.
3PowerTurns calibrator on and off.
4Cursor Control Key Left and right arrow keys are used to select
which decade to be changed in output
value. Up and down arrow keys are used to
increase, decrease, or ramp output value.
5Numeric KeypadAllows user to enter Numeric values.
2.1 Main Display
6
Figure 3. Display
The display of the calibrator, shown in Figure 3, is divided into three
main sections: the upper display, the lower display, and the menu bar.
The upper display is used for measuring dc voltage, dc current with
and without loop power, and pressure.
The lower display can be used for both measuring and sourcing.
The menu bar is used to setup both the upper and the lower display
to perform the desired function.
Table 3 explains the different parts of the display:
Table 3: Display Functions
No. NameDescription
1Primary Parameters Determine what parameter is going to be
measured or sourced. The available options
for the upper display are:VOLTS IN,
PRESSURE, mA IN, and mA LOOP. The
available options for the lower display
are:VOLTS, TC (thermocouple), RTD, FREQ
(frequency), PULSE, PRESSURE, mA, and
mA 2W SIM.
2Input/Output control Switches the lower display between input
mode (read), and output mode (source).
3Additional Settings Available only for TC (thermocouple), and
RTD measurements. For TC this setting
turns the CJC (Cold Junction Connection)
on and off. For RTD measure [RTD IN], this
setting sets the number of wires used in the
measurement (2-wire, 3-wire, or 4-wire)
4Span Indicator Available only for mA and mA LOOP. Shows
where in the preset span the measured
value falls. Fixed for mA at 4 (0%) and 20
(100%).
5Units Shows what unit the measurement or
source value is in. Available options are for
RTD and TC (°C or °F), and for FREQ and
PULSE (CPM, Hz, or KHz)
6Sensor Types Allow for measurements to be made for dif-
ferent types of RTDs and TCs. All types are
shown in the Specifications. Also, displays
the amplitude of the pulse and frequency
source, and pressure units.
7Numeric Displays Display the numeric values of the signal
being measured, or sourced. An "OL" reading indicates an out of range or overload
condition.
7
2.2 Menu Bar
The parameters on the display are controlled by the menu bar, which
is located at the bottom of the LCD. The function keys (F1, F2, and
F3) are used to navigate through all the levels and choices of the
menu bar. Refer to the menu tree for a clarification on the layout of
all the levels.
The top level of the menu is the home menu. It can be accessed
anytime by pressing the HOME key. There are three variations of the
home menu: the input home menu, the output home menu, and the
pulse home menu.
In the input home menu the only active options are [MENU] and
[LIGHT]. The [MENU] option is used to enter the next level of the
menu bar, the main menu. Press the corresponding function key (F1)
to enter the main menu. The [LIGHT] option is used to turn on the
LCD back light. Press the corresponding function key (F2) to turn on
the back light.
In the output home menu there are three active options, [MENU],
[LIGHT] and [STEP] or [RAMP]. The first two options work the same
as in the input home menu. The third option is selectable in the Auto
Function Menu and is used to turn on and off the selected auto
function. See Section 4.2, Using the Automatic Output Functions.
Also leaving this menu or pressing the Home button will stop the
auto functions.
The pulse home menu also has three active options, [MENU],
[TRIG], and [COUNTS]. The [TRIG] and [COUNTS] options are used
for pulse simulation. The function of these options is explained in
Section 4.2-6 (Sourcing a Pulse).
The next level of the menu bar is the main menu. The levels under
the main menu depend on what mode the calibrator is in.
The main menu has three active options [UPPER], [LOWER], and
[MORE].
Choosing [UPPER] calls up the parameter selection menu for the
upper display. Choosing [LOWER] calls up the parameter selection
menu for the lower display. [MORE] enters the next menu level.
8
The Document Mode selection menu is next. Its options are
[DOCUMENT], [NEXT], and [DONE]. Choosing [DOCUMENT]
enters the document mode menu system described in section 8 of
this manual, [NEXT] proceeds to the next menu level, and [DONE]
returns to the home menu.
The Auto Function Menu is the next menu if you are in source mode.
Its options are [AUTO FUNC], [NEXT] and [DONE]. [AUTO FUNC]
allows you to adjust the Automatic Output Function parameters.
[NEXT] proceeds to the next menu level and [DONE] returns to the
home menu. See Section 4.2,Using the Automatic Output Functions.
The contrast menu is usually the next menu level. Its options are
[CONTRAST], [NEXT], and [DONE]. The [CONTRAST] option is
used to adjust contrast. [NEXT] proceeds to the auto off main menu,
and [DONE] returns to home menu. Contrast is adjusted using the
arrow options, which are available after choosing [CONTRAST].
NOTE: The DMC1410 calibrator offers a wide range contrast
adjustment feature to accommodate operation in extreme
temperatures.
In certain cases making large changes in contrast may render the
display difficult to read under normal conditions. If this occurs and
the display is too dim or dark to read, proceed with the following
process to set the contrast back to a default setting.
1. Turn on the unit while holding down the "HOME" key.
2. Hold the key down for a count of 10 seconds to restore contrast
default settings.
If the display is so dim that you cannot tell if the unit is on or off, use
the backlight key to determine if the power is on or off.
The auto off main menu contains the options [AUTO OFF], [NEXT],
and [DONE].
The [AUTO OFF] option is used to turn the automatic shutoff on and
off, and to set the amount of time the unit needs to stay dormant
9
before it shuts off. [NEXT] proceeds to the clock menu, and [DONE]
returns to the home menu.
The Clock menu is the next menu displayed in the [MORE] menu
sequence. Its options are [CLOCK], [NEXT], and [DONE]. Choose
[CLOCK] to set the calibrator date and time as described in section 8
of this manual, [NEXT] to proceed to the terminal emulation menu,
and [DONE] to return to the home menu.
The Terminal menu is the last menu displayed after choosing
[MORE] in the main menu. Its options are [TERMINAL], [NEXT], and
[DONE]. Choose [TERMINAL] to enter terminal emulation mode.
Select [NEXT] or [DONE] to return to the home menu.
When the lower display is in the frequency or pulse mode, the
frequency level menu is added after the main menu. The options
available in this menu are [FREQ LEVEL], [NEXT], and [DONE]. The
[FREQ LEVEL] option is used to adjust the amplitude of the wave.
[NEXT] is used to access the contrast main menu, and [DONE]
returns to the home menu.
When the calibrator is in RTD CUSTOM mode, the RTD custom
setup menu, is inserted after the main menu. Options [SET
CUSTOM], [NEXT], and [DONE] are available. [SET CUSTOM] is
used to enter a custom PRT into the calibrator. Refer to Section 4.18a for instructions. [NEXT] is used to enter the contrast main menu,
and [DONE] to return to the home menu.
The pressure zeroing main menu is the final variation to choosing
[MORE] in the main menu. It has the options [ZERO ], used to zero
pressure, [NEXT] and [DONE], which have the same function as
above. Refer to the Section 5.3 for instructions on zeroing.
10
The parameter selection menu is called up when [UPPER] or
[LOWER] is selected from the main menu. It contains the following
options: [SELECT], [NEXT], and [DONE]. When the display is
selected, a parameter will start to flash. Use the [SELECT] option to
change the parameter, and the [NEXT] option to switch to another
variable. [DONE] returns to the home menu and enables the
selected mode.
2.3 Cursor control / Setpoint control
The output value can be controlled by the four cursor control arrows
on the keypad. By pressing one of the arrows a cursor will be added
to the display under the last digit of the output value. The left and
right arrow keys are used to select which decade to be changed in
the output value. The up and down arrow keys are used to increase,
decrease, or ramp the output value.
The menu bar will change to the setpoint menu with the touch of any
one of the four arrow keys.
The three function keys are associated with 0, 25, and 100% values,
respectively. 0 and 100% values can be stored by entering a value
and then holding down the corresponding function key. The 25% key
will then automatically step through the 25% values.
11
Home Menu
MENU
LIGHT
RAMP
Selection Menu
UPPERLOWERMORE
Parameter Selection
SELECT
NEXT
DONE
Document Mode Selection
DOCUMENT
NEXT
DONE
Source Mode?
Yes
No
Auto Function Menu
AUTO FUNC
NEXT
DONE
RTD Custom
No
RTD Custom Menu
SET CUSTOM
NEXT
DONE
Pressure Zero Menu
Contrast Menu
Auto Off Menu
Clock Menu
Terminal Menu
Home Menu
Frequency Out
or Pulse mode?
No
mode?
Either display in
Pressure mode?
No
Document Menus
Yes
Frequency Level Menu
FREQ LEVELNEXTDONE
Yes
Yes
ZERONEXTDONE
CONTRASTNEXTDONE
AUTO OFFNE XTDONE
12
CLOCK NEXTDONE
TERMINALN EXTDONE
Home Menu
Figure 4. The Menu Tree
3. Using Measure Modes (Lower Display)
3.1 Measuring volts and frequency
Electrical parameters volts and frequency can be measured using
the lower display. To make the desired measurements, follow these
steps:
1. Switch to the lower display [LOWER] from Main Menu.
2. Select the desired parameter for measurement.
3. Connect leads as shown in Figure 5.
Figure 5. Measuring Volts and Frequency with Input/Output
Terminals
3.2 Measuring mA
To measure mA follow these steps:
1. Switch to lower display and select mA.
2. Make sure the input/output control is set to IN.
3. Connect leads as shown in Figure 6.
Figure 6. Measuring mA with Input/Output Terminals
3.3 Measuring Temperature
3.3-1 Using Thermocouples
The calibrator supports the following thermocouple types: B, C, E, J,
K, L, N, R, S, T, U, BP, and XK. The characteristics of all the types are
13
described in
Specifications section.
The calibrator also has a
Cold Junction
Compensation (CJC)
function. Normally this
function should be ON
and the actual
temperature of the
thermocouple will be
measured. With CJC OFF,
the calibrator will measure the difference between the thermocouple
at the junction and at its TC input terminal.
Note: CJC off mode should only be used when calibration is being
done using an external ice bath.
To use the thermocouple to measure temperature, follow these
steps:
1. Attach the thermocouple leads to the TC miniplug, and insert the
plug into the input/output of the calibrator, as in Figure 7.
Note: For best accuracy wait 2 to 5 minutes for the temperature
between the miniplug and the calibrator to stabilize before any
measurements are taken.
2. Switch to lower display from Main Menu.
3. Select TC from the primary parameters. Choose [IN] in the input/
output control, and than the thermocouple type from the sensor
types. The temperature unit may also be changed from Celsius
to Fahrenheit.
The calibrator can also measure the mV of a Thermocouple, which
can be used along with a table in case the corresponding TC type is
not supported by the calibrator. To do so, proceed as above and
choose mV from sensor types.
Note: The TC wire
used must match the
thermocouple type
being calibrated.
Figure 7. Measuring Temperature Using Thermocouple Terminals
3.3-2 Using Resistance-Temperature-Detectors (RTDs)
The supported types of RTDs are shown in Section 10.
Specifications. RTDs are characterized by their 0°C resistance, R0.
14
The calibrator accepts two, three, and four wire inputs, with four wire
input being the most accurate.
To use the RTD option, apply the following steps:
1. Switch to lower display [LOWER] from Main Menu.
2. Select RTD from the primary parameters. Select [IN] from
Figure 8. Measuring Temperature with RTD Connection
Resistance can also be measured using this function. To do so,
use the above procedure and choose OHMS from the sensor
types. This option can be used along with a table to measure an
RTD which is not programmed into the calibrator.
3.4 Measuring Pressure
Note: The DMC1410 is compatible with BETA Calibrator Pressure
Modules. The accessory BPPA-100 is required for pressure
measurement.
Note: Pressure is not read from modules with frequency or pulse
train mode enabled.
Note: On high pressure modules engineering units normally
associated with low pressure ranges such as, inH2O, cmH2O, etc. are
not valid selections. Selecting one of these units with a high
pressure module attached will cause the display to read "----".
Warning!
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.
15
Caution
To avoid mechanically damaging the pressure module, never apply
more than 10 ft-lb. of torque between the pressure module fittings, or
between the fittings an the body of the module.
To avoid damaging the pressure module from overpressure, never
apply pressure above the rated maximum printed on the module.
To avoid damaging the pressure module from corrosion, use it only
with specified materials. Refer to the pressure module
documentation for material compatibility.
To measure pressure, follow these steps:
1. Connect the pressure module to the calibrator as shown in
Figure 9.
The calibrator can measure pressure on both the upper and the
lower display. This makes it possible to measure pressure in two
different units at the same time.
2. Switch to either upper or lower display from the Main Menu.
3. Select [PRESSURE] from the primary parameters.
4. Select the desired measuring unit.
5. Zero the pressure module. The zero function on the calibrator
can be found in the pressure zeroing menu.
VALVE
PRESSURE
MODULE
F1
F2F3
89
7
4
5
6
1
2
3
–
.
0
MEASURE / SOURCE
3W
+
mA+
V
Ω
Hz
4W
–
mA–
Figure 9. Connections for Measuring Pressure
3.4-1 Zeroing with Absolute Pressure Modules.
To zero, adjust the calibrator to read a known pressure, such as
barometric pressure.
16
HOME
CE ENTER
MEASURE
TC
+
V
mA
Loop
–
To adjust the calibrator, follow these steps:
1. Enter the pressure zeroing menu.
2. Select [ZERO ]. [SET REFERENCE ABOVE] will
appear. Enter the pressure using the keypad.
3. The calibrator stores the Barometric zero offset in non-
volatile memory.
The zero offset is stored for one absolute pressure module at a
time. If a new absolute module is connected this process must
be repeated.
4. Using Source Modes (Lower Display)
The calibrator can generate calibrated signals for testing and
calibrating process instruments. It can source voltages, currents,
resistances, frequencies, pulses, and the electrical output of RTD
and thermocouple temperature sensors.
4.1 Setting 0% and 100% Output Parameters
To set the 0% and 100% points, use the following steps:
1. Select the lower display [LOWER] from Main Menu, and choose
the desired primary parameter.
2. Select output [OUT] from the input/output control, and enter the
desired value. For example select [VOLTS OUT].
3. Enter 5V with the keypad and press Enter.
4. Press any one of the four cursor control arrows to display the
setpoint control menu.
5. Hold down the Function Key that corresponds to 0% [F1]. 0%
will flash and the setpoint is stored.
6. Repeat these steps, entering 20V and holding the Function Key
that corresponds to 100% [F3].
7. Use the 25% key to cycle 5 V and 20 V in 25% increments.
17
4.1-1 Stepping the current output
To use the 25% function with mA output, follow these steps:
1. Select the lower display from the Main Menu, and choose
mA.
2. Use the 25% key to cycle between 4 mA and 20 mA in 25 %
intervals.
4.2 Using the Automatic Output Functions
There are two automatic output functions, step and ramp. The
selected function can be turned on and off using the Output Home
Menu. The Automatic Output Function parameters can be set in the
Auto Function Menu.
Parameters include:
1. Which auto function will be available (Step or Ramp).
2. The Auto Function Time, time between steps for step and time to
get from over one limit to the next for ramp.
The limits for the ramp and step functions are set to the 0% and
100% values. See Section 4.1 Setting 0% and 100% Output
Parameters. Steps are in 25% increments from the 0% value to the
100% value.
4.3 Sourcing mA
To source a current, follow these steps:
1. From the Main Menu select lower display [LOWER]. Choose
[mA] from the primary parameters.
2. Switch to input/output control, and select output [OUT].
3. Connect the leads to the mA terminals, as shown in Figure 10.
4. Enter the desired current using the keypad.
18
Figure 10. Connections for Sourcing Current
4.3-1 HART™ Resistor Selection
The DMC1410 can be set-up so that the 250 ohm resistor required
for HART™ configuration devices resides inside the DMC1410.
Enabling the DMC1410's internal 250 ohm resistor eliminates the
need to manually add a series resistor during a HART™ calibration
process.
NOTE: When the DMC1410's internal 250 resistor is enabled,
maximum load driving capability drops from 1000 ohms @ 20mA to
750 ohms @20mA.
Enable/Disable Procedure
1. Remove the battery cover and remove the 2 screws that are
at the top of the case.
2. Remove the 2 screws on the bottom or lower portion of the
case.
3. Gently remove the top half of the case from the bottom.
4. Figure 10a. shows the location of the HART™ jumpers.
Figure 10a.
4.4 Simulating a Transmitter
To have the calibrator supply a variable test current to a loop in place
of a transmitter, follow these steps:
1. Select lower display from the Main Menu.
19
2. Choose mA simulation from the primary parameters [mA 2W
SIM], and enter the desired current.
3. Connect the 24V loop as shown in Figure 11.
Figure 11. Connections for Simulating a Transmitter
4.5 Sourcing volts
To source volts follow these steps:
1. Select lower display from the Main Menu.
2. Choose [VOLTS] from the primary parameters. Switch to input/
output control and select output [OUT].
3. Connect the leads for the voltage source terminals, as shown in
Figure 12.
4. Enter the voltage using the keypad.
Figure 12. Connections for Sourcing Voltage and Frequency
20
4.6 Sourcing frequency
To source a signal use these steps:
1. Switch to the lower display and select frequency from the
primary parameters.
2. Select output, and than choose the frequency units.
3. Connect the leads to the frequency output terminals as shown in
Figure 12.
4. Enter the desired frequency using the keypad.
5. To change the amplitude, select [FREQ LEVEL] from frequency
level menu.
6. Enter the amplitude.
4.7 Sourcing a pulse train
The calibrator can produce a pulse train with an adjustable number
of pulses at a desired frequency. For example, setting the frequency
to 60Hz and the number of pulses to 60 would produce 60 pulses for
a period of 1 second. To source a pulse, use the same connection
as for frequency, and proceed as follows:
1. Switch to the lower display and select pulse from the primary
parameters.
2. Choose the desired unit and enter the frequency using the
keypad.
3. Select the [COUNTS] function from the home menu to enter the
number of pulses. Use [TRIG] to start and stop the signal.
4. The amplitude of the pulse can be adjusted in the same manner
as for frequency.
21
Figure 13. Connections for Outputting Thermocouples
4.8 Sourcing Thermocouples
To source a thermocouple use the following steps:
1. Connect the thermocouple leads to the appropriate polarized TC
miniplug, and insert the plug into the TC terminals on the
calibrator, as shown in Figure 13.
2. Select lower display from the Main Menu, and choose
thermocouple [TC] from the primary parameters.
3. Choose output [OUT] from the input/output control.
4. Select the desired thermocouple type from the sensor types.
5. Enter the temperature using the keypad.
22
Figure 14. Connections for Outputting RTDs
4.9 Sourcing Ohms/RTDs
To source an RTD, follow these steps:
1. Select lower display from the Main Menu, and choose [RTD]
from the primary parameters.
2. Choose output [OUT] from the input/output control, and select
RTD type from the sensor types.
3. Connect the calibrator to the instrument being tested, as in
Figure 14.
4. Enter the temperature or resistance using the keypad.
Figure 15. Using a 3- or 4-wire Connection for RTDs
Note: The calibrator simulates a 2-wire RTD. To connect 3- or 4-wire
transmitter, use stacking cables, as shown in Figure 15.
4.9-1 Custom RTD
A custom curve-fit PRT may be entered into the calibrator for
sourcing and measuring. To do so follow these steps:
1. Switch to lower display. Select RTD and set sensor type to
CUSTOM.
23
2. Enter the RTD custom setup main menu, and select [SET
CUSTOM].
3. Using the keypad, enter the values that the calibrator prompts
for: minimum temperature, maximum temperature, R0, and
the values for each of the temperature coefficients.
The custom function uses the Calendar-Van Dusen equation for
outputting and measuring custom RTDs. The coefficient C is
only used for temperatures below 0°C. Only A and B coefficients
are needed for the range above 0°C, so coefficient C should be
set to 0. The R0 is the resistance of the probe at 0°C. The
coefficients for PT385, PT3926, and PT3616 are shown in Table 4
below.
Table 4. RTD Coefficients
RTDRange(°C) R0Coefficient ACoefficient BCoefficient C
Use the following steps to measure the voltage or current output of a
transmitter.
1. Select the upper display from the Main Menu.
2. Select the desired primary parameter to be measured. Connect
the leads to the isolated inputs of the calibrator, as in Figure 16.
Figure 16. Isolated Input Connection
24
5.2 Measuring current with loop power
To test a 2-wire, loop powered transmitter that is disconnected from
wiring, use the loop power function. This function activates a 24V
supply in series with the current measuring circuit. To use this option
proceed as follows:
1. Select [mA LOOP] as primary parameter in the upper display.
2. Connect the calibrator to transmitter current loop terminals, as
shown in Figure 17.
Figure 17. Connection Using Current Loop
5.2-1 HART™ Resistor Selection
The DMC1410 can be set-up so that the 250 ohm resistor required
for HART™ configuration devices resides inside the DMC1410.
Enabling the DMC1410's internal 250 ohm resistor eliminates the
need to manually add a series resistor during a HART™ calibration
process.
NOTE: When the DMC1410's internal 250 resistor is enabled,
maximum load driving capability drops from 1000 ohms @ 20mA to
750 ohms @20mA.
Enable/Disable Procedure
1. Remove the battery cover and remove the 2 screws that are
at the top of the case.
2. Remove the 2 screws on the bottom or lower portion of the
case.
25
3. Gently remove the top half of the case from the bottom.
4. Figure 10a. shows the location of the HART™ jumpers.
5.3 Measuring Pressure
Note: The DMC1410 is compatible with BETA Calibrator Pressure
Modules. The accessory BPPA-100 is required for pressure
measurement.
Note: Pressure is not read from modules with frequency or pulse train
mode enabled.
Warning!
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 mechanically damaging the pressure module, never apply
more than 10 ft-lb. of torque between the pressure module fittings, or
between the fittings an the body of the module.
To avoid damaging the pressure module from overpressure, never
apply pressure above the rated maximum printed on the module.
To avoid damaging the pressure module from corrosion, use it only
with specified materials. Refer to the pressure module documentation
for material compatibility.
To measure pressure, follow these steps:
1. Connect the pressure module to the calibrator as shown in Figure
18.
The calibrator can measure pressure on both the upper and the
lower display. This makes it possible to measure pressure in two
different units at the same time.
2. Switch to either upper or lower display from the Main Menu.
3. Select [PRESSURE] from the primary parameters.
4. Select the desired measuring unit.
5. Zero the pressure module. The zero function on the calibrator can
be found in the pressure zeroing menu.
26
VALVE
PRESSURE
MODULE
F1
F2 F3
89
7
4
5
6
2
0
MEASURE / SOURCE
3
.
+
Ω
Hz
CE ENTER
V
–
HOME
MEASURE
+
V
TC
mA
Loop
–
1
–
3W
mA+
4W
mA–
Figure 18. Measuring Pressure Transmitter
Note: On high pressure modules engineering units normally
associated with low pressure ranges such as, inH2O, cmH2O, etc. are
not valid selections. Selecting one of these units with a high
pressure module attached will cause the display to read "----".
6. Using the Upper and the Lower Display for
Calibration and Testing
6.1 Testing an Input or Indicating Device
To test and calibrate actuators, recording, and indicating devices
using the source functions, follow these steps:
1. Select the lower display and choose the correct primary
parameter.
2. Switch to [OUT] in the input/output control.
3. Connect the leads to the instrument and the calibrator as shown
in Figure 19.
Figure 19. Connections for Testing an Output Device
27
6.2 Calibrating an I/P Device
The following steps show how to calibrate a device that controls
pressure:
1. Select upper display from the Main Menu, and select pressure
from the primary parameters.
2. Switch to lower display from the Main Menu, and select current
source [mA out] from the primary parameters.
3. Connect the calibrator to the device as shown in Figure 20. The
calibrator will simulate the transmitter current and measure the
output pressure.
4. Enter a current using the keypad.
F1
F2F3
89
7
4
1
–
MEASURE / SOURCE
3W
mA+
4W
mA–
5
6
HOME
2
3
.
CE ENTER
0
MEASURE
+
+
V
V
TC
mA
Ω
Loop
Hz
–
–
TEST
+
SIGNAL
–
Figure 20. Calibrating an I/P Device
6.3 Calibrating a Transmitter
To calibrate a transmitter both the upper and the lower displays will
be used; one for measuring and the second a source. This section
covers all but the pressure transmitters. A thermocouple temperature
transmitter is used in this example.
The following steps show how to calibrate a temperature transmitter:
1. From the Main Menu select upper display, and choose current
loop [mA LOOP].
2. Switch to lower display from the Main Menu, and select [TC]
from the primary parameters. Choose output [OUT] from the
input/output control, and select TC type.
3. Set the 0 % and 100 % span points using the keypad and the
0% and 100% keys (refer to Setting 0 % and 100 % Parameters
section).
28
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