DMR30-TC1-1-DC4-R-C.

DMR30-TC1 Series Thermocouple Temperature Meter PRODUCT OVERVIEW The DMR30-TC1 digital panel meter performs precision temperature measurements when used in conjunction with an external thermocouple. Supported thermocouples include ANSI types J, K, E and T. This meter features a highly visible, 0.45" (11.4mm) high, 5 character+sign alphanumeric LED display which can provide up to 4 digits of measurement resolution. Configuration is made easy by a contactless touch-sensor front-panel user interface, eliminating the need for jumpers, potentiometers, or DIP switches. The meter is powered from an external 9-32VDC supply and typically requires only 40mA when operated at 12V. An isolated solid-state relay can be set to close at user-defined trip-points, providing external signaling capability. The meter features a rugged polycarbonate housing that is mountable in a round hole using the supplied nut and gasket, or by using 3 #4-40 (M3) screws. The DMR30-TC1's features make it ideal for use in laboratory instrumentation, factory automation, and other applications requiring precise temperature monitoring. Features            Works with ANSI type J,K,T, and E thermocouples Selectable Celsius, Fahrenheit or Kelvin measurement units Bright 0.45" (11.4mm) LED display visible up to 20 feet (6 meters) Long-life contactless touch-sensor controls Peak and valley measurement modes Digital filter option for measurements in noisy environments Solid-state alarm relay with programmable trip-point and hysteresis Convenient mounting options Operates from 9 to 32 VDC Low current consumption; 40mA typical at 12VDC Two year warranty ORDERING INFORMATION: DMR30-TC1-1-DC4-R-C DMR30-TC1-1-DC4-G-C * DMR30-TC1-1-DC4-B-C * *Contact factory for availability. ACCESSORIES DMRTCJ24FEP2C DMRTCK24FEP2C Thermocouple meter, alarm output, red display Thermocouple meter, alarm output, green display Thermocouple meter, alarm output, blue display Type ‘J’ Thermocouple probe, 2m length, FEP Insulation Type ‘K’ Thermocouple probe, 2m length, FEP Insulation SIMPLIFIED BLOCK DIAGRAM DMR30-TC1 THERMOCOUPLE INPUTS +TC (1) ALPHANUMERIC DISPLAY AND ANNUNCIATORS ALARM MAX MIN ADC -TC (2) TOUCH SENSOR KEYPAD MICROCONTROLLER RESET MENU MODE POWER INPUTS +VS (3) -VS (4) Solid State Relay PTC Fuse RELAY OUTPUTS (6) RELAYA 3.3V DC-DC (5) RELAYB For full details go to https://www.murata-ps.com/rohs https://www.murata-ps.com/support DMR30-TC1.A01 Page 1 of 10 DMR30-TC1 Series Thermocouple Temperature Meter MEASUREMENT PERFORMANCE Supported Thermocouple Types Meter Measurement Range: J type thermocouple (note 1) K type thermocouple E type thermocouple T type thermocouple Meter Measurement Accuracy: J type thermocouple (-200°C to +600°C) (notes 2,3,4) K type thermocouple (-25°C to +1200°C) E type thermocouple (-25°C to +700°C) T type thermocouple (-200 °C to +200°C) Min. J, K, E, T Typ. -200 -270 -270 -270 Max. Units 1900 1370 1000 400 °C °C °C °C °C °C °C °C ±2 ±2 ±2 ±2 Notes: 1) Measurement range is defined by range of internal measurement system and linearization tables and will generally exceed the recommended application temperature range for a given thermocouple type. 2) Meter Accuracy is the meter’s contribution to the measurement error. Variation in thermocouple sensors used with the meter may significantly increase the total system measurement error. 3) Typical accuracy with meter at 25 °C. 4) Characterized against calibrated thermocouple simulator. POWER SUPPLY CHARACTERISTICS. Operating Supply Voltage Absolute Maximum Supply Voltage Operating Supply Current 12V operation 24V operation USER INTERFACE Display Type and Size User Controls Measurement Units Display Modes Over-range Indication Open-Thermocouple Indication Display Update Rate Decimal Point Selection Main Menu Password RELAY OUTPUT ‘Off’-state voltage (measured across REALYA to RELAYB) terminals ‘On’-state current ‘On’ state resistance Min. 9 -1 - 40 25 Max. 32 35 Units VDC VDC - mA 5 Digit Alphanumeric LED, 11.4mm (0.45in) Height 3 LED Annunciators (‘Alarm’,’Max’,’Min’) Four capacitive touch sensors °C, °F, °K , user selectable Current Temp (Normal), Max Temp, Min Temp, Flashing Value Flashing ‘OPEN’ prompt 2.5 updates/sec. Automatically Set Min. -40 -250 Typ. Max. +40 +250 1 TERMINAL BLOCKS (TB1, TB2, TB3) Wire Size Insulation Strip Length Screw Tightening Torque PHYSICAL/ENVIRONMENTAL Operating Temperature Storage Temperature Humidity (non-condensing) Dimensions Weight Typ. Units V mA Ω 14-24 AWG 6mm (0.24 in.) 0.4 N-m (3.5 lb-in) Min. 0 -40 0 Typ. Max. Units +50 ⁰C +75 ⁰C 85 % See Mechanical Specifications Drawing 64g (2.2 oz.) https://www.murata-ps.com/support DMR30-TC1.A01 Page 2 of 10 DMR30-TC1 Series Thermocouple Temperature Meter OPERATION: Measurement Type and Capabilities DMR30-TC1 series temperature meters employ precision ADCs and a low-power microcontroller to measure and display temperature. Accurate linear measurement, over a wide temperature range relies on internal compensation tables to precisely convert measured thermocouple voltage to temperature. See additional details. Further enhancement is made possible by adapting ‘cold-junction’ compensation, whereby the thermocouple terminal block temperature is measured by a sensor located on the PCB near the connector. FRONT PANEL & FRONT PANEL LAYOUT AND FUNCTION 1. 1 2 2. 3. 3 Annunciator LEDs: This cluster of 4 LEDs is used to indicate various meter states, such the status of the alarm relay, measurement modes, and units. Display: This is a 5-character + sign alphanumeric LED display is used to indicate measurements, informational prompts, and meter setup parameter values. Touch-Sensor Control Buttons: Four capacitive touchsensors are provided to support meter control and configuration. These four buttons will be referred to in this document as , , , and reflecting their printed arrow directions. Default Measurement Mode DMR30-TC1 meters normally operate in ‘measurement mode’, in which the meter displays the current value of the measured temperature. If the measured input value falls outside of the meter’s acceptable measurement range, either over-range or under-range, the display will flash. If the meter’s alarm functions are enabled, the ALARM annunciator is lit whenever the alarm relay is activated (closed). Alternate Measurement Modes In addition to displaying the current value of the measurement, the meter can also display historical high and low values. To perform these operations, the meter offers a number of alternate measurement modes: 1. In MAX mode, the meter displays the highest value which has been measured since the last time the user pressed the button (RESET). MAX mode is active when the MAX LED is illuminated. 2. In MIN mode, the meter displays the lowest value which has been measured since the last time the user pressed button (RESET). MIN mode is active when the MIN LED is illuminated. These alternate measurement modes may be selected by repeatedly pressing the button until the desired mode LED is illuminated. The alternate modes may be disabled by repeatedly pressing the button until all mode LEDs are off and the meter is returned to normal operating in which it will display the current measurement. Access to the alternate measurement modes may be disabled by setting the MODES setting to OFF using the configuration menu. If alternate modes are disabled, then pressing either the or buttons will result in an ‘ERROR’ message being briefly displayed before resuming normal operation. https://www.murata-ps.com/support DMR30-TC1.A01 Page 3 of 10 DMR30-TC1 Series Thermocouple Temperature Meter ELECTRICAL CONNECTIONS: Screw terminal Location: Terminal # 1 2 3 4 5 6 Name +TC -TC +VS -VS RELAYB RELAYA Function Thermocouple inputs Power supply inputs (9VDC - 32VDC) Solid-state relay alarm outputs Note: It is important to tighten all screw-terminals to their torque specification of 4.5 lbf-in (0.51Nm). Proper tightening will help ensure reliable operation. Applications subject to vibration should use stranded wire. Alarm Relay Connections (back to operation section) DMR30-TC1 provides a solid-state relay output that ‘closes’ upon alarm condition detection. This circuit is electrically isolated from the meter’s measurement circuitry and power supply inputs providing a high degree of application flexibility. Caution is required when driving loads having high inrush current such as incandescent lamps, or inductive loads such as electromechanical relays since associated current and voltage spikes may damage the meter. When used to drive an inductive load, such as an electromechanical relay, a ‘flyback’ diode should be connected across the relay coil (ensuring correct polarity so that it will not forward conduct under normal use) to suppress high transient voltages that may damage the DMR30-TC1, as shown in the following illustration: DMR30-TC1 DC SUPPLY RELAYA RELAYB • • ELECTROMECHANICAL RELAY ‘FLYBACK’ DIODE Note that the diode must be connected so that it does not forward conduct when the relay is turned on. Notes: The alarm relay circuit’s isolation is not intended for use as a safety isolation barrier. The maximum voltage between the alarm relay terminals (RELAYA or RELAYB) and the thermocouple input terminals (+TC, -TC) or power supply terminals (+VS, -VS) must be limited to +/-48VDC. The alarm relay is intended to provide an informational signal of over-temperature/under-temperature conditions; for example driving a piezoelectric siren or LED lamp to signal the condition. The DMR30’s alarm output relay must not be used in the control loop of any type of system where it either directly or indirectly signals that a heating or cooling element is to be turned on or off, or used as a safety limit switch. Power Supply Connections The meter is powered by connection of an external 9VDC to 32VDC source to the +VS and –VS terminals. Additionally: • Isolation: Thermocouple terminals (+TC, -TC) are electrically isolated from the power supply terminals (+VS, -VS). The maximum voltage between the power supply terminals and the thermocouple input terminals must be limited to +/-48VDC. • Protection: The DMR30 series of meters incorporates protection against momentary applications of both overvoltage and reverse polarity to the power supply (+VS, -VS) terminals. Depending on regulatory and application requirements it may also be necessary for the user to add external fusing. Link to additional notes https://www.murata-ps.com/support DMR30-TC1.A01 Page 4 of 10 DMR30-TC1 Series Thermocouple Temperature Meter ELECTRICAL CONNECTIONS: (continued) Thermocouple Inputs DMR30-TC1 is designed for a wide range of applications and accept a wide range of industry standard probe types: ‘J’, ‘K’, ‘E’, and ‘T’. For accurate measurements it is important to connect the thermocouple leads correctly and configure the meter as follows: • • • • Polarity must be correct: The thermocouple “+” and “-“ must match the same polarity of the meters input terminal. For ANSI colorcoded thermocouple wire, proper connections are shown in APPENDIX A. Meter configuration must match: Ensure the internal meter probe type setting matches actual probe type connected (see menu details). The default setting is type “J” Thermocouple length: To minimize risk of external noise pickup and subsequent degradation of the measurement quality, keep length of thermocouple wire as short as possible. Operation with open thermocouple: Indicated on the display as display a flashing ‘OPEN’. CONNECTION EXAMPLE The following shows a DMR30-TC1 application where the alarm relay is used to drive a piezoelectric siren. In this example, a 12VDC power supply is connected to the +VS and –VS terminals, the voltage to be measured is connected to the +TC and –TC inputs, and the alarm relay is used to control a piezoelectric siren, which is also powered from the +12VDC power supply. MENU AND CONFIGURATION (back to Product Overview) The DMR30 family incorporates an interactive menu system to support meter configuration. This system eliminates the need for jumpers, dipswitches or trim-pots, and also allows the meter be easily configured after it has been installed in an application. Entering and Navigating the Menu System The DMR30’s user configuration system is structured as a main menu from which individual configuration options are selected for editing. When in measurement mode, pressing the button will cause the meter to enter the main menu, and display the first main menu entry – “Range”. To prevent accidental changes to the meter’s configuration, entry to the main menu may optionally be password protected. If the password protection option is enabled (See MLOCK entry on pg.8 for details), then the user will be prompted to enter a series of five buttontouches to enter the main menu. Once in the main menu, the meter will display the currently selected entry. The and buttons may be used to change the active selection. https://www.murata-ps.com/support DMR30-TC1.A01 Page 5 of 10 DMR30-TC1 Series Thermocouple Temperature Meter MENU DIAGRAM: DMR30-TC1 (back to rear panel details) Mlock=ON Passcode Menu Mlock=OFF Units D Fmt TCsel Filt Alarm Aset Ahyst Atest Modes Mlock Frst Main Menu Bolded Items are Factory Defaults TC-T TC-E TC-K LoLim HiLim OFF Confirm Yes/No ON OFF Numeric Entry Reset To Factory Defaults Enable Min/Max Modes Enter Alarm Hysteresis Value Choose Alarm Enabled/Type TC-J Deg K Deg F Deg C Thermocouple Type Selection Temperature Units Selection Slow ON OFF A-ON A-OFF Numeric Entry Fast OFF Password Protect Settings Interactive Alarm Relay Test Enter Alarm Set-point Value Select Digital Data Filter Auto 1999 199.9 Display Format Selection USING THE MENU When the meter is displaying a main menu item, pressing the button will display the submenu associated with that menu item. For example, if D Fmt is the currently selected main menu item, then pushing the button will display the data format submenu, and display the currently selected data format. Exiting the main menu and return to measurement mode may be done in two ways. The first is to press the button. The second method is to simply do nothing – if the meter is in the menu system and no button presses are registered for approximately 60 seconds, the meter will automatically return to measurement mode. The arrow also may be used to return from a submenu back to the main menu. The Main Menu The DMR30-TC1 has the following MAIN MENU configuration options: • UNITS – Selects the units the meter uses to display temperature, with available options of degrees Celsius, Fahrenheit, or Kelvin. The display UNITS setting is chosen by scrolling through the list of options (DEG C / DEG F / DEG K) using the and buttons. When the desired UNITS setting is displayed, pressing the will update the UNITS option to the displayed value and return to the main menu, while pressing the button will return to the main menu without updating the option value. • D FMT - The D Fmt submenu is used to select the number of digits used to display the measurement. The available options are 000.0 (tenths of a degree), 000 (degrees), or AUTO, which dynamically chooses the display format based on the measurement value. The and buttons are used to scroll through the available options. When the desired setting is displayed, pressing the button will update the D Fmt option to the displayed value and return to the main menu, while pressing the button will return to the main menu without updating the option value. https://www.murata-ps.com/support DMR30-TC1.A01 Page 6 of 10 DMR30-TC1 Series Thermocouple Temperature Meter MENU AND CONFIGURATION : (continued) • TCSEL – The TCsel submenu lets the user specify the type of thermocouple that is being used. The DMR30-TC1 supports type J, K, E, and T thermocouples. The and buttons scroll through the available thermocouple options. To select the displayed option, press the button. To return to the MAIN MENU without changing the option value, press the button. It is extremely important that this setting matches the thermocouple type that is connected to the meter. Failure to correctly set this option may result in significant errors in temperature measurements. • FILT – The Filt option selects the degree of digital filtering that is applied to the measured signal. The available options are (1) OFF in which no filtering is used, (2) Fast – in which a small amount of filtering is applied to the signal, and (3) Slow – in which a larger amount of filtering is applied to the signal. The and buttons are used to scroll through the filter options. Pressing the button will update the option to the displayed value and return to the main menu. Pressing the button will return to the main menu without updating the option. • ALARM – The Alarm submenu controls the operation of the alarm relay output. This submenu has three available options; (1) OFF, where the alarm output is disabled and always off (“open” state), (2) HiLim, where the alarm relay is turned on (“Closed” state) when the measured temperature is greater than the alarm set-point value, and (3) LoLim, where the alarm output is turned on when the measured temperature is less than the alarm set-point value. The and buttons may be used to scroll through these options. To update the setting to the selected option and return to the MAIN MENU, press the button. To return to the MAIN MENU without updating the setting, press the button. • ASET – The Aset submenu is a numeric entry field used to set the alarm set-point value. On entry to this submenu, the current value of the alarm set-point is displayed and may be edited. Upon entering this option, the display will show the current alarm value, and set a blinking cursor at the sign character. The and buttons are used to set the sign or to increment/decrement the currently selected digit. The button selects the next digit, or if at the rightmost digit, accepts the displayed value and returns to the MAIN MENU. The button can be used to move the cursor left, or if the cursor is set to the sign position, exits the submenu without changing the current alarm set-point value. ASET values are stored internally in degrees C and converted on-the-fly to the currently selected UNITS setting (C/F/K) when displayed and edited. Changing the UNITS setting will automatically convert the ASET value into the new units. • AHYST – This setting controls the alarm hysteresis value. When the alarm is set to HILIM mode, the hysteresis is subtracted from the alarm set-point to get a ‘turn-off’ threshold below which the alarm relay is opened. Similarly (but opposite), when the alarm is set to LOLIM mode, the hysteresis value is added to the set-point to provide a turn-off threshold above which the alarm relay is opened. The process for setting the alarm hysteresis value is similar to setting the alarm set-point value, with the buttons providing identical functionality. Unlike ASET values, however, AHyst values may only be set to values greater than or equal to zero. As is the case with ASET values, AHyst values are also stored internally as degrees C and converted on-the-fly for display and editing in the current UNITS setting (C/F/K). • ATEST – The Atest submenu allows the user to interactively test the alarm relay circuit without needing to adjust either the alarm setpoint or the signal applied to the meter inputs. On entering this menu option, the button will turn the alarm relay ON, while the button will turn the alarm relay OFF. Either the or buttons will exit this submenu, set the alarm relay to the OFF condition, and return to the MAIN MENU. Note that the alarm relay is set to the OFF state when the meter is in the menu system regardless of either the meter input signal alarm settings. • MODES – The Modes submenu is used to enable or disable the alternate measurement modes. When the Modes option is set to ON, all available modes for the meter will be available from the front panel in operating mode. When this option is set to OFF, attempting to set the meter to an alternate measurement mode will result in an ERROR message being displayed. • MLOCK – The MLock submenu is used to enable or disable password protection for the MAIN MENU. If Mlock option is set to ON, pressing the button in operating mode results in a flashing cursor, prompting for the entry of a button-sequence password. The following password sequence must then be entered to access the MAIN MENU: If the MLock option is set to OFF, pressing the button in operating mode will immediately enter the MAIN MENU. Note that the password is set at the factory and is not user-modifiable. https://www.murata-ps.com/support DMR30-TC1.A01 Page 7 of 10 DMR30-TC1 Series Thermocouple Temperature Meter MENU AND CONFIGURATION : (continued) • F RST – The Frst submenu resets the meter configuration to the factory default values. To reset the meter, scroll to the YES option using the button and then press the button to confirm. To quit this submenu without resetting the meter, press the button. MAIN MENU Item Units D Fmt TCsel Filt Alarm Factory Default Configuration Default Value DEG C AUTO TC J OFF OFF MAIN MENU Item Aset Ahyst Modes Mlock Default Value 0 0.0 ON OFF TECHNICAL NOTES (back to Rear Panel Connections) 1. Calibration The DMR30-DCV1 is calibrated at the factory at manufacture. There are no user or field-adjustable calibration features. 2. Wiring: Power supply and input wiring must be rated for the electrical and environmental conditions under which the meter will be operated. They must also comply with any regulatory or application-mandated requirements pertaining to the user’s installation. The terminal blocks can accommodate wire gauges ranging from #14 to #24 AWG. Wiring Insulation should be stripped to 6mm (0.24”). All wires must be inserted into the terminal block openings such that the screw terminal does not pinch any insulation. It is important to tighten all screw-terminals to their torque specification of 4.5 lbf-in (0.51Nm). Proper tightening will help ensure reliable operation. Applications subject to vibration should use stranded wire. After final assembly, inspect all terminal block connections for shorts between adjacent conductors; this step is especially important when using stranded wire. 3. Protection and Fusing: DMR30 meters’ power supply leads (+VS, -VS) are protected against momentary overvoltage and reverse polarity conditions. Input terminals +TC and -TC are protected against noise and brief voltage transients. Protection, however, is not provided against sustained conditions exceeding the limits listed in in the Performance & Functional Specifications Table. External fusing must be supplied by the user in accordance to applicable safety and regulatory requirements for the system in which the DMR30 is installed. 4. Noisy Power Supplies Some power supplies contain high-frequency switching devices that may conduct and/or radiate significant noise onto the low-level signal developed across the measurement inputs. Even though the DMR30 incorporates built-in input filtering, some portion of this noise may be amplified and subsequently measured by its sensitive input circuitry. Limiting runs of wire to