Related Manuals for Meatest M143
Summary of Contents for Meatest M143
- Page 5 Multifunction calibrator M142 is calibrator of electric quantities for application in calibration laboratories and in production lines where voltage, current, resistance, capacity and frequency meters are manufactured. Load capacity of the voltage output is 30 mA - enough for most high-consumption analogue power-meters.
- Page 6 Display is divided into several sections with following meaning: 1. Main field - Main value. Can be edited via numerical input or cursor keys or rotary. Symbol on the right represents signal shape. 2. Time field - displays time 3. Information field - In the field some additional information are displayed: Output terminals - Symbol of output ON (rectangle symbol) or output OFF.
- Page 7 2. Fan outlet cover 3. Power cord module 4. Grounding post 5. GPIB connector (optional) 6. RS-232 connector Every M143 Portable Multifunction Calibrator delivery includes following items: - USB stick with user manual 1 pc - Factory calibration certificate 1 pc...
- Page 8 - Data bits - Stop bits - Parity None - Handshake (XON/XOFF) Off - GPIB Address according to MENU ->GPIB Address (2 by default) (option) See M143 SCPI manual for complete SCPI reference, more details on communication setup and troubleshooting.
- Page 9 Inspect package contents when unboxing the calibrator for the first time. See chapter 1.3 for complete list of accessories. Place the instrument on a level surface before powering on and let it stabilize for at least one hour if the instrument has been stored outside of reference temperatures beforehand.
- Page 10 The calibrator is designed for operation from 115/230 V – 50/60 Hz power line voltage. Before the first connecting the calibrator to the mains, check the position of the mains voltage selector located at the rear panel. If the set voltage differs from your power line voltage power line selector must be switched over as described below: - Insert flat end of a screwdriver to the slot in power line socket on the rear panel.
- Page 11 Calibrator output can be turned on by pushing OPER button. Pressing it again turns output off. Output turns off automatically on calibrator startup and function switch. Output state is indicated by LED light above OPER button as well as rectangle on the top right side of the display when output is ON. When output is off - symbol OFF will be in that place instead.
- Page 12 Multifunction calibrator allows other, less frequently used parameters to be set. Setup menu is used to set these parameters. Setup menu is opened by pressing MENU display button. If output terminals are connected, they are disconnected and the following display appears: Coil x50 .
- Page 13 Calibration menu contains internal calibration constants and other tools for device adjustment and is therefore password protected. See chapter 6 for more details on M143 adjustment.
- Page 14 The multifunction calibrator provides calibrated DC and AC voltage. Output terminals for voltage ranges are labeled “ Hi “ and “ Lo “ at the front panel. Depending on the setting of the calibrator, voltage up to 1000 V can be present at the terminals. Real voltage ranges are as follows: DC voltage range from 0 to 1000 V.
- Page 15 If L terminal of device under test is not grounded it is recommended to ground Lo terminal on the calibrator GND ON, see chapter SETUP MENU. Connect voltage input of the multimeter to the M143/143i voltage output: The multifunction calibrator provides calibrated DC and AC current. Output terminals for voltage ranges are labeled “+I“...
- Page 16 AC/DC current function, especially at range 20A. Note: M143 can supply external load for limited period in range 10A to 20A.Default period is 5 minutes at 20 A and 15 minute at 10 A. It can vary depending on previous load conditions.
- Page 17 Optional current coil can extend the calibrator’s current range to 1000 A. The coil can be used for calibration of both DC and AC ammeters. The clamps of the ammeter must be positioned in angle 90 to the coil. When using the current coil, no steel or other magnetic objects must be present in the vicinity (50 cm) of the current coil, as they would deform the magnetic field and cause big calibration error.
- Page 18 When non-harmonic output shape is selected, the display shows additional information: - Besides the main amplitude data, „pk“ index is displayed, notifying that the displayed main value is the peak value. - Symbol which displays the shape of the output signal is displayed. 10.0000 Vpk Λ...
- Page 19 Multifunction calibrator can generate square wave TTL leveled signal with 4 digit resolution frequency. The signal is available in frequency mode on output terminals Hi – Lo. Frequency range is from 0.1 Hz to 2 MHz. Output waveform in frequency mode is always square wave with TTL amplitude 0 – 5 V. - Press FUNC button and select frequency mode.
- Page 20 - Press FUNC button on the calibrator and select RTD sensor simulation function. The display shows following data: main data of temperature in °C or K sensor type thermocouples: Pt or Ni set value of absolute deviation in %, labeled T = xxxx.x °C (K) the auxiliary section shows: temperature scale type accuracy of simulated temperature value of selected temperature sensor type...
- Page 21 When thermocouples are simulated, the simulated voltage corresponding to set temperature, sensor type and temperature of cold end of thermocouple is connected to Hi - Lo terminals. -250 to +1820 °C depending on simulated sensor type Temperature setting range: Sensor types: M, R, S, B, J, T, E, K, N, C, D, G2 Temperature scale: ITS 90, PTS 68...
- Page 22 - Open SETUP menu by pushing the button MENU. With cursor buttons , select position RJ Temp. and with display buttons select parameter FIXED. - Press FUNC button and select TC simulation function. - Push the button SEL until symbol [ _ _ _ _ _ _ _ ] appears under the RJ value. RJ value has form RJ = xxxx.x °C.
- Page 23 1. Place the calibrator to the standard condition and let it switched on for at least one hour in a laboratory in reference conditions. 2. Set GND item in M143’s Setup menu to ON in order to suppress mains noise during measurement. Use toroidal chokes to suppress ground loop noise if needed.
- Page 26 Adjustment is done through MENU > Calib. This menu item is password protected, default factory set calibration code is “000000”. Local Set Calibration code 0 0 0 0 0 0 ] Note: If an attempt is made to access the calibration procedure within 60 minutes after the calibrator was switched on, the calibrator refuses to open the calibration menu.
- Page 27 Moreover, the display shows the range which is being calibrated (RANGE), and the value to be set at the external standard multimeter (VALUE). Use , , , cursor buttons to set such main value on the display, when the output signal measured by external standard multimeter reaches the required calibration point.
- Page 28 ACV function calibration is possible also on another set frequency. Specification in whole frequency range is guaranteed only when recommended frequency is used. To calibrate AC Voltage and AC current function is possible also at another set frequency. Specification in whole frequency range is guaranteed only when recommended frequency is used. 0 Ω, 1 Ω, 10 Ω, 100 Ω, 1 kΩ, 10 kΩ, 100 kΩ, Fixed resistance nominals: 1 MΩ, 10 MΩ, 100 MΩ, 1 GΩ...
- Page 29 External temperature sensor should be inserted into temperature chamber with defined temperature. In column Tolerance requested accuracy of measurement of the resistance segment is shown. Standard multimeter has to be connected in four terminal connection (4W) to the output terminals Hi-Lo for values bellow 10 kΩ...
- Page 30 This chapter explains how to perform the routine maintenance to keep your device in optimal operating conditions. The calibrator includes a fuse located in the mains connector at the rear panel. Replace the fuse as follows: 1. Switch off the calibrator 2.
- Page 32 Bellow shown accuracy is valid after specified warm-up time in temperature range 23 ± 2 °C. The accuracy includes long-term stability, temperature coefficient, linearity, load and line regulation and the traceability of factory and National calibration standards. Specified accuracy is valid for one year after the last calibration.
- Page 33 0.0000 mV – 1000.00 V DCV range summary: – 1000.00 V ACV range summary: 1.0000 mV Voltage ranges: 100 mV, 1 V, 10 V, 100 V, 1000 V Frequency range in AC mode: 1 mV – 10 V from 20 Hz to 10 kHz, 10 V –...
- Page 34 DCI/ACI Range summary: M143: 0.000 A – 2.0000 A DC, 1.000 A – 2.0000 A AC M143i: 200 µA, 2 mA, 20 mA, 200 mA, 2 A (20 A in model M143) Internal ranges: 5½ digit Current resolution: M143/143i: 1 µA - 2A range 20 Hz to 1 kHz...
- Page 35 Number of resistances: 10 Ω to 100 M Ω Range: Calibration value resolution: 5 digits Maximal test voltage: 50 V or 0.1W, what is lower Type of connection: two-terminal Sensor types: RTDs, thermocouples TC sensor types: R, S, B, J, T, E, K, N, C, D, G2, M Temperature range summary: -250.0 °C to +1820.0 °C (by sensor type) fixed in range - 5.0 °C to 50.0 °C Cold junction comp.
- Page 36 RTD sensor types: Pt 1.385, Pt 1.392, Ni -50.0 °C to +850.0 °C depending on sensor type RTD range summary: 100 Ω to 1000 Ω Range of R0 coefficient: Type of connection: four-terminal Temperature scale: IPTS68, ITS90 °C, °F Temperature units: 0.1 °C/°F Resolution: Waveform type:...
- Page 38 According to EN ISO/IEC 17050-1:2010 standard as well as 2014/30/EU and 2014/35/EU directives of European Parliament and European Council, MEATEST, spol. s r. o., manufacturer of Portable Multifunction Calibrator M143/143i based in Železná 3, 619 00 Brno, Czech Republic, declares that its product conforms to following specifications: - EN 61010-1 ed.
Need help?
Do you have a question about the M143 and is the answer not in the manual?
Questions and answers