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Presys MCS-12-IS Technical Manual

Universal process calibrator
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Universal
Process
Calibrator
MCS- 12-IS
TECHNICAL MANUAL

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Summary of Contents for Presys MCS-12-IS

  • Page 1 ® Universal Process Calibrator MCS- 12-IS TECHNICAL MANUAL...
  • Page 2 IMPORTANT INSTRUCTIONS: • This manual contains instructions for the MCS-12-IS (in the rest of the manual called by calibrator) designed for use in hazardous areas. Read the entire manual before using the calibrator. Before using the calibrator, carefully read the section “Special conditions for safe use”.

  • Page 3: Table Of Contents

    Table Of Contents Marking details................................ 3 Special conditions for safe use ..........................4 1 - Introduction ................................ 5 1.1. General Description ............................5 1.2. Specifications – Inputs ..........................6 1.3. Specifications – Outputs ..........................9 2 - Operation................................. 14 2.1. Parts Identification ............................14 2.2.
  • Page 4 2.10. MEM Command ............................47 2.11. Warning Messages ........................... 48 3 - Adjustment ..............................49 3.1. Input adjustment (IN)........................... 50 3.2. Output adjustment (OUT) ..........................52 Notes..................................56...

  • Page 5: Marking Details

    MCS-12-IS Marking details Note: The Ex Compliance Certificate is sent with the instrument and its accessories.

  • Page 6: Special Conditions For Safe Use

    • The battery should only be charged in a safe area, using the charger provided. To avoid explosion or fire, use only the battery (BT12-IS) and charger (CG12-IS) specified by Presys. • Never replace the battery in a hazardous area.

  • Page 7: Introduction

    1 - Introduction 1.1. General Description MCS-12-IS is a universal process calibrator designed to be used in hazardous areas where explosive or flammable vapors are present. Enables the measurement and generation of signals used in Instrumentation and Process Control. It is designed to provide the necessary resources in order to facilitate the work of keeping the instruments of the process adjusted and calibrated.

  • Page 8: Specifications - Inputs

    1.2. Specifications – Inputs Input Ranges Resolution Accuracy Remarks > 10 M millivolt -150 to 150 mV 0.001 mV  0.01 % FS* input auto-ranging 150 to 2050 mV 0.01 mV  0.02 % FS volt -0.5 to 11 V 0.0001 V ...
  • Page 9 Input Ranges Resolution Accuracy Remarks Pt-100 -200 to 850 C / -328 to 1562 F 0.01 C / 0.01 °F  0.2 C /  0.4 F IEC-60751 Pt-1000 -200 to 280 C / -328 to 1562 F 0.1 C / 0.1 °F ...
  • Page 10 Input Ranges Resolution Accuracy Remarks TC-B 50 to 250 C / 122 to 482 F 0.1 C / 0.1 F  2.5 C /  5.0 F IEC-60584 250 to 500 C / 482 to 932 F 0.1 C / 0.1 F ...

  • Page 11: Specifications - Outputs

    1.3. Specifications – Outputs Output Ranges Resolution Accuracy Remarks < 0.3  millivolt -10 to 110 mV 0.001 mV  0.02 % FS < 0.3  volt 0 to 12 V 0.0001 V  0.02 % FS = 450  mA 0 to 22 mA 0.0001 mA ...
  • Page 12 Output Ranges Resolution Accuracy Remarks TC-J -210 to 1200 C / -346 to 2192 F 0.1 C / 0.1 F  0.4 C / 0.8 F IEC-60584 0.1 C / 0.1 F TC-K -270 to -150 C / -454 to -238 F ...
  • Page 13 Output Ranges Resolution Accuracy Remarks 0.1 C / 0.1 F TC-R -50 to 300 C / -58 to 572 F  2.0 C / 4.0 F IEC-60584 0.1 C / 0.1 F 300 to 1760 C / 572 to 3200 F ...
  • Page 14 Independent input for RTD (Probe). Probe is a high accuracy 4-wire Pt100 available under previous consult. For a higher level of accuracy, it is possible to configure the parameters of the sensor Callendar-Van Dusen curve in the MCS-12-IS, correcting the errors found in the sensor certificate (see section 3.8.3 - Probe). Software Special Functions - Any output programmable in: 1) STEP: 10%, 20%, 25% or up to 11 programmable setpoints via key or adjustable time.
  • Page 15 Measures 2, 3 and 4-wire RTDs. Transmitter Power Supply: 12 Vcc / 22 mA. 15V (open) / 30 mA (short circuit) – nominal. 50 Vdc In/Out isolation. Five-minute warm-up time. Operating temperature range: 0 to 50 C. Relative humidity: 90% RH non-condensing. Rechargeable batteries, up to 8 hours of operation, depending on the functions used.

  • Page 16: Operation

    2 - Operation 2.1. Parts Identification Front panel Fig. 01 - Front Panel...
  • Page 17 Left side-view panel Right side-view panel Fig. 02 - Side Panels...
  • Page 18 Ways to use the transport bag Fig. 03 - Ways to use the transport bag Accessories: The bag has two compartments; one is used to house the calibrator and the other is used to keep several accessories such as probes, adaptor to connect thermocouple wires, spare fuse, straps for transport and use in the field, and also the technical manual.

  • Page 19: Battery And Charger

    The battery should only be charged in a safe area. Only the charger (CG12-IS) and battery (BT12-IS) specified by Presys must be used, otherwise there is a risk of fire or explosion.
  • Page 20 After the self-test is completed, the display shows the starting menu:  IN EXEC CONF IN / OUT - Selects the input/output functions ADJ - Selects functions which adjust the calibrator itself (see chapter Adjustment). Do not enter in ADJ option before reading the warning in section 4 - Adjustment. COM - Refers to the communication with the computer, described in an appropriate manual.
  • Page 21 DATE updates the internal date and time of the calibrator. Thus, when it performs a calibration previously programmed by the software ISOPLAN, calibration data is recorded together with their date and time of occurrence. Whenever the calibrator is turned off, these data are not updated any longer. Thus, if you want the date and time to be recorded together with the calibration, one should update these data either by means of the keyboard or automatically via the software ISOPLAN.

  • Page 22: Measurement Or Input Functions

    2.4. Measurement or input functions Select the type of the signal to be measured by using the menus and use the corresponding terminals: Selects the input function and the ENTER key should be pressed.  V Press ENTER to select volt measurement; press , ,  and ➔ to select another signal. IN = x.xxxx V Display indicates volt input.
  • Page 23 For RTD (thermo-resistance), you must select the type and connection for the 2-, 3- or 4-wire options. In option F, you may select input as a frequency (Hz) or the input as a counting (COUNTER). If the input is selected as a counting, you must also configure the time indicated by TIME parameter. If TIME is set to zero, the pulses received at the input are counted continuously.
  • Page 24 The OP option refers to the possible optional modules for calibrator and belongs to both calibrator input (IN) and output (OUT). Pressing ENTER after selecting OP takes to the sub-menu:  Probe Probe is related to temperature measurement with an optional 4-wire Pt100 probe. When using the Probe, temperatures ranging from –...
  • Page 25 b) Input or measurement connections Fig. 04 - Input Connections...
  • Page 26 Fig. 04 - (Cont.) Input Connections...
  • Page 27 Fig. 04 - (Cont.) Input Connections...
  • Page 28 mA input with TPS supply (Ex 2-wire transmitter) Fig. 04 - (Cont.) Input Connections...
  • Page 29 c) Probe Connection (optional) Connect the Probe to calibrator so that polarity identification (white mark) coincides. Refer to figure below. Fig. 05 - Probe Connection...

  • Page 30: Generation Or Output Functions

    2.5. Generation or Output Functions Select through the menus the type of signal to be generated and use the corresponding terminals: a) OUT Selects the output functions.  V Press ENTER to select volt generation, press , ,  and ➔ to select another signal. OUT = x.xxxx V Display indicates the output value in volts.
  • Page 31 b) Output or generation connections Fig. 06 - Output Connections...
  • Page 32 Fig. 06 - (Cont.) Output Connections...
  • Page 33 NOTE: There is no polarity for resistance output. Fig. 06 - (Cont.) Output Connections...

  • Page 34: Available Power Supplies

    2.6. Available power supplies The calibrator has two power supplies galvanically isolated: TPS and +12 Vdc at the output, both provided with short-circuit protection (current limited to 30 mA, open circuit voltage of 15V). Fig. 07 - Power Supply...

  • Page 35: Calibration Examples

    2.7. Calibration examples a) Calibration of a temperature transmitter with RTD input and 4-20 mA output. Through the menus, the calibrator is configured for mA input and RTD output. TPS, which stands for Transmitter Power Supply, is a 12 Vdc power supply (rated voltage, which may vary depending on the load) which feeds power to transmitter.
  • Page 36 b) Calibration of a four-wire temperature transmitter with thermocouple input (TC) and 1-5 Vdc output. Is configured for volt input and TC output (the type of TC should be selected). For the cold junction compensation, you may use the TC compensation wires to set up the connection between the transmitter and the calibrator and program the option for automatic cold junction (Internal), or you may measure the temperature of the transmitter terminal set and then enter this value into the calibrator Manual option, thus avoiding the use of compensation wires.

  • Page 37: Special Programming

    2.8. Special Programming When PRG is selected, the display will show:  INPUT OUTPUT This option allows you to select a number of special programming features for INPUT or OUTPUT. INPUT is provided with FILTER, DECIMAL and PROBE options. OUTPUT is provided with STEP and RAMP options. 2.8.1.

  • Page 38: Probe

    2.8.3. Probe The PROBE option is used to configure the parameters using the Callendar-Van Dusen curve. Entering this menu, the options will appear. IEC751  CUSTOM The IEC751 option contains the standard table for conversion between resistance and temperature, according to the IEC-60751 standard. When not using a custom correction curve, leave this option selected. The CUSTOM option allows the configuration of CVD parameters.

  • Page 39: Step Programming

    2.8.4. STEP Programming The STEP programming makes the calibrator output vary in pre-defined steps. It is useful in calibrations where some scale points are verified; for example 0% - 25% - 50% - 75% - 100%. The output type must be previously configured, otherwise the Select OUTPUT first message is shown. In this case, press C/CE to go back to the main menu in order to select the input type.

  • Page 40: Ramp Programming

    2.8.5. RAMP Programming By using this programming, the calibrator output varies automatically, thus producing ramps and level marks which may be programmed to actuate once or continuously. The output type must be previously configured, otherwise the Select OUTPUT first message is shown. In this case, press C/CE to go back to the main menu in order to select the input type.

  • Page 41: Special Functions

    2.9. Special Functions Selecting FN the display will show:  INPUT OUTPUT With these options, you may select special functions related to the INPUT or the OUTPUT. INPUT has the SCALE, CAL and NO options. The input type must be previously configured, otherwise the Select INPUT first message is shown. In this case, press C/CE to go back to the main menu in order to select the input type.

  • Page 42: Scale Function

    2.9.1. SCALE Function It establishes a linear relationship between the calibrator input signal and what is shown at the display, according to the graphic below. ³ The scaled indication at the display (#) may represent any engineering unit, such as: m/s, m /s, %, etc.

  • Page 43: Cal Function

    For the current input, a linear relationship may be established as it has been previously shown or it may be squared (FLOW) as illustrated below: Fig. 11 - SCALE Function (FLOW). 2.9.2. CAL Function The calibrator may be used to calibrate or adjust any transmitter type. In a typical application, it would generate a thermoresistance signal and would measure the output signal in the current input.
  • Page 44 To activate this function, simply fill in the four parameters shown in the graphic below. To access these parameters, press ENTER after CAL is indicated in the display. Fig. 12 - CAL Function (LINEAR). Note that when the CAL function is active, the display will indicate CAL instead of IN as illustrated as follows: CAL = 500.23 °C OUT = 500.00 °C...
  • Page 45 To disable the SCALE or CAL functions, simply select the NO option from the menu below and press ENTER. SCALE  NO OUTPUT has the SCALE, CONV and NO options described as follows. The output type must be previously configured, otherwise the Select OUTPUT first message is shown. In this case, press C/CE to go back to the main menu in order to select the input type.

  • Page 46: Scale Function

    2.9.3. SCALE Function The scaling of the calibrator output allows it to simulate the functioning of a transmitter. Transmitter input is made directly by keyboard, and one can get any signal generated by the calibrator as the output signal. SCALE output function relates the output signal generated by the calibrator to the value shown on display, according to the figure below: ³...
  • Page 47 Scale Dec parameter configures the number of decimals presented at the display. The value of Output High must always be higher than Output Low. Scale Low and Scale High parameters may have any relationship between them, provided that they are different. Thus direct or reverse relationships may be established.

  • Page 48: Conv Function

    2.9.4. CONV Function By using the CONV function, the calibrator may convert any input signal into any output signal with galvanic isolation. It may therefore behave as a real transmitter. Once the calibrator input and output have been selected, you must fill in the four parameters shown in the graphic below.

  • Page 49: Mem Command

    SCALE and CONV functions may be disabled by selecting the NO option and pressing ENTER, as shown below: SCALE CONV  NO 2.10. MEM Command The calibrator accepts a great amount of programmations and special functions that can be often used. In this case, storage of these configurations in the calibrator saves time.

  • Page 50: Warning Messages

    When you want to clear all eight memory locations, select CLEAR ALL and press ENTER. 2.11. Warning Messages Warning Meaning Procedure RAM ERROR Problem in Turn the calibrator off and on. If the READ MANUAL RAM memory error persists, send the instrument to the factory EEPROM ERROR Problem in...

  • Page 51: Adjustment

    3 - Adjustment Warning: Enter the following options only after understanding them completely. Otherwise, it may be necessary to return the instrument to the factory for readjustment. Select ADJ option from the main menu and press the ENTER key. You should then enter the PASSWORD 9875 to access the adjustment menu.

  • Page 52: Input Adjustment (In)

    3.1. Input adjustment (IN) Select the corresponding mnemonic and apply the signals presented in the tables below. When adjusting inputs, the display shows on the 2 line the value measured by and on the first line the same value is expressed as a percentage. Note that the applied signals just need to be close to values shown in the table.
  • Page 53 a) Application of mV signal: For the adjustment below, leave terminals RTD3(+) and RTD4(+) short-circuited mV Signal Terminals point point V_OHM3 RTD3(+) e GND IN (-) 30.000 mV 40.000 mV V_OHM4 RTD4(+) e GND IN (-) 30.000 mV 40.000 mV b) Application of Standart Resistors: Connect a decade-box or standard resistors on terminals RTD1, RTD2, RTD3 and RTD4 (4-wire connection).

  • Page 54: Output Adjustment (Out)

    3.2. Output adjustment (OUT) The output adjustment (except for CJC and Probe) is performed in STEPS. For each STEP the calibrator outputs a signal of the same type selected which must be measured and stored. It is also possible to make a simple verification in the last two STEPS of each selected range, further details will be given below.
  • Page 55 STEP 4 STEP 5 0.00000 V 11.00000 V 0.000 mV 110.000 mV 0.00000 mA 11.0000 mA 2) OHM Due to accuracy reasons, the resistance output must be adjusted using 4-wire resistance reading method see figure 5 (H). Initially, the polarity of the wires is not important as the excitation current can flow in one or the other direction - from RTD1 to RTD2 terminal or from RTD2 to RTD1 terminal.
  • Page 56 Probe adjustment First identify the connector pins for Probe input according to the figure below. Fig. 16 - PROBE input connector...
  • Page 57 The PROBE adjustment is performed in two steps: a) Application of mV signal: mV Signal Terminals Bornes point point RTD2(+)* GND OUT (-) 100.000mV 120.000 mV RTD2(+)* GND OUT (-) 120.000mV 600.00 mV (*) RTD2, for PROBE adjustment, refers to the drawing shown above. b) Application of standard resistors: Connect a decade box or standard resistor to the probe connector, at positions RTD1, RTD2, RTD3 and RTD4, as shown above.

  • Page 58: Notes

    Notes Adjusting procedures for this calibrator must be performed under the reference conditions of temperature and • humidity. • Better calibration results are achieved if warm-up time is at least two hours and if the battery charger remains disconnected from the calibrator since one hour before its usage. •...
  • Page 59 Presys Presys | Instruments Inc. www.presys.com.br...

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