Ametek JOFRA ASC300 Reference Manual
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Ametek JOFRA ASC300 Reference Manual

Advanced signal calibrator
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Reference Manual
Advanced Signal Calibrator
AMETEK JOFRA ASC300
 Copyright 2005 AMETEK Denmark A/S

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Summary of Contents for Ametek JOFRA ASC300

  • Page 1 Reference Manual Advanced Signal Calibrator AMETEK JOFRA ASC300  Copyright 2005 AMETEK Denmark A/S...

  • Page 2: Table Of Contents

    1.1 Contacting Ametek ........

  • Page 3: Introduction

    1.21 Optional Rechargeable Battery Pack The ASC 300 can be operated from an optional rechargeable battery pack. This pack can be ordered by contacting Ametek using the above contact information. Please reference the following part numbers when ordering the optional battery pack and charger.

  • Page 4: Safety Information

    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 Double Insulated Electric Shock Fuse...
  • Page 5 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.
  • Page 6 • 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. •...

  • Page 7: Calibrator Interface

    2. Calibrator Interface Figure 1 shows the location of the input and output connections on the calibrator, while Table 1 describes their use. Figure 1. Input/Output Terminals Table 1: Input and Output Terminals Name Description 1, 2 Measure Isolated V, Input terminals for measuring current, mA terminals voltage, and supplying loop power.
  • Page 8 Figure 2 shows the location of the keys on the calibrator. Table 2 lists the functions of each key. Figure 2. Keypad Table 2. Key Functions Name Function Function Keys F1, F2, F3 Used to operate the menu bar at the bottom of the calibrator display.

  • Page 9: Main Display

    2.1 Main Display 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.

  • Page 10: Menu Bar

    Span 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%). Units 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) Sensor Types...
  • Page 11 between the 0% and 100% values in 25% increments. The[RAMP] function ramps the input between the 0% and 100% value and back again. The pulse home menu also has three active options, [MENU], [TRIG], and [COUNTS]. The [TRIG] and [COUNTS] options are used for pulse simulation.
  • Page 12 When the lower display is in the frequency or pulse mode, the frequency level menu is added after the auto output 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.
  • Page 13 Figure 4. The Menu Tree...

  • Page 14: Using Measure Modes (Lower Display)

    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.

  • Page 15: Measuring Temperature

    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 described in Specifications section. The calibrator also has a Cold Junction Compensation (CJC) function.

  • Page 16: Measuring Pressure

    3.3-2 Using Resistance-Temperature-Detectors (RTDs) The supported types of RTDs are shown in Section 8. Specifications. RTDs are characterized by their 0°C resistance, R0. 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: Switch to lower display [LOWER] from Main Menu.
  • Page 17 Caution To avoid mechanically damaging the pressure module, never apply more than 13.5 Nm/10 ftlbs. 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.

  • Page 18: Using Source Modes (Lower Display)

    3.4-1 Zeroing with Absolute Pressure Modules. To zero, adjust the calibrator to read a known pressure, such as barometric pressure. 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.

  • Page 19: Using Auto Output Functions

    4.1-1 Manually 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 Auto Output Functions The Auto Output functions, when selected replace the scrolling functions on the Source Home Menu.

  • Page 20: Sourcing Volts

    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.

  • Page 21: Sourcing A Pulse Train

    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.

  • Page 22: Sourcing 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.
  • Page 23 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.

  • Page 24: Using Isolated Measure Modes (Upper Display)

    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.

  • Page 25: Measuring Pressure

    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 5.3 Measuring Pressure Note: Pressure is not read from modules with frequency or pulse train mode enabled.

  • Page 26: Testing An Input Or Indicating Device

    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.

  • Page 27: Calibrating An I/P Device

    Figure 19. Connections for Testing an Output Device 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.

  • Page 28: Calibrating A Transmitter

    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.

  • Page 29: Remote Operation

    4. Zero the pressure module. 5. Test the transmitter at 0 % and 100 % of the span, and adjust as necessary. Figure 22. Calibrating a Pressure Transmitter 7. Remote Operation The calibrator can be remotely controlled using a PC terminal, or by a computer program running the calibrator in an automated system.

  • Page 30: Setting Up The Rs-232 Port For Remote Control

    7.1 Setting up the RS-232 Port for Remote Control Note: The RS-232 connection cable should not exceed 15m unless the load capacitance measured at connection points is less than 2500pF. Serial parameter values: 9600 baud 8 data bits 1 stop bit no parity Xon/Xoff EOL (End of Line) character or CR (Carriage Return) or both...

  • Page 31: Using Commands

    3. To switch back to local operation enter LOCAL at the terminal. This command also turns off LOCKOUT if it was on. For more information on commands refer to the Remote Commands section. 7.3 Using Commands 7.3-1 Command types Refer to the Section on Remote Commands for all available commands. The calibrator may be controlled using commands and queries.
  • Page 32 Numbers that have up to 15 significant figures and exponents. For example: CPRT_COEFA? returns 3.908000E-03 Character Response Data (CRD) Data returned as keywords. For example: RTD_TYPE? returns PT385_10 Indefinite ASCII (IAD) Any ASCII characters followed by a terminator. For example: *IDN? returns AMETEK, ASC300, 250, 1.00...
  • Page 33 7.3-4 Calibrator Status Status registers, enable registers, and queues provide status information on the calibrator. Each status register and queue has a summary bit in the Serial Poll Status Byte. Enable registers generate summary bits in the Serial Poll Status Byte. The following is a list of registers and queues along with their function.
  • Page 34 Power On. Set to 1 if power was turned on and off before the Event Status Register was read. Command Error. Set to 1 when the calibrator receives an invalid command. Entering an unsupported RTD type may cause such an error. Execution Error.

  • Page 35: Remote Commands And Error Codes

    FAULT? returns 0. The error queue is cleared when power is reset or when the clear command *CLS is entered. Input Buffer Calibrator stores all received data in the input buffer. The buffer holds 250 characters. The characters are processed on a first in, first out basis. 7.4 Remote Commands and Error Codes The following tables list all commands, and their descriptions, that are accepted by the calibrator.
  • Page 36 Table 6: Calibrator Commands Command Description CAL_START Puts the calibrator in calibration mode CJC_STATE Turns CJC on or off. CJC_STATE? Returns the state of the CJC CPRT_COEFA Sets the custom RTD coefficient A CPRT_COEFA? Returns the custom RTD coefficient A CPRT_COEFB Sets the custom RTD coefficient B CPRT_COEFB?
  • Page 37 Command Description REMOTE Puts the calibrator in remote mode RTD_TYPE Sets the RTD type RTD_TYPE? Returns the RTD type RTD_WIRE Sets the number of wires used by the RTD mode. RTD_WIRE? Returns the wire number setting used in the RTD mode Sets the output for mA simulation SIM? Returns the output of the mA simulation...
  • Page 38 Table 7: Parameter units Units Meaning milliamps of current Voltage in millivolts Voltage in volts Frequency in cycles per minute Frequency in Hertz Frequency in kiloHertz Ohms Resistance in Ohms Temperature in Celsius Temperature in Fahrenheit Pressure in pounds per square-inch InH2O4C Pressure in inches of water at 4°C InH2O20C...

  • Page 39: Entering Commands

    An unknown command was received An invalid RTD or TC parameter value was received The serial input buffer overflowed Too many entries in the command line The serial output buffer overflowed Output is overloaded Calibrator not in pulse train mode when TRIG was received An invalid FREQ_TYPE was received 7.5 Entering Commands Commands for the calibrator may be entered in upper or lower case.
  • Page 40 *IDN? Returns the manufacturer, model number, and firmware revision of the Calibrator. For example: *IDN? will return AMETEK, ASC300, 250, 1.00 *OPC Enables the Operation Complete setting in the ESR. This setting makes it possible to check if an operations is complete after it has been initialized.

  • Page 41: Cal_Start

    *STB Returns the status byte in decimal form from the Serial Poll Status Byte. For example; If 72 is returned, bits 6 and 3 are enabled. *WAI Prevents further remote commands from being executed until all previous commands are executed. For example: OUT 10 MA ;...

  • Page 42: Cprt_Coefa

    CPRT_COEFA? Returns the number which was entered for the first coefficient of the polynomial used in the custom RTD. Using the example above CPRT_COEFA? Would return: 3.9083E-3 CPRT_COEFB This command is used for entering a custom RTD into the calibrator. The numeric value entered after the command will be set as the second coefficient of the polynomial used by the custom RTD.

  • Page 43: Cprt_Max_T

    CPRT_MIN_T -260 CEL enters -260°C as the minimum temperature. CPRT_MIN_T? Returns the value entered for minimum temperature in the range for a custom RTD. Note that the Calibrator always returns numbers in scientific notation. The above example would return: -2.600000E+02, CEL CPRT_MAX_T Sets the maximum temperature of the custom RTD range.

  • Page 44: Fault

    FAULT? Returns the error code number of an error that has occurred. The command may be entered when the previous command did not do what it was meant to do. For example, if a value for current output is entered that is bigger than the supported range (0-24mA) FAULT? Would return: 103 which is the code number for an entry over range.

  • Page 45: Freq_Unit

    FREQ_UNIT Sets the unit for frequency. There are three ranges of frequencies for frequency and pulse modes, CPM (cycles per minute), Hz, and kHz. Use this command to select the right range. For example: FREQ_UNIT HZ sets the frequency to Hz range FREQ_UNIT? Returns the frequency unit currently being used by the frequency and pulse modes.

  • Page 46: Pres

    PRES? Returns the model and serial number of the attached pressure unit. Returns NONE if no pressure unit is attached. For example: PRES? Will return AMETEK,001PNS,3,0 PRES_UNIT? Returns the pressure units of both the upper and the lower display. For...
  • Page 47 RTD_TYPE Sets the RTD type. The following is a list of RTD types they way they should be entered after the command: P10(90)385 P50(90) 385 P100(90)385 P200(90)385 P400(90)385 P500(90)385 P1K(90)385 P50(90)391 P100(90)391 P100(90)392 M10(90)427 M50(90)428 M100(90)428 H120(90)672 P100(90)JIS YSI(90)400 OHMS CUSTOM For example: RTD_TYPE P10(90)385 sets RTD type to Pt385-10...

  • Page 48: Tc_Type

    TC_TYPE Sets the type of the thermocouple. All available types are shown in the TC Types table in Section 8. (Specifications). For example: TC_TYPE B sets thermocouple type to B TC_TYPE? Returns the type of thermocouple the calibrator is set to. TEMP_UNIT Sets the temperature unit for sourcing and measuring RTD and TC.

  • Page 49: Tsens_Type

    TSENS_TYPE? Returns the type of sensor that is currently set to measure temperature, either TC or RTD. UPPER_MEAS Sets the measuring mode for the upper display. After the command enter DCI for mA, DCI_LOOP for mA with loop power, DCV for volts, and PRESSURE for pressure.

  • Page 50: Specifications

    8. Specifications All measurements apply at 23°C ± 5°C. unless specified otherwise. Outside of this range the stability of the measurements is ± 0.005%of reading/°C. Table 9: General Specifications Operating Temperature -10°C to 50° Storage Temperature -20°C to 70°C Power 4 X AA batteries Low battery warning Serial Communications...
  • Page 51 Table 13: Resistance Measurement Range Accuracy (% of reading ± floor) Ohms low 0.00 - 400.0 0.025% ± 0.05 Ohms high 401.0 - 4000.0 0.025% ± 0.5 Table 14: Resistance Source Range (IE)Excitation Current Accuracy (% of reading ± floor) Ohms low - 400.0 0.1mA - 0.5mA...
  • Page 52 TC type Range (°C) Accuracy 0.0 - 1000.0 1000.0 - 2316.0 -200.0 - 800.0 0.0 - 800.0 800.0 - 2500.0 -200.0 - 0.0 0.45 0.0 - 900.0 -200.0 - 0.0 0.0 - 600.0 0.45 -200.0 - 0.0 0.0 - 1300.0 All TC errors include CJC errors CJC error outside of 23 ±...
  • Page 53 P500(90)385 -200.0 - 100.0 100.0 - 300.0 300.0 - 630.0 P1K(90)385 -200.0 - 100.0 100.0 - 300.0 300.0 - 630.0 P50(90)391 -200.0 - 100.0 100.0 - 300.0 300.0 - 600.0 600.0 - 800.0 P100(90)391 -200.0 - 100.0 100.0 - 300.0 300.0 - 600.0 600.0 - 800.0 P100(90)392...

  • Page 54: Maintenance

    9. Maintenance 9.1 Replacing Batteries Replace batteries as soon as the battery indicator turns on to avoid false measurements. If the batteries discharge too deeply the ASC 300 will automatically shut down to avoid battery leakage. Note: Use only AA size alkaline batteries or optional rechargeable battery pack.
  • Page 55 9.4 Replacement Parts & Accessories SPK-ASC-001 Operating Manual SPK-ASC-002 Rechargeable battery pack SPK-ASC-003 Charger 115/230 VAC SPK-HHC-001 Soft carrying case for the large handheld models including shoulder strap 124004 Shoulder strap 2206011 Wire adapter kit - Type K thermocouple 2206012 Wire adapter kit - Type T thermocouple 104203 Test lead set...
  • Page 56 AMETEK is a leading global manufacturer of electrical and electromechanical products for niche markets. Listed on the New York Stock Exchange (AME) since 1930. AMETEK’s annual sales exceed $1 billion. Operations are in North America, Europe, and Asia, with about one third of sales to markets outside the United States.

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