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Altek Process Calibrator TechChek 820 Manual

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    							Process Calibrator
    TechChek™ 820 
    						
    							1
    GENERAL INFORMATION
    Lighten your load by taking the TechChek to every site. It’s like
    bringing a cartload of test equipment from the shop to the control
    room or the field. The TechChek 820 sources & reads DC like a
    milliamp or voltage calibrator, simulates and measures T/Cs &
    RTDs like a temperature calibrator and generates and counts
    frequency & Counts-Per-Minute like a frequency calibrator. Your
    TechChek can also help you trouble shoot like a multimeter! It
    checks continuity and measures AC line voltage without carrying
    a seperate instrument.
    The TechChek 820 is easy to use. Select a function, choose a
    range, and turn the knob for the precise output you need. Plus,
    you can store three output values per range for instant recall with
    the QUIK-CHEK®
    switch.
    MILLIAMP CALIBRATION
    Use at every point in your 4 to 20 mA loop. You can Source &
    Read 0.00 to 24.00 mA, Simulate a Two-Wire Transmitter or the
    use the TechChek 820 to simultaneously Power & Measure your
    Two-Wire Transmitters.
    VOLTAGE CALIBRATION
    Calibrate all your DC millivolt and voltage instrumentation.Source
    from 0.00 to 110.00 mV and 0.00 to 10.25 V. Read up to 110.00 mV,
    11.00 V and 200.0 VDC.
    THERMOCOUPLE CALIBRATION
    Source and read directly in °C and °F for T/C types J, K, T & E with
    1° resolution. Cold junction compensation automatically adjusts
    for ambient temperature changes.
    RTD CALIBRATION
    Built-in Platinum 100 Ohm DIN/IEC 751 table displays in °C or °F.
    No more decade box and hard-to-read tables. Also reads and
    sources in Ohms.
    GENERAL OPERATING INSTRUCTIONS...........................3
    TURN ON .........................................................................3
    CONNECTIONS ...............................................................3
    TILT STAND......................................................................4
    CHANGING BATTERIES..................................................4
    RESTORING DEFAULT SETTINGS ................................5
    CONFIGURING TEMPERATURE SCALES ...............5
    ENABLING AUTO-OFF ..............................................5
    SELECTING RANGES .....................................................6
    SOURCE MODE OPERATING INSTRUCTIONS.................7
    STORING & RECALLING QUIK-CHEK
    ®OUTPUTS .......7
    SOURCE MODE CONNECTION INSTRUCTIONS
    CALIBRATE MILLIAMP INPUTS ................................8
    SIMULATE 2-WIRE TRANSMITTERS .......................9
    POWER & MEASURE 2-WIRE TRANSMITTERS ...10
    CALIBRATE VOLTAGE INPUTS...............................11
    CHECK 1-5 VOLT INPUTS WITHOUT
    DISCONNECTING WIRES .......................................12
    CALIBRATE THERMOCOUPLE INPUTS ................13
    CALIBRATE RESISTANCE INPUTS ........................14
    CALIBRATE RTD INPUTS .......................................15
    CALIBRATE FREQUENCY INPUTS ........................16
    READ MODE OPERATING INSTRUCTIONS....................17
    MIN/MAX ..................................................................17
    OUT OF RANGE SIGNALS......................................17
    READ MODE CONNECTION INSTRUCTIONS
    READ MILLIAMP OUTPUTS ....................................18
    READ VOLTAGE OUTPUTS ....................................19
    MEASURE THERMOCOUPLE SENSORS ..............20
    READ RESISTANCE ................................................21
    CHECK CONTINUITY ..............................................22
    MEASURE RTD SENSORS .....................................23
    COUNT FREQUENCIES ..........................................24
    READ AC  VOLTAGES ..............................................25
    SPECIFICATIONS...............................................................26
    WARRANTY........................................................................30
    CONTENTS 
    						
    							23
    OPERATING INSTRUCTIONS
    GENERAL
    TURN-ON
    Each time you turn on the TechChek 820
    the LCD will display all segments for about
    1 second. It then displays the most recent-
    ly selected Source or Read Setting.
    SOURCE - The three QUIK-CHEK outputs
    will be the same as previously stored. Each
    time a different function is selected, the
    three QUIK-CHEK outputs will be recalled. 
    READ - The 820 is ready to measure the
    same signal as the last time it was turned
    on and is automatically updating the MAX &
    MIN readings for recall at any time.
    CONNECTIONS
    TechChek 820 has protected banana jacks
    compatible with standard and safety
    banana plugs. Included with your
    TechChek are:a pair of safety test leads
    with test probes, safety alligator clips
    standard alligator clips and spade lugs for
    attachment to a wide variety of instruments.
    An additional safety test lead and spade lug
    are also included for 3-Wire RTD connections.
    Thermocouple connections are made
    through a miniature thermocouple socket. 
    Optional KIT-1 includes T/C wires for Type
    J, T, E & K with miniature T/C plugs (not
    included).
    To prevent accidently overloading the instrument being tested, it
    is important to correctly set up the outputs before connecting
    TechChek 820 to any instruments to be calibrated.
    !!
    1 4 52 3
    5V MAX
    INPUT 45V MAX
    INPUT
    !300V
    MAX
    INPUT
    45V
    MAX
    INPUT!T/C
    GENERAL INFORMATION
    FREQUENCY CALIBRATION
    Generate Zero Crossing square waves from 1 to 1000 Hz, 0.01 to
    10.00 kHz and from 1 to 1000 CPM (Counts-Per-Minute). Also
    measures as a frequency counter.
    MEASURE AC VOLTAGE
    Check your line voltage or mains from 0.0 to 250.0 volts AC. Great
    for troubleshooting power problems.
    CHECK CONTINUITY
    Locate pairs of wire, open connections and shorts with the built-in
    beeper.
    TECHNICIAN’S LEAD KIT
    Included with the TechChek 820 is a test lead kit which consists of
    three safety test leads with alligator clips, test probes and spade
    lugs.
    Rear Label - Condensed Operation Guide
    SOURCE & READ T/C TERMINALS FUNCTION–             +
    SOURCE 3-Wire RTD1–   4–2+
    READ 3-Wire RTD1+   2–3–
    READ Freq & VAC to 250V, VDC to 200V4–  5+
    READ mA, mVDC, Freq & VDC to 10.25V
    SIMULATE 2-Wire Transmitters4–  3+
    SOURCE mA, mV, V, Ω, 2-Wire RTD, Freq
    PWR/MEAS mA   READ Ω   CONTINUITY1–   2+
    !See manual
    for details. 
    						
    							GENERAL
    CONFIGURING TEMPERATURE SCALES
    The thermocouple and RTD ranges may be configured for full time
    use of °C, full time use of °F or selectable °C and °F operation.
    This configuration is part of the DEFAULT SETTINGS below.
    AUTO-OFF
    TechChek 820 can be set up to turn itself off after 30 minutes of
    inactivity. The internal timer is reset to 30 minutes each time the
    digital pot is turned or a pushbutton is pressed.
    DEFAULT SETTINGS
    TechChek 820 may be restored to the factory default setting. This
    will reset the HI and LO “QUIK-CHEK” memories according to the
    table below and the SET memory to midrange between HI and LO.
    OPERATING INSTRUCTIONS
    1) Press and hold the STORE/RESET push-button while turning
    the 820 on.
    2) Keep pressing the push-button until the display flashes (about
    5 seconds) then release.
    3) The °C & °F symbols will flash on the display.
    4) Press the RANGE/TYPE push-button to make your selection.
    With °C flashing the unit will only display in °C, With °F flash-
    ing the unit will only display in °F and with both flashing you can
    select °C and °F for each T/C & RTD type. °C/°F is selected if
    no push-buttons are pressed.
    5) After five seconds the 820 will automatically store your choice
    and the words BAT and ON will appear on the display indicat-
    ing that AUTO-OFF is selected.
    6) To toggle the AUTO-OFF function
    on and off press the RANGE/TYPE
    push-button and the words oN and
    oFF will display.
    7) After five seconds the 820 will
    automatically store your choice. 
    8) All segments on the LCD will remain
    displayed until the  820 has been
    reset.
    4
    OPERATING INSTRUCTIONS
    GENERAL
    FIELD & BENCH USE
    TechChek 820 comes with a carrying case
    and a built-in tilt stand/hanger. The 820 is
    held securely in the case by VELCRO® for
    use with the carrying case open. The carry-
    ing case also has a snap-on belt loop which
    can be looped around a pipe or rail.
    The tilt stand is easily raised by pulling the
    stand until it locks into place. The stand can
    also be reversed for use as a hanger to
    suspend the 820.
    AUTOCAL
    To maintain accuracy the TechChek period-
    ically recalibrates its measuring circuitry
    against internal references. While this is
    occuring the word CAL will appear on the
    display for less than 2 seconds. 
    CHANGING BATTERIES 
    Low battery is indicated by BAT on the
    display. Approximately four hours of opera-
    tion remain before the LCD blanks and
    TechChek 820 shuts itself down.  Turn the
    820 off, loosen the  captive screw securing
    the battery compartment and lift off the
    cover from the bottom of the case. The six
    “AA” batteries are easily removed and
    replaced (alkaline supplied and recom-
    mended). Replace the battery compartment
    cover by inserting the tabs and tightening
    the screw.
    5
    QUIK-CHEKDEFAULTSRANGE LO       SET HI
    mA 4.00    12.00   20.00
    mV 1.00     5.00   10.00
    V 1.00     5.00   10.00
    T/C All points 0°C/32°F
    Ohms      100.0   200.0  400.0
    RTD All points 0°C/32°F
    kHz 1.00    5.00   10.00
    Hz 100 500    1000
    CPM 100 500    1000
    CAL 
    						
    							7
    SOURCE MODE
    Select source by pressing the SOURCE/READ pushbutton until
    the word SOURCE appears on the LCD display.  To change the
    output value, turn the speed sensitive digital pot.  Turning the knob
    slowly will cause a gradual change in the output. A faster rate of
    change will occur when the knob is turned faster. This function
    operates in all three output positions (HI, SET & LO). 
    STORING QUIK-CHEK OUTPUTS
    1) Switch to HI or LO 
    2) Turn the knob to desired value
    3) Press the STORE push-button
    The LCD will flash once to show that the
    value was saved
    If a value is in the SET position and you
    want that value stored in HI or LO, press
    and hold the STORE push-button while
    moving the switch to HI or LO. The display
    will flash once to indicate the value has
    been stored. Then release the STORE
    push-button.
    RECALLING QUIK-CHEK OUTPUTS
    When you need a stored value just flip the
    QUIK-CHEK switch. Any value for the
    selected range may be stored in HI & LO.
    The TechChek 820 remembers the HI, LO
    and SET values for each function with the
    power on or off. Each time a different
    function is selected, the last three QUIK-
    CHEK values for that function will be
    recalled.
    OPERATING INSTRUCTIONS
    6
    OPERATING INSTRUCTIONS
    GENERAL
    SELECTING RANGES
    Press the RANGE/TYPE pushbutton to
    select the desired range and scale. 
    SOURCE RANGES
    Milliamp: mA, %mA, 2-Wire Sim, %2-Wire Sim, Pwr Xmtr, %Pwr Xmtr
    VDC: mV, V
    T/C: J°F, J°C, T°F, T°C, E°F, E°C, K°F, K°C
    Ohms: Ohms
    RTD: Pt °F, Pt °C
    Frequency: KHz, Hz, CPM
    READ RANGES
    Milliamp: mA, %mA
    VDC: mV, 10V, 200V
    T/C: J°F, J°C, T°F, T°C, E°F, E°C, K°F, K°C
    Ohms: Ohms, Continuity
    RTD: Pt °F, Pt °C
    Frequency: KHz, Hz, CPM
    VAC: VAC
    TURN OFF
    Press the POWER push-button to turn the
    820 off. If AUTO-OFF is enabled the 820
    will turn itself off after 30 minutes of inactiv-
    ity.
    RANGE/TYPE
    POWER
    STORE/RESET
    HI
    SET
    LO
    SOURCE 
    						
    							9
    OPERATING INSTRUCTIONS
    SIMULATE 2-WIRE TRANSMITTERS
    2-WIRE SIM mA, 2-WIRE SIM % (Percent of 4 to 20 mA) 
    Choose this function to simulate a 2-Wire Transmitter output from
    1.00 to 24.00 milliamps. Operates in loops with power supply
    voltages from 3 to 45 VDC.
    1) Disconnect existing 2-Wire Transmitter from the loop
    2) Connect the red SOURCE lead of the calibrator to the plus (+)
    input of the field connections and the black SOURCE lead to
    the minus (-)
    3) Repeatedly press the RANGE/TYPE push-button until the words
    SOURCE, 2-WIRE SIM and mA or SOURCE, 2-WIRE SIM and
    % are displayed.
    The simulated output of the 2-Wire Transmitter is continuously
    adjustable from 1.00 to 24.00 mA with the QUIK-CHEK switch in
    the SET position. Zero & Span (or any other values) are available
    by using the LO and HI QUIK-CHEKs.
    !!
    1 4 52 3
    5V MAX
    INPUT 45V MAX
    INPUT
    !
    300V
    MAX
    INPUT
    45V
    MAX
    INPUT!T/C
    +IN-
    REF +OUT-
    RED
    BLACK
    Power Supply
    2 to 45 VDC
    Receiver
    (Powers external
    2-Wire Transmitter)
    To
    Sensor
    Typical
    2-Wire
    Transmitter
    (Disconnected)
    8
    CALIBRATE MILLIAMP INPUTS
    mA, mA % (Percent of 4 to 20 mA)
    Choose this function to provide an output from 0.00 to 24.00
    milliamps. The compliance voltage is a nominal 25 VDC to provide
    the driving power to your milliamp receivers.
    1) Disconnect one or both input wires from the device to be
    calibrated.
    2) Connect the red SOURCE lead of the calibrator to the plus (+)
    input of the device and the black SOURCE lead to the minus (-).
    3) Repeatedly press the RANGE/TYPE push-button until the word
    SOURCE and mA or SOURCE and % are displayed.
    Output current is continuously adjustable with the QUIK-CHEK
    switch in the SET position. Zero & Span (or any other values) are
    available by using the LO and HI QUIK-CHEKs.
    OPERATING INSTRUCTIONS
    !!
    1 4 52 3
    5V MAX
    INPUT 45V MAX
    INPUT
    !
    300V
    MAX
    INPUT
    45V
    MAX
    INPUT!T/CMilliamp Receiver Input
    Controller
    Transmitter
    Computer
    Logger
    I/P
    DCS
    RED
    BLACK 
    						
    							11
    CALIBRATE VOLTAGE INPUTS
    V,  m V
    Choose this function to provide an output from 0.00 mV to 110.00
    mV and from 0.00 to 10.25 VDC. Source current is a nominal 20
    mA to provide the driving power to your voltage receivers.
    1) Disconnect one or both input wires from the device to be
    calibrated
    2) Connect the red SOURCE lead of the calibrator to the plus (+)
    input of the device and the black SOURCE lead to the minus (-)
    3) Press the RANGE/TYPE push-button to switch the display
    between mV and V.
    Output voltage is continuously adjustable with the QUIK-CHEK
    switch in the SET position. Zero & Span (or any other values) are
    available by using the LO and HI QUIK-CHEKs.
    OPERATING INSTRUCTIONS
    !!
    1 4 52 3
    5V MAX
    INPUT 45V MAX
    INPUT
    !
    300V
    MAX
    INPUT
    45V
    MAX
    INPUT!T/CVoltage Receiver Input
    Controller
    Transmitter
    Computer
    Logger
    DCSRED
    BLACK
    10
    OPERATING INSTRUCTIONS
    POWER & MEASURE 2-WIRE TRANSMITTERS
    PWR XMTR mA, PWR XMTR %
    Choose this function to simultaneously supply power to a 2-Wire
    transmitter while displaying the 4-20 mA output of the transmitter. 
    1) Disconnect one or both input wires from the 2-Wire Transmitter
    to be calibrated
    2) Connect the red SOURCE lead of the calibrator to the plus (+)
    input of the device and the black SOURCE lead to the minus (-)
    3) Connect an appropriate sensor or calibrator to the input of the
    2-Wire Transmitter
    3) Repeatedly press the RANGE/TYPE push-button until the words
    SOURCE, PWR XMTR and mA or SOURCE, PWR XMTR and
    % are displayed.
    TechChek 820 supplies a nominal 24 Volts DC at 24 mA to the 2-
    Wire transmitter. The current passed by the transmitter will be
    accurately displayed by the 820. Calibrate the Transmitter in the
    usual manner and disconnect the 820.
    +IN-
    REF +OUT-
    !!
    1 4 52 3
    5V MAX
    INPUT 45V MAX
    INPUT
    !
    300V
    MAX
    INPUT
    45V
    MAX
    INPUT!T/CRED
    BLACK
    Transmitter Input
    Sensor
    Process Signal
    Simulated InputTypical
    2-Wire
    Transmitter 
    						
    							13
    CALIBRATE THERMOCOUPLE INPUTS
    Choose this function to simulate a thermocouple signal into any
    instrument requiring a thermocouple input. The output of the 820
    is automatically cold junction compensated.
    1) Disconnect the thermocouple from the instrument being
    calibrated.
    2) Press the RANGE/TYPE push-button until the desired T/C type
    and temperature scale appear.
    3) Use a thermocouple wire and corresponding miniature thermo-
    couple connector to connect the TechChek 820 to the instru-
    ment.
    Output temperature is continuously adjustable with the QUIK-
    CHEK switch in the SET position. Zero & Span (or any other
    values) are available by using the LO and HI QUIK-CHEKs
    OPERATING INSTRUCTIONS
    !!
    T/C
    1 4
    52 3
    5V MAX
    INPUT 45V MAX
    INPUT
    !
    300V
    MAX
    INPUT
    45V
    MAX
    INPUT!+-
    Instrument withThermocouple Input
    Controller
    Temperature Indicator
    Temperature Trip or Alarm
    Temperature Transmitter
    12
    CHECK 1-5 VOLT INPUTSWITHOUT DISCONNECTING WIRES
    Most 1-5 Volt receivers in 4-20mA loops have a 250 Ohm resis-
    tor across the input of the receiver. This resistor may be mounted
    internally or externally. TechChek 820 is connected directly across
    the input of the 1-5 Volt receiver without disconnecting any field
    wiring. This saves a great deal of time when a large number of
    voltage receivers, such as chart recorders or computer systems,
    require calibration.
    Make certain that changing the signal input will not disturb the
    process or cause unexpected alarms when checking on-line
    instruments. It is important to remember the 820 drives only the
    device to which it is connected.It has no effect on other devices
    in the 4 to 20 mA loop. TechChek 820 will clamp the selected
    value in the mV and V Ranges to the maximum sink current of >16
    mA.
    1) Connect the red SOURCE lead of the calibrator to the plus (+)
    input of the device and the black SOURCE lead to the minus (-).
    OPERATING INSTRUCTIONS
    !!
    1 4 52 3
    5V MAX
    INPUT 45V MAX
    INPUT
    !
    300V
    MAX
    INPUT
    45V
    MAX
    INPUT!T/CRED
    BLACK
    CONTROLLER
    (TYPICAL)
    ADDITIONAL
    4-20 mA OR 1-5V
    INSTRUMENTS RECORDER
    COMPUTER
    LOGGER
    ETC,
    1-5V DC 250Ω
    +IN-
    REF +OUT-
    Typical
    2-Wire
    Transmitter 
    						
    							15
    CALIBRATE RTD INPUTS
    Choose this function to simulate a temperature signal into any
    instrument requiring an RTD input. 
    1) Disconnect the sensing RTD from the instrument being
    calibrated.
    2) Press the RANGE/TYPE push-button until the desired RTD
    type and temperature scale appear.
    3) Connect using 3 or 2 wires as in the diagrams below. Spade
    lugs are recommended to minimize any contact resistance. 
    Output temperature is continuously adjustable with the QUIK-
    CHEK switch in the SET position. Zero & Span (or any other
    values) are available by using the LO and HI QUIK-CHEK”
    positions.
    OPERATING INSTRUCTIONS
    !!
    1
    4 52 3
    5V MAX
    INPUT 45V MAX
    INPUT
    !
    300V
    MAX
    INPUT
    45V
    MAX
    INPUT!T/CRED
    BLACKBLACK
    Instrument withRTD Input
    Controller
    Temperature Transmitter
    Temperature Indicator
    Temperature Trip or Alarm
    !!
    1 4 52 3
    5V MAX
    INPUT 45V MAX
    INPUT
    !
    300V
    MAX
    INPUT
    45V
    MAX
    INPUT!T/CRED
    BLACK
    Receiver InputOhms or 2-Wire RTD
    Controller
    Transmitter
    Computer
    14
    CALIBRATE RESISTANCE INPUTS
    Choose this function to simulate a resistance into a variety of
    instruments. 
    1) Disconnect one or both input wires from the device to be
    calibrated.
    2) Connect the red SOURCE lead of the calibrator to the plus (+)
    input of the device and the black SOURCE lead to the minus (-). 
    OPERATING INSTRUCTIONS
    !!
    1 4 52 3
    5V MAX
    INPUT 45V MAX
    INPUT
    !
    300V
    MAX
    INPUT
    45V
    MAX
    INPUT!T/CRED
    BLACK
    Receiver InputOhms or 2-Wire RTD
    Controller
    Transmitter
    Computer
    Three Wire RTD Connection
    Two Wire RTD Connection 
    						
    							1716
    READ FUNCTIONS
    Select read by pressing the SOURCE/READ pushbutton until  the
    word READ appears on the LCD display. The READ functions
    measure the desired signal. Multiple scales are available for some
    functions. 
    MIN/MAX
    To read the Maximum or Minimum INPUT
    since READ mode was entered, simply
    switch to MAX or MIN. The value will
    appear on the LCD along with the word
    MAX or MIN. The MAX/MIN values are
    automatically updated and may be viewed
    at any time without disturbing the other
    values. 
    RESTARTING
    MIN/MAX
    Pressing the STORE/RESET push-button
    will cause the 820 to store the present
    reading into the MAX and MIN memories.
    Upon releasing the STORE/RESET push-
    button the 820 will resume reading the input
    and update the MAX & MIN values as the
    measured signal changes.
    OUT OF RANGE
    SIGNALS
    Signals above or below those available for
    the currently selected range will be indicat-
    ed by Or and Ur on the display.
    OPERATING INSTRUCTIONS
    CALIBRATE FREQUENCY INPUTS
    Choose this function to provide pulses into frequency measuring
    instruments. The 820 output is a zero crossing square wave from
    -1V to +5V amplitude. Available ranges are from 0.01 to 10.00
    kHz, 1 to 1000 Hz and from 1 to 1000 CPM (Counts-Per-Minute).
    CPM is used to simulate extremely slow frequency signals with
    greater resolution. For example, 10 Hz is equivalent to 600 CPM.
    To convert from CPM to Hz Divide by 60. To convert from Hz to
    CPM multiply by 60.
    1) Disconnect any input from the instrument being calibrated.
    2) Press the RANGE/TYPE push-button until the desired frequen-
    cy range appears.
    3) Connect the red SOURCE lead of the 820 to the plus (+) input of
    the device and the black SOURCE lead to the minus (-). 
    Output frequency is continuously adjustable with the QUIK-
    CHEK switch in the SET position. Zero & Span (or any other
    values) are available by using the LO and HI QUIK-CHEKs
    OPERATING INSTRUCTIONS
    !!
    1 4 52 3
    5V MAX
    INPUT 45V MAX
    INPUT
    !
    300V
    MAX
    INPUT
    45V
    MAX
    INPUT!T/CFrequency Receiver Input
    Flowmeter
    Controller
    Transmitter
    Computer
    Logger
    DCS
    RED
    BLACK
    MIN READMAX
    READ
    STORE/RESET 
    						
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