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Altek Model 934 Milliamp Voltage Loop Calibrator Manual

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    							6
    OPERATING INSTRUCTIONS
    ENABLING ADDITIONAL RANGES & FUNCTIONS
    The Model 934 has two additional ranges for displaying % DP
    Flow and Engineering Units. Additional  functions are AUTO-
    CHEK (automatic stepping of outputs) and AUTO-OFF.
    These ranges & functions are enabled by configuring DIP
    Switches (see next page). After the functions are enabled they
    are available as selections during setup (see OPERATING
    INSTRUCTIONS, SOURCE or READ).
    AUTO-OFF
    The Model 934 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.
    % DP FLOW
    Check out the signal generated by DP (differential pressure)
    flow transmitters, square root extractors or other signals using
    a square law. Select %DP Flow for all milliamp functions.
    AUTO-CHEK
    The Model 934 can be set up to automatically step the output
    with your choice of 2, 3, 5 or 10 steps from Zero to Full Scale.
    ENGINEERING UNITS
    Scale the display on the 934 to match the display of the
    instrument being calibrated. For example if you have a digital
    indicator showing 0.0 to 1000.0 Gallons/Hour from a flowmeter
    with 4 - 20 mA output you can scale the output of the 934 to
    display 0.0 at 4 mA and 1000.0 at 20 mA.
    39
    CALIBRATION PROCEDURE
    SOURCE MODE ADJUSTMENT
    mA
    1) Connect the Source leads in series with the 100 Ohm re-
    sistor. Connect the DVM parallel with the 100 Ohm resistor
    (See below).
    2) Turn the unit on and wait for the unit to go into calibration
    mode (SOURCE and READ flashing).
    3) Press the 
    STORE pushbutton to select Source Mode.
    4) Turn the Digital Pot (yellow knob) until mA is displayed and
    press the 
    STORE pushbutton.
    5) Dial the output with the READ toggle switch in the MAX
    position (coarse adjust) until the DVM displays approxi-
    mately 0.0 V. Move the READ
    toggle switch to READ (fine
    adjust) until the DVM reads
    0.0000V ±0.000096V and
    press the 
    STORE pushbutton.
    6) Dial the output (using the
    same coarse and fine adjust-
    ments) until the DVM reads
    2.4000V ±0.00024V and press
    the 
    STORE pushbutton.
    7) Turn the unit off.To change the output of the Model 934 during the calibration
    of the SOURCE functions both coarse and fine adjustments
    are used.  Place the 
    READ toggle switch in the MAX position
    for coarse adjustment and move the READ toggle switch
    to the READ position for fine adjustment.
    ALTEK 934SOURCEREAD
    DMM
    100 OHM
    If calibrating with an 81/2digit
    multimeter directly in milliamps
    the calibration points are0.000 mA
    ±0.00096mA and 24.000 mA±0.0024mA 
    						
    							5
    OPERATING INSTRUCTIONS
    GENERAL
    FIELD & BENCH USE
    The Model 934 comes with a carrying
    case and a built-in tilt stand/hanger.
    The 934 is held securely in the case
    by VELCRO
    ® for use with the carrying
    case open. The carrying case also has a
    snap-on belt loop which can also 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 Model 934.
    RESTORE DEFAULT SETTINGS
    The Model 934 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 ,idrange below HI
    and LO. The output and input are set to the mA range.
    1) Press and hold  both the 
    STORE& RESET push-buttons while
    turning the Model 934 on.
    2) Keep pressing the push-buttons
    until the display flashes once
    (10 seconds) then release.
    3) All segments on the LCD will
    remain displayed until the
    Model 934 has been reset QUIK-CHEK DEFAULTS
    RANGE      HI     LO
        mA         20.000 4.000
    %4-20mA100.00 0.00
       %DP  100.0 0.0
         mV 100.00 0.00
          V         5.000 1.000
    Note: Some ranges and functions are enabled by DIP
    switches (see pages 6 & 7 for factory settings).
    AUTOCAL
    To maintain accuracy the Model 934 periodically recalibrates
    its measuring circuitry against internal references. While this
    is occuring the word CAL will appear on the LCD display for
    less than 2 seconds.
    VELCRO®  is a registered trademark of Velcro USA40
    CALIBRATION PROCEDURE
    SOURCE MODE ADJUSTMENT
    2-Wire Sim
    1) Connect the Source leads in series with the current source
    set to 30 mA and the 100 Ohm resistor. Connect the DVM
    parallel with the 100 Ohm resistor (See below).
    2) Turn the unit on and wait for the unit to go into calibration
    mode (SOURCE and READ flashing).
    3) Press the 
    STORE pushbutton to select Source Mode.
    4) Turn the knob until 2-WIRE SIM is displayed and press the
    STORE pushbutton.
    5) Disconnect the positive output lead from the 100 Ohm
    resistor and wait until the display reads 0.00 and press the
    STORE pushbutton.
    6) Re-connect the positive output lead to the 100 Ohm
    resistor and dial the output until the DVM reads 2.4000V
    ±0.00024V and press the 
    STORE pushbutton.
    7) Turn the unit off.
    ALTEK 934
    CURRENT
    SOURCE SET
    AT 30mA
    SOURCEREAD
    DMM
    100 OHM 
    						
    							4
    ROCHESTER NY 14623ALTEK 934SOURCE19.934mA
    mA/V LOOP CALIBRATOROFF ONHI
    SET
    LOMAX
    READ
    MIN
    9VDC
    AUTO-CHEK HI
    MINREAD0.000V
    SOURCE
    STOREQUIK-CHEK ®SETUP
    READ
    RESETSETUP
    500
            MAXSOURCESOURCEREAD
    OPERATING INSTRUCTIONS
    GENERAL
    TURN-ON
    Each time the Model 934 is turned on,
    the LCD will display all segments for about
    1 second. It then displays the most recently
    selected Source & Read Settings.
    1) Move the power switch to 
    ON.
    All segments on the LCD are turned
    on during self test.
    2) The upper half of the LCD will indicate
    if SOURCE is enabled while the lower
    half will indicate if READ is enabled.
    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 for that function
    will be recalled.
    READ - The 934 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 from the READ
    toggle switch.
    CONNECTIONS
    The Model 934 has built-in test leads
    with alligator clips for attachment to
    instruments or sensors with terminal
    blocks or flying leads. 
    To prevent acci-
    dently overloading the instrument being
    tested, it is important to correctly set up
    the outputs before connecting the Model
    934 to any instruments to be calibrated.
    41
    ALTEK 934SOURCEREAD
    DMM
    100 OHM
    CALIBRATION PROCEDURE
    SOURCE MODE ADJUSTMENT
    mV
    1) Connect the Source leads to the DVM (See below).
    2) Turn the unit on and wait for the unit to go into calibration
    mode (SOURCE and READ flashing).
    3) Press the 
    STORE pushbutton to select Source Mode.
    4) Turn the knob until mV is displayed and press the STOREpushbutton.
    5) Dial the output until the DVM reads 0.000mV ±0.040mV
    and press the 
    STORE pushbutton.
    6) Dial the output until the DVM reads 999.900mV ±0.100mV
    and press the 
    STORE pushbutton.
    7) Turn the unit off.
    V
    1) Leave the Source leads connected as in the mV calibration
    2) Turn the unit on and wait for the unit to go into calibration
    mode (SOURCE and READ flashing).
    3) Press the 
    STORE pushbutton to
    select Source Mode.
    4) Turn the knob unitl V is displayed
    and press the STORE pushbutton.5) Dial the output until the DVM
    reads 0.0000V ±0.0022V and
    press the 
    STORE pushbutton.
    6) Dial the output until the DVM
    reads 20.0000V ±0.002V and
    press the 
    STORE pushbutton.
    7) Turn the unit off.
    8) Disconnect the source leads
    from the DVM. 
    						
    							3
    GENERAL INFORMATION
    MILLIAMP CALIBRATION
    Use at any point in your 4 to 20 milliamp loop. Source
    milliamps directly into your receivers with loop loads up to 1200
    Ohms. Simulate 2-Wire Transmitters for checkout of field
    wiring and total loop testing. Power and measure
    2-Wire or 4-Wire transmitters on the bench before installation.
    Read Transmitter & Controller outputs up to 52.00 mA.
    Display directly in milliamps, percent of 4 to 20 mA, percent
    of DP Flow or engineering units to match the scale of
    your process.
    VOLTAGE CALIBRATION
    Calibrate and checkout all your DC Voltage instrumentation.
    Source up to 999.90 millivolts to simulate sensors and up to
    20.000 Volts to check your process signal inputs.  Measure
    voltages from -99.990 to +99.990 VDC to check your power
    supplies and the outputs from any process voltage equipment.
    Calibrate any 1 to 5 Volt device in a live 4 to 20 milliamp loop
    without disconnecting any wires. The Model 934 will
    automatically source or sink 0 to >16 milliamps to clamp the
    test voltage in all source ranges. Output impedance is less
    than 0.2 Ohm to let you calibrate voltage instruments in
    milliamp loops without removing the input load resistors.
    QUIK-CHEK & AUTO-CHEK
    Instantly recall three output settings in each range with
    the handy QUIK-CHEK switch. All output settings are
    remembered for each function, even with the power off.
    Use the AUTO-CHEK to continously switch the Model
    934s output from Zero to Span in 2, 3, 5 or 10 equal steps
    at intervals of 5 to 900 seconds. Leave behind the panel
    and do your calibration from the front...or simulate your
    2-Wire transmitter and calibrate every device in the loop.
    42
    CALIBRATION PROCEDURE
    READ MODE ADJUSTMENT
    mA
    1) Connect the Read leads to a current source in series with
    a 100 Ohm resistor. Monitor the current by placing a DVM
    across the 100 Ohm resistor (See below).
    2) Turn the unit on and wait for the unit to go into calibration
    mode (SOURCE and READ flashing).
    3) Press the 
    RESET pushbutton to select Read mode.
    4) Dial the unit so mA is displayed and press the RESETpushbutton.
    5) Set the current source to 0.000mA so that the DVM reads
    0.0000V ±0.000096V and press the Read store pushbutton.6) Set the current source to 24.000mA so that the DVM reads
    2.4000V ±0.00024V and press the RESET pushbutton.
    7) Turn the unit off.
    ALTEK 934
    CURRENT
    SOURCE
    SOURCEREAD
    DMM
    100 OHM 
    						
    							2
    GENERAL INFORMATION
    Simultaneously source and read any combination of
    process milliamp and voltage signals. Alteks Model 934
    combines all the functionality of a milliamp and a
    voltage calibrator! This dual function calibrator continuously
    displays the output and input signals. The top half of the
    display indicates the output setting while the lower half of
    the display shows the signal being measured.
    Calibrate state of the art equipment such as smart
    transmitters and indicators to 4
    1/2 or more digits using the
    Model 934. Full 5 digit resolution lets you check any brand of
    process control equipment. Your calibrations are correct
    with accuracy surpassing 0.02% of reading.
    Use the scaleable display to match the readings on the
    Model 934 to that of the equipment being calibrated.
    For example, if your 4 to 20 mA recorder scale is 0.0 to
    300.0 gallons/hour you can set the 934 to display 0.0 for 4 mA
    and 300.0 for 20 mA. No more need to use your calculator
    or cheat sheet to come up with the correct milliamp values.
    Six AA alkaline batteries provide more than 20 hours
    sourcing 20 mA continuously . . . more than 3 months of typical
    use. From the time the low battery indicator first comes on you
    have hours of power remaining to get you through a shift without
    interruption. The 934 comes configured  to automatically power
    down after 30 minutes of inactivity to save battery life.
    Calibrate loop converters and isolators by simultaneously
    providing the input signal and measuring the output of
    the converter or isolator. Internal optoisolators withstand up to
    500 VDC  between the source and read leads. Calibrate and
    checkout all your process milliamp and voltage instruments
    with the benchtop accurate Model 934.
    YOUR NEW CALIBRATOR
    43
    CALIBRATION PROCEDURE
    mV
    1) Connect the Read leads to a voltage source and place
    the DVM across the voltage source  (See below).
    2) Turn the unit on and wait for the unit to go into calibration
    mode (SOURCE and READ flashing).
    3) Press the 
    RESET pushbutton to select Read mode.
    4)Dial the unit so mV is displayed press the RESET pushbutton.5) Set the voltage source to 0.00mV so that the DVM reads
    0.000mV ±0.040mV and press the RESET pushbutton.
    6) Set the voltage source to 999.90mV so that the DVM reads
    999.90mV ±0.100mV and press the 
    RESET pushbutton.
    7) Turn the unit off.
    V
    1)
    Leave the Read leads connected as in the mV calibration2) Turn the unit on and wait for the unit to go into calibration
    mode (SOURCE and READ flashing).
    3) Press the 
    RESET pushbutton to select Read mode.
    4) Dial the unit so V is displayed and press the RESETpushbutton to select V.
    5) Set the voltage source to 0.000V so that the DVM reads
    0.0000V ±0.0004V and press the 
    RESET pushbutton.
    6) Set the voltage source to 95.000V so that the DVM reads
    95.0000V ±0.0019V and press the 
    RESET pushbutton.
    7) Turn the unit off.
    READ MODE ADJUSTMENT
    ALTEK 934
    VOLTAGE
    SOURCE
    SOURCEREAD
    DMM
    After calibration has been
    completed place the unit into
    normal operating mode by
    placing the CAL Enable
    jumper  back into the stored
    position (See figure page 38). 
    						
    							1
    FEATURES
    • DUAL LIQUID CRYSTAL DISPLAY
    Simultaneous Source and Read
    • LABORATORY ACCURATE
    ±(0.012% of Reading + 0.008% of Full Scale Reading)
    Accurate to ±0.004 mA from 4 to 20 mA
    • USER SETTABLE “QUIK-CHEK®s”
    Set any Span & Zero
    • FULL FIVE DIGIT DISPLAYS
    Source up to 24.000 mA, 20.000 V or 999.90 mV
    Read up to 52.000 mA, 99.990 V or 999.90 mV
    • SCALEABLE DISPLAY
    Set in engineering units
    • SPEED SENSITIVE DIGIPOT
    Fast setting to any desired value
    • “AUTO-CHEK”
    TM OUTPUTS
    Automatically outputs in 2, 3, 5 or 10 steps
    • ISOLATED  SOURCE AND READ
    Isolated to 500VDC
    Fuseless protection to 120 V AC/DC
    44
    THREE YEAR WARRANTY
     Altek products are warranted to be free from defects in
    material and workmanship (excluding fuses, batteries and
    leads) for a period of one year from the date of shipment.
    Warranty repairs can be obtained by returning the equipment
    prepaid to our factory. Products will be replaced, repaired, or
    adjusted at our option. 
    Altek gives no other warranties, includ-
    ing any implied warranty of fitness for a particular purpose.
    Also, Altek shall not be liable for any special, indirect, incidental
    or consequential damages or losses arising from the sale or use
    of its products. 
    						
    							ORDERING INFORMATION               Part No.
    MODEL 934 MULTIFUNCTION
    LOOP CALIBRATOR                                             934
    A carrying case is included with each Model 934
    Contents
    GENERAL INFORMATION......................................................... 2
    YOUR NEW CALIBRATOR...................................................... 2
    MILLIAMP CALIBRATION...................................................... 3
    VOLTAGE CALIBRATION ........................................................ 3
    QUIK-CHEK & AUTO-CHEK................................................... 3
    GENERAL OPERATING INSTRUCTIONS.................................. 4
    TURN ON................................................................................. 4
    RESTORE DEFAULT SETTINGS............................................ 5
    ENABLING RANGES & FUNCTIONS..................................... 6
    AUTO-OFF .......................................................................... 6
    % DP FLOW ........................................................................ 6
    AUTO-CHEK ...................................................................... 6
    ENGINEERING UNITS...................................................... 6
    SETTING DIP SWITCHES...................................................... 7
    RANGES.................................................................................. 8
    CHANGING BATTERIES......................................................... 9
    USING ENGINEERING UNITS............................................ 10
    SOURCE MODE OPERATING INSTRUCTIONS.................... 14
    STORING QUIK-CHEK
    ® OUTPUTS.................................... 16
    RECALLING QUIK-CHEK OUTPUTS.................................. 16
    SOURCE FUNCTIONS........................................................ 17
    CALIBRATE MILLIAMP INPUTS..................................... 17
    SIMULATE 2-WIRE TRANSMITTERS............................ 18
    POWER & MEASURE 2-WIRE TRANSMITTERS.......... 19
    CALIBRATE VOLTAGE INPUTS ...................................... 20
    CALIBRATE LOOP CONVERTERS & ISOLATORS....... 21
    CHECK 1-5 VOLT INPUTS WITHOUT
    DISCONNECTING WIRES.............................................. 22
    USING AUTO-CHEK....................................................... 24
    READ MODE OPERATING INSTRUCTIONS........................... 28
    MIN/MAX ............................................................................... 29
    READ FUNCTIONS.............................................................. 30
    READ MILLIAMP OUTPUTS.......................................... 30
    READ VOLTAGE OUTPUTS ............................................ 31
    SPECIFICATIONS...................................................................... 32
    CALIBRATION PROCEDURE................................................. 38
    WARRANTY............................................................................... 44
    ORDERING INFORMATION...................................................... 45 
    						
    							PN 1886535 Rev A April 2002
    ©2002 Altek Industries, Inc. Specifications subject to change without notice.
    All tights reserved. Printed in U.S.A.
    Multifunction Loop Calibrator
    Model 934 
    						
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