PIE Practical Instrument Electronics 532 Operating Manual

Model 532

mA/V Loop Calibrator

with Loop Diagnostic

Practical Instrument Electronics

A. Basic Keypad Operations

Operating Instructions

EZ-Check™ Switch/EZ-Step™ Pushbutton

1

Slide the switch to select the user stored values for calibration points. Press the button to adjust the output by the user defined step size. Press and hold the button to activate the auto step/ramp mode.

SOURCE/STEP SIZE Button

2

Press and release SOURCE/STEP SIZE to change source modes. These are:

• Source Milliamps

• 2-Wire Transmitter Simulate

• Source Volts

Press and hold SOURCE/STEP SIZE to change step size. Refer to section H.

ON/OFF Button

3

Press ON/OFF to turn the Model 532 on or off.

UNITS/STEP TIME Button

4

Press and release UNITS/STEP TIME to change how current is displayed: either in milliamperes or % of 4-20 mA. Voltage is only displayed in volts.

Press and hold UNITS/STEP TIME to change step size. Refer to section H.

5 READ/SOAK TIME Button

Press and release READ/SOAK TIME to change read modes. These are:

• Read Milliamps

• Power and Measure 2-Wire Transmitter

• Read Volts

Press and hold READ/SOAK TIME to change soak time. Refer to section H.

STORE/CLEAR/DIAGNOSTIC Button

h

In any source mode: Press STORE/CLEAR/DIAGNOSTIC to save the current reading in the EZ-Check HI or LO position. The EZ-Check switch must be set to HI or LO. The display will flash “STORED” to confirm.

In any read mode: Press STORE/CLEAR/DIAGNOSTIC to clear the values saved in the EZ-Check HI and LO positions. The display will flash “CLEARED” to confirm.

Press and hold STORE/CLEAR/DIAGNOSTIC to activate diagnostic mode. See section I.

EZ-Dial™ Knob

i

Turn the EZ-Dial knob to adjust the output level. Press and turn to adjust 100X faster.

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Model 532 Operating Instructions

B. Model 532 Configuration

Press the EZ-Dial Knob while turning the Model 532 on to access the configuration mode. Turn the EZ-Dial Knob to select configuration items. Press the EZ-Dial Knob to change configuration items. Turn the unit off or just wait approximately 8 seconds to exit the configuration mode.

Auto Off - ON (default)/OFF

Auto Off is ON, by default, to save battery life by turning the unit off after 30 minutes of inactivity. Turn Auto Off to OFF to prevent automatic shutdown. This is typically useful for manual loading or continuous use.

EZ-Step - ON/OFF (default)

If EZ-Step is ON manual and automatic stepping/ramping is available. If EZ-Step is OFF the EZ-Step pushbutton will be disabled and the step direction indicator will not be displayed.

HART® Compatibility Mode - ON/OFF (default)

The Model 532 has a HART® compatibility mode. This mode is useful when the devices being powered communicate using the HART® protocol. In this mode the Model 532 connects a 250 Ω load resistor in series with the output in both Source and Power Measure 2-Wire transmitter modes. This eliminates the requirement of an external 250 Ω load resistor. This resistor is typically shown in connection diagrams and manuals for HART® devices.

If HART® Compatibility Mode is ON, a 250 Ω load resistor is automatically switched in series with the output in Source and Power Measure 2-Wire Transmitter modes. The output compliance with HART® Compatibility Mode ON is 950 Ω at 20 mA.

If HART® Compatibility Mode is OFF there is no 250 Ω load resistor in series with the output. This will increase the output compliance voltage to drive 1200 Ω at 20 mA.

EZ-Check HI/LO Readings ON/OFF (default)

If the EZ-Check HI/LO Readings option is ON, the highest and lowest readings will automatically be saved in the HI and LO EZ-Check™ positions.

If this option is OFF the HI and LO positions will show the current reading.

Loop Diagnostic ON (default)/OFF

Loop Diagnostic may be turned off to prevent entry into diagnostic mode. This may make the Model 532 simpler to operate by eliminating accidental entry into diagnostic mode.

Factory Reset ON/OFF (default)

If Factory Reset is ON, the unit will restore all factory defaults when the Model 532 is turned OFF and back ON. This will reset any changes made in the Model 532 Configuration options, returning the unit to its simplest factory configuration.

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Model 532 Operating Instructions

C. EZ-Dial Knob

Adjust the output up and down with the EZ-Dial knob. The increment is 0.001 mA (or 0.01 % if display units are % of 4-20 mA.) Press while turning to adjust 100X faster – 0.100 mA (or 1.00 %.)

D. EZ-Check

The EZ-Check™ switch has three positions -- high, set, and low. Its position is shown at the left edge of the display with “HI” and “LO” indicators. Use of the EZ-Check switch depends on mode:

Source Modes:

Slide the EZ-Check switch to the HI and LO positions to recall the settings stored in those positions. While in the HI and LO positions, dial the EZ-Dial knob to change the display. Press STORE/CLEAR to save new settings in the HI and LO positions. The display will flash “STORED” to confirm.

Hint: For faster calibrations, the position of the switch can be felt. This feature allows continuous monitoring of the device being calibrated without looking back at the Model 532 display. This is also useful in poor lighting or under difficult operating conditions.

Read Modes:

In read modes, the Model 532 calibrator records the maximum and minimum readings observed in each mode. Slide the EZ-Check switch to the HI and LO positions to display the readings. Press STORE/CLEAR to clear the readings. The display will flash “CLEARED” to confirm.

By default, the Model 532 has EZ-Check HI/LO Readings OFF. Refer to Model 532 Configuration, section B.



Switch

E. EZ-Step Pushbutton/ Manual Step

The EZ-Step pushbutton is a feature only in source modes.

Press and hold the EZ-Step pushbutton for less than one second to cause the output to step up or down by the EZ-Step size.

The EZ-Step direction is indicated on the display ( or ). Press the EZ-Dial knob to change the step direction.

Stepping and auto step/ramp limits are defined by the EZ-Check HI and LO settings. The step direction changes when a limit is reached.

The step size is computed as the difference between the EZ-Check HI and the EZ-Check LO divided by the number of steps. See section H.

By default, the Model 532 has EZ-Step OFF. Refer to Model 532 Configuration, section B.

F. Auto Step/Ramp

Press the EZ-Step pushbutton for more than one second to activate auto step/ramp mode. The Model 532 will automatically step by the selected EZ-Step size and time. Press the EZ-Step pushbutton again to deactivate auto step/ramp mode.

The EZ-Step direction is indicated on the display ( or ). Press the EZ-Dial knob to change the step direction. The step direction can be changed while automatically stepping/ramping.

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Model 532 Operating Instructions

Stepping and auto step/ramp limits are defined by the EZ-Check HI and LO settings. The step direction changes when a limit is reached.

Figure 1 shows how the Step/Ramp Parameters are used to configure automatic stepping/ramping.

Figure 1

24

20

ramp

time

mA

step time = ramp time ÷ # of steps

16

soak time

12

8

step size = (EZ-Step HI – EZ-Step LO) ÷ # of steps

4

0

123456789101112131415

time

Note: The Model 532’s ability to detect overload/undervoltage conditions may be limited by the rate of change in the output when using automatic stepping/ramping. Turn auto step/ramp off while connecting or disconnecting the Model 532.

G. Quick Reference Bar Graph

The Quick Reference Bar Graph indicates the input and output level on the Model 532 in % of 4-20 mA with 1% resolution.

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Model 532 Operating Instructions

H. Manual Step and Auto Step/Ramp Parameter

To Change the EZ-Step Size:

1. Press and hold the SOURCE/STEP SIZE button for more than

2. The display will flash “EZ-STEP SIZE”.

3. Turn the EZ-Dial knob to select from 2 to 16 steps between

4. Turn the EZ-Dial clockwise past 16 steps to select continuous

5. Press the SOURCE/STEP SIZE button again to return to the

Note: If the EZ-Step OFF”. Refer to Model 532 Configuration, section B.

To Change the EZ-Step Time:

1. Press and hold the UNITS/STEP TIME button for more than

2. The display will flash “EZ-STEP TIME”.

3. Turn the EZ-Dial knob to select from 5 to 900 second ramp

4. Press the SOURCE/STEP SIZE button to return to the normal

To Change the Soak Time:

1. Press and hold the READ/SOAK TIME button for more than

2. The display will flash “SOAK TIME”.

3. Turn the EZ-Dial knob to select from 0 to 900 second soak

4. Press the READ/SOAK TIME button again to return to the

¾ of a second.

the EZ-Check limits.

ramp mode.

normal display.

option is turned off, the display will flash “EZ-STEP



¾ of a second.

time. The time per step is calculated based on the selected EZ-Step size.

display.

¾ of a second.

time.

Note: A soak time of 0 defeats the soak period. The step time will be used instead.

normal display.

TM

To Change the EZ-Step

1. Press and release the EZ-Dial knob without turning.

2. The display will change to show the EZ-Step direction selected ( or ).

Direction:

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Model 532 Operating Instructions

I. Loop Diagnostic

Press and hold the STORE/CLEAR/DIAGNOSTIC button for more than ¾ of a second to activate loop diagnostic mode. This is available in each of the Model 532’s operating modes.

Read Modes:

Read Milliamps

Loop current is displayed.

Power and Measure 2-Wire Transmitter

Loop current, voltage, and resistance is displayed.

Read Volts

Voltage is displayed.

Source Modes:

The EZ-Dial knob, EZ-Check switch, and EZ-Step pushbutton function normally when the loop diagnostic is activated.

Source

2-Wire

Source

Milliamps

Loop current, voltage, and resistance is displayed. The resistance is highlighted if it exceeds the Model 532’s outp

0 mA with HART Compatibility disabled.)

2

Transmitter Simulate

Loop current is displayed. The Model 532 automatically performs a te every 7 seconds to compute the loop power supply voltage and loop resistance. The Model 532 requires approximately 2 volts across its terminals to operate in 2 Wire Simulate mode. T highlighted if there is less than 2 volts present.

Volts

Loop current, voltage, and resistance is displayed. The resistance is highlighted if it exceeds the Model 532’s outp 1200 Ω with HART Compatibility disabled.)

ut capability (1200 Ω at

he voltage display is

ut capability (20 mA into

st

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Model 532 Operating Instructions

In all loop diagnostic modes, AC voltage is displayed. If more than 2 VAC is present on the Model 532’s terminals, the display is highlighted to alert the user of a potential problem.

In all loop diagnostic modes, HART activity is indicated with “♥ HART DETECTED ♥” . The ♥ symbols flash on and off with the actual HART messages.

J. Modes of Operation

Read Milliamp

Connect the Model 532 in series with the process loop to monitor current. Observe correct polarity. Current limiting above 24.000 mA is indicated by a flashing “CURRENT LIMITED” display.

Power and Measure 2 Wire Transmitter

The Model 532 measures +/- 30 VDC with 4X overrange ability. The display flashes “OVERRANGE” when the 30 volt limit is exceeded. 0.001 volt resolution below 24.00 volts provides the ability to calibrate 1-5 volt instrumentation.

The Model 532 provides power to the process loop while displaying output current. Use this mode to test a transmitter’s ability to control loop current. Current limiting above 24.000 mA is indicated by a flashing “CURRENT LIMITED” display.

Read Volts

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Model 532 Operating Instructions

Connect the Model 532 directly to 4-20 mA receiver equipment, alarms, panel meters, etc. Use the EZ-Dial Knob and EZ-Check Switch to adjust loop current. The display flashes “HIGH Ω” when the loop resistance is too high or the leads are open.

Substitute the Model532 for a 2 wire transmitter. Use the EZ-Dial Knob and EZCheck Switch to adjust loop current. At least 2 volts of loop power is required, else the display flashes “CHECK LOOP SUPPLY.”

2 Wire Transmitter Simulate

Source Milliamp

Source Volts

The Model 532 sources 0.000-24.000 volts. This is useful for powering transmitters and receiver equipment. Use the EZ-Dial Knob and EZ-Check Switch to adjust output voltage. The display flashes “LOW Ω” when the output is overloaded.

K. Warranty

Our equipment is guaranteed against defective material and workmanship (excluding batteries) for a period of three years from the

date of shipment. Claims under guarantee can be made by returning the equipment prepaid to our factory. The equipment will be

repaired, replaced or adjusted at our option. The liability of Practical Instrument Electronics (PIE) is restricted to that given under our

guarantee. No responsibility is accepted for damage, loss or other expense incurred through sale or use of our equipment. Under no

condition shall Practical Instrument Electronics, Inc. be liable for any special, incidental or consequential damage.

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PIE Practical Instrument Electronics 532 Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

A. Basic Keypad Operations

B. Model 532 Configuration

Auto Off - ON (default)/OFF

Loop Diagnostic ON (default)/OFF

Factory Reset ON/OFF (default)

F. Auto Step/Ramp

H. Manual Step and Auto Step/Ramp Parameter

To Change the Soak Time:

I. Loop Diagnostic

Read Modes:

Read Milliamps

Power and Measure 2-Wire Transmitter

Read Volts

Source Modes:

Transmitter Simulate

J. Modes of Operation

K. Warranty