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Practical Instrument Electronics

Model 530

4-20 Milliamp Loop Calibrator

Operating Instructions

Basic Keypad Operations

1 EZ-Check™ Switch/EZ-Step™ Pushbutton

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.

2SOURCE/STEP SIZE Button

Press SOURCE to change source modes. These are:

• Source Milliamps

• 2-Wire Transmitter Simulate

3ON/OFF Button

Press ON/OFF to turn the Model 530 on or off.

4 UNITS Button

Press UNITS to change how current is

displayed – either in milliamperes or % of 4-20

mA. Voltage is only displayed in Volts.

READ Button

Press READ button to change read modes.

These are:

• Read Milliamps

• Power and Measure 2-Wire Transmitter

• Read Volts

h STORE/CLEAR Button

In any source mode:

Press STORE/CLEAR to save the current

reading in the EZ-Check HI or LO position.

The EZ-Check switch must be set to HI or L

The display will flash “STORED” to confirm.

In any read mode:

Press STORE/CLEAR to clear the values saved

in the EZ-Check™ HI and LO positions. The

display will flash “CLEARED” to confirm.

i EZ-Dial™ Knob

Turn the EZ-Dial™ knob to adjust the output

level. Press and turn to adjust 100X faster.

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 %.)

EZ-Check™ Switch

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. Neither indicator indicates the middle position. Use of the EZ-

Check switch depends on mode.

841 Holt Road #1 • Webster, NY 14580 Tel: 585-872-9350 • Fax: 585-872-2638 sales@piecal.com • http://www.piecal.com/

530-9002 2/26/04

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Summary of content (8 pages)

PAGE 1
Model 530 4-20 Milliamp Loop Calibrator Operating Instructions Practical Instrument Electronics Basic Keypad Operations 1 EZ-Check™ Switch/EZ-Step™ Pushbutton 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. 4 UNITS Button Press UNITS to change how current is displayed – either in milliamperes or % of 4-20 mA. Voltage is only displayed in Volts.
PAGE 2
Model 530 Operating Instructions EZ-Check™ Switch cont. 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.
PAGE 3
Model 530 Operating Instructions EZ-Step™ Size and Direction cont. To Change the EZ-Step TM Direction: 1. Press the EZ-Dial knob. 2. The display will change to show the EZ-StepTM direction selected ( or ). Auto Step/Ramp Auto step/ramp times are given in Table 1. In step modes (EZ-Step sizes 8, 4, and 1 mA or 50, 25 and 10 %) the output will change in discrete steps. In ramp modes, the output is approximately continuous.
PAGE 4
Model 530 Operating Instructions Quick Reference Bar Graph cont. ® HART Compatibility Mode - ON/OFF (default) The Model 530 has a HART® compatibility mode. This mode is useful when the devices being powered communicate using the HART® protocol. In this mode the Model 530 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.
PAGE 5
Model 530 Operating Instructions Source Mode Receiver Transmitter Input (Sensor) (Process Signal) (Simulated Input) + IN - REF +OUT- Typical 2-Wire Transmitter Power Supply 0 to 60 VDC Source mode uses internal power to supply current from 0.000-24.000 mA into as much as 1200Ω (with HART resistor disabled) until the end of battery life. The calibrator will indicate “HIGH Ω” if connected improperly. The three-position EZ-Check switch provides instant zero and span calibration outputs.
PAGE 6
Model 530 Operating Instructions Power and Measure Transmitter Mode Receiver Transmitter Input (Sensor) (Process Signal) (Simulated Input) + IN - REF +OUT- Typical 2-Wire Transmitter Power Supply 0 to 60 VDC The Model 530 supplies 24 Volts to the transmitter and displays the output in mA or % on the Model 530 display. If the Model 530’s HART® protocol mode is selected, an internal 250 Ω load resistor is connected in series with the output as specified for proper communication by HART devices.
PAGE 7
Model 530 Operating Instructions Measure DC Volts Mode Receiver Transmitter Input (Sensor) (Process Signal) (Simulated Input) + IN - REF +OUT- Typical 2-Wire Transmitter Power Supply 0 to 60 VDC The Measure DC Volts Mode reads voltage from 0.00 to ±60.00 VDC. This mode can be used to check loop power, measure voltage drop across 250Ω load loop resistors, 1 to 5V signals, I/V converters and battery voltages.
PAGE 8
Model 530 Operating Instructions Source/Power and Measure 2-Wire Transmitter Specifications: Loop compliance voltage ≥ 24 Volts Loop drive capability 1200 Ω at 20 mA for entire battery life Miscellaneous Open loop or out of compliance conditions are indicated by appropriate error display Battery life in: Source mode ≥ 18 hrs at 12mA typical (HART® disabled) Power measure ≥ 10 hrs at 12mA typical ® HART protocol mode is a selectable option at turn on.