Practical Instrument Electronics 530 - Manual (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. 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.
Factory Reset ON/OFF (default)
If Factory Reset is ON, the unit will restore all factory defaults when the Model 530 is turned OFF and back
ON. This will reset any changes made in the Model 530 Configuration options, returning the unit to its
simplest factory configuration.
Instructions for Enabling and Disabling the Configuration options in the Model 530
1. Turn the Model 530 on.
2. Press the EZ-Dial knob while the “PRESS EZ-DIAL KNOB FOR CONFIGURATION” message is
displayed.
3. Select options by turning the EZ-Dial knob until the arrow points to the desired option.
4. The option can be enabled or disabled by tapping the EZ-Dial knob.
5. Turning the Model 530 off to exit configuration.
Error Conditions
Source Milliamps:
“HIGH Ω” flashes in place of bar graph
Power Measure:
“CURRENT LIMITED” flashes in place of bar graph
2-Wire Transmitter Simulate:
“LOW SUPPLY” flashes in place of bar graph
Read Milliamps:
“CURRENT LIMITED” flashes in place of bar graph
Read Volts:
“OVERRANGE” flashes in place of bar graph
841 Holt Road #1 • Webster, NY 14580 Tel: 585-872-9350 • Fax: 585-872-2638 [email protected] • http://www.piecal.com/
Practical Instrument Electronics, Inc. Copyright  2002. All rights reserved. 530-9002 2/26/04 4-8