User Manual
Model 535 Operating Instructions
82 E. Main Street Suite 3.14 • Webster, NY 14580
Tel: 585-872-9350 • Fax: 585-872-2638
sales@piecal.com • http://www.piecal.com/
Practical Instrument Electronics, Inc. Copyright 2011. All rights reserved.
535-9002 Rev G 7/13/11
2-8
Model 535 Configuration
Press the EZ-Dial Knob while turning the Model 535 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.
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.
4-20/10-50 Range (default) ON
Select either 4-20 or 10-50 milliamp range. The Model 535 scales % mode display and the bar graph accordingly.
Factory Reset ON/OFF (default)
If Factory Reset is ON, the unit will restore all factory defaults when the Model 535 is turned OFF and back ON. This will reset any
changes made in the Model 535 Configuration options, returning the unit to its simplest factory configuration.
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 4-20/10-50
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. 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 535 display. This is also useful in poor lighting or under difficult operating conditions.
Read Modes:
In read modes, the Model 535 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 535 has EZ-Check HI/LO Readings OFF.
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
figure 1. By default, the Model 535 has EZ-Step OFF.