User Manual

Model 535 Operating Instructions
82 E. Main Street Suite 3.14 • Webster, NY 14580
Tel: [phone] • Fax: [phone]
[e-mail] • http://www.piecal.com/
Practical Instrument Electronics, Inc. Copyright  2011. All rights reserved.
535-9002 Rev G 7/13/11
3-8
Auto Step/Ramp
Press the EZ-Step pushbutton for more than one second to activate auto step/ramp mode. The Model 535 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.
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 will show how the Step/Ramp Parameters are used to configure automatic stepping/ramping.
Figure 1
0
4
8
12
16
20
24
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
time
mA
Note: The Model 535’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 535.
Quick Reference Bar Graph
The Quick Reference Bar Graph indicates the input and output level on the Model 535 in % of 4-20/10-50 mA with 1% resolution.
ramp
time
soak time
step size = (EZ-Step HI – EZ-Step LO)
÷
# of steps
step time = ramp time
÷
# of
t