Multi-Tech Systems 7500 - Manual (Page 186)

Telnet and HyperTerminal Access ION 7500 / ION 7600 User’s Guide
Page 186 Current Probe Inputs Basic Setup Technical Note
Telnet and HyperTerminal Access
To perform current probe basic setup, you need to access the meter Calibration
menu in a Telnet or HyperTerminal session:
◆ Telnet: select Debug Parser > KAL? (Display Calibration Help Screen).
◆ HyperTerminal: select the KAL? (Display Calibration Help Screen).
Refer to the technical note titled Telnet and HyperTerminal Access for instructions on
how to run a Telnet or HyperTerminal session.
To learn more about the Calibration menu, help, and commands refer to the
section “Calibration Menu and the KCTSTP/KCTRD Commands” on page 188.
Current Probe Basic Setup
Basic setup for current probes involves programming the meter with the current
probe transformation ratio, and if necessary, the phase angle provided by the
current probe manufacturer (phase angle correction is necessary if energy readings
accuracy is required). These parameters are saved to the meter as User Defined 1 or
User Defined 2 and are activated on the meter with the meter front panel or
software.
In the following example, we will set up a ION 7500 meter to match current probes
that have a 300A primary rating, a 0.333V output, and a phase shift of 2
° (as
specified by the current probe manufacturer) .
In a Telnet or HyperTerminal session, we will set up the parameters using the
KCTSTP write command, and save this to the meter as User Defined 1. (Refer to the
KCTSTP command in the ”The Calibration menu contains the following calibration
commands:” section).
Next, we will verify our setup with the KCTRD read command. Finally, with the
meter front panel or software, we will access the Power Meter module Current
Probe setup register, and select User Defined 1. This activates the meter with the
parameters we have set in this example.
C AUTION
Before changing meter parameters, use the Calibration menu KCTRD read command to display the
meter default settings. Print out the default settings, and store the printout so you can refer to the default
settings later if required.