S503_r2.1 – 09/2022 Page 7
For a correct functioning of the device even in bad interference conditions, it is recommended to
proceed as follows:
a) insert one of the supplied ferrites on the power supply cable as shown in the below picture
b) connect the shield of the signal cable to the grounding or to the REF terminal
c) insert the second supplied ferrite on the input signal cable as shown in the below picture
d) connect RC suppressors (or similar) in parallel with the load (properly dimensioned)
e) check the correct grounding connection of the electric cabin that contains the instrument
f) if the cable connected to the current output is longer than 20 meters, use shielded cable
Make one or two turns (depending on the cable section) around the ferrite.
Note: The instrument is supplied with two ferrites, one for the power cable and one for the input signal cable. In
the case of a second input (temperature) with separate cable from that of the main input, order a third ferrite.
START-UP
At start-up S503 performs a quick test of the display switching on all the segments, then shows the
instrument/software version code, checks the memory status, and displays error or advice codes (if
present). For details, see “ERRORS” section.
After completing the start-up operations, the device enters the normal operating mode, displays main
measurement and temperature, and updates accordingly the current and relay outputs.
If at start-up the [+] and [-] keys are pressed simultaneously, the device runs a simulation program: “0”
is displayed and the LED ON blinks. This value simulates the measurement and can be adjusted with
the [+] and [-] keys, for testing the functioning and configuration of the current and relay outputs. To exit
the simulation mode, press NEXT.
CONFIGURATION
This section describes the operating procedure for configuring editable parameters from the keyboard.
1) Press and hold the CAL key for at least 2 seconds to enter
configuration/calibration mode
2) Press NEXT to start the configuration
3) Release the and the display will show the first editable
parameter
4) Use the [+] and [-] keys to go to the next/previous parameter,
or press CAL to move the cursor on the parameter value;
modify the value with the [+] and [-] keys
5) Press CAL to confirm the modification or next to proceed
without saving
6) Now the display shows the next parameter
7) Proceed as explained at steps 4 and 5 for setting all the
parameters
8) To exit the configuration mode, press NEXT
9) If no key is pressed, after a few seconds the instrument will automatically quit the configuration mode
E
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#
0 1
2-pole + ground (Y/G)
cable from mains To the power
supply terminals
on S503
Ferrite (part number 5062.0020)
