SP 1, SP 2, SP 2.3, SP 2.4 17
SPR1, SPR 2, SPR 2.3, SPR 2.4
4.3 Adjustment of resistant transmitter (Fig.5)
The resistant transmitter is in the EA SP used to function as a remote position indicator; in the EA SPR
to function as a feedback in the position controller and if needed also in the
position of a remote resistant position indicator.
Before the resistant transmitter adjustment the position switches
have to be adjusted. Adjustment consists in setting of the resistance in the
defined limit position of the EA.
Notes:
1. While adjusting the EA with double resistant transmitter only the
resistance of one section is to be adjusted because of the mechanical
connection of the both sections.
2. In case that the EA is not used in the whole stroke range given on the
nameplate, the resistance in the limit position "open" is proportionally
reduced.
3. In the EA SPR 2000Ω resistant transmitters are used. In the other cases if the resistant branch is lead to the
terminal board the resistance of the transmitters is according to the customer's specification.
To adjust the transmitter follow these steps:
• Loosen the fixing screws (9) of the transmitter holder and push the transmitter out of mesh.
• Connect a meter for resistance measuring to the terminals 71 and 73 of the EA SP terminal board, or to the
terminals 7 and 10 of the EA SPR terminal board.
• Put the actuator to the position ”closed” (with the handwheel, or with the local electric position control until
the corresponding position switch S2 or S4 switches).
• Rotate the transmitter shaft until resistance of ≤5% of the nominal transmitter resistance can be read on the
meter in case of EA SP, and 3 up to 7% of the nominal transmitter resistance in case of EA SPR, i.e. with the
resistant transmitter with the converter PTK1.
• In the position put the transmitter to mesh with the drive wheel and fix the fixing screws on the transmitter
holder.
• Disconnect the meter from the terminal board.
4.4 Adjustment of the Electronic Position Transmitter (EPV) - the Resistive
Transmitter (Potentiometer) with the Converter PTK 1
4.4.1 EPV – the 2-wire version (Fig. 6)
The position transmitter with the converter PTK1 is in the plant adjusted to have the output current signal
on the terminals 81-82 as follows:
• in the position ”open“ ...................................... 20 mA
• in the position ”closed“ .................................... 4 mA
Adjustment of the EPV in Electric Actuators SP
If the transmitter requires a new adjustment follow these steps:
• Put the actuator to the position ”closed“ and switch the
power supply off.
• Adjust the resistive transmitter according to the previous
chapter. The resistance is to be metered on the terminals X-
Y (Fig. 6). The used transmitter resistance is 100 Ω.
• Switch the converter′s power supply on.
• Turn the adjusting trimmer ZERO (Fig. 6) to adjust the output
current signal rate measured on the terminals 81-82 to 4mA.
• Set the actuator to the position ”open“.
• Turn the adjusting trimmer GAIN (Fig. 6) to adjust the output
current signal rate measured on the terminals 81-82 to
20mA.
• Check the output signal of the converter in the both limit
positions, and repeat the procedure if needed.
Fig. 5
Fig.6
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