Thermo Fisher Scientific Alpha pH 2000D - Manual (Page 44)

11.4.4 Control signal of Pulse length Controllers
Relay
ON
tON tOFF
Pulse Length T
OFF
Time [s]
The output relay of the pulse length controller is clock-timed. The switching period T remains constant.
Depending on the divergence from the limit value, the switch on time tON is increased or decreased in
accordance with the proportional range Xp.
The following applies:
tON + tOFF = T (Const.)
greater divergence Î greater tON
Xp exceeded Î tON = T (relay remains picked up)
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