5 control signal of pulse frequency controllers, Control signal of pulse frequency controllers – Thermo Fisher Scientific Alpha pH 2000D User Manual
Page 45
11.4.5
Control signal of Pulse Frequency Controllers
Relay
ON
tON
tOFF
Pulse Length T
OFF
Time [s]
The output relay of the pulse frequency controller is clock-timed. The pulse duration tON remains
constant at 250 msec. Depending on the divergence from the limit value, the frequency (1/T) is
increased or decreased in accordance with the proportional range Xp.
The following applies:
tON = Const. (250 msec.)
greater divergence
Î greater f (greater frequency)
Xp exceeded
Î max. frequency
- 40 -
See also other documents in the category Thermo Fisher Scientific Tools:
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- pHScan BNC (3 pages)
- pHScan 3/3+ (5 pages)
- pHTestr 1 (3 pages)
- pHTestr 10/20/30/10 BNC/Spear (2 pages)
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- EcoTestr EC Low (2 pages)
- EcoTestr TDS High (2 pages)
- EcoTestr TDS Low (2 pages)
- EcoTestr Salt (2 pages)
- Eutech pH 5/6 Plus & Ion 6 Plus (New version R1.1, SN >797406) (23 pages)
- Eutech pH 5/6 Plus & Ion 6 Plus (Old version EP6, SN <797406, discontinued) (23 pages)
- Eutech COND/TDS/Salt 6 Plus (40 pages)
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- EcoScan CON 6 & TDS 6 (56 pages)
- EcoScan CON 5 & TDS 5 (18 pages)
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- CyberScan CON 11/CON 110 (80 pages)
- CyberScan DO 110 (60 pages)
- CyberScan PCD 650 (127 pages)
- CyberScan CON 400/410 (For units manufactured before March 2010, discontinued) (60 pages)
- CyberScan CON 400 (For units manufactured from March 2010 onwards) (60 pages)
- CyberScan pH 300/310 (52 pages)
- CyberScan DO 300 (60 pages)
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