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USER MANUAL
Table 2-10: 1817X Bi-directional preamplifier configuration (continued)
Designator Terminal connections Description
3 Direction Forward (A before B): OVDC, OC
Reverse (B before A): Vs, OC
4 Channel A output
5 Channel B output
6 Optional (X2)
Pickoff (2) 7 White
8 Red
9 White
10 Red
Pickoff coils
The Series 1500 LTM has the capacity for dual pickoff coils mounted 90º electrically out of
phase. Each pickoff produces a low level sine wave signal which varies in amplitude (mV)
and frequency (Hz) proportional to the velocity of the turbine blades. This signal
information is coupled to the input terminals of the preamplifier.
The optional dual LME LTM can be configured with four pickoff coils, each pair mounted
90º electrically out of phase.
Induced interference
The LTM should be located as far as possible from any electrical equipment such as
motors, solenoids or relays which could induce an interference signal into the turbine
meter pickoff coil. High amplitude interference introduced into the preamplifier can result
in interference with the flow signal. Proper shielding and an earth grounded LME housing
will greatly reduce the possibility of induced interference.
Accessory hookup
It is important that the correct service manual be referenced before attempting to use
accessories or instrumentation with the Series 1500 LTM. Contact the factory or nearest
Daniel Measurement and Control Sales and Service Office if service manuals for were not
received at the time of purchase or delivery.
LTM flange type
The mechanical connections for a Series 1500 LTM NPS 3 through 24 are standard class
150, 300, 600 and 900 ANSI S.O. R.F. flanges, which are available in stainless steel and
carbon. For class ratings 1500 and 2500 Daniel offers weld neck RTJ Daniel type flanges as
standard. Other types of flange connections are available per customer request. For other
ANSI ratings or flanges consult the factory engineers. For maximum working pressures at
intermediate temperatures refer to ANSI B16.5.
Operating conditions and specifications User manual
March 2019 P/N 3-9008-515
50 Daniel Series 1500 Liquid Turbine Meter, NPS 3-24
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