DANIEL 1200 Series User Manual page 32

SERIES 1200 LIQUID TURBINE METER
User manual
P/N 3-9008-513
Table 2-4: 2818 Dual channel preamplifier configuration
Plug component designator
TB2 - Channel A pickoff (1)
TB3 - Channel B pickoff (1)
Pickoff coils
The Series 1200 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.
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 1200 LTM. Contact the factory or
nearest Daniel service office if service manuals were not received at the time of
purchase or delivery.
LTM flange type
The mechanical connections for a Series 1200 LTM NPS 1 through 4 are standard class 150
and 300 ANSI S.O. R.F. flanges, which are available in stainless steel and carbon. 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.
Choose the appropriate size and material of the flange for their piping requirements.
Choosing an incorrect flange may cause a pressure leak, resulting in death or serious
injury.
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User manual
Operating conditions and specifications
Terminal connections Description
6 TTL out A
7 TTL out B
1 White
2 Red
1 White
2 Red
WARNING
HIGH PRESSURE HAZARD
September 2020
(continued)
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