Liquid Controls IT375 - Manual (Page 3)

Sponsler, Inc. Model IT375 Introduction Pg. 3
1. INTRODUCTION
The Model IT375 Rate Totalizer is a microprocessor-based instrument that accepts a sinewave or pulse input from
Sponsler Company, Inc. Precision Turbine Flowmeters. The instrument displays 5 digits of Flowrate, 7 digits of
Resettable Total and an Accumulated Total. The displayed rate and total values can be in different engineering units.
The instrument is compatible with a wide range of flowmeters. Links on the input board enable the circuit to be
configured for millivolt signals, reed switches, pulse trains and most other signal types.
Although three different versions of the Model IT375 are available, No.3 is the standard.
1. A Battery Powered Version with no outputs.
2. A DC Powered Version with either:
i. high and low flow alarms or
ii. a low flow alarm and pulse output.
3. A Loop Powered Version with 4-20mA output and alarms as above.
The instrument is fully programmable from the front panel; the user can program timebase, K-factors, alarm and 4-20mA
setpoints, decimal placements and filter constants.
The Model IT375 features many improvements, a few are listed below:
The output board can have both ALARMS and a 4-20mA OUTPUT.
The voltage drop across the alarm outputs is only 0.8 VOLTS.
The voltage supply for the DC and loop powered versions can go AS LOW AS 9 VOLTS.
Overall lower current consumption with an improved battery life - 5 YEARS BATTERY LIFE is typical
regardless of the duration of totalizing activity
4-20mA output ACCURACY is 0.05% of span and the LINEARITY is 0.05% of span at 25
°C.
The millivolt input can accept signals AS LOW AS 15mVp-p.
Wide input frequency range - 0.01Hz to 10kHz.
Wide Kfactor range - Kfactors from 0.000001 to 999,999 can be programmed.
Available in a PANEL MOUNT version.
The Model IT375 Rate Indicator and Totalizer conforms to the EMC-Directive of the Council of European Communities
89/336/EEC and the following standards:
Generic Emission Standard EN 50081-1
Residential, Commercial & Light Industry Environment.
Generic Emission Standard EN 50081-2
Industrial Environment.
Generic Immunity Standard EN 50082-1
Residential, Commercial & Light Industry Environment.
Generic Immunity Standard EN 50082-2
Industrial Environment.
In order to comply with these standards, the wiring instructions in Section 9.5 must be adhered to.