Introduction 3
1. INTRODUCTION
The Model 104A Rate-Totaliser is a microprocessor based instrument designed to
measure a 4-20mA signal from flowmeters and pressure transducers.
The instrument can be programmed to display directly in engineering units
and includes features such as linear or square law calculation, integration
and digital filtering.
Rate, Total and Accumulated Total can be displayed in engineering units on the
large LCD display. A front panel switch selects the function for display and a
Reset button allows the Total to be reset to zero.
The instrument is fully programmable, with all calculation constants set via the
front panel switches and stored in a non-volatile memory which will retain data
indefinitely. The user can program span, filtering levels, display resolution and
cutoff point.
The instrument is powered from a 4-20mA input signal and therefore, requires no
external power.
The Model 104A Rate Totaliser 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 7.5
must be followed.
