


Signal Converter
(resistance & RTD inputs) 
Converts inputs from resistance transducers e.g. variable resistances, potentiometers, resistance temperature detectors (RTD), platinum resistance thermometers (PRT), into standard voltage or current process signals. Input and output are not isolated from each
other. 
Converter 
1071 

Signal converter data sheet 

Signal converter user guide 

Set Point
Generators
Also see
C1666>

These units provide a
current or voltage output, the magnitude of which is controlled either by:
• a front panel mounted control (adjustable type). • a remote
setpoint with the setpoint potentiometer and dial supplied loose for remote
mounting e.g. in a control panel or enclosure door or • a fixed output
which is internally set to the level required. 
Adjustable 
1071A 

Remote setpoint 
1071A/RP 

Fixed 
1071/F 

Setpoint generator data sheet


Bridge Amplifier

This unit accepts
voltage signals from 010mV to 0100mV from bridge type transducers (e.g. load
cells). The gain is user selectable. Optionally the unit can be calibrated for
voltages from 01V to 010V. An isolated and stabilised transducer power supply
is provided. 

1071B 

Bridge amplifier data sheet 

Bridge amplifier user guide 

Twowire Trip Amplifier

This unit requires no external supply but derives its power from the
420mA input signal. A normally open contact and a normally closed contact are
provided. 


1072/2W 

2 wire trip amplifier data sheet 

Signal Isolator 
This unit may be
used as a signal repeater, conditioner, converter and provides isolation between the input
and output signals. The unit can convert a wide range of signals: current to
current, current to voltage, voltage to voltage, voltage to current. Also available as a signal inverter e.g. a 420mA input giving 204mA
output. 

1073A 

Signal isolator data sheet 

Analogue to
Frequency Converter

Otherwise known as an
integrator when combined with a counter, this unit will convert a voltage or
current input signal into pulses with respect to time; the pulse rate being
proportional to the magnitude of the input signal. Output may be pulse, open
collector or for an electromechanical counter. 

1075A 

Analogue to frequency converter data sheet 

Analogue Summator
/ averager/ subtractor

This unit will sum
together  or subtract  up to three voltage or current input signals. The
output signal may be current or voltage and will be proportional to the sum or
difference of the input signals. This unit will perform an averaging function
with equal input ranges. See 1126A for number of inputs greater than three. 
2 Input Version 
1076A/2 
3 Input Version 
1076A/3 

Summator / subtractor data sheet 

Signal Converter Square
Root Extractor 3/2 Law 5/2 Law

Provides a voltage or
current signal output which is proportional to one of the following
functions: • Square root of the input signal (e.g. for DP
transmitter) • 3/2 law (e.g. for flowrate measurements from flume or
weir) • 5/2 law (e.g. for flowrate measurements form 'V' Notch
weir) Input and output signals may be current or voltage and the unit will
convert to signals of different ranges and types. The unit provides an optional
transducer excitation supply. 
Square Root Extractor 
1077B/1 
3/2 Law 
1077B/2 
5/2 Law 
1077B/3 

Square root extractor data sheet 

Square root extractor user guide 

Current loop Power
Supplies (linear)

Rising Output
Characteristic  The voltage output of this unit rises with the load
current. This enables loads to be driven in series with large resistances such
as transmission lines or through zener barriers. 2432V & 3648V types
available. 

1078 

Power supply data sheet 

General purpose Power
Supplies (switched mode)

A range of general purpose
instrumentation power supplies for powering twowire transmitters operating on
420mA signals or powering 24V signal conditioning modules. •
Universal input supply 85260VAC • Highefficiency, cool
running 
Single Output
 available in the following versions: 24V @ 100mA, 36V @ 50mA & 48V
@ 50mA 

1079s 

Dual Output 
2 x 24 V @ 40mA 

1079s/2 
Power supply data sheet Both
types 


Frequency to Analogue
Converter

The 10710B provides
an output current or voltage which is proportional to the frequency of
alternating voltage or pulse input signal. Accepts input frequency ranges from
less than 01Hz to 010Khz. This instrument has many uses in applications
including flowmetering and rotational measurements. Optional PC software
enables range changing, e.g. to suit a turbine meter replacement, and
optimisation of digital filtering to suit site conditions. 

10710B 

Frequency to analogue data sheet 

Frequency to analogue user guide 

download
configuration software 

Multiplier 
Provides an analogue
output signal proportional to the multiplication of two analogue input signals.
The input signals may be of differing types e.g. current / voltage, true /
raised zero, etc. NB The multiplier can also be made to function as a
squarer. 
Multiplier 
10712A 

Multiplier data sheet 


Multiplier user guide 


Rate Limiter 
A range of
instruments providing functions which control the rate of change in the output
signal for a change in input signal. These units may also provide signal
conversion. The time constant is adjustable by a front panel mounted dial.
Times to FSD are calibrated to order and are typically available from 060s up
to 0120s. 

Rate limiter data sheet for all types 




Slow Up Fast Down
Response Unit: the response curve is an exponential and the time to steady
state output is the same for any magnitude of change of a rising input signal.
However for a negative going change in input signal, the output response is
virtually instant. 


10717/0 




Rate Limiter:
the response curve is linear giving a ramp with a fixed rate of change. The
effect on the output is a response time proportional to the magnitude of the
input signal change. 


10717/1 




Slow up, Slow Down
Response Unit: the reponse curve is similar to the 10717 /0 but the rate
of change is also controlled for negative going input signals 


10717/2 

Rate of Change
Monitor 
This unit provides an
output signal, with magnitude proportional to the rate of change of the input
signal. 

10718 

Rate of change monitor data sheet 

Rate of change monitor user guide 
