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HD 2047 – Pt100 Simulator

HD 2047 is a portable instrument specially designed for testing and calibrating
instruments with Pt100 (100Ω a 0°C) type input and voltage/current outputs such as,
for instance, active and passive temperature transmitters, recorders, testers and data
loggers, etc
HD 2047 simulates up to 24 fixed values of a Pt100 sensor in the range from -100°C up
to +500°C, with a 2, 3 or 4 -wire connections. The selection of the value to simulate is
via a rotary switch placed on the front of the instrument. Whatever operating mode you
choose, the Pt100 output is always active

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Product Description

HD 2047 is a portable instrument specially designed for testing and calibrating
instruments with Pt100 (100Ω a 0°C) type input and voltage/current outputs such as,
for instance, active and passive temperature transmitters, recorders, testers and data
loggers, etc
HD 2047 simulates up to 24 fixed values of a Pt100 sensor in the range from -100°C up
to +500°C, with a 2, 3 or 4 -wire connections. The selection of the value to simulate is
via a rotary switch placed on the front of the instrument. Whatever operating mode you
choose, the Pt100 output is always active
HD 2047 can measure with high accuracy voltage/current outputs of any transmitter
connected to the instrument input: -20V…+20V continuous voltage range and 0…22mA
continuous current range. Eventually it can also calibrate and test the functioning of a
passive transmitter by simulating the temperature input, providing power supply to the
transmitter and at the same time reading the current flowing in: all this is performed
without external power supply auxiliary.
The instrument is equipped with three keys:
ON/OFF switches the instrument on and off. Once switched on, HD 2047 is ready for
the voltage measurement.
MODE selects in cycling the type of operation; by pressing the button in succession,
you enable in order:
1. voltage measurement;
2. current measurement;
3. current measurement by 4…20mA loop power supply.
RANGE in voltage or current measurement it allows to select the more suitable full
range and resolution for the measurement under process: -1.999…+1.999,
-19.99…+19.99 e -199.9…+199.9.
HD 2047 is internally protected against any kind of connecting error made by the operator:
it is highly recommended anyway not to exceed voltage/current limits shown in technical
specifications.
The battery signal appears on the display in order to indicate that batteries are low and
need to be replaced.

Operating modes
1) DC voltage input measure
The instrument measures positive and negative continuous voltages up to 20V
maximum amplitude.
Procedure (see fig.1):
• select “input voltage” operating mode by pressing MODE key. The red led
corresponding to “READ V” lights up;
• connect the wires to the sockets, as reported in fig.1;
• select the correct range depending on the voltage, by pressing RANGE key. An
OverRange measurement is indicated by a 1 sign, lighted on the display left part: in
this case you just press RANGE key to pass to the following measuring range.
Note: a) For safety reasons, never apply any voltage superior to 48Vdc to the
sockets.
b) The instrument only measures continuous voltage.
2) DC current input measure
The instrument measures positive and negative current up to 22mA maximum
amplitude.
Procedure (see fig.2):
• select “input current” operating mode by pressing MODE key. The red led
corresponding to “READ mA” lights up;”
• connect the wires to the sockets, as reported in fig.2 observing the correct polarity:
in order to be read, current must be from the bush +
• select the correct range depending on the current, by pressing RANGE key. An
OverRange measurement is indicated by a 1 sign, lighted on the display left part: in
this case you just press RANGE key to pass to the following measuring range.
Note: a) The instrument measures continuous current up to a 22mA maximum
amplitude.
b) The instrument only measures continuous current.
c) The instrument is provided with an internal protection circuit to limit
the current within 25mA.
3) Calibration and passive transmitters test
The instrument can power a 4…20mA loop, measure the current and simulate 24 fixed
values of a Pt100 at the input of a temperature transmitter, with no external power
supply required.
Procedure (see fig.3):
• select “2 WIRE” operating mode by pressing MODE key. The corresponding red led
lights up
• connect the 4…20mA loop wires to the left sockets, as shown in the figure, respecting
the correct polarity; the current supplied by HD 2047 is delivered through the positive
(+) socket
• select the correct range depending on the current, by pressing RANGE key. An
OverRange measurement is indicated by a 1 sign, lighted on the display left part: in
this case you just press RANGE key to pass to the following measuring range
• select the temperature value by turning the rotary switch.
Note: a) The maximum amplitude of the output current equals 25mA.
b) A 14Vdc voltage is supplied to the current loop.
c) In case of 2 or 3-wire connections, do not make jumpers on unused
sockets; it is highly recommended to leave them free.
4) Pt100 sensor simulation
The instrument can simulate 24 temperature fixed values of a Pt100 sensor (100Ω at
0°C, coefficient α=0.003850) with 2, 3 or 4-wire connections. The selection is made
through a rotary switch placed on the front part of the instrument.
Procedure:
• perform the connection as reported in figures 3, 4 or 5 according to the number of
wires;
• select the temperature value by turning the rotary switch.
Note: a) In case of 2 or 3- is highly recommended to leave them free.
b) MODE and RANGE keys have no effects on the resistance selection.
c) The internal protection circuit reduces to approximately 1.2V the
drop on resistances: this means the measuring current has a maximum
amplitude of 20mA.

TECHNICAL DATA (@ 20°C)
GENERAL
Power supply 4 batteries 1.5V, AA size (the input for the 9Vdc external
supplier is provided only upon request)
Autonomy with 1.5V Batteries and
2250mAh capacity
160 h (in “V READ” and “mA READ” operating mode)
30 h @ loop current = 12mA (in “2 WIRE” operating mode)
Low batteries signal The battery sign lights up with a battery voltage of about 3.6V
Operating temperature -5…+50°C
Operating relative humidity 0…90%RH (no condensation)
Weight/dimensions 580 g (without Batteries) / 23x70x230 mm
CONTINUOUS VOLTAGE MEASURE
Measuring range -1.999V…+1.999V: resolution 1mV
-19.99V…+19.99V: resolution 10mV
Accuracy ±1mV: in the range -1.999V…+1.999V
±10mV: in the range -19.99V…+19.99V
Input resistance 1MΩ
Maximum voltage applied to
terminals 48Vcc
CONTINUOUS CURRENT MEASURE
Measuring range 0.00mA…19.99mA: resolution 10μA
0.0…22.0mA: resolution 100μA
Accuracy
±(0.01mA+0.05% of the range): in the range
0.00mA…19.99mA
±0.1mA: in the range 0.0mA…22.0mA
Shunt resistance 20Ω
Overload protection Current limit: 25mA
PASSIVE TRANSMITTERS: POWER SUPPLY/ MEASURE
Measuring range 0.00mA…19.99mA: resolution 10μA
0.0…22.0mA: resolution 100μA
Accuracy
±(0.01mA+0.05% of the range): in the range
0.00mA…19.99mA
±0.1mA: in the range 0.0mA…22.0mA
Shunt resistance 20Ω
Overload protection Current limit: 25mA
Maximum load @20mA 700Ω
Applied voltage 14Vdc
SIMULATING A Pt100
Type of RTD Pt100 (100Ω a 0°C, α=0.003850, EN60751, IEC751, BS1904)
Temperature values 24 fixed values from -100 to +500°C
Precision ±0.05% of the simulated value
Room temperature effect ±5ppm / °C
Maximum power loss 125mW
Maximum load current 20mA
ORDERING CODES
HD 2047: Pt100 Simulator measures current loop and voltage signals coming from
transmitters. The kit consists of instrument equipped with batteries, 2 connection
cables L=600 mm, one is a 4 wires, the other is a 2 wires.

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Manuals and Brochures here.  

HD2047.pdf

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