62
Startup and Basic Operation
RTD and Resistance Simulation
MC5P mimics the RTD or the resistor to be measured by the instrument under test. The
instrument under test generates the current for the resistance measurement. MC5P con-
trols the voltage across its terminals so that the resistance (voltage to current ratio) cor-
responds to the simulated temperature or resistance. MC5P can simulate resistance
between 1 to 4000 ohm.
RTD and resistance simulation terminals are located in the
ET
module.
Required settings
Options/description
Quantity
RTD-Temp.
(for RTD simulation)
Resistance
(for resistance simulation)
Funct/Port
ET: RTD(sim)
(for RTD simulation)
ET: R(sim)
(for resistance simulation)
Sensor Type
Available RTD sensors. Only needed
when doing RTD simulation.
The correct resistance value is between the
resistance simulation terminals of the cali-
brator. Use of 2-, 3- or 4-wire connection is
up to the receiver instrument. Use only the
two leftmost
R, RTD
terminals with every
wiring option. Connect the possible third
and fourth wire according to the require-
ments of the connected instrument, but use
only the two leftmost
R, RTD
terminals.
Notes.
In RTD and resistance simulation MC5P
monitors the resistance measurement cur-
rent. If the current is too high, it cannot
simulate the right resistance value. In that
case it shows the message “
H.CURR
”.
Respectively, if the measurement current
is so low that it may affect the accuracy,
the message “
L.CURR
” is displayed.
Accurate operation of the simulation elec-
tronics requires that the current supplied
by the instrument under test does not vary
rapidly. The simulation result is not accu-
rate if the instrument under test uses AC
current. If the instrument under test uses
pulsed measurement current it should wait
a few milliseconds before starting the mea-
surement after setting the current.
Next…
Thermocouple Measurement (Temperature)
on page 47
RTD Measurement (Temperature)
on page 46
Resistance Measurement
on page 40
Special Generations
on page 65
Calibration
, see Part D.
ELECTRICAL MODULE
FOR MC5P
S/N
M U L T I F U N C T I O N C A L I B R A T O R
MC5P
E
?
ET
ELECTRICAL AND TEMPERATURE MODULE
FOR MC5P
S/N
Max 60 VDC/30 VAC
Max 60 VDC
Max 30 VAC
OUTPUT
SENSOR MEASURE & SIMULATE
INTERNAL REFERENCE JUNCTION
FOR THERMOCOUPLES
T/C, Low V
4-w meas
R, RTD
V,
I
,
3 & 4-w meas
Open
Close
Open
Close
T/C INT. RJ
T/C
WIRES
ONLY
(ENV), ENVIRONMENTAL
TEMPERATURE SENSOR
(EXT), EXTERNAL
PRESSURE MODULE
MEASURE
+24V
I
meas/sink
HART
®
2-w xmtr
V, ,
Low V
Com
Summary of Contents for MC5P
Page 36: ...28 General Empty ...
