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Enable configuration and calibration as described in the
manual in the Hardware Configuration section (jumpers "S9"
and "S8" closed).
In phase CFG/2 (Configuration 2) set the type of input probe:
parameter tyP:
tyP = 0,1,2,3,4,5 for thermocouples J,K.N.S R,T
tyP = 6,7
for resistance thermometers Pt100
typ = 8,9,10
for linear input 0 ..50mV
typ = 12,13,14
for linear input 10 ..50mV
tyP = 11
for resistance thermometers Pt100 special
case -19.9. .99.9 (199.9)°C with hardware modification.
Quit phase CFG/2; the instrument returns to normal operation.
Proceed to calibration with the instrument ON for at least 5-10
minutes. Calibrate as follows:
A) Calibration of thermocouples J,K,N,S,R,T and linear
input 0-50mV10-50mV.
A.1) Keep the F key pressed until CAL appears on the display;
release F
A.2) Connect a 50.00mV signal from a calibrator between
terminals 1 (+) and 3 (-).
A.3) Press F: the display shows message CAL/50; wait about
6 seconds.
A.4) Press F: the display shows message t.A/25.0; with
the raise and lower keys, set the real value of the room
temperature in which you are performing the calibration
procedure (example: t.A = 23.7°C). You do not have to set the
room temperature for linear inputs
A.5) Press F: the display shows brd/valore; set the hardware
model code (see brd table in CFG.2 phase).
A.6) Press F to end the calibration procedure; the instrument
will return to normal operation.
If the 50mV signal remains in input, the display shows
message _Hi for tyP = 0,1,2,3,4,5 (thermocouples) or
maximum scale for tyP = 8,9,10,12,13,14 (linear scale).
Proportional Action: action in which the contribution on the output
is proportional to the deviation in input (deviation is the difference
between the controlled variable and the value you want).
Derivative Action: action in which the contribution on the output is
proportional to the speed of variation of the deviation in input.
Integral Action: action in which the contribution on the output is
proportional to the integral in time of the deviation in input.
Influence of Proportional, Derivative and Integral actions
on response of process under control.
• Increasing the proportional band reduces oscillations but
increases deviation.
• Reducing the proportional band reduces deviation but
causes oscillations of the controlled variable (excessively low
proportional band values make the system unstable)
• SOFTWARE ON/OFF FUNCTION
Turning off: you can deactivate the instrument by
simultaneously pressing the F and Lower keys for 5 seconds.
The instrument goes into "OFF" status, similar to shutdown
status except that power is not turned off. During this "OFF"
status, the display is off, with the decimal point flashing on
the second digit of the lower display to indicate the presence
of line voltage; all outputs (control and alarms) are in OFF
status (logic level, 0, relays de-energized), and all instrument
functions are inhibited except for the "Turn-on" function".
80343I_MHW_1000_07-2011_ENG
8 • CALIBRATION
The thermocouple and linear input is now calibrated.
B) Calibration of Pt100 2/3 wires resistance thermometer
input (tyP =6 or 7).
B.1) Keep the F key pressed until CAL appears on the display;
release F
B.2) Press F; the display shows message CAL/18; between
terminals 1 and 3, connect a resistance of 18.49 Ohms or a
calibrator signal of -200.0°C; short circuit terminals 3 and 4;
wait about 10 seconds
B.3) Press F: the display shows message CAL/250; between
terminals 1 and 3, connect a resistance of 250.00 Ohms or a
calibrator signal of +408.6°C; keep the short between terminals
3 and 4; wait about 10 seconds.
B.4) Press F: the display shows brd/value; set the hardware
model code (see brd table in CFG.2 phase).
B.5) Press F to end the calibration procedure; the instrument
will return to normal operation. If the 250 Ohm resistance
remains in input, the display shows message _Hi. The Pt100
input is now calibrated.
D) Calibration of CT (ammeter) input for HB alarm.
The procedure is enabled only if the hardware accepts this
type of input (see brd code in CFG.2).
D.1) Keep the F key pressed until Hb.C appears on the upper
display. Between fastons 6 and 7, connect a 5A AC signal.
D.2) Press the F key: the display shows message Hb.C/5; wait
about 6 seconds.
D.3) Press the F key to end the CT input calibration procedure;
the instrument will return to normal operation. If the 5A current
remains in the CT input, the current value (accessible with
key F) will show the set full scale (parameter Hb.S in phase
CFG/1). The CT input is now calibrated.
9 • CONTROL ACTIONS
• Increasing derivative action corresponds to an increase of
derivative time, reduces deviation and avoids oscillations up
to a critical value of derivative time, beyond which deviation
increases and extended oscillations occur.
• Increasing integral action corresponds to a reduction of
integral time, tending to cancel deviation under normal working
conditions between the controlled variable and the value you
want (setpoint).
If the integral time value is too long (weak Integral Action),
there may be persistence of the deviation between the
controlled variable and the value you want.
In this case, you should reduce the proportional band and
increase the Derivative and Integral Actions until you get the
result you want.
10 • FUNCTIONAL NOTES
Turning on: press the "F" key for 5 seconds to switch the
instrument from "OFF" to "ON" status. The instrument will run a
setup cycle identical to a power-on, with flashing of all display
segments for about 5 seconds, followed by normal functioning
according to the HW and SW configuration. If the instrument is
configured with self-tuning or soft start enabled, the appropriate
procedure will be run as if following a power-on. If line voltage
is cut during "OFF" status, at the next power-on the instrument
will go to the same "OFF" status ("ON/OFF" status is saved).
The function is normally enabled. The function is disabled by
setting parameter Pro = Pro + 8 in phase CFG2.
9
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