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Idiomas disponibles
Idiomas disponibles
Calibrating the voltage input (calibration procedure to be carried
out at a laboratory by skilled workers)
- Press the PRG key until the message P6 appears on the display.
- Press the CAL key four times; the message CAL appears at the top of the
display and the mV value of the input at the bottom.
- Simulate a voltage of 0 mV at the input (if the value is between ±25 mV the zero is
calibrated, otherwise the full scale value is calibrated).
s
t
- Using the
and
keys, adjust the voltage value so as to have the correct volta-
ge value on the display.
- Press the SET button, the ON symbol appears on the display to indicate that the
instruments is measuring the voltage of the input using the second scale of mea-
surement.
s
t
- Using the
and
keys adjust the voltage value so as to have the correct voltage
value on the display.
- Press the set button, on the display the symbol ON disappears
- Simulate a voltage of 450 mV at the input, corresponding to the full value of the
first scale.
s
t
- Using the
and
keys, adjust the voltage value so as to have the correct volta-
ge value on the display.
- Simulate a voltage of 1800 mV at the input, corresponding to the full value of the
second scale.
s
t
- Using the
and
keys, adjust the voltage value so as to have the correct volta-
ge value on the display.
- Press OK to confirm.
Pt100 probe calibration (100 Ω at 0°C) (calibration procedure to
be carried out at a laboratory by skilled workers)
- Connect the Pt100 probe to the instrument. Press the PRG key until the message
P6 appears on the display.
- Press the CAL key; the message CAL appears at the bottom of the display and
the temperature is shown at the top.
- Immerse the Pt100 probe and a precision thermometer for reference in the zero
calibration bath. Wait long enough for the reading to become stable.
s
t
- Using the
and
keys, adjust the value of the temperature measured by the
Pt100 probe so that it corresponds with the value on the reference thermometer.
- Immerse the Pt100 probe and a precision thermometer in the full scale calibration
bath. Wait long enough for the reading to become stable.
s
t
- Using the
and
keys, adjust the value of the temperature measured by the
Pt100 probe so that it corresponds with the value on the reference thermometer.
- Press OK to confirm.
N.B.: If the temperature shown by the instrument is between ±12°C, the instrument
calibrates the probe offset, otherwise it calibrates the gain.
Calibrating the analog output (calibration procedure to be carried
out at a laboratory by skilled workers)
- Press the PRG key until the message P6 appears on the display.
- Connect a precision milliammeter to the analog output.
- Press the CAL key twice; the message CAL appears at the top of the display and
the message 4.0 at the bottom, indicating calibration at 4 mA.
s
t
- Using the
and
keys, adjust the value of the output current so as to have an
indication of 4.0 mA on the precision milliammeter.
- Press the CAL key; the message CAL appears at the top of the display and the
message 20.0 at the bottom, indicating calibration at 20 mA.
s
t
- Using the
and
keys, adjust the value of the output current so as to have an
indication of 20.0 mA on the precision milliammeter.
- Press OK to confirm.
Display
Symbol
description
°C
the value shown is in °C.
°F
the value shown is in °F.
pH
the unit of the value shown is pH.
mV
the unit of the value shown is milli Volts.
A
the relay A is in closed status.
B
the relay B is in closed status.
ON
the value shown corresponds to the closing thresholds of the contacts
of relay A or B.
OFF
the value shown corresponds to the opening thresholds of the con-
tacts of relay A or B.
Error signal
OFL - Warning which appears during measurement when the value to be displayed
is out of scale.
E1
- Error warning which appears during pH calibration to indicate that the offset
value of the electrode is too high in absolute value.
E2
- Error warning which appears during pH calibration to indicate that the diffe-
rence between the mV readings given by the two buffer solutions used for
calibration is too great.
E3
- Error warning which appears during pH calibration to indicate that the mV
readings given by the two buffer solutions used for calibration are too close
(about 50 mV at 25°C).
E4
- Reading error on the EEPROM.
E5
- Error warning indicating that the slope calculation gives a value 20% lower
than the nominal value or gives a negative value.
E6
- Error warning indicating that the slope calculation gives a value 150% higher
than the nominal value.
Order code
DO 9785T:
pH transmitter 4÷20 mA passive or active, power supply 24
Vac with double display 96x96 mm, for panel mounting.
DO 9765T:
pH transmitter 4÷20 mA passive or active, power supply 24
Vac with double display 122x120, for use on the field.
HD 882 M100/300:
Temperature probe with Pt100 sensor, miniature head, shaft
∅ 6x300 mm.
HD 8642:
Buffer solution 4.01 pH.
HD 8672:
Buffer solution 6.86 pH.
HD 8692:
Buffer solution 9.18 pH.
KPI 10
Combined industrial electrode, S7 PG13.5 connector, refilla-
ble, glass body, Ag/AgCl sat KCl ∅ 12x120 mm, temperature
0÷130°C, porous Teflon fitting.
KPI 11
Combined industrial electrode, S7 brass 1" connector, refilla-
ble, Rytron body, Ag/AgCl sat KCl, temperature
0÷100°C, porous Teflon fitting.
KPI GB 210
Electrode for biotechnology, S7 PG13.5 connector, glass
body, gel, ∅ 12x210 mm, temperature 0÷135°C, max 10 bar.
CP5
Extension for connecting the electrode to the DO 9403T-R1
or to the DO 9765T (S7-wire-TERMINAL BOARD) L=5m.
CP5S
Extension for connecting the electrode to the DO 9785T
(BNC-S7) L=5m.
pH
pH
Pt100
4 wires
15
14
13
12
temp
SHORT CIRCUIT BETWEEN 10 AND 11 IF NOT CONNECTED
*
Fig. 1
pH
pH
Pt100
2 wires
15
14
13
12
temp
Fig. 2
24 Vac
or
230 Vac
1
2
1
2
Fig. 3
24 Vac
or
230 Vac
≈
=
11
GND
10
4...20mA
9
mA
8
B
7
6
5
A
4
3
1
2
11
10
4...20mA
9
V+
8
7
B
6
5
A
4
3
Min 9Vdc
V
11
A
10
Regulator
9 4...20 mA
Min 9Vdc
V
11
10
A
9
Regulator
4...20 mA
*
24 Vac
0 Vac
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