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Delta-controls DPT-2000 Manual de usuario Pagina 15

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13 IOM-DPT-A: FEB 2014
The value of transmitter minimal supply voltage can be calculated from the following formula:
Umin = 12 + 0,023 x Ro [V] for transmitter operating without LCD display backlight
(or read from the drawing below)
Umin = 15 + 0,023 x Ro [V] for converter operating with LCD display backlight.
(or read from the drawing below)
Transmitters made in Ex version are delivered with display backlight switched off. The user can switch
the backlight on by himself.
0 250 500 750 1000
10
15
20
25
30
35
40
45
Ro[ ]
Vmin [V]
Umin = f(Ro) z podświetleniem
0 250 500 750 1000
10
15
20
25
30
35
40
45
Ro[ ]
Vmin [V]
Umin = f(Ro) bez podświetlenia
50
55
50
55
1250
1500 1750
1250
1500 1750
Supply voltage dependence on current loop resistance
Safe working area (grid) upper colour area.
Voltage for insulation testing 500 VAC or 750 VDC, see p.8.3.
Excess voltage protection see p.8.3.
List of current alarms
Alarm Type
Value of Alarm Current
Alarm Type
Value of Alarm Current
NORMAL LOW
3,75 mA
CUSTOM (value of alarm
current is defined by user)
Value of alarm current in
interval
3,6 mA 23 mA
NORMAL HIGH
21,6 mA
NAMUR LOW
3,6 mA
LAST VALUE
(transmitter does not
update analog exit)
Alarm current value is equal
to the current value in the
time preceding the event
which giving an alarm.
NAMUR HIGH
21,0 mA
5.2. Metrological parameters.
Additional voltage damping 0...30s
Total error of transmitter (digital value) ± (0,05 + 0,05%·z + 0,001·|t|) °C for sensor Pt100
± (0,5 + 0,05%·z)°C for sensor K and t 375°C
± (0,5 + 0,05%·z + 0,002·(t-375))°C for sensor K and t
>375°C
Additional analogue output error ± 0,04%·z
where:
|t| - modulus of measured temperature in °C
t - the value of measured temperature in °C
z - the range width of transmitter in °C
5.3. Measurement ranges.
Sensor type
Min. measuring range
Nominal range
Calibrated range
Pt 100
10 °C
- 200 ... 550 °C
0 ... 100 °C
Ni-Cr-Ni /K/ *
10 °C
- 40 ... 550 °C
0 ... 300 °C
* Recommended for measurements with strong vibrations.
i
Ro[Ω]
Ro[Ω]
Vmin [V]
Vmin [V]
Umin = f(Ro) without display backlight
Umin = f(Ro) with display backlight
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