ero electronic TMS Mode D'emploi page 25

B) RTD (R R R R R esistance T T T T T emperature D D D D D etector) B) RTD B) RTD B) RTD B) RTD
Type: Pt 100 3 wires connection. Type Type
Type Type
Current: 135 µA.
Current Current Current Current
Line resistance Line resistance: automatic compensation up to Line resistance Line resistance Line resistance
20 Ω/wire with :
- error <+0.1% of the input span for range -19.9 a
99.9 °C.
- not measurable error for the other ranges.
Engineering units: °C or °F programmable. Engineering units Engineering units Engineering units Engineering units
Burnout Burnout NOTE NOTE
Burnout Burnout Burnout: up scale. NOTE NOTE: a special test is NOTE
provided to signal OVERRANGE when input
resistance is less than 15 Ω.
Calibration: according to DIN 43760. Calibration Calibration
Calibration Calibration
STANDARD RANGE TABLE
RTD RTD RTD RTD RTD
Measuring range Measuring range Measuring range Measuring range Measuring range
Type Type Type Type Type
RTD Pt 100 -199 - +500 °C -199 - +999 °F
RTD Pt 100 -19.9 - +99.9 °C -----
C) CURRENT TRANSFORMER INPUT C) CURRENT TRANSFORMER INPUT C) CURRENT TRANSFORMER INPUT
C) CURRENT TRANSFORMER INPUT C) CURRENT TRANSFORMER INPUT
Input current: 50 mA AC. Input current Input current Input current Input current
Read-out Read-out: selectable among 10, 25, 50 or 100 A. Read-out Read-out Read-out
Resolution Resolution Resolution: Resolution Resolution
- 0.1 A for 10 A range.
- 1 A for all the other ranges.
Active period Active period: Active period Active period Active period
- for relay output: NO or NC programmable
- for SSR drive output: logic level 1 or 0
programmable.
Minimum time duration of the Minimum time duration of the Minimum time duration of the active period: active period active period
Minimum time duration of the Minimum time duration of the active period active period
50 ms.
CONTROL ACTIONS CONTROL ACTIONS CONTROL ACTIONS CONTROL ACTIONS CONTROL ACTIONS
Control actions Control actions: PID + SMART Control actions
Control actions Control actions
Proportional band Proportional band Proportional band Proportional band: from 1.0 % (for heating Proportional band
action) or 1.5 % (for heating and cooling action)
to 99.9 % of the input span.
Setting Pb = 0 an ON/OFF control is performed.
Hysteresis Hysteresis (for ON/OFF control action): from 0.1 Hysteresis Hysteresis Hysteresis
% to 10.0 % of the input span.
Integral time Integral time Integral time: from 10 seconds to 20 minutes; Integral time Integral time
resolution 10 second. Setting a value upper than
20 minutes the integral action will be excluded.
Derivative time: from 0 to 9' 59''. Derivative time Derivative time Derivative time Derivative time
Integral preload: Integral preload: Integral preload: Integral preload: Integral preload:
- from 0 to 100% for one control output.
- from -100 to 100% for two control outputs
Main output cycle time Main output cycle time
Main output cycle time Main output cycle time: from 1 to 200 s. Main output cycle time
Cooling cycle time Cooling cycle time Cooling cycle time Cooling cycle time Cooling cycle time: from 1 to 200 s
Relative cooling gain Relative cooling gain Relative cooling gain Relative cooling gain: from 0.20 to 1.00 Relative cooling gain
NOTE: the Pb, ti, td and rCG parameter may be NOTE NOTE NOTE NOTE
limited when the SMART function is enabled.
Overlapping/dead band: from - 20 % to 50 % Overlapping/dead band Overlapping/dead band
Overlapping/dead band Overlapping/dead band
CONTROL OUTPUTS CONTROL OUTPUTS CONTROL OUTPUTS CONTROL OUTPUTS CONTROL OUTPUTS
Type: Type:
Type: Type: time proportioning Type:
Output updating time: 500 ms. Output updating time Output updating time Output updating time Output updating time
Output resolution Output resolution Output resolution: 1% of the output span. Output resolution Output resolution
Action Action
Action: direct or reverse programmable. Action Action
Output power limiter: Output power limiter Output power limiter Output power limiter Output power limiter
- from 0.0 to 100.0 % for one control output.
- from -100.0 to +100.0% for two control outputs
This function may be operative at instrument power
up for a programmable time (to avoid thermal shock
or to pre-heat the plant).
GB GB GB GB GB 22