D20 is a microprocessor based controller series with digital controls and LCD display and cost effective. Whilst, technical characteristics remain exactly the same, D20 features two enclosure versions: D20din for DIN 6 modules mounting and DR20 for panel mounting. Available on request model DC20din with plastic enclosures for wall mounting and 2XDR20 SERIES dual controller enclosed into IP65 housing.
Also available for this series: Temperature controller – Volumetric Metering controller – Instant flow reader
| D20din |
|
DR20 |
 |
 |
| D20din enclosure: |
ABS plastic, DIN 6 modules |
DR20 enclosure: |
Anodised aluminium DIN 437000 |
| Dimensions: |
106x90x58 mm |
Dimensions: |
96x96x118 mm |
| DC20din |
2XDR20 |
 |
 |
| DC20din wall housing: |
Plastic ABS IP65 |
2XDR20 enclosure: |
Plastic ABS IP65 |
| Dimensions: |
220x210x100 mm |
Dimensions: |
240x200x115 mm |
| CONTROL MODES |
| ON-OFF mode via relay output: two set-points ON/OFF with relay output, contact free, will activate a constant / ON-OFF mode dosing pump or other equipment. |
| Advanced programming functions: it allows to program two threshold points to open a working range around set-point 1 and 2 with Hysteresis regulation. |
| Pulse proportional mode on set point 2: proportional pulse (timed) proportional output on set-point 2, will activate a constant / ON-OFF mode dosing pumps or other equipment. |
| Proportional output 4÷20 mA: 4÷20 mA output to drive either a chart recorder or dosing pump suitable to process a remote mA signal on set-point 2. |
| Response Delay: it will delay the pump injection for time selectable, thus allowing the right time for the electrode to get polarized. |
| Temperature compensation: manual only for PH and CD controllers. |
| TECHNICAL CHARACTERISTICS COMMON TO ALL VERSIONS |
|
D20din-PH
DC20din-PH
DR20-PH |
D20din-CL
DC20din-CL
DR20-CL |
D20din-RX
DC20din-RX
DR20-RX |
D20din-CD
DC20din-CD
DR20-CD |
Range: |
0÷14.00 pH |
0÷10.00 ppm |
0÷1000 mV |
0÷10.00 mS |
0÷1000 µS |
0÷100 µS |
Resolution: |
0,01 ph |
0,01 ppm |
1 mV |
10 µS |
1 µS |
0,1 µS |
Hysteresis: |
0,05 pH |
0,05 ppm |
5 mV |
50÷100 µS |
5÷10 µS |
0,5÷1,00 µS |
Connections: |
BNC |
Wiring clamp |
BNC |
Connections wiring clamp |
Input probes: |
pH (1012Ω)
electrode |
Amperometric chlorine cell |
Rx (1012Ω)
electrode |
CD probe
constant K1 |
CD probe
constant K5 |
CD probe
constant K5 |
Linearity, stability and repeatability: |
0,2% |
Power supply: |
230 Vac standard; upon request 24 V ~/115V~ |
Working temperature: |
0÷50 °C |
Protection rating: |
IP65 (DC20) – IP54 (2xDR20) - IP20 (DR20/D20DIN |
Front controls panel: |
Polycarbonate adhesive |
NOTE: FWT controllers are NOT provided with probes which are available upon request.
IMPORTANT: D20 series has been designed according FWT sensors. FWT declines any responsibility in case are used with other sensors
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