Two pumps or electro-valves can be wired directly to the controller and be powered through the terminal. The operator can adjust two independent proportional settings for pH and conductivity. The time cycle is adjustable from 0 to 90 seconds, while the proportional band is 0 to 2 for both pH and EC. A matching pin/ground probe can be connected to the appropriate terminals to eliminate interference and prolong the pH electrode’s life.
HI-9913 provides for an alarm relay which is activated in several circumstances. These include when the pH is below the set point by the operator-adjustable threshold of pH 0.5 to 2.5, or EC exceeds the set point by a value in the 0.5 to 2.5mS/cm range. The alarm goes off if the pH and/or conductivity are not corrected within the operator-determined time frame of 1 to 10 minutes. The alarm can be turned off during maintenance.
Fertilisation status can be ascertained from a distance through dosage and alarm LEDs.
HI-9913 accepts pH electrodes with BNC and conductivity probes with DIN connectors.
Hanna Instruments Industrial Grade pH and Conductivity Controller
#Grup produk P107658760
Spesifikasi
| Range (pH) | 0.00 to 14.00; 0.00 to 10.00 mS/cm |
|---|---|
| Resolution (pH) | 0.01; 0.01 mS/cm |
| Accuracy (pH) | ±0.02; ±2% F.S. EC |
| Calibration | Through \"OFFSET\" and \"SLOPE\" trrimmers for pH, and \"ZERO CAL\" and \"SLOPE CAL\" for EC |
| Alarm Contact | Terminals can be configured as normally open or normally closed (isolated output max. 1A, max 240V, resistive load, 1,000,000 strokes). |
| Case Material | Fibre-reinforced, self-extinguishing ABS |
| Dimensions (mm) | 221x181x86 |
| Dosing Terminals | Two sets of independent terminals (115 to 240V, max 2A, 1,000,000 strokes) are activated whenever pH exceeds the pH set point and/or conductivity falls below the EC set point |
| EC Temperature Compensation | Automatic, 0 to 50°C with β=2%/°C |
| Environment Temperature (°C) | -10 to 50 (14 to 122°F); RH max 95% non-condensing |
| Input Impedance (ohm) | 10¹² |
| Power Supply (V) | 115/230 ac ±10%; 50/60 Hz |
| Probe | Any combination pH electrode with a universal BNC connector and Hanna conductivity four-ring potentiometric probe with built-in temperature sensor and Din connector (not included) |
| Proportional Control | Two independent controls; pH from 0.0 to 2.0 and conductivity (EC) from 0.0 to 2.0 mS/cm with two separate time cycles from 0 to 90 seconds |
| Set Point | From 4.0 to 7.0 pH and 1.0 to 4.0 mS/cm (EC) |
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