The Digital Flow Calibrator combines the simplicity & versatility of a soap film bubble meter with the speed and accuracy of a microprocessor. With hands free operation, you can still see the bubble, but you also have precision of a digital display with accuracy of a quartz clock. No more tedious bubble formation, bubble watching, timing & flow-rate time calculation. The 

DFC-1 accurately calibrates air sampling pumps (vacuum or pressure), rotameters, orifices etc. quickly & reliably with accurate & reproducible results. 

FEATURES 
 

PRINCIPLE OF OPERATION : The DFC-1 gas flow calibrator operates on the principle of traditional soap film flow meter which has been automated with the use of high technology infrared sensors, quartz timing & microprocessor intelligence to provide instant digital read out of gas flow rates. A soap bubble is used to trace the gas flow through a fixed volume high precision glass flow-cell. When the liquid soap bubble passes through the first sensor, it activates a quartz timer, which stops when the soap bubble passes through the second sensor. The microprocessor then calculates the flow rate & instantly displays it on a liquid crystal display. 

SPECIFICATIONS : 

Measuring Range : 1.0 cc/min to 5.00 Ipm with Auto Ranging facility to cover full scale range of 199.9 ml/min., 1999 ml/min., & 5.00 Ipm. 

Display : 3½ digit Liquid Crystal Display with additional indication of LOW-BAT and various Self-Diagnostic System-Errors. 

Function : ON RESET - Key to reactivate the system after Auto-Shutoff (in 2 minutes when not in use) 

MULTI SINGLE - Modes to effect the measurement continuously for multiple bubble or to limit it to the first bubble. 

AVERAGE - Mode to average the last four readings. 

Accuracy : ± 2010 of Reading 

Flow Cell : Precision, Small-Volume Glass flow cell that is vertically adjustable to provide faster results for Low-Flow applications. It also accepts any type of soap solution. However for higher flow measurement, we recommend our standard solution. 

Automatic Bubble : This innovative bubble formation mechanism provides adjustable and continuous stream Formation of bubbles for hands free operation. A large reservoir of soap solution provides long uninterrupted operation without cumbersome process of re-filling after every few minutes. 

Power : 

• Mains Operated Model - 230 V AC 
• Battery Operated Model - 6 V Dry Cell or 
• ON indication on Front Panel. Rechargeable batteries Optional at extra charge. 

Dimensions : 20 (W) x 15 (D) x 23 (H) cms. 

Printer : Optional Impact type, Numeric or Alpha-numeric compact, Portable Printer for permanent record. 

Carrying Case : Optional corrosion resistant carrying case to accommodate, DFM-1, soap solution, printer & battery charger.