Specifications BL932700 Range ±1000 mV Resolution 1 mV Accuracy (@25°C/77°F) ±5 mV Calibration manual, with CAL trimmer Dosing Relay maximum 2A (fuse protected), 250 Vac, 30 VDC Dosing Selection reducing or oxidizing, selectable on the back panel contact open=reductant dosage=relay ON if measure > setpoint contact closed=oxidant dosage=relay ON if measure < setpoint Setpoint adjustable from -1000 to 1000 mV Overtime adjustable, from 5 to approximately 30 minutes Recorder Output 4 to 20 mA, accuracy ±0.20 mA, 500 Ω maximum load Input Impedance 1012 Ohm Power Supply BL932700-0: 12 VDC adapter (included); BL932700-1: 115/230 VAC; 50/60Hz Dimensions 83 x 53 x 99 mm (3.3 x 2.1 x 3.9’’) Weight BL932700-0: 200 g (7.1 oz.) BL932700-1: 300 g (10.6 oz.) Ordering Information BL932700-0 (12 VDC) and BL932700-1 ( 115/230 VAC) are supplied with mounting brackets, transparent cover and instruction manual. Recommended Probe HI2001 PVDF body ORPelectrode with 1/2” NPT thread, BNC connector and 3 m (9.8’) cable for continuous flowthru monitoring (not included). BL932700 ORP Mini Controller with 4-20 mA Recorder Output • Large Clear LCD • Fire Retardant Casing • BNC Connection • Splash-Resistant Cover The BL932700 is a compact, ORP process controller designed for applications where space or cost is important. The device may be used with any ORP electrode with a standard BNC connector. Users may choose from automatic or manual dosing modes allowing for easy maintenance and troubleshooting. Adjustable Dosing Relay The BL932700 features a dosing relay which may be configured to dose above or below a user programmable mV setpoint. Selectable Overdose Protection The mini controller may be programmed to deactivate a valve, pump, or connected device if its activation continues over a selected time; adjustable from 5 to 30 minutes. Relay Control Override With the flick of a switch the mini controller's relay can be disabled (OFF), placed in control (AUTO), or be activated for manual operation (ON) which is useful for priming a dosing pump. Analog Output Communication The BL932700 features a 4 - 20 mA analog output for connection to a data logger, chart recorder, or other device. External Disabling Feature A normally open contact may connect to a level controller or flow monitor. This safety feature may be used to prevent continuous dosing in the event of specific or undesired system conditions. Matching Pin Connection A built-in matching pin helps protect the sensor from ground loop effects that may lead to erratic readings or system damage. See HI2001 ORP probe on page 15.88; ORP solutions begin on page 2.170; see rear connections on page 15.96 15 Process Instrumentation 15.87 www.hannainst.com | controllers
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