Specifications BL981411 Range 0.0 to 14.0 pH Resolution 0.1 pH Accuracy (@25°C/77°F) ±0.2 pH Calibration manual, through CAL (offset) trimmer Dosing Relay maximum 2A (fuse protected), 250 Vac, 30 VDC Dosing Selection acid or alkaline contact open=acid dosage=relay ON if measurement > setpoint contact closed=alkaline dosage=relay ON if measurement < setpoint Setpoint adjustable from 0 to 14 pH Overtime adjustable, from 5 to approximately 30 minutes Input Impedance 10¹² Ohm Power Supply BL981411-0: 12 VDC adapter (included); BL981411-1: 115/230 VAC; 50/60Hz Dimensions 83 x 53 x 99 mm (3.3 x 2.1 x 3.9’’) Weight BL981411-0: 200 g (7.1 oz.); BL981411-1: 300 g (10.6 oz.) Ordering Information BL981411-0 (12 VDC) and BL981411-1 (115/230 VAC) are supplied with mounting brackets, transparent cover and instruction manual. Recommended Probe HI1001 PVDF body pH electrode with 1/2” NPT thread, BNC connector and 3 m (9.8’) cable for continuous flowthru monitoring (not included). BL981411 pH Mini Controller • Large Clear LCD • Fire Retardant Casing • BNC Connection • Splash-Resistant Cover The BL981411 is a compact, pH process controller designed for applications where space and/or cost are important. The device contains a high impedance pH input and may be used with any pH 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 BL981411 features a dosing relay which may be configured to dose above or below a user programmable pH 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. Fuse Protected Dosing Contacts The relay dosing contact is rated for up to a 2A load and is fuse protected. Easy Peripheral Connection Quick-connect terminal blocks provide for easy connection to power, communication, dosing control, or sensors. Matching Pin Connection A built-in matchin pin helps protect the sensor from ground loop effects that may lead to erratic readings or system damage. See HI1001 pH probe on page 15.88; pH solutions begin on page 2.158; see rear connections on page 15.96 15 Process Instrumentation 15.84 | www.hannainst.com controllers
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