Hanna Instruments BL120 User Manual

26
SETUP
Parameter Range / Options Default settings Description
Controller Password  Enable
 Disable
Disabled
Protects against unauthorized use
Controller ID 0 to 9999 / 1 1234 Identifies the controller
Hold Input*  Enable
 Disable
Disabled Enables or disables HOLD input for the recirculation
pump
Events Timeout 0 to 60 min / 1 min 0 min. This timer delays inactivating the pumps “control
function” for this time period after an Alarm condition
is triggered. (The pumps stay on during this time).
*Feature has to be enabled in Setup and an optional in-line flow sensor has to be attached to the controller HOLD input (see
digital input connections in WIRING section).
When the recirculation pump doesn’t work, the flow sensor output should be open to trigger the HOLD mode (inactivates the
dosing pumps).
7.3. PARAMETERS SETUP OVERVIEW
8.0 pH
900 mV
200 mV
°C
Disabled
105.0°C
-5.0°C
5 min
Disabled
6.0 pH
Disabled
30 min
Note: The analog outputs – AO1, AO2, AO3 – are only available for BL121 & BL123.
pH
Parameter Range / Options Default settings Description
Dosing Type Acid / Base Acid
Switch between options, depending on the tank
content
Set Point 6.00 to 8.00 pH / 0.01pH 7.2 pH
Used to set required pH level
When the acid pump is activated, the pump LED flashes
Proportional Band 0.1 to 2.0 pH / 0.1 pH 2.0 pH
pH regulated time proportional band. Proportions
on/off time within the band.
The pump is ON continuously at the set point value
with added band
pH Flow Rate 0.5 to 3.5 l/h / 0.1 l/h 2.2 L/h pH dosing pump flow rate
Overtime 1 to 120 min / 1min 30 min Maximum allowed dosing time in automatic mode
Alarm High
(pH Low+0.1) to 14.0 pH
Acid / 0.1 pH
8.0 pH
Minimum pH value that triggers the alarm high if
continuous for more than 5 seconds*
Status and service LEDs are active and acid pump
is disabled

Hanna Instruments BL120 Specifications

General

Brand	Hanna Instruments
Model	BL120
Category	Controller
Language	English