Liquid Controls HML4-F1 - LCMag - Manual (Page 25)

HML4-F1
25
MENU 1.SENSOR
(POS. 1.1) Nominal diameter of sensor [ND= XXXX]
FUNCTIONS DESCRIPTION
(description of the functions with access code< 3)
The following pages give a description of the most important functions and how they can be changed or
enabled/disabled by the user.
MENU 1 - SENSOR
(POS. 1.6) Electrodes cleaning [E. cleaning=MIN]
Selectable options: OFF, minimum, average and maximum. It is not recommended the use of this
function (let OFF) when the liquid has a conductivity less than 100µS/cm.
(POS. 1.7) Empty pipe threshold
[E.p. thr.=XXX]
This value represents the threshold of measure block to zero in empty pipe condition; the span
function is 20-250. Since the sensibility of empty pipe detection could be changed by the liquid
conductivity, ground connections, type of lining, in case of needed it is possible to adjust manually
the preset threshold. It is recommended to check periodically its proper functioning. Value
increasing means sensibility decreasing.
(POS. 1.8) Autozero calibration
[Autozero cal.]
This function activates the zero calibration automatic system. To perform this operation, it is
necessary for the sensor to be full of liquid, and the liquid be perfectly still. Even minimal
movement of the liquid may affect the result, and consequently, the accuracy of the system. Once
you are sure the above conditions have been fulfilled (and the percentage flow rate value is stable)
press the key and automatically activates the zeroing procedure, after which it is necessary to
check that the percentage value showed goes to zero, repeat the operation otherwise. When the
value is stable at zero, then press the key Enter.
MENU 2 - SCALES
(POS. 2.1-2) Full scale n° 1-2 [FS1-2= dm³/S X.XXXX]
The full scale is used to indicate to the maximum meter’s flow rate; a volume per time is required.
The full scale should be chosen carefully as it’s parameters are used for several other parameters.
There are four fields to fill in order to set this parameter, from left to right: 1) volume unit of
measure, 2) type of unit, 3) time unit of measure and 4) numeric value. The selection is made by
positioning the cursor on the field to modify. To change the type of unit of measure (metric, British
or American, mass or volume) the cursor has to be positioned on the symbol “/” (field N. 2). When
the nominal diameter is set to zero it is possible to modify only the numeric field, since the unit of
measure stays at m/sec. The following tables show the units of measure available and the
conversion factor by comparison with 1 dm
3 and 1 kg. The converter accepts any kind of
combination of units of measure satisfying both the following conditions:
1. Numeric field value 99999
2.
1 /
25
fs
max
numeric field value fs
max
.
Menu visualized on the converter (from 1 to 11)
Synthetic description of the function
Identification of the function (not visualized on display)
Converter request