Hach 3700 Série Manuel D'utilisation De Base page 16

Option
SELECT MEASURE
DISPLAY FORMAT
COND UNITS
TEMP UNITS
T-COMPENSATION
CONFIG TDS
CONFIG CONC
TEMP ELEMENT
CELL CONSTANT
FILTER
LOG SETUP
RESET DEFAULTS
(or DEFAULT
SETUP)
Solution Concentration
H PO 0–40%
3 4
HCl 0–18% or 22–36%
16 English
Description
Changes the measured parameter to conductivity (default), TDS (total dissolved
solids), salinity or % concentration. When the parameter is changed, all other
configured settings are reset to the default values.
sc100—When Concentration is selected, the CONFIG CONC option is added to the
menu. Refer to the CONFIG CONC description that follows.
8
Changes the number of decimal places that are shown on the measure screen to
auto (default), X.XXX, XX.XX, XXX.X or XXXX. When set to auto, the number of
decimal places changes automatically with changes in the measured value.
Changes the conductivity units—µS/cm (default), mS/cm, S/cm or auto
auto, the units change automatically with changes in the measured value. For
concentration measurements, changes the units for calibration and user conductivity-
concentration table—µS/cm, mS/cm (default) or S/cm.
Sets the temperature units to °C (default) or °F
Adds a temperature-dependent correction to the measured value—linear (default:
2.0%/°C, 25 °C), natural water, temp table (enter x,y points in ascending order) or
none. For special applications, a user-defined linear compensation can be entered
(0–4%/°C, 0–200 °C). Natural water is not available for TDS or concentration.
TDS only—changes the factor that is used to convert conductivity to TDS: NaCl
(default, 0.49 ppm/µS) or custom (enter factor between 0.01 and 99.99 ppm/µS).
Note: This menu option shows after SELECT MEASURE>TDS is selected.
Concentration (%) only—sets the type of concentration table to use: built-in (default)
or user table (user defined). When built-in is selected, the user can select the
chemical that is measured. If user table is selected, the user can enter up to 10 x,y
(conductivity, %) points in ascending order. Refer to
sc100—This menu option shows after SELECT MEASURE>CONCENTRATION is
selected.
Sets the temperature element for automatic temperature compensation to PT100 or
PT1000 (default). After selection, the user should enter the certified T-factor from the
label on the sensor cable for best accuracy. If no element is used, the type can be
set to manual and a value for temperature compensation can be entered (manual
default: 25 °C).
Note: If a sensor with a PT100 or PT1000 element is set to manual and the sensor is
replaced or the sensor days are reset, the TEMP ELEMENT automatically changes
to the default setting.
Changes the cell constant to the actual certified K value from the label on the sensor
cable. When the certified K value is entered, the calibration curve is defined.
Sets a time constant to increase signal stability. The time constant calculates the
average value during a specified time—0 (no effect, default) to 60 seconds (average
of signal value for 60 seconds). The filter increases the time for the sensor signal to
respond to actual changes in the process.
Sets the time interval for data storage in the data log—5, 30 seconds, 1, 2, 5, 10,
15 (default), 30, 60 minutes.
Sets the configuration menu to the default settings. All sensor information is lost.
Table 4 Built-in concentration tables
Solution Concentration
NaCl 0–26%
HF 0–30%
8
. When set to
Table 4.