Hanna-instruments HI 2550 Manuale Utente Pagina 19
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19
RELATIVE RELATIVE
RELATIVE RELATIVE
RELATIVE
mm
mm
m
V CALIBRATIONV CALIBRATION
V CALIBRATIONV CALIBRATION
V CALIBRATION
• Press CAL when the instrument is in RELATIVE mV measurement
mode. The “mV” and “ ” tags will be displayed. Absolute mV is
displayed on the primary LCD and “AbS” message is displayed on the
secondary LCD.
• When the absolute reading is stable and in measurement range, the
instrument asks for confirmation.
• If the reading is out of range, “WRONG” tag will be displayed.
• Press CFM to confirm the absolute value. The instrument will display
0.0 mV on the primary LCD and “rEL” message on the secondary
LCD. In this moment the relative mV offset is equal to absolute mV
reading.
• Use the ARROW keys if you want to change the displayed relative
mV value.
• Press CFM to confirm the relative mV value. The instrument returns
to measurement mode.
Note: The relative mV value can be changed only inside the relative mV
offset window (± 2000 mV).
EC/TDS CALIBRATIONEC/TDS CALIBRATION
EC/TDS CALIBRATIONEC/TDS CALIBRATION
EC/TDS CALIBRATION
Selectable calibration points for conductivity are 0.00 μS for offset and
84.0 μS, 1413 μS, 5.00 mS, 12.88 mS, 80.0 mS, 111.8 mS for slope.
Rinse the probe with calibration solution or deionized
water. Submerse the probe into the solution. The sleeve
holes must be completely submersed. Tap the probe
repeatedly to remove any air bubbles that may be trapped
inside the sleeve.
To enter EC calibration, select the EC range and press
CAL.
The “BUF” and “CAL” tags are displayed. The primary
LCD will display the EC reading. The secondary LCD will display the value.
The “ ” and “~” tags will blink.
Note: The TDS reading is automatically derived from the EC reading and
no specific calibration for TDS is needed. Pressing CAL when TDS
range is selected has no effect.
For zero calibration, just leave the dry probe in the air. This calibration
is performed in order to correct the reading at 0.00 μS. The slope is
evaluated when the calibration is performed at any other point.
- Multiparameter 1
- EC/TDS/NaCl 1
- Bench Meter 1
- FUNCTIONAL DESCRIPTION 4
- SPECIFICATIONSSPECIFICATIONS 5
- SPECIFICATIONS 5
- OPERATIONAL GUIDE 7
- AUTO-RANGINGAUTO-RANGING 12
- AUTO-RANGING 12
- (1¼") 14
- NaCl CALIBRATION 22
- • The instrument ID 25
- • The reference temperature 26
- LOGGING FUNCTION 28
- For EC Range 33
- SETUPSETUP 36
- PC INTERFACEPC INTERFACE 45
- PC INTERFACE 45
- (7 chars) 48
- TROUBLESHOOTING GUIDE 54
- ACCESSORIESACCESSORIES 56
- ACCESSORIES 56
- ORP ELECTRODES 61
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