Owner's manual
Table Of Contents
- 1 Overview
- 2 Safety
- 3 Commissioning
- 4 Operation
- 4.1 Switching on the meter
- 4.2 Login with a user name
- 4.3 General operating principles
- 4.4 Sensor-independent settings
- 4.5 Sensor info
- 4.6 Channel display
- 4.7 pH value
- 4.7.1 General information
- 4.7.2 Measuring the pH value
- 4.7.3 Settings for pH measurements
- 4.7.4 pH calibration
- 4.7.5 Calibration interval
- 4.7.6 Carrying out an automatic calibration (AutoCal)
- 4.7.7 Carrying out a manual calibration (ConCal)
- 4.7.8 Displaying calibration records
- 4.7.9 Continuous measurement control (CMC function)
- 4.7.10 QSC function (sensor quality control)
- 4.8 ORP voltage
- 4.9 Dissolved oxygen
- 4.10 Conductivity
- 4.11 Data storage
- 4.12 Transmitting data (USB interfaces)
- 4.12.1 Outputting current measurement data
- 4.12.2 Transmitting data (to a PC)
- 4.12.3 Connecting the PC / USB-B interface (USB Device)
- 4.12.4 Options for data transmission to a PC (USB-B interface)
- 4.12.5 Connecting the USB memory device / USB-A interface (USB Host)
- 4.12.6 Data transmission to a USB memory device (USB-A interface)
- 4.13 Reset
- 5 Maintenance, cleaning, disposal
- 6 What to do if...
- 7 Technical data
- 8 Lists
- 9 Appendix: Firmware update
Multi 3420 Operation
75
ba75864e11 02/2011
Calibration evaluation of
the FDO
®
925
Calibration in
water vapor-
saturated air
Proceed as follows to calibrate the D.O. sensor:
Note
The sponge in the check and storage vessel must be moist (not wet).
Leave the sensor in the check and storage vessel long enough so it can
adapt to the ambient temperature.
Display Calibration record Relative slope
+++ S = 0.94 ... 1.06
++ S = 0.92 ... 0.94 or
S = 1.06 ... 1.08
+ S = 0.90 ... 0.92 or
S = 1.08 ... 1.10
Error Error
S < 0.90 or
S > 1.10
Eliminate the error according to
chapter 6 W
HAT TO DO IF...
1 Connect the D.O. sensor to the meter.
2 Place the FDO
®
925 D.O. sensor into the check and storage
vessel, FDO
®
Check.
3 Start the calibration with <CAL>.
The last calibration data (relative slope) is displayed.