d) Press End to accept the calibration and return to sample measurement.
The calibration result is shown on the display.
e) Press Exit to reject the calibration.
Note
Zero-point calibrations are frequently a source of error. Due to the very low zero current of METTLER
TOLE DO sensors, a zero-point calibration is unnecessary even for measurement at low oxygen con cen-
tra tions.
4.9 Data transfer
It is possible to transfer either all data or a userdefined set of data from the memory to a METTLER TOLE
DO printer (for example, RS-P26) or to a PC using this meter. The data is transferred with the IR inter face
on the left side of the meter.
Install the driver software (the latest drivers can be downloaded from www.mt.com/pHLab).
The following section describes how to proceed with the different configurations.
Data transfer from SevenGo Duo pro™ to an RS-P26 printer is done using an IR-RS232 adapter.
a) Connect the RS232 plug to the corresponding interface on the backside of the printer.
b) Point the instrument's IR window toward the IR receiver on the other end of the adapter cable.
c) Start transfer in the data menu.
Adjust the settings for data transfer as follows:
●
Baud rate: 1200
●
Data bits: 8
●
Parity: none
●
Stop bits: 1
Data transfer from SevenGo Duo pro™ to a PC can be accomplished three different ways:
●
Directly with an IrDA interface on the PC
●
Transfer with IR-RS232 adapter
●
Transfer with IR-USB adapter
a) Open LabX direct pH, Hyperterminal or BalanceLink.
b) Adjust the settings for data transfer as follows:
Baud rate: 9600
Data bits: 8
Parity: none
Stop bits: 1
Handshake: none
c) Connect the *adapter to the PC and point the IR window of the meter to the IR receiver.
d) Select the item in the data menu to start the transfer.
* If the computer has a built-in IR window, no adapter is needed.
4.10 Sample measurements
Place the sensor in the sample and press READ to start a measurement.
The display shows the readings of the sample in either the single channel or dual channel
mode.
Note: to switch between the single and dual channel measurement screen, press and hold
MODE for 3 seconds.
The endpoint format blinks, indicating a measurement is in progress.
pH/ORP/Ion/DO meter SG68
Operating the pH/ORP/Ion/DO meter SG68
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