
Transmitter M400 73
© 02 / 2010 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter M400
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In the next step the salinity of the measured solution can be modified.
In addition the relative humidity of the calibration gas can also be entered. The allowed values
for relative humidity are in the range 0% to 100%. When no humidity measurement is avail-
able, use 50% (default value).
Pressing the [ENTER] key again will bring up the Save Changes dialog. Selecting No will dis-
card the entered values and return to the measurement display screen, selecting Yes will save
changes made.
8.2.3.6 Adjusting sampling rate for optical sensors
If during the channel setup (see chapter 8.2.1 “Channel setup”) the parameter O2 Opt has been
chosen the parameter O2 opt sampling rate can be adjusted.
For doing this adjustment the menu “O2 opt sampling rate” has to be chosen. (see chapter
8.2.3 “Parameter related settings”
The time interval from one measuring cycle of the sensor to the other can be adjusted i.e. adapt-
ed to the application. A higher value will increase the life time of the OptoCap of the sensor.
Pressing the [ENTER] key will bring up the Save Changes dialog. Selecting No will discard the
entered values and return to the measurement display screen, selecting Yes will save changes
made.
8.2.3.7 LED Mode
If during the channel setup (see chapter 8.2.1 “Channel setup”) the parameter O2 Opt has been
chosen the parameters LED, T off, DI 1 LED control can be set resp. adjusted.
For doing these adjustments the menu “LED Mode” has to be chosen. (see chapter 8.2.3 “Pa-
rameter related settings”.
The operation mode for the LED of the sensor can be selected. There are the following options.
Off: LED is permanently switched off.
On: LED is permanently switched on.
Auto: The LED is switched on as long as the measured media temperature is smaller then
Toff (see next value) or switched off thru the digital input signal (see over next value).
h
NOTE: If the LED is switched off, no oxygen measurement is performed.
Press [ENTER]
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