Mettler Toledo M400/2(X)H Dokumentacja Strona 60

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Transmitter M400/2(X)H, M400G/2XH 60
© 03 / 2014 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter M400/2(X)H, M400G/2XH
Printed in Switzerland 30 031 683
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.
8.6 ISM set up
(available for pH and oxygen ISM sensors)
(PATH: Menu / Configure / ISM Setup)
Enter Configuration mode as described in Section 8.1. “Enter Configuration Mode” and navigate
to the menu “ISM set up” by using the or . key. Press [ENTER]
8.6.1 Sensor monitoring
Select the menu “Sensor Monitoring” by pressing [ENTER].
The sensor monitoring options can be turned on or off and every alarm can be assigned to a
certain output OC. The following options are possible:
Lifetime indicator: The dynamic lifetime indication allows an estimation, when the pH electrode
or the inner body of an amperometric oxygen sensors is at the end of his lifetime, based on the
actual stress he is exposed to. The sensor permanently takes the averaged stress of the past
days into consideration and is able to increase / decrease the lifetime accordingly.
Lifetime Indicator YES / NO
Alarm YES / NO R# choose OC
The following parameters affect the lifetime indicator:
Dynamic parameters: Static parameters:
– Temperature – Calibration history
– pH or oxygen value – Zero and Slope
– Glass impedance (only pH) – CIP / SIP / Autoclaving cycles
– Reference impedance (only pH)
The sensor keeps the information stored in the built in electronics and can be retrieved via a
transmitter or the iSense asset management suite.
The alarm will be reset if the Lifetime Indicator is not 0 days anymore (e.g. after connecting a
new sensor or changing on the measurement conditions).
For amperometric oxygen sensors, the lifetime indicator is related to the inner-body of the sen-
sor. After exchanging the inner-body, reset the lifetime indicator as described in chapter 8.6.5
“Reset ISM counter/timer”.
If the Lifetime Indicator is turned on, in the measuring mode the value will be automatically
shown in the display on line 3.
Press [ENTER]
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