Dual Point Calibration With M400 / M800 Transmitter; Calibration When Connected With Analog Signal; Maintenance; Sensor Head Inspection - Mettler Toledo InSUS H60i Bedienungsanleitung

InSUS H60i
After the sensor signal has stabilized, the complete mea-
surement system can be calibrated to the desired variable,
e.g. % air, % O
the transmitter).
h Note: For this type of calibration an accurate reference
value and correct pressure settings are essential�
5�2�5 Dual Point Calibration with M400 / M800 Transmitter
To receive maximum accuracy of the measured values over
the full measuring range, a dual point calibration is required.
By carrying out a dual point calibration, both phase angles,
at zero oxygen (phi 0) and at hundred percent oxygen
(phi 100), of the single-use sensor can be established.
Point 1: Slope correction (with air or other calibration media
with known O
After the sensor signal has stabilized, the complete mea-
suring system can then be calibrated to the 100 % value
of the desired measurable variable, e.g. 100 % air, 20.95 %
O , or 8.26 ppm at 25 °C (77 °F) and normal pressure (see
2
instruction manual for the transmitter).
Point 2: Zero point
After the sensor signal has stabilized, the sensor can be
calibrated to the 0 % value of the desired measurable vari-
able, e.g. 0 % air, 0.0 % O
instruction manual for the transmitter).
h Note: Incorrect zero point calibration is a frequent source
of measurement error� For correct calibration, we rec-
ommend the use of nitrogen gas or other oxygen-free
medium with a level of purity of at least
5�2�6 Calibration When Connected with
As soon as a
communication, only rescaling of the
is available.
The procedures can be performed the same way as with
amperometric sensors:
1. Slope correction
2. Offset correction
6

Maintenance

h Note: All maintenance work can be done without any
tools�
6�1

Sensor Head Inspection

6�1�1 Visual Inspection
To check your sensor head, we recommend the following
procedure:
• The contacts of the connector must be dry. Moisture,
corrosion and dirt in the connector can lead to false
readings.
• Check the cable for buckling, brittle areas or ruptures.
• Before connection to a single-use O
amine both components optically for signs of damage.
The two parts must be clean and intact. Dirty surfaces
of sensor and sensor head should be wiped clean using
a soft, moist tissue.
a
Attention! Do not use any cleaning agents containing
alcohol or any solvents� This could damage the
© 09 / 2022 METTLER TOLEDO
Printed in Switzerland
, ppm or ppb (see instruction manual for
2
value)
2
2
sensor head
, or 0 ppm at 25 ˚C (77 ˚F) (see
Analog Signal
is connected with an analog
sensor head
sensor always ex-
2
13
99�995 %�
output
products�
InSUS H60i
30 802 188 A