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1.2 Drawing of initial assembly
with parts list
2 (a)
1
2 (b)
1 Stainless steel holder DIN1.4305
2 Screws (a, b)
3 Plastic insert black polypropylene
4 Plastic insert, light-colored polypropylene
«CaliCap» – Calibration Tool for
InPro
2.
«CaliCap» is a precision calibration tool for METTLER TOLEDO
scattered light sensors of the InPro
combination with the METTLER TOLEDO Turbidity Transmitter
Trb 8300. This tool is also suitable for use with the previous
product series of FSC402 transmitters and OFS12 sensors.
«CaliCap» serves to carry out a reproducible 2-point check of
4
METTLER TOLEDO turbidity sensors without the use of liquid
calibration solutions but is also suitable for calibrations with refe-
rence solutions in open laboratory vessels (beakers). The fault
tolerance for a dry check comes within the limits of ± 5% of the
measuring value.
2.1 Dry check
1.) Loosen the screws 2a and 2b but do not remove them
2.) Fully withdraw both plastic inserts [3] and [4] and put the
3.) From the other side, push the sensor into the stainless steel
This constellation is intended to simulate a high turbidity value,
whereby light is reflected by the surface of the light-colored insert.
4.) Vary the signal amplification (slope value) through the
3
5.) Release screw 2b and replace the light-colored insert [4] by
This constellation is intended to simulate the zero point. Vary the
offset value manually until a measuring value of «0» is shown on
the display. Note the new offset value of the transmitter.
6.) Remove the sensor from the «CaliCap» and reassemble the
The new values noted for signal amplification and for offset can
later be used during dry checks when carrying out routine checks
of the complete measuring system consisting of transmitter, sen-
sor, fixed cable and possibly extension cable.
a new optical fiber, an extension or even of a different «CaliCap»
unit make it necessary to carry out a new calibration of the com-
plete system.
2.2 Off-line calibration in open laboratory vessels
compatibility of all wetted parts, or otherwise to abstain altogether
from operation in aggressive media.
For off-line calibration, the stainless steel holder [1] together with
only the black insert [3] is needed when dipping the sensor into
the reference solutions. Due to the optimized design of the black
plastic insert, any disturbing light reflections from the sides or
bottom of the laboratory vessel are eliminated, thereby speeding
up the calibration procedure.
The solutions/media should be stirred during calibration to prevent
any sedimentation of solid particles.
Carry out steps 1, 2, 3 and 5 as described in Section 2.1. Steps
2 and 3 guarantee a reproducible constellation of sensor and
«CaliCap». Afterwards, the sensor with the «CaliCap» in place is
to be dipped into all calibration solutions consecutively and cali-
bration carried out as described in the Instruction Manual of the
Transmitter (see Chapter «Manual Calibration» or «Multipoint
Calibration»). Between the individual dippings into the different
solutions, the sensor including the fitted «CaliCap» holder is to
be rinsed each time with clear water or solvent.
When calibration has been completed, rinse the «CaliCap» and
the sensor thoroughly with clear water and then dismount the
sensor from the «CaliCap» unit completely. Rinse, clean and dry
the individual parts [1], 2a, 2b, 2c and [3] before reassembling
the «CaliCap» into its initial condition.
3. Conditions of warranty
METTLER TOLEDO guarantees the quality of materials and work-
manship within a narrow range of manufacturing tolerances, so
that the product purchased is free from any substantial deviations
from material and manufacturing quality standards. The warranty
is valid for the period of one year from date of delivery ex works.
If within this warranty period, any repair or replacement should
become necessary, and such cause is not due to misuse or incor-
rect application, please return the sensor, carriage paid, to your
appropriate METTLER TOLEDO agency. Repair work will be carried
out free of charge. Final decision on whether the defect is due to
a manufacturing error or to incorrect operation of the sensor by
the customer is made at the option of the Customer Service depart-
ment of METTLER TOLEDO. After expiry of the period of warranty,
faulty sensors will be repaired or replaced on an exchange basis
against payment of the costs involved.
®
8000 Turbidity Sensors
Use
completely.
light-colored insert [4] into where the black one [3] has been
beforehand. Retighten screw 2b.
holder [1] until it comes to rest against the light-colored
plastic insert [4]. Fix the sensor with screw 2a.
manual calibration function of the transmitter until a mea-
suring value of 100% appears on the display (see chapter
«Manual Calibration» in the Instruction Manual for the trans-
mitter.) Note the new value for the signal amplification.
the black one [3]. Retighten screw 2b. Leave the sensor in
the same position.
tool as it was in its originally supplied condition.
Any changes within the measuring system itself, such as
replacement of the transmitter, sensor or cable, the use of
Prior to use of the «CaliCap» and InPro
liquid samples, a check is to be made to ensure material
®
8000 Series operating in
®
8000 sensors in
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