Scanivalve MPS4232 - Calibration & Validation Overview; Full Calibration & Validation; Field Calibration & Validation Procedure; Setup and Configuration

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MPS4232
Section 6: Maintenance
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The MPS4200 uses stable, temperature compensated
piezoelectric pressures sensors. The use of these sensors in
the new design, along with the ability to perform frequent,
online zero-oset calibraons (CALZ), allow the MPS4200
to hold published accuracy for up to 6 months. Scanivalve
recommends performing a validaons on MPS4200s using
a high-accuracy pressure standard on a 6 month interval,
and calibrang when required. Reports generated by the
validaon process are stored in the MPS’s memory.
Every MPS4200 module is calibrated from the factory over
a series of 15 temperatures between 0° and 70°C. At each
temperature, 25 pressures are applied. This calibraon
creates a matrix of discrete temperatures and pressures,
called the master calibraon coecients. The MPS4200
converts these points into a polynomial, least-squares t.
Aer calibraon coecients are created, a mul-tempera-
ture validaon is performed over 3 temperatures from 10°
to 60°C, applying 15 dierent pressures at each tempera-
ture.
Automated calibraons and validaons require a Scanivalve
SPC4000 or SPC4050 calibrator. Manual calibraons and
validaons can be performed using a non-Scanivalve cali-
brator. Performing a manual calibraon requires user input,
and manual applicaon of pressures instructed by MPS.
All Calibraon and Validaon processes are handled
internally, requiring no addional soware on the host
computer. The MPS4200 allows for single or mul-unit cali-
braon and validaons. Mutli-unit calibraon or validaons
are controlled using a single MPS4200 device. Once this is
congured properly, a calibraon, validaon, or calibraon-
validaon can be performed on mulple units, using a
single module as the master controller.
There are two calibraon/validaon types that can be
performed in the MPS: Full Calibraon and Validaon, and
Field Calibraon and Validaon.

A full calibraon deletes all stored calibraon coecients
and applies known pressures over a series of temperatures
(as described in the previous secon), followed by a mul-
temperature validaon. This duplicates what is performed
at the factory during the module’s original manufacture
and calibraon. Full calibraon and validaon requires an
Ethernet controllable environmental chamber capable of
reaching the enre 0°C and 70°C range, and a suitable,
high-accuracy pressure standard. It is recommended that
for full calibraons, the module be returned to Scanivalve
or a cered Scanivalve Representave.
An automated full calibraon/validaon roune typically
takes 20 hours or more.


During a eld calibraon or validaon, a series of pressures
are applied to the module at a single temperature. The
temperature of the module does not have to be controlled
to a specic temperature, and does not require an envi-
ronmental chamber. The MPS4200 calculates a second set
of “eld” coecients at the current temperature of the
MPS, which is then used as a correcon term across the
full coecient table (0°-70°C). This technique is suitable for
maintaining module’s coecients long-term in the eld.
An automated eld calibraon/validaon roune typically
takes less than an hour.



The following secon is a guide for performing eld calibra-
ons and/or validaons on one or more MPS4200 modules.
If there are any quesons or concerns, please contact
Scanivalve TechSupport.

1. Connect power and Ethernet connecons to each
MPS module that will be calibrated or validated.
Modules should be allowed one or more hours of
warm-up me before a calibraon or validaon is
performed.
2. Connect to each MPS module using ScanTel or similar,
and set the following conguraons:
SET MCAST <unique mulcast address><ENTER>
SET IPCAL <IP address of the calibrator> <port of cali-
brator> <calibrator channel><ENTER>
SET VALZO 1<ENTER>
SET FCAL <number of calibraon points> <min cal pres-
sure> <max cal pressure><ENTER>
SET FVAL <number of validaon points> <min val pres-
sure> <max val pressure><ENTER>
• Recommended sengs can be found in later in this
secon, under Table 6-1.
• If a manual calibrator is to be used, ignore the IPCAL
variable.
• Each device that will be calibrated or validated must
be congured the same, unless there are dierent