Calibration Maintenance; Promet Eexd Sampling System; Figure 1 Promet Eexd Sampling System - Michell Instruments Promet EExd User Manual

INTRODUCTION
1.8

Calibration Maintenance

Maintenance of calibration is essential to the lifetime performance of all analyzers. To
ensure that all customers worldwide can maintain the performance of their Promet EExd,
the unique Michell Calibration Exchange Service offers freshly calibrated replacement
Ceramic Sensors certified traceable to NPL and NIST. As the calibration characterization
data for each Promet EExd Sensor is programmed into on-board non-volatile memory,
fitment of the Calibration Exchange Sensor refreshes the calibration, returning the
measurement performance to day-one with down-time of only a few minutes while
the interchange is made. No programming or data input is required by the user to
complete this. The calibration exchange is available globally on swift delivery, typically
less than two weeks, and at the same or less then the cost of a traditional 'return to
manufacturer' re-calibration service.
The recommended calibration maintenance interval is 12 months for sweet gases and
6 months for sour gases.
Michell recognises that some customers wish to carry out their own calibration
adjustments in the field using either a portable dew-point generator (ATSM D5454),
or against a calibrated reference hygrometer or certified moisture-in-gas cylinders.
The Promet EExd accommodates all such needs within the operating firmware that
offers user-friendly access to the calibration characterization table for re-calibration
adjustments to be made at just one point (for example, using a certified cylinder gas)
or multiple points (using a field generator) across the measurement range.
1.9

Promet EExd Sampling System

(Optional – see separate manual if you have purchased this item)
Good sample conditioning and handling is particularly important in the field of moisture
measurement. As the moisture sensor has to be exposed directly to the process liquid
stream in order to detect the dissolved moisture present, key sampling issues such
as the avoidance of particulate contamination are imperative to successful operation.
Michell's 30 years of expertise in on-line process moisture analyzers are used to optimize
the design of the Promet EExd Sampling Systems.
Contact Michell Instruments for further details: www.michell.com.
4
Figure 1 Promet EExd Sampling System
Promet EExd User's Manual
97090 Issue 16.1, November 2019