Requirements For Test Assemblies With The Cph7650; Important Instrument Settings For Calibration Using Calibration Mode - WIKA CPH7650 Betriebsanleitung

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4. Design and function

4.5.1 Requirements for test assemblies with the CPH7650

Before starting any task, the instrument should be switched on briefly to determine
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that there is sufficient charge in the battery (rechargeable battery capacity in %). The
battery capacity is indicated briefly in an instrument status message after switching
on (see chapter 6.2.1 "Instrument status messages shortly after switching on the
CPH7650").
Initially, the test assembly must be physically assembled and, if necessary, connected
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electrically (see chapter 4.5.4.1 "Connection of the model CPT6000 reference
pressure sensor").
Before switching the CPH7650 on, ensure that the test assembly is not pressurised
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(system is vented to atmosphere) and that the equipment is correctly assembled and
in the correct mounting position.
Only connect test and calibration installations once the system has been
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depressurised!
Compensation for height differences
If a significant elevation difference exists between the CPT6000 reference pressure
sensor and the test item, then the pressure difference, based on a medium column, can
be compensated automatically via the menu (see chapter 6.4.5 "SETUP additional menu
items: CPH configuration").

4.5.2 Important instrument settings for calibration using calibration mode

Calibration date
The instrument has an integral real-time clock with date. The current date of a calibration
is stated later in the calibration certificate. Before starting a calibration, you must ensure
that the internal date of the CPH7650 is correct (see
chapter 6.4.5 "SETUP additional menu items: CPH configuration").
Unit and resolution
After selecting one of the main menu items (e.g.: MEASURING, CALIBRATION or
SWITCH TEST) from the SETUP menu (press SETUP key), using the menu item "Unit",
and its associated submenu respectively (move the cursor to "Unit" and press the right
or left arrow), you can set the unit and adjust its resolution (see chapter 6.3 "Operating
modes").
WIKA operating instructions, model CPH7650
EN
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