Ashcroft ATE-2 - Handheld Calibrator - Manual (Page 37)

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SECTION 15 f. vii Clear Internal Memory Storage
Cont.
Use DOWN or UP ARROW to highlight Yes or No
Press ENTER
Selecting “no” will return to the Datalog MENU
Selecting “yes” will proceed to “Clearing Logs…” screen.
When the operation is complete the HHC will return to
Measurement Mode.
The HHC can be used to test pressure and temperature switches.
Onboard firmware provides the ability to verify switch trip point,
reset point and to calculate deadband of a pressure switch.
The HHC looks for a change of state that produces either 2 volts
or a 2 mA change across the corresponding voltage or current
input terminals.
Prior to initiating this test procedure the required electrical set up
should be configured to provide the necessary signal levels per
the wiring diagrams presented in section 14j.
Note: Switch test requires slow changes in process pressure. See
damping to minimum setting.
Set up switch test
The operator must program the following parameters before
beginning switch testing:
• Measurement Channel (Channel 1, Channel 2)
• Input Signal type (Voltage or current)
• Switch type (Normally open or closed).
• See wiring diagrams in Section 14j
Press MENU key
Use DOWN or UP ARROW to highlight “Modes…”
Press ENTER
Use DOWN or UP ARROW to highlight “Switch testing…”
Press ENTER
Ꮨƽ
Delete all logs?
Are you sure you want to
clear all internal storage?
Yes
No
Clearing logs…
Clearing all internal
storage: this may take
a little while.
Modes
Dual module functions…
Percent error…
Switch testing…
Communications…
SECTION 15 g. SWITCH TESTING FUNCTION