Ashcroft ATE-2, Operation And Maintenance Manual

Page: 38 / 84

36
28.241
Live(PSi)
Tri p (PSi)
R ese t (PSi) DB(PSi)
31.353
28.412 2.942
27.876
Live(PSi) Tri p (PSi)
---
--- ---
R ese t (PSi) DB(PSi)
SECTION 15 g. SWITCH TESTING FUNCTION
CONT.
Use DOWN or UP ARROW to highlight “Measurement Channel…”
Press ENTER
Use DOWN or UP ARROW to highlight “CH1” (Channel 1
module) or “CH2” (Channel 2 module)…
Press ENTER
HHC will go back to Switch Testing MENU
Use DOWN or UP ARROW to highlight “Signal Type…”
Press ENTER
Use DOWN or UP ARROW to highlight “Current or Voltage…”
Press ENTER
Use DOWN or UP ARROW to highlight “Switch Type…”
Press ENTER
Use DOWN or UP ARROW to highlight “Normally Open or Nor-
mally Closed…”
Press ENTER
Display will briefly display the message “Begin Test” then immedi-
ately enter switch test mode.
In Switch Test Mode the display will initially show the Live pres-
sure (pressure being applied at that time), and units of measure.
The switch trip point, reset point and dead band (DB) will be
blank indicated by “---“
Setup is now complete and switch testing can begin. Depending
on the options chosen above either apply additional pressure or
release pressure slowly.
Note: depending on number of modules installed the update rate
will be either 0.2 or 0.3 seconds. A rapid increase or decrease
in pressure near the switch setpoint can result in inaccurate
readings
When the switch opens or closes the pressure/temperature read-
ing and units of measure will be displayed as “trip” point.
Slowly release or increase pressure (opposite of the action taken
in the earlier step) until switch state changes again. This value
will be displayed as the “reset” value along with units of measure.
The deadband (DB) will also be calculated and displayed. This
value is the difference between the trip point and reset point.
If desired, record the readings displayed on the screen. These
values are not included in the manual Datalog.
To reset switch test and maintain the same parameters press the
ZERO key to return to initial testing screen.
To exit switch test mode press ESC
To enter Main MENU Programming Mode press MENU.