ProtEX-MAX PD8-6000 Explosion-Proof Process Meter
Instruction Manual
57
SafeTouch Buttons
The ProtEX-MAX is equipped with four sensors that
operate as through-glass buttons so that it can be
programmed and operated without removing the cover
(and exposing the electronics) in a hazardous area.
These buttons can be disabled for security by
selecting DISABLE on the switch labeled
NO-CONTACT BUTTONS located on the
connector board.
To actuate a button, press one finger to the glass
directly over the marked button area. Then retract
finger more than three inches from the glass before
pressing the next button. When the cover is removed,
the four mechanical buttons located next to the
sensors are used. The sensors are disabled when a
mechanical button is pressed and will automatically
be re-enabled after 60 seconds of inactivity.
The SafeTouch Buttons are designed to filter normal
levels of ambient interference and to protect against
false triggering, however, it is recommended that the
SafeTouch Buttons be disabled (slide switch to
DISABLE) if there is an infrared interference source in
line-of-sight to the display.
The SafeTouch Buttons are configured by default to
duplicate the function of the front panel mechanical
pushbuttons associated with the integrated meter.
The symbols by each SafeTouch button correspond
to a mechanical button as shown in the above table.
SafeTouch Button Tips:
•
To the extent possible, install the display facing
away from sunlight, windows, reflective objects
and any sources of infrared interference.
•
Keep the glass window clean.
•
Tighten the cover securely.
•
Use a password to prevent tampering.
Function Keys Operation
During operation, the programmable function keys
operate according to the way they have been
programmed in the
Advanced Features
– User
menu.
See
Programmable Function Keys User Menu
The table above shows the factory default settings for
F1, F2, and F3.
Digital Inputs Operation
Five (5) digital inputs, F4, DI-1 to DI-4, come standard
on the meter. These digital inputs are programmed
identically to function keys F1, F2, and F3. The inputs
are triggered with a contact closure to +5 in the case
of digital inputs 1-4 or with an active high signal, see
is triggered with a contact closure to COM or with an
active low signal. During operation, digital inputs
operate according to the way they are programmed in
the Advanced Features
– User menu. See
Programmable Function Keys User Menu
) on
Maximum/Minimum Readings
The max & min readings (peak & valley) reached by
the process can be displayed either continuously or
momentary:
1. Display briefly by assigning to the F1-F3 function
keys or to the digital inputs in the
User
menu.
2. Display continuously by assigning either display
to max/min through the
Display
menu.
Any of the F1-F3 function keys (buttons) and the
digital inputs can be programmed to reset the max &
min readings. The meters are set at the factory to
display the max reading by pressing the Up arrow/F2
button and to use the Right arrow/F1 button to access
the
Reset
menu.
To display max reading using function key with
factory defaults:
1. Press Up arrow/F2 button to display maximum
reading since the last reset/power-up.
2. To reset max/min press Right arrow/F1 button to
access the Reset menu. The max & min displays
are reset to actual values.
3. Press Menu to exit max/min display reading.
To display max/min readings continuously:
Assign either display to Max (
d Hi
), Min (
d Lo
), or
toggle between Max and Min (
d HL
) every 10
seconds.
Summary of Contents for ProtEX-MAX PD8-6000
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