ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter Instruction Manual
49
Meter Operation
The meter is capable of accepting a variety of thermocouples and RTDs.
The dual-line display can be customized by the user to operate in such a way as to satisfy a specific
application. Typically, display line 1 is used for the process variable; while line 2 is used engineering units,
custom legend, or set point indication.
Additionally, the meter can be set up to display the thermocouple or RTD input on line 1 and the Modbus
input on line 2. The relays and analog output can be programmed to operate from the Modbus PV input.
Front Buttons Operation
Button Symbol
Description
or
Press to enter or exit Programming Mode, view
settings, or exit max/min readings
or
Press to reset max readings or other
parameter/function assigned through the
User
menu
or
Press to display max/min readings or other
parameter/function assigned through the
User
menu
or
Press to acknowledge relays or other
parameters/function assigned through the
User
menu
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 mechani-
cal 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
LOCK) 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.
WARNING
Take caution when cleaning the window
glass as it may result in unintentional Safe-
Touch button events. Only clean the ProtEX-
MAX when the system is safely shut down,
and inspect the ProtEX-MAX for proper con-
figuration prior to system restart.
