Transmitter Security; Zero And Span Adjustments - Omega PX2088 User Manual

Transmitter Security

(Security Jumpers are Available with Smart Transmitters Only)
After commissioning the transmitter, you may wish to protect the configuration data
from unwarranted changes. The transmitter is equipped with a security jumper that
can be positioned to prevent changes to the configuration data. (see Figure 4-10).
Remember that the circuit board is electrostatically sensitive. Be sure to observe
handling precautions for static-sensitive components to avoid damage to the circuit
board.
When the transmitter security jumper is in the "ON" position, the transmitter will
not accept any "writes" to its memory. This means that configuration changes (such
as digital trim and reranging) cannot take place when the transmitter security is on.
The zero and span adjustment buttons are also disabled. To reposition the jumper,
use the following procedure.
1. If the transmitter is installed, secure the loop, and remove power.
2. Remove the housing cover opposite the field terminal side. Do not remove the
instrument cover in explosive atmospheres when the circuit is alive.
3. Reposition the jumper. Avoid contact with the leads and the terminals. Refer
to Figure 4-10 for the location of the jumper and the ON and OFF positions.
4. Reattach the transmitter cover. The cover must be fully engaged to comply
with explosion-proof requirements.
FIGURE 4-10. Transmitter Alarm and Security Jumper Locations.
Alarm and Security Jumpers Without Meter
NOTE
If either the alarm or security jumper is dislodged or removed from its position the
transmitter reverts to default alarm or security settings of:
Alarm: output high
Security: off

ZERO AND SPAN ADJUSTMENTS

Smart
The Model PX2088 Smart is equipped with local zero and span adjustment buttons. The
buttons are located on the top of the transmitter beneath the certifications label. Use
the zero and span adjustments to set the 4 and 20 mA output points.
Alarm
Security
4-12
Alarm and Security Jumpers With Meter
Alarm
Security