Baker Hughes Panametrics XDP, User Manual

Page: 32 / 64

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4.5 Setting up the alarms
Use the instructions in this section to configure the system fault alarm and the four XDP alarms.
4.5.1 Setting up the system fault alarm
The system fault alarm is tripped whenever the 4-20 mA
analog input signal from the transmitter is outside the range
that was programmed in the previous section or the zero
drift/cal, zero drift/total, span drift/cal, or span drift/total
exceeds the programmed limit. The system fault alarm has
two possible operating modes:
•
Non-fail-safe: The alarm is wired to the normally-open
(NO) and common (C) contacts, and the alarm relay is
de-energized until a fault condition energizes the alarm
relay to close these contacts and trip the alarm.
• Fail-safe: The alarm is wired to the normally-closed
(NC) and common (C) contacts, and the alarm relay is
energized until a fault condition de-energizes the alarm
relay to allow these contacts to close and trip the alarm.
To specify the system fault alarm type, navigate to the
opt>user>fault alarm menu and proceed as follows:
1. At the fault alarm menu option press [ENTER].
2. Use the [

] and [

] keys to highlight either the
non-fail-safe option or the fail-safe option.
3. Press [ENTER].
4.5.2 Setting up the four XDP alarms
The XDP has four general-purpose, programmable alarms
that are linked to the ppm/pcnt value. These alarms are
designated as:
• Low low alarm
• Low alarm
• High alarm
• High high alarm
The following parameters may be programmed for
each alarm:
•
Trip point - the “low” and “low low” alarms will be tripped
if the current ppm/pcnt value is below this setpoint; the
“high” and “high high” alarms will be tripped if the current
ppm/pcnt value is above this setpoint. When an alarm
trips, the corresponding symbol (LL, L, H, or HH) is shown in
the lower right corner of the display.
• Deadband - this specifies the amount by which the
measurement must change before a tripped alarm
will be reset. This is to prevent the relay from constantly
tripping and resetting in response to minor measurement
fluctuations right near the trip point.
• Alarm type - the alarm may be set for either non-fail-safe
or fail-safe operation (see the previous section).
To program the four XDP alarms, navigate to the
cal>1:cal>setup>alarms menu and proceed as follows:
1. At the alarms menu option press [ENTER].
2. Use the [

] and [

] keys to highlight the menu
option for the desired alarm and press [ENTER].
3. Program the three alarm parameters as follows:
a. Use the [

] and [

] keys to highlight the
trip point menu option and press [ENTER].
b. Using the four arrow keys, program the mA/pcnt
value for the desired alarm trip point. Press [ENTER].
c. Use the [

] and [

] keys to highlight the deadband
menu option and press [ENTER].
d. Using the four arrow keys, program the mA/pcnt
value for the desired alarm deadband. Press [ENTER].
e. Use the [

] and [

] keys to highlight the fail-safe
menu option and press [ENTER].
f. Use the [

] and [

] keys to highlight the desired
alarm type menu option and press [ENTER].
4. To test the alarm that was just programmed, use
the [

] and [

] keys to highlight the test menu option
and press [ENTER].
a. Use the [

] and [

] keys to highlight either the
trip or reset menu option and press [ENTER].
The alarm relay should respond accordingly.
b. When done, press [ESC].
5. Repeat steps 2-4 until all of the alarms have been
programmed.