45
Model 4688-IR / Model 4679-IR
Operation & Maintenance Manual
Manual #087-0007G, 10/2003
The USER Menu
Adjusts alarm setpoints, relay operation, and various sensor parameters such as gas
type, display engineering units.
Displayed
As:
Description
Min
Max
Default
Value
MEM
Region
MODBUS
Register
Address
Data
Type
[BITS]
Assigned
Parameter
#
0 %LEL
60 %LEL
(or equiv.
%V/V)
25 %LEL
CO
2
0.0 %v/v
5.0 %v/v
0.5%v/v
0 %LEL
60 %LEL
E14(or
equiv.
%V/V)
20 %LEL
CO
2
0.0 %v/v
5.0 %v/v
0.5%v/v
A1.Sd
Alarm 1 Set Delay
in seconds. Delays
activation of the alarm's display indicator
and the alarm's relay after the concentration
rises to (or above) the alarm's set point
value.
0s
5 s
0 s
PMEM
40265
Unsigned
Integer
[16]
13
A1.Rd
Alarm 1 Reset Delay
in seconds. Delays de
activation of the alarm's display indicator
and the alarm's relay after the concentration
to (or below) the alarm's reset point value.
0 s
600 s
0 s
PMEM
40268
Unsigned
Integer
[16]
14
A1.OP
Alarm 1 Options
- Specifies options for the
alarm 1 indicator and relay.
0 = Non-latching, non-failsafe
1 = Non-latching, failsafe
2 = Latching, non-failsafe
3 = Latching, failsafe
The failsafe option keeps the relay energized
in the non-alarm state and de-energizes it on
alarm (and power) failure. The latching
option requires that the alarm indicator be
manually reset and re-latched, once the
concentration has fallen to (or below) the
alarm's set point value.
0
3
0
PMEM
40272
[Low byte]
Unsigned
Byte
[8]
15
0 %LEL
60%LEL
(or equiv.
%V/V)
50%LEL
CO2
0.0 %v/v
5.0 %v/v
1.0 %v/v
0 %LEL
60% LEL
(or equiv.
%V/V)
45% LEL
CO2
0.0 %v/v
5.0 %v/v
1.0 %v/v
A2.Sd
Alarm 2 Set Delay
in seconds. See A1.Sd
for details.
0 s
0 s
0 s
PMEM
40266
Unsigned
Integer
[16]
18
A2.Rd
Alarm 2 Reset Delay
in seconds. See
A1.Rd for details.
0 s
600 s
0 s
PMEM
40269
Unsigned
Integer
[16]
19
A2.OP
Alarm 2 Options
- Specifies options for the
alarm 2 indicator and relay. See A1.OP for
details.
2
3
2
PMEM
40272
[hi byte]
Unsigned
Byte
[8]
20
REAL
[32]
12
17
Alarm 1 Reset Point
- At or below this
concentration the unit will turn off the AL1
display indicator and deactivate the alarm's
relay. Units are the same as the displayed
reading in RUN mode (%LEL or equivalent
%V/V).
Alarm 2 Set Point
(High/High* Alarm) - See
A1.SP for details.
PMEM
40259
PMEM
40261
A1.SP
Alarm 1 Set Point
(High* Alarm) At or
above this concentration the unit will turn on
the alarm's display indicator and activate the
associated alarm relay. Units are the same
as the displayed reading in RUN mode
(%LEL or equivalent %V/V). Value must be
equal or greater than the alarms reset point.
PMEM
40257
REAL
[32]
11
A1.RP
16
Alarm 2 Reset Point
- See A1.SP for
details.
IMPORTANT!
Alarm 2 should
always be configured as a latching alarm.
A2.SP
A2.RP
PMEM
40263
USER MENU - Alarm Relay Parameters
REAL
[32]
REAL
[32]
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