Metek 920, Operator'S Manual With Essential Health And Safety Requirements

Page: 125 / 278

Controller / User Interface | 4-17
RUN / CFG Mode – F2 Commands
Keystroke Term Definition
F2 • MBAddr Modicon Modbus
®
slave address – can be any value between 0–255. ‘
0
’ disables the
Modbus
®
communication. Addresses 1–127 select the RS-232 port and addresses
128–255 select the RS-422 port.
F2 – ComPara
zn
The setup parameters for the Baud Rate, Stop Bits, and Parity of the serial communication
port, where ‘
z
’ = 1..3 and where ‘
n
’ = 0..3.
n = 0..3 Baud Rate Stop Bits Parity
z
= 1
z
= 2
z
= 3
0 9600 Invalid None
1 4800 1 Odd
2 2400 1.5 None
3 1200 2 Even
Note: Parameter changes must be saved to the EEPROM and the analyzer must be
reset for the changes to take effect.
To reset the analyzer, take all necessary safety precautions and then press
‘ • ’ and ‘ Ent ’ simultaneously.
F2 0 Cell ** Axial length of the Measuring Cell gas space (cm).
F2 1 Bench
n
** The Bench Type code, where ‘
n
’ = the current Bench Code value, defines which PMT is
designated as
Measure
and
Reference
, the number of temperature zones, and the filter
positions assigned to each source lamp.
Standard Bench Type Code
Code b6 (64) b5 (32) b4 (16) b3 (8) b2 (4) b1 (2) b0 (1)
4 0 0 0 0 1 0 0
The value in (brackets) beside each bit number is its decimal weighting.
The typical value displayed is ‘ 4 ’ ((‘ 4 ’ = 3 temperature zones: 1, 2, 4). For systems with the
manual Blow-Back function enabled, the displayed value is ‘ 2 ’ (‘ 2 ’ = 2 temperature zones:
1, 4).
The extra temperature zones are not available when the Isolation and Blowback
functions are turned on.
See also “Probe Blow-Back Control” in this chapter.
Note: The Standard Bench Type Code lists the default code for the analyzer.
Depending on the species being measured, the lamp types, and the application,
this code will change. For the Bench Type Code for your application, view the
Bench screen (press F2 1 in RUN mode).
Do not change the value without direction from AMETEK.
Bench Orientation (b0)
b0 Measure Reference
0 PMT1 PMT2
1 PMT2 PMT1