Teledyne 9110TH - Nitrogen Oxides Analyzer - Manual (Page 168)

Model 9110TH NOx Analyzer Operating Instructions
Teledyne Analytical Instruments 148
4.14. SETUP – ALRM: USING THE OPTIONAL GAS
CONCENTRATION ALARMS (OPT 67)
The optional alarm relay outputs (Option 67) are installed includes two concentration
alarms. Each alarm has a user settable limit, and is associated with an opto-isolated TTL
relay accessible via the status output connector on the instrument’s back panel. If the
concentration measured by the instrument rises above that limit, the alarm‘s status
output relay is closed NO
2
.
The default settings for ALM1 and ALM2 are:
Table 4-28: Concentration Alarm Default Settings
ALARM STATUS LIMIT SET POINT
1 OUTPUT RELAY
DESIGNATION
ALM1 Disabled 100 ppm 133.9 mg/m 3 AL2
ALM2 Disabled 300 ppm 401.6 mg/m 3 AL3
1
Set points listed are for PPM. Should the reporting range units of measure be changed the analyzer will automatically
scale the set points to match the new range unit setting.
Note To prevent the concentration alarms from activating during span
calibration operations make sure to press CAL or CALS button prior to
introducing span gas into the analyzer.
To enable either of the concentration alarms and set the Limit points, press:
ENTR accepts the new
settings
EXIT ignores the new
settings
SETUP X. ALARM 1 LIMIT: 200 PPM
0 1 0 0 .0 0 ENTR EXIT
SETUP X.X ALARM MENU
ALM1 ALM2 EXIT
SETUP X. ALARM 1 LIMIT: OFF
OFF ENTR EXIT
SETUP X.X PRIMARY SETUP MENU
CFG DAS RNGE PASS CLK MORE EXIT
SETUP X.X SECONDARY SETUP MENU
COMM VARS DIAG ALRM EXIT
SAMPLE A1:NXCNC1=100PPM NOX=XXX.X
< TST TST > CAL SETUP
Toggle these buttons
to cycle through the
available character set:
0-9
SETUP X. ALARM 1 LIMIT: ON
ON ENTR EXIT