Detcon P-1000 - Manual (Page 14)

P-1000
Portable Model 1000 H2S Analyzer Rev. 1.0 Page 10 of 24
3.0 Analyzer Operating Software
Operating software is menu driven with operator interface via the use of two magnetic program switches
located under the front panel. The two switches are labeled “PGM 1” and “PGM 2”. The menu consists of 3
items which include sub-menus as indicated below. (Note: see section 3.5 for a complete software flow chart.)
01. Normal Operation
a) Current Status
02. Calibration Mode
a) Zero Cal
b) Span Cal
03. Program Mode
a) View Program Status
b) Set Span Level
c) Set Date
3.1 Normal Operation
In normal operation, the display tracks the current status of the sensor and gas concentration and appears as:
“0 PPM xxx” (where “xxx” is the abbreviated gas type, i.e., “0 PPM H2S”). The current output corresponds to
the monitoring level of 0-100% of range (I.E. a reading of 0ppm = 4mA and full scale = 20mA). If applicable,
the second line of the display will show current “Fault” conditions.
3.2 Calibration Mode
Calibration mode allows for sensor zero and span adjustments. “1-Zero Cal, 2-Span Cal”
3.2.1 Zero Adjustment
Zero is set in ambient air with no target gas present or with zero Air or N
2
gas applied to the sensor. (Refer to
Section 4.1 for details.)
3.2.2 Span Adjustment
Span adjustment is performed with a target gas concentration of 50% of range in air or nitrogen. Span gas
concentrations other than 50% of range may be used as long as they are between 10 to 90% of range. (Refer to
section 4.2 for details.)
3.3 Program Mode
The program mode provides a program status menu (View Program Status) to check all operational
parameters. It also allows for the adjustment of the auto span gas level setting and the current calendar date.
3.3.1 View Program Status
The view program status scrolls through a menu that displays the following (the slash means the data is on line
two of the display):
™
Sensor type. The menu item appears as: “Sensor Type / H2S”
™ Sensor range of detection. The menu item appears as: “Sensor Range / 0-XXX PPM”
™ ISM software version number. The menu item appears as: “ISM Code Ver. / X.XX Mth Year”
™ UTM software version number. The menu item appears as: “UTM Code Ver. / X.XX Mth Year”