De Nora Capital Controls CHLORALERT 17CA3000 Series, Instruction Manual

Page: 46 / 84

325.6610.17 - 46 -
•
SET TIME
•
SET DATE
•
CHANGE PASSWORD
•
DEFAULT DATABASE
•
SET LCD CONTRAST
•
SENSOR CHECK
•
RUN SELF-TEST
•
ENTER CONFIGURATION CODE
•
CUSTOM AVERAGE HOURS
4.4.2.1.1 Name
Allows an entry of a unique identifying “name” to distinguish a unit from
other units, mainly for purposes of remote serial communication.
INSTRUMENT
NAME
Any alpha-numeric entry is allowed up to 10 characters long. Refer to
section 4.3.3.1 for the procedure for entering numerical as well as letter
characters.
4.4.2.1.2 Engineering Units
Selects how the sensed gas concentration is to be shown on the LCD
display. The available selections represent English or Metric units.
INSTRUMENT
ENGINEERING UNITS
Available selections are:
•
ppm
•
mg/m
3
Selection of the desired units determines only how the gas readings are
shown on the display and does not affect any other parameter or output.
Only the gas concentration in the selected units is shown on the display,
the units themselves are not indicated. If mg/cu. m is selected, the
concentration is calculated at 25°C. The rest of the instrument continues
to operate as a “ppm” device and no automatic conversions are performed.
The operator must perform the appropriate conversions for alarm and
calibration levels as well as appropriate sensor type selection manually if
mg/cu. m mode is selected. Equivalent ranges in the mg/cu. m mode will
no longer be “neat” numbers like 0-10 ppm, but will be modified by the
appropriate English to metric conversion factor.
English (ppm) to metric (mg/cu. m) conversion factors for sensed gases
are as follows:
For example: Cl2 concentration in mg/cu.m = 2.9 x Cl
2
concentration in
ppm
GAS FACTOR
Cl
2
x 2.90
NH
3
x 0.70
SO
2
x 2.62
O
3
x 1.96