Gas Units; Table 3-4. Default Analog Outputs In Auto Range Mode - Thermo Scientific 48i Instruction Manual

Gas Units

Thermo Fisher Scientific
Table 3–4. Default Analog Outputs in Auto Range Mode
Channel Connector Pin
1 14
2 33
3 15
4 34
5 17
6 36
Ground 16, 18, 19, 35, 37
Note All channels are user definable. If any customization has been made
to the analog output configuration, the default selections my not apply.
The Gas Units screen defines how the CO concentration reading is
expressed. Gas units of parts per million (ppm) and milligrams per cubic
3
meter (mg/m ) are available. The mg/m
calculated using a standard pressure of 760 mmHg and a standard
temperature of 20 °C.
When switching from ppm to mg/m
highest range in that mode. For example, when switching from mg/m
ppm, all the ranges default to 10000 ppm. Therefore, whenever you change
units, you should also check the range settings.
In the Main Menu, choose Range > Gas Units.
●
Note If the units change from ppm to mg/m
should be re-calibrated, particularly if the user's standard temperature is
different from 20 °C. A display warning will appear that ranges will be
defaulted and calibration parameters reset.
GAS UNITS:
CURRENTLY:
SET TO:
AND SET RANGES AND CAL
DEFAULT SETTINGSXXXXXXXXXX

CHANGE VALUE
RANGE AVG
I/O Terminal Pin
1
3
5
7
9
11
2, 4, 6, 8, 10, 12
3
gas concentration mode is
3
, the analog ranges all default to the
3
or vice versa, the instrument
▲
ppm
mg/m3 ?
TOX
SAVE
DIAGS ALARM
Model 48i Instruction Manual
Operation
Range Menu
Description
CO Analog Output
Range Status:
half-scale = high range
zero scale = low range
None
None
None
None
Signal Ground
▲
3
to
3-13