H69.0.21.6C-03
Operating Manual GCO 100
page 10 of 12
9.3 Adjustment with reference gas
The instrument can be adjusted to a reference gas by means of a test gas cap and the suitable
test gas bottle with gas valve. Depending on the application two concentration are offered as
standard:
"GZ-02"
12l disposable test gas bottle cont. 12l of 30ppm CO
"GZ-03"
12l disposable test gas bottle cont. 12l of 300ppm CO
Ca. 10 calibrations can be done per bottle.
Additionally needed:
"GZ-04" Gas Valve unit MiniFlo
"GZ-10" test gas cap for GCO100
Preparation of device:
Perform automatic zero point adjusting first (pr.t. chapter 9.2).
The Instrument as well as the gas bottle should have adjusted to room temperature.
Set the instruments display to the unit [ppm], if another one is displayed (p.r.t. chapter 4)
Preparation of the test gas and accessories
Screw the closed gas valve unit "GZ-04 MiniFlo" on the gas bottle
Screw the test gas cap "GZ-10" to the instrument
Connect the test gas cap "GZ-10" to the valve unit via the hose
The Gas bottle has to stand upright, for the flow-display
of the gas valve unit is able to work properly
Scale Adjustment
Keep bottle upright, open valve slowly,
until the ball in the flow indicator shows 0.5 l/min.
(lowest marking of indicator).
Wait until the measurement display at
has stabilised (ca. 1min), and write down the
displayed value. Close the valve accurately an
disconnect the bottle from the instrument.
Correction of scale value
If the displayed value differs from the nominal test gas concentration, the scale has to be adjusted.
For this read the “old” scale value ("Scal") from the adjustment menu (p.r.t. chapter 5.1)
Calculate the new scale like follows:
Scal_new = Scal_old * display at gas concentration / gas concentration
Enter Scal_new to the adjustment menu "Scal", and close the menu.
The instrument is now adjusted.
Attention:
The referring calibration protocol is then no more valid!
The ex works settings can be recalled with the "Init-YES" function of the configuration
menu (p.r.t chapter 7).
0.5 l/min
