Instruction 0019-9322
MGC 100/200
HOSE
*
REGULATOR
*
N
2
O
Calibration Cylinder
17 Liter
2
3
Push hose over
the analyzer’s inlet
connector
Adjust regulator knob for an outlet
pressure of 2 psi (corresponding to a
flow rate of between 100 and 200 cc/min.)
Ensure that pump is
not
running.
Pump light must be OFF.
*
Regulator and Hose are part
of Calibration Kit. See Section
4.1,
Accessories.
Figure 3. Applying Gas using Bacharach’s Calibration Kit
3.9 Span
Calibration
(MGC 100)
A span calibration of the MGC 100 consists of
fl
owing a recommended
certi
fi
ed calibration gas of 99.5% N
2
O (customer supplied) through the
instrument and calibrating the instrument to the applied gas level.
WARNING!
If using a gas concentration other than 99.5%,
the instrument’s default span gas value
must
be changed to
match the applied gas using the optional BACH-COM soft-
ware; otherwise, inaccurate gas readings will result.
CAUTION:
Gas
fl
ow through the instrument must not exceed
100–200 cc/min. (corresponds to a pressure of approximately
2 psig), as internal damage to the instrument can occur.
A Bacharach supplied calibration kit (refer to Section 4.0) can be used to
fl
ow calibration gas through the instrument, assuming a standard 17 li-
ter gas cylinder is being used. If a different size cylinder is used, then a
fl
ow regulator that
fi
ts the cylinder must be supplied by the customer.
1. First zero the N
2
O sensor per Section 3.7.
2. Connect a customer supplied certi
fi
ed calibration cylinder of 99.5%
N
2
O gas to a Bacharach regulator and hose as shown in Figure 3.
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