Span Calibration (Mgc 100) - Bacharach MGC 100 Operation & Maintenance Manual

3.9 Span Calibration
A span calibration of the MGC 100 consists of fl owing a recommended
certifi ed calibration gas of 99.5% N
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 O sensor per Section 3.7.
2
2. Connect a customer supplied certifi ed calibration cylinder of 99.5%
N O gas to a Bacharach regulator and hose as shown in Figure 3.
2
*
HOSE
REGULATOR
*
Regulator and Hose are part
of Calibration Kit. See Section
4.1, Accessories.
Figure 3. Applying Gas using Bacharach's Calibration Kit
Instruction 0019-9322
MGC 100/200
(MGC 100)
O (customer supplied) through the
2
Push hose over
the analyzer's inlet
connector
2
*
3
Adjust regulator knob for an outlet
pressure of 2 psi (corresponding to a
flow rate of between 100 and 200 cc/min.)
not
Ensure that pump is running.
Pump light must be OFF.
N O
2
Calibration Cylinder
17 Liter
13