Bacharach Monoxor II Service Manual download pdf (Page 12)

Single Gas Instrument Service Manual

Page 12 Bacharach, Inc. Instruction 0019-9166

3.0 SENSOR CALIBRATION

3.1 Monoxor II CO Calibration

Figure 3-1.

Calibration Kit

Setup

The following calibrates the MONOXOR II to a known concentration of carbon

monoxide.

Equipment Needed (Refer to Section “5.0 Replacement Parts” for Part

Nos.):

• Calibration Kit

• Carbon Monoxide Gas Cylinder, 500 ppm

• Potentiometer adjustment tool

Procedure:

WARNING!

Perform this procedure in a well ventilated area. CO is toxic!

1. Assemble the calibration equipment by connecting the Carbon Monoxide Gas

Cylinder and the components of the Calibration Kit together as shown in Fig

3-1.

NOTE: DO NOT attach the calibration setup to the instrument at this

time.

2. Zero the instrument as follows:

a. Ensure instrument will be sampling CO-free (fresh) air in the following

steps.

NOTE: An indication that the instrument was not zeroed in fresh air

is when a large negative CO display appears when the instrument is

moved into another area.

b. Set front panel POWER switch to ON.

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Bacharach Monoxor II Service Manual Page 12