Detcon 974-071170-BCR - Manual (Page 8)

Ballast Monitor I.M.
Ballast Monitor Instruction Manual Rev. 0.0 Page 4 of 8
4. Calibration
The Ballast Monitor and the attached sensor are calibrated prior to shipment and should require minimal
adjustment at the time of installation. However, it is recommended that a complete calibration is performed on
a periodic basis to assure optimum unit performance. Refer to the sensor’s instruction manual for gas type,
range, and sensor specific calibration instructions. Note that the sensor instruction manual requires the
removal of rain/splash guards for the application of gas. This requirement will be superseded by the
instructions below. The calibration adapter attached to the sensor head should not be removed during
calibration.
Fixed Flow
Regulator
6" of vent tube
CALIBRATION
Port
Teflon tubing
Span Gas
Cylinder
1000
ml/min
500 ml/min
SAMPLE
FLOW
BYPASS
FLOW
www.detcon.com
BALLAST GAS
DETECTION MONITOR
SAMPLE CALIBRATE
SAMPLE BYPASS
FLOW
1
4
" 'T' fitting
Figure 4 Calibration setup
Required material:
1. Span gas cylinder containing gas as per instructions in the sensor instruction manual.
2. 1/4" Tee tubing fitting as shown in Figure 4.
To Calibrate: (refer to Figure 4)
1) Turn the 3-way valve so that the arrow is pointing to the right. The sample is now being drawn from the
‘CALIBRATION’ port.
2) Using the 1/4" ‘T’ Calibration Setup, connect the span gas cylinder to the calibration port. Note that the
cylinder flow rate should be 1000 ml/m while the sample draw flow rate should be adjusted from 100- 500
ml/m. This will assure that the sample is not diluted. Be sure to add 6” of vent tubing as shown to prevent
dilution.
3) Follow the calibration instructions given in the sensor instruction manual.
4) Close cylinder valve to allow clearing/zero stability. Note that zero and span functions may interact
slightly with one another. Zero and span tests may be repeated 2 or 3 times as necessary.
5) When calibration is complete turn the 3-way valve so that the arrow is pointing toward “SAMPLE” it
ensure proper normal operation of the Ballast Monitor.