Teledyne 1220 - Multipoint flammable gas and vapor detection system - Manual (Page 38)

4 Operation Model 1220
4-10 Teledyne Analytical Instruments
4.4.5 Using the “1MAN” Calibration Option
The two following calibration procedure can be performed by one
technician.
4.4.5.1 Zero and Span Calibrating a Single Sensor
Channel Module
1. At the Front Panel of the Channel Module to be calibrated:
a. Press SELECT.
b. Use the right or left arrow key to highlight the 1MAN option.
c. Press ENTER.
2. At the remote probe site, introduce certified span gas to the sensor.
3. Wait 60 seconds so that the reading can stabilize.
4. Remove the span gas and introduce zero gas to the sensor.
5. Wait 60 seconds so that the reading can stabilize.
6. At the Front Panel of the Channel Module being calibrated:
a. Press the up or down arrow key until the display reads “0”.
b. Press ENTER.
c. Press the up or down arrow key until the display reads the value
that corresponds to the value of the certified span gas used.
NOTE: Information about calibration values for various combustible
gases appears in Table 1 on page 2-5 and in Section 4.11 on page
4-14
NOTE: If you need to adjust the Sensitivity Gauge, see Paragraph 4.8
for recommendations.
d. Press ENTER.
7. If necessary, proceed to the previous or next procedure. Otherwise,
press RUN to place the instrument in the analysis mode.
4.4.5.2 Zero and Span Calibrating a Dual Sensor Channel
Module
1. At the Front Panel of the Channel Module to be calibrated:
a. Press SELECT.
b. Use the up or down arrow key to highlight the appropriate
sensor to be calibrated (S1 = Sensor 1 or S2 = Sensor 2).
c. Press ENTER.
d. Use the right or left arrow key to highlight the 1MAN option.
e. Press ENTER.
f.
Perform the procedure listed in Paragraph 4.4.5.1 beginning
with Step “2” and then return here.