Shellab BACTROX User Manual download pdf (Page 10)

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Bactrox Operations Manual 10

point temperature. Allow the incubator at least 24 hours to stabilize. Then re-calibrate the digital

display to your reference thermometer, follow the calibration instructions. This incubator was

calibrated at the factory at 37

7.2 Setting Incubator Safety: First, set the control to the desired incubator temperature and then the

INCUBATOR SAFETY to its maximum position. Allow 24 hours for stabilization before

proceeding.

7.3 If, after 24 hours the temperature is not at desired level, adjust the SET TEMPERATURE up or

down using the arrows until the precise desired temperature is achieved.

7.4 When stabilization at the desired temperature has been achieved, turn the SET OVER

TERMPERATURE control knob counter-clockwise until the OVER TEMP ACTIVATED light

comes on and audible alarm is activated. Next, carefully turn the SET OVER TERMPERATURE

knob clockwise until the light is just off. The safety is now set; the OVER TEMP ACTIVATED

light should remain OFF during normal operation.

7.5 NOTE: An accurate thermometer should be used inside the incubator as a reference when

setting and calibrating the incubator temperature.

7.6 It is a good idea to mark the SET OVER TERMPERATURE label with the desired setting or

position as a backup in case the knob is moved accidentally. If the OVER TEMP ACTIVATED

light is on and audio alarm is activated at any time, check the SET TEMPERATURE controller

setting to be sure that it is not set above the SET OVER TERMPERATURE setting.

7.7 Alarm Controls and Display: The temperature control, O

, and the CO

control are both

equipped with visual and audible alarms.

• Temperature Alarms: The temperature control has alarm indicators for high and low conditions

that are activated whenever the actual temperature is 1°C above or below the set point.

• O

Alarms: The O

controller has alarm indicators for high and low alarm conditions that are

activated whenever the actual O

% is 1% above or below the set point.

• CO

Alarms: The CO

controller has alarm indicators for high and low alarm conditions that are

activated whenever the actual CO

% is 1% above or below the set point.

• Audible Alarms: Both controls have audible alarms that are activated when either of the HIGH

or LOW indicators is activated.

7.8 Muting Audible Alarms: The audible alarms can be muted for a single alarm occurrence by

pressing and holding down EITHER the UP or DOWN button for several seconds until the alarm

mutes. There is a built in delay of approximately 15 minutes on the occurrence of a LOW alarm.

This time delay prevents the audible alarm from activating every time the door is opened and the

temperature and CO

drops.

8. CO

CONTROL CALIBRATION

8.1 Manufacturer’s Recommendation for Monitoring CO

Levels: CO

sensors are factory calibrated

and, under normal circumstances, need no calibration. It is recommended that the accuracy of

your CO

control system be monitored by measuring the actual CO

concentration on a weekly

basis with a Fyrite or other measuring device. This should be done when the chamber has not

been opened for an extended period of time, i.e. after the weekend, and should only take 1-2

hours.

8.2 Setting the CO

Control: Attach the supply hose from the CO

tank to the Bactrox CO

inlet fitting

and turn on the CO

supply. Set the CO

control to the desired set point using the up and down

arrows. The CO

level comes from the factory preset to OFF.

8.3 Adjusting CO

Display: After the Bactrox has had several hours to stabilize at the desired CO

set point and measure the actual CO

% with a Fyrite gas analyzer. If there is any difference

between the Fyrite gas analyzer and the display, use the procedure described in section 7 page

14 for calibrating CO

. See Section 9 Page 19 (next page) for Fyrite use and instruction.

NOTE: When using the Fyrite gas analyzer, insure that gas is not being injected while the reading is

being taken. Always change the CO

set point to 0.0 prior to taking the sample and change the set point

back to the desired value after the use of the Fyrite gas analyzer is finished.

8.4 Using a FYRITE to Measure CO

Levels

A Bacharach FYRITE CO

Gas Analyzer is recommended to measure CO

concentrations in the Bactrox chamber. This test instrument is not supplied with the

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