ACD CAL-101 Manual de instruções - Página 7

Procurar online ou descarregar pdf Manual de instruções para Gerador portátil ACD CAL-101. ACD CAL-101 15 páginas. Calibration gas generator

After the desired equilibrium has been achieved, the instrument may be

used to perform gas calibration. The GREEN LEDs will continue to flash

ever 4 seconds indicating remaining cell life. While in normal operating

mode, the CAL-101 will run continuously and generate gas until either the

battery becomes discharged or the cell is consumed. (In the bump station

configuration the unit will run for thirty seconds then automatically turn off)

If the cell is consumed the green LEDs will 'ramp' max to min repeatedly

indicating the need for cell replacement. When this occurs, please refer to

the Non-Normal Operation section that follows.

Note: Changes in air pressure or temperature will affect the output of

the CAL-101 instrument. Before beginning any calibration please refer

to section VI. CORRECTIONS TO VOLUMETRIC FLOW- for important

adjustments needed to obtain accurate calibration gas.

The calibration gas is delivered through the calibration hose attached to the

CAL-101 via a quick connect coupling. A calibration adapter, or cup, which

is provided by the manufacturer of your gas detector, is usually attached

to the end of the delivery hose. This adapter or cup is then placed over

the gas sensor. Be sure not to restrict or block the delivery hose while the

pump is running. This method is used for calibrating diffusion type sensors.

Alternatively, the output gas may be collected into a gas collection bag

for calibrating sample draw instruments. If this method is used, it is

recommended that the instrument is allowed to flow into and out of the bag

via a "Y" connector. First, partially fill the bag with generated gas. Second,

attach the sample draw unit to the third side of the "Y" connector. The

sample draw instrument will draw from both the generator and/or the bag

depending upon the flow rate of the generator. Be sure to disconnect the

sample draw unit before the bag is completely emptied of gas.

An alternative method is to connect the "Y" adapter directly to the instrument

with no bag attached. This should only be used if the flow rate of the CAL-

101 is greater than that of the sample draw instrument, otherwise dilution

gas will also be drawn into the instrument reducing the calibration gas

concentration.

NOTE: Never attach a sample draw instrument directly to the end of

the CAL-101 delivery hose without a "Y" connector in between the two

instruments. This may cause damage to one or both of the air pumps

in the CAL-101 and/or sample draw instrument.

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