Teledyne HPS-10 Operating Information, Section, Normal Start-up, Analog Output, Gas Flow

SECTION 3

Operating Information

Normal Start-up

1)Connect the interface cable from the HPS-10 to the flowmeter. (See figure on page 2-4 of this manual)

2)Verify that the AC power to be applied to the HPS-10 is correct (115VAC).

3)Apply AC power to the HPS-10.

4)The HFM instrument has a local zero adjustment. Follow the zero adjustment procedure described in the HFM-200 or HFM-300 series manual.

Caution

Before applying power to the instrument, ensure that the line voltage being applied is correct. Failure to do so may result in damage to the instrument not covered by the warranty.

Analog Output

The HPS-10 generates an analog signal which is directly proportional to the displayed pressure. The analog output signal is given by:

VOUT	5 *	DISPLAY GAS FLOW
		FLOWMETER RANGE

The output signal is a DC voltage with a full scale reading for a given flowmeter corresponding to +5VDC. For example, if one has a 100 sccm flowmeter with a displayed flow of 35 sccm, then the output voltage will be:

V	5	*	35 sccm	1.75 Volts
OUT			100 sccm

Conversely, if the analog output voltage is measured, then the gas flow reading is given by:

VOUT (V)*FLOWMETER RANGE

GAS FLOW

5

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