Voltage Output Signal; Gas Connections - Teledyne 402R-EU Instruction Manual

Total hydrocarbon analyzer

Hide thumbs Also See for 402R-EU:

Instruction manual (2 pages)

Table Of Contents

Table of Contents

Total Hydrocarbon Analyzer

lockwasher are put on the screw, the screw must be screwed into the 402R-

EU case firmly to assure that the lockwasher next to the case cuts throught

the paint on the case to the metal of the case. The other end of this wire

must be connected to an approved safety ground (protective ground).

After connecting this wire to the 402R-EU and before connecting this

wire to the safety ground, check that the resistance from this wire to the

case of the 402R-EU is less than 1.0 ohms. If the resistance is greater than

or equal to 1.0 ohm:

The ground pin on the IEC power connector and the protective earth

ground screw are both protective conductor terminals and functional earth

terminals. Both must be grounded for personel safety and for proper

functioning of the equipment. A lack of grounding will result in erratic

instrument performance.

3.1.2

The output signal is available at the terminal block on the rear of the

analyzer case (see the "Input-Output Diagram"). A 2-conductor shielded

cable must be used to interconnect the analyzer with an auxiliary indicating

and/or recording instrument. Connect the shield at the analyzer end only.

Connecting both ends of the shield can produce a ground loop and erratic

performance. Polarize the signal connections as shown on the "Input-

Output Diagram".

Auxiliary indicating and/or recording equipment must have an input

impedance of no less than 10K . A self-balancing potentiometer is ideally

suited as an auxiliary indicator.

An isolated 4-20mA current output is also privided.

3.2

The analyzer gas connection diagram identifies the various gas con-

nection points as to function and location. Figure 3-1 shows the gas con-

nection points for instruments with or without the optional gas selector

1. Remove the screw, lug and star washers,

2. Scrape away the paint on the case in that area,

3. Reconnect the screw, lug and star washers,

4. And recheck the resistance.