Detcon TP-524C Bedienungsanleitung PDF herunterladen (Seite 7)

Calibration mode allows for sensor span adjustments. Unless otherwise specified, span adjustment is performed at

10 ppm H2S in air for the range 0-20 ppm, and 25 ppm H2S in air for the ranges 0-50 ppm and 0-100 ppm.

“AUTO SPAN”

3.4.3 Program Mode

The program mode provides a program status menu (View Program Status) to check operational parameters. It also

allows for the adjustment of the calibration gas level setting, the heater voltage level, range, and linearity correction.

3.4.3.1 Program Status

The program status scrolls through a menu that displays:

* The gas type, range of detection and software version number. The menu item appears as: “H2S 0-100 V#.#”

* The calibration gas level setting. The menu item appears as: “CalLevel @ ##PPM”

* The sensor heater voltage setting. The menu item appears as: “HEATER @ #.##VDC”

* The range of detection setting. The menu item appears as: “RANGE @ 0-###PPM”

* The estimated remaining sensor life. The menu item appears as: “SENSOR LIFE 100%”

* The raw resistance of the sensor film. The menu item appears as “RESISTANCE = XX” (in ohms)

3.4.3.2 Set Cal Level Adjustment

The Calibration level is adjustable from 10% to 50% of full-scale range. The menu item appears as: “CalLevel @ ##PPM”

3.4.3.3 Set Heater Level Adjustment

The Heater Level is adjustable from 4.40 to 5.40 vdc (normally 5.25). The menu item appears as: “Heater @ #.## vdc”

3.4.3.4 Set Range

The full-scale range is adjustable between 0-20 ppm, 0-50 ppm and 0-100 ppm The item appears as: “Range @ 0-### ppm”

3.4.3.5 Utility Menu

“Set X Value” is an adjustment for linearization (factory setting only!)

“Set Filter Mode” is a selection of filtering modes (factory setting only!)

3.5 INSTALLATION

Optimum performance of ambient air/gas sensor devices is directly relative to proper location and installation practice.

3.5.1 Field Wiring Table

(4-20 mA output)

Detcon Model TP-524C solid state H2S sensor assemblies require three conductor connection between power sup-

plies and host electronic controllers. Wiring designators are

(DC),

–

(DC) , and

(sensor signal). Maximum

single conductor resistance between sensor and controller is 10 ohms. Maximum wire size for termination in the

sensor assembly terminal board is 14 gauge.

AWG Meters Feet

20 240 800

18 360 1200

16 600 2000

14 900 3000

Note 1:

This wiring table is based on stranded tinned copper wire and is designed to serve as a reference only.

Note 2: Shielded cable may be required in installations where cable trays or conduit runs include high voltage

lines or other sources of induced interference.

Note 3: The supply of power must be from an isolating source with over-current protection as follows:

AWG

Over-current Protection AWG Over-current Protection

22 3A 16 10A

20 5A 14 20A

18 7A 12 25A

Detcon Model TP-524C Hydrogen Sulfide Sensor

PG.7

1 2 3 4 5 6 7 8 9 10 11 12 ... 19 20

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