Instruction Manual

PT2E-1052

11―1. Specifications

Model : GD-K71D

Transmission method : Electric current transmission method, 3-wire(or 4-wire),

4∼20mADC

Gas concentration signal : 4∼20mA(Linear upto 22mA)

Initial clear signal : 2.5mA

Maintenance signal : 2.5mA

Trouble signal : 0.5mA, non-isolated (max. load : 300Ω at 24VDC)

Applicable sensor : Electrochemical sensor

Detection gas : Toxic gases(Semiconductor processing gases)

Detection range : Depends on detection gas

Gas detection method : Sample drawing method(with low flow alarm detection circuit)

Sample flow rate : 500cc/min

External tubing : φ6-φ4 PTFE tubing (Provided with P.P. coupling)

Gas alarm : 2 levels(Non-lutched mode)

Preset level : 1st ……1/3 of full scale (adjustable)

2nd……2/3 of full scale (adjustable)

Indication : 1st ……Yellow LED lighting

: 2nd……Red LED lighting

Relay output : Dry contact, normally-open for both 1st and 2nd alarm,

rated 0.25A at 125VAC/0.5A at 24VDC(Resistive load).

Alarm delay time : Within 60sec(Time to get an alarm when exposed to gas

concentration of 1.6times alarm level, excluding delay by

external tubing).

Initial clear time : 25 sec. after power ON.

Zero suppression level : 6% of full scale

Self-diagnostic function

Contents : Low flow, system error, sensor disconnection, abnormal

zero correction.

Trouble indication : Flashing of POWER light, message of content.

Relay output : Dry contact, normally-open, rated 0.25A at 125VAC/0.5A at

24VDC(Resistive load).

Display function

Gas concentration : 4 digit LED(7 segment)

Status : LED light

①Power/trouble indication: PW/TR(continuous/flashing)

・Normal……Green/continuous

・Trouble……Green/flashing

②Gas alarm 1st: ALM1 light on (Orange)

2nd: ALM2 light on (Red)

Normal……Light off

Alarm ……Orange, Red light on

③Maintenance: SKIP light flashing

④Function interruption : SKIP light on

・OFF during measurement, ON at SKIP.

1１ LIST OF PRODUCT SPECIFICATIONS