Installation guide

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Installation Guide

Making Bump test on Danfoss gas detecting sensors,

types GDA and GDC

148R9544

4 DKRCI.PI.S00.B2.02 / 520H2572 © Danfoss A/S (MWA), 2015-02 © Danfoss A/S (MWA), 2015-02 DKRCI.PI.S00.B2.02 / 520H2572 1

Beaker

EC/SC/CT-

Adaptor

Ampoules

M35

Adaptor

BUMP TEST equipment

EC/SC/CT-Adaptor Ampoule Breaker

Sensor PCB

Gas ows through

the back and

front of the

sensor head

Bump test on a wall mounted CO

detector

ENGLISH

Appendix 1

Checking the zero. (0.0 V output)

EC sensor

To adjust the zero, Pot VR201 must be operated. It is located on the

Sensor PCB

Connect a voltmeter to TP0 on the mother PCB and Con3, pin 3 on

the mother PCB

Pot VR201 (on the Sensor PCB) is used to adjust the zero of the

range (span). Measure the Voltage output between TP0 (negative)

and Con3 pin 3 (positive) at the 0V signal and adjust the Pot to 0.0

V or slightly positive (0.01 V is acceptable).

SC sensor

To adjust the zero, Pot RV2 must be operated. It is located on the

Sensor PCB.

Connect a voltmeter to TP0 on the mother PCB and Con3, pin 3 on

the mother PCB (see g. A1)

Pot RV2 (on the Sensor PCB) is used to adjust the zero of the range

(span). Measure the Voltage output between TP0 (negative) and

Con3 pin 3 (positive) at the 0V signal and adjust the Pot to 0.0 V or

slightly positive (0.01 V is acceptable).

CT sensor

To adjust the zero, Pot R3 must be operated. It is located on the

Sensor PCB.

Connect a voltmeter to TP0 on the mother PCB and Con3, pin 3 on

the mother PCB (see g. A1).

Pot R3 (on the Sensor PCB) is used to adjust the zero of the range

(span). Measure the Voltage output between TP0 (negative) and

Con3 pin 3 (positive) at the 0V signal and adjust the Pot to 0.0

V or slightly positive (0.01 V is acceptable).

Summary of content (2 pages)

PAGE 1
Installation Guide ENGLISH Appendix 1 148R9544 148R9544 Making Bump test on Danfoss gas detecting sensors, types GDA and GDC Checking the zero. (0.0 V output) 1 EC sensor To adjust the zero, Pot VR201 must be operated. It is located on the Sensor PCB Connect a voltmeter to TP0 on the mother PCB and Con3, pin 3 on the mother PCB Pot VR201 (on the Sensor PCB) is used to adjust the zero of the range (span).
PAGE 2
Table 1 - Bump Test Pass test criteria Models Sensor 1 Requirement for sensor response to pass Bump Test. Measure Voltage Output on Con3,(mother PCB) pin 1 and 3 GDA EC 100 >= 5 .0 V GDA EC 300 >= 1.67 V Standard Basic Standard Basic with LCD display IP 65 for High RH and Fast response IP 56 enclosure Beaker + EC/SC/CT-Adaptor Beaker Beaker + EC/SC/CT-Adaptor >= 5 V Beaker + EC/SC/CT-Adaptor Beaker Beaker + EC/SC/CT-Adaptor >= 5 .