Danfoss GDA EC 100 Installation Manual

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 fig. 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 fig. 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).
4 DKRCI.PI.S00.B2.02 / 520H2572 © Danfoss A/S (MWA), 2015-02
Installation Guide
Making Bump test on Danfoss gas detecting sensors,
types GDA and GDC
1
EC/SC/CT-Adaptor Ampoule Breaker
Sensor PCB
2
Gas flows through
the back and
front of the
sensor head
Bump test on a wall mounted CO detector
2
3
© Danfoss A/S (MWA), 2015-02 DKRCI.PI.S00.B2.02 / 520H2572
4
BUMP TEST equipment
Beaker
Ampoules
EC/SC/CT-
Adaptor
M35
Adaptor
5
1