Danfoss GDA SC 10000, GDA EC 300, GDA SC 1000, GDA EC 1000, GDC IR 10000 Installation Manual

Installation Guide

Making Bump test on Danfoss gas detecting sensors,
types GDA and GDC

148 R95 44

148 R95 44

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/CT­Adaptor

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 CO2 detector

1

2

3

4

5

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).

© Danfoss A/S (MWA), 2015-02 DKRCI.PI.S00.B2.02 / 520H2572 32 DKRCI.PI.S00.B2.02 / 520H2572 © Danfoss A/S (MWA), 2015-02

Table 1 - Bump Test

Pass test criteria

Models

Sensor

Requirement for sensor response to pass Bump
Test. Measure Voltage Output on Con3,(mother

PCB)

pin 1 and 3

Standard Basic Standard Basic with

LCD display

IP 65 for High RH and

Fast response

IP 56 enclosure IP 56 enclosure

Low Temperature

EExd model EExd model

Low Temperature

IP 66 enclosure 5 m remote

IP 65 sensor

IP 66 enclosure 5 m remote

IP 65 EExd sensor

1

GDA EC 100 >= 5 .0 V

Beaker + EC/SC/CT-Adaptor Beaker Beaker + EC/SC/CT-Adaptor Beaker

GDA EC 300 >= 1.67 V

Bump test method 100 ppm Ammonia Ampoule

2

GDA EC 1000 >= 5 V Beaker + EC/SC/CT-Adaptor Beaker Beaker + EC/SC/CT-Adaptor Beaker

Bump test method 1000 ppm Ammonia Ampoule

3

GDA SC 1000 >= 5 .0 V Beaker + EC/SC/CT-Adaptor Beaker Beaker + EC/SC/CT-Adaptor Beaker + M35 Adaptor Beaker Beaker + M35 Adaptor

Bump test method 1000 ppm Ammonia Ampoule

4

GDA SC 10000 >= 0.5 V Beaker + EC/SC/CT-Adaptor Beaker Beaker + EC/SC/CT-Adaptor Beaker + M35 Adaptor Beaker Beaker + M35 Adaptor

Bump test method 1000 ppm Ammonia Ampoule

5

GDA CT 30000 >= 5 .0 V Beaker + EC/SC/CT-Adaptor Beaker + M35 Adaptor Beaker + EC/SC/CT-Adaptor Beaker + M35 Adaptor

Bump test method App. 5-8 % Ammonia water in a cloth

1

)

6

GDC IR 10000 >= 1.0 V Beaker Beaker not available Beaker Beaker Beaker Beaker not available not available

Bump test method 2000 ppm CO

2

Ampoule

1

) Drop a cloth to the bottom of the beaker, hold it at the bottom with the screw. Moisten the cloth (5-10 drops) with 5-8 % ammonia water.

Restricted bump test

Models

Sensor

Requirement for sensor response to pass Bump
Test. Measure Voltage Output on Con3,(mother

PCB)

pin 1 and 3

Standard Basic Standard Basic with

LCD display

IP 65 for High RH and

Fast response

IP 56 enclosure IP 56 enclosure

Low Temperature

EExd model EExd model

Low Temperature

IP 66 enclosure 5 m remote

IP 65 sensor

IP 66 enclosure 5 m remote

IP 65 EExd sensor

7

GDC IR 20000 >= 2 .0 V

Sensor is self calibrating. Breathe on sensor to see responseGDC IR 40000 >= 2 .0 V

Bump test method

8

GDHC SC 1000 >= 5 V

Long life sensor. Use a cigarette lighter to see response

GDHF SC 1000 >= 5 V

GDHF-R3 SC 1000 >= 5 V

Bump test method

9

GDH SC 5000 >= 5 .0 V

Long life sensor. Use a cigarette lighter to see response

Bump test method

ENGLISH

Introduction

The frequency of testing or calibration is
generally determined by local regulation or
standards.
There are two concepts that need to be
dierentiated: bump test and calibration

Bump Test: This consists of exposing
the sensor to a gas. The objective is to
establish if the sensor is reacting to the
gas and all the sensor outputs are working
correctly. A qualied bump test is a test
carried out using ampoules or cylinders of
known concentration.

Calibration: This consists of exposing the
sensor to a calibration gas setting the “zero”
or “Standby voltage”, the span or range,
and checking/adjusting all the outputs, so
that they are activated at a specied gas
concentration.

Danfoss recommends annual
checks by qualied bump test
and replacement of the sensor
PCB with a Danfoss pre-calibrated
certied sensor PCB every two
years. The mother PCB is at the
same time tested with the GD
tester.

The alternative to this is a full
on site calibration. Sensor
replacement should be more cost
eective, eliminates end of life
concerns, and constantly renews
the detection system.

Procedures for bump test and calibration
vary depending on the sensor technology
used and the gas in question.

The GD is available in four sensor versions:
Semiconductor (SC), Electrochemical (EC),
Catalytic (CT), and Infrared (IR) for CO

2

.

Before you carry out the test or
calibration:

1. Advise occupants, plant
operators, and supervisors.

2. Check if the relays (Con6 and
Con7) are connected
to external systems such as
sprinkler systems, plant
shut down, external sirens and
beacons, ventilation, etc. and
disconnect as appropriate.

3. Deactivate alarm delays with
JP1 and JP2. See g. 1.
For this the GD must be
powered o.

4. For Bump Test the GD should
be powered up overnight.

NOTE:
If unit has been installed and running
for about 24 hrs, and you need to power
it o to set the delay at 0 min, then the
warm-up is 2 min and you can begin the
testing or calibration.

ENGLISH

Bump test (every year)

Ideally bump tests are conducted on site in
a clean air atmosphere.

The bump test can be carried out on
following types of GD
(see table 1)
GDA (qualied bump test)
GDC (qualied bump test/ restricted
bump test)
GDHC (restricted bump test)
GDHF (restricted bump test)
GDHF-R3 (restricted bump test)

See table 1, to nd the GD type and the
corresponding Bump test method.

Checking the zero (0 Voltage output).
See Appendix 1. (not required for IR sensor)

1. Remove the cover of enclosure of the
GD

2. Make sure that both the ampoules and
the calibration beaker are clean and dry
(see g. 5).

3. Unscrew the beaker hold screw and
place the ampoule so that is sits in the
base of the beaker (see g. 2).

4. Tighten on the screw ampoule without
breaking it.

5. For the models:
Standard Basic
Standard Basic with LCD display
IP 56 enclosure
IP 56 enclosure Low Temperature
Screw in:
EC/SC/CT-Adaptor or M35-Adaptor into
the Beaker according to table 1.

Place the beaker with the EC/SC/CT­ Adaptor over the sensor.
It should be as tight tting as possible
to allow maximum exposure to the gas
(see g. 5).

For the GDC (CO2)models:
Standard Basic
Standard Basic with LCD display
IP 56 enclosure
IP 56 enclosure Low Temperature

Place the beaker over the sensor in a
45° degree (see g. 3). This allows gas to
ow through the back of the sensor
and through the calibration ports.

For the models:
IP 65 for High RH and Fast response
EExd model
EExd model Low Temperature
IP 66 enclosure 5 m remote IP 65 sensor
IP 66 enclosure 5 m remote IP 65 EExd
sensor

Screw/t the beaker (possibly with
M35 Adaptor) on the remote
sensorhead (see g. 4). It should be as
tight tting as possible to allow
maximum exposure to the gas.

6. Connect volt meter to monitor sensor
response.
(Con3 pin 1 and 3 - see g. 1).

7. Tighten on the ampoule until it
shatters allowing the content to diuse
in the beaker. It should be left in place
for approximately 5 min.

8. Voltage output will increase. This
conrms that the sensor is responding.
See Pass test criteria in table 1.

9. Carefully remove any ampoule remains
from the gas detector, and reassemble
the sensor enclosure.

Fill out the GD Bump Test Certicate.