Full Text Searchable PDF User Manual
GfG GESELLSCHAFT FÜR GERÄTEBAU MBH
TELEFON +49 / (0)2 31 / 5 64 00 –0
FAX +49 / (0)2 31 / 51 63 13
AMTSGERICHT DORTMUND HR B 2742
ZERTIFIZIERT NACH DIN EN ISO 9001:2000
ATEX QM ZERTIFIZIERT
Smart motorized pump for Microtector II series
For your safety
Application and use
Special conditions for safe use
General description and design
Connection to Microtector II series
Sensor cover and inlet
Turning pump on and off
Pump confidence signal
LowFlow - alarm
Minimum pump time
Pump monitoring and failure
Monitoring battery capacity
Information about pump
Charging the battery pack
Replacement of batteries and battery pack
Maintenance and regular function check
Changing of filter
Spare parts and accessories
EC-Type Examination Certificate
1.1 For your safety
According to § 3 of the law about technical working media, this manual points out the proper use of the
product and serves to prevent dangers.
This manual must be carefully read by all individuals who have or will have the responsibility for using and
servicing this product. As any piece of complex equipment, the product will do the job designed to do, only,
if it is used and serviced in accordance with the manufacturer's instructions.
If the product is not used and serviced in accordance with the instructions in this manual the warranty will
be voided. Adjustments in the service mode must be done by experts only.
Before operating the pump check the charge status of the battery resp. of the rechargeable
battery as well as the readiness of operation of the detector (see chapter “Indication of battery
capacity”, page 5).
The above does not alter statements regarding GfG's warranties and conditions of sale and delivery.
1.2 Application and use
The smart motorized pump G400-MP2 is used for personal safety in atmospheric conditions in combination
with the portable gas detectors of the Microtetcor II series.
The smart pump G400-MP2 is approved for the use in explosion endangered areas and is subject to an EC-
Type Examination Certificate issued by DEKRA EXAM, according to directive 2014/34/EU with following
For the application in group I, category 2G depends on the temperature class of the supply module used.
When using the rechargeable battery pack „NiMH II“, temperature class T4 is valid for ambient temperatures
from –20°C to +55°C, resp. temperature class T3 when using the rechargeable battery pack “NiMH”. Both
rechargeable battery packs come with a black casing and can be distinguished by means of an internal label
showing type and temperature class. When using the Alkaline batteries (grey housing), temperature class T4
is valid for ambient temperatures from -20°C to +45°C resp. temperature class T3 for ambient temperatures
of -20°C to +55°C. For the application in group I, category M1 the pump G400-MP2 can be used in
1.3 Special conditions for safe use
In explosion endangered areas the pump G400-MP2 must be used properly, i.e. the pump with a gas
detector of the G400 series must be carried at your body and must not be laid down unattended, to prevent
an electrostatic charge of the clip. The pump must be attached to the Microtector II gas detector before
entering the explosion endangered are. It must not be removed from the detector in the hazardous area.
Always pay attention to the ignition protection with the temperature class of the gas detector.
If the pump G400-MP2 is going to be used in underground or surface mines which are endangered by black
damp and/or combustible dust (device category I) following additional conditions apply: A mechanical
impact must be avoided because the G400-MP2 is only specified for a lower degree of mechanical hazard
according to EN 60079-0. The pump G400-MP2 has to be removed from hazardous areas immediately and
getting cleaned if it becomes soiled by oil and grease or hydraulic liquids.
BVS 07 ATEX E 011
Ex ia IIC T4 Gb
Ex ia IIC T3 Gb
Ex ia IIC T4/T3 Gb -20°C≤Ta≤+45°/+55°C (Alkaline)
Ex ia I Ma
1.4 General description and design
The pump G400-MP2 is a very small and handy supplemental module for the gas detector
Microtector II series. It allows sampling of gases from a safe position, without being exposed to hazardous
atmospheres. The pump provides its own power supply, which works independent from that of the
Microtector II series.
Type label with date of manufacture
10=year / 03=month
1.4.1 Connection to Microtector II series
Plug the pump G400-MP2 on the gas detector Microtector II series and fix it by means of the knurled screws.
For permanent attachment to the Microtector II series you can fix the pump by means of 2 additional screws
(attached). You will find the mounting holes for the additional screw below the red sensor cover. For
accessing the holes, slide the sensor cover upwards – push the lock smoothly with a screw driver – and
remove it. Once the screws were mounted, fix the sensor cover again and slide it downwards.
For removing the pump from the Microtector II series, unscrew the knurled screws as well as the possibly
mounted additional screws.
1.4.2 Sensor cover and inlet
For both turning device on
diffusion inlet slide sensors
The sampling inlet is at the
bottom of the pump body.
accessories for taking gas
samples (hose adapter with
sampling line, probe, GfG
Connection of accessories
for gas sampling
The sensor cover turns pump on and off and closes the diffusion inlets during sampling.
2. Operational Hints
2.1 Turning pump on and off
Slide the blue sensor cover upwards to turn the pump on. The display of the Microtector II shows the actual
operational status of the pump.
With sufficient battery capacity the pump motor starts after a short delay
(approx. 1 second). The display of the Microtector II shows the battery
If the blue sensor cover is slided upwards violently, it may slip over its lock and the diffusion inlets
are not properly covered. This may result in false detection, since ambient air could dilute the concentration
of the gas sample. Make sure, therefore, that the diffusion inlets are closed properly.
Slide the blue sensor cover downwards to turn the pump off.
The pump symbol vanishes and the remaining battery capacity of the pump is
shown in the display of the Microtector II.
The pump should be turned off after detection to prevent unnecessary
discharging of the batteries.
Zu (*1): Bei Verwendung der Versorgungseinheiten NiMH
kann es insbesondere bei
relativ neuen Akkus zu einer erhöhten Batteriekapazitätsanzeige kommen. Im Extremfall kann bis zur Hälfte
der Betriebsdauer ein relativ voller Akku angezeigt werden. Danach sinkt die Batteriekapazitätsanzeige dann
deutlich schneller. Dieses Verhalten normalisiert sich mit dem Alter des Akkus bzw. mit der Anzahl der
Lade/Entladezyklen. Der Batteriealarm wird aber unabhängig von diesem Verhalten rechtzeitig ausgelöst.
2.2 Pump confidence signal
During sampling a pump symbol is shown in the display of the Microtector II to indicate trouble-free
The trouble-free operation is indicated on the left side in the display of the
Microtector II by an animated pump symbol.
This symbol blinks when the pump does not work properly.
Further status indication about alarm or failure is given by means of audible, visual or vibration alarm of the
2.3 LowFlow - alarm
During normal pump operation the gas flow is about 0.5l/min. If the gas flow is too low (<0.25l/min) or if
the power supply of the pump motor is interrupted, the Microtector II gives audible, optical or vibration.
Additionally the display shows „Pump Flow error!“
Reason for that can be that the way of gas is possibly blocked or the sampling
line is bent. For proper operation make sure that the gas way is free.
During LowFlow alarm proper detection of the Microtector II cannot be ensured.
2.4 Minimum pump time
For sampling gases out of sewers, rooms or drains a hose (with or without telescopic probe) can be used
that is plugged on the intake. As the response time heavily depends on the inside volume of the intake
appliance the lengths of the appliance shall be as short as possible. For the minimum pump time (T
seconds) you may use the following formula:
= 10s + 3s/m*L
= lengths of hose (inner diameter 5 mm) in meter
= 10s with telescopic probe, 0s without
2.5 Pump monitoring and failure
Display and alarms of the Microtector II are used to indicate the operational status of the G400-MP2 resp. to
trigger fault alarms. Instrument and pump communicate over three gilded contact springs in the middle of
the devices. The Microtector II monitors the communication link permanently.
When the data connection is disconnected, visual and audible alarm is
triggered and the display shows “Pump connection lost!”
This status has to be reset by the middle key (RESET).
When the data connection is disconnected only partially the status of the pump
cannot be monitored correctly. In this case remove the pump from the
Clean dirty contacts of the instrument and spring contacts of the
pump or call GfG-Service.
The circuitry of the G400-MP2 is permanently monitored. A failure being
detected triggers an audible and visual alarm.
Change batteries. In case of failure not being solved call GfG-
2.6 Monitoring battery capacity
The battery capacity of the pump is shown in the display of the Microtector II directly after switching on or
off (see chapter 2.1 „Turning pump on and off“). A sufficient battery capacity and trouble-free operation is
indicated on the left side in the display of the Microtector II by an animated pump symbol.
An low battery of the pump is indicated by
display showing „Pump battery low!“. During
normal measurement display reads a blinking
When the battery of the pump is completely exhausted the display shows
„Pump battery empty! Open blind!“.
The sensor cover has to be slided downwards in order to allow diffusion mode.
2.7 Information about pump
The display of the Microtector II can show certain information about the pump.
Keeping middle key pressed opens the main menu of the Microtector II. Scroll
down with the left key and select menu-point “Pump” with the middle key.
Model, firmware version (FW) and serial number (SN) of the pump are shown.
Status shows actual operational status and error messages as well as battery
Due to the fact that the charging status is calculated from the battery voltage, the value can vary when the
pump is turned on or off.
2.8 Power supply
The pump G400-MP2 can be powered by an alkaline battery module or by a rechargeable NiMH battery pack.
These power supply modules allow a continuous operation for up to 11 hours. The operational time may be
reduced, however, by increased load of the pump motor (e.g. bent sampling line / blocked filter/low ambient
The pump G400-MP2 turns off automatically, if the battery voltage falls below the minimum level needed for
proper functioning. At least 15 minutes before automatic deactivation the battery alarm will be triggered
this case the display shows “Pump battery weak!”
2.8.1 Charging the battery pack
Attention: The unit must not be charged in explosion endangered areas. Charging contacts must
be cleaned. (see appendix chapter 3.1 “Cleaning”)
The rechargeable NiMH battery pack in the G400-MP2 has to be recharged by means of the blue cradle
A trouble-free charging process is only guaranteed if charger lies or is mounted in horizontal position and
when Microtector II is assembled to the charger correctly. The pump charger is powered by GfG’s plug-in
mains unit. Alternatively the Pump Charger may also be connected to a car charging cable. The
Pump Charger limits the voltage for the G400-MP2 to max. 6V.
The charging process is divided into quick and trickle charge. The right green LED signalizes the readiness of
the charger. The right yellow LED signalizes the charging process for the pump (constant light: quick charge,
blinking: trickle charge). Charging a completely discharged battery pack takes about 6-7 hours for quick
charge. After that the charger automatically switches to trickle-charge to prevent over-charge. The display
of the Microtector II does not show the charging status of the pump.
To provide maximum capacity of the battery pack it is necessary to charge only in dependency to the
operational time and frequency. Do not use charger for storing the Microtector II and pump for several
2.8.2 Replacement of batteries and battery pack
The pump must not be opened in explosion endangered areas. You must not replace
the alkaline or rechargeable battery module in hazardous areas.
Always turn the pump off before replacing the alkaline or rechargeable battery module. Watch out for the
correct polarity of the new 1.5V AA alkaline batteries (see battery holder). These batteries must always be
purchased from GfG as the manufacturer of the pump. In-house quality management ensures that only
batteries are used which comply with the requirements of the EC-Type Examination Certificate.
The correct battery types are:
DURACELL PROCELL MN1500 LR6 AA
DURACELL ID1500 AA (LR6)
The batteries may only be replaced in safe areas. Watch out for correct polarity when inserting
the batteries (see picture inside the battery tray). With incorrect polarity the pump will not turn
For replacing the batteries separate the battery
tray from the pump. Unscrew the fixing screws on
the front and pull the battery tray off.
Batteries must not be replaced in EX-areas
Watch out for correct polarity of the new
batteries! (see pictograph on inner side of
Watch out for correct inserting of battery tray!
(Characters on front must be readable.)
Tighten all screws after inserting the battery tray.
Please adhere to disposal notes!
Give the G400-MP2 pump a short sight check after use. Use a damp cloth to remove stains or soiling from the
casing. Never use solvents or cleaning agents! Especially attend that outer charging contact areas and charging
springs are clean. Bad contacts result in incorrect charging of the NiMH battery pack.
Independently from maintenance the user has to do the following checks at least before every shift:
Visual check for damages
Check of battery capacity
Check of sampling performance
3.3 Maintenance and regular function check
Depending on applicational conditions and technical requirements the maintenance is to be effected in intervals
which are to be referred to the application. Maintenance includes measures which retain the nominal status of the
Visual check for damages
Check of filter condition
Check of pump battery capacity
Check of confidence signal
Check of sampling performance
Check of LowFlow alarm
In addition to the above we recommend to get the pump checked for proper functioning by an expert in
combination with the (at least) annual maintenance of the Microtector II series.
Service should be done by the manufacturer. Only genuine spare parts must be used for service
3.5 Changing of filter
For changing the filter, separate the pump from the
Microtector II series and pull the lateral blue cover
backwards. Use a tweezers to remove the filter and
replace it by a new one.
3.6 Spare parts and accessories
Battery tray without alkaline batteries
Alkaline battery (pack of 10)
NiMH-II A21 rechargeable battery pack
NiMH F25 rechargeable battery pack
Sensor cover blue
Filter (pack of 10)
Filter cover blue (pack of 10)
Hose intake 5cm
Sampling tube 30cm
Telescopic probe CrNi 1.36m
Special dust/water filter (pack of 3)
Special sampling line 3m, anti-static, with dust/water filter
Special sampling line 3m, anti-static, with dust/water filter and flow indicator
Viton hose (resistant against solvents and hydrogen sulfide)
3.7 Technical data
0,50 l/min for 0 mm water column
0,35 l/min for 300 mm water column
max.100m hose length (depending on gas and hose)
Sampling inlet during pump mode or
Diffusion inlet when pump is turned off
Display and alarm:
Messages appear in the display of the Microtector II. Acoustic and visual
alarms will be triggered by means of the Microtector II. Vibration alarm
(optionally) integrated in the battery pack.
1. NiMH-battery pack A21 (black case), 2100mAh rechargeable
2. NiMH-battery pack F25 (black case), 2500mAh rechargeable
Im=600mA (max. charging current)
Um=6V DC (max. voltage) or
3. Alkaline batteries (grey case), not rechargeable
with 2x Mignon 1.5V type: DURACELL PROCELL MN1500 LR6 AA or
DURACELL ID1500 AA (LR6)
Charging time of the NiMH
Pump ON: > 9h (NiMH battery pack F25)
approx. 9h (NiMH-II battery pack A21)
approx. 10h (Alkaline batteries)
Pump OFF: approx. 10 days (Gas Detector ON)
approx. 200 days (Gas Detector OFF)
for operation: -20...+55 °C | 5...95% r.h.
for storage: -25...+55 °C | 5...95% r.h. (recommended 0...+30°C)
Material: Plastic and rubberized compund
Dimensions: 68 x 109 x 21 (57) mm (W x H x D)
Weight: 180g with alkaline battery pack or 195g with NiMH battery pack
Approvals and certificates:
Labelling and ignition
II2G Ex ia IIC T4
-20°C≤Ta≤+55°C for NiMH-II (black)
Ex ia IIC T3
-20°C≤Ta≤+55°C for NiMH (black)
Ex ia IIC T4/T3 -20°C≤Ta≤+45°C/+55°C for Alkaline (grey)
I M1 Ex ia I Ma
BVS 07 ATEX E 011
(without measuring function)
Electro magnetic compatibility:
DIN EN 50270:2006 Radio shielding:
Type class I
Interference resistance: Type class II
(by notified body – DEKRA EXAM GmbH)
of Gas Detection Solutions
Edition: 22. April 2016,
We reserve the right of modification, Firmware Version 2.01
GfG Gesellschaft für Gerätebau mbH
Kloennestr. 99, D-44143 Dortmund
Phone: +49(0)231 – 564 00-0
Fax: +49(0)231 – 51 63 13
3.8 EC-Type Examination
Type Examination Certificate