ENMET Corporation
PO Box 979
Ann Arbor, MI 48106-0979
GS-24-DF
Manual
80003-142
October 2003
MCN-314, 12/05/03
Table of Contents
1.0 INTRODUCTION ...............................................................................................................................................................1
1.1 U
NPACK ............................................................................................................................................................................. 1
1.2 C
HECK ORDER.................................................................................................................................................................... 1
1.3 SERIAL NUMBERS............................................................................................................................................................... 1
2.0 FEATURES.......................................................................................................................................................................... 2
3.0 INSTALLATION.................................................................................................................................................................3
4.0 DISPLAY SETTINGS......................................................................................................................................................... 4
4.1 C
HANGING DISPLAY SETTINGS........................................................................................................................................... 4
5.0 MAINTENANCE.................................................................................................................................................................5
5.1 P
UMP DIAPHRAGM REPLACEMENT......................................................................................................................................5
5.2 C
HECK VALVE HOUSING REPLACEMENT............................................................................................................................ 6
6.0 WARRANTY .......................................................................................................................................................................7
List of Illustrations
FIGURE 1: FRONT VIEW ................................................................................................................................................2
F
IGURE 2: INTERIOR VIEW ............................................................................................................................................3
FIGURE 3: PUMP FEATURES .........................................................................................................................................5
FIGURE 4: DIAPHRAGM DETAILS................................................................................................................................... 5
F
IGURE 5: CHECK VALVE HOUSING REPLACEMENT DETAILS .........................................................................................6
FIGURE 6: PROPER ORIENTATION OF CHECK VALVE HOUSING AND GASKET .................................................................. 6
1.0 Introduction
The ENMET GS-24-DF is designed to be used with most ENMET Corporation stationary sensor/transmitters.
Specifications:
Flow Range
Power
Alarm Relay
Digital Display
Alarms
NOTE: All specifications stated in this manual may change without notice.
1.1 Unpack
Unpack the GS-24-DF and examine it for shipping damage. If such damage is observed, notify both ENMET
customer service personnel and the commercial carrier involved immediately.
Regarding Damaged Shipments
NOTE: It is your responsibility to follow these instructions. If they are not followed, the carrier will
not honor any claims for damage.
This shipment was carefully inspected, verified and properly packaged at our company and delivered to the
carrier in good condition.
When it was picked up by the carrier at ENMET, it legally became your company’s property.
If your shipment arrives damaged:
• Keep the items, packing material, and carton “As Is.” Within 5 days of receipt, notify the carrier’s local
office and request immediate inspection of the carton and the contents.
• After the inspection and after you have received written acknowledgment of the damage from the carrier,
contact ENMET Customer Service for return authorization and further instructions. Have your Purchase
Order and Sales Order numbers available.
ENMET either repairs or replaces damaged equipment and invoices the carrier to the extent of the liability
coverage, usually $100.00. Repair or replacement charges above that value are your company’s responsibility.
The shipping company may offer optional insurance coverage. ENMET only insures shipments with the
shipping company when asked to do so in writing by our customer. If you need your shipments insured, please
forward a written request to ENMET Customer Service.
0 – 1 lPM, 2 – 0 CFM, or 0 – 2000 CCM
24 V
DC
Positive safety, 2
Backlit
Audio and LED indicators
A 30VDC, 0.4A 115VAC
Regarding Shortages
If there are any shortages or questions regarding this shipment, please notify ENMET Customer Service within 5 days
of receipt at the following address:
ENMET Corporation
680 Fairfield Court
Ann Arbor, MI 48108
734-761-1270 734-761-3220 Fax
1.2 Check Order
Check, the contents of the shipment against the purchase order. Verify that the GS-24-DF is received as ordered. If
there are accessories on the order, ascertain that they are present. Check the contents of calibration kits. Notify
ENMET customer service personnel of any discrepancy immediately.
1.3 Serial Numbers
Each GS-24-DF is serialized. These numbers are on tags on the equipment and are on record in an ENMET database.
1
2.0 Features
See Figure 1 and 2
Feature Description
Power Terminal
Display
Indicator LED
Sampling Pump
Pushbutton Switch
Potentiometer
Inlet Port
Outlet Port
Gas Sensing Chamber
This terminal provides connections for: the DC power (24 V
power source, Sensor/Transmitters and 4-20mA
LCD, Allows the user to verify and monitor the flow rate of the air sample. Standard flow
rate, approximately 05 lpm(liter per minute).
Green/Red: When green indicates flow rate is sufficient.
Yellow: When on solid indicates GS-24-DF is in menu to change settings
This electromagnetic diaphragm pump draws the air sample from the test area to the sensor
chamber.
SW1: Menu Switch, this switch is for viewing/changing display settings.
SW2: Select Switch, this switch is for temporary deactivating audio alarm and changing
display settings.
Flow Adjustment Potentiometer (POT)
This port draws the air sample from the test area. For external piping, use ¼″ O.D. tubing.
See section 4 for type of tubing to be used.
This port expels the air sample after it passes the sensor. For external piping, use ¼″ O.D.
tubing
This chamber directs the air sample to the gas sensor. Varies, depending on the type of
sensor/transmitter.
DC) supplied from external
When red indicates flow rate is inadequate.
When flashing indicates GS-24-DF is in menu to calibrate(factory use only)
Inlet Port
Power Terminal
Outlet Port
Gas Sensing
Chamber
Flow Rate Indicator Red when in Alarm
Menu Indicator Yellow when in Menu Mode
Potentiometer for
Flow Adjustment
Pushbutton switch SELECT (SW2)
Pushbutton switch MENU (SW1)
Figure 1: Front View
2
Display
Gas
Sensing
Chamber
Output
SW1
ENU Switch
M
SW2
S
ELECT Switch
Pump
POT
Flow Adjust
Figure 2: Interior View
3.0 Installation
The GS-24-DF needs to be level and as close to the area to be monitored as possible, to reduce transport time to
the sensor/transmitter.
• Sensor/Transmitters can be located within the GS-24-DF or remotely.
• Inlet tubing must be compatible with the target gas.
Non reactive gases Standard vinyl or tygon tubing, ENMET part number 73073-001
Reactive gases Teflon lined vinyl or tygon tubing, ENMET part number 73073-029
• Caution should be used to insure that fluids do not enter the inlet tubing.
• Some types of gases require that the sample gas be removed from the area.
This is accomplished with the outlet port.
• Power is supplied from an external source.
Connect 24 V
• Note 12Vdc output is available on the pump module.
• After installing all the tubing and the sensor/transmitter, verify that there are no leaks in the system.
Verification should be done by plugging the inlet tube.
If the system is correct the flow meter reads zero and the flow alarm activates.
If this does not happen, check all fittings and seals.
DC to terminal block positions 1 and 3.
3
4.0 Display Settings
To display the current settings of the GS-24-DF use the push button switches. See figures 1 and 2 for
location of switches.
Access the M
To cycle through the display settings press:
M
ENU switch once = Low Flow alarm setting.
ENU switch twice = High Flow alarm setting.
M
MENU switch three times = Audio alarm on or off.
ENU switch four times = Raw sensor signal in millivolts.
M
To disable audio alarm press:
S
ELECT switch once = Audio Alarm (horn) disabled for approximately 1 minute.
4.1 Changing Display Settings
To change the current setting of the GS-24-DF use the push button switches.
ENU and SELECT switches through holes in front. See figures 1 and 2.
Press and hold M
ENU switch for three seconds, display will indicate Units
Press MENU switch again, once for each setting: SET LO, SET HI, Set audio or Display menu.
When Units is displayed: Press S
Press M
ELECT switch to change value.
ENU switch to step through the values: LPM, CCM, CFM
Press SELECT switch to exit, Display steps to SET LO
When SET LO is displayed: Press S
Press M
ELECT switch to display the value.
ENU switch to change the value.
Press SELECT switch to Exit
When SET HI is displayed: Press S
Press M
ELECT switch to display the value.
ENU switch to change the value.
Press SELECT switch to Exit
When SET AUD is displayed: Press S
ELECT switch to display On or Off.
Press MENU switch to change
Press SELECT switch to Exit
When DISPLAY is displayed: Press S
Press M
ENU switch for Flow Dsp or Go/NoGo.
ELECT switch to display On or Off.
Press SELECT switch to Exit
4
5.0 Maintenance
Diaphragm
Check Valve
Housing
Mounting
Screws
3 places
Top View Side View
Figure 3: Pump Features
5.1 Pump diaphragm Replacement
If the diaphragm becomes damaged or torn, it can be replaced.
Replacement diaphragm ENMET part number 04018-117.
Star Head
Screw
2 places
Pump Arm
Figure 4: Diaphragm Details
Remove 2 star head screws and pump arm. See figures 3 and 4.
Remove damaged diaphragm from pump arm and replace with new diaphragm.
Reattach pump arm and verify diaphragm is properly sealed to check valve housing.
5
5.2 Check Valve Housing Replacement
If the check valve becomes damaged or to warn to operate correctly it can be replaced.
Pump repair kit ENMET part number 04018-116.
WARNING: The check valve housing and associated gasket must be installed in the proper position for the
pump to operate correctly. If they are installed improperly the pump will flow in the wrong
direction.
Remove the outlet fittings, pump arm with diaphragm and note the orientation of the check valve hosing and gasket.
See figures 5 and 6.
Remove flat-head screw and check valve housing.
Figure 5: Check Valve Housing Replacement Details
Verify that gasket and housing are in the proper position.
Verify Gasket Verify Housing position – Inside and Outside
Figure 6: Proper Orientation of Check Valve Housing and Gasket
Replace check valve housing with flat head screw.
Verify proper position of check valve housing.
Reattach pump arm and reseal diaphragm
Reattach outlet fittings.
6
6.0 WARRANTY
ENMET warrants new instruments to be free from defects in workmanship and material under normal use for a period
of one year from date of shipment from ENMET. The warranty covers both parts and labor excluding instrument
calibration and expendable parts such as calibration gas, filters, batteries, etc... Equipment believed to be defective
should be returned to ENMET within the warranty period (transportation prepaid) for inspection. If the evaluation by
ENMET confirms that the product is defective, it will be repaired or replaced at no charge, within the stated
limitations, and returned prepaid to any location in the United States by the most economical means, e.g. Surface
UPS/RPS. If an expedient means of transportation is requested during the warranty period, the customer is responsible
for the difference between the most economical means and the expedient mode. ENMET shall not be liable for any
loss or damage caused by the improper use of the product. The purchaser indemnifies and saves harmless the
company with respect to any loss or damages that may arise through the use by the purchaser or others of this
equipment.
This warranty is expressly given in lieu of all other warranties, either expressed or implied, including that of
merchantability, and all other obligations or liabilities of ENMET which may arise in connection with this equipment.
ENMET neither assumes nor authorizes any representative or other person to assume for it any obligation or liability
other than that which is set forth herein.
NOTE: When returning an instrument to the factory for service:
Be sure to include paperwork.
A purchase order, return address and telephone number will assist in the expedient repair and return of your unit.
Include any specific instructions.
For warranty service, include date of purchase
If you require an estimate, please contact ENMET Corporation.
There are Return for Repair Instructions and Form on the last pages of this manual. This Form can be copied or used
as needed.
7
Notes:
8
PO Box 979
680 Fairfield Court
Ann Arbor, Michigan 48106-0979
734.761.1270 Fax 734.761.3220
Returning an Instrument for Repair
ENMET instruments may be returned to the factory or any one of our Field Service Centers for regular
repair service or calibration. The ENMET Repair Department and Field Service Centers also perform
warranty service work.
When returning an instrument to the factory or service center for service, paperwork must be included
which contains the following information:
¾ A purchase order number or reference number.
¾ A contact name with return address, telephone and fax numbers
¾ Specific instructions regarding desired service or description
of the problems being encountered.
¾ Date of original purchase and copy of packing slip or invoice
for warranty consideration.
¾ If a price estimate is required, please note it accordingly and be
sure to include a fax number.
Providing the above information assists in the expedient repair and return of your unit.
Failure to provide this information can result in processing delays.
ENMET charges a one hour minimum billing for all approved repairs with additional time billed to the
closest tenth of an hour. All instruments sent to ENMET are subject to a minimum $30 evaluation fee,
even if returned unrepaired. Unclaimed instruments that ENMET has received without appropriate
paperwork or attempts to advise repair costs that have been unanswered, after a period of 60 days,
may be disposed of or returned unrepaired COD with the evaluation fee.
Service centers may have different rates or terms. Be sure to contact them for this information.
Repaired instruments are returned by UPS/RPS surface and are not insured unless otherwise
specified. If expedited shipping methods or insurance is required, it must be stated in your
paperwork.
Note: Warranty of customer installed components.
If a component is purchased and installed in the field, and fails within the warranty term, it can
be returned to ENMET and will be replaced, free of charge, per ENMET’s returned goods
procedure.
If the entire instrument is returned to ENMET Corporation with the defective item installed, the
item will be replaced at no cost, but the instrument will be subject to labor charges at half of the
standard rate.
Repair Return Form
Mailing Address:
ENMET Corporation
PO Box 979
Ann Arbor, Michigan 48106
Phone Number: 734.761.1270
FAX Number: 734.761.3220
Your Mailing Address:
Contact Name: __________________________ Your Phone: _______________________
Your PO/Reference Number: _______________ Your FAX: _______________________
Shipping Address:
ENMET Corporation
Attn: Repair Department
680 Fairfield Court
Ann Arbor, Michigan 48108
Your Shipping Address:
Payment Terms: T COD
(Check one) T VISA / MasterCard______________________ ________
Card number Expiration
Return Shipping Method:
T UPS/RPS Surface: T 3 day T 2nd Day Air T Next Day Air
T Federal Express: T Next Day Morning T Next Day AfternoonT Standard
T FedEx Account number: ________________________
Would you like ENMET to insure the return shipment?
T No T Yes Insurance Amount: $_________________
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