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VALTRONICS MODEL 2008SDH-2AP  

 

CARBON DIOXIDE MONITOR 

 

INSTRUCTION MANUAL 

 

Copyright 2017 VTI-Valtronics Inc.   

 

11 

 

VIII.  ASSISTANCE OR TECHNICAL SUPPORT 

Before calling for assistance or technical support, please refer to the technical note above. If 
you still need help, follow the instructions below. 

 

When calling, please know the purchase date, the complete model and serial number of the 
unit. This information will help us to better respond to your request. 

 

If you need to send the unit to us for repair, please contact the sales department. You will be 
issued an RMA (Returned Materials Authorization) number and instructions on how to return 
the unit. Please allow 2 – 4 weeks turnaround time, depending on the problem. 

 

Phone: (209) 754-0707 • FAX (209) 754-0104 • e-mail: 

[email protected]

 

 

 

IX. 

WARRANTY 

Valtronics warrants that the original items furnished under this warranty will be free from 
defects in material and workmanship. This warranty is exclusive and in lieu of all other 
warranties whether written, oral, or implied (including any warranty of merchantability of 
fitness for purpose). If it appears within 12 months from the date of invoice that this material 
does not meet the warranty specified above, and you notify us of this promptly, we shall 
correct any defect or any nonconformancy to the specifications, either (at our option) by 
repairing any defective part of parts which are returned to us freight prepaid or by making 
available at your plan (via lowest freight rate) a repaired or replacement material or at 
Valtronics option to credit the customer the original purchase of the item. Our liability to you 
arising out of the supplying of this material, or its use, whether on warranty, contract, or 
negligence, shall not in any case exceed the cost of correcting defects in the material, as 
herein provided, and upon the expiration of the warranty period all such liability shall 
terminate. The foregoing shall constitute your sole remedy and our sole liability. 

In no event 

shall we be liable for special or consequential damages. 

This warranty does not include 

abuse of malicious damage. 
 
If equipment returned during the warranty period is found to have nothing wrong with it, 
there will be a $198.00 handling charge. There is a minimum of a $198.00 charge for 
equipment returned for out of warranty repair. 
 
Please call for an RMA (Return Material Authorization) number before sending any 
equipment back. Items returned for repair must be accompanied by a purchase order. 
Equipment repair not covered by warranty will be billed on material and labor basis. There 
will be an additional 60% “end-user” charge for customers who did not purchase the 
equipment directly from Valtronics. Equipment must be sent to Valtronics prepaid and return 
transportation will be billed as part of the repair. Valtronics will not be responsible for 
damage due to improper packaging of the item returned for repair.   
 

 

Содержание 2008SDH-2AP

Страница 1: ...Phone 209 754 0707 FAX 209 754 0104 e mail vti val tronics com http val tronics com MODEL 2008SDH 2AP CARBON DIOXIDE MONITOR Instruction Manual ...

Страница 2: ...m 2 B Power Supply 2 C Circuit Board 2 Figure 1 Model 3 D Gas Cell Detector 4 Figure 2 Gas Cell 4 III INSTALLATION A Circuit Board 5 B Wiring 5 C Start up Precaution 5 IV OPERATION 5 Figure 3 Diagram 6 V SERVICING A Zero Adjustment 6 B Span Adjustment 7 VI SPECIFICATIONS 8 VII TECHNICAL NOTES 9 Figure 4 Ground Loops 9 Figure 5 Using a Filter 10 VIII ASSISTANCE TECH SUPPORT 11 IX WARRANTY 11 ...

Страница 3: ...erate the instrument s electronics It consists of diode protection against reverse polarity of the 12VDC input power and solid state regulators to provide constant voltages for operation of various electronic circuits C Circuit Board All circuit components are mounted on a glass epoxy printed circuit board This board includes the gas detection amplifier electronic components integrated circuits po...

Страница 4: ...VALTRONICS MODEL 2008SDH 2AP CARBON DIOXIDE MONITOR INSTRUCTION MANUAL Copyright 2017 VTI Valtronics Inc 3 FIGURE 1 Valtronics Model 2008SDH 2AP ...

Страница 5: ...at most gases absorb infrared energy at a characteristic frequency In this instrument a broadband infrared source emits energy that is then filtered to produce a narrow range of frequencies characteristic of the carbon dioxide absorption spectra The band pass filter is chosen to match a strong absorption band of carbon dioxide while avoiding absorption bands from other gases that may be present An...

Страница 6: ...o 16VDC has at least a 0 5 amp capacity The unit does not require a regulated supply 4 A dedicated power supply will also help avoid any ground loop problems with recorders or control circuits connected to the signal output of the unit 5 Separate wires are required for both the Common 4 20mA output and the Common 0 1V output if using both IV OPERATION See Figure 3 1 Apply 12VDC power to the unit a...

Страница 7: ...gas cell 4 Before applying power connect a voltmeter to the 0 1V signal output 5 Verify that the unit has had at least a 5 minute warm up before attempting any adjustments 6 Make sure the flow meter is in a vertical upright position Open the regulator flow valve slowly while observing the flow meter 7 Adjust the flow to about 50 ml min ml cc or about 1 SCFH Standard Cubic Feet per Hour 8 After 3 m...

Страница 8: ...nts are made Perform a span adjustment if required 5 Refer to the scale data charts which can be found on the data spec sheets on our website for the corresponding output voltage that matches the sample gas concentration 50 full scale units http www valtronics com assets 2008SD50 PDF 100 full scale units http www val tronics com assets 2008S100 PDF 6 Depending on the signal output reading turn the...

Страница 9: ...VDC absolute min max Power Consumption Less than 3 watts 12 0 VDC 2 4 watts typical 7 2 watts peak Output Signals Voltage Output 0 to 1 volt 0 to full scale CO2 Current Output 4 to 20 mA 0 to full scale CO2 Zero Drift at Constant Temperature Less than 2 of full scale per 24 hours random not cumulative Zero Noise at Constant Temperature Less than 10 mV peak to peak measured at V out during any 20 s...

Страница 10: ...e resistance of the wires The current flowing through the wire resistance creates a voltage drop current times resistance that would appear to be noise if the two loops were connected together This is classically called a ground loop problem 2 EMI Electro Magnetic Interference The infrared detector and its amplifiers are sensitive to strong magnetic fields that are building and collapsing at 50 Hz...

Страница 11: ...VALTRONICS MODEL 2008SDH 2AP CARBON DIOXIDE MONITOR INSTRUCTION MANUAL Copyright 2017 VTI Valtronics Inc 10 FIGURE 5 ...

Страница 12: ... defective part of parts which are returned to us freight prepaid or by making available at your plan via lowest freight rate a repaired or replacement material or at Valtronics option to credit the customer the original purchase of the item Our liability to you arising out of the supplying of this material or its use whether on warranty contract or negligence shall not in any case exceed the cost...

Страница 13: ...VALTRONICS MODEL 2008SDH 2AP CARBON DIOXIDE MONITOR INSTRUCTION MANUAL Copyright 2017 VTI Valtronics Inc 12 NOTES ...

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