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GDS Corp.      2513 Hwy 646 Santa Fe, Texas 77510      (409) 927-2980      (409) 927-4180 fax  

Quickstart Guide  

GASMAX / EC Gas Monitor for EC Sensors 

www.gdscorp.com      [email protected] 

IMPORTANT

 - Before installing the GASMAX EC, 

make sure there are no toxic or combustible gases 

are present. Declassify the area if necessary.  

Factors such as air movement by fans, prevailing 

winds, convection, gas density, emission sources and 

environmental variables should be taken into account 

when determining sensor location. As with all sensors, 

the GASMAX /EC should be protected from falling or 

directed water, snow, shock, vibration and dirt. 

Use conduit and installation practices approved for the 

appropriate area classification. When installed with 

#10-0247 Stainless Steel sensor head, the GASMAX /

EC is certified for use in areas rated Class 1, Div 1, 

Groups B, C & D.  

If desired, the GASMAX / EC can be installed  as 

‘intrinsically safe’. This requires the installation of a 

barrier in the wiring to limit the maximum current 

flow (see drawing on back). If equipped with #10-

0247IS Aluminum sensor head, the GASMAX / EC 

must 

be installed as Intrinsically Safe if used in a 

rated hazardous area. 

Remove the GASMAX / EC display assembly by 

unscrewing the explosion-proof cover, loosening the 

two thumbscrews and removing the electronics 

assembly. The display board is located on the back of 

the electronics assembly (See Figure 1).  

Attach the two current loop wires to the display board 

connector TB1. Polarity is NOT important.  

Reattach the display assembly to the enclosure and 

replace the explosion proof cover.  

Fig 1. GASMAX / EC Display Board 

Fig 2. GASMAX / EC Dimensions 

INSTALLATION 

WIRING 

CALIBRATION 

¾" N.P.T. Hub
2 Places

4.61

8.0

Universal
Sensor Head

.25" Dia.
2 Places

5.50

5.3

Dimensions in inches

Apply power and allow the instrument to warm up for a 

minimum of three (3) hours.  

Hold the magnetic wand next to the CAL button (lower left 

side of display) until the screen indicates CAL? Hold the 

wand over the EDIT button to confirm calibration mode.  

Follow the on-screen instructions to calibrate the unit. When 

calibration is complete, the GASMAX / EC will indicate CAL 

DELAY and then resume normal operation. For more 

information, please read the GASMAX / EC Users Manual 

supplied with the unit.  

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