Oldham MX48 Commissioning, Operating And Maintenance Manual

47, 48 Case 2 Measuring channel connected to a detector with no integrated electronics and supplying a standardized 4-20 mA current. (CTX50, CTX100, CTX200, CTX870, etc.). • Prepare the detector for calibration: - See the remarks for zero adjustment in pure air and natura…

11, 12 2.3.3. 2-wire detectors 4-20 mA: 2 connecting wires for shielded cable - Resistance of detector / unit cable: 32 ohms maximum per wire, i.e. 64 ohms in loop (2 km for cable 2 x 1.5 mm²). - Connection on MX48 unit: see Fig. 11. – Example 2 2.3.4. FIRE detectors:…

75, 76 Bornier du Ventostat 1 2 3 Boutons Ne pas toucher SVP +DC 0V Signal: 4-20mA Bornier de voie de mesure du MX48 (voir fig 12) BRANCHEMENT D'UN CAPTEUR TYPE VENTOSTAT VT SUR LE Figure N°20 MX48 terminal block (see figure 12) Ventostat VT terminal block Buttons Please do not …

25, Oldham MX48 26 3.3.4. Fault thresholds Processing of detector faults Each channel detects the following faults. For toxic and explosive gas detectors: - line interrupted (0 mA), - line short-circuited or excessive consumption, - negative offset (more than 20% of measuring scale), …

9, 10 2 2 . . I I N N S S T T A A L L L L A A T T I I O O N N A A N N D D C C O O N N N N E E C C T T I I O O N N S S 2.1. Installation: recommendations The MX48 unit can be installed in any premises without an explosive atmosphere. They should preferably be pl…

54, 55 7 7 . . D D E E T T A A I I L L E E D D T T E E C C H H N N I I C C A A L L C C H H A A R R A A C C T T E E R R I I S S T T I I C C S S MANUFACTURER OLDHAM 62000 ARRAS - FRANCE BOX - Wall-mounted box dimensions : 500 x 340 x 89 - Function: me…