MSA SUPREMA - MAI Module - from Instrument Status C; Setting the Sensor Current; Figure 6-11: Display and Operation Elements of the MAI Module - Instrument Status C

REV 0, June 2005Page 172
Operation Manual SUPREMA
6. Startup
Person 1:
• Select the SPAN function by pressing the SEL button. Allow a certain recovery time
(voltage signal stops fluctuating or fluctuates only slightly).
• Set the value corresponding to that of the test gas concentration by pressing the UP
or DOWN button. The voltage value is calculated by means of the following formula:
U = C / 100
*
1.6 V + 0.4 V
U is the voltage at the test jack in V, C the span gas concentration in % of measuring
range.
Attention: This formula does not apply to D-8108, D-8113, DF-8201, DF-8250,
DF 8401 or DF-8603 sensors or to any of the connectable sensors with a highly
nonlinear output signal.
Person 2:
• Shut off the test gas when person 1 informs you that the preliminary sensitivity
adjustment has been completed
Repeat these steps for each of the passive sensors to be connected.
Disable operator keys by pressing the SEL-Button until the INPUT LED go out.
6.3.4 MAI Module – from Instrument Status “C”
6.3.4.1 Setting the Sensor Current
Figure 6-11: Display and Operation Elements of the MAI Module – Instrument Status “C”