98
Communication setup
8.
Measure the current on the selected output using the multimeter and enter the
measured value using the numeric keypad. Press
ACCEPT
to complete the
calibration.
By entering the measured current values, the microprocessor will electronically adjust the
outputs to compensate for the difference between the measured values and the expected
values.
8.4 Alarm relays
WARNING: Alarm relay contacts are rated for low voltage applications only. Do not
switch power in excess of 28Vrms, 5A.
Four alarm relay outputs are available as a factory installed option. The relays are
mounted in an external NEMA 4X enclosure for installation to a wall or panel. Alarm
contacts are rated for 5A at 28Vrms maximum (resistive load).
The alarm wiring can be sized according to the load being used. The relay connector will
accept wire sizes from 18–12 AWG with a rating of 300 V, 80 °C minimum. Do not use
wire smaller than 18 AWG.
For relay pin assignments refer to
Table 17
and
and
.
Figure 29 Calibration with the meter in the loop
Figure 30 Calibration with the 4-20mA device disconnected from the loop
Goodnal STP ST041 Pre Treatment (Sigma 900 MAX All Weather Refrigerated Sampler) Vendor Manual
Q-Pulse Id VM373
Active 29/10/2013
Page 98 of 122
