Potential separation
taic relays and a potential difference of maximum 50 VDC or 60 VAC is per-
missible between them. However, sensors combined within one plug and
sensors with their own power supply are electrically interconnected and must
therefore be operated in isolation. The voltage at the measuring inputs them-
selves (between B, C, D and A or - ) must not exceed 5 volts.
The power supply is isolated by means of DC/DC converter ZA2690-UK. Data
and trigger cables are equipped with optocouplers. If analog output cables are
not electrically isolated the recording device or the sensors must be zero-po-
tential.
9. DISPLAY AND KEYPAD
9.1 Display
he display on the ALMEMO
®
2470 series is an illuminatable 5-color segmented
LCD (5); it comprises 5x 16-segment digits (e) for the measured value, 2x 16-
segment digits (d) for the units, 4½x 7-segment digits (b) for various measuring
functions (a), and a row of symbols (f) for the operating status.
Function field
Main field
Status bar
Display of functions in function field
Measuring point
Maximum / minimum value
Limit values, maximum and minimum
Stored individual value
Memory capacity
Temperature value from double sensors
ALMEMO
®
2470
19
MAX
36
.
5
M
36
.
2
M
O
26
.
5
°C
PO1
MIN
17
.
3
2O
.
O
