Installation & Operation Manual
Inputs
Flowmeter
Type P
NPN/PNP, open collector, reed switch, active pulse signals 8…12 and 24V
Frequency
Minimum 0 Hz, maximum 7 kHz for total and flow rate
Maximum frequency depends on signal type and internal low-pass filter
Example: Reed switch with low-pass filter: maximum frequency is 120 Hz
K-Factor
0 000010…9,999,999 with variable decimal position
Low-pass filter
Available for all pulse signals
Outputs
Analog Output
Function
Transmitting flow rate
Accuracy
10 bit Error < 0 05% Updates 10 times a sec
Software function is to calibrate the 4 00 mA and 20 00 mA levels precisely within setup
Load
1 kOhm max
Type ER-420-AC and
ER-420-DC
Passive galvanically isolated output
Type AP
Passive 4…20 mA output; output loop powered
Transistor Output
Pulse output
Maximum frequency is 60 Hz Pulse length is user-definable between 7 8 msec up to 2 secs
Function
One pulse output, transmitting accumulated total
Type ER-420-AC and
ER-420-DC
Isolated mechanical relay output; maximum switch power is 230V AC to 0 5A
ER-420-LP
Passive transistor output, not isolated Load maximum is 50V DC to 300 mA
Operational
Operator Functions
Displayed functions
•
Total
and/or
Flow Rate
•
Total
and
Accumulated
Total
•
Total
can be reset to zero by pressing the
CLEAR
key twice
•
Multiplication factor: x1, x10, x100, x1000, x10000
Total
Digits
7 digits
Units
L, m
3
, GAL, USGAL, kg, lb, bbl, __ (no unit)
Decimals
0, 1, 2, or 3
Note
Total
can be reset to zero
Accumulated Total
Digits
11 digits
Units / decimals
According to selection for
Total
Flow Rate
Digits
7 digits
Units
mL, L, m
3
, mg, g, kg, ton, GAL, bbl lb, cf, REV, __ (no unit), scf, Nm
3
, NL, P
Decimals
0, 1, 2, or 3
Time units
sec, minute, hour, day
Page 35
March 2013