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
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