Archive:CALMU3

Calmu3 (possibly Calmu3+) from Polymeters Response International. "The first microprocessor-based meter", using "FFT, rather than 'brute-force' DSP" [1]

I think I read somewhere that Calmu3 (minus the +) lacks CoP5 approval.

It may need calibration periodically, but that's probably up to the supplier.

Details

• Serial no: P99A01869
• Part no: C3DBD0BC0SJ (3 phase direct, class 1 accuracy, lithium backup, ?)

Interfaces

• Infrared PACT port (this is a standard - possible adapter)
• Serial port ("for PC, modem or PACTLAN")

Software with support

• Principal (DOS) or Ease II (can't get this to run on XP due to .vbx; probably needs 2000; uses stopcopy protection) from PRI
• mv-rs, and possibly other Itron stuff
• Ziphany http://www.ziphany.com/Files/Supported_Meters.pdf

Resources

A later model, with overview.

Presumably ex-PRI consultant on Calmu meters

Serial protocol

1200bps ASCII, \r terminated

Once a command is matched, all the remainder of the line is ignored.

Commands

F	Frequency, updated per sample	"F=50.138\r"
N	?	ff
R	(Real?) time	"R=15:00:40\r"
S	Serial number (presumably "=" doesn't fit)	"SP99A01869\r"
s	?	"s=", dword 0xa605019e, dword 0, "\r"
u	(probably unimplemented)	"U\r"
x	?	ff