Archive:CALMU3

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Equals symbols are shown on some variables, but presumably wouldn't fit for many.
 
Equals symbols are shown on some variables, but presumably wouldn't fit for many.
  
−
Once a 'N', 's', 'u' or 'x' are matched, all the remainder of the line is ignored.  This suggests they might be for switching to a different protocol, or buggy code. 'u' is definitely buggy.
+
'N', 's', 'u' or 'x' seem to be special-cased for some reason.
 +
If a valid index isn't provided for 'N' or 'x', the meter returns '\xff' with no '\r', so take steps to prevent this.
 +
If a valid index isn't provided for 'u', 'U\r' is returned.
 +
's' always seems to return the same value.
  
 
=== Commands ===
 
=== Commands ===
Line 42: Line 45:
 
| Frequency, updated per sample
 
| Frequency, updated per sample
 
| <code>"F=50.138\r"</code>
 
| <code>"F=50.138\r"</code>
−
|-
 
−
! N
 
−
| Switch protocol?
 
−
| <code>ff</code>
 
 
|-
 
|-
 
! R
 
! R
Line 62: Line 61:
 
| (probably unimplemented)
 
| (probably unimplemented)
 
| <code>"U\r"</code>
 
| <code>"U\r"</code>
−
|-
 
−
! x
 
−
| Switch protocol?
 
−
| <code>ff</code>
 
 
|-
 
|-
 
! B[AVWvw]
 
! B[AVWvw]
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|-
 
|-
 
! u[AVWvw]
 
! u[AVWvw]
−
| ?
+
| Units (duplicate?)
 
|
 
|
 
<code>
 
<code>

Revision as of 17:08, 6 November 2010

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, but the picture in the manual shows the same as ours.

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, C?)

Interfaces

Software with support

Resources

A later model, with a nice overview of available metrics.

Presumably ex-PRI consultant on Calmu meters

Serial protocol

1200bps ASCII, \r terminated

Equals symbols are shown on some variables, but presumably wouldn't fit for many.

'N', 's', 'u' or 'x' seem to be special-cased for some reason. If a valid index isn't provided for 'N' or 'x', the meter returns '\xff' with no '\r', so take steps to prevent this. If a valid index isn't provided for 'u', 'U\r' is returned. 's' always seems to return the same value.

Commands

F Frequency, updated per sample "F=50.138\r"
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"
B[AVWvw] ?

  • "BAA3123B"
  • "BV182B85"
  • "BW918D2F"
  • "Bv05B6CE"
  • "Bw01B525"

I[123] Current

  • "I1+15.230"
  • "I2+0.0000"
  • "I3-0.0300"

K[123AVW] ?

  • "K1+2.0700"
  • "K2+0.0000"
  • "K3+0.0100"
  • "KA+2.0600"
  • "KV-1.3300"
  • "KW+1.6300"

L[123] Load?

  • "L1+9.0200"
  • "L2+0.0100"
  • "L3+0.0200"

P[123] ?

  • "P1+1.6400"
  • "P2-0.0000"
  • "P3+0.0000"

Q[123A] ?

  • "Q1=0.769-"
  • "Q2=1.000+"
  • "Q3=1.000+"
  • "QA=0.787-"

U[AVWvw] Units

  • "UA=2631984"
  • "UV=0349470"
  • "UW=2549220"
  • "Uv=0177551"
  • "Uw=0000001"

V[123] Voltage

  • "V1+236.75"
  • "V2+240.72"
  • "V3+242.45"

i[123] Current?

  • "i1-5.6300"
  • "i2-0.0000"
  • "i3-0.0100"

p[123] ?

  • "p1-1.3400"
  • "p2+0.0000"
  • "p3-0.0100"

u[AVWvw] Units (duplicate?)

  • "UA=2631986"
  • "UV=0349470"
  • "UW=2549221"
  • "Uv=0177552"
  • "Uw=0000001"

?

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