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Re: Bird Meter Calibration
To: CRTech <crtech@crtech.org>
Subject: Re: Bird Meter Calibration
From: Mark Bohnett <mbohnett43@bevcomm.net>
Date: Sat, 01 Jul 2017 10:15:28 -0500
I was told that if the unit was in line to measure (instead of indirect method) the output, you need to have a separate set of slugs (never used any other time) that are used as a calibration comparison.  It requires that you buy the second set originally so both are calibrated to the line section.

Mark (MN)

Sent from my Verizon Wireless 4G LTE DROID

John Stortz <ka4flx@gmail.com> wrote:

Are you relying on the Bird for remote metering? We used one mainly for high VSWR alarms & protection. Bird told me they couldn't guarantee a calibration unless I sent in the whole thing, including the line section. There was nothing to replace the line section, so unable to send in for calibration.

A Bird Wattmeter is really only measuring current. Current is related to power, of course, assuming the impedance is exactly 50 Ohms, or whatever original specs might be.

John S.

*Politics is the gentle art of getting votes from the poor and campaign funds from the rich, by promising to protect each from the other.
*~Oscar Ameringer~

On Fri, Jun 30, 2017 at 11:55 AM, Steve Tuzeneu <stuzeneu@gmail.com> wrote:
Hey Guys:

I'm looking for your thoughts about how often you get your Bird (in line) watt meter calibrated at your transmitter site(s).

The factory says they recommend sending in the meter once a year for calibration.  We don't do it quite that often, but I don't want to say until I read your thoughts.

How long do you wait before sending yours in for calibration? And why?


Steve Tuzeneu,  CBT 
Network Staff Engineer
BBN Radio Network
P.O. Box 7300
Charlotte , NC 28241-7300 
704-523-5555 Extension 138
Member: Society of Broadcast Engineers
G.R.O.L./N1XXE-Extra Class Operator

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