MODEL PH-35 PEAK-HOLD MODULE
and MODEL 215-35 PEAK-HOLD METER
GENERAl, I)ESCItlPTION
The Pll-35 Peak-Ilald Module is zm attach-
ment to the 215 Sound Level Meter (hecoming
the Model 215-35 I'eak-Iiold Meter) for the mea-
surement of peak sound levels. It is connected to
the 215 in the same manner ns tile OH-d5 Octave
Band Filter. The PII-35 has three nlodes or opl_ra-
tion: FAST liESPONSE peak.hold, IEC lhI-
PULSI_ hokl, or IMPACT peak-hold, sele(:tahle I)y
n three position switch. In the FAST response I)O.
sitlon, tile meter will hold the highest rills ronditlg
attltined i}y the sound level meter in tile llOl'nllil
FAST response mode, This mode is gellernlly used
for nllplieations such as vehicle I_ass-hy and idr-
ernt't fly.over measurements. In the IF,C IMPULSE
position, the meter will hold the n_nximum rms Figure 13. PH-35
level for any impulse with risetime lls defined I)y Pe_k-H01d Module
the Intermltional Iglectrotechnieal Commission lEO R-179_.. In the
IMPACT position the meier measures and holds the true peIlk {)[ Iln.'_'
sottnd I)rescntod to the nlierophone. This n_ocIe is ])rinlitri]y l'or
OSllA impact linlitlltion nleasurements (linear sclde), The imit fea-
tul'es high resolution readings with it 10dl] oyer-rflnge button oll[l-
hling the operator to retld levels I0d13 hi)or(! [till scale.
SPECI F'ICATIONS
When used with the 215 Sound Level I_letl,r, the peak-hold
meter meets all reqtdreml_nts of ANSI S].,t-1971 type 2, Range
selection mid controls are set hy tile 215 Satmcl Lev(!l Meter.
lapel Voltage: 0 to -+ 6v peak from 215 Sound I.ev[d _leter.
Pcak-IIold I_.tlllge: 30 tl) 1,16dB as selected hy the 215 Satlnd
Level Meter.
Modes: 1) I.'AST response nl;ixinlLinl hold
2) IEC II_IPUI.SI'] hold
3) IM I_.CT {l)ealO hold
ltise'I'ime: *Fz_.STliesponseMode: 125milliseconds
IEC II_IPULSI'_ Mode: 35 milliseconds
OSIIA IMPACT iModc: h_ssthltn 50 tl seconds
[Iold,Deeay ltale: less than .01dB/seeond (all modes)
Power Sourer,: OI)tllins ± 9v frOlllJlttttel'ies located in 215 Illl_tel"
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