Philips PM2528 Operating Manual page 57

57
For input signals with high slew-rates, such as pulses, the peak value has to be present over at least ms,
In case of a periodic signal this time may be split up as shown in fig. 22.
1 12 ti#t? Bims
a 7 MEASURING TIME a
START STOP,
Fig, 22. Measuring the peak value of pulses.
Sine-waves and triangular-waves up to 100kHz can be measured with full accuracy.
Operation
— Select function V* ,Vy or V ¢
Vio Peg 1 x press Vpeak
Mig tes ot 2 x press Vpeak
vig: 3 x press Vpeak
— Select the correct range or the AUTO ranging mode.
— Select the HIGH RES mode or the normal mode.
— Select a start mode by pressing:
INT measurements are started continuously repetitive.
MAN a measurement can be started by pressing MAN.
In the V ¢ function a measurement stops at the end of a measuring cycle (400ms approx.)
In the V * and V v function, a measurement can only be stopped by pressing MAN again.
In the V * and V v function, the LED in the MAN push-button blinks during a
measurement.
EXT a measurement is started via the EXT START input or one of the interfaces
PM9291 (IEC-bus) or PM9292 (BCD parallel) .
in the V ¢ function a measurement stops at the end of a measuring cycle (400ms approx.)
in the V * and V v function a measurement can be stopped via the EXT START input or
'one of the interfaces ("stop" command). During a measurement in the V * and Vy
function the LED in the EXT push-button blinks. The minimum time between a
start command and a "stap'' command is 400ms.
— Connect the input signa! to the 0 and V-Q socket.
Remarks
© For Vpeak measurements the optional plug-in card PM9259 must be installed in the PM2528.
© When the display shows dashes (e.g. — — V} press START INT or MAN.
© In the tabie below, the ranges, ranging limits and scale lengths are represented.
@ At MAN and EXT START in the V * and Vy mode, 2 measurement is stopped at overload.