PR8111、PR8112_user_manual_eng_20191015H.pdf - 第15页

1.2 Names and Functions of Parts 12 This fe ature is no t usually us ed. Per form sp an adju stme nt duri ng cali brati on, wh en you wish to pr ecisel y realig n the sp an (recording paper wid th) to compen sate for t h…

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1.2 Names and Functions of Parts
11
1
RANGE knob
Selects the measurement range, allowing
you to choose the range that best suits
the voltage being measured. The 500 set-
ting is used exclusively for mV ranges.
mV/V switch
Selects the unit for the measurement
range selected with the RANGE knob.
POSITION knob
Adjusts the pen’s zero point (0 V position)
by moving its position. When the ZERO/
MEAS switch is in the ZERO position, the
pen can be moved throughout the entire
effective recording width.
ZERO/MEAS switch
• MEAS: Use when measuring data. (You can start recording by placing
the START/STOP/FEED switch in the START position.)
• ZERO: Use when adjusting the pen’s zero point.
(You can move the position with the POSITION knob.)
CHART SPEED knob
Selects the chart speed, allowing you to
change the speed at which the recording
paper is fed through the instrument.
Operating Panel
h/min switch
Selects the unit for the speed set with the CHART SPEED
knob. You can select either minutes (min) or hours (h).
(Example: PR8112)
START/STOP/FEED
switch
Starts and stops the paper feed.
• START: Starts feeding paper through
the instrument.
• STOP: Stops feeding paper through
the instrument.
• FEED (by pushing the switch past
STOP): Feeds paper through the
instrument. There are four feed
speeds. You can increase the feed
speed by pressing and holding the
switch in the FEED position for at
least 2 seconds.
SPAN (p. 12)
Allows the recording width to be adjusted
using a screwdriver. This adjustment is
not usually used during normal operation.
Use as necessary when adjusting the in-
strument, for example during calibration.
• To increase the width: Turn clockwise.
(The recording width can be
increased by a maximum of about
20%.)
• To decrease the width: Turn counter-
clockwise. (The recording width can
be decreased by a maximum of about
20%.)
AC adapter terminal (p. 18)
Connect the included AC adapter here.
Battery bay and cover (p. 17)
When using batteries to power the instrument, load six
LR20 alkaline batteries here. Since the battery cover is
held in place with screws (M3), a Phillips head screw-
driver is required in order to change the batteries.
FG terminal
Use this terminal, which is connected to the instrument’s
metal chassis, to ground the chassis. For best grounding,
use a cable of 3 m or less in length.
Rear Panel
CH2 POWER switch (p. 26)
Use this switch (available only on the PR8112 [2-pen
model]) to turn CH2 (pen 2) off. Turning off CH2 lowers
the instrument’s power consumption when using only one
channel.
(Example: PR8112)
Input terminals (p. 20)
Connect the measurement cables here.
Red: Connect the cable carrying the high signal.
Black: Connect the cable carrying the low signal.
On the PR8112, the upper two terminals are CH1,
and the lower two terminals are CH2.
The PR8111 has only the upper two terminals.
1.2 Names and Functions of Parts
12
This feature is not usually used.
Perform span adjustment during calibration, when you wish to precisely realign the span
(recording paper width) to compensate for the expansion and contraction of the recording
paper, or when you wish to vary the span for other reasons.
The recording width can be adjusted with a precision slotted screwdriver.
As shown below, the chart cover can be opened up to the line indicated by the label.
Do not attempt to push the chart cover beyond the line as doing so may damage it.
SPAN (span adjustment)
• To increase the width: Turn clockwise.
(The recording width can be increased up to 20%.)
• To decrease the width: Turn counterclockwise.
(The recording width can be decreased up to 20%.)
Adjusting the span causes values to diverge from the calibrated values guaranteed by HIOKI.
After making measurements following span adjustment, have HIOKI or your nearest distribu-
tor recalibrate the instrument.
Chart cover
2.1 Pre-Operation Inspection
13
1
Measurement
Preparations Chapter 2
2.1 Pre-Operation Inspection
If you find any damage, have the instrument
repaired.
Yes
Is there any visible damage to the instru-
ment?
Instrument Inspection
When turning on the instrument
Did the power supply LED (green) light up?
No
2
The power cord may be broken, or the in-
strument may be experiencing an internal
malfunction. Have the instrument repaired.
If using batteries to power the instrument,
the batteries may be dead, or there may be
no batteries in the instrument.
• If the orange LED is on: Have new bat-
teries ready to use.
• If the red LED is on: Replace the batter-
ies with new batteries.
No
Yes
End of inspection
Be sure to read "Operating Precautions" (p. 5) before using the instrument.