PEAKMETER PM7221 User manual

1. Announcement. .................................................................................................
1.1 Safety statement .......................................................................................
1.2 Safety information ....................................................................................
2. General information .......................................................................................
2.1Description of the meter's panel ...........................................................
2.2LCD screen.....................................................................................................
3.Operating instructions ....................................................................................
3.1Auto shutdown ...........................................................................................
3.2DC voltage measurement .......................................................................
3.3DC voltage output ....................................................................................
3.4DC measurement (milliampere) ...........................................................
3.5DC measurement (milliampere)with loop power supply ..............
3.6DC output(milliampere)with loop power supply ............................
3.7DC (milliampere) analog output with Ma analog output
current .........................................................................................................
4.Technical parameters .......................................................................................
4.1DC voltage measurement/output .......................................................
4.2DC current input/output .......................................................................
4.3Circuit power ...............................................................................................
5.General specification ......................................................................................
6.Maintenance .....................................................................................................
6.1Cleaning .......................................................................................................
6.2Calibration ....................................................................................................
6.3Battery replacement .................................................................................
6.4Fuse replacement .......................................................................................
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Contents PM7221

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1. Statement
Unless otherwise permitted and agreed in writing, no part of
this Operation Manual shall be copied in any forms (including
storing and retrieving this manual or translating it into any other
languages) in accordance with International Copyright Law. This
Operation Manual is subject to change without notice from time
to time in its future versions.
The symbol "Caution" implies that the current condition and
operation may damage the meter or equipment.
It requires the operator to operate the meter or device with
great care. Any misoperation or any inconformity with these
operational steps may lead to the damaged meter or equipment.
The operator shall not continue to implement any operations
indicated by the symbol "Caution" if he fails to meet all these
conditions or understand fully the operational guidelines.
1.1 Safety statement
Caution
The symbol "Warning" implies that the current condition and
operation will place the operator in danger.
It requires the operator to operate the meter or device with
great care. Any misoperation or any inconformity with these
operational steps may lead to personal injuries or deaths. The
operator shall not continue to implement any operations
indicated by the symbol "Warning" if he fails to meet all these
conditions or understand fully the operational guidelines.
Warning
Please read carefully this Operation Manual and pay attention to warning
information before operating this meter.

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To avoid electric shock or personal injury, please operate this
meter in strict accordance with the Operation Manual.
This meter can only be installed and operated by qualified
specialists in accordance with the safety precautions and regulations
and the required technical specifications. At the same time, the use
of this meter requires stringent compliance with all laws and safety
regulations for specific applications. Bear in mind that some parts
of electrical equipment may carry hazardous voltages when the
equipment is in operation. Ignorance of any warnings can result in
serious personal injuries and damage to the equipment.
"Qualified person" refers to the one who is familiar with the
meter's configuration, installation, startup and operation and has the
required qualifications to implement the aforesaid work.
1.2 Safety information
Warning:
Do not attempt to input the voltage of more than 30V between
any two input terminals.
The meter is prohibited from being used in the vicinity of any
explosive gas, vapor or dust.
Don't attempt a measurement when the battery cover is left open.
Do not attempt a measurement in any of abnormal conditions,
including the circumstances when the meter is damaged or the
metal parts of the meter or measurement lines are exposed.
Do not mount replacement parts on the meter or modify the meter.
Return the meter to local dealer for repair when it is damaged.
Warning:
Please remove the batteries and put them away when they are left
idle or preserved.

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Do not attempt cleaning with abrasives or solvents. Instead,
you may use a mild detergent or a damp cloth.
Confirm that the testing terminals to be used, functions
and measuring ranges are correct, when using the
meter for measurement or output.
Voltage current signal source (Volt/mA Calibrator) is a Volt/mA
source and measuring tool used in tests on 0-24 milliampere
current circuit and 10 V DC voltage. This calibrator can not be
used for measurement and output simultaneously.
2. General information
Measurement/output 0-100mV
0-10VMeasurement/output V
0 to 24 mA (-25% to 125%)Measuring output mA/ (% of span)
24 V DCLoop power

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2.1 Description of the meter's panel
V/mV mA%
INPU T
OUTPUT
mA
VOLT/m A CALIBR ATOR
COM
V
INPUT OUTPUT COLD LOW HIGH IEX
T Y PE J K T E R S B N L U C B P X K G D PM 2 W3 W4 W
Ni120 Pt1000 Pt200 Pt500 385 392 Cu100 Cu50 YSI400
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7 8
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1
2
3
4
Display screen
V, mV switchover key
Power key
Integer digit up key
Decimal digit up key
LOOP jack
mA jack
5
6
7
8
9
10
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COM jack
V Jack
Integer digit down key
Decimal digit down key
Measurement/output
switchover key
mA/mA% switchover key
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1
6
7
2 3 4 5
INPUT OUTPUT
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2
3
4
Negative sign
Auto power off indicator
Measurement status
indicator
Output status indicator
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6
7
Battery Low indicator
Data display area
Displayed unit
2.2 LCD screen
3. Operating instructions
3.1 Auto shutdown
When the meter is left idle for five minutes, the meter will
automatically be shut down to extend the batteries' service life.
To disenable auto power off function, please follow the steps
below:
1.When the meter is powered off, press the key and hold it,
then press the key to start up. When the meter has been
started up, release the press on the key and then on the key
INP UT
OUTPUT
INP UT
OUTPUT

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3.2 DC voltage measurement
1. Power on the meter.
2.Press the key to switch to measurement status and the
word "INPUT" will appear on the display screen.
3.Press the key in accordance with the measuring range
and switch to "V" or "mV" measuring range.
V/mV
2.The auto power off indication on the display screen will
disappear.
3.The reboot after shutdown will resume the function of auto
power off, and the auto power off indication will appear on the
display screen.
V/mV mA%
INPUT
OUTPUT
mA
VOLT/mA CAL IBR ATOR
COM
V
V
INPUT
INP UT
OUTPUT

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4.Connect test lines as shown in the figure on the right hand.
5. Capture measurement results on the display screen.
1.Power on the meter.
2.Press the key to switch to output status and the word
"OUTPUT" will appear on the display screen.
3.Press the key in accordance with the measuring range
and switch to "V" or "mV" measuring range.
4. Connect test lines as shown in the figure on the right hand.
5. Press the key "Data Adjustment" and adjust the displayed
value in accordance with the voltage value desired to be output.
6. Output voltage of the meter
3.3 DC voltage output
INPUT
OUTPUT
V/mV
V/mV mA %
INPUT
OUTPUT
mA
VOLT/mA CAL IBRATOR
COM
V
INPUT
V+V-

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3.4 DC measurement (milliampere)
When external power is supplied to the circuit to be measured,
please choose this method to measure current.
1. Power on the meter.
2.Press the key to switch to measurement status and the
word "INPUT" will appear on the display screen.
3.Press the key in accordance with the measuring range
and switch to "MA" or "mA%" measuring range.
4.Connect test lines as shown in the figure on the right hand.
5.Capture measurement results on the display screen.
INPU T
OUTPUT
mA%
V/mV m A%
INP UT
OUTPUT
mA
VOLT/mA CALI BRATOR
COM
V
INPUT
+A -
When no power is supplied to the circuit to be measured, let the
meter provide loop power supply. Select this mode to measure
current.
1.Power on the meter.
3.5 DC measurement (milliampere) with loop power
supply

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2.Press the key to switch to measurement status and the word
"INPUT" will appear on the display screen.
3.Press the key in accordance with the measuring range and
switch to "MA" or "mA%" measuring range.
4.Connect test lines as shown in the figure on the right hand.
5. Capture measurement results on the display screen.
INP UT
OUTPUT
mA%
V/mV m A%
INP UT
OUTPUT
mA
VOLT/mA CALI BRATOR
COM
V
INPUT
-
Measured
circuit
+
The calibrator can provide current output in accordance with
milliampere value or percentage displayed. Percentage range is
from -25.00 to 125.00%. 0% corresponds to 4 milliampere and
100% 20 milliampere. In the current source mode, the calibrator
provides current. In the analog mode, the calibrator simulates a
group of two-wire transmitters using external current loop.
3.6 DC output (milliampere) with loop power supply

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V/mV mA%
INPU T
OUTPUT
mA
VOLT/m A CALIBR ATOR
COM
V
INPUT
+ -
1.Power on the meter.
2.Press the key to switch to output status and the word
"OUTPUT" will appear on the display screen.
3.Press the key in accordance with the measuring range and
switch to "MA" or "mA%" measuring range.
4.Connect test lines as shown in the figure on the right hand.
5.Press the key "Data Adjustment " and adjust the displayed value
in accordance with the voltage value desired to be output.
6.Output current.
INP UT
OUTPUT
mA%

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3.7 DC (milliampere) analog output with Ma
analog output current
If the external loop power of 24 to 30V is used, current analog
mode shall be used.
1. Power on the meter.
2.Press the key to switch to output status and the word
"OUTPUT" will appear on the display screen.
3.Press the key in accordance with the measuring range and
switch to "MA" or "mA%" measuring range.
4.Connect test lines as shown in the figure on the right hand.
5.Press the key "Data Adjustment" and adjust the displayed value
in accordance with the voltage value desired to be output.
6.Output current.
INPUT
OUTPUT
mA%
V/mV mA%
INP UT
OUTPUT
mA
VOLT/mA CAL IBRATOR
COM
V
INPUT
The power su pply
is highest 300V
- -
+ +

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4.Technical parameters
Accuracy: ± (% reading+ digit) Ambient temperature: 18℃～28℃
Relative humidity: 80%.
4.1DC voltage measurement/output
Precision ± (% reading + digit)Measuring range
100 mV
10 V
Resolution
0.01 mV
0.001 V
0.02 % + 2
0.02 % + 2
Input resistance: 1MΩ (nominal value),< 100pF
Over-voltage protection: 30 V
Voltage driver capacity: 1 mA
4.2 DC current input/output
Precision ± (% reading + digit)Measuring range Resolution
Overload protection: 250 mA,250V fast-acting fuse
Percentage: 0%=4mA, 100%=20mA
Analog mode: the nominal value of external loop voltage is 24V.
The value of external loop voltage ranges from 12V to 30V.
24 mA 0.001mA 0.015 % + 4
4.3 Circuit power
24V±10%
5. General specification
The maximum voltage imposed between any input terminal and the
ground or between two input terminals: 30V
Storage temperature:-40 ℃ to 60 ℃
Operating temperature:-10 ° c to 55° c

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Operating altitude: up to 2000 m
Temperature coefficient: -10℃ to 18 ℃ and 28 ℃ to 55℃; measuring
range ±0.005 %/℃
Relative humidity: 95% ( up to 30℃), 75% (up to 40℃), 45% (up to
50℃), and 35% (up to 55℃)
Power requirements: 4X1.5V AA batteries
Dimensions: 194mm X 94mm X 54mm
Weight: 360g (exclusive of batteries)
6.1 Cleaning
Regularly clean housing with a damp cloth and any of detergents
rather than corrosives or solvents.
6. Maintenance
6.2 Calibration
Th e calibrator needs to be calibrated ann ually to maintain its
compliance with performance specification.
6.3 Battery replacement
To avoid electric shock or personal injury as a result of
incorrect reading, promptly replace the battery when the
battery low indicator appears.
Before replacing batteries, turn off the meter, unscrew the bolts at
the back of battery cover and remove battery cover. Fuse replacement
Warning

6.4 Fuse replacement
To avoid personal injury or damage to the calibrator, you must
use the 125mA/250V fast-acting fuse.
Voltage current signal source Operation Manual Before replacing
fuse, turn off the meter, unscrew the bolts at the back of battery cover
and remove battery cover.
Warning
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