GW Instek gpm-8212 User manual

POWER METER USER MANUAL
2
TABLE OF CONTENTS
PAGE
1. SAFETYSUMMARY……………………………………………..
1
2. INTRODUCTION…………………………………………………
5
3. SPECIFICATION…………………………………………………
6
4. PANEL INTRODUCTION & WIRING…………………………
8
5. USAGE DESCRIPTION………………………………………….
16
6. RS232 COMMUNICATION INTERFACE……………………...
18
7. MAINTENANCE…………………………………………………. 21

POWER METER USER MANUAL
1
1.SAFETY TERMS AND SYMBOLS
Please take a moment to review these safety terms and symbols which
may appear in this manual or on Equipment to prevent damage to the
Power Meter.
WARNING. Warning statements identify condition or
practices that could result in injury or loss of life.
CAUTION. Caution statements identify conditions or
practices that could result in damage to this product or
other property.
POWER METER USER MANUAL
2
DANGER High Voltage
ATTENTION refer to Manual
Protective Conductor Terminal
(ground) Earth Terminal
Frame or Chassis Terminal

POWER METER USER MANUAL
3
FOR UNITED KINGDOM ONLY
NOTE: This lead/appliance must only be wired by competent
persons
WARNING: THIS APPLIANCE MUST BE EARTHED
IMPORTANT: The wires in this lead are coloured in
accordance with the following code:
Green/ Yellow: Earth
Blue: Neutral
Brown: Live(Phase)
As the colours of the wires in main leads may not correspond
with the colours marking identified in your plug/appliance,
proceed as follows:
The wire which is coloured Green & Yellow must be connected to
the Earth terminal marked with the letter E or by the earth symbol
or coloured Green or Green & Yellow.
The wire which is coloured Blue must be connected to the
terminal which is marked with the letter N or coloured Blue or
POWER METER USER MANUAL
4
Black.
The wire which is coloured Brown must be connected to the
terminal marked with the letter L or P orcoloured Brown or Red.
If in doubt, consult the instructions provided with the equipment
or contact the supplier.
This cable/appliance should be protected by a suitably rated and
approved HBC mains fuse : refer to the rating information on the
equipment and/or user instructions for details. As a guide, cable
of 0.75mm²should be protected by a 3A or 5A fuse. Larger
conductors would normally require 13A types, depending on the
connection method used.
Any moulded mains connector that requires removal
/replacement must be destroyed by removal of any fuse & fuse
carrier and disposed of immediately, as a plug with bared wires is
hazardous if a engaged in live socket. Any re -wiring must be
carried out in accordance with the information detailed on this
label.

POWER METER USER MANUAL
19
lCommunication command
COMMAND DESCRIPTION EXAMPLE
F00 Data hold enable
F01 Data hold disable
F02 Set in maximumstatus
F03 Set in minimum status
F04 Set in normal status
R00 V Range=640.0V
R01 V Range=320.0V
R02 V Range=160.0V
R03 V Range=80.00V
R04 V Range=40.00V
R05 V Range=20.00V
R06 V Range=10.00V
R07 V Range=5.000V
R08 A Range=20.48A
R09 A Range=10.24A
R10 A Range=5.120A
R11 A Range=2.560A
R12 A Range=1.280A
R13 A Range=640.0mA
R14 A Range=320.0mA
R15 A Range=160.0mA
R16 V Range=Autorange
R17 A Range=Autorange
S00 Set Voltage Ratio(PT) S00:1
S01 Set Current Ratio(CT) S01:1
V00 Read Voltage
V01 Read Current
V02 Read Watt
V03 Read PF
V04 Read Hz
POWER METER USER MANUAL
20
lDEMO Program
; Demo program language: BASIC
; Computer set Baudrate equal 9600, and use COM2
; The GPM-8212 set Baudrate equal 9600
; Command define in CMD$
10CMD$= “V00”
20VALUE$= “ ”
30OPEN “COM2:9600,N,8,,CS,DS,CD” FOR RANDOM AS#2 LEN=1
40FOR I= 1 TO 100
50PRINT #2, CMD$
60INPUT #2, VALUE$
70PRINT VALUE$
80NEXTI
90CLOSE #2
100END

POWER METER USER MANUAL
21
7. MAINTENANCE
The following instructions are used by qualified person only to avoid
electrical shock, do not perform any service other than contained in the
operation instructions unless you are qualified to do so.
7-1.Fuse Rating and type
If the fuse is ruptured, the Power METER will not operate. Try to
determine and correct the cause of the blown fuse, then replace the fuse with
correct rating and type shown as below:
FUSE Rating and Type Rating Input
MODEL 115V/230V Watts
VA
GPM-8212 T0.5A 250V 22 28
WARNING: For continued fire protection, replace only with
250V fuse of the specified type and rating, and disconnect the
power cord before proceeding fuse replacement.
POWER METER USER MANUAL
22
7-2.Fuse Replacement Procedure
When you proceed calibration or maintenance of the Power Meter, if you
want to replace the fuse, the upper cover must be removed according to the
following steps:
1).The handle must be turned downward 90 degrees first.

POWER METER USER MANUAL
23
2).Pull apart the handle from the Power Meter. Please turn the handle left and
right side slightly, that will make it easier to pull off the handle.
3).There are two washers inside of two holes (the joints of handle and case)
respectively. Please use a screwdriver to pry open these washers.
POWER METER USER MANUAL
24
4).Please use a screwdriver to open the screw located at upper side of rear panel.
Therefore, the upper cover can pull toward the backside. In the meantime,
the upper cover is moved.
Note: If you want to install the upper cover, please reverse above steps.
7-3. Cleaning
To keep the instrument clean, wipe the case with a damp cloth and detergent. Do
not use abrasives or solvents.