Extech Instruments PQ3470-2 User manual

User Guide
3-Phase Power and Harmonics Analyzer / Datalogger
MODEL PQ3470
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Table of Contents
1.0 INTRODUCTION
1-1
Features.................................................................................................. 3
1-2 Safety.......................................................................................................4
2.0 SPECIFICATIONS
2-1
General Specifications ................................................................................. 5
2-2 Electrical Specifications....................................................................................6
3.0 METER DESCRIPTION............................................................. .8
4.0 METER BASICS AND THE SETUP MODE
4-1
Initialization Screen ...................................................................................................... 10
4-2 Measurement Screen Example .......................................................................... 10
4-3 Keypad Summary................................................................................................. 11
4-4 Setup Mode Basics...................................................................................................... 12
4-5 Setup Mode In Detail......................................................................................... 14
5.0 POWER MEASUREMENT PROCEDURES
5-1
1Φ2W (single phase two wire) measurement .......................................... .21
5-2 1Φ3W (single phase three wire) measurement........................................ .22
5-3 3Φ3W (three phase three wire) measurement ......................................... .23
5-4 3Φ4W (three phase four wire) measurement ........................................... .24
5-5 CT and PT measurement .......................................................................................... .25
5-6 Zero Adjust for Watt Hour Measurement ................................................................ .26
5-7 Harmonics function Measurement ........................................................................... .26
5-8 Graphic Phasor Measurement ................................................................................. .28
5-9 Voltage / Current Waveform...................................................................................... .29
5-10 Transient Capture (Dips, Swells, Outage) ............................................................ .30
5-11 Data Logger ..................................................................................................................... 31
5-12 Data Hold ......................................................................................................32
5-13 Display Backlight key....................................................................................32
5-14 LOWBAT (Low Battery) screen ...................................................................32
5-15 Measurement Definitions.................................................................................. .33
5-16 Reset Button....................................................................................................... .33
6.0 MAINTENANCE
6-1
Cleaning ................................................................................................................. 34
6-2 Battery Replacement............................................................................................ 34
7.0 SD Card
7-1
Download Data from SD Card ......................................................... 35
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1.0 Introduction
Congratulations on your purchase of the Model PQ3470 Power Analyzer. This instrument is fully
tested and calibrated prior to delivery; proper use and care of this meter will provide years of reliable
service.
1.1 Features
Large dot-matrix, numerical, backlit LCD
Full system analysis with up to 35 parameters:
oVoltage (phase-to-phase) and Voltage (phase-to-ground)
oCurrent (Amps) phase-to-ground
oKW / KVA / KVAR / PF (phase)
oKW / KVA / KVAR / PF (system)
oKWH / KVAH / KVARH / PFH (system)
oPhase angle
oHarmonics
600.0VAC input with CAT III-600V safety rating
Adjustable Current Transformer (CT) and Potential Transformer (PT) ratio for high power
distribution systems
Log up to 30,000 reading on removable SD memory card in Excel® format
Wide sampling rate range (from 2 seconds up to 2 hours)
Captured measurements imported directly into ExcelTM via SD memory card
Easy-to-use onscreen menu
Easy-to-hold rugged over-molded housing
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1.2 Safety
CAUTION: Risk of electric shock. Do not attempt to open or disassemble the meter while
taking measurements
CAUTION: Do not attempt to measure Voltage or Current that exceeds specified limits
Do not operate this instrument in wet or dusty environments.
Do not operate this instrument in the presence of combustible or explosive gas
Do not touch exposed metal parts or unused terminals.
Consider the use of rubber gloves in operation.
Do not operate in excess of AC 500V (Phase to Neutral), or AC 600V (Phase to Phase)
Do not operate this instrument if it appears to be malfunctioning
Remove the test leads from the meter before opening the battery compartment cover
When cleaning, use only a dry cloth to wipe the meter housing. Do not use liquids of any
kind to clean the meter
Safety Symbols:
CAUTION DOUBLE INSULATION RISK OF ELECTRIC SHOCK
Environmental Conditions
Installation Category III 600V
Pollution Degree 2
Altitude limit: 2000m
Indoor use only
Relative Humidity maximum: 80%
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2.0 Specifications
2.1 General Specifications
Circuit Custom single-chip microprocessor LSI circuit
Display
LCD Size: 81.4 X 61 mm (3.2 X 2.4”)
Dot Matrix backlit LCD (320 X 240 pixels)
Measurements V (voltage phase to phase)
V (voltage phase to ground)
A (Current Phase to ground)
KW / KVA/ KVAR / PF (Phase)
KW / KVA/ KVAR / PF (System)
Power factor
Phase angle
Frequency
Harmonics
Wire configurations 1P/2W, 1P/3W, 3P/3W, 3P/4W
Voltage ranges 10 ACV to 600 ACV (Auto Range)
Current ranges Current probe input signal voltage (ACV):
200mV /300mV /500mV /1V /2V /3V
Current probe input current range (ACA):
20A/200A/2000A (1200A)/30A/300A/3000A/60A/600A/6000A
Note that the meter has universal probe compatibility
Safety standard IEC1010 CAT III 600 V
ACV input impedance 10M ohms
Range select ACV Auto Range
ACA Manual Range
Clamp frequency response 40 Hz to 1 KHz
Tested clamp frequency 45 to 65 Hz
Over-load protection ACV 720 ACV RMS
Over-range
"OL" is displayed; ACV
Data on SD card will read ‘9999’ or ‘999’ for over-range data
Under-range "UR" is displayed
Data Hold Freezes displayed reading
Data Recording SD memory card
SD Card capacity 2G SD max. / 16G SDHC max.
Sampling Time Approx. 1 second (LCD) / 2000 samples per period
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Datalogger
Real time data logger saves data to SD memory card for download to
PC (data files open directly to spreadsheet)
Sampling rate: From 2 seconds to 7200 seconds
Max. file capacity: 30,000 records
Data Output Serial or USB connection (cable supplied)
Operating Temperature 0 to 50
o
C (32 to 122
o
F)
Operating Relative Humidity 80% Relative Humidity max.
Power Supply Eight (8) ‘AA’ 1.5VDC batteries or AC 9V power adapter
Power Consumption Meter: 270 mA DC; Clamp: 22 mA DC
Max. Conductor size Clamp can accommodate up to 50 mm (2.0”) diameter
Weight Meter: 1010g (2.2 lbs.) (with batteries); Clamp: 500g (1.1lbs)
Dimensions Meter: 225 X 125 X 64 mm (8.86 X 4.92 X 2.52“)
Optional Clamp: 210 X 64 X 33mm (8.3 X 2.5 X 1.3”)
Optional Clamp Jaw: 86 mm (3.4”) Outer diameter
Accessories Included Instruction manual
Batteries
SD card (4G)
2.2 Electrical Specifications (45 to 65Hz; 23±5°C)
Function Range Resolution Accuracy*
AC Voltage 10.0V to 600.0V 0.1V ± (0.5% range + 3 digits)
AC Voltage
(peak to peak) 28.2V to 1.697kV 0.1V to 1V ± (0.5% range + 30 digits)
AC Current (trms) 0.2A to 6000A 0.001A to 1 A ± (0.5% range + 5 digits)*
AC Current
(peak to peak) 2.828A to 16.97kA 0.001A to 10 A ± (0.5% range + 30 digits)*
Power Factor 0.00 to 1.00 0.01 ± 0.04
ΦPhase Angle -180° to 180° 0.1° ± 1°*
Frequency 45 to 65Hz 0.1Hz 0.1Hz
Power 0.0 to 3.6MW
0.001k to 0.001M ± (1% range+8 digits)*
0.0 to 3.6MVA
0.0 to 3.6MVAR
Watt-Hour 0.0 to 3.6MWH
0.001k to 0.001M ± (1% range+8 digits)*
0.0 to 3.6MVAH
0.0 to 3.6MVARH
*Meter accuracy only. For system accuracy add the accuracy of the clamp used.
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Harmonics Magnitude
(>5%, 50/60Hz) Range Resolution Accuracy
ACV 1 to 20th
0.1V
± (2% + 5 digits)
21 to 30th ± (4% + 5 digits)
31 to 50th Reference only
ACA 1 to 20th
0.001A to 1A
± (2% + 5 digits)*
21 to 30th ± (4% + 5 digits)*
31 to 50th Reference only
Harmonics Magnitude
(>5%, 50/60Hz) Range Resolution Accuracy
ACV 1 to 20th
0.1%
± (2% + 10 digits)
21 to 30th ± (4% + 20 digits)
31 to 50th Reference only
ACA 1 to 20th
0.1%
± (2% + 10 digits)*
21 to 30th ± (4% + 20 digits)*
31 to 50th Reference only
Crest Factor
(CFV or CFA) 1.000 to 9.999 0.001 ± (5% + 0.3)
Total Harmonic
Distortion (THD) 0 to 20% 0.1% ± (2% + 5 digits)
20.1 to 100% ± (6% + 10 digits)
Phase angle 1 to 50th 0.1° ± 2°
*Meter accuracy only. System accuracy includes the accuracy of the clamp used.
PFH: Long Term Power Factor
PF∑:
For 3ɸ4W, 3 ɸ3W, 1 ɸ3W: PF∑= p∑/ S∑
For 1ɸ2W: PF1 = P1/S1
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3.0 Meter Description
Meter Front, Top, and Right Side
3-1
LCD Display
3-2 Keypad (broken out below)
3-3 Measurement input terminals
3-4 SD CARD slot, RS232 jack,
AC adaptor jack, Reset button (broken out below)
3-5 Clamp Power Output jacks (broken out below)
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Keypad Description
3-6
Display Backlight ON-OFF
3-7 Power ON-OFF
3-8 Exit (programming)
3-9 REC datalogger memory
3-10 Volt/Amp range
3-11 Shift (programming)
3-12 Setup / Enter
3-13 HOLD (freeze display)
3-14 Transient display
3-15 V/A Waveform display
3-16 Phasor display
3-17 Power Measurement
3-18 ▲ up arrow navigation
3-19 ▼down arrow navigation
3-20 ◄ left arrow navigation
3-21 ► right arrow navigation
3-22 Phase / Wire setup
3-23 Harmonics display
3-24 Harmonics Analysis display
3-25 3-26
3-28
3-27
3-29
Meter Right Side
3-25
9V power adaptor jack
3-26 SD memory card socket
3-27 RS232 PC interface socket
3-28 Reset button
3-29 Screw fastener for protective cap
Meter Top
3-30
Clamp positive input jacks
3-31 Clamp negative input jacks
3-32 Clamp power lead connections
Note: The Battery compartment and Tilt Stand are located on the rear of the instrument
3-6
3-7
3-8
3-9
3-10
3-11
3-12
3-13
3-18
3-19
3-20
3-21
3-16 3-15 3-143-17
3-22
3-23 3-24
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4.0 Meter Basics and Setup Mode
4-1 Initialization Screen
1. When the meter is switched ON the initialization screen appears (see Fig. 4-1 below).
Figure 4-1: Start-up Initialization Screen
2. The meter will also check for an inserted SD memory card. ‘SD check’ will appear on the lower
right side of the display. If an SD card is inserted, the blinking display will switch off after several
seconds. When no card is inserted the display will show ‘No disk’.
4-2 Measurement Screens
After the initialization screen, the meter then displays one of the measurement screen
configurations. The meter reverts to the screen that was displayed at the last power down and may
not be the screen shown below. Other screen configurations are shown later in this User Guide.
Measurement Screen Example
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4.3 Keypad Summary
POWER : Press and hold to power ON/OFF
1Φ3Φ(phase/wire) : Select (1P/2W, 1P/3W, 3P/3W, 3P/4W) measurement functions
REC : Data record key for the SD Memory Card
HOLD: Freeze the displayed reading
BACKLIGHT : Switch LCD backlight ON/OFF
SETUP/ENTER : Enter the Setup mode. Also used as an Enter key to confirm entries
EXIT : Exit a screen when programming
SHIFT: Programming key for use in the Setup Mode
Up arrow ▲: Generally, press to move the cursor up or to change a parameter value, however
use varies with each particular function
Down arrow ▼: Generally, press to move the cursor down or to change a parameter value,
however use varies with each particular function
Left arrow ◄: Use varies according to a particular function
Right arrow ►: Use varies according to a particular function

Volt/Amp Range : Select a range for voltage or current harmonic measurements

Transient display : Capture transient measurements

V/A Waveform display : View waveform representations of voltage and current

Phase diagram : View measurements in vector display format

Power Reading : Display power measurements

Harmonics display : Display Harmonics

Harmonics Analysis : View the Harmonics analysis
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4.4 Setup Mode
4.4.1 Setup Mode Basics
1. Press the SETUP button to access the Setup Mode. The screen shown below will appear on
the meter’s LCD.
2. Use the up and down arrow keys to scroll through the parameters.
3. Press the SHIFT key to open a particular parameter for editing (the ‘SHIFT 1’ display icon will
be visible on the upper right hand corner of the LCD).
4. Once a parameter is opened for editing (parameter variable highlighted), use the up and
down arrow keys to change the variable.
5. When the SHIFT key is pressed on the FILE NAME parameter, the user can select the first
half of the file name which is the configuration (3P4, for example). When the SHIFT keys is
pressed again, the SHIFT 2 icon appears on the display and the user can select the second
half of the file name (10001.XLS, for example). See Figure 4-4b for an example of the SHIFT
2 screen. This applies only to the FILENAME parameter.
6. Press the SHIFT key to continue scrolling through the other parameters using the up and
down arrow keys.
7. Note that to enter the RS-232 parameter, scroll to the RS-232 OUT SEL parameter and press
the SETUP key to open the multi-page RS-232 output selection. Refer to the RS-232 section
of this guide for more detailed information.
8. To exit the Setup Mode press the EXIT key.
9. Detailed instructions for each parameter are provided in the next section.
Setup Mode Screen with SHIFT 1 icon
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Setup Mode Screen with SHIFT 2 icon
4.4.2 The Setup Mode Parameter Menu
Folder Name: Select a file name on the SD CARD; the range is WTA01 to WTA10
File Name: Set a file name on the SD CARD (50 filenames are permitted)
REC Date: Show a file’s date-time stamp (Year / Month / Date / Hour / Min / Sec)
Sampling Time: Set the datalogger sampling rate from 2 to 7200 seconds
Delete File: Delete an existing data file from the SD CARD
SD Format: Format the SD CARD
PT: Set the Potential Transformer ratio from 1 to 1000
CT: Set the Current Transformer ratio from 1 to 600
Audible Tone: Set the keypad beeper ON or OFF
Trans. Ref.: Set the Transient voltage reference
SDVP: Set the threshold for the Swells/Dips transient Voltage Potential in percent (0-100%)
Clamp Type: Select from the clamp type menu
A (Amps): Set the Current range
V (Volts): Set the Voltage range
RS232 Out Select: RS232 output function (up to nine items can be output); refer to the
RS232 section of the user guide for detailed information
Year: Set the current year
Month: Set the current month
Date: Set the current date
Hour: Set the current hour
Minute: Set the current minute
Second: Set the current second
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4.5 Setup Mode in Detail
Press SETUP to enter the Setup Mode, selected items will appear highlighted (reverse video). As
described in the Setup Mode Basics section above, use the up and down arrow keys to move
through the available parameters and use the Shift key to open a parameter for editing. Once a
parameter is opened for editing, the up and down arrow keys are used again to change a
parameter’s setting. The SHIFT key is then used to return to Setup Mode editing where the arrow
keys are used again for scrolling. Use the EXIT key to leave the Setup Mode.
4.5.1 Folder name: Set a Folder Name on the SD Memory Card
1. Scroll to the FOLDER NAME field using the up and down arrow keys if necessary
2. The Folder Name range is “WTA01” to “WTA10” (refer to Figure 4-5-1a below)
3. Press Shift to open the Folder Name parameter for editing
4. Use the arrow keys ▲▼to select a folder number; the available numbers are "01 to 10"
(Note: Press and hold ▲or ▼continuously for at least two seconds to scroll quickly).
5. Press SHIFT when done
Folder Name (Screen 1)
Folder Name (Screen 2)
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4.5.2 File name: Set a file name in the SD Memory Card
1. In the Setup Mode, scroll down to the FILE NAME parameter using the up and down arrow
keys
2. The screen will show the "NO FILE" indicator in the REC Date option area when the
selected file is new.
3. The screen will show the recording date and time in the REC Date option area for existing
data files.
File Name (Screen 1)
File Name (Screen 2)
4. Press the SHIFT button. The “SHIFT 1” icon will appear on the upper right side of the
screen and the first half of the File Name which represents the number of wires and phases
(3P4, for example) will be highlighted and ready for editing. Use the arrow keys to select
the desired configuration. Select 1P/2W (1P2), 1P/3W (1P3), 3P/3W (3P3), or 3P/4W
(3P4). See Figure 4-5-2c below.
5. Press SHIFT again and the “SHIFT 2” icon will appear on the upper right side of the screen
and the second half of the File Name, which the user can customize as needed, will be
highlighted. Use the arrow keys to select a number between 001 and 0050 inclusive. See
Figure 4-5-2d below.
6. File Name Examples:
a. 1P201001: 1P2 is one phase by two wires, 01 is the folder number, and 001 is the file number
b. 1P301001: 1P3 is one phase by three wires, 01 the folder number, and 001 the file number
c. 3P301001: 3P3 is three phases by three wires, 01 the folder number, and 001 the file number.
d. 3P401001: 3P4 is three phases by four wires, 01 the folder number, and 001 the file number.
7. Press the SHIFT key again to continue with the Setup Mode editing.
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File Name (Screen 3)
File Name (Screen 4)
4.5.3 Set the Sampling Time (datalogging rate) for recording onto the SD Memory Card
1. In the Setup Mode, use the up and down arrow keys to scroll to the SAMPLING TIME field.
2. Press the SHIFT key and the symbol "SHIFT1" will switch ON.
3. Use the arrow keys to adjust the sampling time; the range is 2 to 7200 seconds.
4. Press the SHIFT key again to return to Setup Mode editing.
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4.5.4 Delete a file on the SD Memory Card
1. In the Setup Mode, scroll to the DELETE FILE field using the up and down arrow keys.
2. Press and hold the SETUP/ENTER key for at least 2 seconds and the indicators “Y” and
“N” will appear next to the DELETE FILE field. Use the right and left arrow keys to highlight
“Y” for YES or “N” for NO and then momentarily press the SETUP/ENTER key.
3. If “Y” is selected, the current file will be erased. If “N” is selected, the delete process will be
aborted. When a file is deleted the field next to DELETE FILE will show 100%. When a
delete is aborted, the field shows 0%.
4.5.5 Formatting an SD Memory Card
1. In the Setup Mode, use the arrow keys to scroll to the SD FORMAT field
2. Press and hold the SETUP/ENTER button for at least 2 seconds and the “Y” and “N”
indicators will appear next to the SD FORMAT field
3. Use the right and left arrow buttons to highlight the desired letter: “Y” to confirm formatting
or “N” to abort the formatting.
4. While formatting, the field next to the SD FORMAT field will show the formatting progress 0
to 100%.
5. Note that the display screen shows USE SIZE (amount of memory currently used on the
SD card), FREE SIZE (amount of memory available), and TOTAL SIZE (total size of the
SD card memory) below the SD FORMAT field.
4.5.6 Potential Transformer (PT) Setup
1. In the Setup Mode, use the up and down arrow keys to scroll to the PT field.
2. Press SHIFT, the display "SHIFT1" will switch ON
3. Use the ▲or ▼keys to adjust the PT value (the range is 1 to 1000)
4. Press SHIFT again to return to Setup Mode editing or press EXIT to leave the Setup mode.
4.5.7 Current Transformer (CT) Setup
1. In the Setup Mode, use the up and down arrow keys to scroll to the CT field.
2. Press SHIFT, the display "SHIFT1" will switch ON
3. Use the ▲or ▼keys to adjust the CT value (the range is 1 to 600)
4. Press SHIFT again to return to Setup Mode editing or press EXIT to leave the Setup mode.
4.5.8 Audible Beeper ON/OFF
1. In the Setup Mode, use the up and down arrow keys to scroll to the BEEP field.
2. Press SHIFT, the display "SHIFT1" will switch ON
3. Use the ▲or ▼keys to select ON or OFF
4. Press SHIFT again to return to Setup Mode editing or press EXIT to leave the Setup mode.
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4.5.9 Transient Reference (Trans. Ref.)
The Transient Reference parameter sets the nominal voltage used for a transient detect
reference.
1. In the Setup Mode, use the up and down arrow keys to scroll to the TRANS REF field.
2. Press SHIFT, the display "SHIFT1" will switch ON
3. Use the ▲or ▼keys to select the desired voltage reference (from 50.0V to 850.0V)
4. Press SHIFT again to return to Setup Mode editing or press EXIT to leave the Setup mode.
4.5.10 SDVP (Swells/Dips Voltage)
The SDVP parameter sets the upper and lower limit range (in %) for the transient voltage
detection. For example, if the Transient Reference is set to 200V and the SDVP is set to 10%,
the SDVP range will be 180V to 220V.
1. In the Setup Mode, use the up and down arrow keys to scroll to the SDVP field.
2. Press SHIFT, the display "SHIFT1" will switch ON
3. Use the ▲or ▼keys to select the desired voltage threshold (1% to 100%)
4. Press SHIFT again to return to Setup Mode editing or press EXIT to leave the Setup mode.
4.5.11 SD Card Numerical Format (USA or European)
Note: SD Memory Cards default to the basic numerical format (USA) whereby a period is used
to separate units from tenths, for example: 20.00. European formatting uses a comma, for
example: 20,00.
1. In the Setup Mode, use the up and down arrow keys to scroll to the DECIMAL field.
2. Press SHIFT, the display "SHIFT1" will switch ON
3. Use the ▲or ▼keys to select the desired format (USA or EURO)
4. Press SHIFT again to return to Setup Mode editing or press EXIT to leave the Setup mode.
4.5.12 Set Clamp type
1. In the Setup Mode, use the up and down arrow keys to scroll to the CLAMP TYPE field.
2. Press SHIFT, the display "SHIFT1" will switch ON
3. Use the ▲or ▼keys to select the appropriate clamp type.
4. Press SHIFT again to return to Setup Mode editing or press EXIT to leave the Setup mode.
4.5.13 Set Current Range
ATTENTION: Ensure that the ‘A’ range setting matches the attached clamp’s rating
1. In the Setup Mode, use the up and down arrow keys to scroll to the “A RANGE” field.
2. Press SHIFT, the display "SHIFT1" will switch ON.
3. Use the ▲or ▼keys to select the current range.
4. Press SHIFT again to return to Setup Mode editing or press EXIT to leave the Setup mode.
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4.5.14 Set Voltage Range
1. In the Setup Mode, use the up and down arrow keys to scroll to the “V RANGE” field.
2. Press SHIFT, the display "SHIFT1" will switch ON
3. Use the ▲or ▼keys to select the voltage (Note that unless the CLAMP TYPE is set to
OTHER, this value is fixed)
4. Press SHIFT again to return to Setup Mode editing or press EXIT to leave the Setup mode.
4.5.15 Set RS-232 Output Parameters
1. In the Setup Mode, use the up/down arrow keys to scroll to the “RS232 OUT SEL” field.
2. Press the SETUP/ENTER key to access the RS232 Output selection mode. There are four
(4) pages of output selections, nine of which can be selected at any one time.
3. Use all of the four arrow buttons to navigate the output choices.
4. To select an output type, press the SETUP key (the selection will highlight).
5. To de-select a selected output type, press the SETUP key (the highlight will switch off).
6. Press and hold the SHIFT key for > 2 seconds to clear all RS-232 output selections.
7. To scroll from page to page, press the SHIFT button momentarily (there are four pages)
8. Press the EXIT button to exit the RS232 output mode.
9. If more than nine items are selected the display will show the indicator "full".
RS232 – Output Selection Pages
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4.5.16 Set Time and Date
1. In the Setup Mode, use the up and down arrow keys to scroll to the YEAR, MONTH, DATE,
HOUR, MINUTE, and SECOND fields.
2. Press SHIFT key when the desired field is selected, the display "SHIFT1" will switch ON
3. Use the ▲or ▼keys to change the date or time value
4. Press SHIFT again to return to Setup Mode editing or press EXIT to leave the Setup mode.
4.5.17 Exit the Setup Mode
When all of the programming has been completed, press the EXIT key to return to the
measurement mode of operation.
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