382090 382091 V4.0 09/07
6
1.
Input jacks for test leads (U1, U2, U3, N)
2.
Input jacks for current probes (I1, I2, I3, I4)
3.
Plug for external AC adaptor
4.
Optical RS232 PC interface output
5.
LCD display
6.
WIRING key
Select the type of electrical system under test using the WIRING key.
Select 1P2W (for signal-phase two-wire power lines), 1P3W (for signal-
phase three-wire power lines), 3P3W2M (for three-phase three-wire power
line without neutral using the two power meter method; use this selection
when measuring three-phase power with 2-current probe measurement
only) and 3P4W (for three-phase four-wire power lines with neutral)
7.
key
Phase sequence detection function key. In the 3P4W mode, press and
hold this key to display the phase detection results as follows:
Normal phase
Reverse phase
8.
HOLD key
Data hold function key, press HOLD key to freeze displayed reading (the
HOLD icon will appear). Press HOLD again to exit Hold function.
9.
key
Backlight function key, press to turn backlight on or off. The backlight will
switch off automatically after 30 seconds.
10.
PF key
Press to view the power factor value (the PF icon is displayed)
11.
Θ
key
Press to view the measured phase angle value (
ψ
icon is displayed)
12.
Hz key
Press to display the measured frequency (the Hz icon is displayed)
13.
I4 key
Press to display the I4 current probe value (the I4 icon is displayed)
14.
SET key
Press and hold the TIME key then press the SET key to enter the time set
mode and datalogger sampling rate set mode
15
TIME key
Press to display the
current date and time
16.
↵
Used when setting the date and time. Also used to recall manually
recorded data
17.
START key
Press to start the automatic datalogging function
18.
STOP key
Press to stop/pause the automatic datalogging function. Press START to
resume recording.
19.
MEMORY
Press key to store one reading (set), the ‘M’ icon and the memory address
will display (total manual memory size is 99 sets)
20.
READ key
Press to recall a manually stored data set
21.
POWER
Press to
display the measured power. Use this button to cycle through the
Pt123, Qt123 and St123 displays
22.
ENERGY
Press to
display the total integrated power energy
23.
KEY Lock
Press to lock all of the keys except the
and
keys
24.
key
Power on-off key
