Keyboard - Sonel MZC-310S Operating Manual

5 Test terminal U
2
Terminal to connect the voltage neutral cable N or the protective cable PE (PEN) in the four-pole meth-
od of short-circuit loop impedance measurement or the cable to measure alternating voltage.
6 Test terminal U
ST/T
Terminal to connect the protective cable PE (PEN) in the function of touch voltage U
an electrode (probe) in the touch shock voltage U
7 Test terminal RS-232C
Terminal to connect a serial communications cable (RS-232C).

4.4.2 Keyboard

8
Key
Switching the device power supply on and off.
9 Rotary mode switch
Selection of measurement function:

U - measurement of alternating voltage


=42A) – measurement of short-circuit loop impedance by the two-pole method using a cur-
2p (I
max
rent not exceeding 42A (short-circuit resistor R

=280A) – measurement of short-circuit loop impedance by the four-pole method using a cur-
4p (I
max
rent not exceeding 280A (short-circuit resistor R

MEM – memory browsing
10 Key
Starting the measurement of short-circuit loop impedance or short-circuit current.
11 Keys
Set of cursor keys with auto-repetition function activated by holding the key depressed:

,

,
12 Key

Confirmation of selected option

On completing of the measurement:

Start of the memory write mode
 In the memory write mode – storing the measurement result in the selected cell
13
Key
Selection of additional functions:

Display contrast adjustment

Starting the data transmission mode

Setting the measurement and display parameters

Language selection

Advanced functions

Manufacturer and software info
(U )
B
- Selection of an option vertically, change of the bank number
- Selection of an option horizontally, change of the cell number
measurement mode.
T

= 10 )
zw

=1.5 ) and touch voltage measurement
zw
measurement or
ST
9