Analogue Pointer - Type Frequency Meter
Data Sheet
ZQ 48
Analogue Pointer Type Frequency Meters
ZQ 72
ZQ 96
ZQ 144
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Page 1 of 4
Version : 1 / 01 / I / VI / 1111 / A
Application
Standard Measuring Ranges
The pointer type frequency meters, ZQ 48/72 / 96/144 housed
in moulded polycarbonate cases are suitable for the measurement
of frequencies in the range of 45 to 450 Hz.
Frequency Range
45.....50.....55 Hz
45.....55.....65 Hz
55.....60.....65 Hz
360...400...440 Hz
380...400...420 Hz
For maximum accuracy, the essential measuring range is obtained
by supressing the unwanted frequency span.
These instruments offer several advantages in switchboard and
Generating Set Panels. Number of meters can be mounted in a
single Cut out (Mosaic mounting). Front glass, Bezel & Dial can
be easily replaced.
Rated input
voltage
Features
• Linear Scale
• Glass filled polycarbonate Lousing.
• Knife edge pointer.
• Easily replicable glass and bezel.
• Easy installation with swivel screws.
Functional Principle
Frequencies are measured with a built in electronic transducer &
moving coil indicator. Moving coil movement has pivots of very
high hardness. Movement is suspended between spring loaded
saphire jewels. Movement is properly shielded & critically damped
by eddy currents induced in coil former.
Scale and Pointer
Specifications
Electrical
Mechanical Data
Case details
Moulded square case suitable for
mounting in Control / Switchgear panels.
Machinery consoles.
Case material
Front facia
Glass filled polycarbonate,
flame retardant and drip proof
as per UL 94 V-0.
Glass
Colour of bezel
Black
Position of use
Vertical
Panel fixing
Swivel screws
Mounting
Stackable in a single cutout
Panel thickness
£
25 mm
Terminals
Hexagon studs, M4 screws
And wire clamps E3
Electrical Data
Measured quantity
Input quantity
Overload capacity
Continuously
Short duration
Enclosure code
(IEC 529)
Insulation class
Rated insulation voltage
Proof voltage
Installation catagory
Insulation resistance
Power consumption
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57.7 V
63.5V
100 V
110 V
115 V
120 V
127 V
208 V
220 V
230 V
240 V
289 V
380 V
400 V
415 V
440 V
440 V
500 V
Frequency
Alternating voltage in sine waveform
(acc. to IS: 1248 / IEC 51)
1.2 times rated voltage
2 times rated voltage,5 sec
IP 52 case
IP 00 for terminals without back cover
IP 20 for terminals with back cover
Group A according to VDE 0110
660V
2KV
300V CAT III
> 50 Mohm at 500 V d.c
<=7VA
Pointer
Knife - edge pointer
Pointer deflection
Scale characteristics
Scale Division
0...90
Scale length
ZQ 48
41mm
linear *
Coarse - fine
ZQ 72
63 mm
ZQ 96
97mm
ZQ 144
146 mm
Accuracy at Reference Conditions
Accuracy class
0.5 according to IS: 1248
(IEC 51/ DIN EN 60051)
Reference conditions
Ambient temperature
Position of use
230C ± 20 C
Nominal position ± 10
Input
Other conditions
Rated Value of measured quantity
IS : 1248 (IEC 51/ DIN EN 60051)
Preheating time
Nominal range of use
Ambient temperature
Position of use
External magnetic field
Voltage
>= 3 min
0...500C
Nominal position ± 50
0.5 mT
Rated Voltage ± 15 %
Environmental Conditions
Climatic suitability
:
Operating temperature
Storage temperature
Relative humidity
Shock resistance
Vibration resistance
:
:
:
:
:
Pollution degree
:
Page 2 of 4
Climate category II as per IS : 1248
(climatic class 3 according to
VDE/VDI 3540)
- 10... + 550C
- 25... + 650C
£
75% annual average, non-condensing
15g, 11ms
10-55-10 Hz / 0.15mm
1.5 g at about 50 Hz.
2
Version : 1 / 01 / I / VI / 1111 / A
Applicable Standards
• Scales should be replaced under Voltage- free conditions.
Nominal case and cutout dimensions for
indicating Electrical instruments
Scale and pointer for electrical measuring
instruments
Connections and Terminal markings for
panel meters
Terminal bolts / leads.
Clamp straps for connections
Safety requirements and protecti ve
measures for Electrical indicating.
instruments and their accessories.
: IS 2419
• Bezels and window glasses should be replaced under
DIN 43700
Voltage - free conditions.
: IS 1248
DIN 43802
: IS 1248
DIN 43807
Connections
: DIN 46200/46282
: DIN 46282
17 18
: IS 9249
DIN 40050/8-70,
VDE 0110/ 11-72
VDE 0410/ 10-76
L1
IEC 529 , IEC 1010
Performance specifications for direct
: IS 1248
N(L2)
acting indicating analogue electrical
IEC51/DINEN60051
measuring instruments and their accessories DIN 43701
Environmental conditions
: IS 1248
IS: 9000, Part 5, 7, 8,
Dimensions
VDE / VDI 3540
Front frames for indicating measuring
: DIN 43718
instruments Principle dimensions
UL Combustibility Class
: UL 94 V-0
Technical conditions of deli very for
: DIN 43701
electrical instruments
a
d b
Mechanical strength (Free fall test,
: IS 1248 / IEC 51
vibration test)
IS 9000
VDE 0411, part 1,
Sec. 43/44, IEC 1010
E M C compliance as per following standards:
E N 50081-2,EN 50082-2,N 55011/CISPR 11,
c
EN 60555-2,IEC 555-2
e
f
EN 61000-4-4/IEC 1000-4-4,
EN 61000-4-2/IEC 1000-4-2,
Dimensions
ZQ48
ZQ72
ZQ96
ZQ144
EN 61000-4-5/IEC 1000-4-5,ENV 50140.
complywith following european directives: 89/336/EEC (EMC directive), (in mm)
73/23/EEC(low voltage directive) & amendment 93/68/EEC, for CE
a
Bezel
48
72
96
144
marking.
Case
b
43.5
66
90
136
Depth
53
53
53
53
c*
Options
d
44.5
67.5
91.5
137.5
Case
: Antiglare glass
e
Front facia
5.5
5.5
5.5
5.5
: Red,Yellow ,Blue,White.
Colour of bezel
+1
+0.6
+0.8
+0.7
45
68
92
138
Cutout Size
: Front adjustable on site
Red index pointer
Depth with
0
: on request 0 ....180
Position of use
64
64
64
64
f **
Back cover
0.15
kg.
0.21
kg.
0.28
kg.
0.49
kg.
Dial
Weight (approx.)
: With initial and end values marked.
Blank dial
: Numbering / Lettering.
Special markings
: Basic
Division dials
. divisions without numbering.
Colour markings/bands : Red or green
Safety Terminal Protection
Full sized polycarbonate back co ver to provide protection
against accidental contact (hand and fingers) acc.to IS 9249,
VDE 0410.
Safety Precautions
• Instruments with damaged bezels or window glasses must
be disconnected from mains.
• Adequate safety clearance must be maintained to control
panel fasteners and to sheet metal housing, if non - insulated
connector wires are used.
• The back cover must be snapped into place after the
connector wires have been clamped for protection against
accidental contact.
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Page 3 of 4
Version : 1 / 01 / I / VI / 1111 / A
Ordering Information
Type ZQ
Pointer type frequency meter
Front dimension
48
72
96
144
48 mm x 48 mm
72 mm x 72 mm
96 mm x 96 mm
144 mm x 144 mm
Measuring Ranges
Refer to table inside
Terminal protection
Full sized polycarbonate back cover
Front facia
Normal glass *1
Antiglare glass *3
Colour of bezel
Black *1
Red,Blue,Yellow,White*3
Position of use
Vertical *1
0
On request 0 .... 180
*3
Dial
Standard scale same as measuring range *1
Blank dial with division *3
*3
Additional lettering on request
*3
Additional numbering on request
*3
Coloured marking red or green
Coloured sector red or green*3
Logo
RISHABH , for Indian sales
C.G.*1, for export through
Crompton Greaves I.D.
Others*3
*1
*3
*1
standard
Please clearly add the desired specifications while ordering
Ordering example
ZQ 72 Measuring range 45....50....55 Hz, rated voltage AC 230V
Specifications are subject to change without notice(11/11)
.
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RISHABH INSTRUMENTS PVT.LTD.
F-31, MIDC, Satpur, Nashik-422 007,India.
Tel.: +91 253 2202160, 2202202 Fax : +91 253 2351064
E-mail : India :- marketing@rishabh.co.in
International :- exp.marketing@rishabh.co.in
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Page 4 of 4
Version : 1 / 01 / I / VI / 1111 / A
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