SchCh00P, SchCh01P, SchCh02.01P

Digital frequency meters SchCh00P, SchCh01P, SchCh02.01P are intended to measure and convert AC frequency in one-phase electrical circuits and other AC circuits into output unified DC signals and to transmit measured values through serial digital interface RS485.
The digital meters are single-channel and single-scale meters with designs by overall dimensions, input voltage measurement ranges, supply voltage, availability of interface, digital and analogue outputs, indicators colour.
The panel digital frequency meters are used in the energy industry and other sectors of industry for control of electrical parameters.

Specifications

Documentation

Overall drawings

Type	Overall dimensions, mm	Sign height, mm	Weight, kg, maximum
SchCh00P	48 × 24 × 90	9.9	0.2
SchCh01P	96 × 24 × 90	9.9	0.2
SchCh02.01P	96 × 48 × 90	20	0.3

Accuracy class	– when measuring input signal frequency – 0.05; – when converting – 0.5
Temperature range (operating)	-40 °С…+50 °С
Maximum indication range	0...9999
Frequency measurement range	10...9999 Hz
Frequency conversion range*	45 ... 55 Hz (by default)
Number of measuring channels	1
Number of displayed parameters	1
Galvanic isolation of input and output circuits, power circuits	The meters have galvanic isolation in the power circuit, output circuits (SchCh00P meters have no galvanic isolation in interface RS circuit)
Front frame protection level	IP50
Interface RS485 (protocol Modbus RTU)	Quantity: 0 or 1
Interface exchange rate	9600, 19200, 38400, 57600 bit/s.
Analogue output (accuracy class 0.5)	Quantity: 0, 1, 2 Ranges: 0...5 mA, 4…20 mA, 0...20 mA, 0…2.5…5 mA, 4…12…20 mA, 0…10…20 mA
Load resistance, kΩ	0.5 (for 4...20 mA, 0...20 mA, 4…12…20 mA, 0…10…20 mA) 2.5 (for 0...5 mA, 0…2.5…5 mA)
Digital output	Quantity: 0; 1; 2; DC voltage 300 V, 100 mA or AC voltage 200 V, 100 mA
Maximum permissible input signal overload	150%
Time of setting output analogue signal, max	0.5 s
Input resistance at voltage measurement, min.	(1±0.005) MΩ
Power supply	– 5 V (5±0.25) VDC – 12 V (12 ± 0.6) VDC (with protection against wrong connection of supply voltage polarity) – 24 V (24±1.2) VDC – 5 VN (5+4/-0.5) VDC – 12 VN (12+6/-3) VDC – 24 VN (24 +12/-6) VDC (with protection against wrong connection of supply voltage polarity) – outer unit of balanced supply voltage of 5 V (for SchCh00P meter) SchCh02.01P meters provide power redundant for designs with supply voltage of (12 +6/-3) V and (24 +12/-6) V.
Power consumption, max	SchCh00P – 1.7 VA; SchCh01P – 2.7 VA; SchCh02.01P – 3.2 VA
Calibration interval	10 years
Guarantee period	36 months
Mean life, min	20 years
Mean time between failures	200000 hours
* Frequency conversion range may be of any value within the frequency measurement range.

Order form

SchCha – b – с – d – e – f– g

а – meter type (by the Overall dimension, mm):

SchCh00P – 48×24,

SchCh01P – 96×24,

SchCh02.01P – 96×48,

b – reference designation of input voltage range:

250 V – For the meters SchCh00P, SchCh01P,

150 V, 500 V – for SchCh02.01P meter,

c – reference designation of supply voltage:

– 5 V (5±0.25) VDC

– 12 V (12 ± 0.6) VDC (with protection against wrong connection of supply voltage polarity)

– 24 V (24±1.2) VDC

– 5 VN (5+4/-0.5) VDC

– 12 VN (12+6/-3) VDC

– 24 VN (24 +12/-6) VDC (with protection against wrong connection of supply voltage polarity)

– outer unit of balanced supply voltage of 5 V

(for SchCh00P meter)

d – availability of interface RS485:

1RS – one interface,

× – no interface;

e – reference designation of analogue and digital outputs

01 – one digital outputs without analogue outputs,

10 – one analogue output without digital input,

11 – one analogue and one digital output,

12 – one analogue and two digital outputs,

20 – two analogue outputs without digital ones,

22 – two analogue and two digital outputs,

х – without analogue and digital outputs

Note – the reference designation of analogue output is specified after figures in brackets: А – 0...5 mA, B – 4...20 mA, С – 0...20 mA, АР – 0…2.5…5 mA, ВР – 4…12…20 mA, СР – 0…10…20 mA, when ordering two analogue outputs, specify it separated by a comma;

f – indicators colour:

R – red,

G – green,

Y – yellow;

g – digit:

4.0 (measurement range – 10...9999 Hz; accuracy class – 0.05).

SchCha meter type	Full reference designation code parameter
SchCha meter type	b	c	d	e	f	g	h
SchCh00P	250	×, 5V, 12V, 24V	×, 1RS	×	+	4,0	+
SchCh01P	250	5V, 12V, 24V	×, 1RS	×, 01, 10, 11	+	4,0	+
SchCh0.01P	150, 500	5VN, 12VN, 24VN	1RS	×, 12, 20, 22	+	4,0	+
Note Sign “+” means that availability of all possible versions of a parameter in the order formula. Sign “x” means that no parameter is available in the order formula. For SchCh00P meter, interface RS485 without galvanic isolation.

Ordering examples

SchCh00P – 250V – × – × – × – З – 4.0, TU 25-7504. 228-2015

SchCh00P meter, input voltage of 250 V, with outer unit of balanced supply voltage of 5 V without interface, analogue and digital outputs; green indication, digit 4.0.

SchCh01P – 250V – 12V – 1RS – × – З – 4.0, TU 25-7504. 228-2015

SchCh01P meter, input voltage of 250 V, balanced supply voltage of 12 VDC, one interface RS485, without analogue and digital outputs; green indication, digit 4.0.

SchCh00P, SchCh01P, SchCh02.01P

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